fnc

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Difference From 0.4 To 0.5

2021-11-03 11:34
[9d73a79fa8] Bump version number: 0.6 (user: mark tags: trunk)
2021-11-03 11:28
[02e93d1924] CHANGES for 0.5 (user: mark tags: trunk, 0.5)
2021-11-03 11:06
[d10389ebe4] Complete move of fnc_strl{cpy,cat} to the library. (user: mark tags: trunk)
2021-10-31 13:18
[b977d0e1f4] Bump version number: 0.5 (user: mark tags: trunk)
2021-10-31 12:21
[3cc00310ea] CHANGES for 0.4 (user: mark tags: trunk, 0.4)
2021-10-31 11:23
[22126a3f58] Improve documentation and amend incorrect path in README. (user: mark tags: trunk)

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-







*.res
*.sl
*.so
*~
*.vg
*.massif
*._out
Makefile
autosetup/jimsh0
config.log
config.make
bindings/cpp/Makefile
bindings/cpp/test
doc/Doxyfile
f-apps/Makefile

Changes to CHANGES.md.








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**fnc 0.5** 2021-11-03

- simplify the build system to make-only and remove autosetup (patch from sdk)
- remove invalid fsl_errno_to_rc() call and redundant alloc error check
- reduce noise on app exit by removing redundant error output
- relocate fnc_strlcpy() and fnc_strlcat() routines to the library

**fnc 0.4** 2021-10-31

- resolve database bug in the commit builder logic
- prune dead code leftover from the initial single-threaded blame implementation
- improve error handling of commands that return no records
- update in-app help with blame key bindings
- expand tree command's ability to display trees of versions with missing files

Added LICENSE.














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Copyright (c) 2021 Mark Jamsek <mark@jamsek.com>

Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Added Makefile.































































































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#
# FNC Makefile
#

# CONFIGUGRAION
CC ?=		cc
PREFIX ?=	/usr/local
MANDIR ?=	/share/man
VERSION ?=	0.5

# USED BELOW FOR PLATFORM SPECIFIC LDFLAGS
UNAME :=	$(shell uname -s)

# FLAGS NEEDED TO BUILD SQLITE3
SQLITE_CFLAGS =	${CFLAGS} -Wall -Werror -Wno-sign-compare -pedantic -std=c99 \
		-DNDEBUG=1 \
		-DSQLITE_DQS=0 \
		-DSQLITE_THREADSAFE=0 \
		-DSQLITE_DEFAULT_MEMSTATUS=0 \
		-DSQLITE_DEFAULT_WAL_SYNCHRONOUS=1 \
		-DSQLITE_LIKE_DOESNT_MATCH_BLOBS \
		-DSQLITE_OMIT_DECLTYPE \
		-DSQLITE_OMIT_PROGRESS_CALLBACK \
		-DSQLITE_OMIT_SHARED_CACHE \
		-DSQLITE_OMIT_LOAD_EXTENSION \
		-DSQLITE_MAX_EXPR_DEPTH=0 \
		-DSQLITE_USE_ALLOCA \
		-DSQLITE_ENABLE_LOCKING_STYLE=0 \
		-DSQLITE_DEFAULT_FILE_FORMAT=4 \
		-DSQLITE_ENABLE_EXPLAIN_COMMENTS \
		-DSQLITE_ENABLE_FTS4 \
		-DSQLITE_ENABLE_DBSTAT_VTAB \
		-DSQLITE_ENABLE_JSON1 \
		-DSQLITE_ENABLE_FTS5 \
		-DSQLITE_ENABLE_STMTVTAB \
		-DSQLITE_HAVE_ZLIB \
		-DSQLITE_INTROSPECTION_PRAGMAS \
		-DSQLITE_ENABLE_DBPAGE_VTAB \
		-DSQLITE_TRUSTED_SCHEMA=0

# This makefile
MAKEFILE := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))

# FLAGS NEEDED TO BUILD LIBFOSSIL
FOSSIL_CFLAGS =	${CFLAGS} -Wall -Werror -Wsign-compare -pedantic -std=c99

# On SOME Linux (e.g., Ubuntu 18.04.6), we have to include wchar curses from
# I/.../ncursesw, but linking to -lncursesw (w/ no special -L path) works fine.
# FLAGS NEEDED TO BUILD FNC
FNC_CFLAGS =	${CFLAGS} -Wall -Werror -Wsign-compare -pedantic -std=c99 \
		-I./lib -I/usr/include/ncursesw -D_XOPEN_SOURCE_EXTENDED \
		-DVERSION=${VERSION}

FNC_LDFLAGS =	${LDFLAGS} -lm -lutil -lz -lpthread -fPIC

# OSX has ncursesw, and needs iconv.
ifeq ($(UNAME),Darwin)
# OSX
FNC_LDFLAGS +=	-lncurses -lpanel -liconv
else
# Linux (tested on Debian), OpenBSD, FreeBSD
FNC_LDFLAGS +=	-lncursesw -lpanelw
endif

all: bin

bin: lib/sqlite3.o lib/libfossil.o src/fnc.o src/fnc

lib/sqlite3.o: lib/sqlite3.c lib/sqlite3.h $(MAKEFILE)
	${CC} ${SQLITE_CFLAGS} -c $< -o $@

lib/libfossil.o: lib/libfossil.c lib/libfossil.h $(MAKEFILE)
	${CC} ${FOSSIL_CFLAGS} -c $< -o $@

src/fnc.o: src/fnc.c $(MAKEFILE)
	${CC} ${FNC_CFLAGS} -c $< -o $@

src/fnc: src/fnc.o lib/libfossil.o lib/sqlite3.o $(MAKEFILE)
	${CC} -o $@ src/fnc.o lib/libfossil.o lib/sqlite3.o ${FNC_LDFLAGS}

install:
	install -s -m 0755 src/fnc ${PREFIX}/bin/fnc
	install -m 0644 src/fnc.1 ${PREFIX}${MANDIR}/man1/fnc.1

uninstall:
	rm -f ${PREFIX}/bin/fnc ${PREFIX}${MANDIR}/man1/fnc.1

clean:
	rm -f lib/*.o src/*.o src/fnc

release: clean
	tar czvf ../fnc-${VERSION}.tgz -C .. fnc-${VERSION}

.PHONY: clean release

Deleted Makefile.in.

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#!/usr/bin/make # help out emacs
#
# Top-level autosetup-filtered Makefile for libfossil. This particular
# build is for Unix platforms with GNU Make 3.81+.
all:
.NOTPARALLEL: # stop subdir makes and reconfigure from launching
              # multiple times concurrently.
include config.make
ShakeNMake.CISH_SOURCES := $(wildcard *.c)
# Subdir cleanup rules and deps list must come before shakenmake.make is included
# or they must be set up manually afterwards...
clean-.: clean-fnc clean-src
distclean-.: distclean-fnc distclean-src
include shakenmake.make
MAIN_MAKEFILES := $(PACKAGE.MAKEFILE) $(ShakeNMake.MAKEFILE) @AUTODEPS@

SUBDIRS := src fnc
$(eval $(call ShakeNMake.CALL.SUBDIRS,$(SUBDIRS)))
subdir-fnc: subdir-src
all: subdir-src subdir-fnc

DISTCLEAN_FILES += config.make

########################################################################
# Other stuff...

ifeq ($(MAKE_COMPILATION_DB),yes)
all: compile_commands.json
compile_commands.json:
	@$(RM) $@
	sed -e '1s/^/[\'$$'\n''/' -e '$$s/,$$/\'$$'\n'']/' $(compdb_dir)/*.o.json > $@+
	@if test -s $@+; then mv $@+ $@; else $(RM) $@+; fi
endif

DISTCLEAN_FILES += Makefile config.log autosetup/jimsh0 \
	$(wildcard compile_commands/*) compile_commands.json+

# Reconfigure if needed
ifeq ($(findstring clean,$(MAKECMDGOALS)),)
@top_srcdir@/config.make: @AUTODEPS@ @top_srcdir@/config.make.in
	@@AUTOREMAKE@
@top_srcdir@/Makefile: @AUTODEPS@ @top_srcdir@/Makefile.in
	chmod +w $@
	@@AUTOREMAKE@
@top_srcdir@/vars.make: @AUTODEPS@ @top_srcdir@/vars.make.in
	@@AUTOREMAKE@
endif

# Or on demand
reconfig:
	@AUTOREMAKE@

Changes to README.md.

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# Build

1. clone the repository
  - `fossil clone https://fnc.bsdbox.org`
2. move into the repository checkout
  - `cd fnc`
3. run the configure script
  - `./configure`
4. build fnc
3. build fnc
  - `make`
5. install the `fnc` binary (*requires privileges*)
4. install the `fnc` binary (*requires privileges*)
  - `doas make install`
6. move into an open Fossil checkout, and run it:
5. move into an open Fossil checkout, and run it:
  - `cd ~/museum/repo && fossil open ../repo.fossil && fnc`

This will install the `fnc` executable and man page into `/usr/local/bin` and
`/usr/local/share/man/man1`, respectively. To change the install path, use the
`/usr/local/share/man/man1`, respectively. Alternatively, cryptographically
`--prefix` option to `configure`; for example, replacing step 3 with
`./configure --prefix=$HOME` will install the executable and man page into
`~/bin` and `~/share/man`, respectively. Alternatively, cryptographically signed
binaries for some of the abovementioned platforms are available to [download][3].
signed binaries for some of the abovementioned platforms are available to
[download][3].

# Doc

See `fnc --help` for a quick reference, and the [fnc(1)][4] manual page for more
comprehensive documentation. In-app help can also be accessed with the `?`,
`F1`, or `H` key binding. The following video briefly demonstrates some of the
key bindings in use.

Deleted auto.def.

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# vim:se syn=tcl:
#
use cc cc-shared cc-lib wh-common

options {
    no-debug=0 => "Disable debug build options."
    loud=0 => "Enables 'loud' build mode."
    profile=0 => "Enables the -pg (profiling) compile/link flag if CC is gcc."
    no-compile-commands=0 =>
      "Disable compile_commands.json support even if detected (possibly incorrectly)."
}


# autosetup interceps 'debug' and 'enable-debug' flags :/
#    prefix:=[get-env HOME /usr/local] -> "Installation prefix."

#cc-check-c11

wh-require-bash
cc-check-sizeof "void *"

if {![cc-check-includes zlib.h] ||
    ![cc-check-function-in-lib compress z]} {
    user-error "Missing functional zlib"
}
cc-check-function-in-lib iconv iconv

########################################################################
# Checks for C99 via (__STDC_VERSION__ >= 199901L). Returns 1 if so, 0
# 0 if not.
proc cc-check-c99 {} {
    msg-checking "Checking for C99 via __STDC_VERSION__... "
    if {[cctest -code {
        #if !defined(__STDC_VERSION__) || __STDC_VERSION__<199901L
        # error "Not C99"
        #endif
    }]} {
        msg-result "got C99"
        return 1
    }
    return 0
}

# The compiler may be able to run in C99 mode without -std=c99, but we
# check for that flag anyway because without it we might inadvertently
# be compiling against a newer C standard for purposes of flags like
# -pedantic
set CC_FLAG_C99 {-std=c99}
if {![cc-check-flags $CC_FLAG_C99]} {
    set CC_FLAG_C99 {}
}
if {![cc-check-c99]} {
    user-error "As of 2021-02-21, libfossil requires C99."
}

define CC_FLAG_C99 $CC_FLAG_C99

# cc-check-functions getcwd fopen
cc-check-functions opendir stat pipe inet_ntop getaddrinfo
#msg-result [cc-check-functions lstat]

if {[cc-check-functions lstat]} {
    # for lstat() on Linux and FreeBSD:
    define _XOPEN_SOURCE 600
    # alternate for lstat() on Linux:
    # define _BSD_SOURCE 1
    # ^^^^ causes warning (-Werror breakage) with glibc >=2.20
    define _DEFAULT_SOURCE 1
    define _POSIX_C_SOURCE 200112L
}

# Find some tools
cc-check-tools ar strip
wh-bin-define install

set extra_objs {}

if {[find-an-executable cygpath] ne "" || $::tcl_platform(os)=="Windows NT"} {
  set cFlags {}
} else {
  set cFlags {-fPIC}
}

if {![wh-check-ncurses]} {
    user-error "Could not find a compatible ncurses/libpanel configuration."
}

if {[opt-bool no-debug]} {
    msg-result "Non-debug build."
    set cFlags "$cFlags -O2"
} else {
    msg-result "Debug build enabled. Use --no-debug to build in non-debug mode."
    set cFlags "$cFlags -g -DDEBUG -O0"
}

wh-check-compile-commands no-compile-commands

define CFLAGS $cFlags
if {[wh-opt-bool-01 -v loud BUILD_QUIETLY]} {
    puts "Enabling quiet build mode. Use --loud to enable loud mode."
}

msg-checking "gprof profiling? "
if {[wh-check-profile-flag profile]} {
  msg-result "gcc detected: building with profiling option."
  # Add CC_PROFILE_FLAG to CFLAGS and LDFLAGS in config.make.in.
} else {
  msg-result "no. Use --profile and gcc to enable."
}

# Each generated Makefile requires an input file with a .in extension:
wh-make-from-dot-in {
    config.make
    Makefile
    src/Makefile
    fnc/Makefile
}

if {0} {
    # Achtung: ordering of the -bare/-str options here is important
    # because of the mixed use of strings and integers for #defines...
    make-config-header include/fossil-scm/autoconfig.h \
        -none {DOXYGEN_*} \
        -bare {HAVE_*  FSL_ENABLE_* _DEFAULT_SOURCE _XOPEN_SOURCE} \
        -str {FSL_* PACKAGE_*}
}

Deleted autosetup/LICENSE.

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Unless explicitly stated, all files which form part of autosetup
are released under the following license:

---------------------------------------------------------------------
autosetup - A build environment "autoconfigurator"

Copyright (c) 2010-2011, WorkWare Systems <http://workware.net.au/>

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above
   copyright notice, this list of conditions and the following
   disclaimer in the documentation and/or other materials
   provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE WORKWARE SYSTEMS ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WORKWARE
SYSTEMS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation
are those of the authors and should not be interpreted as representing
official policies, either expressed or implied, of WorkWare Systems.

Deleted autosetup/README.autosetup.

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README.autosetup created by autosetup v0.7.0+

This is the autosetup directory for a local install of autosetup.
It contains autosetup, support files and loadable modules.

*.tcl files in this directory are optional modules which
can be loaded with the 'use' directive.

*.auto files in this directory are auto-loaded.

For more information, see http://msteveb.github.io/autosetup/

Deleted autosetup/autosetup.

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#!/bin/sh
# Copyright (c) 2006-2011 WorkWare Systems http://www.workware.net.au/
# All rights reserved
# vim:se syntax=tcl:
# \
dir=`dirname "$0"`; exec "`$dir/autosetup-find-tclsh`" "$0" "$@"

# Note that the version has a trailing + on unreleased versions
set autosetup(version) 0.7.0+

# Can be set to 1 to debug early-init problems
set autosetup(debug) [expr {"--debug" in $argv}]

##################################################################
#
# Main flow of control, option handling
#
proc main {argv} {
	global autosetup define

	# There are 3 potential directories involved:
	# 1. The directory containing autosetup (this script)
	# 2. The directory containing auto.def
	# 3. The current directory

	# From this we need to determine:
	# a. The path to this script (and related support files)
	# b. The path to auto.def
	# c. The build directory, where output files are created

	# This is also complicated by the fact that autosetup may
	# have been run via the configure wrapper ([getenv WRAPPER] is set)

	# Here are the rules.
	# a. This script is $::argv0
	#    => dir, prog, exe, libdir
	# b. auto.def is in the directory containing the configure wrapper,
	#    otherwise it is in the current directory.
	#    => srcdir, autodef
	# c. The build directory is the current directory
	#    => builddir, [pwd]

	# 'misc' is needed before we can do anything, so set a temporary libdir
	# in case this is the development version
	set autosetup(libdir) [file dirname $::argv0]/lib
	use misc

	# (a)
	set autosetup(dir) [realdir [file dirname [realpath $::argv0]]]
	set autosetup(prog) [file join $autosetup(dir) [file tail $::argv0]]
	set autosetup(exe) [getenv WRAPPER $autosetup(prog)]
	if {$autosetup(installed)} {
		set autosetup(libdir) $autosetup(dir)
	} else {
		set autosetup(libdir) [file join $autosetup(dir) lib]
	}
	autosetup_add_dep $autosetup(prog)

	# (b)
	if {[getenv WRAPPER ""] eq ""} {
		# Invoked directly
		set autosetup(srcdir) [pwd]
	} else {
		# Invoked via the configure wrapper
		set autosetup(srcdir) [file-normalize [file dirname $autosetup(exe)]]
	}
	set autosetup(autodef) [relative-path $autosetup(srcdir)/auto.def]

	# (c)
	set autosetup(builddir) [pwd]

	set autosetup(argv) $argv
	set autosetup(cmdline) {}
	# options is a list of known options
	set autosetup(options) {}
	# optset is a dictionary of option values set by the user based on getopt
	set autosetup(optset) {}
	# optdefault is a dictionary of default values
	set autosetup(optdefault) {}
	# options-defaults is a dictionary of overrides for default values for options
	set autosetup(options-defaults) {}
	set autosetup(optionhelp) {}
	set autosetup(showhelp) 0

	use util

	# Parse options
	use getopt

	# At the is point we don't know what is a valid option
	# We simply parse anything that looks like an option
	set autosetup(getopt) [getopt argv]

	#"=Core Options:"
	options-add {
		help:=all       => "display help and options. Optional: module name, such as --help=system"
		licence license => "display the autosetup license"
		version         => "display the version of autosetup"
		ref:=text manual:=text
		reference:=text => "display the autosetup command reference. 'text', 'wiki', 'asciidoc' or 'markdown'"
		debug           => "display debugging output as autosetup runs"
		install:=.      => "install autosetup to the current or given directory"
	}
	if {$autosetup(installed)} {
		# hidden options so we can produce a nice error
		options-add {
			sysinstall:path
		}
	} else {
		options-add {
			sysinstall:path  => "install standalone autosetup to the given directory (e.g.: /usr/local)"
		}
	}
	options-add {
		force init:=help   => "create initial auto.def, etc.  Use --init=help for known types"
		# Undocumented options
		option-checking=1
		nopager
		quiet
		timing
		conf:
	}

	if {[opt-bool version]} {
		puts $autosetup(version)
		exit 0
	}

	# autosetup --conf=alternate-auto.def
	if {[opt-str conf o]} {
		set autosetup(autodef) $o
	}

	# Debugging output (set this early)
	incr autosetup(debug) [opt-bool debug]
	incr autosetup(force) [opt-bool force]
	incr autosetup(msg-quiet) [opt-bool quiet]
	incr autosetup(msg-timing) [opt-bool timing]

	# If the local module exists, source it now to allow for
	# project-local customisations
	if {[file exists $autosetup(libdir)/local.tcl]} {
		use local
	}

	# Now any auto-load modules
	autosetup_load_auto_modules

	if {[opt-str help o]} {
		incr autosetup(showhelp)
		use help
		autosetup_help $o
	}

	if {[opt-bool licence license]} {
		use help
		autosetup_show_license
		exit 0
	}

	if {[opt-str {manual ref reference} o]} {
		use help
		autosetup_reference $o
	}

	# Allow combining --install and --init
	set earlyexit 0
	if {[opt-str install o]} {
		use install
		autosetup_install $o
		incr earlyexit
	}

	if {[opt-str init o]} {
		use init
		autosetup_init $o
		incr earlyexit
	}

	if {$earlyexit} {
		exit 0
	}
	if {[opt-str sysinstall o]} {
		use install
		autosetup_install $o 1
		exit 0
	}

	if {![file exists $autosetup(autodef)]} {
		# Check for invalid option first
		options {}
		user-error "No auto.def found in \"$autosetup(srcdir)\" (use [file tail $::autosetup(exe)] --init to create one)"
	}

	# Parse extra arguments into autosetup(cmdline)
	foreach arg $argv {
		if {[regexp {([^=]*)=(.*)} $arg -> n v]} {
			dict set autosetup(cmdline) $n $v
			define $n $v
		} else {
			user-error "Unexpected parameter: $arg"
		}
	}

	autosetup_add_dep $autosetup(autodef)

	# Add $argv to CONFIGURE_OPTS, but ignore duplicates and quote if needed
	set configure_opts {}
	foreach arg $autosetup(argv) {
		set quoted [quote-if-needed $arg]
		# O(n^2), but n will be small
		if {$quoted ni $configure_opts} {
			lappend configure_opts $quoted
		}
	}
	define CONFIGURE_OPTS [join $configure_opts]
	define AUTOREMAKE [quote-if-needed $autosetup(exe)]
	define-append AUTOREMAKE [get-define CONFIGURE_OPTS]


	# Log how we were invoked
	configlog "Invoked as: [getenv WRAPPER $::argv0] [quote-argv $autosetup(argv)]"
	configlog "Tclsh: [info nameofexecutable]"

	# Load auto.def as module "auto.def"
	autosetup_load_module auto.def source $autosetup(autodef)

	# Could warn here if options {} was not specified

	show-notices

	if {$autosetup(debug)} {
		msg-result "Writing all defines to config.log"
		configlog "================ defines ======================"
		foreach n [lsort [array names define]] {
			configlog "define $n $define($n)"
		}
	}

	exit 0
}

# @opt-bool ?-nodefault? option ...
#
# Check each of the named, boolean options and if any have been explicitly enabled
# or disabled by the user, return 1 or 0 accordingly.
#
# If the option was specified more than once, the last value wins.
# e.g. With '--enable-foo --disable-foo', '[opt-bool foo]' will return 0
#
# If no value was specified by the user, returns the default value for the
# first option. If '-nodefault' is given, this behaviour changes and
# -1 is returned instead.
#
proc opt-bool {args} {
	set nodefault 0
	if {[lindex $args 0] eq "-nodefault"} {
		set nodefault 1
		set args [lrange $args 1 end]
	}
	option-check-names {*}$args

	foreach opt $args {
		if {[dict exists $::autosetup(optset) $opt]} {
			return [dict get $::autosetup(optset) $opt]
		}
	}

	if {$nodefault} {
		return -1
	}
	# Default value is the default for the first option
	return [dict get $::autosetup(optdefault) [lindex $args 0]]
}

# @opt-val optionlist ?default=""?
#
# Returns a list containing all the values given for the non-boolean options in '$optionlist'.
# There will be one entry in the list for each option given by the user, including if the
# same option was used multiple times.
#
# If no options were set, '$default' is returned (exactly, not as a list).
#
# Note: For most use cases, 'opt-str' should be preferred.
#
proc opt-val {names {default ""}} {
	option-check-names {*}$names

	foreach opt $names {
		if {[dict exists $::autosetup(optset) $opt]} {
			lappend result {*}[dict get $::autosetup(optset) $opt]
		}
	}
	if {[info exists result]} {
		return $result
	}
	return $default
}

# @opt-str optionlist varname ?default?
#
# Sets '$varname' in the callers scope to the value for one of the given options.
#
# For the list of options given in '$optionlist', if any value is set for any option,
# the option value is taken to be the *last* value of the last option (in the order given).
#
# If no option was given, and a default was specified with 'options-defaults',
# that value is used.
#
# If no 'options-defaults' value was given and '$default' was given, it is used.
#
# If none of the above provided a value, no value is set.
#
# The return value depends on whether '$default' was specified.
# If it was, the option value is returned.
# If it was not, 1 is returns if a value was set, or 0 if not.
#
# Typical usage is as follows:
#
## if {[opt-str {myopt altname} o]} {
##     do something with $o
## }
#
# Or:
## define myname [opt-str {myopt altname} o "/usr/local"]
#
proc opt-str {names varname args} {
	global autosetup

	option-check-names {*}$names
	upvar $varname value

	if {[llength $args]} {
		# A default was given, so always return the string value of the option
		set default [lindex $args 0]
		set retopt 1
	} else {
		# No default, so return 0 or 1 to indicate if a value was found
		set retopt 0
	}

	foreach opt $names {
		if {[dict exists $::autosetup(optset) $opt]} {
			set result [lindex [dict get $::autosetup(optset) $opt] end]
		}
	}

	if {![info exists result]} {
		# No user-specified value. Has options-defaults been set?
		foreach opt $names {
			if {[dict exists $::autosetup(optdefault) $opt]} {
				set result [dict get $autosetup(optdefault) $opt]
			}
		}
	}

	if {[info exists result]} {
		set value $result
		if {$retopt} {
			return $value
		}
		return 1
	}

	if {$retopt} {
		set value $default
		return $value
	}

	return 0
}

proc option-check-names {args} {
	foreach o $args {
		if {$o ni $::autosetup(options)} {
			autosetup-error "Request for undeclared option --$o"
		}
	}
}

# Parse the option definition in $opts and update
# ::autosetup(setoptions) and ::autosetup(optionhelp) appropriately
#
proc options-add {opts} {
	global autosetup

	# First weed out comment lines
	set realopts {}
	foreach line [split $opts \n] {
		if {![string match "#*" [string trimleft $line]]} {
			append realopts $line \n
		}
	}
	set opts $realopts

	for {set i 0} {$i < [llength $opts]} {incr i} {
		set opt [lindex $opts $i]
		if {[string match =* $opt]} {
			# This is a special heading
			lappend autosetup(optionhelp) [list $opt $autosetup(module)]
			continue
		}
		unset -nocomplain defaultvalue equal value

		#puts "i=$i, opt=$opt"
		regexp {^([^:=]*)(:)?(=)?(.*)$} $opt -> name colon equal value
		if {$name in $autosetup(options)} {
			autosetup-error "Option $name already specified"
		}

		#puts "$opt => $name $colon $equal $value"

		# Find the corresponding value in the user options
		# and set the default if necessary
		if {[string match "-*" $opt]} {
			# This is a documentation-only option, like "-C <dir>"
			set opthelp $opt
		} elseif {$colon eq ""} {
			# Boolean option
			lappend autosetup(options) $name

			# Check for override
			if {[dict exists $autosetup(options-defaults) $name]} {
				# A default was specified with options-defaults, so use it
				set value [dict get $autosetup(options-defaults) $name]
			}

			if {$value eq "1"} {
				set opthelp "--disable-$name"
			} else {
				set opthelp "--$name"
			}

			# Set the default
			if {$value eq ""} {
				set value 0
			}
			set defaultvalue $value
			dict set autosetup(optdefault) $name $defaultvalue

			if {[dict exists $autosetup(getopt) $name]} {
				# The option was specified by the user. Look at the last value.
				lassign [lindex [dict get $autosetup(getopt) $name] end] type setvalue
				if {$type eq "str"} {
					# Can we convert the value to a boolean?
					if {$setvalue in {1 enabled yes}} {
						set setvalue 1
					} elseif {$setvalue in {0 disabled no}} {
						set setvalue 0
					} else {
						user-error "Boolean option $name given as --$name=$setvalue"
					}
				}
				dict set autosetup(optset) $name $setvalue
				#puts "Found boolean option --$name=$setvalue"
			}
		} else {
			# String option.
			lappend autosetup(options) $name

			if {$equal ne "="} {
				# Was the option given as "name:value=default"?
				# If so, set $value to the display name and $defaultvalue to the default
				# (This is the preferred way to set a default value for a string option)
				if {[regexp {^([^=]+)=(.*)$} $value -> value defaultvalue]} {
					dict set autosetup(optdefault) $name $defaultvalue
				}
			}

			# Maybe override the default value
			if {[dict exists $autosetup(options-defaults) $name]} {
				# A default was specified with options-defaults, so use it
				set defaultvalue [dict get $autosetup(options-defaults) $name]
				dict set autosetup(optdefault) $name $defaultvalue
			} elseif {![info exists defaultvalue]} {
				# No default value was given by value=default or options-defaults
				# so use the value as the default when the plain option with no
				# value is given (.e.g. just --opt instead of --opt=value)
				set defaultvalue $value
			}

			if {$equal eq "="} {
				# String option with optional value
				set opthelp "--$name?=$value?"
			} else {
				# String option with required value
				set opthelp "--$name=$value"
			}

			# Get the values specified by the user
			if {[dict exists $autosetup(getopt) $name]} {
				set listvalue {}

				foreach pair [dict get $autosetup(getopt) $name] {
					lassign $pair type setvalue
					if {$type eq "bool" && $setvalue} {
						if {$equal ne "="} {
							user-error "Option --$name requires a value"
						}
						# If given as a boolean, use the default value
						set setvalue $defaultvalue
					}
					lappend listvalue $setvalue
				}

				#puts "Found string option --$name=$listvalue"
				dict set autosetup(optset) $name $listvalue
			}
		}

		# Now create the help for this option if appropriate
		if {[lindex $opts $i+1] eq "=>"} {
			set desc [lindex $opts $i+2]
			if {[info exists defaultvalue]} {
				set desc [string map [list @default@ $defaultvalue] $desc]
			}
			# A multi-line description
			lappend autosetup(optionhelp) [list $opthelp $autosetup(module) $desc]
			incr i 2
		}
	}
}

# @module-options optionlist
#
# Deprecated. Simply use 'options' from within a module.
proc module-options {opts} {
	options $opts
}

proc max {a b} {
	expr {$a > $b ? $a : $b}
}

proc options-wrap-desc {text length firstprefix nextprefix initial} {
	set len $initial
	set space $firstprefix
	foreach word [split $text] {
		set word [string trim $word]
		if {$word == ""} {
			continue
		}
		if {$len && [string length $space$word] + $len >= $length} {
			puts ""
			set len 0
			set space $nextprefix
		}
		incr len [string length $space$word]
		puts -nonewline $space$word
		set space " "
	}
	if {$len} {
		puts ""
	}
}

# Display options (from $autosetup(optionhelp)) for modules that match
# glob pattern $what
proc options-show {what} {
	set local 0
	# Determine the max option width
	set max 0
	foreach help $::autosetup(optionhelp) {
		lassign $help opt module desc
		if {![string match $what $module]} {
			continue
		}
		if {[string match =* $opt] || [string match \n* $desc]} {
			continue
		}
		set max [max $max [string length $opt]]
	}
	set indent [string repeat " " [expr {$max+4}]]
	set cols [getenv COLUMNS 80]
	catch {
		lassign [exec stty size] rows cols
	}
	incr cols -1
	# Now output
	foreach help $::autosetup(optionhelp) {
		lassign $help opt module desc
		if {![string match $what $module]} {
			continue
		}
		if {$local == 0 && $module eq "auto.def"} {
			puts "Local Options:"
			incr local
		}
		if {[string match =* $opt]} {
			# Output a special heading line"
			puts [string range $opt 1 end]
			continue
		}
		puts -nonewline "  [format %-${max}s $opt]"
		if {[string match \n* $desc]} {
			# Output a pre-formatted help description as-is
			puts $desc
		} else {
			options-wrap-desc [string trim $desc] $cols "  " $indent [expr {$max+2}]
		}
	}
}

# @options optionspec
#
# Specifies configuration-time options which may be selected by the user
# and checked with 'opt-str' and 'opt-bool'. '$optionspec' contains a series
# of options specifications separated by newlines, as follows:
#
# A boolean option is of the form:
#
## name[=0|1]  => "Description of this boolean option"
#
# The default is 'name=0', meaning that the option is disabled by default.
# If 'name=1' is used to make the option enabled by default, the description should reflect
# that with text like "Disable support for ...".
#
# An argument option (one which takes a parameter) is of one of the following forms:
#
## name:value         => "Description of this option"
## name:value=default => "Description of this option with a default value"
## name:=value        => "Description of this option with an optional value"
#
# If the 'name:value' form is used, the value must be provided with the option (as '--name=myvalue').
# If the 'name:value=default' form is used, the option has the given default value even if not
# specified by the user.
# If the 'name:=value' form is used, the value is optional and the given value is used
# if it is not provided.
#
# The description may contain '@default@', in which case it will be replaced with the default
# value for the option (taking into account defaults specified with 'options-defaults'.
#
# Undocumented options are also supported by omitting the '=> description'.
# These options are not displayed with '--help' and can be useful for internal options or as aliases.
#
# For example, '--disable-lfs' is an alias for '--disable=largefile':
#
## lfs=1 largefile=1 => "Disable large file support"
#
proc options {optlist} {
	global autosetup

	options-add $optlist

	if {$autosetup(showhelp)} {
		# If --help, stop now to show help
		return -code break
	}

	if {$autosetup(module) eq "auto.def"} {
		# Check for invalid options
		if {[opt-bool option-checking]} {
			foreach o [dict keys $::autosetup(getopt)] {
				if {$o ni $::autosetup(options)} {
					user-error "Unknown option --$o"
				}
			}
		}
	}
}

# @options-defaults dictionary
#
# Specifies a dictionary of options and a new default value for each of those options.
# Use before any 'use' statements in 'auto.def' to change the defaults for
# subsequently included modules.
proc options-defaults {dict} {
	foreach {n v} $dict {
		dict set ::autosetup(options-defaults) $n $v
	}
}

proc config_guess {} {
	if {[file-isexec $::autosetup(dir)/autosetup-config.guess]} {
		if {[catch {exec-with-stderr sh $::autosetup(dir)/autosetup-config.guess} alias]} {
			user-error $alias
		}
		return $alias
	} else {
		configlog "No autosetup-config.guess, so using uname"
		string tolower [exec uname -p]-unknown-[exec uname -s][exec uname -r]
	}
}

proc config_sub {alias} {
	if {[file-isexec $::autosetup(dir)/autosetup-config.sub]} {
		if {[catch {exec-with-stderr sh $::autosetup(dir)/autosetup-config.sub $alias} alias]} {
			user-error $alias
		}
	}
	return $alias
}

# @define name ?value=1?
#
# Defines the named variable to the given value.
# These (name, value) pairs represent the results of the configuration check
# and are available to be subsequently checked, modified and substituted.
#
proc define {name {value 1}} {
	set ::define($name) $value
	#dputs "$name <= $value"
}

# @undefine name
#
# Undefine the named variable.
#
proc undefine {name} {
	unset -nocomplain ::define($name)
	#dputs "$name <= <undef>"
}

# @define-append name value ...
#
# Appends the given value(s) to the given "defined" variable.
# If the variable is not defined or empty, it is set to '$value'.
# Otherwise the value is appended, separated by a space.
# Any extra values are similarly appended.
# If any value is already contained in the variable (as a substring) it is omitted.
#
proc define-append {name args} {
	if {[get-define $name ""] ne ""} {
		# Avoid duplicates
		foreach arg $args {
			if {$arg eq ""} {
				continue
			}
			set found 0
			foreach str [split $::define($name) " "] {
				if {$str eq $arg} {
					incr found
				}
			}
			if {!$found} {
				append ::define($name) " " $arg
			}
		}
	} else {
		set ::define($name) [join $args]
	}
	#dputs "$name += [join $args] => $::define($name)"
}

# @get-define name ?default=0?
#
# Returns the current value of the "defined" variable, or '$default'
# if not set.
#
proc get-define {name {default 0}} {
	if {[info exists ::define($name)]} {
		#dputs "$name => $::define($name)"
		return $::define($name)
	}
	#dputs "$name => $default"
	return $default
}

# @is-defined name
#
# Returns 1 if the given variable is defined.
#
proc is-defined {name} {
	info exists ::define($name)
}

# @is-define-set name
#
# Returns 1 if the given variable is defined and is set
# to a value other than "" or 0
#
proc is-define-set {name} {
	if {[get-define $name] in {0 ""}} {
		return 0
	}
	return 1
}

# @all-defines
#
# Returns a dictionary (name, value list) of all defined variables.
#
# This is suitable for use with 'dict', 'array set' or 'foreach'
# and allows for arbitrary processing of the defined variables.
#
proc all-defines {} {
	array get ::define
}


# @get-env name default
#
# If '$name' was specified on the command line, return it.
# Otherwise if '$name' was set in the environment, return it.
# Otherwise return '$default'.
#
proc get-env {name default} {
	if {[dict exists $::autosetup(cmdline) $name]} {
		return [dict get $::autosetup(cmdline) $name]
	}
	getenv $name $default
}

# @env-is-set name
#
# Returns 1 if '$name' was specified on the command line or in the environment.
# Note that an empty environment variable is not considered to be set.
#
proc env-is-set {name} {
	if {[dict exists $::autosetup(cmdline) $name]} {
		return 1
	}
	if {[getenv $name ""] ne ""} {
		return 1
	}
	return 0
}

# @readfile filename ?default=""?
#
# Return the contents of the file, without the trailing newline.
# If the file doesn't exist or can't be read, returns '$default'.
#
proc readfile {filename {default_value ""}} {
	set result $default_value
	catch {
		set f [open $filename]
		set result [read -nonewline $f]
		close $f
	}
	return $result
}

# @writefile filename value
#
# Creates the given file containing '$value'.
# Does not add an extra newline.
#
proc writefile {filename value} {
	set f [open $filename w]
	puts -nonewline $f $value
	close $f
}

proc quote-if-needed {str} {
	if {[string match {*[\" ]*} $str]} {
		return \"[string map [list \" \\" \\ \\\\] $str]\"
	}
	return $str
}

proc quote-argv {argv} {
	set args {}
	foreach arg $argv {
		lappend args [quote-if-needed $arg]
	}
	join $args
}

# @list-non-empty list
#
# Returns a copy of the given list with empty elements removed
proc list-non-empty {list} {
	set result {}
	foreach p $list {
		if {$p ne ""} {
			lappend result $p
		}
	}
	return $result
}

# @find-executable-path name
#
# Searches the path for an executable with the given name.
# Note that the name may include some parameters, e.g. 'cc -mbig-endian',
# in which case the parameters are ignored.
# The full path to the executable if found, or "" if not found.
# Returns 1 if found, or 0 if not.
#
proc find-executable-path {name} {
	# Ignore any parameters
	set name [lindex $name 0]
	# The empty string is never a valid executable
	if {$name ne ""} {
		foreach p [split-path] {
			dputs "Looking for $name in $p"
			set exec [file join $p $name]
			if {[file-isexec $exec]} {
				dputs "Found $name -> $exec"
				return $exec
			}
		}
	}
	return {}
}

# @find-executable name
#
# Searches the path for an executable with the given name.
# Note that the name may include some parameters, e.g. 'cc -mbig-endian',
# in which case the parameters are ignored.
# Returns 1 if found, or 0 if not.
#
proc find-executable {name} {
	if {[find-executable-path $name] eq {}} {
		return 0
	}
	return 1
}

# @find-an-executable ?-required? name ...
#
# Given a list of possible executable names,
# searches for one of these on the path.
#
# Returns the name found, or "" if none found.
# If the first parameter is '-required', an error is generated
# if no executable is found.
#
proc find-an-executable {args} {
	set required 0
	if {[lindex $args 0] eq "-required"} {
		set args [lrange $args 1 end]
		incr required
	}
	foreach name $args {
		if {[find-executable $name]} {
			return $name
		}
	}
	if {$required} {
		if {[llength $args] == 1} {
			user-error "failed to find: [join $args]"
		} else {
			user-error "failed to find one of: [join $args]"
		}
	}
	return ""
}

# @configlog msg
#
# Writes the given message to the configuration log, 'config.log'.
#
proc configlog {msg} {
	if {![info exists ::autosetup(logfh)]} {
		set ::autosetup(logfh) [open config.log w]
	}
	puts $::autosetup(logfh) $msg
}

# @msg-checking msg
#
# Writes the message with no newline to stdout.
#
proc msg-checking {msg} {
	if {$::autosetup(msg-quiet) == 0} {
		maybe-show-timestamp
		puts -nonewline $msg
		set ::autosetup(msg-checking) 1
	}
}

# @msg-result msg
#
# Writes the message to stdout.
#
proc msg-result {msg} {
	if {$::autosetup(msg-quiet) == 0} {
		maybe-show-timestamp
		puts $msg
		set ::autosetup(msg-checking) 0
		show-notices
	}
}

# @msg-quiet command ...
#
# 'msg-quiet' evaluates it's arguments as a command with output
# from 'msg-checking' and 'msg-result' suppressed.
#
# This is useful if a check needs to run a subcheck which isn't
# of interest to the user.
proc msg-quiet {args} {
	incr ::autosetup(msg-quiet)
	set rc [uplevel 1 $args]
	incr ::autosetup(msg-quiet) -1
	return $rc
}

# Will be overridden by 'use misc'
proc error-stacktrace {msg} {
	return $msg
}

proc error-location {msg} {
	return $msg
}

##################################################################
#
# Debugging output
#
proc dputs {msg} {
	if {$::autosetup(debug)} {
		puts $msg
	}
}

##################################################################
#
# User and system warnings and errors
#
# Usage errors such as wrong command line options

# @user-error msg
#
# Indicate incorrect usage to the user, including if required components
# or features are not found.
# 'autosetup' exits with a non-zero return code.
#
proc user-error {msg} {
	show-notices
	puts stderr "Error: $msg"
	puts stderr "Try: '[file tail $::autosetup(exe)] --help' for options"
	exit 1
}

# @user-notice msg
#
# Output the given message to stderr.
#
proc user-notice {msg} {
	lappend ::autosetup(notices) $msg
}

# Incorrect usage in the auto.def file. Identify the location.
proc autosetup-error {msg} {
	autosetup-full-error [error-location $msg]
}

# Like autosetup-error, except $msg is the full error message.
proc autosetup-full-error {msg} {
	show-notices
	puts stderr $msg
	exit 1
}

proc show-notices {} {
	if {$::autosetup(msg-checking)} {
		puts ""
		set ::autosetup(msg-checking) 0
	}
	flush stdout
	if {[info exists ::autosetup(notices)]} {
		puts stderr [join $::autosetup(notices) \n]
		unset ::autosetup(notices)
	}
}

proc maybe-show-timestamp {} {
	if {$::autosetup(msg-timing) && $::autosetup(msg-checking) == 0} {
		puts -nonewline [format {[%6.2f] } [expr {([clock millis] - $::autosetup(start)) % 10000 / 1000.0}]]
	}
}

# @autosetup-require-version required
#
# Checks the current version of 'autosetup' against '$required'.
# A fatal error is generated if the current version is less than that required.
#
proc autosetup-require-version {required} {
	if {[compare-versions $::autosetup(version) $required] < 0} {
		user-error "autosetup version $required is required, but this is $::autosetup(version)"
	}
}

proc autosetup_version {} {
	return "autosetup v$::autosetup(version)"
}

##################################################################
#
# Directory/path handling
#

proc realdir {dir} {
	set oldpwd [pwd]
	cd $dir
	set pwd [pwd]
	cd $oldpwd
	return $pwd
}

# Follow symlinks until we get to something which is not a symlink
proc realpath {path} {
	while {1} {
		if {[catch {
			set path [file readlink $path]
		}]} {
			# Not a link
			break
		}
	}
	return $path
}

# Convert absolute path, $path into a path relative
# to the given directory (or the current dir, if not given).
#
proc relative-path {path {pwd {}}} {
	set diff 0
	set same 0
	set newf {}
	set prefix {}
	set path [file-normalize $path]
	if {$pwd eq ""} {
		set pwd [pwd]
	} else {
		set pwd [file-normalize $pwd]
	}

	if {$path eq $pwd} {
		return .
	}

	# Try to make the filename relative to the current dir
	foreach p [split $pwd /] f [split $path /] {
		if {$p ne $f} {
			incr diff
		} elseif {!$diff} {
			incr same
		}
		if {$diff} {
			if {$p ne ""} {
				# Add .. for sibling or parent dir
				lappend prefix ..
			}
			if {$f ne ""} {
				lappend newf $f
			}
		}
	}
	if {$same == 1 || [llength $prefix] > 3} {
		return $path
	}

	file join [join $prefix /] [join $newf /]
}

# Add filename as a dependency to rerun autosetup
# The name will be normalised (converted to a full path)
#
proc autosetup_add_dep {filename} {
	lappend ::autosetup(deps) [file-normalize $filename]
}

##################################################################
#
# Library module support
#

# @use module ...
#
# Load the given library modules.
# e.g. 'use cc cc-shared'
#
# Note that module 'X' is implemented in either 'autosetup/X.tcl'
# or 'autosetup/X/init.tcl'
#
# The latter form is useful for a complex module which requires additional
# support file. In this form, '$::usedir' is set to the module directory
# when it is loaded.
#
proc use {args} {
	global autosetup libmodule modsource

	set dirs [list $autosetup(libdir)]
	if {[info exists autosetup(srcdir)]} {
		lappend dirs $autosetup(srcdir)/autosetup
	}
	foreach m $args {
		if {[info exists libmodule($m)]} {
			continue
		}
		set libmodule($m) 1

		if {[info exists modsource(${m}.tcl)]} {
			autosetup_load_module $m eval $modsource(${m}.tcl)
		} else {
			set locs [list ${m}.tcl ${m}/init.tcl]
			set found 0
			foreach dir $dirs {
				foreach loc $locs {
					set source $dir/$loc
					if {[file exists $source]} {
						incr found
						break
					}
				}
				if {$found} {
					break
				}
			}
			if {$found} {
				# For the convenience of the "use" source, point to the directory
				# it is being loaded from
				set ::usedir [file dirname $source]
				autosetup_load_module $m source $source
				autosetup_add_dep $source
			} else {
				autosetup-error "use: No such module: $m"
			}
		}
	}
}

proc autosetup_load_auto_modules {} {
	global autosetup modsource
	# First load any embedded auto modules
	foreach mod [array names modsource *.auto] {
		autosetup_load_module $mod eval $modsource($mod)
	}
	# Now any external auto modules
	foreach file [glob -nocomplain $autosetup(libdir)/*.auto $autosetup(libdir)/*/*.auto] {
		autosetup_load_module [file tail $file] source $file
	}
}

# Load module source in the global scope by executing the given command
proc autosetup_load_module {module args} {
	global autosetup
	set prev $autosetup(module)
	set autosetup(module) $module

	if {[catch [list uplevel #0 $args] msg opts] ni {0 2 3}} {
		autosetup-full-error [error-dump $msg $opts $::autosetup(debug)]
	}
	set autosetup(module) $prev
}

# Initial settings
set autosetup(exe) $::argv0
set autosetup(istcl) 1
set autosetup(start) [clock millis]
set autosetup(installed) 0
set autosetup(sysinstall) 0
set autosetup(msg-checking) 0
set autosetup(msg-quiet) 0
set autosetup(inittypes) {}
set autosetup(module) autosetup

# Embedded modules are inserted below here
set autosetup(installed) 1
set autosetup(sysinstall) 0
# ----- @module asciidoc-formatting.tcl -----

set modsource(asciidoc-formatting.tcl) {
# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module which provides text formatting
# asciidoc format

use formatting

proc para {text} {
    regsub -all "\[ \t\n\]+" [string trim $text] " "
}
proc title {text} {
    underline [para $text] =
    nl
}
proc p {text} {
    puts [para $text]
    nl
}
proc code {text} {
    foreach line [parse_code_block $text] {
        puts "    $line"
    }
    nl
}
proc codelines {lines} {
    foreach line $lines {
        puts "    $line"
    }
    nl
}
proc nl {} {
    puts ""
}
proc underline {text char} {
    regexp "^(\[ \t\]*)(.*)" $text -> indent words
    puts $text
    puts $indent[string repeat $char [string length $words]]
}
proc section {text} {
    underline "[para $text]" -
    nl
}
proc subsection {text} {
    underline "$text" ~
    nl
}
proc bullet {text} {
    puts "* [para $text]"
}
proc indent {text} {
    puts " :: "
    puts [para $text]
}
proc defn {first args} {
    set sep ""
    if {$first ne ""} {
        puts "${first}::"
    } else {
        puts " :: "
    }
    set defn [string trim [join $args \n]]
    regsub -all "\n\n" $defn "\n ::\n" defn
    puts $defn
}
}

# ----- @module formatting.tcl -----

set modsource(formatting.tcl) {
# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module which provides common text formatting

# This is designed for documentation which looks like:
# code {...}
# or
# code {
#    ...
#    ...
# }
# In the second case, we need to work out the indenting
# and strip it from all lines but preserve the remaining indenting.
# Note that all lines need to be indented with the same initial
# spaces/tabs.
#
# Returns a list of lines with the indenting removed.
#
proc parse_code_block {text} {
    # If the text begins with newline, take the following text,
    # otherwise just return the original
    if {![regexp "^\n(.*)" $text -> text]} {
        return [list [string trim $text]]
    }

    # And trip spaces off the end
    set text [string trimright $text]

    set min 100
    # Examine each line to determine the minimum indent
    foreach line [split $text \n] {
        if {$line eq ""} {
            # Ignore empty lines for the indent calculation
            continue
        }
        regexp "^(\[ \t\]*)" $line -> indent
        set len [string length $indent]
        if {$len < $min} {
            set min $len
        }
    }

    # Now make a list of lines with this indent removed
    set lines {}
    foreach line [split $text \n] {
        lappend lines [string range $line $min end]
    }

    # Return the result
    return $lines
}
}

# ----- @module getopt.tcl -----

set modsource(getopt.tcl) {
# Copyright (c) 2006 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Simple getopt module

# Parse everything out of the argv list which looks like an option
# Everything which doesn't look like an option, or is after --, is left unchanged
# Understands --enable-xxx as a synonym for --xxx to enable the boolean option xxx.
# Understands --disable-xxx to disable the boolean option xxx.
#
# The returned value is a dictionary keyed by option name
# Each value is a list of {type value} ... where type is "bool" or "str".
# The value for a boolean option is 0 or 1. The value of a string option is the value given.
proc getopt {argvname} {
	upvar $argvname argv
	set nargv {}

	set opts {}

	for {set i 0} {$i < [llength $argv]} {incr i} {
		set arg [lindex $argv $i]

		#dputs arg=$arg

		if {$arg eq "--"} {
			# End of options
			incr i
			lappend nargv {*}[lrange $argv $i end]
			break
		}

		if {[regexp {^--([^=][^=]+)=(.*)$} $arg -> name value]} {
			# --name=value
			dict lappend opts $name [list str $value]
		} elseif {[regexp {^--(enable-|disable-)?([^=]*)$} $arg -> prefix name]} {
			if {$prefix in {enable- ""}} {
				set value 1
			} else {
				set value 0
			}
			dict lappend opts $name [list bool $value]
		} else {
			lappend nargv $arg
		}
	}

	#puts "getopt: argv=[join $argv] => [join $nargv]"
	#array set getopt $opts
	#parray getopt

	set argv $nargv

	return $opts
}
}

# ----- @module help.tcl -----

set modsource(help.tcl) {
# Copyright (c) 2010 WorkWare Systems http://workware.net.au/
# All rights reserved

# Module which provides usage, help and the command reference

proc autosetup_help {what} {
    use_pager

    puts "Usage: [file tail $::autosetup(exe)] \[options\] \[settings\]\n"
    puts "This is [autosetup_version], a build environment \"autoconfigurator\""
    puts "See the documentation online at http://msteveb.github.io/autosetup/\n"

    if {$what in {all local}} {
        # Need to load auto.def now
        if {[file exists $::autosetup(autodef)]} {
            # Load auto.def as module "auto.def"
            autosetup_load_module auto.def source $::autosetup(autodef)
        }
        if {$what eq "all"} {
            set what *
        } else {
            set what auto.def
        }
    } else {
        use $what
        puts "Options for module $what:"
    }
    options-show $what
    exit 0
}

proc autosetup_show_license {} {
    global modsource autosetup
    use_pager

    if {[info exists modsource(LICENSE)]} {
        puts $modsource(LICENSE)
        return
    }
    foreach dir [list $autosetup(libdir) $autosetup(srcdir)] {
        set path [file join $dir LICENSE]
        if {[file exists $path]} {
            puts [readfile $path]
            return
        }
    }
    puts "LICENSE not found"
}

# If not already paged and stdout is a tty, pipe the output through the pager
# This is done by reinvoking autosetup with --nopager added
proc use_pager {} {
    if {![opt-bool nopager] && [getenv PAGER ""] ne "" && [isatty? stdin] && [isatty? stdout]} {
        if {[catch {
            exec [info nameofexecutable] $::argv0 --nopager {*}$::argv |& {*}[getenv PAGER] >@stdout <@stdin 2>@stderr
        } msg opts] == 1} {
            if {[dict get $opts -errorcode] eq "NONE"} {
                # an internal/exec error
                puts stderr $msg
                exit 1
            }
        }
        exit 0
    }
}

# Outputs the autosetup references in one of several formats
proc autosetup_reference {{type text}} {

    use_pager

    switch -glob -- $type {
        wiki {use wiki-formatting}
        ascii* {use asciidoc-formatting}
        md - markdown {use markdown-formatting}
        default {use text-formatting}
    }

    title "[autosetup_version] -- Command Reference"

    section {Introduction}

    p {
        See http://msteveb.github.com/autosetup/ for the online documentation for 'autosetup'
    }

    p {
        'autosetup' provides a number of built-in commands which
        are documented below. These may be used from 'auto.def' to test
        for features, define variables, create files from templates and
        other similar actions.
    }

    automf_command_reference

    exit 0
}

proc autosetup_output_block {type lines} {
    if {[llength $lines]} {
        switch $type {
            section {
                section $lines
            }
            subsection {
                subsection $lines
            }
            code {
                codelines $lines
            }
            p {
                p [join $lines]
            }
            list {
                foreach line $lines {
                    bullet $line
                }
                nl
            }
        }
    }
}

# Generate a command reference from inline documentation
proc automf_command_reference {} {
    lappend files $::autosetup(prog)
    lappend files {*}[lsort [glob -nocomplain $::autosetup(libdir)/*.tcl]]

    # We want to process all non-module files before module files
    # and then modules in alphabetical order.
    # So examine all files and extract docs into doc($modulename) and doc(_core_)
    #
    # Each entry is a list of {type data} where $type is one of: section, subsection, code, list, p
    # and $data is a string for section, subsection or a list of text lines for other types.

    # XXX: Should commands be in alphabetical order too? Currently they are in file order.

    set doc(_core_) {}
    lappend doc(_core_) [list section "Core Commands"]

    foreach file $files {
        set modulename [file rootname [file tail $file]]
        set current _core_
        set f [open $file]
        while {![eof $f]} {
            set line [gets $f]

            # Find embedded module names
            if {[regexp {^#.*@module ([^ ]*)} $line -> modulename]} {
                continue
            }

            # Find lines starting with "# @*" and continuing through the remaining comment lines
            if {![regexp {^# @(.*)} $line -> cmd]} {
                continue
            }

            # Synopsis or command?
            if {$cmd eq "synopsis:"} {
                set current $modulename
                lappend doc($current) [list section "Module: $modulename"]
            } else {
                lappend doc($current) [list subsection $cmd]
            }

            set lines {}
            set type p

            # Now the description
            while {![eof $f]} {
                set line [gets $f]

                if {![regexp {^#(#)? ?(.*)} $line -> hash cmd]} {
                    break
                }
                if {$hash eq "#"} {
                    set t code
                } elseif {[regexp {^- (.*)} $cmd -> cmd]} {
                    set t list
                } else {
                    set t p
                }

                #puts "hash=$hash, oldhash=$oldhash, lines=[llength $lines], cmd=$cmd"

                if {$t ne $type || $cmd eq ""} {
                    # Finish the current block
                    lappend doc($current) [list $type $lines]
                    set lines {}
                    set type $t
                }
                if {$cmd ne ""} {
                    lappend lines $cmd
                }
            }

            lappend doc($current) [list $type $lines]
        }
        close $f
    }

    # Now format and output the results

    # _core_ will sort first
    foreach module [lsort [array names doc]] {
        foreach item $doc($module) {
            autosetup_output_block {*}$item
        }
    }
}
}

# ----- @module init.tcl -----

set modsource(init.tcl) {
# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module to help create auto.def and configure

proc autosetup_init {type} {
	set help 0
	if {$type in {? help}} {
		incr help
	} elseif {![dict exists $::autosetup(inittypes) $type]} {
		puts "Unknown type, --init=$type"
		incr help
	}
	if {$help} {
		puts "Use one of the following types (e.g. --init=make)\n"
		foreach type [lsort [dict keys $::autosetup(inittypes)]] {
			lassign [dict get $::autosetup(inittypes) $type] desc
			# XXX: Use the options-show code to wrap the description
			puts [format "%-10s %s" $type $desc]
		}
		return
	}
	lassign [dict get $::autosetup(inittypes) $type] desc script

	puts "Initialising $type: $desc\n"

	# All initialisations happens in the top level srcdir
	cd $::autosetup(srcdir)

	uplevel #0 $script
}

proc autosetup_add_init_type {type desc script} {
	dict set ::autosetup(inittypes) $type [list $desc $script]
}

# This is for in creating build-system init scripts
#
# If the file doesn't exist, create it containing $contents
# If the file does exist, only overwrite if --force is specified.
#
proc autosetup_check_create {filename contents} {
	if {[file exists $filename]} {
		if {!$::autosetup(force)} {
			puts "I see $filename already exists."
			return
		} else {
			puts "I will overwrite the existing $filename because you used --force."
		}
	} else {
		puts "I don't see $filename, so I will create it."
	}
	writefile $filename $contents
}
}

# ----- @module install.tcl -----

set modsource(install.tcl) {
# Copyright (c) 2006-2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module which can install autosetup

# autosetup(installed)=1 means that autosetup is not running from source
# autosetup(sysinstall)=1 means that autosetup is running from a sysinstall version
# shared=1 means that we are trying to do a sysinstall. This is only possible from the development source.

proc autosetup_install {dir {shared 0}} {
	global autosetup
	if {$shared} {
		if {$autosetup(installed) || $autosetup(sysinstall)} {
			user-error "Can only --sysinstall from development sources"
		}
	} elseif {$autosetup(installed) && !$autosetup(sysinstall)} {
		user-error "Can't --install from project install"
	}

	if {$autosetup(sysinstall)} {
		# This is the sysinstall version, so install just uses references
		cd $dir

		puts "[autosetup_version] creating configure to use system-installed autosetup"
		autosetup_create_configure 1
		puts "Creating autosetup/README.autosetup"
		file mkdir autosetup
		autosetup_install_readme autosetup/README.autosetup 1
		return
	}

	if {[catch {
		if {$shared} {
			set target $dir/bin/autosetup
			set installedas $target
		} else {
			if {$dir eq "."} {
				set installedas autosetup
			} else {
				set installedas $dir/autosetup
			}
			cd $dir
			file mkdir autosetup
			set target autosetup/autosetup
		}
		set targetdir [file dirname $target]
		file mkdir $targetdir

		set f [open $target w]

		set publicmodules {}

		# First the main script, but only up until "CUT HERE"
		set in [open $autosetup(dir)/autosetup]
		while {[gets $in buf] >= 0} {
			if {$buf ne "##-- CUT HERE --##"} {
				puts $f $buf
				continue
			}

			# Insert the static modules here
			# i.e. those which don't contain @synopsis:
			# All modules are inserted if $shared is set
			puts $f "set autosetup(installed) 1"
			puts $f "set autosetup(sysinstall) $shared"
			foreach file [lsort [glob $autosetup(libdir)/*.{tcl,auto}]] {
				set modname [file tail $file]
				set ext [file ext $modname]
				set buf [readfile $file]
				if {!$shared} {
					if {$ext eq ".auto" || [string match "*\n# @synopsis:*" $buf]} {
						lappend publicmodules $file
						continue
					}
				}
				dputs "install: importing lib/[file tail $file]"
				puts $f "# ----- @module $modname -----"
				puts $f "\nset modsource($modname) \{"
				puts $f $buf
				puts $f "\}\n"
			}
			if {$shared} {
				foreach {srcname destname} [list $autosetup(libdir)/README.autosetup-lib README.autosetup \
						$autosetup(srcdir)/LICENSE LICENSE] {
					dputs "install: importing $srcname as $destname"
					puts $f "\nset modsource($destname) \\\n[list [readfile $srcname]\n]\n"
				}
			}
		}
		close $in
		close $f
		catch {exec chmod 755 $target}

		set installfiles {autosetup-config.guess autosetup-config.sub autosetup-test-tclsh}
		set removefiles {}

		if {!$shared} {
			autosetup_install_readme $targetdir/README.autosetup 0

			# Install public modules
			foreach file $publicmodules {
				set tail [file tail $file]
				autosetup_install_file $file $targetdir/$tail
			}
			lappend installfiles jimsh0.c autosetup-find-tclsh LICENSE
			lappend removefiles config.guess config.sub test-tclsh find-tclsh
		} else {
			lappend installfiles {sys-find-tclsh autosetup-find-tclsh}
		}

		# Install support files
		foreach fileinfo $installfiles {
			if {[llength $fileinfo] == 2} {
				lassign $fileinfo source dest
			} else {
				lassign $fileinfo source
				set dest $source
			}
			autosetup_install_file $autosetup(dir)/$source $targetdir/$dest
		}

		# Remove obsolete files
		foreach file $removefiles {
			if {[file exists $targetdir/$file]} {
				file delete $targetdir/$file
			}
		}
	} error]} {
		user-error "Failed to install autosetup: $error"
	}
	if {$shared} {
		set type "system"
	} else {
		set type "local"
	}
	puts "Installed $type [autosetup_version] to $installedas"

	if {!$shared} {
		# Now create 'configure' if necessary
		autosetup_create_configure 0
	}
}

proc autosetup_create_configure {shared} {
	if {[file exists configure]} {
		if {!$::autosetup(force)} {
			# Could this be an autosetup configure?
			if {![string match "*\nWRAPPER=*" [readfile configure]]} {
				puts "I see configure, but not created by autosetup, so I won't overwrite it."
				puts "Remove it or use --force to overwrite."
				return
			}
		} else {
			puts "I will overwrite the existing configure because you used --force."
		}
	} else {
		puts "I don't see configure, so I will create it."
	}
	if {$shared} {
		writefile configure \
{#!/bin/sh
WRAPPER="$0"; export WRAPPER; "autosetup" "$@"
}
	} else {
		writefile configure \
{#!/bin/sh
dir="`dirname "$0"`/autosetup"
WRAPPER="$0"; export WRAPPER; exec "`"$dir/autosetup-find-tclsh"`" "$dir/autosetup" "$@"
}
	}
	catch {exec chmod 755 configure}
}

# Append the contents of $file to filehandle $f
proc autosetup_install_append {f file} {
	dputs "install: include $file"
	set in [open $file]
	puts $f [read $in]
	close $in
}

proc autosetup_install_file {source target} {
	dputs "install: $source => $target"
	if {![file exists $source]} {
		error "Missing installation file '$source'"
	}
	writefile $target [readfile $source]\n
	# If possible, copy the file mode
	file stat $source stat
	set mode [format %o [expr {$stat(mode) & 0x1ff}]]
	catch {exec chmod $mode $target}
}

proc autosetup_install_readme {target sysinstall} {
	set readme "README.autosetup created by [autosetup_version]\n\n"
	if {$sysinstall} {
		append readme \
{This is the autosetup directory for a system install of autosetup.
Loadable modules can be added here.
}
	} else {
		append readme \
{This is the autosetup directory for a local install of autosetup.
It contains autosetup, support files and loadable modules.
}
}

	append readme {
*.tcl files in this directory are optional modules which
can be loaded with the 'use' directive.

*.auto files in this directory are auto-loaded.

For more information, see http://msteveb.github.io/autosetup/
}
	dputs "install: autosetup/README.autosetup"
	writefile $target $readme
}
}

# ----- @module markdown-formatting.tcl -----

set modsource(markdown-formatting.tcl) {
# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module which provides text formatting
# markdown format (kramdown syntax)

use formatting

proc para {text} {
    regsub -all "\[ \t\n\]+" [string trim $text] " " text
    regsub -all {([^a-zA-Z])'([^']*)'} $text {\1**`\2`**} text
    regsub -all {^'([^']*)'} $text {**`\1`**} text
    regsub -all {(http[^ \t\n]*)} $text {[\1](\1)} text
    return $text
}
proc title {text} {
    underline [para $text] =
    nl
}
proc p {text} {
    puts [para $text]
    nl
}
proc codelines {lines} {
    puts "~~~~~~~~~~~~"
    foreach line $lines {
        puts $line
    }
    puts "~~~~~~~~~~~~"
    nl
}
proc code {text} {
    puts "~~~~~~~~~~~~"
    foreach line [parse_code_block $text] {
        puts $line
    }
    puts "~~~~~~~~~~~~"
    nl
}
proc nl {} {
    puts ""
}
proc underline {text char} {
    regexp "^(\[ \t\]*)(.*)" $text -> indent words
    puts $text
    puts $indent[string repeat $char [string length $words]]
}
proc section {text} {
    underline "[para $text]" -
    nl
}
proc subsection {text} {
    puts "### `$text`"
    nl
}
proc bullet {text} {
    puts "* [para $text]"
}
proc defn {first args} {
    puts "^"
    set defn [string trim [join $args \n]]
    if {$first ne ""} {
        puts "**${first}**"
        puts -nonewline ": "
        regsub -all "\n\n" $defn "\n: " defn
    }
    puts "$defn"
}
}

# ----- @module misc.tcl -----

set modsource(misc.tcl) {
# Copyright (c) 2007-2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module containing misc procs useful to modules
# Largely for platform compatibility

set autosetup(istcl) [info exists ::tcl_library]
set autosetup(iswin) [string equal windows $tcl_platform(platform)]

if {$autosetup(iswin)} {
	# mingw/windows separates $PATH with semicolons
	# and doesn't have an executable bit
	proc split-path {} {
		split [getenv PATH .] {;}
	}
	proc file-isexec {exec} {
		# Basic test for windows. We ignore .bat
		if {[file isfile $exec] || [file isfile $exec.exe]} {
			return 1
		}
		return 0
	}
} else {
	# unix separates $PATH with colons and has and executable bit
	proc split-path {} {
		split [getenv PATH .] :
	}
	proc file-isexec {exec} {
		file executable $exec
	}
}

# Assume that exec can return stdout and stderr
proc exec-with-stderr {args} {
	exec {*}$args 2>@1
}

if {$autosetup(istcl)} {
	# Tcl doesn't have the env command
	proc getenv {name args} {
		if {[info exists ::env($name)]} {
			return $::env($name)
		}
		if {[llength $args]} {
			return [lindex $args 0]
		}
		return -code error "environment variable \"$name\" does not exist"
	}
	proc isatty? {channel} {
		dict exists [fconfigure $channel] -xchar
	}
} else {
	if {$autosetup(iswin)} {
		# On Windows, backslash convert all environment variables
		# (Assume that Tcl does this for us)
		proc getenv {name args} {
			string map {\\ /} [env $name {*}$args]
		}
	} else {
		# Jim on unix is simple
		alias getenv env
	}
	proc isatty? {channel} {
		set tty 0
		catch {
			# isatty is a recent addition to Jim Tcl
			set tty [$channel isatty]
		}
		return $tty
	}
}

# In case 'file normalize' doesn't exist
#
proc file-normalize {path} {
	if {[catch {file normalize $path} result]} {
		if {$path eq ""} {
			return ""
		}
		set oldpwd [pwd]
		if {[file isdir $path]} {
			cd $path
			set result [pwd]
		} else {
			cd [file dirname $path]
			set result [file join [pwd] [file tail $path]]
		}
		cd $oldpwd
	}
	return $result
}

# If everything is working properly, the only errors which occur
# should be generated in user code (e.g. auto.def).
# By default, we only want to show the error location in user code.
# We use [info frame] to achieve this, but it works differently on Tcl and Jim.
#
# This is designed to be called for incorrect usage in auto.def, via autosetup-error
#
proc error-location {msg} {
	if {$::autosetup(debug)} {
		return -code error $msg
	}
	# Search back through the stack trace for the first error in a .def file
	for {set i 1} {$i < [info level]} {incr i} {
		if {$::autosetup(istcl)} {
			array set info [info frame -$i]
		} else {
			lassign [info frame -$i] info(caller) info(file) info(line)
		}
		if {[string match *.def $info(file)]} {
			return "[relative-path $info(file)]:$info(line): Error: $msg"
		}
		#puts "Skipping $info(file):$info(line)"
	}
	return $msg
}

# If everything is working properly, the only errors which occur
# should be generated in user code (e.g. auto.def).
# By default, we only want to show the error location in user code.
# We use [info frame] to achieve this, but it works differently on Tcl and Jim.
#
# This is designed to be called for incorrect usage in auto.def, via autosetup-error
#
proc error-stacktrace {msg} {
	if {$::autosetup(debug)} {
		return -code error $msg
	}
	# Search back through the stack trace for the first error in a .def file
	for {set i 1} {$i < [info level]} {incr i} {
		if {$::autosetup(istcl)} {
			array set info [info frame -$i]
		} else {
			lassign [info frame -$i] info(caller) info(file) info(line)
		}
		if {[string match *.def $info(file)]} {
			return "[relative-path $info(file)]:$info(line): Error: $msg"
		}
		#puts "Skipping $info(file):$info(line)"
	}
	return $msg
}

# Given the return from [catch {...} msg opts], returns an appropriate
# error message. A nice one for Jim and a less-nice one for Tcl.
# If 'fulltrace' is set, a full stack trace is provided.
# Otherwise a simple message is provided.
#
# This is designed for developer errors, e.g. in module code or auto.def code
#
#
proc error-dump {msg opts fulltrace} {
	if {$::autosetup(istcl)} {
		if {$fulltrace} {
			return "Error: [dict get $opts -errorinfo]"
		} else {
			return "Error: $msg"
		}
	} else {
		lassign $opts(-errorinfo) p f l
		if {$f ne ""} {
			set result "$f:$l: Error: "
		}
		append result "$msg\n"
		if {$fulltrace} {
			append result [stackdump $opts(-errorinfo)]
		}

		# Remove the trailing newline
		string trim $result
	}
}
}

# ----- @module text-formatting.tcl -----

set modsource(text-formatting.tcl) {
# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module which provides text formatting

use formatting

proc wordwrap {text length {firstprefix ""} {nextprefix ""}} {
	set len 0
	set space $firstprefix

	foreach word [split $text] {
		set word [string trim $word]
		if {$word eq ""} {
			continue
		}
		if {[info exists partial]} {
			append partial " " $word
			if {[string first $quote $word] < 0} {
				# Haven't found end of quoted word
				continue
			}
			# Finished quoted word
			set word $partial
			unset partial
			unset quote
		} else {
			set quote [string index $word 0]
			if {$quote in {' *}} {
				if {[string first $quote $word 1] < 0} {
					# Haven't found end of quoted word
					# Not a whole word.
					set first [string index $word 0]
					# Start of quoted word
					set partial $word
					continue
				}
			}
		}

		if {$len && [string length $space$word] + $len >= $length} {
			puts ""
			set len 0
			set space $nextprefix
		}
		incr len [string length $space$word]

		# Use man-page conventions for highlighting 'quoted' and *quoted*
		# single words.
		# Use x^Hx for *bold* and _^Hx for 'underline'.
		#
		# less and more will both understand this.
		# Pipe through 'col -b' to remove them.
		if {[regexp {^'(.*)'(.*)} $word -> quoted after]} {
			set quoted [string map {~ " "} $quoted]
			regsub -all . $quoted "&\b&" quoted
			set word $quoted$after
		} elseif {[regexp {^[*](.*)[*](.*)} $word -> quoted after]} {
			set quoted [string map {~ " "} $quoted]
			regsub -all . $quoted "_\b&" quoted
			set word $quoted$after
		}
		puts -nonewline $space$word
		set space " "
	}
	if {[info exists partial]} {
		# Missing end of quote
		puts -nonewline $space$partial
	}
	if {$len} {
		puts ""
	}
}
proc title {text} {
	underline [string trim $text] =
	nl
}
proc p {text} {
	wordwrap $text 80
	nl
}
proc codelines {lines} {
	foreach line $lines {
		puts "	  $line"
	}
	nl
}
proc nl {} {
	puts ""
}
proc underline {text char} {
	regexp "^(\[ \t\]*)(.*)" $text -> indent words
	puts $text
	puts $indent[string repeat $char [string length $words]]
}
proc section {text} {
	underline "[string trim $text]" -
	nl
}
proc subsection {text} {
	underline "$text" ~
	nl
}
proc bullet {text} {
	wordwrap $text 76 "	 * " "	  "
}
proc indent {text} {
	wordwrap $text 76 "	   " "	  "
}
proc defn {first args} {
	if {$first ne ""} {
		underline "	   $first" ~
	}
	foreach p $args {
		if {$p ne ""} {
			indent $p
		}
	}
}
}

# ----- @module util.tcl -----

set modsource(util.tcl) {
# Copyright (c) 2012 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module which contains miscellaneous utility functions

# @compare-versions version1 version2
#
# Versions are of the form 'a.b.c' (may be any number of numeric components)
#
# Compares the two versions and returns:
## -1 if v1 < v2
##  0 if v1 == v2
##  1 if v1 > v2
#
# If one version has fewer components than the other, 0 is substituted to the right. e.g.
## 0.2   <  0.3
## 0.2.5 >  0.2
## 1.1   == 1.1.0
#
proc compare-versions {v1 v2} {
	foreach c1 [split $v1 .] c2 [split $v2 .] {
		if {$c1 eq ""} {
			set c1 0
		}
		if {$c2 eq ""} {
			set c2 0
		}
		if {$c1 < $c2} {
			return -1
		}
		if {$c1 > $c2} {
			return 1
		}
	}
	return 0
}

# @suffix suf list
#
# Takes a list and returns a new list with '$suf' appended
# to each element
#
## suffix .c {a b c} => {a.c b.c c.c}
#
proc suffix {suf list} {
	set result {}
	foreach p $list {
		lappend result $p$suf
	}
	return $result
}

# @prefix pre list
#
# Takes a list and returns a new list with '$pre' prepended
# to each element
#
## prefix jim- {a.c b.c} => {jim-a.c jim-b.c}
#
proc prefix {pre list} {
	set result {}
	foreach p $list {
		lappend result $pre$p
	}
	return $result
}

# @lpop list
#
# Removes the last entry from the given list and returns it.
proc lpop {listname} {
	upvar $listname list
	set val [lindex $list end]
	set list [lrange $list 0 end-1]
	return $val
}
}

# ----- @module wiki-formatting.tcl -----

set modsource(wiki-formatting.tcl) {
# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Module which provides text formatting
# wiki.tcl.tk format output

use formatting

proc joinlines {text} {
    set lines {}
    foreach l [split [string trim $text] \n] {
        lappend lines [string trim $l]
    }
    join $lines
}
proc p {text} {
    puts [joinlines $text]
    puts ""
}
proc title {text} {
    puts "*** [joinlines $text] ***"
    puts ""
}
proc codelines {lines} {
    puts "======"
    foreach line $lines {
        puts "    $line"
    }
    puts "======"
}
proc code {text} {
    puts "======"
    foreach line [parse_code_block $text] {
        puts "    $line"
    }
    puts "======"
}
proc nl {} {
}
proc section {text} {
    puts "'''$text'''"
    puts ""
}
proc subsection {text} {
    puts "''$text''"
    puts ""
}
proc bullet {text} {
    puts "   * [joinlines $text]"
}
proc indent {text} {
    puts "    :    [joinlines $text]"
}
proc defn {first args} {
    if {$first ne ""} {
        indent '''$first'''
    }

    foreach p $args {
        p $p
    }
}
}


##################################################################
#
# Entry/Exit
#
if {$autosetup(debug)} {
	main $argv
}
if {[catch {main $argv} msg opts] == 1} {
	show-notices
	autosetup-full-error [error-dump $msg $opts $autosetup(debug)]
	if {!$autosetup(debug)} {
		puts stderr "Try: '[file tail $autosetup(exe)] --debug' for a full stack trace"
	}
	exit 1
}

Deleted autosetup/autosetup-config.guess.

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#! /bin/sh
# Attempt to guess a canonical system name.
#   Copyright 1992-2021 Free Software Foundation, Inc.

# shellcheck disable=SC2006,SC2268 # see below for rationale

timestamp='2021-06-03'

# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <https://www.gnu.org/licenses/>.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that
# program.  This Exception is an additional permission under section 7
# of the GNU General Public License, version 3 ("GPLv3").
#
# Originally written by Per Bothner; maintained since 2000 by Ben Elliston.
#
# You can get the latest version of this script from:
# https://git.savannah.gnu.org/cgit/config.git/plain/config.guess
#
# Please send patches to <config-patches@gnu.org>.


# The "shellcheck disable" line above the timestamp inhibits complaints
# about features and limitations of the classic Bourne shell that were
# superseded or lifted in POSIX.  However, this script identifies a wide
# variety of pre-POSIX systems that do not have POSIX shells at all, and
# even some reasonably current systems (Solaris 10 as case-in-point) still
# have a pre-POSIX /bin/sh.


me=`echo "$0" | sed -e 's,.*/,,'`

usage="\
Usage: $0 [OPTION]

Output the configuration name of the system \`$me' is run on.

Options:
  -h, --help         print this help, then exit
  -t, --time-stamp   print date of last modification, then exit
  -v, --version      print version number, then exit

Report bugs and patches to <config-patches@gnu.org>."

version="\
GNU config.guess ($timestamp)

Originally written by Per Bothner.
Copyright 1992-2021 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."

help="
Try \`$me --help' for more information."

# Parse command line
while test $# -gt 0 ; do
  case $1 in
    --time-stamp | --time* | -t )
       echo "$timestamp" ; exit ;;
    --version | -v )
       echo "$version" ; exit ;;
    --help | --h* | -h )
       echo "$usage"; exit ;;
    -- )     # Stop option processing
       shift; break ;;
    - )	# Use stdin as input.
       break ;;
    -* )
       echo "$me: invalid option $1$help" >&2
       exit 1 ;;
    * )
       break ;;
  esac
done

if test $# != 0; then
  echo "$me: too many arguments$help" >&2
  exit 1
fi

# Just in case it came from the environment.
GUESS=

# CC_FOR_BUILD -- compiler used by this script. Note that the use of a
# compiler to aid in system detection is discouraged as it requires
# temporary files to be created and, as you can see below, it is a
# headache to deal with in a portable fashion.

# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
# use `HOST_CC' if defined, but it is deprecated.

# Portable tmp directory creation inspired by the Autoconf team.

tmp=
# shellcheck disable=SC2172
trap 'test -z "$tmp" || rm -fr "$tmp"' 0 1 2 13 15

set_cc_for_build() {
    # prevent multiple calls if $tmp is already set
    test "$tmp" && return 0
    : "${TMPDIR=/tmp}"
    # shellcheck disable=SC2039,SC3028
    { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
	{ test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir "$tmp" 2>/dev/null) ; } ||
	{ tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir "$tmp" 2>/dev/null) && echo "Warning: creating insecure temp directory" >&2 ; } ||
	{ echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; }
    dummy=$tmp/dummy
    case ${CC_FOR_BUILD-},${HOST_CC-},${CC-} in
	,,)    echo "int x;" > "$dummy.c"
	       for driver in cc gcc c89 c99 ; do
		   if ($driver -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then
		       CC_FOR_BUILD=$driver
		       break
		   fi
	       done
	       if test x"$CC_FOR_BUILD" = x ; then
		   CC_FOR_BUILD=no_compiler_found
	       fi
	       ;;
	,,*)   CC_FOR_BUILD=$CC ;;
	,*,*)  CC_FOR_BUILD=$HOST_CC ;;
    esac
}

# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
# (ghazi@noc.rutgers.edu 1994-08-24)
if test -f /.attbin/uname ; then
	PATH=$PATH:/.attbin ; export PATH
fi

UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown
UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown

case $UNAME_SYSTEM in
Linux|GNU|GNU/*)
	LIBC=unknown

	set_cc_for_build
	cat <<-EOF > "$dummy.c"
	#include <features.h>
	#if defined(__UCLIBC__)
	LIBC=uclibc
	#elif defined(__dietlibc__)
	LIBC=dietlibc
	#elif defined(__GLIBC__)
	LIBC=gnu
	#else
	#include <stdarg.h>
	/* First heuristic to detect musl libc.  */
	#ifdef __DEFINED_va_list
	LIBC=musl
	#endif
	#endif
	EOF
	cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`
	eval "$cc_set_libc"

	# Second heuristic to detect musl libc.
	if [ "$LIBC" = unknown ] &&
	   command -v ldd >/dev/null &&
	   ldd --version 2>&1 | grep -q ^musl; then
		LIBC=musl
	fi

	# If the system lacks a compiler, then just pick glibc.
	# We could probably try harder.
	if [ "$LIBC" = unknown ]; then
		LIBC=gnu
	fi
	;;
esac

# Note: order is significant - the case branches are not exclusive.

case $UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION in
    *:NetBSD:*:*)
	# NetBSD (nbsd) targets should (where applicable) match one or
	# more of the tuples: *-*-netbsdelf*, *-*-netbsdaout*,
	# *-*-netbsdecoff* and *-*-netbsd*.  For targets that recently
	# switched to ELF, *-*-netbsd* would select the old
	# object file format.  This provides both forward
	# compatibility and a consistent mechanism for selecting the
	# object file format.
	#
	# Note: NetBSD doesn't particularly care about the vendor
	# portion of the name.  We always set it to "unknown".
	UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \
	    /sbin/sysctl -n hw.machine_arch 2>/dev/null || \
	    /usr/sbin/sysctl -n hw.machine_arch 2>/dev/null || \
	    echo unknown)`
	case $UNAME_MACHINE_ARCH in
	    aarch64eb) machine=aarch64_be-unknown ;;
	    armeb) machine=armeb-unknown ;;
	    arm*) machine=arm-unknown ;;
	    sh3el) machine=shl-unknown ;;
	    sh3eb) machine=sh-unknown ;;
	    sh5el) machine=sh5le-unknown ;;
	    earmv*)
		arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 's,^e\(armv[0-9]\).*$,\1,'`
		endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 's,^.*\(eb\)$,\1,p'`
		machine=${arch}${endian}-unknown
		;;
	    *) machine=$UNAME_MACHINE_ARCH-unknown ;;
	esac
	# The Operating System including object format, if it has switched
	# to ELF recently (or will in the future) and ABI.
	case $UNAME_MACHINE_ARCH in
	    earm*)
		os=netbsdelf
		;;
	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
		set_cc_for_build
		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
			| grep -q __ELF__
		then
		    # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
		    # Return netbsd for either.  FIX?
		    os=netbsd
		else
		    os=netbsdelf
		fi
		;;
	    *)
		os=netbsd
		;;
	esac
	# Determine ABI tags.
	case $UNAME_MACHINE_ARCH in
	    earm*)
		expr='s/^earmv[0-9]/-eabi/;s/eb$//'
		abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"`
		;;
	esac
	# The OS release
	# Debian GNU/NetBSD machines have a different userland, and
	# thus, need a distinct triplet. However, they do not need
	# kernel version information, so it can be replaced with a
	# suitable tag, in the style of linux-gnu.
	case $UNAME_VERSION in
	    Debian*)
		release='-gnu'
		;;
	    *)
		release=`echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. -f1,2`
		;;
	esac
	# Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
	# contains redundant information, the shorter form:
	# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
	GUESS=$machine-${os}${release}${abi-}
	;;
    *:Bitrig:*:*)
	UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'`
	GUESS=$UNAME_MACHINE_ARCH-unknown-bitrig$UNAME_RELEASE
	;;
    *:OpenBSD:*:*)
	UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
	GUESS=$UNAME_MACHINE_ARCH-unknown-openbsd$UNAME_RELEASE
	;;
    *:SecBSD:*:*)
	UNAME_MACHINE_ARCH=`arch | sed 's/SecBSD.//'`
	GUESS=$UNAME_MACHINE_ARCH-unknown-secbsd$UNAME_RELEASE
	;;
    *:LibertyBSD:*:*)
	UNAME_MACHINE_ARCH=`arch | sed 's/^.*BSD\.//'`
	GUESS=$UNAME_MACHINE_ARCH-unknown-libertybsd$UNAME_RELEASE
	;;
    *:MidnightBSD:*:*)
	GUESS=$UNAME_MACHINE-unknown-midnightbsd$UNAME_RELEASE
	;;
    *:ekkoBSD:*:*)
	GUESS=$UNAME_MACHINE-unknown-ekkobsd$UNAME_RELEASE
	;;
    *:SolidBSD:*:*)
	GUESS=$UNAME_MACHINE-unknown-solidbsd$UNAME_RELEASE
	;;
    *:OS108:*:*)
	GUESS=$UNAME_MACHINE-unknown-os108_$UNAME_RELEASE
	;;
    macppc:MirBSD:*:*)
	GUESS=powerpc-unknown-mirbsd$UNAME_RELEASE
	;;
    *:MirBSD:*:*)
	GUESS=$UNAME_MACHINE-unknown-mirbsd$UNAME_RELEASE
	;;
    *:Sortix:*:*)
	GUESS=$UNAME_MACHINE-unknown-sortix
	;;
    *:Twizzler:*:*)
	GUESS=$UNAME_MACHINE-unknown-twizzler
	;;
    *:Redox:*:*)
	GUESS=$UNAME_MACHINE-unknown-redox
	;;
    mips:OSF1:*.*)
	GUESS=mips-dec-osf1
	;;
    alpha:OSF1:*:*)
	# Reset EXIT trap before exiting to avoid spurious non-zero exit code.
	trap '' 0
	case $UNAME_RELEASE in
	*4.0)
		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
		;;
	*5.*)
		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $4}'`
		;;
	esac
	# According to Compaq, /usr/sbin/psrinfo has been available on
	# OSF/1 and Tru64 systems produced since 1995.  I hope that
	# covers most systems running today.  This code pipes the CPU
	# types through head -n 1, so we only detect the type of CPU 0.
	ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha \(.*\) processor.*$/\1/p' | head -n 1`
	case $ALPHA_CPU_TYPE in
	    "EV4 (21064)")
		UNAME_MACHINE=alpha ;;
	    "EV4.5 (21064)")
		UNAME_MACHINE=alpha ;;
	    "LCA4 (21066/21068)")
		UNAME_MACHINE=alpha ;;
	    "EV5 (21164)")
		UNAME_MACHINE=alphaev5 ;;
	    "EV5.6 (21164A)")
		UNAME_MACHINE=alphaev56 ;;
	    "EV5.6 (21164PC)")
		UNAME_MACHINE=alphapca56 ;;
	    "EV5.7 (21164PC)")
		UNAME_MACHINE=alphapca57 ;;
	    "EV6 (21264)")
		UNAME_MACHINE=alphaev6 ;;
	    "EV6.7 (21264A)")
		UNAME_MACHINE=alphaev67 ;;
	    "EV6.8CB (21264C)")
		UNAME_MACHINE=alphaev68 ;;
	    "EV6.8AL (21264B)")
		UNAME_MACHINE=alphaev68 ;;
	    "EV6.8CX (21264D)")
		UNAME_MACHINE=alphaev68 ;;
	    "EV6.9A (21264/EV69A)")
		UNAME_MACHINE=alphaev69 ;;
	    "EV7 (21364)")
		UNAME_MACHINE=alphaev7 ;;
	    "EV7.9 (21364A)")
		UNAME_MACHINE=alphaev79 ;;
	esac
	# A Pn.n version is a patched version.
	# A Vn.n version is a released version.
	# A Tn.n version is a released field test version.
	# A Xn.n version is an unreleased experimental baselevel.
	# 1.2 uses "1.2" for uname -r.
	OSF_REL=`echo "$UNAME_RELEASE" | sed -e 's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`
	GUESS=$UNAME_MACHINE-dec-osf$OSF_REL
	;;
    Amiga*:UNIX_System_V:4.0:*)
	GUESS=m68k-unknown-sysv4
	;;
    *:[Aa]miga[Oo][Ss]:*:*)
	GUESS=$UNAME_MACHINE-unknown-amigaos
	;;
    *:[Mm]orph[Oo][Ss]:*:*)
	GUESS=$UNAME_MACHINE-unknown-morphos
	;;
    *:OS/390:*:*)
	GUESS=i370-ibm-openedition
	;;
    *:z/VM:*:*)
	GUESS=s390-ibm-zvmoe
	;;
    *:OS400:*:*)
	GUESS=powerpc-ibm-os400
	;;
    arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
	GUESS=arm-acorn-riscix$UNAME_RELEASE
	;;
    arm*:riscos:*:*|arm*:RISCOS:*:*)
	GUESS=arm-unknown-riscos
	;;
    SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*)
	GUESS=hppa1.1-hitachi-hiuxmpp
	;;
    Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
	# akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
	case `(/bin/universe) 2>/dev/null` in
	    att) GUESS=pyramid-pyramid-sysv3 ;;
	    *)   GUESS=pyramid-pyramid-bsd   ;;
	esac
	;;
    NILE*:*:*:dcosx)
	GUESS=pyramid-pyramid-svr4
	;;
    DRS?6000:unix:4.0:6*)
	GUESS=sparc-icl-nx6
	;;
    DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*)
	case `/usr/bin/uname -p` in
	    sparc) GUESS=sparc-icl-nx7 ;;
	esac
	;;
    s390x:SunOS:*:*)
	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
	GUESS=$UNAME_MACHINE-ibm-solaris2$SUN_REL
	;;
    sun4H:SunOS:5.*:*)
	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
	GUESS=sparc-hal-solaris2$SUN_REL
	;;
    sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
	GUESS=sparc-sun-solaris2$SUN_REL
	;;
    i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
	GUESS=i386-pc-auroraux$UNAME_RELEASE
	;;
    i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
	set_cc_for_build
	SUN_ARCH=i386
	# If there is a compiler, see if it is configured for 64-bit objects.
	# Note that the Sun cc does not turn __LP64__ into 1 like gcc does.
	# This test works for both compilers.
	if test "$CC_FOR_BUILD" != no_compiler_found; then
	    if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
		(CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
		grep IS_64BIT_ARCH >/dev/null
	    then
		SUN_ARCH=x86_64
	    fi
	fi
	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
	GUESS=$SUN_ARCH-pc-solaris2$SUN_REL
	;;
    sun4*:SunOS:6*:*)
	# According to config.sub, this is the proper way to canonicalize
	# SunOS6.  Hard to guess exactly what SunOS6 will be like, but
	# it's likely to be more like Solaris than SunOS4.
	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
	GUESS=sparc-sun-solaris3$SUN_REL
	;;
    sun4*:SunOS:*:*)
	case `/usr/bin/arch -k` in
	    Series*|S4*)
		UNAME_RELEASE=`uname -v`
		;;
	esac
	# Japanese Language versions have a version number like `4.1.3-JL'.
	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/'`
	GUESS=sparc-sun-sunos$SUN_REL
	;;
    sun3*:SunOS:*:*)
	GUESS=m68k-sun-sunos$UNAME_RELEASE
	;;
    sun*:*:4.2BSD:*)
	UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
	test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3
	case `/bin/arch` in
	    sun3)
		GUESS=m68k-sun-sunos$UNAME_RELEASE
		;;
	    sun4)
		GUESS=sparc-sun-sunos$UNAME_RELEASE
		;;
	esac
	;;
    aushp:SunOS:*:*)
	GUESS=sparc-auspex-sunos$UNAME_RELEASE
	;;
    # The situation for MiNT is a little confusing.  The machine name
    # can be virtually everything (everything which is not
    # "atarist" or "atariste" at least should have a processor
    # > m68000).  The system name ranges from "MiNT" over "FreeMiNT"
    # to the lowercase version "mint" (or "freemint").  Finally
    # the system name "TOS" denotes a system which is actually not
    # MiNT.  But MiNT is downward compatible to TOS, so this should
    # be no problem.
    atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*)
	GUESS=m68k-atari-mint$UNAME_RELEASE
	;;
    atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*)
	GUESS=m68k-atari-mint$UNAME_RELEASE
	;;
    *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*)
	GUESS=m68k-atari-mint$UNAME_RELEASE
	;;
    milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*)
	GUESS=m68k-milan-mint$UNAME_RELEASE
	;;
    hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*)
	GUESS=m68k-hades-mint$UNAME_RELEASE
	;;
    *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*)
	GUESS=m68k-unknown-mint$UNAME_RELEASE
	;;
    m68k:machten:*:*)
	GUESS=m68k-apple-machten$UNAME_RELEASE
	;;
    powerpc:machten:*:*)
	GUESS=powerpc-apple-machten$UNAME_RELEASE
	;;
    RISC*:Mach:*:*)
	GUESS=mips-dec-mach_bsd4.3
	;;
    RISC*:ULTRIX:*:*)
	GUESS=mips-dec-ultrix$UNAME_RELEASE
	;;
    VAX*:ULTRIX*:*:*)
	GUESS=vax-dec-ultrix$UNAME_RELEASE
	;;
    2020:CLIX:*:* | 2430:CLIX:*:*)
	GUESS=clipper-intergraph-clix$UNAME_RELEASE
	;;
    mips:*:*:UMIPS | mips:*:*:RISCos)
	set_cc_for_build
	sed 's/^	//' << EOF > "$dummy.c"
#ifdef __cplusplus
#include <stdio.h>  /* for printf() prototype */
	int main (int argc, char *argv[]) {
#else
	int main (argc, argv) int argc; char *argv[]; {
#endif
	#if defined (host_mips) && defined (MIPSEB)
	#if defined (SYSTYPE_SYSV)
	  printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0);
	#endif
	#if defined (SYSTYPE_SVR4)
	  printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0);
	#endif
	#if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
	  printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0);
	#endif
	#endif
	  exit (-1);
	}
EOF
	$CC_FOR_BUILD -o "$dummy" "$dummy.c" &&
	  dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` &&
	  SYSTEM_NAME=`"$dummy" "$dummyarg"` &&
	    { echo "$SYSTEM_NAME"; exit; }
	GUESS=mips-mips-riscos$UNAME_RELEASE
	;;
    Motorola:PowerMAX_OS:*:*)
	GUESS=powerpc-motorola-powermax
	;;
    Motorola:*:4.3:PL8-*)
	GUESS=powerpc-harris-powermax
	;;
    Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*)
	GUESS=powerpc-harris-powermax
	;;
    Night_Hawk:Power_UNIX:*:*)
	GUESS=powerpc-harris-powerunix
	;;
    m88k:CX/UX:7*:*)
	GUESS=m88k-harris-cxux7
	;;
    m88k:*:4*:R4*)
	GUESS=m88k-motorola-sysv4
	;;
    m88k:*:3*:R3*)
	GUESS=m88k-motorola-sysv3
	;;
    AViiON:dgux:*:*)
	# DG/UX returns AViiON for all architectures
	UNAME_PROCESSOR=`/usr/bin/uname -p`
	if test "$UNAME_PROCESSOR" = mc88100 || test "$UNAME_PROCESSOR" = mc88110
	then
	    if test "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx || \
	       test "$TARGET_BINARY_INTERFACE"x = x
	    then
		GUESS=m88k-dg-dgux$UNAME_RELEASE
	    else
		GUESS=m88k-dg-dguxbcs$UNAME_RELEASE
	    fi
	else
	    GUESS=i586-dg-dgux$UNAME_RELEASE
	fi
	;;
    M88*:DolphinOS:*:*)	# DolphinOS (SVR3)
	GUESS=m88k-dolphin-sysv3
	;;
    M88*:*:R3*:*)
	# Delta 88k system running SVR3
	GUESS=m88k-motorola-sysv3
	;;
    XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
	GUESS=m88k-tektronix-sysv3
	;;
    Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
	GUESS=m68k-tektronix-bsd
	;;
    *:IRIX*:*:*)
	IRIX_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/g'`
	GUESS=mips-sgi-irix$IRIX_REL
	;;
    ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
	GUESS=romp-ibm-aix    # uname -m gives an 8 hex-code CPU id
	;;                    # Note that: echo "'`uname -s`'" gives 'AIX '
    i*86:AIX:*:*)
	GUESS=i386-ibm-aix
	;;
    ia64:AIX:*:*)
	if test -x /usr/bin/oslevel ; then
		IBM_REV=`/usr/bin/oslevel`
	else
		IBM_REV=$UNAME_VERSION.$UNAME_RELEASE
	fi
	GUESS=$UNAME_MACHINE-ibm-aix$IBM_REV
	;;
    *:AIX:2:3)
	if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
		set_cc_for_build
		sed 's/^		//' << EOF > "$dummy.c"
		#include <sys/systemcfg.h>

		main()
			{
			if (!__power_pc())
				exit(1);
			puts("powerpc-ibm-aix3.2.5");
			exit(0);
			}
EOF
		if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"`
		then
			GUESS=$SYSTEM_NAME
		else
			GUESS=rs6000-ibm-aix3.2.5
		fi
	elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
		GUESS=rs6000-ibm-aix3.2.4
	else
		GUESS=rs6000-ibm-aix3.2
	fi
	;;
    *:AIX:*:[4567])
	IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'`
	if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then
		IBM_ARCH=rs6000
	else
		IBM_ARCH=powerpc
	fi
	if test -x /usr/bin/lslpp ; then
		IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | \
			   awk -F: '{ print $3 }' | sed s/[0-9]*$/0/`
	else
		IBM_REV=$UNAME_VERSION.$UNAME_RELEASE
	fi
	GUESS=$IBM_ARCH-ibm-aix$IBM_REV
	;;
    *:AIX:*:*)
	GUESS=rs6000-ibm-aix
	;;
    ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*)
	GUESS=romp-ibm-bsd4.4
	;;
    ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC BSD and
	GUESS=romp-ibm-bsd$UNAME_RELEASE    # 4.3 with uname added to
	;;                                  # report: romp-ibm BSD 4.3
    *:BOSX:*:*)
	GUESS=rs6000-bull-bosx
	;;
    DPX/2?00:B.O.S.:*:*)
	GUESS=m68k-bull-sysv3
	;;
    9000/[34]??:4.3bsd:1.*:*)
	GUESS=m68k-hp-bsd
	;;
    hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
	GUESS=m68k-hp-bsd4.4
	;;
    9000/[34678]??:HP-UX:*:*)
	HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'`
	case $UNAME_MACHINE in
	    9000/31?)            HP_ARCH=m68000 ;;
	    9000/[34]??)         HP_ARCH=m68k ;;
	    9000/[678][0-9][0-9])
		if test -x /usr/bin/getconf; then
		    sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
		    sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
		    case $sc_cpu_version in
		      523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0
		      528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1
		      532)                      # CPU_PA_RISC2_0
			case $sc_kernel_bits in
			  32) HP_ARCH=hppa2.0n ;;
			  64) HP_ARCH=hppa2.0w ;;
			  '') HP_ARCH=hppa2.0 ;;   # HP-UX 10.20
			esac ;;
		    esac
		fi
		if test "$HP_ARCH" = ""; then
		    set_cc_for_build
		    sed 's/^		//' << EOF > "$dummy.c"

		#define _HPUX_SOURCE
		#include <stdlib.h>
		#include <unistd.h>

		int main ()
		{
		#if defined(_SC_KERNEL_BITS)
		    long bits = sysconf(_SC_KERNEL_BITS);
		#endif
		    long cpu  = sysconf (_SC_CPU_VERSION);

		    switch (cpu)
			{
			case CPU_PA_RISC1_0: puts ("hppa1.0"); break;
			case CPU_PA_RISC1_1: puts ("hppa1.1"); break;
			case CPU_PA_RISC2_0:
		#if defined(_SC_KERNEL_BITS)
			    switch (bits)
				{
				case 64: puts ("hppa2.0w"); break;
				case 32: puts ("hppa2.0n"); break;
				default: puts ("hppa2.0"); break;
				} break;
		#else  /* !defined(_SC_KERNEL_BITS) */
			    puts ("hppa2.0"); break;
		#endif
			default: puts ("hppa1.0"); break;
			}
		    exit (0);
		}
EOF
		    (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"`
		    test -z "$HP_ARCH" && HP_ARCH=hppa
		fi ;;
	esac
	if test "$HP_ARCH" = hppa2.0w
	then
	    set_cc_for_build

	    # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating
	    # 32-bit code.  hppa64-hp-hpux* has the same kernel and a compiler
	    # generating 64-bit code.  GNU and HP use different nomenclature:
	    #
	    # $ CC_FOR_BUILD=cc ./config.guess
	    # => hppa2.0w-hp-hpux11.23
	    # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
	    # => hppa64-hp-hpux11.23

	    if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) |
		grep -q __LP64__
	    then
		HP_ARCH=hppa2.0w
	    else
		HP_ARCH=hppa64
	    fi
	fi
	GUESS=$HP_ARCH-hp-hpux$HPUX_REV
	;;
    ia64:HP-UX:*:*)
	HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'`
	GUESS=ia64-hp-hpux$HPUX_REV
	;;
    3050*:HI-UX:*:*)
	set_cc_for_build
	sed 's/^	//' << EOF > "$dummy.c"
	#include <unistd.h>
	int
	main ()
	{
	  long cpu = sysconf (_SC_CPU_VERSION);
	  /* The order matters, because CPU_IS_HP_MC68K erroneously returns
	     true for CPU_PA_RISC1_0.  CPU_IS_PA_RISC returns correct
	     results, however.  */
	  if (CPU_IS_PA_RISC (cpu))
	    {
	      switch (cpu)
		{
		  case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
		  case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
		  case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
		  default: puts ("hppa-hitachi-hiuxwe2"); break;
		}
	    }
	  else if (CPU_IS_HP_MC68K (cpu))
	    puts ("m68k-hitachi-hiuxwe2");
	  else puts ("unknown-hitachi-hiuxwe2");
	  exit (0);
	}
EOF
	$CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` &&
		{ echo "$SYSTEM_NAME"; exit; }
	GUESS=unknown-hitachi-hiuxwe2
	;;
    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*)
	GUESS=hppa1.1-hp-bsd
	;;
    9000/8??:4.3bsd:*:*)
	GUESS=hppa1.0-hp-bsd
	;;
    *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*)
	GUESS=hppa1.0-hp-mpeix
	;;
    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*)
	GUESS=hppa1.1-hp-osf
	;;
    hp8??:OSF1:*:*)
	GUESS=hppa1.0-hp-osf
	;;
    i*86:OSF1:*:*)
	if test -x /usr/sbin/sysversion ; then
	    GUESS=$UNAME_MACHINE-unknown-osf1mk
	else
	    GUESS=$UNAME_MACHINE-unknown-osf1
	fi
	;;
    parisc*:Lites*:*:*)
	GUESS=hppa1.1-hp-lites
	;;
    C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
	GUESS=c1-convex-bsd
	;;
    C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
	if getsysinfo -f scalar_acc
	then echo c32-convex-bsd
	else echo c2-convex-bsd
	fi
	exit ;;
    C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
	GUESS=c34-convex-bsd
	;;
    C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
	GUESS=c38-convex-bsd
	;;
    C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
	GUESS=c4-convex-bsd
	;;
    CRAY*Y-MP:*:*:*)
	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
	GUESS=ymp-cray-unicos$CRAY_REL
	;;
    CRAY*[A-Z]90:*:*:*)
	echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \
	| sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
	      -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \
	      -e 's/\.[^.]*$/.X/'
	exit ;;
    CRAY*TS:*:*:*)
	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
	GUESS=t90-cray-unicos$CRAY_REL
	;;
    CRAY*T3E:*:*:*)
	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
	GUESS=alphaev5-cray-unicosmk$CRAY_REL
	;;
    CRAY*SV1:*:*:*)
	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
	GUESS=sv1-cray-unicos$CRAY_REL
	;;
    *:UNICOS/mp:*:*)
	CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
	GUESS=craynv-cray-unicosmp$CRAY_REL
	;;
    F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
	FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`
	FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
	FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'`
	GUESS=${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}
	;;
    5000:UNIX_System_V:4.*:*)
	FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
	FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'`
	GUESS=sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}
	;;
    i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
	GUESS=$UNAME_MACHINE-pc-bsdi$UNAME_RELEASE
	;;
    sparc*:BSD/OS:*:*)
	GUESS=sparc-unknown-bsdi$UNAME_RELEASE
	;;
    *:BSD/OS:*:*)
	GUESS=$UNAME_MACHINE-unknown-bsdi$UNAME_RELEASE
	;;
    arm:FreeBSD:*:*)
	UNAME_PROCESSOR=`uname -p`
	set_cc_for_build
	if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
	    | grep -q __ARM_PCS_VFP
	then
	    FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
	    GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabi
	else
	    FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
	    GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabihf
	fi
	;;
    *:FreeBSD:*:*)
	UNAME_PROCESSOR=`/usr/bin/uname -p`
	case $UNAME_PROCESSOR in
	    amd64)
		UNAME_PROCESSOR=x86_64 ;;
	    i386)
		UNAME_PROCESSOR=i586 ;;
	esac
	FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
	GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL
	;;
    i*:CYGWIN*:*)
	GUESS=$UNAME_MACHINE-pc-cygwin
	;;
    *:MINGW64*:*)
	GUESS=$UNAME_MACHINE-pc-mingw64
	;;
    *:MINGW*:*)
	GUESS=$UNAME_MACHINE-pc-mingw32
	;;
    *:MSYS*:*)
	GUESS=$UNAME_MACHINE-pc-msys
	;;
    i*:PW*:*)
	GUESS=$UNAME_MACHINE-pc-pw32
	;;
    *:Interix*:*)
	case $UNAME_MACHINE in
	    x86)
		GUESS=i586-pc-interix$UNAME_RELEASE
		;;
	    authenticamd | genuineintel | EM64T)
		GUESS=x86_64-unknown-interix$UNAME_RELEASE
		;;
	    IA64)
		GUESS=ia64-unknown-interix$UNAME_RELEASE
		;;
	esac ;;
    i*:UWIN*:*)
	GUESS=$UNAME_MACHINE-pc-uwin
	;;
    amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
	GUESS=x86_64-pc-cygwin
	;;
    prep*:SunOS:5.*:*)
	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
	GUESS=powerpcle-unknown-solaris2$SUN_REL
	;;
    *:GNU:*:*)
	# the GNU system
	GNU_ARCH=`echo "$UNAME_MACHINE" | sed -e 's,[-/].*$,,'`
	GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's,/.*$,,'`
	GUESS=$GNU_ARCH-unknown-$LIBC$GNU_REL
	;;
    *:GNU/*:*:*)
	# other systems with GNU libc and userland
	GNU_SYS=`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"`
	GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
	GUESS=$UNAME_MACHINE-unknown-$GNU_SYS$GNU_REL-$LIBC
	;;
    *:Minix:*:*)
	GUESS=$UNAME_MACHINE-unknown-minix
	;;
    aarch64:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    aarch64_be:Linux:*:*)
	UNAME_MACHINE=aarch64_be
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    alpha:Linux:*:*)
	case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' /proc/cpuinfo 2>/dev/null` in
	  EV5)   UNAME_MACHINE=alphaev5 ;;
	  EV56)  UNAME_MACHINE=alphaev56 ;;
	  PCA56) UNAME_MACHINE=alphapca56 ;;
	  PCA57) UNAME_MACHINE=alphapca56 ;;
	  EV6)   UNAME_MACHINE=alphaev6 ;;
	  EV67)  UNAME_MACHINE=alphaev67 ;;
	  EV68*) UNAME_MACHINE=alphaev68 ;;
	esac
	objdump --private-headers /bin/sh | grep -q ld.so.1
	if test "$?" = 0 ; then LIBC=gnulibc1 ; fi
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    arc:Linux:*:* | arceb:Linux:*:* | arc32:Linux:*:* | arc64:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    arm*:Linux:*:*)
	set_cc_for_build
	if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \
	    | grep -q __ARM_EABI__
	then
	    GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	else
	    if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
		| grep -q __ARM_PCS_VFP
	    then
		GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabi
	    else
		GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabihf
	    fi
	fi
	;;
    avr32*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    cris:Linux:*:*)
	GUESS=$UNAME_MACHINE-axis-linux-$LIBC
	;;
    crisv32:Linux:*:*)
	GUESS=$UNAME_MACHINE-axis-linux-$LIBC
	;;
    e2k:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    frv:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    hexagon:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    i*86:Linux:*:*)
	GUESS=$UNAME_MACHINE-pc-linux-$LIBC
	;;
    ia64:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    k1om:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    loongarch32:Linux:*:* | loongarch64:Linux:*:* | loongarchx32:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    m32r*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    m68*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    mips:Linux:*:* | mips64:Linux:*:*)
	set_cc_for_build
	IS_GLIBC=0
	test x"${LIBC}" = xgnu && IS_GLIBC=1
	sed 's/^	//' << EOF > "$dummy.c"
	#undef CPU
	#undef mips
	#undef mipsel
	#undef mips64
	#undef mips64el
	#if ${IS_GLIBC} && defined(_ABI64)
	LIBCABI=gnuabi64
	#else
	#if ${IS_GLIBC} && defined(_ABIN32)
	LIBCABI=gnuabin32
	#else
	LIBCABI=${LIBC}
	#endif
	#endif

	#if ${IS_GLIBC} && defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6
	CPU=mipsisa64r6
	#else
	#if ${IS_GLIBC} && !defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6
	CPU=mipsisa32r6
	#else
	#if defined(__mips64)
	CPU=mips64
	#else
	CPU=mips
	#endif
	#endif
	#endif

	#if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
	MIPS_ENDIAN=el
	#else
	#if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
	MIPS_ENDIAN=
	#else
	MIPS_ENDIAN=
	#endif
	#endif
EOF
	cc_set_vars=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU\|^MIPS_ENDIAN\|^LIBCABI'`
	eval "$cc_set_vars"
	test "x$CPU" != x && { echo "$CPU${MIPS_ENDIAN}-unknown-linux-$LIBCABI"; exit; }
	;;
    mips64el:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    openrisc*:Linux:*:*)
	GUESS=or1k-unknown-linux-$LIBC
	;;
    or32:Linux:*:* | or1k*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    padre:Linux:*:*)
	GUESS=sparc-unknown-linux-$LIBC
	;;
    parisc64:Linux:*:* | hppa64:Linux:*:*)
	GUESS=hppa64-unknown-linux-$LIBC
	;;
    parisc:Linux:*:* | hppa:Linux:*:*)
	# Look for CPU level
	case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
	  PA7*) GUESS=hppa1.1-unknown-linux-$LIBC ;;
	  PA8*) GUESS=hppa2.0-unknown-linux-$LIBC ;;
	  *)    GUESS=hppa-unknown-linux-$LIBC ;;
	esac
	;;
    ppc64:Linux:*:*)
	GUESS=powerpc64-unknown-linux-$LIBC
	;;
    ppc:Linux:*:*)
	GUESS=powerpc-unknown-linux-$LIBC
	;;
    ppc64le:Linux:*:*)
	GUESS=powerpc64le-unknown-linux-$LIBC
	;;
    ppcle:Linux:*:*)
	GUESS=powerpcle-unknown-linux-$LIBC
	;;
    riscv32:Linux:*:* | riscv32be:Linux:*:* | riscv64:Linux:*:* | riscv64be:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    s390:Linux:*:* | s390x:Linux:*:*)
	GUESS=$UNAME_MACHINE-ibm-linux-$LIBC
	;;
    sh64*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    sh*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    sparc:Linux:*:* | sparc64:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    tile*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    vax:Linux:*:*)
	GUESS=$UNAME_MACHINE-dec-linux-$LIBC
	;;
    x86_64:Linux:*:*)
	set_cc_for_build
	LIBCABI=$LIBC
	if test "$CC_FOR_BUILD" != no_compiler_found; then
	    if (echo '#ifdef __ILP32__'; echo IS_X32; echo '#endif') | \
		(CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
		grep IS_X32 >/dev/null
	    then
		LIBCABI=${LIBC}x32
	    fi
	fi
	GUESS=$UNAME_MACHINE-pc-linux-$LIBCABI
	;;
    xtensa*:Linux:*:*)
	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
	;;
    i*86:DYNIX/ptx:4*:*)
	# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
	# earlier versions are messed up and put the nodename in both
	# sysname and nodename.
	GUESS=i386-sequent-sysv4
	;;
    i*86:UNIX_SV:4.2MP:2.*)
	# Unixware is an offshoot of SVR4, but it has its own version
	# number series starting with 2...
	# I am not positive that other SVR4 systems won't match this,
	# I just have to hope.  -- rms.
	# Use sysv4.2uw... so that sysv4* matches it.
	GUESS=$UNAME_MACHINE-pc-sysv4.2uw$UNAME_VERSION
	;;
    i*86:OS/2:*:*)
	# If we were able to find `uname', then EMX Unix compatibility
	# is probably installed.
	GUESS=$UNAME_MACHINE-pc-os2-emx
	;;
    i*86:XTS-300:*:STOP)
	GUESS=$UNAME_MACHINE-unknown-stop
	;;
    i*86:atheos:*:*)
	GUESS=$UNAME_MACHINE-unknown-atheos
	;;
    i*86:syllable:*:*)
	GUESS=$UNAME_MACHINE-pc-syllable
	;;
    i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*)
	GUESS=i386-unknown-lynxos$UNAME_RELEASE
	;;
    i*86:*DOS:*:*)
	GUESS=$UNAME_MACHINE-pc-msdosdjgpp
	;;
    i*86:*:4.*:*)
	UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'`
	if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
		GUESS=$UNAME_MACHINE-univel-sysv$UNAME_REL
	else
		GUESS=$UNAME_MACHINE-pc-sysv$UNAME_REL
	fi
	;;
    i*86:*:5:[678]*)
	# UnixWare 7.x, OpenUNIX and OpenServer 6.
	case `/bin/uname -X | grep "^Machine"` in
	    *486*)	     UNAME_MACHINE=i486 ;;
	    *Pentium)	     UNAME_MACHINE=i586 ;;
	    *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
	esac
	GUESS=$UNAME_MACHINE-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION}
	;;
    i*86:*:3.2:*)
	if test -f /usr/options/cb.name; then
		UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
		GUESS=$UNAME_MACHINE-pc-isc$UNAME_REL
	elif /bin/uname -X 2>/dev/null >/dev/null ; then
		UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
		(/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
		(/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \
			&& UNAME_MACHINE=i586
		(/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \
			&& UNAME_MACHINE=i686
		(/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \
			&& UNAME_MACHINE=i686
		GUESS=$UNAME_MACHINE-pc-sco$UNAME_REL
	else
		GUESS=$UNAME_MACHINE-pc-sysv32
	fi
	;;
    pc:*:*:*)
	# Left here for compatibility:
	# uname -m prints for DJGPP always 'pc', but it prints nothing about
	# the processor, so we play safe by assuming i586.
	# Note: whatever this is, it MUST be the same as what config.sub
	# prints for the "djgpp" host, or else GDB configure will decide that
	# this is a cross-build.
	GUESS=i586-pc-msdosdjgpp
	;;
    Intel:Mach:3*:*)
	GUESS=i386-pc-mach3
	;;
    paragon:*:*:*)
	GUESS=i860-intel-osf1
	;;
    i860:*:4.*:*) # i860-SVR4
	if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
	  GUESS=i860-stardent-sysv$UNAME_RELEASE    # Stardent Vistra i860-SVR4
	else # Add other i860-SVR4 vendors below as they are discovered.
	  GUESS=i860-unknown-sysv$UNAME_RELEASE     # Unknown i860-SVR4
	fi
	;;
    mini*:CTIX:SYS*5:*)
	# "miniframe"
	GUESS=m68010-convergent-sysv
	;;
    mc68k:UNIX:SYSTEM5:3.51m)
	GUESS=m68k-convergent-sysv
	;;
    M680?0:D-NIX:5.3:*)
	GUESS=m68k-diab-dnix
	;;
    M68*:*:R3V[5678]*:*)
	test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;;
    3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0)
	OS_REL=''
	test -r /etc/.relid \
	&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
	  && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
	  && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
    3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
	  && { echo i486-ncr-sysv4; exit; } ;;
    NCR*:*:4.2:* | MPRAS*:*:4.2:*)
	OS_REL='.3'
	test -r /etc/.relid \
	    && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
	    && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
	    && { echo i586-ncr-sysv4.3"$OS_REL"; exit; }
	/bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \
	    && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
    m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*)
	GUESS=m68k-unknown-lynxos$UNAME_RELEASE
	;;
    mc68030:UNIX_System_V:4.*:*)
	GUESS=m68k-atari-sysv4
	;;
    TSUNAMI:LynxOS:2.*:*)
	GUESS=sparc-unknown-lynxos$UNAME_RELEASE
	;;
    rs6000:LynxOS:2.*:*)
	GUESS=rs6000-unknown-lynxos$UNAME_RELEASE
	;;
    PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*)
	GUESS=powerpc-unknown-lynxos$UNAME_RELEASE
	;;
    SM[BE]S:UNIX_SV:*:*)
	GUESS=mips-dde-sysv$UNAME_RELEASE
	;;
    RM*:ReliantUNIX-*:*:*)
	GUESS=mips-sni-sysv4
	;;
    RM*:SINIX-*:*:*)
	GUESS=mips-sni-sysv4
	;;
    *:SINIX-*:*:*)
	if uname -p 2>/dev/null >/dev/null ; then
		UNAME_MACHINE=`(uname -p) 2>/dev/null`
		GUESS=$UNAME_MACHINE-sni-sysv4
	else
		GUESS=ns32k-sni-sysv
	fi
	;;
    PENTIUM:*:4.0*:*)	# Unisys `ClearPath HMP IX 4000' SVR4/MP effort
			# says <Richard.M.Bartel@ccMail.Census.GOV>
	GUESS=i586-unisys-sysv4
	;;
    *:UNIX_System_V:4*:FTX*)
	# From Gerald Hewes <hewes@openmarket.com>.
	# How about differentiating between stratus architectures? -djm
	GUESS=hppa1.1-stratus-sysv4
	;;
    *:*:*:FTX*)
	# From seanf@swdc.stratus.com.
	GUESS=i860-stratus-sysv4
	;;
    i*86:VOS:*:*)
	# From Paul.Green@stratus.com.
	GUESS=$UNAME_MACHINE-stratus-vos
	;;
    *:VOS:*:*)
	# From Paul.Green@stratus.com.
	GUESS=hppa1.1-stratus-vos
	;;
    mc68*:A/UX:*:*)
	GUESS=m68k-apple-aux$UNAME_RELEASE
	;;
    news*:NEWS-OS:6*:*)
	GUESS=mips-sony-newsos6
	;;
    R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*)
	if test -d /usr/nec; then
		GUESS=mips-nec-sysv$UNAME_RELEASE
	else
		GUESS=mips-unknown-sysv$UNAME_RELEASE
	fi
	;;
    BeBox:BeOS:*:*)	# BeOS running on hardware made by Be, PPC only.
	GUESS=powerpc-be-beos
	;;
    BeMac:BeOS:*:*)	# BeOS running on Mac or Mac clone, PPC only.
	GUESS=powerpc-apple-beos
	;;
    BePC:BeOS:*:*)	# BeOS running on Intel PC compatible.
	GUESS=i586-pc-beos
	;;
    BePC:Haiku:*:*)	# Haiku running on Intel PC compatible.
	GUESS=i586-pc-haiku
	;;
    x86_64:Haiku:*:*)
	GUESS=x86_64-unknown-haiku
	;;
    SX-4:SUPER-UX:*:*)
	GUESS=sx4-nec-superux$UNAME_RELEASE
	;;
    SX-5:SUPER-UX:*:*)
	GUESS=sx5-nec-superux$UNAME_RELEASE
	;;
    SX-6:SUPER-UX:*:*)
	GUESS=sx6-nec-superux$UNAME_RELEASE
	;;
    SX-7:SUPER-UX:*:*)
	GUESS=sx7-nec-superux$UNAME_RELEASE
	;;
    SX-8:SUPER-UX:*:*)
	GUESS=sx8-nec-superux$UNAME_RELEASE
	;;
    SX-8R:SUPER-UX:*:*)
	GUESS=sx8r-nec-superux$UNAME_RELEASE
	;;
    SX-ACE:SUPER-UX:*:*)
	GUESS=sxace-nec-superux$UNAME_RELEASE
	;;
    Power*:Rhapsody:*:*)
	GUESS=powerpc-apple-rhapsody$UNAME_RELEASE
	;;
    *:Rhapsody:*:*)
	GUESS=$UNAME_MACHINE-apple-rhapsody$UNAME_RELEASE
	;;
    arm64:Darwin:*:*)
	GUESS=aarch64-apple-darwin$UNAME_RELEASE
	;;
    *:Darwin:*:*)
	UNAME_PROCESSOR=`uname -p`
	case $UNAME_PROCESSOR in
	    unknown) UNAME_PROCESSOR=powerpc ;;
	esac
	if command -v xcode-select > /dev/null 2> /dev/null && \
		! xcode-select --print-path > /dev/null 2> /dev/null ; then
	    # Avoid executing cc if there is no toolchain installed as
	    # cc will be a stub that puts up a graphical alert
	    # prompting the user to install developer tools.
	    CC_FOR_BUILD=no_compiler_found
	else
	    set_cc_for_build
	fi
	if test "$CC_FOR_BUILD" != no_compiler_found; then
	    if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
		   (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
		   grep IS_64BIT_ARCH >/dev/null
	    then
		case $UNAME_PROCESSOR in
		    i386) UNAME_PROCESSOR=x86_64 ;;
		    powerpc) UNAME_PROCESSOR=powerpc64 ;;
		esac
	    fi
	    # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc
	    if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \
		   (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
		   grep IS_PPC >/dev/null
	    then
		UNAME_PROCESSOR=powerpc
	    fi
	elif test "$UNAME_PROCESSOR" = i386 ; then
	    # uname -m returns i386 or x86_64
	    UNAME_PROCESSOR=$UNAME_MACHINE
	fi
	GUESS=$UNAME_PROCESSOR-apple-darwin$UNAME_RELEASE
	;;
    *:procnto*:*:* | *:QNX:[0123456789]*:*)
	UNAME_PROCESSOR=`uname -p`
	if test "$UNAME_PROCESSOR" = x86; then
		UNAME_PROCESSOR=i386
		UNAME_MACHINE=pc
	fi
	GUESS=$UNAME_PROCESSOR-$UNAME_MACHINE-nto-qnx$UNAME_RELEASE
	;;
    *:QNX:*:4*)
	GUESS=i386-pc-qnx
	;;
    NEO-*:NONSTOP_KERNEL:*:*)
	GUESS=neo-tandem-nsk$UNAME_RELEASE
	;;
    NSE-*:NONSTOP_KERNEL:*:*)
	GUESS=nse-tandem-nsk$UNAME_RELEASE
	;;
    NSR-*:NONSTOP_KERNEL:*:*)
	GUESS=nsr-tandem-nsk$UNAME_RELEASE
	;;
    NSV-*:NONSTOP_KERNEL:*:*)
	GUESS=nsv-tandem-nsk$UNAME_RELEASE
	;;
    NSX-*:NONSTOP_KERNEL:*:*)
	GUESS=nsx-tandem-nsk$UNAME_RELEASE
	;;
    *:NonStop-UX:*:*)
	GUESS=mips-compaq-nonstopux
	;;
    BS2000:POSIX*:*:*)
	GUESS=bs2000-siemens-sysv
	;;
    DS/*:UNIX_System_V:*:*)
	GUESS=$UNAME_MACHINE-$UNAME_SYSTEM-$UNAME_RELEASE
	;;
    *:Plan9:*:*)
	# "uname -m" is not consistent, so use $cputype instead. 386
	# is converted to i386 for consistency with other x86
	# operating systems.
	if test "${cputype-}" = 386; then
	    UNAME_MACHINE=i386
	elif test "x${cputype-}" != x; then
	    UNAME_MACHINE=$cputype
	fi
	GUESS=$UNAME_MACHINE-unknown-plan9
	;;
    *:TOPS-10:*:*)
	GUESS=pdp10-unknown-tops10
	;;
    *:TENEX:*:*)
	GUESS=pdp10-unknown-tenex
	;;
    KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*)
	GUESS=pdp10-dec-tops20
	;;
    XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*)
	GUESS=pdp10-xkl-tops20
	;;
    *:TOPS-20:*:*)
	GUESS=pdp10-unknown-tops20
	;;
    *:ITS:*:*)
	GUESS=pdp10-unknown-its
	;;
    SEI:*:*:SEIUX)
	GUESS=mips-sei-seiux$UNAME_RELEASE
	;;
    *:DragonFly:*:*)
	DRAGONFLY_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
	GUESS=$UNAME_MACHINE-unknown-dragonfly$DRAGONFLY_REL
	;;
    *:*VMS:*:*)
	UNAME_MACHINE=`(uname -p) 2>/dev/null`
	case $UNAME_MACHINE in
	    A*) GUESS=alpha-dec-vms ;;
	    I*) GUESS=ia64-dec-vms ;;
	    V*) GUESS=vax-dec-vms ;;
	esac ;;
    *:XENIX:*:SysV)
	GUESS=i386-pc-xenix
	;;
    i*86:skyos:*:*)
	SKYOS_REL=`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'`
	GUESS=$UNAME_MACHINE-pc-skyos$SKYOS_REL
	;;
    i*86:rdos:*:*)
	GUESS=$UNAME_MACHINE-pc-rdos
	;;
    *:AROS:*:*)
	GUESS=$UNAME_MACHINE-unknown-aros
	;;
    x86_64:VMkernel:*:*)
	GUESS=$UNAME_MACHINE-unknown-esx
	;;
    amd64:Isilon\ OneFS:*:*)
	GUESS=x86_64-unknown-onefs
	;;
    *:Unleashed:*:*)
	GUESS=$UNAME_MACHINE-unknown-unleashed$UNAME_RELEASE
	;;
esac

# Do we have a guess based on uname results?
if test "x$GUESS" != x; then
    echo "$GUESS"
    exit
fi

# No uname command or uname output not recognized.
set_cc_for_build
cat > "$dummy.c" <<EOF
#ifdef _SEQUENT_
#include <sys/types.h>
#include <sys/utsname.h>
#endif
#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__)
#if defined (vax) || defined (__vax) || defined (__vax__) || defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__)
#include <signal.h>
#if defined(_SIZE_T_) || defined(SIGLOST)
#include <sys/utsname.h>
#endif
#endif
#endif
main ()
{
#if defined (sony)
#if defined (MIPSEB)
  /* BFD wants "bsd" instead of "newsos".  Perhaps BFD should be changed,
     I don't know....  */
  printf ("mips-sony-bsd\n"); exit (0);
#else
#include <sys/param.h>
  printf ("m68k-sony-newsos%s\n",
#ifdef NEWSOS4
  "4"
#else
  ""
#endif
  ); exit (0);
#endif
#endif

#if defined (NeXT)
#if !defined (__ARCHITECTURE__)
#define __ARCHITECTURE__ "m68k"
#endif
  int version;
  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
  if (version < 4)
    printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
  else
    printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version);
  exit (0);
#endif

#if defined (MULTIMAX) || defined (n16)
#if defined (UMAXV)
  printf ("ns32k-encore-sysv\n"); exit (0);
#else
#if defined (CMU)
  printf ("ns32k-encore-mach\n"); exit (0);
#else
  printf ("ns32k-encore-bsd\n"); exit (0);
#endif
#endif
#endif

#if defined (__386BSD__)
  printf ("i386-pc-bsd\n"); exit (0);
#endif

#if defined (sequent)
#if defined (i386)
  printf ("i386-sequent-dynix\n"); exit (0);
#endif
#if defined (ns32000)
  printf ("ns32k-sequent-dynix\n"); exit (0);
#endif
#endif

#if defined (_SEQUENT_)
  struct utsname un;

  uname(&un);
  if (strncmp(un.version, "V2", 2) == 0) {
    printf ("i386-sequent-ptx2\n"); exit (0);
  }
  if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
    printf ("i386-sequent-ptx1\n"); exit (0);
  }
  printf ("i386-sequent-ptx\n"); exit (0);
#endif

#if defined (vax)
#if !defined (ultrix)
#include <sys/param.h>
#if defined (BSD)
#if BSD == 43
  printf ("vax-dec-bsd4.3\n"); exit (0);
#else
#if BSD == 199006
  printf ("vax-dec-bsd4.3reno\n"); exit (0);
#else
  printf ("vax-dec-bsd\n"); exit (0);
#endif
#endif
#else
  printf ("vax-dec-bsd\n"); exit (0);
#endif
#else
#if defined(_SIZE_T_) || defined(SIGLOST)
  struct utsname un;
  uname (&un);
  printf ("vax-dec-ultrix%s\n", un.release); exit (0);
#else
  printf ("vax-dec-ultrix\n"); exit (0);
#endif
#endif
#endif
#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__)
#if defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__)
#if defined(_SIZE_T_) || defined(SIGLOST)
  struct utsname *un;
  uname (&un);
  printf ("mips-dec-ultrix%s\n", un.release); exit (0);
#else
  printf ("mips-dec-ultrix\n"); exit (0);
#endif
#endif
#endif

#if defined (alliant) && defined (i860)
  printf ("i860-alliant-bsd\n"); exit (0);
#endif

  exit (1);
}
EOF

$CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null && SYSTEM_NAME=`"$dummy"` &&
	{ echo "$SYSTEM_NAME"; exit; }

# Apollos put the system type in the environment.
test -d /usr/apollo && { echo "$ISP-apollo-$SYSTYPE"; exit; }

echo "$0: unable to guess system type" >&2

case $UNAME_MACHINE:$UNAME_SYSTEM in
    mips:Linux | mips64:Linux)
	# If we got here on MIPS GNU/Linux, output extra information.
	cat >&2 <<EOF

NOTE: MIPS GNU/Linux systems require a C compiler to fully recognize
the system type. Please install a C compiler and try again.
EOF
	;;
esac

cat >&2 <<EOF

This script (version $timestamp), has failed to recognize the
operating system you are using. If your script is old, overwrite *all*
copies of config.guess and config.sub with the latest versions from:

  https://git.savannah.gnu.org/cgit/config.git/plain/config.guess
and
  https://git.savannah.gnu.org/cgit/config.git/plain/config.sub
EOF

our_year=`echo $timestamp | sed 's,-.*,,'`
thisyear=`date +%Y`
# shellcheck disable=SC2003
script_age=`expr "$thisyear" - "$our_year"`
if test "$script_age" -lt 3 ; then
   cat >&2 <<EOF

If $0 has already been updated, send the following data and any
information you think might be pertinent to config-patches@gnu.org to
provide the necessary information to handle your system.

config.guess timestamp = $timestamp

uname -m = `(uname -m) 2>/dev/null || echo unknown`
uname -r = `(uname -r) 2>/dev/null || echo unknown`
uname -s = `(uname -s) 2>/dev/null || echo unknown`
uname -v = `(uname -v) 2>/dev/null || echo unknown`

/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null`
/bin/uname -X     = `(/bin/uname -X) 2>/dev/null`

hostinfo               = `(hostinfo) 2>/dev/null`
/bin/universe          = `(/bin/universe) 2>/dev/null`
/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null`
/bin/arch              = `(/bin/arch) 2>/dev/null`
/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`

UNAME_MACHINE = "$UNAME_MACHINE"
UNAME_RELEASE = "$UNAME_RELEASE"
UNAME_SYSTEM  = "$UNAME_SYSTEM"
UNAME_VERSION = "$UNAME_VERSION"
EOF
fi

exit 1

# Local variables:
# eval: (add-hook 'before-save-hook 'time-stamp)
# time-stamp-start: "timestamp='"
# time-stamp-format: "%:y-%02m-%02d"
# time-stamp-end: "'"
# End:

Deleted autosetup/autosetup-config.sub.

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#! /bin/sh
# Configuration validation subroutine script.
#   Copyright 1992-2021 Free Software Foundation, Inc.

# shellcheck disable=SC2006,SC2268 # see below for rationale

timestamp='2021-07-03'

# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <https://www.gnu.org/licenses/>.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that
# program.  This Exception is an additional permission under section 7
# of the GNU General Public License, version 3 ("GPLv3").


# Please send patches to <config-patches@gnu.org>.
#
# Configuration subroutine to validate and canonicalize a configuration type.
# Supply the specified configuration type as an argument.
# If it is invalid, we print an error message on stderr and exit with code 1.
# Otherwise, we print the canonical config type on stdout and succeed.

# You can get the latest version of this script from:
# https://git.savannah.gnu.org/cgit/config.git/plain/config.sub

# This file is supposed to be the same for all GNU packages
# and recognize all the CPU types, system types and aliases
# that are meaningful with *any* GNU software.
# Each package is responsible for reporting which valid configurations
# it does not support.  The user should be able to distinguish
# a failure to support a valid configuration from a meaningless
# configuration.

# The goal of this file is to map all the various variations of a given
# machine specification into a single specification in the form:
#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
# or in some cases, the newer four-part form:
#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
# It is wrong to echo any other type of specification.

# The "shellcheck disable" line above the timestamp inhibits complaints
# about features and limitations of the classic Bourne shell that were
# superseded or lifted in POSIX.  However, this script identifies a wide
# variety of pre-POSIX systems that do not have POSIX shells at all, and
# even some reasonably current systems (Solaris 10 as case-in-point) still
# have a pre-POSIX /bin/sh.

me=`echo "$0" | sed -e 's,.*/,,'`

usage="\
Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS

Canonicalize a configuration name.

Options:
  -h, --help         print this help, then exit
  -t, --time-stamp   print date of last modification, then exit
  -v, --version      print version number, then exit

Report bugs and patches to <config-patches@gnu.org>."

version="\
GNU config.sub ($timestamp)

Copyright 1992-2021 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."

help="
Try \`$me --help' for more information."

# Parse command line
while test $# -gt 0 ; do
  case $1 in
    --time-stamp | --time* | -t )
       echo "$timestamp" ; exit ;;
    --version | -v )
       echo "$version" ; exit ;;
    --help | --h* | -h )
       echo "$usage"; exit ;;
    -- )     # Stop option processing
       shift; break ;;
    - )	# Use stdin as input.
       break ;;
    -* )
       echo "$me: invalid option $1$help" >&2
       exit 1 ;;

    *local*)
       # First pass through any local machine types.
       echo "$1"
       exit ;;

    * )
       break ;;
  esac
done

case $# in
 0) echo "$me: missing argument$help" >&2
    exit 1;;
 1) ;;
 *) echo "$me: too many arguments$help" >&2
    exit 1;;
esac

# Split fields of configuration type
# shellcheck disable=SC2162
IFS="-" read field1 field2 field3 field4 <<EOF
$1
EOF

# Separate into logical components for further validation
case $1 in
	*-*-*-*-*)
		echo Invalid configuration \`"$1"\': more than four components >&2
		exit 1
		;;
	*-*-*-*)
		basic_machine=$field1-$field2
		basic_os=$field3-$field4
		;;
	*-*-*)
		# Ambiguous whether COMPANY is present, or skipped and KERNEL-OS is two
		# parts
		maybe_os=$field2-$field3
		case $maybe_os in
			nto-qnx* | linux-* | uclinux-uclibc* \
			| uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | netbsd*-gnu* \
			| netbsd*-eabi* | kopensolaris*-gnu* | cloudabi*-eabi* \
			| storm-chaos* | os2-emx* | rtmk-nova*)
				basic_machine=$field1
				basic_os=$maybe_os
				;;
			android-linux)
				basic_machine=$field1-unknown
				basic_os=linux-android
				;;
			*)
				basic_machine=$field1-$field2
				basic_os=$field3
				;;
		esac
		;;
	*-*)
		# A lone config we happen to match not fitting any pattern
		case $field1-$field2 in
			decstation-3100)
				basic_machine=mips-dec
				basic_os=
				;;
			*-*)
				# Second component is usually, but not always the OS
				case $field2 in
					# Prevent following clause from handling this valid os
					sun*os*)
						basic_machine=$field1
						basic_os=$field2
						;;
					# Manufacturers
					dec* | mips* | sequent* | encore* | pc533* | sgi* | sony* \
					| att* | 7300* | 3300* | delta* | motorola* | sun[234]* \
					| unicom* | ibm* | next | hp | isi* | apollo | altos* \
					| convergent* | ncr* | news | 32* | 3600* | 3100* \
					| hitachi* | c[123]* | convex* | sun | crds | omron* | dg \
					| ultra | tti* | harris | dolphin | highlevel | gould \
					| cbm | ns | masscomp | apple | axis | knuth | cray \
					| microblaze* | sim | cisco \
					| oki | wec | wrs | winbond)
						basic_machine=$field1-$field2
						basic_os=
						;;
					*)
						basic_machine=$field1
						basic_os=$field2
						;;
				esac
			;;
		esac
		;;
	*)
		# Convert single-component short-hands not valid as part of
		# multi-component configurations.
		case $field1 in
			386bsd)
				basic_machine=i386-pc
				basic_os=bsd
				;;
			a29khif)
				basic_machine=a29k-amd
				basic_os=udi
				;;
			adobe68k)
				basic_machine=m68010-adobe
				basic_os=scout
				;;
			alliant)
				basic_machine=fx80-alliant
				basic_os=
				;;
			altos | altos3068)
				basic_machine=m68k-altos
				basic_os=
				;;
			am29k)
				basic_machine=a29k-none
				basic_os=bsd
				;;
			amdahl)
				basic_machine=580-amdahl
				basic_os=sysv
				;;
			amiga)
				basic_machine=m68k-unknown
				basic_os=
				;;
			amigaos | amigados)
				basic_machine=m68k-unknown
				basic_os=amigaos
				;;
			amigaunix | amix)
				basic_machine=m68k-unknown
				basic_os=sysv4
				;;
			apollo68)
				basic_machine=m68k-apollo
				basic_os=sysv
				;;
			apollo68bsd)
				basic_machine=m68k-apollo
				basic_os=bsd
				;;
			aros)
				basic_machine=i386-pc
				basic_os=aros
				;;
			aux)
				basic_machine=m68k-apple
				basic_os=aux
				;;
			balance)
				basic_machine=ns32k-sequent
				basic_os=dynix
				;;
			blackfin)
				basic_machine=bfin-unknown
				basic_os=linux
				;;
			cegcc)
				basic_machine=arm-unknown
				basic_os=cegcc
				;;
			convex-c1)
				basic_machine=c1-convex
				basic_os=bsd
				;;
			convex-c2)
				basic_machine=c2-convex
				basic_os=bsd
				;;
			convex-c32)
				basic_machine=c32-convex
				basic_os=bsd
				;;
			convex-c34)
				basic_machine=c34-convex
				basic_os=bsd
				;;
			convex-c38)
				basic_machine=c38-convex
				basic_os=bsd
				;;
			cray)
				basic_machine=j90-cray
				basic_os=unicos
				;;
			crds | unos)
				basic_machine=m68k-crds
				basic_os=
				;;
			da30)
				basic_machine=m68k-da30
				basic_os=
				;;
			decstation | pmax | pmin | dec3100 | decstatn)
				basic_machine=mips-dec
				basic_os=
				;;
			delta88)
				basic_machine=m88k-motorola
				basic_os=sysv3
				;;
			dicos)
				basic_machine=i686-pc
				basic_os=dicos
				;;
			djgpp)
				basic_machine=i586-pc
				basic_os=msdosdjgpp
				;;
			ebmon29k)
				basic_machine=a29k-amd
				basic_os=ebmon
				;;
			es1800 | OSE68k | ose68k | ose | OSE)
				basic_machine=m68k-ericsson
				basic_os=ose
				;;
			gmicro)
				basic_machine=tron-gmicro
				basic_os=sysv
				;;
			go32)
				basic_machine=i386-pc
				basic_os=go32
				;;
			h8300hms)
				basic_machine=h8300-hitachi
				basic_os=hms
				;;
			h8300xray)
				basic_machine=h8300-hitachi
				basic_os=xray
				;;
			h8500hms)
				basic_machine=h8500-hitachi
				basic_os=hms
				;;
			harris)
				basic_machine=m88k-harris
				basic_os=sysv3
				;;
			hp300 | hp300hpux)
				basic_machine=m68k-hp
				basic_os=hpux
				;;
			hp300bsd)
				basic_machine=m68k-hp
				basic_os=bsd
				;;
			hppaosf)
				basic_machine=hppa1.1-hp
				basic_os=osf
				;;
			hppro)
				basic_machine=hppa1.1-hp
				basic_os=proelf
				;;
			i386mach)
				basic_machine=i386-mach
				basic_os=mach
				;;
			isi68 | isi)
				basic_machine=m68k-isi
				basic_os=sysv
				;;
			m68knommu)
				basic_machine=m68k-unknown
				basic_os=linux
				;;
			magnum | m3230)
				basic_machine=mips-mips
				basic_os=sysv
				;;
			merlin)
				basic_machine=ns32k-utek
				basic_os=sysv
				;;
			mingw64)
				basic_machine=x86_64-pc
				basic_os=mingw64
				;;
			mingw32)
				basic_machine=i686-pc
				basic_os=mingw32
				;;
			mingw32ce)
				basic_machine=arm-unknown
				basic_os=mingw32ce
				;;
			monitor)
				basic_machine=m68k-rom68k
				basic_os=coff
				;;
			morphos)
				basic_machine=powerpc-unknown
				basic_os=morphos
				;;
			moxiebox)
				basic_machine=moxie-unknown
				basic_os=moxiebox
				;;
			msdos)
				basic_machine=i386-pc
				basic_os=msdos
				;;
			msys)
				basic_machine=i686-pc
				basic_os=msys
				;;
			mvs)
				basic_machine=i370-ibm
				basic_os=mvs
				;;
			nacl)
				basic_machine=le32-unknown
				basic_os=nacl
				;;
			ncr3000)
				basic_machine=i486-ncr
				basic_os=sysv4
				;;
			netbsd386)
				basic_machine=i386-pc
				basic_os=netbsd
				;;
			netwinder)
				basic_machine=armv4l-rebel
				basic_os=linux
				;;
			news | news700 | news800 | news900)
				basic_machine=m68k-sony
				basic_os=newsos
				;;
			news1000)
				basic_machine=m68030-sony
				basic_os=newsos
				;;
			necv70)
				basic_machine=v70-nec
				basic_os=sysv
				;;
			nh3000)
				basic_machine=m68k-harris
				basic_os=cxux
				;;
			nh[45]000)
				basic_machine=m88k-harris
				basic_os=cxux
				;;
			nindy960)
				basic_machine=i960-intel
				basic_os=nindy
				;;
			mon960)
				basic_machine=i960-intel
				basic_os=mon960
				;;
			nonstopux)
				basic_machine=mips-compaq
				basic_os=nonstopux
				;;
			os400)
				basic_machine=powerpc-ibm
				basic_os=os400
				;;
			OSE68000 | ose68000)
				basic_machine=m68000-ericsson
				basic_os=ose
				;;
			os68k)
				basic_machine=m68k-none
				basic_os=os68k
				;;
			paragon)
				basic_machine=i860-intel
				basic_os=osf
				;;
			parisc)
				basic_machine=hppa-unknown
				basic_os=linux
				;;
			psp)
				basic_machine=mipsallegrexel-sony
				basic_os=psp
				;;
			pw32)
				basic_machine=i586-unknown
				basic_os=pw32
				;;
			rdos | rdos64)
				basic_machine=x86_64-pc
				basic_os=rdos
				;;
			rdos32)
				basic_machine=i386-pc
				basic_os=rdos
				;;
			rom68k)
				basic_machine=m68k-rom68k
				basic_os=coff
				;;
			sa29200)
				basic_machine=a29k-amd
				basic_os=udi
				;;
			sei)
				basic_machine=mips-sei
				basic_os=seiux
				;;
			sequent)
				basic_machine=i386-sequent
				basic_os=
				;;
			sps7)
				basic_machine=m68k-bull
				basic_os=sysv2
				;;
			st2000)
				basic_machine=m68k-tandem
				basic_os=
				;;
			stratus)
				basic_machine=i860-stratus
				basic_os=sysv4
				;;
			sun2)
				basic_machine=m68000-sun
				basic_os=
				;;
			sun2os3)
				basic_machine=m68000-sun
				basic_os=sunos3
				;;
			sun2os4)
				basic_machine=m68000-sun
				basic_os=sunos4
				;;
			sun3)
				basic_machine=m68k-sun
				basic_os=
				;;
			sun3os3)
				basic_machine=m68k-sun
				basic_os=sunos3
				;;
			sun3os4)
				basic_machine=m68k-sun
				basic_os=sunos4
				;;
			sun4)
				basic_machine=sparc-sun
				basic_os=
				;;
			sun4os3)
				basic_machine=sparc-sun
				basic_os=sunos3
				;;
			sun4os4)
				basic_machine=sparc-sun
				basic_os=sunos4
				;;
			sun4sol2)
				basic_machine=sparc-sun
				basic_os=solaris2
				;;
			sun386 | sun386i | roadrunner)
				basic_machine=i386-sun
				basic_os=
				;;
			sv1)
				basic_machine=sv1-cray
				basic_os=unicos
				;;
			symmetry)
				basic_machine=i386-sequent
				basic_os=dynix
				;;
			t3e)
				basic_machine=alphaev5-cray
				basic_os=unicos
				;;
			t90)
				basic_machine=t90-cray
				basic_os=unicos
				;;
			toad1)
				basic_machine=pdp10-xkl
				basic_os=tops20
				;;
			tpf)
				basic_machine=s390x-ibm
				basic_os=tpf
				;;
			udi29k)
				basic_machine=a29k-amd
				basic_os=udi
				;;
			ultra3)
				basic_machine=a29k-nyu
				basic_os=sym1
				;;
			v810 | necv810)
				basic_machine=v810-nec
				basic_os=none
				;;
			vaxv)
				basic_machine=vax-dec
				basic_os=sysv
				;;
			vms)
				basic_machine=vax-dec
				basic_os=vms
				;;
			vsta)
				basic_machine=i386-pc
				basic_os=vsta
				;;
			vxworks960)
				basic_machine=i960-wrs
				basic_os=vxworks
				;;
			vxworks68)
				basic_machine=m68k-wrs
				basic_os=vxworks
				;;
			vxworks29k)
				basic_machine=a29k-wrs
				basic_os=vxworks
				;;
			xbox)
				basic_machine=i686-pc
				basic_os=mingw32
				;;
			ymp)
				basic_machine=ymp-cray
				basic_os=unicos
				;;
			*)
				basic_machine=$1
				basic_os=
				;;
		esac
		;;
esac

# Decode 1-component or ad-hoc basic machines
case $basic_machine in
	# Here we handle the default manufacturer of certain CPU types.  It is in
	# some cases the only manufacturer, in others, it is the most popular.
	w89k)
		cpu=hppa1.1
		vendor=winbond
		;;
	op50n)
		cpu=hppa1.1
		vendor=oki
		;;
	op60c)
		cpu=hppa1.1
		vendor=oki
		;;
	ibm*)
		cpu=i370
		vendor=ibm
		;;
	orion105)
		cpu=clipper
		vendor=highlevel
		;;
	mac | mpw | mac-mpw)
		cpu=m68k
		vendor=apple
		;;
	pmac | pmac-mpw)
		cpu=powerpc
		vendor=apple
		;;

	# Recognize the various machine names and aliases which stand
	# for a CPU type and a company and sometimes even an OS.
	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
		cpu=m68000
		vendor=att
		;;
	3b*)
		cpu=we32k
		vendor=att
		;;
	bluegene*)
		cpu=powerpc
		vendor=ibm
		basic_os=cnk
		;;
	decsystem10* | dec10*)
		cpu=pdp10
		vendor=dec
		basic_os=tops10
		;;
	decsystem20* | dec20*)
		cpu=pdp10
		vendor=dec
		basic_os=tops20
		;;
	delta | 3300 | motorola-3300 | motorola-delta \
	      | 3300-motorola | delta-motorola)
		cpu=m68k
		vendor=motorola
		;;
	dpx2*)
		cpu=m68k
		vendor=bull
		basic_os=sysv3
		;;
	encore | umax | mmax)
		cpu=ns32k
		vendor=encore
		;;
	elxsi)
		cpu=elxsi
		vendor=elxsi
		basic_os=${basic_os:-bsd}
		;;
	fx2800)
		cpu=i860
		vendor=alliant
		;;
	genix)
		cpu=ns32k
		vendor=ns
		;;
	h3050r* | hiux*)
		cpu=hppa1.1
		vendor=hitachi
		basic_os=hiuxwe2
		;;
	hp3k9[0-9][0-9] | hp9[0-9][0-9])
		cpu=hppa1.0
		vendor=hp
		;;
	hp9k2[0-9][0-9] | hp9k31[0-9])
		cpu=m68000
		vendor=hp
		;;
	hp9k3[2-9][0-9])
		cpu=m68k
		vendor=hp
		;;
	hp9k6[0-9][0-9] | hp6[0-9][0-9])
		cpu=hppa1.0
		vendor=hp
		;;
	hp9k7[0-79][0-9] | hp7[0-79][0-9])
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k78[0-9] | hp78[0-9])
		# FIXME: really hppa2.0-hp
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893)
		# FIXME: really hppa2.0-hp
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k8[0-9][13679] | hp8[0-9][13679])
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k8[0-9][0-9] | hp8[0-9][0-9])
		cpu=hppa1.0
		vendor=hp
		;;
	i*86v32)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=sysv32
		;;
	i*86v4*)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=sysv4
		;;
	i*86v)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=sysv
		;;
	i*86sol2)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=solaris2
		;;
	j90 | j90-cray)
		cpu=j90
		vendor=cray
		basic_os=${basic_os:-unicos}
		;;
	iris | iris4d)
		cpu=mips
		vendor=sgi
		case $basic_os in
		    irix*)
			;;
		    *)
			basic_os=irix4
			;;
		esac
		;;
	miniframe)
		cpu=m68000
		vendor=convergent
		;;
	*mint | mint[0-9]* | *MiNT | *MiNT[0-9]*)
		cpu=m68k
		vendor=atari
		basic_os=mint
		;;
	news-3600 | risc-news)
		cpu=mips
		vendor=sony
		basic_os=newsos
		;;
	next | m*-next)
		cpu=m68k
		vendor=next
		case $basic_os in
		    openstep*)
		        ;;
		    nextstep*)
			;;
		    ns2*)
		      basic_os=nextstep2
			;;
		    *)
		      basic_os=nextstep3
			;;
		esac
		;;
	np1)
		cpu=np1
		vendor=gould
		;;
	op50n-* | op60c-*)
		cpu=hppa1.1
		vendor=oki
		basic_os=proelf
		;;
	pa-hitachi)
		cpu=hppa1.1
		vendor=hitachi
		basic_os=hiuxwe2
		;;
	pbd)
		cpu=sparc
		vendor=tti
		;;
	pbb)
		cpu=m68k
		vendor=tti
		;;
	pc532)
		cpu=ns32k
		vendor=pc532
		;;
	pn)
		cpu=pn
		vendor=gould
		;;
	power)
		cpu=power
		vendor=ibm
		;;
	ps2)
		cpu=i386
		vendor=ibm
		;;
	rm[46]00)
		cpu=mips
		vendor=siemens
		;;
	rtpc | rtpc-*)
		cpu=romp
		vendor=ibm
		;;
	sde)
		cpu=mipsisa32
		vendor=sde
		basic_os=${basic_os:-elf}
		;;
	simso-wrs)
		cpu=sparclite
		vendor=wrs
		basic_os=vxworks
		;;
	tower | tower-32)
		cpu=m68k
		vendor=ncr
		;;
	vpp*|vx|vx-*)
		cpu=f301
		vendor=fujitsu
		;;
	w65)
		cpu=w65
		vendor=wdc
		;;
	w89k-*)
		cpu=hppa1.1
		vendor=winbond
		basic_os=proelf
		;;
	none)
		cpu=none
		vendor=none
		;;
	leon|leon[3-9])
		cpu=sparc
		vendor=$basic_machine
		;;
	leon-*|leon[3-9]-*)
		cpu=sparc
		vendor=`echo "$basic_machine" | sed 's/-.*//'`
		;;

	*-*)
		# shellcheck disable=SC2162
		IFS="-" read cpu vendor <<EOF
$basic_machine
EOF
		;;
	# We use `pc' rather than `unknown'
	# because (1) that's what they normally are, and
	# (2) the word "unknown" tends to confuse beginning users.
	i*86 | x86_64)
		cpu=$basic_machine
		vendor=pc
		;;
	# These rules are duplicated from below for sake of the special case above;
	# i.e. things that normalized to x86 arches should also default to "pc"
	pc98)
		cpu=i386
		vendor=pc
		;;
	x64 | amd64)
		cpu=x86_64
		vendor=pc
		;;
	# Recognize the basic CPU types without company name.
	*)
		cpu=$basic_machine
		vendor=unknown
		;;
esac

unset -v basic_machine

# Decode basic machines in the full and proper CPU-Company form.
case $cpu-$vendor in
	# Here we handle the default manufacturer of certain CPU types in canonical form. It is in
	# some cases the only manufacturer, in others, it is the most popular.
	craynv-unknown)
		vendor=cray
		basic_os=${basic_os:-unicosmp}
		;;
	c90-unknown | c90-cray)
		vendor=cray
		basic_os=${Basic_os:-unicos}
		;;
	fx80-unknown)
		vendor=alliant
		;;
	romp-unknown)
		vendor=ibm
		;;
	mmix-unknown)
		vendor=knuth
		;;
	microblaze-unknown | microblazeel-unknown)
		vendor=xilinx
		;;
	rs6000-unknown)
		vendor=ibm
		;;
	vax-unknown)
		vendor=dec
		;;
	pdp11-unknown)
		vendor=dec
		;;
	we32k-unknown)
		vendor=att
		;;
	cydra-unknown)
		vendor=cydrome
		;;
	i370-ibm*)
		vendor=ibm
		;;
	orion-unknown)
		vendor=highlevel
		;;
	xps-unknown | xps100-unknown)
		cpu=xps100
		vendor=honeywell
		;;

	# Here we normalize CPU types with a missing or matching vendor
	dpx20-unknown | dpx20-bull)
		cpu=rs6000
		vendor=bull
		basic_os=${basic_os:-bosx}
		;;

	# Here we normalize CPU types irrespective of the vendor
	amd64-*)
		cpu=x86_64
		;;
	blackfin-*)
		cpu=bfin
		basic_os=linux
		;;
	c54x-*)
		cpu=tic54x
		;;
	c55x-*)
		cpu=tic55x
		;;
	c6x-*)
		cpu=tic6x
		;;
	e500v[12]-*)
		cpu=powerpc
		basic_os=${basic_os}"spe"
		;;
	mips3*-*)
		cpu=mips64
		;;
	ms1-*)
		cpu=mt
		;;
	m68knommu-*)
		cpu=m68k
		basic_os=linux
		;;
	m9s12z-* | m68hcs12z-* | hcs12z-* | s12z-*)
		cpu=s12z
		;;
	openrisc-*)
		cpu=or32
		;;
	parisc-*)
		cpu=hppa
		basic_os=linux
		;;
	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
		cpu=i586
		;;
	pentiumpro-* | p6-* | 6x86-* | athlon-* | athalon_*-*)
		cpu=i686
		;;
	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
		cpu=i686
		;;
	pentium4-*)
		cpu=i786
		;;
	pc98-*)
		cpu=i386
		;;
	ppc-* | ppcbe-*)
		cpu=powerpc
		;;
	ppcle-* | powerpclittle-*)
		cpu=powerpcle
		;;
	ppc64-*)
		cpu=powerpc64
		;;
	ppc64le-* | powerpc64little-*)
		cpu=powerpc64le
		;;
	sb1-*)
		cpu=mipsisa64sb1
		;;
	sb1el-*)
		cpu=mipsisa64sb1el
		;;
	sh5e[lb]-*)
		cpu=`echo "$cpu" | sed 's/^\(sh.\)e\(.\)$/\1\2e/'`
		;;
	spur-*)
		cpu=spur
		;;
	strongarm-* | thumb-*)
		cpu=arm
		;;
	tx39-*)
		cpu=mipstx39
		;;
	tx39el-*)
		cpu=mipstx39el
		;;
	x64-*)
		cpu=x86_64
		;;
	xscale-* | xscalee[bl]-*)
		cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
		;;
	arm64-*)
		cpu=aarch64
		;;

	# Recognize the canonical CPU Types that limit and/or modify the
	# company names they are paired with.
	cr16-*)
		basic_os=${basic_os:-elf}
		;;
	crisv32-* | etraxfs*-*)
		cpu=crisv32
		vendor=axis
		;;
	cris-* | etrax*-*)
		cpu=cris
		vendor=axis
		;;
	crx-*)
		basic_os=${basic_os:-elf}
		;;
	neo-tandem)
		cpu=neo
		vendor=tandem
		;;
	nse-tandem)
		cpu=nse
		vendor=tandem
		;;
	nsr-tandem)
		cpu=nsr
		vendor=tandem
		;;
	nsv-tandem)
		cpu=nsv
		vendor=tandem
		;;
	nsx-tandem)
		cpu=nsx
		vendor=tandem
		;;
	mipsallegrexel-sony)
		cpu=mipsallegrexel
		vendor=sony
		;;
	tile*-*)
		basic_os=${basic_os:-linux-gnu}
		;;

	*)
		# Recognize the canonical CPU types that are allowed with any
		# company name.
		case $cpu in
			1750a | 580 \
			| a29k \
			| aarch64 | aarch64_be \
			| abacus \
			| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] \
			| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] \
			| alphapca5[67] | alpha64pca5[67] \
			| am33_2.0 \
			| amdgcn \
			| arc | arceb | arc32 | arc64 \
			| arm | arm[lb]e | arme[lb] | armv* \
			| avr | avr32 \
			| asmjs \
			| ba \
			| be32 | be64 \
			| bfin | bpf | bs2000 \
			| c[123]* | c30 | [cjt]90 | c4x \
			| c8051 | clipper | craynv | csky | cydra \
			| d10v | d30v | dlx | dsp16xx \
			| e2k | elxsi | epiphany \
			| f30[01] | f700 | fido | fr30 | frv | ft32 | fx80 \
			| h8300 | h8500 \
			| hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
			| hexagon \
			| i370 | i*86 | i860 | i960 | ia16 | ia64 \
			| ip2k | iq2000 \
			| k1om \
			| le32 | le64 \
			| lm32 \
			| loongarch32 | loongarch64 | loongarchx32 \
			| m32c | m32r | m32rle \
			| m5200 | m68000 | m680[012346]0 | m68360 | m683?2 | m68k \
			| m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x \
			| m88110 | m88k | maxq | mb | mcore | mep | metag \
			| microblaze | microblazeel \
			| mips | mipsbe | mipseb | mipsel | mipsle \
			| mips16 \
			| mips64 | mips64eb | mips64el \
			| mips64octeon | mips64octeonel \
			| mips64orion | mips64orionel \
			| mips64r5900 | mips64r5900el \
			| mips64vr | mips64vrel \
			| mips64vr4100 | mips64vr4100el \
			| mips64vr4300 | mips64vr4300el \
			| mips64vr5000 | mips64vr5000el \
			| mips64vr5900 | mips64vr5900el \
			| mipsisa32 | mipsisa32el \
			| mipsisa32r2 | mipsisa32r2el \
			| mipsisa32r3 | mipsisa32r3el \
			| mipsisa32r5 | mipsisa32r5el \
			| mipsisa32r6 | mipsisa32r6el \
			| mipsisa64 | mipsisa64el \
			| mipsisa64r2 | mipsisa64r2el \
			| mipsisa64r3 | mipsisa64r3el \
			| mipsisa64r5 | mipsisa64r5el \
			| mipsisa64r6 | mipsisa64r6el \
			| mipsisa64sb1 | mipsisa64sb1el \
			| mipsisa64sr71k | mipsisa64sr71kel \
			| mipsr5900 | mipsr5900el \
			| mipstx39 | mipstx39el \
			| mmix \
			| mn10200 | mn10300 \
			| moxie \
			| mt \
			| msp430 \
			| nds32 | nds32le | nds32be \
			| nfp \
			| nios | nios2 | nios2eb | nios2el \
			| none | np1 | ns16k | ns32k | nvptx \
			| open8 \
			| or1k* \
			| or32 \
			| orion \
			| picochip \
			| pdp10 | pdp11 | pj | pjl | pn | power \
			| powerpc | powerpc64 | powerpc64le | powerpcle | powerpcspe \
			| pru \
			| pyramid \
			| riscv | riscv32 | riscv32be | riscv64 | riscv64be \
			| rl78 | romp | rs6000 | rx \
			| s390 | s390x \
			| score \
			| sh | shl \
			| sh[1234] | sh[24]a | sh[24]ae[lb] | sh[23]e | she[lb] | sh[lb]e \
			| sh[1234]e[lb] |  sh[12345][lb]e | sh[23]ele | sh64 | sh64le \
			| sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet \
			| sparclite \
			| sparcv8 | sparcv9 | sparcv9b | sparcv9v | sv1 | sx* \
			| spu \
			| tahoe \
			| thumbv7* \
			| tic30 | tic4x | tic54x | tic55x | tic6x | tic80 \
			| tron \
			| ubicom32 \
			| v70 | v850 | v850e | v850e1 | v850es | v850e2 | v850e2v3 \
			| vax \
			| visium \
			| w65 \
			| wasm32 | wasm64 \
			| we32k \
			| x86 | x86_64 | xc16x | xgate | xps100 \
			| xstormy16 | xtensa* \
			| ymp \
			| z8k | z80)
				;;

			*)
				echo Invalid configuration \`"$1"\': machine \`"$cpu-$vendor"\' not recognized 1>&2
				exit 1
				;;
		esac
		;;
esac

# Here we canonicalize certain aliases for manufacturers.
case $vendor in
	digital*)
		vendor=dec
		;;
	commodore*)
		vendor=cbm
		;;
	*)
		;;
esac

# Decode manufacturer-specific aliases for certain operating systems.

if test x$basic_os != x
then

# First recognize some ad-hoc caes, or perhaps split kernel-os, or else just
# set os.
case $basic_os in
	gnu/linux*)
		kernel=linux
		os=`echo "$basic_os" | sed -e 's|gnu/linux|gnu|'`
		;;
	os2-emx)
		kernel=os2
		os=`echo "$basic_os" | sed -e 's|os2-emx|emx|'`
		;;
	nto-qnx*)
		kernel=nto
		os=`echo "$basic_os" | sed -e 's|nto-qnx|qnx|'`
		;;
	*-*)
		# shellcheck disable=SC2162
		IFS="-" read kernel os <<EOF
$basic_os
EOF
		;;
	# Default OS when just kernel was specified
	nto*)
		kernel=nto
		os=`echo "$basic_os" | sed -e 's|nto|qnx|'`
		;;
	linux*)
		kernel=linux
		os=`echo "$basic_os" | sed -e 's|linux|gnu|'`
		;;
	*)
		kernel=
		os=$basic_os
		;;
esac

# Now, normalize the OS (knowing we just have one component, it's not a kernel,
# etc.)
case $os in
	# First match some system type aliases that might get confused
	# with valid system types.
	# solaris* is a basic system type, with this one exception.
	auroraux)
		os=auroraux
		;;
	bluegene*)
		os=cnk
		;;
	solaris1 | solaris1.*)
		os=`echo "$os" | sed -e 's|solaris1|sunos4|'`
		;;
	solaris)
		os=solaris2
		;;
	unixware*)
		os=sysv4.2uw
		;;
	# es1800 is here to avoid being matched by es* (a different OS)
	es1800*)
		os=ose
		;;
	# Some version numbers need modification
	chorusos*)
		os=chorusos
		;;
	isc)
		os=isc2.2
		;;
	sco6)
		os=sco5v6
		;;
	sco5)
		os=sco3.2v5
		;;
	sco4)
		os=sco3.2v4
		;;
	sco3.2.[4-9]*)
		os=`echo "$os" | sed -e 's/sco3.2./sco3.2v/'`
		;;
	sco*v* | scout)
		# Don't match below
		;;
	sco*)
		os=sco3.2v2
		;;
	psos*)
		os=psos
		;;
	qnx*)
		os=qnx
		;;
	hiux*)
		os=hiuxwe2
		;;
	lynx*178)
		os=lynxos178
		;;
	lynx*5)
		os=lynxos5
		;;
	lynxos*)
		# don't get caught up in next wildcard
		;;
	lynx*)
		os=lynxos
		;;
	mac[0-9]*)
		os=`echo "$os" | sed -e 's|mac|macos|'`
		;;
	opened*)
		os=openedition
		;;
	os400*)
		os=os400
		;;
	sunos5*)
		os=`echo "$os" | sed -e 's|sunos5|solaris2|'`
		;;
	sunos6*)
		os=`echo "$os" | sed -e 's|sunos6|solaris3|'`
		;;
	wince*)
		os=wince
		;;
	utek*)
		os=bsd
		;;
	dynix*)
		os=bsd
		;;
	acis*)
		os=aos
		;;
	atheos*)
		os=atheos
		;;
	syllable*)
		os=syllable
		;;
	386bsd)
		os=bsd
		;;
	ctix* | uts*)
		os=sysv
		;;
	nova*)
		os=rtmk-nova
		;;
	ns2)
		os=nextstep2
		;;
	# Preserve the version number of sinix5.
	sinix5.*)
		os=`echo "$os" | sed -e 's|sinix|sysv|'`
		;;
	sinix*)
		os=sysv4
		;;
	tpf*)
		os=tpf
		;;
	triton*)
		os=sysv3
		;;
	oss*)
		os=sysv3
		;;
	svr4*)
		os=sysv4
		;;
	svr3)
		os=sysv3
		;;
	sysvr4)
		os=sysv4
		;;
	ose*)
		os=ose
		;;
	*mint | mint[0-9]* | *MiNT | MiNT[0-9]*)
		os=mint
		;;
	dicos*)
		os=dicos
		;;
	pikeos*)
		# Until real need of OS specific support for
		# particular features comes up, bare metal
		# configurations are quite functional.
		case $cpu in
		    arm*)
			os=eabi
			;;
		    *)
			os=elf
			;;
		esac
		;;
	*)
		# No normalization, but not necessarily accepted, that comes below.
		;;
esac

else

# Here we handle the default operating systems that come with various machines.
# The value should be what the vendor currently ships out the door with their
# machine or put another way, the most popular os provided with the machine.

# Note that if you're going to try to match "-MANUFACTURER" here (say,
# "-sun"), then you have to tell the case statement up towards the top
# that MANUFACTURER isn't an operating system.  Otherwise, code above
# will signal an error saying that MANUFACTURER isn't an operating
# system, and we'll never get to this point.

kernel=
case $cpu-$vendor in
	score-*)
		os=elf
		;;
	spu-*)
		os=elf
		;;
	*-acorn)
		os=riscix1.2
		;;
	arm*-rebel)
		kernel=linux
		os=gnu
		;;
	arm*-semi)
		os=aout
		;;
	c4x-* | tic4x-*)
		os=coff
		;;
	c8051-*)
		os=elf
		;;
	clipper-intergraph)
		os=clix
		;;
	hexagon-*)
		os=elf
		;;
	tic54x-*)
		os=coff
		;;
	tic55x-*)
		os=coff
		;;
	tic6x-*)
		os=coff
		;;
	# This must come before the *-dec entry.
	pdp10-*)
		os=tops20
		;;
	pdp11-*)
		os=none
		;;
	*-dec | vax-*)
		os=ultrix4.2
		;;
	m68*-apollo)
		os=domain
		;;
	i386-sun)
		os=sunos4.0.2
		;;
	m68000-sun)
		os=sunos3
		;;
	m68*-cisco)
		os=aout
		;;
	mep-*)
		os=elf
		;;
	mips*-cisco)
		os=elf
		;;
	mips*-*)
		os=elf
		;;
	or32-*)
		os=coff
		;;
	*-tti)	# must be before sparc entry or we get the wrong os.
		os=sysv3
		;;
	sparc-* | *-sun)
		os=sunos4.1.1
		;;
	pru-*)
		os=elf
		;;
	*-be)
		os=beos
		;;
	*-ibm)
		os=aix
		;;
	*-knuth)
		os=mmixware
		;;
	*-wec)
		os=proelf
		;;
	*-winbond)
		os=proelf
		;;
	*-oki)
		os=proelf
		;;
	*-hp)
		os=hpux
		;;
	*-hitachi)
		os=hiux
		;;
	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
		os=sysv
		;;
	*-cbm)
		os=amigaos
		;;
	*-dg)
		os=dgux
		;;
	*-dolphin)
		os=sysv3
		;;
	m68k-ccur)
		os=rtu
		;;
	m88k-omron*)
		os=luna
		;;
	*-next)
		os=nextstep
		;;
	*-sequent)
		os=ptx
		;;
	*-crds)
		os=unos
		;;
	*-ns)
		os=genix
		;;
	i370-*)
		os=mvs
		;;
	*-gould)
		os=sysv
		;;
	*-highlevel)
		os=bsd
		;;
	*-encore)
		os=bsd
		;;
	*-sgi)
		os=irix
		;;
	*-siemens)
		os=sysv4
		;;
	*-masscomp)
		os=rtu
		;;
	f30[01]-fujitsu | f700-fujitsu)
		os=uxpv
		;;
	*-rom68k)
		os=coff
		;;
	*-*bug)
		os=coff
		;;
	*-apple)
		os=macos
		;;
	*-atari*)
		os=mint
		;;
	*-wrs)
		os=vxworks
		;;
	*)
		os=none
		;;
esac

fi

# Now, validate our (potentially fixed-up) OS.
case $os in
	# Sometimes we do "kernel-libc", so those need to count as OSes.
	musl* | newlib* | uclibc*)
		;;
	# Likewise for "kernel-abi"
	eabi* | gnueabi*)
		;;
	# VxWorks passes extra cpu info in the 4th filed.
	simlinux | simwindows | spe)
		;;
	# Now accept the basic system types.
	# The portable systems comes first.
	# Each alternative MUST end in a * to match a version number.
	gnu* | android* | bsd* | mach* | minix* | genix* | ultrix* | irix* \
	     | *vms* | esix* | aix* | cnk* | sunos | sunos[34]* \
	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
	     | sym* |  plan9* | psp* | sim* | xray* | os68k* | v88r* \
	     | hiux* | abug | nacl* | netware* | windows* \
	     | os9* | macos* | osx* | ios* \
	     | mpw* | magic* | mmixware* | mon960* | lnews* \
	     | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
	     | aos* | aros* | cloudabi* | sortix* | twizzler* \
	     | nindy* | vxsim* | vxworks* | ebmon* | hms* | mvs* \
	     | clix* | riscos* | uniplus* | iris* | isc* | rtu* | xenix* \
	     | mirbsd* | netbsd* | dicos* | openedition* | ose* \
	     | bitrig* | openbsd* | secbsd* | solidbsd* | libertybsd* | os108* \
	     | ekkobsd* | freebsd* | riscix* | lynxos* | os400* \
	     | bosx* | nextstep* | cxux* | aout* | elf* | oabi* \
	     | ptx* | coff* | ecoff* | winnt* | domain* | vsta* \
	     | udi* | lites* | ieee* | go32* | aux* | hcos* \
	     | chorusrdb* | cegcc* | glidix* | serenity* \
	     | cygwin* | msys* | pe* | moss* | proelf* | rtems* \
	     | midipix* | mingw32* | mingw64* | mint* \
	     | uxpv* | beos* | mpeix* | udk* | moxiebox* \
	     | interix* | uwin* | mks* | rhapsody* | darwin* \
	     | openstep* | oskit* | conix* | pw32* | nonstopux* \
	     | storm-chaos* | tops10* | tenex* | tops20* | its* \
	     | os2* | vos* | palmos* | uclinux* | nucleus* | morphos* \
	     | scout* | superux* | sysv* | rtmk* | tpf* | windiss* \
	     | powermax* | dnix* | nx6 | nx7 | sei* | dragonfly* \
	     | skyos* | haiku* | rdos* | toppers* | drops* | es* \
	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx*)
		;;
	# This one is extra strict with allowed versions
	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
		# Don't forget version if it is 3.2v4 or newer.
		;;
	none)
		;;
	*)
		echo Invalid configuration \`"$1"\': OS \`"$os"\' not recognized 1>&2
		exit 1
		;;
esac

# As a final step for OS-related things, validate the OS-kernel combination
# (given a valid OS), if there is a kernel.
case $kernel-$os in
	linux-gnu* | linux-dietlibc* | linux-android* | linux-newlib* | linux-musl* | linux-uclibc* )
		;;
	uclinux-uclibc* )
		;;
	-dietlibc* | -newlib* | -musl* | -uclibc* )
		# These are just libc implementations, not actual OSes, and thus
		# require a kernel.
		echo "Invalid configuration \`$1': libc \`$os' needs explicit kernel." 1>&2
		exit 1
		;;
	kfreebsd*-gnu* | kopensolaris*-gnu*)
		;;
	vxworks-simlinux | vxworks-simwindows | vxworks-spe)
		;;
	nto-qnx*)
		;;
	os2-emx)
		;;
	*-eabi* | *-gnueabi*)
		;;
	-*)
		# Blank kernel with real OS is always fine.
		;;
	*-*)
		echo "Invalid configuration \`$1': Kernel \`$kernel' not known to work with OS \`$os'." 1>&2
		exit 1
		;;
esac

# Here we handle the case where we know the os, and the CPU type, but not the
# manufacturer.  We pick the logical manufacturer.
case $vendor in
	unknown)
		case $cpu-$os in
			*-riscix*)
				vendor=acorn
				;;
			*-sunos*)
				vendor=sun
				;;
			*-cnk* | *-aix*)
				vendor=ibm
				;;
			*-beos*)
				vendor=be
				;;
			*-hpux*)
				vendor=hp
				;;
			*-mpeix*)
				vendor=hp
				;;
			*-hiux*)
				vendor=hitachi
				;;
			*-unos*)
				vendor=crds
				;;
			*-dgux*)
				vendor=dg
				;;
			*-luna*)
				vendor=omron
				;;
			*-genix*)
				vendor=ns
				;;
			*-clix*)
				vendor=intergraph
				;;
			*-mvs* | *-opened*)
				vendor=ibm
				;;
			*-os400*)
				vendor=ibm
				;;
			s390-* | s390x-*)
				vendor=ibm
				;;
			*-ptx*)
				vendor=sequent
				;;
			*-tpf*)
				vendor=ibm
				;;
			*-vxsim* | *-vxworks* | *-windiss*)
				vendor=wrs
				;;
			*-aux*)
				vendor=apple
				;;
			*-hms*)
				vendor=hitachi
				;;
			*-mpw* | *-macos*)
				vendor=apple
				;;
			*-*mint | *-mint[0-9]* | *-*MiNT | *-MiNT[0-9]*)
				vendor=atari
				;;
			*-vos*)
				vendor=stratus
				;;
		esac
		;;
esac

echo "$cpu-$vendor-${kernel:+$kernel-}$os"
exit

# Local variables:
# eval: (add-hook 'before-save-hook 'time-stamp)
# time-stamp-start: "timestamp='"
# time-stamp-format: "%:y-%02m-%02d"
# time-stamp-end: "'"
# End:

Deleted autosetup/autosetup-find-tclsh.

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#!/bin/sh
# Looks for a suitable tclsh or jimsh in the PATH
# If not found, builds a bootstrap jimsh in current dir from source
# Prefer $autosetup_tclsh if is set in the environment (unless ./jimsh0 works)
d="`dirname "$0"`"
for tclsh in ./jimsh0 $autosetup_tclsh jimsh tclsh tclsh8.5 tclsh8.6 tclsh8.7; do
	{ $tclsh "$d/autosetup-test-tclsh"; } 2>/dev/null && exit 0
done
echo 1>&2 "No installed jimsh or tclsh, building local bootstrap jimsh0"
for cc in ${CC_FOR_BUILD:-cc} gcc; do
	{ $cc -o jimsh0 "$d/jimsh0.c"; } 2>/dev/null || continue
	./jimsh0 "$d/autosetup-test-tclsh" && exit 0
done
echo 1>&2 "No working C compiler found. Tried ${CC_FOR_BUILD:-cc} and gcc."
echo false

Deleted autosetup/autosetup-test-tclsh.

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# A small Tcl script to verify that the chosen
# interpreter works. Sometimes we might e.g. pick up
# an interpreter for a different arch.
# Outputs the full path to the interpreter

if {[catch {info version} version] == 0} {
	# This is Jim Tcl
	if {$version >= 0.72} {
		# Ensure that regexp works
		regexp (a.*?) a
		puts [info nameofexecutable]
		exit 0
	}
} elseif {[catch {info tclversion} version] == 0} {
	if {$version >= 8.5 && ![string match 8.5a* [info patchlevel]]} {
		puts [info nameofexecutable]
		exit 0
	}
}
exit 1

Deleted autosetup/cc-db.tcl.

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# Copyright (c) 2011 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# @synopsis:
#
# The 'cc-db' module provides a knowledge-base of system idiosyncrasies.
# In general, this module can always be included.

use cc

options {}

# openbsd needs sys/types.h to detect some system headers
cc-include-needs sys/socket.h sys/types.h
cc-include-needs netinet/in.h sys/types.h

Deleted autosetup/cc-lib.tcl.

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# Copyright (c) 2011 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# @synopsis:
#
# Provides a library of common tests on top of the 'cc' module.

use cc

# @cc-check-lfs
#
# The equivalent of the 'AC_SYS_LARGEFILE' macro.
#
# defines 'HAVE_LFS' if LFS is available,
# and defines '_FILE_OFFSET_BITS=64' if necessary
#
# Returns 1 if 'LFS' is available or 0 otherwise
#
proc cc-check-lfs {} {
	cc-check-includes sys/types.h
	msg-checking "Checking if -D_FILE_OFFSET_BITS=64 is needed..."
	set lfs 1
	if {[msg-quiet cc-with {-includes sys/types.h} {cc-check-sizeof off_t}] == 8} {
		msg-result no
	} elseif {[msg-quiet cc-with {-includes sys/types.h -cflags -D_FILE_OFFSET_BITS=64} {cc-check-sizeof off_t}] == 8} {
		define _FILE_OFFSET_BITS 64
		msg-result yes
	} else {
		set lfs 0
		msg-result none
	}
	define-feature lfs $lfs
	return $lfs
}

# @cc-check-endian
#
# The equivalent of the 'AC_C_BIGENDIAN' macro.
#
# defines 'HAVE_BIG_ENDIAN' if endian is known to be big,
# or 'HAVE_LITTLE_ENDIAN' if endian is known to be little.
#
# Returns 1 if determined, or 0 if not.
#
proc cc-check-endian {} {
	cc-check-includes sys/types.h sys/param.h
	set rc 0
	msg-checking "Checking endian..."
	cc-with {-includes {sys/types.h sys/param.h}} {
		if {[cctest -code {
			#if !defined(BIG_ENDIAN) || !defined(BYTE_ORDER)
				#error unknown
			#elif BYTE_ORDER != BIG_ENDIAN
				#error little
			#endif
		}]} {
			define-feature big-endian
			msg-result "big"
			set rc 1
		} elseif {[cctest -code {
			#if !defined(LITTLE_ENDIAN) || !defined(BYTE_ORDER)
				#error unknown
			#elif BYTE_ORDER != LITTLE_ENDIAN
				#error big
			#endif
		}]} {
			define-feature little-endian
			msg-result "little"
			set rc 1
		} else {
			msg-result "unknown"
		}
	}
	return $rc
}

# @cc-check-flags flag ?...?
#
# Checks whether the given C/C++ compiler flags can be used. Defines feature
# names prefixed with 'HAVE_CFLAG' and 'HAVE_CXXFLAG' respectively, and
# appends working flags to '-cflags' and 'CFLAGS' or 'CXXFLAGS'.
proc cc-check-flags {args} {
	set result 1
	array set opts [cc-get-settings]
	switch -exact -- $opts(-lang) {
		c++ {
			set lang C++
			set prefix CXXFLAG
		}
		c {
			set lang C
			set prefix CFLAG
		}
		default {
			autosetup-error "cc-check-flags failed with unknown language: $opts(-lang)"
		}
	}
	foreach flag $args {
		msg-checking "Checking whether the $lang compiler accepts $flag..."
		if {[cctest -cflags $flag]} {
			msg-result yes
			define-feature $prefix$flag
			cc-with [list -cflags [list $flag]]
			define-append ${prefix}S $flag
		} else {
			msg-result no
			set result 0
		}
	}
	return $result
}

# @cc-check-standards ver ?...?
#
# Checks whether the C/C++ compiler accepts one of the specified '-std=$ver'
# options, and appends the first working one to '-cflags' and 'CFLAGS' or
# 'CXXFLAGS'.
proc cc-check-standards {args} {
	array set opts [cc-get-settings]
	foreach std $args {
		if {[cc-check-flags -std=$std]} {
			return $std
		}
	}
	return ""
}

# Checks whether $keyword is usable as alignof
proc cctest_alignof {keyword} {
	msg-checking "Checking for $keyword..."
	if {[cctest -code "int x = ${keyword}(char), y = ${keyword}('x');"]} then {
		msg-result ok
		define-feature $keyword
	} else {
		msg-result "not found"
	}
}

# @cc-check-c11
#
# Checks for several C11/C++11 extensions and their alternatives. Currently
# checks for '_Static_assert', '_Alignof', '__alignof__', '__alignof'.
proc cc-check-c11 {} {
	msg-checking "Checking for _Static_assert..."
	if {[cctest -code {
		_Static_assert(1, "static assertions are available");
	}]} then {
		msg-result ok
		define-feature _Static_assert
	} else {
		msg-result "not found"
	}

	cctest_alignof _Alignof
	cctest_alignof __alignof__
	cctest_alignof __alignof
}

# @cc-check-alloca
#
# The equivalent of the 'AC_FUNC_ALLOCA' macro.
#
# Checks for the existence of 'alloca'
# defines 'HAVE_ALLOCA' and returns 1 if it exists.
proc cc-check-alloca {} {
	cc-check-some-feature alloca {
		cctest -includes alloca.h -code { alloca (2 * sizeof (int)); }
	}
}

# @cc-signal-return-type
#
# The equivalent of the 'AC_TYPE_SIGNAL' macro.
#
# defines 'RETSIGTYPE' to 'int' or 'void'.
proc cc-signal-return-type {} {
	msg-checking "Checking return type of signal handlers..."
	cc-with {-includes {sys/types.h signal.h}} {
		if {[cctest -code {return *(signal (0, 0)) (0) == 1;}]} {
				set type int
		} else {
				set type void
		}
		define RETSIGTYPE $type
		msg-result $type
	}
}

Deleted autosetup/cc-shared.tcl.

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# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# @synopsis:
#
# The 'cc-shared' module provides support for shared libraries and shared objects.
# It defines the following variables:
#
## SH_CFLAGS         Flags to use compiling sources destined for a shared library
## SH_LDFLAGS        Flags to use linking (creating) a shared library
## SH_SOPREFIX       Prefix to use to set the soname when creating a shared library
## SH_SOFULLPATH     Set to 1 if the shared library soname should include the full install path
## SH_SOEXT          Extension for shared libs
## SH_SOEXTVER       Format for versioned shared libs - %s = version
## SHOBJ_CFLAGS      Flags to use compiling sources destined for a shared object
## SHOBJ_LDFLAGS     Flags to use linking a shared object, undefined symbols allowed
## SHOBJ_LDFLAGS_R   - as above, but all symbols must be resolved
## SH_LINKRPATH      Format for setting the rpath when linking an executable, %s = path
## SH_LINKFLAGS      Flags to use linking an executable which will load shared objects
## LD_LIBRARY_PATH   Environment variable which specifies path to shared libraries
## STRIPLIBFLAGS     Arguments to strip a dynamic library

options {}

# Defaults: gcc on unix
define SHOBJ_CFLAGS -fPIC
define SHOBJ_LDFLAGS -shared
define SH_CFLAGS -fPIC
define SH_LDFLAGS -shared
define SH_LINKFLAGS -rdynamic
define SH_LINKRPATH "-Wl,-rpath -Wl,%s"
define SH_SOEXT .so
define SH_SOEXTVER .so.%s
define SH_SOPREFIX -Wl,-soname,
define LD_LIBRARY_PATH LD_LIBRARY_PATH
define STRIPLIBFLAGS --strip-unneeded

# Note: This is a helpful reference for identifying the toolchain
#       http://sourceforge.net/apps/mediawiki/predef/index.php?title=Compilers

switch -glob -- [get-define host] {
	*-*-darwin* {
		define SHOBJ_CFLAGS "-dynamic -fno-common"
		define SHOBJ_LDFLAGS "-bundle -undefined dynamic_lookup"
		define SHOBJ_LDFLAGS_R -bundle
		define SH_CFLAGS -dynamic
		define SH_LDFLAGS -dynamiclib
		define SH_LINKFLAGS ""
		define SH_SOEXT .dylib
		define SH_SOEXTVER .%s.dylib
		define SH_SOPREFIX -Wl,-install_name,
		define SH_SOFULLPATH
		define LD_LIBRARY_PATH DYLD_LIBRARY_PATH
		define STRIPLIBFLAGS -x
	}
	*-*-ming* - *-*-cygwin - *-*-msys {
		define SHOBJ_CFLAGS ""
		define SHOBJ_LDFLAGS -shared
		define SH_CFLAGS ""
		define SH_LDFLAGS -shared
		define SH_LINKRPATH ""
		define SH_LINKFLAGS ""
		define SH_SOEXT .dll
		define SH_SOEXTVER .dll
		define SH_SOPREFIX ""
		define LD_LIBRARY_PATH PATH
	}
	sparc* {
		if {[msg-quiet cc-check-decls __SUNPRO_C]} {
			msg-result "Found sun stdio compiler"
			# sun stdio compiler
			# XXX: These haven't been fully tested.
			define SHOBJ_CFLAGS -KPIC
			define SHOBJ_LDFLAGS "-G"
			define SH_CFLAGS -KPIC
			define SH_LINKFLAGS -Wl,-export-dynamic
			define SH_SOPREFIX -Wl,-h,
		}
	}
	*-*-solaris* {
		if {[msg-quiet cc-check-decls __SUNPRO_C]} {
			msg-result "Found sun stdio compiler"
			# sun stdio compiler
			# XXX: These haven't been fully tested.
			define SHOBJ_CFLAGS -KPIC
			define SHOBJ_LDFLAGS "-G"
			define SH_CFLAGS -KPIC
			define SH_LINKFLAGS -Wl,-export-dynamic
			define SH_SOPREFIX -Wl,-h,
		}
	}
	*-*-hpux {
		# XXX: These haven't been tested
		define SHOBJ_CFLAGS "+O3 +z"
		define SHOBJ_LDFLAGS -b
		define SH_CFLAGS +z
		define SH_LINKFLAGS -Wl,+s
		define LD_LIBRARY_PATH SHLIB_PATH
	}
	*-*-haiku {
		define SHOBJ_CFLAGS ""
		define SHOBJ_LDFLAGS -shared
		define SH_CFLAGS ""
		define SH_LDFLAGS -shared
		define SH_LINKFLAGS ""
		define SH_SOPREFIX ""
		define LD_LIBRARY_PATH LIBRARY_PATH
	}
}

if {![is-defined SHOBJ_LDFLAGS_R]} {
	define SHOBJ_LDFLAGS_R [get-define SHOBJ_LDFLAGS]
}

Deleted autosetup/cc.tcl.

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# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# @synopsis:
#
# The 'cc' module supports checking various 'features' of the C or C++
# compiler/linker environment. Common commands are 'cc-check-includes',
# 'cc-check-types', 'cc-check-functions', 'cc-with', 'make-config-header' and 'make-template'.
#
# The following environment variables are used if set:
#
## CC       - C compiler
## CXX      - C++ compiler
## CPP      - C preprocessor
## CCACHE   - Set to "none" to disable automatic use of ccache
## CFLAGS   - Additional C compiler flags
## CXXFLAGS - Additional C++ compiler flags
## LDFLAGS  - Additional compiler flags during linking
## LIBS     - Additional libraries to use (for all tests)
## CROSS    - Tool prefix for cross compilation
#
# The following variables are defined from the corresponding
# environment variables if set.
#
## CPPFLAGS
## LINKFLAGS
## CC_FOR_BUILD
## LD

use system

options {}

# Checks for the existence of the given function by linking
#
proc cctest_function {function} {
	cctest -link 1 -declare "extern void $function\(void);" -code "$function\();"
}

# Checks for the existence of the given type by compiling
proc cctest_type {type} {
	cctest -code "$type _x;"
}

# Checks for the existence of the given type/structure member.
# e.g. "struct stat.st_mtime"
proc cctest_member {struct_member} {
	# split at the first dot
	regexp {^([^.]+)[.](.*)$} $struct_member -> struct member
	cctest -code "static $struct _s; return sizeof(_s.$member);"
}

# Checks for the existence of the given define by compiling
#
proc cctest_define {name} {
	cctest -code "#ifndef $name\n#error not defined\n#endif"
}

# Checks for the existence of the given name either as
# a macro (#define) or an rvalue (such as an enum)
#
proc cctest_decl {name} {
	cctest -code "#ifndef $name\n(void)$name;\n#endif"
}

# @cc-check-sizeof type ...
#
# Checks the size of the given types (between 1 and 32, inclusive).
# Defines a variable with the size determined, or 'unknown' otherwise.
# e.g. for type 'long long', defines 'SIZEOF_LONG_LONG'.
# Returns the size of the last type.
#
proc cc-check-sizeof {args} {
	foreach type $args {
		msg-checking "Checking for sizeof $type..."
		set size unknown
		# Try the most common sizes first
		foreach i {4 8 1 2 16 32} {
			if {[cctest -code "static int _x\[sizeof($type) == $i ? 1 : -1\] = { 1 };"]} {
				set size $i
				break
			}
		}
		msg-result $size
		set define [feature-define-name $type SIZEOF_]
		define $define $size
	}
	# Return the last result
	get-define $define
}

# Checks for each feature in $list by using the given script.
#
# When the script is evaluated, $each is set to the feature
# being checked, and $extra is set to any additional cctest args.
#
# Returns 1 if all features were found, or 0 otherwise.
proc cc-check-some-feature {list script} {
	set ret 1
	foreach each $list {
		if {![check-feature $each $script]} {
			set ret 0
		}
	}
	return $ret
}

# @cc-check-includes includes ...
#
# Checks that the given include files can be used.
proc cc-check-includes {args} {
	cc-check-some-feature $args {
		set with {}
		if {[dict exists $::autosetup(cc-include-deps) $each]} {
			set deps [dict keys [dict get $::autosetup(cc-include-deps) $each]]
			msg-quiet cc-check-includes {*}$deps
			foreach i $deps {
				if {[have-feature $i]} {
					lappend with $i
				}
			}
		}
		if {[llength $with]} {
			cc-with [list -includes $with] {
				cctest -includes $each
			}
		} else {
			cctest -includes $each
		}
	}
}

# @cc-include-needs include required ...
#
# Ensures that when checking for '$include', a check is first
# made for each '$required' file, and if found, it is included with '#include'.
proc cc-include-needs {file args} {
	foreach depfile $args {
		dict set ::autosetup(cc-include-deps) $file $depfile 1
	}
}

# @cc-check-types type ...
#
# Checks that the types exist.
proc cc-check-types {args} {
	cc-check-some-feature $args {
		cctest_type $each
	}
}

# @cc-check-defines define ...
#
# Checks that the given preprocessor symbols are defined.
proc cc-check-defines {args} {
	cc-check-some-feature $args {
		cctest_define $each
	}
}

# @cc-check-decls name ...
#
# Checks that each given name is either a preprocessor symbol or rvalue
# such as an enum. Note that the define used is 'HAVE_DECL_xxx'
# rather than 'HAVE_xxx'.
proc cc-check-decls {args} {
	set ret 1
	foreach name $args {
		msg-checking "Checking for $name..."
		set r [cctest_decl $name]
		define-feature "decl $name" $r
		if {$r} {
			msg-result "ok"
		} else {
			msg-result "not found"
			set ret 0
		}
	}
	return $ret
}

# @cc-check-functions function ...
#
# Checks that the given functions exist (can be linked).
proc cc-check-functions {args} {
	cc-check-some-feature $args {
		cctest_function $each
	}
}

# @cc-check-members type.member ...
#
# Checks that the given type/structure members exist.
# A structure member is of the form 'struct stat.st_mtime'.
proc cc-check-members {args} {
	cc-check-some-feature $args {
		cctest_member $each
	}
}

# @cc-check-function-in-lib function libs ?otherlibs?
#
# Checks that the given function can be found in one of the libs.
#
# First checks for no library required, then checks each of the libraries
# in turn.
#
# If the function is found, the feature is defined and 'lib_$function' is defined
# to '-l$lib' where the function was found, or "" if no library required.
# In addition, '-l$lib' is prepended to the 'LIBS' define.
#
# If additional libraries may be needed for linking, they should be specified
# with '$extralibs' as '-lotherlib1 -lotherlib2'.
# These libraries are not automatically added to 'LIBS'.
#
# Returns 1 if found or 0 if not.
#
proc cc-check-function-in-lib {function libs {otherlibs {}}} {
	msg-checking "Checking libs for $function..."
	set found 0
	cc-with [list -libs $otherlibs] {
		if {[cctest_function $function]} {
			msg-result "none needed"
			define lib_$function ""
			incr found
		} else {
			foreach lib $libs {
				cc-with [list -libs -l$lib] {
					if {[cctest_function $function]} {
						msg-result -l$lib
						define lib_$function -l$lib
						# prepend to LIBS
						define LIBS "-l$lib [get-define LIBS]"
						incr found
						break
					}
				}
			}
		}
	}
	define-feature $function $found
	if {!$found} {
		msg-result "no"
	}
	return $found
}

# @cc-check-tools tool ...
#
# Checks for existence of the given compiler tools, taking
# into account any cross compilation prefix.
#
# For example, when checking for 'ar', first 'AR' is checked on the command
# line and then in the environment. If not found, '${host}-ar' or
# simply 'ar' is assumed depending upon whether cross compiling.
# The path is searched for this executable, and if found 'AR' is defined
# to the executable name.
# Note that even when cross compiling, the simple 'ar' is used as a fallback,
# but a warning is generated. This is necessary for some toolchains.
#
# It is an error if the executable is not found.
#
proc cc-check-tools {args} {
	foreach tool $args {
		set TOOL [string toupper $tool]
		set exe [get-env $TOOL [get-define cross]$tool]
		if {[find-executable {*}$exe]} {
			define $TOOL $exe
			continue
		}
		if {[find-executable {*}$tool]} {
			msg-result "Warning: Failed to find $exe, falling back to $tool which may be incorrect"
			define $TOOL $tool
			continue
		}
		user-error "Failed to find $exe"
	}
}

# @cc-check-progs prog ...
#
# Checks for existence of the given executables on the path.
#
# For example, when checking for 'grep', the path is searched for
# the executable, 'grep', and if found 'GREP' is defined as 'grep'.
#
# If the executable is not found, the variable is defined as 'false'.
# Returns 1 if all programs were found, or 0 otherwise.
#
proc cc-check-progs {args} {
	set failed 0
	foreach prog $args {
		set PROG [string toupper $prog]
		msg-checking "Checking for $prog..."
		if {![find-executable $prog]} {
			msg-result no
			define $PROG false
			incr failed
		} else {
			msg-result ok
			define $PROG $prog
		}
	}
	expr {!$failed}
}

# @cc-path-progs prog ...
#
# Like cc-check-progs, but sets the define to the full path rather
# than just the program name.
#
proc cc-path-progs {args} {
	set failed 0
	foreach prog $args {
		set PROG [string toupper $prog]
		msg-checking "Checking for $prog..."
		set path [find-executable-path $prog]
		if {$path eq ""} {
			msg-result no
			define $PROG false
			incr failed
		} else {
			msg-result $path
			define $PROG $path
		}
	}
	expr {!$failed}
}

# Adds the given settings to $::autosetup(ccsettings) and
# returns the old settings.
#
proc cc-add-settings {settings} {
	if {[llength $settings] % 2} {
		autosetup-error "settings list is missing a value: $settings"
	}

	set prev [cc-get-settings]
	# workaround a bug in some versions of jimsh by forcing
	# conversion of $prev to a list
	llength $prev

	array set new $prev

	foreach {name value} $settings {
		switch -exact -- $name {
			-cflags - -includes {
				# These are given as lists
				lappend new($name) {*}[list-non-empty $value]
			}
			-declare {
				lappend new($name) $value
			}
			-libs {
				# Note that new libraries are added before previous libraries
				set new($name) [list {*}[list-non-empty $value] {*}$new($name)]
			}
			-link - -lang - -nooutput {
				set new($name) $value
			}
			-source - -sourcefile - -code {
				# XXX: These probably are only valid directly from cctest
				set new($name) $value
			}
			default {
				autosetup-error "unknown cctest setting: $name"
			}
		}
	}

	cc-store-settings [array get new]

	return $prev
}

proc cc-store-settings {new} {
	set ::autosetup(ccsettings) $new
}

proc cc-get-settings {} {
	return $::autosetup(ccsettings)
}

# Similar to cc-add-settings, but each given setting
# simply replaces the existing value.
#
# Returns the previous settings
proc cc-update-settings {args} {
	set prev [cc-get-settings]
	cc-store-settings [dict merge $prev $args]
	return $prev
}

# @cc-with settings ?{ script }?
#
# Sets the given 'cctest' settings and then runs the tests in '$script'.
# Note that settings such as '-lang' replace the current setting, while
# those such as '-includes' are appended to the existing setting.
#
# If no script is given, the settings become the default for the remainder
# of the 'auto.def' file.
#
## cc-with {-lang c++} {
##   # This will check with the C++ compiler
##   cc-check-types bool
##   cc-with {-includes signal.h} {
##     # This will check with the C++ compiler, signal.h and any existing includes.
##     ...
##   }
##   # back to just the C++ compiler
## }
#
# The '-libs' setting is special in that newer values are added *before* earlier ones.
#
## cc-with {-libs {-lc -lm}} {
##   cc-with {-libs -ldl} {
##     cctest -libs -lsocket ...
##     # libs will be in this order: -lsocket -ldl -lc -lm
##   }
## }
proc cc-with {settings args} {
	if {[llength $args] == 0} {
		cc-add-settings $settings
	} elseif {[llength $args] > 1} {
		autosetup-error "usage: cc-with settings ?script?"
	} else {
		set save [cc-add-settings $settings]
		set rc [catch {uplevel 1 [lindex $args 0]} result info]
		cc-store-settings $save
		if {$rc != 0} {
			return -code [dict get $info -code] $result
		}
		return $result
	}
}

# @cctest ?settings?
#
# Low level C/C++ compiler checker. Compiles and or links a small C program
# according to the arguments and returns 1 if OK, or 0 if not.
#
# Supported settings are:
#
## -cflags cflags      A list of flags to pass to the compiler
## -includes list      A list of includes, e.g. {stdlib.h stdio.h}
## -declare code       Code to declare before main()
## -link 1             Don't just compile, link too
## -lang c|c++         Use the C (default) or C++ compiler
## -libs liblist       List of libraries to link, e.g. {-ldl -lm}
## -code code          Code to compile in the body of main()
## -source code        Compile a complete program. Ignore -includes, -declare and -code
## -sourcefile file    Shorthand for -source [readfile [get-define srcdir]/$file]
## -nooutput 1         Treat any compiler output (e.g. a warning) as an error
#
# Unless '-source' or '-sourcefile' is specified, the C program looks like:
#
## #include <firstinclude>   /* same for remaining includes in the list */
##
## declare-code              /* any code in -declare, verbatim */
##
## int main(void) {
##   code                    /* any code in -code, verbatim */
##   return 0;
## }
#
# Any failures are recorded in 'config.log'
#
proc cctest {args} {
	set tmp conftest__

	# Easiest way to merge in the settings
	cc-with $args {
		array set opts [cc-get-settings]
	}

	if {[info exists opts(-sourcefile)]} {
		set opts(-source) [readfile [get-define srcdir]/$opts(-sourcefile) "#error can't find $opts(-sourcefile)"]
	}
	if {[info exists opts(-source)]} {
		set lines $opts(-source)
	} else {
		foreach i $opts(-includes) {
			if {$opts(-code) ne "" && ![feature-checked $i]} {
				# Compiling real code with an unchecked header file
				# Quickly (and silently) check for it now

				# Remove all -includes from settings before checking
				set saveopts [cc-update-settings -includes {}]
				msg-quiet cc-check-includes $i
				cc-store-settings $saveopts
			}
			if {$opts(-code) eq "" || [have-feature $i]} {
				lappend source "#include <$i>"
			}
		}
		lappend source {*}$opts(-declare)
		lappend source "int main(void) {"
		lappend source $opts(-code)
		lappend source "return 0;"
		lappend source "}"

		set lines [join $source \n]
	}

	# Build the command line
	set cmdline {}
	lappend cmdline {*}[get-define CCACHE]
	switch -exact -- $opts(-lang) {
		c++ {
			set src conftest__.cpp
			lappend cmdline {*}[get-define CXX] {*}[get-define CXXFLAGS]
		}
		c {
			set src conftest__.c
			lappend cmdline {*}[get-define CC] {*}[get-define CFLAGS]
		}
		default {
			autosetup-error "cctest called with unknown language: $opts(-lang)"
		}
	}

	if {$opts(-link)} {
		lappend cmdline {*}[get-define LDFLAGS]
	} else {
		set tmp conftest__.o
		lappend cmdline -c
	}
	lappend cmdline {*}$opts(-cflags) {*}[get-define cc-default-debug ""]
	lappend cmdline $src -o $tmp {*}$opts(-libs)
	if {$opts(-link)} {
		lappend cmdline {*}[get-define LIBS]
	}

	# At this point we have the complete command line and the
	# complete source to be compiled. Get the result from cache if
	# we can
	if {[info exists ::cc_cache($cmdline,$lines)]} {
		msg-checking "(cached) "
		set ok $::cc_cache($cmdline,$lines)
		if {$::autosetup(debug)} {
			configlog "From cache (ok=$ok): [join $cmdline]"
			configlog "============"
			configlog $lines
			configlog "============"
		}
		return $ok
	}

	writefile $src $lines\n

	set ok 1
	set err [catch {exec-with-stderr {*}$cmdline} result errinfo]
	if {$err || ($opts(-nooutput) && [string length $result])} {
		configlog "Failed: [join $cmdline]"
		configlog $result
		configlog "============"
		configlog "The failed code was:"
		configlog $lines
		configlog "============"
		set ok 0
	} elseif {$::autosetup(debug)} {
		configlog "Compiled OK: [join $cmdline]"
		configlog "============"
		configlog $lines
		configlog "============"
	}
	file delete $src
	file delete $tmp

	# cache it
	set ::cc_cache($cmdline,$lines) $ok

	return $ok
}

# @make-autoconf-h outfile ?auto-patterns=HAVE_*? ?bare-patterns=SIZEOF_*?
#
# Deprecated - see 'make-config-header'
proc make-autoconf-h {file {autopatterns {HAVE_*}} {barepatterns {SIZEOF_* HAVE_DECL_*}}} {
	user-notice "*** make-autoconf-h is deprecated -- use make-config-header instead"
	make-config-header $file -auto $autopatterns -bare $barepatterns
}

# @make-config-header outfile ?-auto patternlist? ?-bare patternlist? ?-none patternlist? ?-str patternlist? ...
#
# Examines all defined variables which match the given patterns
# and writes an include file, '$file', which defines each of these.
# Variables which match '-auto' are output as follows:
# - defines which have the value '0' are ignored.
# - defines which have integer values are defined as the integer value.
# - any other value is defined as a string, e.g. '"value"'
# Variables which match '-bare' are defined as-is.
# Variables which match '-str' are defined as a string, e.g. '"value"'
# Variables which match '-none' are omitted.
#
# Note that order is important. The first pattern that matches is selected.
# Default behaviour is:
#
##  -bare {SIZEOF_* HAVE_DECL_*} -auto HAVE_* -none *
#
# If the file would be unchanged, it is not written.
proc make-config-header {file args} {
	set guard _[string toupper [regsub -all {[^a-zA-Z0-9]} [file tail $file] _]]
	file mkdir [file dirname $file]
	set lines {}
	lappend lines "#ifndef $guard"
	lappend lines "#define $guard"

	# Add some defaults
	lappend args -bare {SIZEOF_* HAVE_DECL_*} -auto HAVE_*

	foreach n [lsort [dict keys [all-defines]]] {
		set value [get-define $n]
		set type [calc-define-output-type $n $args]
		switch -exact -- $type {
			-bare {
				# Just output the value unchanged
			}
			-none {
				continue
			}
			-str {
				set value \"[string map [list \\ \\\\ \" \\\"] $value]\"
			}
			-auto {
				# Automatically determine the type
				if {$value eq "0"} {
					lappend lines "/* #undef $n */"
					continue
				}
				if {![string is integer -strict $value]} {
					set value \"[string map [list \\ \\\\ \" \\\"] $value]\"
				}
			}
			"" {
				continue
			}
			default {
				autosetup-error "Unknown type in make-config-header: $type"
			}
		}
		lappend lines "#define $n $value"
	}
	lappend lines "#endif"
	set buf [join $lines \n]
	write-if-changed $file $buf {
		msg-result "Created $file"
	}
}

proc calc-define-output-type {name spec} {
	foreach {type patterns} $spec {
		foreach pattern $patterns {
			if {[string match $pattern $name]} {
				return $type
			}
		}
	}
	return ""
}

# Initialise some values from the environment or commandline or default settings
foreach i {LDFLAGS LIBS CPPFLAGS LINKFLAGS {CFLAGS "-g -O2"}} {
	lassign $i var default
	define $var [get-env $var $default]
}

if {[env-is-set CC]} {
	# Set by the user, so don't try anything else
	set try [list [get-env CC ""]]
} else {
	# Try some reasonable options
	set try [list [get-define cross]cc [get-define cross]gcc]
}
define CC [find-an-executable {*}$try]
if {[get-define CC] eq ""} {
	user-error "Could not find a C compiler. Tried: [join $try ", "]"
}

define CPP [get-env CPP "[get-define CC] -E"]

# XXX: Could avoid looking for a C++ compiler until requested
# If CXX isn't found, it is set to the empty string.
if {[env-is-set CXX]} {
	define CXX [find-an-executable -required [get-env CXX ""]]
} else {
	define CXX [find-an-executable [get-define cross]c++ [get-define cross]g++]
}

# CXXFLAGS default to CFLAGS if not specified
define CXXFLAGS [get-env CXXFLAGS [get-define CFLAGS]]

# May need a CC_FOR_BUILD, so look for one
define CC_FOR_BUILD [find-an-executable [get-env CC_FOR_BUILD ""] cc gcc false]

if {[get-define CC] eq ""} {
	user-error "Could not find a C compiler. Tried: [join $try ", "]"
}

define CCACHE [find-an-executable [get-env CCACHE ccache]]

# If any of these are set in the environment, propagate them to the AUTOREMAKE commandline
foreach i {CC CXX CCACHE CPP CFLAGS CXXFLAGS CXXFLAGS LDFLAGS LIBS CROSS CPPFLAGS LINKFLAGS CC_FOR_BUILD LD} {
	if {[env-is-set $i]} {
		# Note: If the variable is set on the command line, get-env will return that value
		# so the command line will continue to override the environment
		define-append AUTOREMAKE [quote-if-needed $i=[get-env $i ""]]
	}
}

# Initial cctest settings
cc-store-settings {-cflags {} -includes {} -declare {} -link 0 -lang c -libs {} -code {} -nooutput 0}
set autosetup(cc-include-deps) {}

msg-result "C compiler...[get-define CCACHE] [get-define CC] [get-define CFLAGS]"
if {[get-define CXX] ne "false"} {
	msg-result "C++ compiler...[get-define CCACHE] [get-define CXX] [get-define CXXFLAGS]"
}
msg-result "Build C compiler...[get-define CC_FOR_BUILD]"

# On Darwin, we prefer to use -g0 to avoid creating .dSYM directories
# but some compilers may not support it, so test here.
switch -glob -- [get-define host] {
	*-*-darwin* {
		if {[cctest -cflags {-g0}]} {
			define cc-default-debug -g0
		}
	}
}

if {![cc-check-includes stdlib.h]} {
	user-error "Compiler does not work. See config.log"
}

Deleted autosetup/default.auto.

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# Copyright (c) 2012 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Auto-load module for 'make' build system integration

use init

autosetup_add_init_type make {Simple "make" build system} {
	autosetup_check_create auto.def \
{# Initial auto.def created by 'autosetup --init=make'

use cc

# Add any user options here
options {
}

make-config-header config.h
make-template Makefile.in
}

	if {![file exists Makefile.in]} {
		puts "Note: I don't see Makefile.in. You will probably need to create one."
	}
}

Deleted autosetup/jimsh0.c.

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# For this project, disable the pager for --help and --ref
# The user can still enable by using --nopager=0 or --disable-nopager
dict set autosetup(optdefault) nopager 1

# Searches for a usable Tcl (prefer 8.6, 8.5, 8.4) in the given paths
# Returns a dictionary of the contents of the tclConfig.sh file, or
# empty if not found
proc parse-tclconfig-sh {args} {
	foreach p $args {
		# Allow pointing directly to the path containing tclConfig.sh
		if {[file exists $p/tclConfig.sh]} {
			return [parse-tclconfig-sh-file $p/tclConfig.sh]
		}
		# Some systems allow for multiple versions
		foreach libpath {lib/tcl8.6 lib/tcl8.5 lib/tcl8.4 lib/tcl tcl lib}  {
			if {[file exists $p/$libpath/tclConfig.sh]} {
				return [parse-tclconfig-sh-file $p/$libpath/tclConfig.sh]
			}
		}
	}
}

proc parse-tclconfig-sh-file {filename} {
	foreach line [split [readfile $filename] \n] {
		if {[regexp {^(TCL_[^=]*)=(.*)$} $line -> name value]} {
			set value [regsub -all {\$\{.*\}} $value ""]
			set tclconfig($name) [string trim $value ']
		}
	}
	return [array get tclconfig]
}

Deleted autosetup/pkg-config.tcl.

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# Copyright (c) 2016 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# @synopsis:
#
# The 'pkg-config' module allows package information to be found via 'pkg-config'.
#
# If not cross-compiling, the package path should be determined automatically
# by 'pkg-config'.
# If cross-compiling, the default package path is the compiler sysroot.
# If the C compiler doesn't support '-print-sysroot', the path can be supplied
# by the '--sysroot' option or by defining 'SYSROOT'.
#
# 'PKG_CONFIG' may be set to use an alternative to 'pkg-config'.

use cc

options {
	sysroot:dir => "Override compiler sysroot for pkg-config search path"
}

# @pkg-config-init ?required?
#
# Initialises the 'pkg-config' system. Unless '$required' is set to 0,
# it is a fatal error if a usable 'pkg-config' is not found .
#
# This command will normally be called automatically as required,
# but it may be invoked explicitly if lack of 'pkg-config' is acceptable.
#
# Returns 1 if ok, or 0 if 'pkg-config' not found/usable (only if '$required' is 0).
#
proc pkg-config-init {{required 1}} {
	if {[is-defined HAVE_PKG_CONFIG]} {
		return [get-define HAVE_PKG_CONFIG]
	}
	set found 0

	define PKG_CONFIG [get-env PKG_CONFIG pkg-config]
	msg-checking "Checking for pkg-config..."

	if {[catch {exec [get-define PKG_CONFIG] --version} version]} {
		msg-result "[get-define PKG_CONFIG] (not found)"
		if {$required} {
			user-error "No usable pkg-config"
		}
	} else {
		msg-result $version
		define PKG_CONFIG_VERSION $version

		set found 1

		if {[opt-str sysroot o]} {
			define SYSROOT [file-normalize $o]
			msg-result "Using specified sysroot [get-define SYSROOT]"
		} elseif {[get-define build] ne [get-define host]} {
			if {[catch {exec-with-stderr {*}[get-define CC] -print-sysroot} result errinfo] == 0} {
				# Use the compiler sysroot, if there is one
				define SYSROOT $result
				msg-result "Found compiler sysroot $result"
			} else {
				configlog "[get-define CC] -print-sysroot: $result"
				set msg "pkg-config: Cross compiling, but no compiler sysroot and no --sysroot supplied"
				if {$required} {
					user-error $msg
				} else {
					msg-result $msg
				}
				set found 0
			}
		}
		if {[is-defined SYSROOT]} {
			set sysroot [get-define SYSROOT]

			# XXX: It's possible that these should be set only when invoking pkg-config
			global env
			set env(PKG_CONFIG_DIR) ""
			# Supposedly setting PKG_CONFIG_LIBDIR means that PKG_CONFIG_PATH is ignored,
			# but it doesn't seem to work that way in practice
			set env(PKG_CONFIG_PATH) ""
			# Do we need to try /usr/local as well or instead?
			set env(PKG_CONFIG_LIBDIR) $sysroot/usr/lib/pkgconfig:$sysroot/usr/share/pkgconfig
			set env(PKG_CONFIG_SYSROOT_DIR) $sysroot
		}
	}
	define HAVE_PKG_CONFIG $found
	return $found
}

# @pkg-config module ?requirements?
#
# Use 'pkg-config' to find the given module meeting the given requirements.
# e.g.
#
## pkg-config pango >= 1.37.0
#
# If found, returns 1 and sets 'HAVE_PKG_PANGO' to 1 along with:
#
## PKG_PANGO_VERSION to the found version
## PKG_PANGO_LIBS    to the required libs (--libs-only-l)
## PKG_PANGO_LDFLAGS to the required linker flags (--libs-only-L)
## PKG_PANGO_CFLAGS  to the required compiler flags (--cflags)
#
# If not found, returns 0.
#
proc pkg-config {module args} {
	set ok [pkg-config-init]

	msg-checking "Checking for $module $args..."

	if {!$ok} {
		msg-result "no pkg-config"
		return 0
	}

	set pkgconfig [get-define PKG_CONFIG]

	set ret [catch {exec $pkgconfig --modversion "$module $args"} version]
	configlog "$pkgconfig --modversion $module $args: $version"
	if {$ret} {
		msg-result "not found"
		return 0
	}
	# Sometimes --modversion succeeds but because of dependencies it isn't usable
	# This seems to show up with --cflags
	set ret [catch {exec $pkgconfig --cflags $module} cflags]
	if {$ret} {
		msg-result "unusable ($version - see config.log)"
		configlog "$pkgconfig --cflags $module"
		configlog $cflags
		return 0
	}
	msg-result $version
	set prefix [feature-define-name $module PKG_]
	define HAVE_${prefix}
	define ${prefix}_VERSION $version
	define ${prefix}_CFLAGS $cflags
	define ${prefix}_LIBS [exec $pkgconfig --libs-only-l $module]
	define ${prefix}_LDFLAGS [exec $pkgconfig --libs-only-L $module]
	return 1
}

# @pkg-config-get module setting
#
# Convenience access to the results of 'pkg-config'.
#
# For example, '[pkg-config-get pango CFLAGS]' returns
# the value of 'PKG_PANGO_CFLAGS', or '""' if not defined.
proc pkg-config-get {module name} {
	set prefix [feature-define-name $module PKG_]
	get-define ${prefix}_${name} ""
}

# @pkg-config-get-var module variable
#
# Return the value of the given variable from the given pkg-config module.
# The module must already have been successfully detected with pkg-config.
# e.g.
#
## if {[pkg-config harfbuzz >= 2.5]} {
##   define harfbuzz_libdir [pkg-config-get-var harfbuzz libdir]
## }
#
# Returns the empty string if the variable isn't defined.
proc pkg-config-get-var {module variable} {
	set pkgconfig [get-define PKG_CONFIG]
	set prefix [feature-define-name $module HAVE_PKG_]
	exec $pkgconfig $module --variable $variable
}

Deleted autosetup/system.tcl.

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# Copyright (c) 2010 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# @synopsis:
#
# This module supports common system interrogation and options
# such as '--host', '--build', '--prefix', and setting 'srcdir', 'builddir', and 'EXEEXT'.
#
# It also support the "feature" naming convention, where searching
# for a feature such as 'sys/type.h' defines 'HAVE_SYS_TYPES_H'.
#
# It defines the following variables, based on '--prefix' unless overridden by the user:
#
## datadir
## sysconfdir
## sharedstatedir
## localstatedir
## infodir
## mandir
## includedir
#
# If '--prefix' is not supplied, it defaults to '/usr/local' unless 'defaultprefix' is defined *before*
# including the 'system' module.

if {[is-defined defaultprefix]} {
	user-notice "Note: defaultprefix is deprecated. Use options-defaults to set default options"
	options-defaults [list prefix [get-define defaultprefix]]
}

options {
	host:host-alias =>		{a complete or partial cpu-vendor-opsys for the system where
							the application will run (defaults to the same value as --build)}
	build:build-alias =>	{a complete or partial cpu-vendor-opsys for the system
							where the application will be built (defaults to the
							result of running config.guess)}
	prefix:dir=/usr/local => {the target directory for the build (default: '@default@')}

	# These (hidden) options are supported for autoconf/automake compatibility
	exec-prefix:
	bindir:
	sbindir:
	includedir:
	mandir:
	infodir:
	libexecdir:
	datadir:
	libdir:
	sysconfdir:
	sharedstatedir:
	localstatedir:
	runstatedir:
	maintainer-mode=0
	dependency-tracking=0
	silent-rules=0
}

# @check-feature name { script }
#
# defines feature '$name' to the return value of '$script',
# which should be 1 if found or 0 if not found.
#
# e.g. the following will define 'HAVE_CONST' to 0 or 1.
#
## check-feature const {
##     cctest -code {const int _x = 0;}
## }
proc check-feature {name code} {
	msg-checking "Checking for $name..."
	set r [uplevel 1 $code]
	define-feature $name $r
	if {$r} {
		msg-result "ok"
	} else {
		msg-result "not found"
	}
	return $r
}

# @have-feature name ?default=0?
#
# Returns the value of feature '$name' if defined, or '$default' if not.
#
# See 'feature-define-name' for how the "feature" name
# is translated into the "define" name.
#
proc have-feature {name {default 0}} {
	get-define [feature-define-name $name] $default
}

# @define-feature name ?value=1?
#
# Sets the feature 'define' to '$value'.
#
# See 'feature-define-name' for how the "feature" name
# is translated into the "define" name.
#
proc define-feature {name {value 1}} {
	define [feature-define-name $name] $value
}

# @feature-checked name
#
# Returns 1 if feature '$name' has been checked, whether true or not.
#
proc feature-checked {name} {
	is-defined [feature-define-name $name]
}

# @feature-define-name name ?prefix=HAVE_?
#
# Converts a "feature" name to the corresponding "define",
# e.g. 'sys/stat.h' becomes 'HAVE_SYS_STAT_H'.
#
# Converts '*' to 'P' and all non-alphanumeric to underscore.
#
proc feature-define-name {name {prefix HAVE_}} {
	string toupper $prefix[regsub -all {[^a-zA-Z0-9]} [regsub -all {[*]} $name p] _]
}

# @write-if-changed filename contents ?script?
#
# If '$filename' doesn't exist, or it's contents are different to '$contents',
# the file is written and '$script' is evaluated.
#
# Otherwise a "file is unchanged" message is displayed.
proc write-if-changed {file buf {script {}}} {
	set old [readfile $file ""]
	if {$old eq $buf && [file exists $file]} {
		msg-result "$file is unchanged"
	} else {
		writefile $file $buf\n
		uplevel 1 $script
	}
}


# @include-file infile mapping
#
# The core of make-template, called recursively for each @include
# directive found within that template so that this proc's result
# is the fully-expanded template.
#
# The mapping parameter is how we expand @varname@ within the template.
# We do that inline within this step only for @include directives which
# can have variables in the filename arg.  A separate substitution pass
# happens when this recursive function returns, expanding the rest of
# the variables.
#
proc include-file {infile mapping} {
	# A stack of true/false conditions, one for each nested conditional
	# starting with "true"
	set condstack {1}
	set result {}
	set linenum 0
	foreach line [split [readfile $infile] \n] {
		incr linenum
		if {[regexp {^@(if|else|endif)(\s*)(.*)} $line -> condtype condspace condargs]} {
			if {$condtype eq "if"} {
				if {[string length $condspace] == 0} {
					autosetup-error "$infile:$linenum: Invalid expression: $line"
				}
				if {[llength $condargs] == 1} {
					# ABC => [get-define ABC] ni {0 ""}
					# !ABC => [get-define ABC] in {0 ""}
					lassign $condargs condvar
					if {[regexp {^!(.*)} $condvar -> condvar]} {
						set op in
					} else {
						set op ni
					}
					set condexpr "\[[list get-define $condvar]\] $op {0 {}}"
				} else {
					# Translate alphanumeric ABC into [get-define ABC] and leave the
					# rest of the expression untouched
					regsub -all {([A-Z][[:alnum:]_]*)} $condargs {[get-define \1]} condexpr
				}
				if {[catch [list expr $condexpr] condval]} {
					dputs $condval
					autosetup-error "$infile:$linenum: Invalid expression: $line"
				}
				dputs "@$condtype: $condexpr => $condval"
			}
			if {$condtype ne "if"} {
				if {[llength $condstack] <= 1} {
					autosetup-error "$infile:$linenum: Error: @$condtype missing @if"
				} elseif {[string length $condargs] && [string index $condargs 0] ne "#"} {
					autosetup-error "$infile:$linenum: Error: Extra arguments after @$condtype"
				}
			}
			switch -exact $condtype {
				if {
					# push condval
					lappend condstack $condval
				}
				else {
					# Toggle the last entry
					set condval [lpop condstack]
					set condval [expr {!$condval}]
					lappend condstack $condval
				}
				endif {
					if {[llength $condstack] == 0} {
						user-notice "$infile:$linenum: Error: @endif missing @if"
					}
					lpop condstack
				}
			}
			continue
		} elseif {[regexp {^@include\s+(.*)} $line -> filearg]} {
			set incfile [string map $mapping $filearg]
			if {[file exists $incfile]} {
				lappend ::autosetup(deps) [file-normalize $incfile]
				lappend result {*}[include-file $incfile $mapping]
			} else {
				user-error "$infile:$linenum: Include file $incfile is missing"
			}
			continue
		} elseif {[regexp {^@define\s+(\w+)\s+(.*)} $line -> var val]} {
			define $var $val
			continue
		}
		# Only output this line if the stack contains all "true"
		if {"0" in $condstack} {
			continue
		}
		lappend result $line
	}
	return $result
}


# @make-template template ?outfile?
#
# Reads the input file '<srcdir>/$template' and writes the output file '$outfile'
# (unless unchanged).
# If '$outfile' is blank/omitted, '$template' should end with '.in' which
# is removed to create the output file name.
#
# Each pattern of the form '@define@' is replaced with the corresponding
# "define", if it exists, or left unchanged if not.
#
# The special value '@srcdir@' is substituted with the relative
# path to the source directory from the directory where the output
# file is created, while the special value '@top_srcdir@' is substituted
# with the relative path to the top level source directory.
#
# Conditional sections may be specified as follows:
## @if NAME eq "value"
## lines
## @else
## lines
## @endif
#
# Where 'NAME' is a defined variable name and '@else' is optional.
# Note that variables names *must* start with an uppercase letter.
# If the expression does not match, all lines through '@endif' are ignored.
#
# The alternative forms may also be used:
## @if NAME  (true if the variable is defined, but not empty and not "0")
## @if !NAME  (opposite of the form above)
## @if <general-tcl-expression>
#
# In the general Tcl expression, any words beginning with an uppercase letter
# are translated into [get-define NAME]
#
# Expressions may be nested
#
proc make-template {template {out {}}} {
	set infile [file join $::autosetup(srcdir) $template]

	if {![file exists $infile]} {
		user-error "Template $template is missing"
	}

	# Define this as late as possible
	define AUTODEPS $::autosetup(deps)

	if {$out eq ""} {
		if {[file ext $template] ne ".in"} {
			autosetup-error "make_template $template has no target file and can't guess"
		}
		set out [file rootname $template]
	}

	set outdir [file dirname $out]

	# Make sure the directory exists
	file mkdir $outdir

	# Set up srcdir and top_srcdir to be relative to the target dir
	define srcdir [relative-path [file join $::autosetup(srcdir) $outdir] $outdir]
	define top_srcdir [relative-path $::autosetup(srcdir) $outdir]

	# Build map from global defines to their values so they can be
	# substituted into @include file names.
	proc build-define-mapping {} {
		set mapping {}
		foreach {n v} [array get ::define] {
			lappend mapping @$n@ $v
		}
		return $mapping
	}
	set mapping [build-define-mapping]

	set result [include-file $infile $mapping]

	# Rebuild the define mapping in case we ran across @define
	# directives in the template or a file it @included, then
	# apply that mapping to the expanded template.
	set mapping [build-define-mapping]
	write-if-changed $out [string map $mapping [join $result \n]] {
		msg-result "Created [relative-path $out] from [relative-path $template]"
	}
}

# build/host tuples and cross-compilation prefix
opt-str build build ""
define build_alias $build
if {$build eq ""} {
	define build [config_guess]
} else {
	define build [config_sub $build]
}

opt-str host host ""
define host_alias $host
if {$host eq ""} {
	define host [get-define build]
	set cross ""
} else {
	define host [config_sub $host]
	set cross $host-
}
define cross [get-env CROSS $cross]

# build/host _cpu, _vendor and _os
foreach type {build host} {
	set v [get-define $type]
	if {![regexp {^([^-]+)-([^-]+)-(.*)$} $v -> cpu vendor os]} {
		user-error "Invalid canonical $type: $v"
	}
	define ${type}_cpu $cpu
	define ${type}_vendor $vendor
	define ${type}_os $os
}

opt-str prefix prefix /usr/local

# These are for compatibility with autoconf
define target [get-define host]
define prefix $prefix
define builddir $autosetup(builddir)
define srcdir $autosetup(srcdir)
define top_srcdir $autosetup(srcdir)
define abs_top_srcdir [file-normalize $autosetup(srcdir)]
define abs_top_builddir [file-normalize $autosetup(builddir)]

# autoconf supports all of these
define exec_prefix [opt-str exec-prefix exec_prefix $prefix]
foreach {name defpath} {
	bindir /bin
	sbindir /sbin
	libexecdir /libexec
	libdir /lib
} {
	define $name [opt-str $name o $exec_prefix$defpath]
}
foreach {name defpath} {
	datadir /share
	sharedstatedir /com
	infodir /share/info
	mandir /share/man
	includedir /include
} {
	define $name [opt-str $name o $prefix$defpath]
}
if {$prefix ne {/usr}} {
	opt-str sysconfdir sysconfdir $prefix/etc
} else {
	opt-str sysconfdir sysconfdir /etc
}
define sysconfdir $sysconfdir

define localstatedir [opt-str localstatedir o /var]
define runstatedir [opt-str runstatedir o /run]

define SHELL [get-env SHELL [find-an-executable sh bash ksh]]

# These could be used to generate Makefiles following some automake conventions
define AM_SILENT_RULES [opt-bool silent-rules]
define AM_MAINTAINER_MODE [opt-bool maintainer-mode]
define AM_DEPENDENCY_TRACKING [opt-bool dependency-tracking]

# Windows vs. non-Windows
switch -glob -- [get-define host] {
	*-*-ming* - *-*-cygwin - *-*-msys {
		define-feature windows
		define EXEEXT .exe
	}
	default {
		define EXEEXT ""
	}
}

# Display
msg-result "Host System...[get-define host]"
msg-result "Build System...[get-define build]"

Deleted autosetup/tmake.auto.

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# Copyright (c) 2016 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# Auto-load module for 'tmake' build system integration

use init

autosetup_add_init_type tmake "Tcl-based tmake build system" {
	autosetup_check_create auto.def \
{# Initial auto.def created by 'autosetup --init=tmake'
# vim:set syntax=tcl:

use cc cc-lib cc-db cc-shared
use tmake

# Add any user options here
# Really want a --configure that takes over the rest of the command line
options {
}

cc-check-tools ar ranlib

set objdir [get-env BUILDDIR objdir]

make-config-header $objdir/include/autoconf.h
make-tmake-settings $objdir/settings.conf {[A-Z]*} *dir lib_*
}

	autosetup_check_create project.spec \
{# Initial project.spec created by 'autosetup --init=tmake'

tmake-require-version 0.7.3

# vim:set syntax=tcl:
define? DESTDIR _install

# XXX If configure creates additional/different files than include/autoconf.h
#     that should be reflected here
Autosetup include/autoconf.h

# e.g. for autoconf.h
IncludePaths include

ifconfig !CONFIGURED {
	# Not configured, so don't process subdirs
	AutoSubDirs off
	# And don't process this file any further
	ifconfig false
}
}

	if {![file exists build.spec]} {
		puts "Note: I don't see build.spec. Try running: tmake --genie"
	}
}

Deleted autosetup/tmake.tcl.

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# Copyright (c) 2011 WorkWare Systems http://www.workware.net.au/
# All rights reserved

# @synopsis:
#
# The 'tmake' module makes it easy to support the tmake build system.
#
# The following variables are set:
#
## CONFIGURED  - to indicate that the project is configured

use system

options {}

define CONFIGURED

# @make-tmake-settings outfile patterns ...
#
# Examines all defined variables which match the given patterns (defaults to '*')
# and writes a tmake-compatible .conf file defining those variables.
# For example, if 'ABC' is '"3 monkeys"' and 'ABC' matches a pattern, then the file will include:
#
## define ABC {3 monkeys}
#
# If the file would be unchanged, it is not written.
#
# Typical usage is:
#
## make-tmake-settings [get-env BUILDDIR objdir]/settings.conf {[A-Z]*}
proc make-tmake-settings {file args} {
	file mkdir [file dirname $file]
	set lines {}

	if {[llength $args] == 0} {
		set args *
	}

	foreach n [lsort [dict keys [all-defines]]] {
		foreach p $args {
			if {[string match $p $n]} {
				set value [get-define $n]
				lappend lines "define $n [list $value]"
				break
			}
		}
	}
	set buf [join $lines \n]
	write-if-changed $file $buf {
		msg-result "Created $file"
	}
}

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########################################################################
# Routines for Steve Bennett's autosetup which are common to trees
# managed under the umbrella of wanderinghorse.net.
#
# In the interest of assisting to keep multiple copies of this file
# up to date:s
#
# The "canonical" version is the one in libfossil:
#
#  https://fossil.wanderinghorse.net/r/libfossil/finfo?name=autosetup/wh-common.tcl
########################################################################

array set whcache {} ; # used for caching various results.

########################################################################
# wh-lshift shifts $count elements from the list named $listVar and
# returns them.
#
# Modified slightly from: https://wiki.tcl-lang.org/page/lshift
#
# On an empty list, returns "".
proc wh-lshift {listVar {count 1}} {
    upvar 1 $listVar l
    if {![info exists l]} {
        # make the error message show the real variable name
        error "can't read \"$listVar\": no such variable"
    }
    if {![llength $l]} {
        # error Empty
        return ""
    }
    set r [lrange $l 0 [incr count -1]]
    set l [lreplace $l [set l 0] $count]
    return $r
}

########################################################################
# A proxy for cc-check-function-in-lib which "undoes" any changes that
# routine makes to the LIBS define. Returns the result of
# cc-check-function-in-lib.
proc wh-check-function-in-lib {function libs {otherlibs {}}} {
    set _LIBS [get-define LIBS]
    set found [cc-check-function-in-lib $function $libs $otherlibs]
    define LIBS $_LIBS
    return $found
}

########################################################################
# Look for binary named $binName and `define`s $defName to that full
# path, or an empty string if not found. Returns the value it defines.
# This caches the result for a given $binName/$defName combination, so
# calls after the first for a given combination will always return the
# same result.
#
# If defName is empty then "BIN_X" is used, where X is the upper-case
# form of $binName with any '-' characters removed.
proc wh-bin-define {binName {defName {}}} {
    global whcache
    set cacheName "$binName:$defName"
    set check {}
    if {[info exists whcache($cacheName)]} {
        set check $whcache($cacheName)
    }
    msg-checking "Looking for $binName ... "
    if {"" ne $check} {
        set lbl $check
        if {" _ 0 _ " eq $check} {
            set lbl "not found"
            set check ""
        }
        msg-result "(cached) $lbl"
        return $check
    }
    set check [find-executable-path $binName]
    if {"" eq $check} {
        msg-result "not found"
        set whcache($cacheName) " _ 0 _ "
    } else {
        msg-result $check
        set whcache($cacheName) $check
    }
    if {"" eq $defName} {
        set defName "BIN_[string toupper [string map {- {}} $binName]]"
    }
    define $defName $check
    return $check
}

########################################################################
# Looks for `bash` binary and dies if not found. On success, defines
# BIN_BASH to the full path to bash and returns that value. We
# _require_ bash because it's the SHELL value used in our makefiles.
proc wh-require-bash {} {
    set bash [wh-bin-define bash]
    if {"" eq $bash} {
        user-error "Our Makefiles require the bash shell."
    }
    return $bash
}

########################################################################
# Internal impl for wh-opt-bool-01 and wh-opt-bool-01-invert.
#
# args = {optName defName invert {descr {}}}
proc wh-opt-bool-01-impl {args} {
}


########################################################################
# Args: [-v] optName defName {descr {}}
#
# Checks [opt-bool $optName] and does [define $defName X] where X is 0
# for false and 1 for true. descr is an optional [msg-checking]
# argument which defaults to $defName. Returns X.
#
# If args[0] is -v then the boolean semantics are inverted: if
# the option is set, it gets define'd to 0, else 1. Returns the
# define'd value.
proc wh-opt-bool-01 {args} {
    set invert 0
    if {[lindex $args 0] eq "-v"} {
		set invert 1
		set args [lrange $args 1 end]
	}
    set optName [wh-lshift args]
    set defName [wh-lshift args]
    set descr [wh-lshift args]
    if {"" eq $descr} {
        set descr $defName
    }
    set rc 0
    msg-checking "$descr ... "
    if {[opt-bool $optName]} {
        if {0 eq $invert} {
            set rc 1
        } else {
            set rc 0
        }
    } elseif {0 ne $invert} {
        set rc 1
    }
    msg-result $rc
    define $defName $rc
    return $rc
}


########################################################################
# Curses!
#
# Jumps through numerous hoops to try to find ncurses libraries and
# appropriate compilation/linker flags. Returns 0 on failure, 1 on
# success, and defines (either way) LIB_CURSES to the various linker
# flags and CFLAGS_CURSES to the various CFLAGS (both empty strings if
# no lib is found).
#
# This impl prefers to use pkg-config to find ncurses and libpanel
# because various platforms either combine, or not, the wide-char
# versions of those libs into the same library (or not). If no
# pkg-config is available, OR the platform looks like Mac, then we
# simply make an educated guess and hope it works. On Mac pkg-config
# is not sufficient because the core system and either brew or
# macports can contain mismatched versions of ncurses and iconv, so on
# that platform we simply guess from the core system level, ignoring
# brew/macports options.
proc wh-check-ncurses {} {
    set pcBin [wh-bin-define pkg-config]
    msg-checking "Looking for \[n]curses... "
    set LIB_CURSES ""
    set CFLAGS_CURSES ""
    set rc 0
    if {"" ne $pcBin && $::tcl_platform(os)!="Darwin"} {
        # Some macOS pkg-config configurations alter library search paths, which make
        # the compiler unable to find lib iconv, so don't use pkg-config on macOS.
        set np ""
        foreach p {ncursesw ncurses} {
            if {[catch {exec $pcBin --exists $p}]} {
                continue
            }
            set np $p
            msg-result "Using pkg-config curses package \[$p]"
            break
        }
        if {"" ne $np} {
            set ppanel ""
            if {"ncursesw" eq $np} {
                if {![catch {exec $pcBin --exists panelw}]} {
                    set ppanel panelw
                }
            }
            if {"" eq $ppanel && ![catch {exec $pcBin --exists panel}]} {
                set ppanel panel
            }
            set CFLAGS_CURSES [exec $pcBin --cflags $np]
            set LIB_CURSES [exec $pcBin --libs $np]
            if {"" eq $ppanel} {
                # Apparently Mac brew has pkg-config for ncursesw but not
                # panel/panelw, but hard-coding -lpanel seems to work on
                # that platform.
                append LIB_CURSES " -lpanel"
            } else {
                append LIB_CURSES " " [exec $pcBin --libs $ppanel]
                # append CFLAGS_CURSES " " [exec $pcBin --cflags $ppanel]
                # ^^^^ appending the panel cflags will end up duplicating
                # at least one -D flag from $np's cflags, leading to
                # "already defined" errors at compile-time. Sigh. Note, however,
                # that $ppanel's cflags have flags which $np's do not, so we
                # may need to include those flags anyway and manually perform
                # surgery on the list to remove dupes. Sigh.
            }
        }
    }

    if {"" eq $LIB_CURSES} {
        puts "Guessing curses location (will fail for exotic locations)..."
        define HAVE_CURSES_H [cc-check-includes curses.h]
        if {[get-define HAVE_CURSES_H]} {
            # Linux has -lncurses, BSD -lcurses. Both have <curses.h>
            msg-result "Found curses.h"
            if {[wh-check-function-in-lib waddnwstr ncursesw]} {
                msg-result "Found -lncursesw"
                set LIB_CURSES "-lncursesw -lpanelw"
            } elseif {[wh-check-function-in-lib initscr ncurses]} {
                msg-result "Found -lncurses"
                set LIB_CURSES "-lncurses -lpanel"
            } elseif {[wh-check-function-in-lib initscr curses]} {
                msg-result "Found -lcurses"
                set LIB_CURSES "-lcurses -lpanel"
            }
        }
    }
    if {"" ne $LIB_CURSES} {
        set rc 1
        puts {************************************************************
If your build of fails due to missing ncurses functions
such as waddwstr(), make sure you have the ncursesw (with a
"w") development package installed. Some platforms combine
the "w" and non-w curses builds and some don't. Similarly,
it's easy to get a mismatch between libncursesw and libpanel,
so make sure you have libpanelw (if appropriate for your
platform).

The package may have a name such as libncursesw5-dev or
some such.
************************************************************}
    }
    define LIB_CURSES $LIB_CURSES
    define CFLAGS_CURSES $CFLAGS_CURSES
    return $rc
}
# /wh-check-ncurses
########################################################################

########################################################################
# Check for module-loading APIs (libdl/libltdl)...
#
# Looks for libltdl or dlopen(), the latter either in -ldl or built in
# to libc (as it is on some platforms. Returns 1 if found, else
# 0. Either way, it `define`'s:
#
#  - HAVE_LIBLTDL to 1 or 0 if libltdl is found/not found
#  - HAVE_LIBDL to 1 or 0 if dlopen() is found/not found
#  - LDFLAGS_MODULE_LOADER one of ("-lltdl", "-ldl", or ""), noting that
#    the string may legally be empty on some platforms if HAVE_LIBDL is true.
proc wh-check-module-loader {} {
    msg-checking "Looking for module-loader APIs... "
    if {99 ne [get-define LDFLAGS_MODULE_LOADER]} {
        if {1 eq [get-define HAVE_LIBLTDL 0]} {
            msg-result "(cached) libltdl"
            return 1
        } elseif {1 eq [get-define HAVE_LIBDL 0]} {
            msg-result "(cached) libdl"
            return 1
        }
        # else: wha???
    }
    set HAVE_LIBLTDL 0
    set HAVE_LIBDL 0
    set LDFLAGS_MODULE_LOADER ""
    set rc 0
    puts "" ;# cosmetic kludge for cc-check-XXX
    if {[cc-check-includes ltdl.h] && [cc-check-function-in-lib lt_dlopen ltdl]} {
        set HAVE_LIBLTDL 1
        set LDFLAGS_MODULE_LOADER "-lltdl"
        puts " - Got libltdl."
        set rc 1
    } elseif {[cc-with {-includes dlfcn.h} {
        cctest -link 1 -declare "extern char* dlerror(void);" -code "dlerror();"}]} {
        puts " - This system can use dlopen() w/o -ldl."
        set HAVE_LIBDL 1
        set LDFLAGS_MODULE_LOADER ""
        set rc 1
    } elseif {[cc-check-includes dlfcn.h]} {
        set HAVE_LIBDL 1
        set rc 1
        if {[cc-check-function-in-lib dlopen dl]} {
            puts " - dlopen() needs libdl."
            set LDFLAGS_MODULE_LOADER "-ldl"
        } else {
            puts " - dlopen() not found in libdl. Assuming dlopen() is built-in."
            set LDFLAGS_MODULE_LOADER ""
        }
    }
    define HAVE_LIBLTDL $HAVE_LIBLTDL
    define HAVE_LIBDL $HAVE_LIBDL
    define LDFLAGS_MODULE_LOADER $LDFLAGS_MODULE_LOADER
    return $rc
}


########################################################################
# Opens the given file, reads all of its content, and returns it.
proc wh-file-content {fname} {
    set fp [open $fname r]
    set rc [read $fp]
    close $fp
    return $rc
}

########################################################################
# Returns the contents of the given file as an array, with the EOL
# stripped from each input line.
proc wh-file-content-list {fname} {
    set fp [open $fname r]
    set rc {}
    while { [gets $fp line] >= 0 } {
        lappend rc $line
    }
    return $rc
}

########################################################################
# Checks the compiler for compile_commands.json support. If passed an
# argument it is assumed to be the name of an autosetup boolean config
# option to explicitly DISABLE the compile_commands.json support.
#
# Returns 1 if supported, else 0. Defines MAKE_COMPILATION_DB to "yes"
# if supported, "no" if not.
proc wh-check-compile-commands {{configOpt {}}} {
    msg-checking "compile_commands.json support... "
    if {"" ne $configOpt && [opt-bool $configOpt]} {
        msg-result "explicitly disabled"
        define MAKE_COMPILATION_DB no
        return 0
    } else {
        if {[cctest -lang c -cflags {/dev/null -MJ} -source {}]} {
            # This test reportedly incorrectly succeeds on one of
            # Martin G.'s older systems.
            msg-result "compiler supports compile_commands.json"
            define MAKE_COMPILATION_DB yes
            return 1
        } else {
            msg-result "compiler does not support compile_commands.json"
            define MAKE_COMPILATION_DB no
            return 0
        }
    }
}

########################################################################
# Uses [make-template] to creates makefile(-like) file $filename from
# $filename.in but explicitly makes the output read-only, to avoid
# inadvertent editing (who, me?).
#
# The second argument is an optional boolean specifying whether to
# `touch` the generates files. This can be used as a workaround for
# cases where (A) autosetup does not update the file because it was
# not really modified and (B) the file *really* needs to be updates to
# the please build process. Pass any non-0 value to enable touching.
#
# The argument may be a list of filenames.
proc wh-make-from-dot-in {filename {touch 0}} {
  foreach f $filename {
    catch { exec chmod u+w $f }
    make-template $f.in $f
    if {0 != $touch} {
      puts "Touching $f"
      catch { exec touch $f }
    }
    catch { exec chmod u-w $f }
  }
}

########################################################################
# Checks for the boolean configure option named by $flagname. If set,
# it checks if $CC seems to refer to gcc. If it does (or appears to)
# then it defines CC_PROFILE_FLAG to "-pg" and returns 1, else it
# defines CC_PROFILE_FLAG to "" and returns 0.
#
# Note that the resulting flag must be added to both CFLAGS and
# LDFLAGS in order for binaries to be able to generate "gmon.out".  In
# order to avoid potential problems with escaping, space-containing
# tokens, and interfering with autosetup's use of these vars, this
# routine does not directly modify CFLAGS or LDFLAGS.
proc wh-check-profile-flag {{flagname profile}} {
  if {[opt-bool $flagname]} {
    set CC [get-define CC]
    regsub {.*ccache *} $CC "" CC
    # ^^^ if CC="ccache gcc" then [exec] treats "ccache gcc" as a
    # single binary name and fails. So strip any leading ccache part
    # for this purpose.
    if { ![catch { exec $CC --version } msg]} {
      if {[string first gcc $CC] != -1} {
        define CC_PROFILE_FLAG "-pg"
        return 1
      }
    }
  }
  define CC_PROFILE_FLAG ""
  return 0
}

Changes to compile_flags.txt.

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-std=c89
-I
include
-I
src
lib
-isystem
/usr/local/include
-isystem
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.0/include
-isystem
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
-isystem
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
-isystem
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks

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# Example of a typical Makefile template for autosetup

# Tools. CC is standard. The rest are via cc-check-tools
CC = @CC@
RANLIB = @RANLIB@
AR = @AR@
STRIP = @STRIP@

# FLAGS/LIBS
CFLAGS += @CFLAGS@ @CC_PROFILE_FLAG@
LDFLAGS += @LDFLAGS@ @CC_PROFILE_FLAG@
LDLIBS += @LIBS@
#LDLIBS += -lsqlite3 -lz
LDFLAGS_MODULE_LOADER += @LDFLAGS_MODULE_LOADER@

# ??? HAVE_DLOPEN := @HAVE_DLOPEN@
HAVE_LIBDL := @HAVE_LIBDL@
HAVE_LIBLTDL := @HAVE_LIBLTDL@
#HAVE_LT_DLOPEN := @HAVE_LT_DLOPEN@

ENABLE_MODULES ?= @FSL_ENABLE_MODULE_LOADER@
#ifeq (1,$(HAVE_DLOPEN))
#  ENABLE_MODULES := 1
#endif
#ifeq (1,$(HAVE_LT_DLOPEN))
#  ENABLE_MODULES := 1
#endif

# Install destination
prefix := @prefix@
exec_prefix = @exec_prefix@
DESTDIR ?=

CONFIG.MAKE := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
#TOP_SRCDIR_ABS := $(dir $(realpath $(CONFIG.MAKE)))
TOP_SRCDIR_REL := $(patsubst %/,%,$(dir $(CONFIG.MAKE)))
TOP_SRCDIR_ABS := $(realpath $(TOP_SRCDIR_REL))
#$(error TOP_SRCDIR_REL=$(TOP_SRCDIR_REL))

SRC.DIR := $(TOP_SRCDIR_REL)/src

# Project-specific CFLAGS
TOP_INCDIR := $(TOP_SRCDIR_REL)/include
COMPAT_DIR := $(TOP_SRCDIR_REL)/compat
#CPPFLAGS += -D_GNU_SOURCE -Wall -Werror -I. -I$(TOP_INCDIR)
CPPFLAGS += -I. -I$(TOP_INCDIR) -I$(SRC.DIR)
# -I$(COMPAT_DIR)/javavm/export -I$(COMPAT_DIR)/tcl-8.6/generic
ifneq (,$(wildcard $(HOME)/include/*))
  # This is admittedly primarily for my own sake!
  CPPFLAGS += -I$(HOME)/include
endif

ifeq (,$(filter tcc,$(CC)))
  # Assume gcc-compatible compilation flags...
  CFLAGS += -Wall -Werror -Wsign-compare -pedantic
#??? -fno-strict-aliasing
  CFLAGS += @CC_FLAG_C99@
endif
# /tcc

# Enable MAKE_COMPILATION_DB = yes to generate a JSON compilation database. For
# each *.c source file being compiled, a corresponding JSON file will be created
# in the './compile_commands' sub-directory, and will be used to generate the
# 'compile_commands.json' compilation database in the repository root. This is
# only available with compilers that support the '-MJ' option (e.g., clang).
MAKE_COMPILATION_DB = @MAKE_COMPILATION_DB@


FSL_ENABLE_READLINE := @FSL_ENABLE_READLINE@
LDFLAGS_READLINE := @lib_readline@

ifeq ($(MAKE_COMPILATION_DB),yes)
compdb_dir = compile_commands
mkdir_compdb = $(TOP_SRCDIR_REL)/$(compdb_dir)
$(mkdir_compdb):
	@mkdir -p $@

compdb_file = $(TOP_SRCDIR_REL)/$(compdb_dir)/$(subst /,-,$@.json)
compdb_args = -MJ $(compdb_file)
CFLAGS += $(compdb_args)
else
mkdir_compdb =
endif


CLEAN_FILES += *.o lib*.a *.so

ShakeNMake.QUIET ?= @BUILD_QUIETLY@
ShakeNMake.BIN.INSTALL := @BIN_INSTALL@

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#!/bin/sh
dir="`dirname "$0"`/autosetup"
WRAPPER="$0"; export WRAPPER; exec "`"$dir/autosetup-find-tclsh"`" "$dir/autosetup" "$@"

Deleted fnc/Makefile.in.

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all:
include ../subdir-inc.make
LIB_CURSES := @LIB_CURSES@
ifeq (,$(LIB_CURSES))
$(error Expecting LIB_CURSES to be set by the configure process.)
endif
CFLAGS_CURSES := @CFLAGS_CURSES@
LIBF_DIR := $(TOP_DIR)/src
CPPFLAGS += -I$(LIBF_DIR) $(CFLAGS_CURSES)
DISTCLEAN_FILES += Makefile

########################################################################
# To build fnc, we need the curses and pthread libraries.
# -lz is for libfossil
# -liconv is for libfossil on macOS
# -lutil is... ???
# -lm is for sqlite3
FNC_LDFLAGS := $(LIBF_DIR)/libfossil.o $(LIBF_DIR)/sqlite3.o
PLATFORM := $(shell sh -c 'uname 2>/dev/null || echo Unknown')
ifneq ($(filter $(PLATFORM),Darwin),)
  FNC_LDFLAGS += -liconv
endif
FNC_LDFLAGS += -lm
FNC_LDFLAGS += $(LIB_CURSES) -lutil -lz -lpthread

# This is needed for Mac builds, else they don't see the
# wide-char curses APIs:
CPPFLAGS += -D_XOPEN_SOURCE_EXTENDED

fnc.BIN.OBJECTS += fnc.o
fnc.BIN.LDFLAGS := $(FNC_LDFLAGS)
$(eval $(call ShakeNMake.CALL.RULES.BIN,fnc))
all: $(fnc.BIN)

ShakeNMake.install.bins := $(fnc.BIN)
ShakeNMake.install.man1 := fnc.1

Deleted fnc/fnc.1.

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.\"
.\" Copyright (c) 2021 Mark Jamsek <mark@jamsek.com>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate$
.Dt FNC 1
.Os
.Sh NAME
.Nm fnc
.Nd Read-only ncurses-based Fossil repository browser
.Sh SYNOPSIS
.Nm
.Op Ar command
.Op Fl h | -help
.Nm
.Op Fl h | -help
.Op Fl v | -version
.Nm
.Cm timeline
.Op Fl Cz
.Op Fl T Ar tag
.Op Fl b Ar branch
.Op Fl c Ar commit
.Op Fl n Ar number
.Op Fl t Ar type
.Op Fl u Ar user
.Op Ar path
.Nm
.Cm diff
.Op Fl Ciw
.Op Fl x Ar number
.Op Ar artifact1 Op Ar artifact2
.Op Ar path ...
.Nm
.Cm tree
.Op Fl C
.Op Fl c Ar commit
.Op Ar path
.Nm
.Cm blame
.Op Fl C
.Op Fl c Ar commit Op Fl r
.Op Fl n Ar number
.Ar path
.Nm
.Cm branch
.Op Fl Ccopr
.Op Fl a Ar date | Fl b Ar date
.Op Fl s Ar order
.Op Ar glob
.Nm
.Op Ar path
.Sh DESCRIPTION
.Nm
is an interactive read-only browser for
.Xr fossil 1
repositories,
and supports multiple views to display repository data:
.Bl -tag -width Ds
.It Timeline view
Display commits from the repository's history in chronologically
descending order.
.Br
If no
.Ar command
or
.Ar arg
are specified, or just a
.Ar path
is passed,
.Nm
will default to displaying this view.
.It Diff view
Display changes introduced in the specified commit, or between two repository
artifacts.
.It Tree view
Display navigable tree reflecting the repository state as at the specified
commit.
.It Blame view
Display and annotate each line in the given file with the hyperlinked historical
version that last modified the line.
.It Branch view
Display navigable list of all repository branches.
.El
.Pp
.Nm
provides both global and command-specific options and in-app key
bindings.  Global options are specified absent a command name, and
are as follows:
.Bl -tag -width 6v
.It Fl h , -help
Display program help and usage information then exit.
.It Fl v , -version
Display program version then exit.
.El
.Pp
Note that any global options preceding a command name will be
interpreted as the command-specific variant if such an option exists.
.Pp
Global key bindings are as follows:
.Bl -tag -width Ds
.It Cm H, ?, F1
Open in-app help.
.It Cm Tab
Switch focus between open views.
.It Cm f
Toggle the active view between fullscreen and splitscreen mode.  Note
that
.Nm
will open nested views in splitscreen mode if the terminal window is
equal to or greater than 110 columns wide.
.It Cm Q
Immediatey quit
.Nm .
.It Cm q
Quit the active view.
.El
.Pp
Commands available to
.Nm
are as follows:
.Bl -tag -width 4v
.Tg log
.It Cm timeline Oo Fl C | -no-colour Oc Oo Fl T | -tag Ar tag Oc \
Oo Fl b | -branch Ar branch Oc Oo Fl c | -commit Ar commit Oc \
Oo Fl h | -help Oc  Oo Fl n | -limit Ar n Oc  Oo Fl t | -type Ar type Oc \
Oo Fl u | -username Ar user Oc Oo Fl z | -utc Oc  Op Ar path
.Dl (aliases: Cm log , Cm tl , Cm time , Cm ti )
Display commit history of a repository.  If
.Ar path
is specified, only commits that modified the file(s) at this path will populate
the timeline.  The
.Ar path
may be absolute, relative to the current working directory, or relative to the
repository root.  This command must be executed from within or below the top
level directory of the repository; that is,
.Nm
assumes a local checkout is open in or above the current working directory.
.Pp
If no command is explicitly specified, this command will be executed by
default.
.Pp
Options for
.Cm fnc timeline
are as follows:
.Bl -tag -width Ds
.It Fl C , -no-colour
Disable colourised timeline, which is enabled by default on supported
terminals. If this option is not used, colour can be toggled with the
.Sy c
timeline view key binding as documented below.
.It Fl T , -tag Ar tag
Only display commits with T cards containing
.Ar tag .
By default,
.Nm
will indiscriminately display all commits irrespective of which T cards
are attached to the commit manifest.
.It Fl b , -branch Ar branch
Display commits that are members of the specified
.Ar branch .
The expected argument is the symbolic name of a branch. By default,
.Nm
will display all commits irrespective of the branch on which they
reside.
.It Fl c , -commit Ar commit
Open the timeline from the check-in identified by
.Ar commit .
The expected argument is either the name of a branch, which will resolve
to the latest commit on the given branch, or (a unique abbreviated
prefix of) a valid commit UUID SHA1 or SHA3 hash. When this option is
not supplied,
.Nm
will open the timeline to the latest leaf on the repository tree.  For a
complete list of valid arguments this option accepts, see
.Lk https://fossil-scm.org/home/doc/trunk/www/checkin_names.wiki \
"Fossil's Check-in Names".
.It Fl h , -help
Display timeline command help and usage information then exit.
.It Fl n , -limit Ar n
Limit timeline to the
latest
.Ar n
commits.
By default,
.Nm
will load the entire history of the repository's local checkout.
Negative values are a no-op.
.It Fl t , -type Ar type
Only display
.Ar type
commits. Valid
.Ar type
values are as follows:
.Bl -column YXZ description
.Sy ci Ta check-in
.Sy w Ta wiki
.Sy t Ta ticket
.Sy e Ta technote
.Sy f Ta forum post
.El
.Pp
By default, when this option is not supplied,
.Nm
will indiscriminately load all commits irrespective of
.Ar type .
Note that this is a repeatable flag (e.g.,
.Nm
.Cm timeline
.Cm -t e -t t Ns
).
.It Fl u , -username Ar user
Only display commits authored by
.Ar user .
.It Fl z , -utc
Use Coordinated Universal Time (UTC) rather than local time when
displaying commit dates and timestamps.
.El
.Pp
Key bindings for
.Cm fnc timeline
are as follows:
.Bl -tag -width Ds
.It Cm Arrow-down, j, >, \&.
Move selection cursor down the timeline.
.It Cm Arrow-up, k, <, \&,
Move selection cursor up the timeline.
.It Cm Ctrl+f, Page-down
Move selection cursor one page down the timeline.
.It Cm Ctrl+b, Page-up
Move selection cursor one page up the timeline.
.It Cm G, End
Move selection cursor to the last commit on the timeline (i.e., oldest commit
in the repository).
.It Cm gg, Home
Move selection cursor to the first commit on the timeline (i.e., newest commit
in the repository).
.It Cm Enter, Space
Open a
.Cm diff
view displaying the changeset of the currently selected commit.
.It Cm c
Toggle colourised timeline. On supported terminals,
.Nm
will default to displaying the timeline in colour.
.It Cm t
Display the tree of the repository corresponding to the currently selected
commit.
.It Cm /
Prompt to enter a search term to begin searching for commits matching
the pattern provided.  The search term is an extended regular expression,
which is cross-referenced against a commit's comment, the username of
its author, branch, and UUID SHA1 or SHA3 hash.  See
.Xr re_format 7
for regular expression syntax.
.It Cm n
Find the next commit that matches the current search term.  The search
will continue until either a match is found or the earliest commit on
the timeline is consumed.
.It Cm N
Find the previous commit that matches the current search term.  The
search will continue until either a match is found or the latest commit
on the timeline is consumed.
.El
.Tg di
.It Cm diff Oo Fl C | -no-colour Oc Oo Fl h | -help Oc Oo Fl i | -invert \
Oc Oo Fl w | -whitespace Oc Oo Fl x | -context Ar n Oc \
Oo Ar artifact1 Oo Ar artifact2 Oc Oc Op Ar path ...
.Dl (alias: Cm di )
Display the differences between two repository artifacts, or between the local
changes on disk and a given commit.  If neither
.Ar artifact1
nor
.Ar artifact2
are specified,
.Nm
will diff the local changes on disk against the version on which the current
checkout is based.  If only
.Ar artifact1
is specified,
.Nm
will diff the current checkout, including any local changes on disk, against
this version.  When both arguments are specified, the changes between these two
versions will be displayed.  If supplied,
.Nm
will filter diffs between commits by
.Ar path
so that only changes involving the file(s) identified are displayed.  Paths may
be absolute, relative to the current working directory, or relative to the
repository root.  Both
.Ar artifact1
and
.Ar artifact2
must be of the same type, which is expected to be either a symbolic check-in
name, tag, (unique abbreviated prefix of) a commit or blob artifact UUID SHA1
or SHA3 hash, or an ISO 8601 formatted date. Both artifact arguments must be
supplied when diffing blobs; any following non-option arguments are invalid
and will be ignored.
.Pp
Options for
.Cm fnc diff
are as follows:
.Bl -tag -width Ds
.It Fl C , -no-colour
Disable coloured diff output, which is enabled by default on supported
terminals. If this option is not used, colour can be toggled with the
.Sy c
diff view key binding as documented below.
.It Fl h , -help
Display diff command help and usage information then exit.
.It Fl i , -invert
Invert the difference between artifacts when displaying the diff.
.It Fl w , -whitespace
Ignore whitespace-only changes when displaying the diff.
.It Fl x , -context Ar n
Set
.Ar n
context lines to be shown in the diff.  By default, 5 context lines are
shown. Negative values are a no-op.
.El
.Pp
Key bindings for
.Cm fnc diff
are as follows:
.Bl -tag -width Ds
.It Cm c
Toggle coloured diff output. On supported terminals,
.Nm
will default to displaying changes and diff metadata in colour.
.It Cm i
Toggle inversion of diff output.
.It Cm v
Toggle verbosity of diff output. By default,
.Nm
will display the entire content of newly added or deleted files.
.It Cm w
Toggle whether whitespace-only changes are ignored when comparing lines in the
diff.
.It Cm Arrow-down, j
Scroll down one line of diff output.
.It Cm Arrow-up, k
Scroll up one line of diff output.
.It Cm Ctrl+f, Page-down, Space
Scroll down one page of diff output.
.It Cm Ctrl+b, Page-up
Scroll up one page of diff output.
.It Cm G, End
Scroll to the end of the view (i.e., last line of diff output).
.It Cm gg, Home
Scroll to the top of the view (i.e., first line of diff output).
.It Cm \&-, \&_
Decrease the number of context lines shown in diff output.
.It Cm \&=, \&+
Increase the number of context lines shown in diff output.
.It Cm Ctrl+k, K, <, \&,
Move up the
.Cm timeline
to the previous (i.e., more recent) commit and display its diff.
.It Cm Ctrl+j, J, >, \&.
Move down the
.Cm timeline
to the next (i.e., earlier) commit and display its diff.
.It Cm /
Prompt to enter a search term to begin searching the diff output for
lines matching the pattern provided.  The search term is an extended
regular expression, which is documented in
.Xr re_format 7 .
.It Cm n
Find the next line that matches the current search term.
.It Cm N
Find the previous line that matches the current search term.
.El
.Tg dir
.It Cm tree Oo Fl C | -no-colour Oc Oo Fl c | -commit Ar commit Oc \
Oo Fl h | -help Oc Op Ar path
.Dl (aliases: Cm dir , Cm tr )
Display navigable, hierarchical tree of a repository.  If a
.Ar path
is specified, display tree nodes of this path.  The
.Ar path
may be absolute, relative to the current working directory, or relative to the
repository root.  With no options passed, the tree will reflect the state of the
latest commit on trunk.  This command must be executed from within or below the
top level directory of the repository; that is,
.Nm
assumes a local checkout is open in or above the current working directory.
.Pp
Tree nodes are lexicographically ordered and may be postfixed with an identifier
corresponding to the mode of the file object on disk as returned by
.Xr lstat 2 :
.Bl -column YXZ description
.It / Ta directory
.It * Ta executable
.It @ Ta symbolic link
.El
.Pp
Nodes representing symbolic links are also annotated with the path of the
source file.
.Pp
Options for
.Cm fnc tree
are as follows:
.Bl -tag -width Ds
.It Fl C , -no-colour
Disable coloured output, which is enabled by default on supported terminals.
If this option is not used, colour can be toggled with the
.Sy c
tree view key binding as documented below.
.It Fl c , -commit Ar commit
The displayed tree will reflect the state of the repository as at the check-in
identified by
.Ar commit .
The expected argument is either the name of a branch, which will resolve
to the latest commit on the given branch, or (a unique abbreviated
prefix of) a valid commit UUID SHA1 or SHA3 hash.  For a complete list of valid
arguments this option accepts, see
.Lk https://fossil-scm.org/home/doc/trunk/www/checkin_names.wiki \
"Fossil's Check-in Names".
.It Fl h , -help
Display tree command help and usage information then exit.
.El
.Pp
Key bindings for
.Cm fnc tree
are as follows:
.Bl -tag -width Ds
.It Cm Enter, Arrow-right, l
Enter the currently selected directory, or open a
.Cm blame
view of the currently selected file.
.It Cm Backspace, Arrow-left, h
Move up a level to the parent directory.  This is a no-op when in the root tree.
.It Cm Arrow-down, j
Move selection cursor one node down the tree.
.It Cm Arrow-up, k
Move selection cursor one node up the tree.
.It Cm Page-down, Ctrl+f
Move selection cursor one page down the tree.
.It Cm Page-up, Ctrl+b
Move selection cursor one page up the tree.
.It Cm Home, gg
Move selection cursor to the first node in the tree.
.It Cm End, G
Move selection cursor to the last node in the tree.
.It Cm c
Toggle coloured output. On supported terminals,
.Nm
will default to displaying the tree in colour.
.It Cm t
Open
.Cm timeline
view for the currently selected tree node.  This will display the timeline of
all commits that involve the versioned file(s) corresponding to the selected
node.
.It Cm i
Show SHA hash UUID for all file nodes displayed in the tree.
.It Cm /
Prompt to enter a search term to begin searching the tree for nodes matching the
entered pattern.  The search term is an extended regular expression, as
documented in
.Xr re_format 7 ,
and is matched against the path of each tree node.
.It Cm n
Find the next tree node that matches the current search pattern.
.It Cm N
Find the previous tree node that matches the current search pattern.
.El
.Tg praise
.It Cm blame Oo Fl C | -no-colour Oc \
Oo Fl c | -commit Ar commit Oo Fl r | -reverse Oc Oc Oo Fl h | -help Oc \
Oo Fl n | -limit Ar n Oc Ar path
.Dl (aliases: Cm praise , Cm annotate , Cm bl , Cm pr , Cm an )
Show commit attribution history for each line of the file at the specified
.Ar path ,
which may be absolute, relative to the current working directory, or relative to
the repository root.  This command must be executed from within or below the top
level directory of the repository; that is,
.Nm
assumes a local checkout is open in or above the current working directory.
.Pp
Options for
.Cm fnc blame
are as follows:
.Bl -tag -width Ds
.It Fl C , -no-colour
Disable coloured output, which is enabled by default on supported terminals.
If this option is not used, colour can be toggled with the
.Sy c
blame view key binding as documented below.
.It Fl c , -commit Ar commit
Start blame of file at the specified
.Ar path
from the check-in identified by
.Ar commit .
The expected argument is either the name of a branch, which will resolve
to the latest commit on the given branch, or (a unique abbreviated
prefix of) a valid commit UUID SHA1 or SHA3 hash. When this option is
not supplied,
.Nm
will blame the version of the file from the current checkout.  For a complete
list of valid arguments this option accepts, see
.Lk https://fossil-scm.org/home/doc/trunk/www/checkin_names.wiki \
"Fossil's Check-in Names".
.It Fl h , -help
Display blame command help and usage information then exit.
.It Fl n , -limit Ar n
Limit depth of blame history to
.Ar n
commits or seconds.  The latter is denoted by a postfixed 's' (e.g., 30s).
With this option,
.Nm
will traverse either as many commits as specified, or as possible in the
specified time limit.  By default,
.Nm
will traverse the entire historical record of the file, which can be expensive
for large files that span many commits. Use this option for a faster, more
targeted annotation.
.It Fl r , -reverse
Reverse annotate the file starting from a historical commit and move forward in
time. That is, rather than show the most recent change to each line, show the
first time each line was modified by a subsequent commit after the specified
.Ar commit .
(Requires \fB\-c\fP|\fB\-\-commit\fP.)
.El
.Pp
Key bindings for
.Cm fnc blame
are as follows:
.Bl -tag -width Ds
.It Cm Arrow-down, j
Move selection cursor down one line.
.It Cm Arrow-up, k
Move selection cursor up one line.
.It Cm Page-down, Ctrl+f
Move selection cursor down one page.
.It Cm Page-up, Ctrl+b
Move selection cursor up one page.
.It Cm Home, gg
Move selection cursor to the first line in the file.
.It Cm End, G
Move selection cursor to the last line in the file.
.It Cm Enter
Display the
.Cm diff
of the commit corresponding to the currently selected line.
.It Cm b
Blame the version of the file corresponding to the commit in the currently
selected line.
.It Cm p
Blame the version of the file corresponding to the parent of the commit in
the currently selected line.
.It Cm B, Backspace
Reload the previous blamed version of the file.
.It Cm c
Toggle coloured output. On supported terminals,
.Nm
will default to displaying the blamed file in colour.
.It Cm /
Prompt to enter a search term to begin searching the file for tokens matching
the entered pattern.  The search term is an extended regular expression, as
documented in
.Xr re_format 7 .
.It Cm n
Find the next token that matches the current search pattern.
.It Cm N
Find the previous token that matches the current search pattern.
.El
.Tg tag
.It Cm branch Oo Fl C | -no-colour Oc Oo Fl -after Ar date | \
Fl -before Ar date Oc Oo Fl h | -help Oc Oo Fl -open | Fl -closed Oc \
Oo Fl p | -no-private Oc Oo Fl r | -reverse Oc \
Oo Fl s | -sort Ar order Oc Op Ar glob
.Dl (aliases: Cm tag , Cm br )
Display navigable list of repository branches. If
.Ar glob ,
is specified, only display branches matching the pattern provided. Pattern
matching comparisons depend on the
.Xr sqlite3 1
.B
LIKE
operator, which only folds case for the ASCII character set.  This
command must be executed from within or below the top level directory of the
repository; that is,
.Nm
assumes a local checkout is open in or above the current working directory.
.Pp
Branches are lexicographically ordered by default, and are prefixed with an
identifier corresponding to the branch state (i.e., open/closed). The
current and private branches are additionally annotated with a postfixed
identifier:
.Bl -column ABCDEFGHIJ description
.It +dev-foo Ta open
.It -rm-bar Ta closed
.It +trunk@ Ta current
.It +wip-baz* Ta private
.El
.Pp
All branches, irrespective of state or privacy, are displayed by default, but
can be filtered based on several characteristics.
.Pp
Options for
.Cm fnc branch
are as follows:
.Bl -tag -width Ds
.It Fl C , -no-colour
Disable coloured output, which is enabled by default on supported terminals.
If this option is not used, colour can be toggled with the
.Sy c
branch view key binding as documented below.
.It Fl a , -after Ar date
Display only those branches with activity after the specified
.Ar date .
.It Fl b , -before Ar date
Display only those branches with activity before the specified
.Ar date .
.It Fl c , -close
Display only closed branches.
.It Fl h , -help
Display branch command help and usage information then exit.
.It Fl o , -open
Display only opened branches.
.It Fl p , -no-private
Do not show private branches, which are included in the list of displayed
branches by default.
.It Fl r , -reverse
Reverse the order in which branches are displayed.
.It Fl s , -sort Ar order
Sort branches by
.Ar order .
Valid
.Ar order
values are as follows:
.Bl -column YXZ description
.Sy mru Ta most recently used
.Sy state Ta open/closed state
.El
.Pp
Branches are sorted in lexicographical order by default.
.El
.Pp
Key bindings for
.Cm fnc branch
are as follows:
.Bl -tag -width Ds
.It Cm Arrow-down, j
Move selection cursor down one branch.
.It Cm Arrow-up, k
Move selection cursor up one branch.
.It Cm Page-down, Ctrl+f
Move selection cursor down one page.
.It Cm Page-up, Ctrl+b
Move selection cursor up one page.
.It Cm Home, gg
Move selection cursor to the first branch in the list.
.It Cm End, G
Move selection cursor to the last branch in the list.
.It Cm Enter, Space
Display the
.Cm timeline
of the currently selected branch.
.It Cm c
Toggle coloured output.  On supported terminals,
.Nm
will default to displaying the branch list in colour.
.It Cm d
Toggle display of the date on which the branch last received changes.
.It Cm i
Toggle display of the SHA{1,3} hash that identifies branch, which is the hash
of the commit on the tip of said branch.
.It Cm t
Open the
.Cm tree
view of the currently selected branch.
.It Cm R, Ctrl+l
Reload the view with all repository branches, irrespective of which options
were used in this
.Cm fnc branch
invocation.
.It Cm /
Prompt to enter a search term to begin searching the list for branches matching
the entered pattern.  The search term is an extended regular expression, as
documented in
.Xr re_format 7 .
.It Cm n
Find the next branch that matches the current search pattern.
.It Cm N
Find the previous branch that matches the current search pattern.
.El
.El
.Sh EXIT STATUS
.Ex -std fnc
.Sh SEE ALSO
.Xr fossil 1 ,
.Xr re_format 7
.Xr sqlite3 1
.Sh AUTHOR
.An Mark Jamsek Aq Mt mark@jamsek.com

Deleted fnc/fnc.c.

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/*
 * Copyright (c) 2021 Mark Jamsek <mark@jamsek.com>
 * Copyright (c) 2013-2021 Stephan Beal <https://wanderinghorse.net>
 * Copyright (c) 2020 Stefan Sperling <stsp@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * This _POSIX_C_SOURCE bit really belongs in a config.h, but in the
 * name of expedience...
 */
#if defined __linux__
#  if !defined(_XOPEN_SOURCE)
#    define _XOPEN_SOURCE 700
/*
 * _POSIX_C_SOURCE >= 199309L needed for sigaction(), sigemptyset() on Linux,
 * but glibc docs claim that _XOPEN_SOURCE>=700 has the same effect, PLUS
 * we need _XOPEN_SOURCE>=500 for ncurses wide-char APIs on linux.
 */
#  endif
#  if !defined(_DEFAULT_SOURCE)
#    define _DEFAULT_SOURCE
/* Needed for strsep() on glibc >= 2.19. */
#  endif
#endif


#include <sys/queue.h>
#include <sys/ioctl.h>
#include <sys/stat.h>

#ifdef _WIN32
#include <windows.h>
#define ssleep(x) Sleep(x)
#else
#define ssleep(x) usleep((x) * 1000)
#endif
#include <ctype.h>
#include <curses.h>
#include <panel.h>
#include <locale.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <err.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <pthread.h>
#include <libgen.h>
#include <regex.h>
#include <signal.h>
#include <wchar.h>
#include <langinfo.h>

#include "libfossil.h"

#define FNC_VERSION	0.4

/* Utility macros. */
#define MIN(a, b)	(((a) < (b)) ? (a) : (b))
#define MAX(a, b)	(((a) > (b)) ? (a) : (b))
#if !defined(CTRL)
#define CTRL(key)	((key) & 037)	/* CTRL+<key> input. */
#endif
#define nitems(a)	(sizeof((a)) / sizeof((a)[0]))
#define STRINGIFYOUT(s)	#s
#define STRINGIFY(s)	STRINGIFYOUT(s)
#define CONCATOUT(a, b)	a ## b
#define CONCAT(a, b)	CONCATOUT(a, b)
#define FILE_POSITION	__FILE__ ":" STRINGIFY(__LINE__)
#define FLAG_SET(f, b)	((f) |= (b))
#define FLAG_CHK(f, b)	((f) & (b))
#define FLAG_TOG(f, b)	((f) ^= (b))
#define FLAG_CLR(f, b)	((f) &= ~(b))

/* Application macros. */
#define PRINT_VERSION	STRINGIFY(FNC_VERSION)
#define DIFF_DEF_CTXT	5		/* Default diff context lines. */
#define DIFF_MAX_CTXT	64		/* Max diff context lines. */
#define SPIN_INTERVAL	200		/* Status line progress indicator. */
#define SPINNER		"\\|/-\0"
#define NULL_DEVICE	"/dev/null"
#define NULL_DEVICELEN	(sizeof(NULL_DEVICE) - 1)
#define KEY_ESCAPE	27
#if DEBUG
#define RC(r, fmt, ...)	fcli_err_set(r, "%s::%s " fmt,			\
			    __func__, FILE_POSITION, __VA_ARGS__)
#else
#define RC(r, fmt, ...) fcli_err_set(r, fmt, __VA_ARGS__)
#endif /* DEBUG */

/* Portability macros. */
#ifndef __OpenBSD__
#ifndef HAVE_STRTONUM
#  define strtonum(s, min, max, o) strtol(s, (char **)o, 10)
# endif /* HAVE_STRTONUM */
#endif

#if !defined(__dead)
#define __dead
#endif

#ifndef TAILQ_FOREACH_SAFE
/* Rewrite of OpenBSD 6.9 sys/queue.h for Linux builds. */
#define TAILQ_FOREACH_SAFE(var, head, field, tmp)			\
	for ((var) = ((head)->tqh_first);				\
		(var) != (NULL) && ((tmp) = TAILQ_NEXT(var, field), 1);	\
		(var) = (tmp))
#endif

/*
 * STAILQ was added to OpenBSD 6.9; fallback to SIMPLEQ for prior versions.
 * XXX This is an ugly hack; replace with a better solution.
 */
#ifdef __OpenBSD__
# ifndef STAILQ_HEAD
#  define STAILQ SIMPLEQ
# endif /* STAILQ_HEAD */
#endif /* OpenBSD */

#if defined __linux__
# ifndef strlcat
#  define strlcat(_d, _s, _sz) fnc_strlcat(_d, _s, _sz)
# endif /* strlcat */
# ifndef strlcpy
#  define strlcpy(_d, _s, _sz) fnc_strlcpy(_d, _s, _sz)
# endif /* strlcpy */
#endif /* __linux__ */

__dead static void	usage(void);
static void		usage_timeline(void);
static void		usage_diff(void);
static void		usage_tree(void);
static void		usage_blame(void);
static void		usage_branch(void);
static int		fcli_flag_type_arg_cb(fcli_cliflag const *);
static int		cmd_timeline(fcli_command const *);
static int		cmd_diff(fcli_command const *);
static int		cmd_tree(fcli_command const *);
static int		cmd_blame(fcli_command const *);
static int		cmd_branch(fcli_command const *);

/*
 * Singleton initialising global configuration and state for app startup.
 */
static struct fnc_setup {
	/* Global options. */
	const char	*cmdarg;	/* Retain argv[1] for use/err report. */
	const char	*sym;		/* Open view from this symbolic name. */
	const char	*path;		/* Optional path for timeline & tree. */
	int		 err;		/* Indicate fnc error state. */
	bool		 hflag;		/* Flag if --help is requested. */
	bool		 vflag;		/* Flag if --version is requested. */
	bool		 reverse;	/* Reverse branch sort or blame. */

	/* Timeline options. */
	struct artifact_types {
		const char	**values;
		short		  nitems;
	} *filter_types;		/* Only load commits of <type>. */
	union {
		const char	 *zlimit;
		int		  limit;
	} nrecords;			/* Number of commits to load. */
	const char	*filter_tag;	/* Only load commits with <tag>. */
	const char	*filter_branch;	/* Only load commits from <branch>. */
	const char	*filter_user;	/* Only load commits from <user>. */
	const char	*filter_type;	/* Placeholder for repeatable types. */
	bool		 utc;		/* Display UTC sans user local time. */

	/* Diff options. */
	const char	*context;	/* Number of context lines. */
	bool		 ws;		/* Ignore whitespace-only changes. */
	bool		 nocolour;	/* Disable colour in diff output. */
	bool		 quiet;		/* Disable verbose diff output. */
	bool		 invert;	/* Toggle inverted diff output. */

	/* Branch options. */
	const char	*before;	/* Last branch change before date. */
	const char	*after;		/* Last branch change after date. */
	const char	*sort;		/* Lexicographical, MRU, open/closed. */
	bool		 closed;	/* Show only closed branches. */
	bool		 open;		/* Show only open branches */
	bool		 noprivate;	/* Don't show private branches. */

	/* Command line flags and help. */
	fcli_help_info	  fnc_help;			/* Global help. */
	fcli_cliflag	  cliflags_global[3];		/* Global options. */
	fcli_command	  cmd_args[6];			/* App commands. */
	fcli_cliflag	  cliflags_timeline[11];	/* Timeline options. */
	fcli_cliflag	  cliflags_diff[7];		/* Diff options. */
	fcli_cliflag	  cliflags_tree[4];		/* Tree options. */
	fcli_cliflag	  cliflags_blame[6];		/* Blame options. */
	fcli_cliflag	  cliflags_branch[10];		/* Branch options. */
} fnc_init = {
	NULL,		/* cmdarg copy of argv[1] to aid usage/error report. */
	NULL,		/* sym(bolic name) of commit to open defaults to tip. */
	NULL,		/* path for tree to open or timeline to find commits. */
	0,		/* err fnc error state. */
	false,		/* hflag if --help is requested. */
	false,		/* vflag if --version is requested. */
	false,		/* reverse branch sort/annotation defaults to off. */
	NULL,		/* filter_types defaults to indiscriminate. */
	{0},		/* nrecords defaults to all commits. */
	NULL,		/* filter_tag defaults to indiscriminate. */
	NULL,		/* filter_branch defaults to indiscriminate. */
	NULL,		/* filter_user defaults to indiscriminate. */
	NULL,		/* filter_type temporary placeholder. */
	false,		/* utc defaults to off (i.e., show user local time). */
	NULL,		/* context defaults to five context lines. */
	false,		/* ws defaults to acknowledge whitespace. */
	false,		/* nocolour defaults to off (i.e., use diff colours). */
	false,		/* quiet defaults to off (i.e., verbose diff is on). */
	false,		/* invert diff defaults to off. */
	NULL,		/* before defaults to any time. */
	NULL,		/* after defaults to any time. */
	NULL,		/* sort by MRU or open/closed (dflt: lexicographical) */
	false,		/* closed only branches is off (defaults to all). */
	false,		/* open only branches is off by (defaults to all). */
	false,		/* noprivate is off (default to show private branch). */

	{ /* fnc_help global app help details. */
	    "A read-only ncurses browser for Fossil repositories in the "
	    "terminal.", NULL, usage
	},

	{ /* cliflags_global global app options. */
	    FCLI_FLAG_BOOL("h", "help", &fnc_init.hflag,
	    "Display program help and usage then exit."),
	    FCLI_FLAG_BOOL("v", "version", &fnc_init.vflag,
	    "Display program version number and exit."),
	    fcli_cliflag_empty_m
	},

	{ /* cmd_args available app commands. */
	    {"timeline", "tl\0time\0ti\0log\0",
	    "Show chronologically descending commit history of the repository.",
	    cmd_timeline, usage_timeline, fnc_init.cliflags_timeline},
	    {"diff", "di\0",
	    "Show changes to versioned files introduced with a given commit.",
	    cmd_diff, usage_diff, fnc_init.cliflags_diff},
	    {"tree", "tr\0dir\0",
	    "Show repository tree corresponding to a given commit",
	    cmd_tree, usage_tree, fnc_init.cliflags_tree},
	    {"blame", "bl\0praise\0pr\0annotate\0an\0",
	    "Show commit attribution history for each line of a file.",
	    cmd_blame, usage_blame, fnc_init.cliflags_blame},
	    {"branch", "br\0tag\0",
	    "Show navigable list of repository branches.",
	    cmd_branch, usage_branch, fnc_init.cliflags_branch},
	    {NULL, NULL, NULL, NULL, NULL}	/* Sentinel. */
	},

	{ /* cliflags_timeline timeline command related options. */
	    FCLI_FLAG_BOOL("C", "no-colour", &fnc_init.nocolour,
            "Disable colourised timeline, which is enabled by default on\n    "
            "supported terminals. Colour can also be toggled with the 'c' "
            "\n    key binding in timeline view when this option is not used."),
	    FCLI_FLAG("T", "tag", "<tag>", &fnc_init.filter_tag,
            "Only display commits with T cards containing <tag>."),
	    FCLI_FLAG("b", "branch", "<branch>", &fnc_init.filter_branch,
            "Only display commits that reside on the given <branch>."),
	    FCLI_FLAG("c", "commit", "<commit>", &fnc_init.sym,
            "Open the timeline from <commit>. Common symbols are:\n"
            "\tSHA{1,3} hash\n"
            "\tSHA{1,3} unique prefix\n"
            "\tbranch\n"
            "\ttag:TAG\n"
            "\troot:BRANCH\n"
            "\tISO8601 date\n"
            "\tISO8601 timestamp\n"
            "\t{tip,current,prev,next}\n    "
            "For a complete list of symbols see Fossil's Check-in Names:\n    "
            "https://fossil-scm.org/home/doc/trunk/www/checkin_names.wiki"),
	    FCLI_FLAG_BOOL("h", "help", NULL,
            "Display timeline command help and usage."),
	    FCLI_FLAG("n", "limit", "<n>", &fnc_init.nrecords.zlimit,
            "Limit display to <n> latest commits; defaults to entire history "
            "of\n    current checkout. Negative values are a no-op."),
	    FCLI_FLAG_X("t", "type", "<type>", &fnc_init.filter_type,
	    fcli_flag_type_arg_cb,
            "Only display <type> commits. Valid types are:\n"
            "\tci - check-in\n"
            "\tw  - wiki\n"
            "\tt  - ticket\n"
            "\te  - technote\n"
            "\tf  - forum post\n"
            "    n.b. This is a repeatable flag (e.g., -t ci -t w)."),
	    FCLI_FLAG("u", "username", "<user>", &fnc_init.filter_user,
            "Only display commits authored by <username>."),
	    FCLI_FLAG_BOOL("z", "utc", &fnc_init.utc,
            "Use UTC (instead of local) time."),
	    fcli_cliflag_empty_m
	}, /* End cliflags_timeline. */

	{ /* cliflags_diff diff command related options. */
	    FCLI_FLAG_BOOL("C", "no-colour", &fnc_init.nocolour,
            "Disable coloured diff output, which is enabled by default on\n    "
            "supported terminals. Colour can also be toggled with the 'c' "
            "\n    key binding in diff view when this option is not used."),
	    FCLI_FLAG_BOOL("h", "help", NULL,
            "Display diff command help and usage."),
	    FCLI_FLAG_BOOL("i", "invert", &fnc_init.invert,
            "Invert difference between artifacts. Inversion can also be "
            "toggled\n    with the 'i' key binding in diff view."),
	    FCLI_FLAG_BOOL("q", "quiet", &fnc_init.quiet,
            "Disable verbose diff output; that is, do not output complete"
            " content\n    of newly added or deleted files. Verbosity can also"
            " be toggled with\n    the 'v' key binding in diff view."),
	    FCLI_FLAG_BOOL("w", "whitespace", &fnc_init.ws,
            "Ignore whitespace-only changes when displaying diff. This option "
            "can\n    also be toggled with the 'w' key binding in diff view."),
	    FCLI_FLAG("x", "context", "<n>", &fnc_init.context,
            "Show <n> context lines when displaying diff; <n> is capped at 64."
            "\n    Negative values are a no-op."),
	    fcli_cliflag_empty_m
	}, /* End cliflags_diff. */

	{ /* cliflags_tree tree command related options. */
	    FCLI_FLAG_BOOL("C", "no-colour", &fnc_init.nocolour,
            "Disable coloured output, which is enabled by default on supported"
            "\n    terminals. Colour can also be toggled with the 'c' key "
            "binding when\n    this option is not used."),
	    FCLI_FLAG("c", "commit", "<commit>", &fnc_init.sym,
            "Display tree that reflects repository state as at <commit>.\n"
            "    Common symbols are:"
            "\n\tSHA{1,3} hash\n"
            "\tSHA{1,3} unique prefix\n"
            "\tbranch\n"
            "\ttag:TAG\n"
            "\troot:BRANCH\n"
            "\tISO8601 date\n"
            "\tISO8601 timestamp\n"
            "\t{tip,current,prev,next}\n    "
            "For a complete list of symbols see Fossil's Check-in Names:\n    "
            "https://fossil-scm.org/home/doc/trunk/www/checkin_names.wiki"),
	    FCLI_FLAG_BOOL("h", "help", NULL,
            "Display tree command help and usage."),
	    fcli_cliflag_empty_m
	}, /* End cliflags_tree. */

	{ /* cliflags_blame blame command related options. */
	    FCLI_FLAG_BOOL("C", "no-colour", &fnc_init.nocolour,
            "Disable coloured output, which is enabled by default on supported"
            "\n    terminals. Colour can also be toggled with the 'c' key "
            "binding when\n    this option is not used."),
	    FCLI_FLAG("c", "commit", "<commit>", &fnc_init.sym,
            "Start blame of specified file from <commit>. Common symbols are:\n"
            "\tSHA{1,3} hash\n"
            "\tSHA{1,3} unique prefix\n"
            "\tbranch\n"
            "\ttag:TAG\n"
            "\troot:BRANCH\n"
            "\tISO8601 date\n"
            "\tISO8601 timestamp\n"
            "\t{tip,current,prev,next}\n    "
            "For a complete list of symbols see Fossil's Check-in Names:\n    "
            "https://fossil-scm.org/home/doc/trunk/www/checkin_names.wiki"),
	    FCLI_FLAG_BOOL("h", "help", NULL,
            "Display blame command help and usage."),
            FCLI_FLAG("n", "limit", "<n>", &fnc_init.nrecords.zlimit,
	    "Limit depth of blame history to <n> commits or seconds. Denote the"
	    "\n    latter by postfixing 's' (e.g., 30s). Useful for large files"
	    " with\n    extensive history. Persists for the duration of the "
	    "session."),
            FCLI_FLAG_BOOL("r", "reverse", &fnc_init.reverse,
	    "Reverse annotate the file starting from a historical commit. "
	    "Rather\n    than show the most recent change of each line, show "
	    "the first time\n    each line was modified after the specified "
	    "commit. Requires -c|--commit."),
	    fcli_cliflag_empty_m
	}, /* End cliflags_blame. */

	{ /* cliflags_branch branch command related options. */
	    FCLI_FLAG_BOOL("C", "no-colour", &fnc_init.nocolour,
            "Disable coloured output, which is enabled by default on supported"
            "\n    terminals. Colour can also be toggled with the 'c' key "
            "binding when\n    this option is not used."),
	    FCLI_FLAG("a", "after", "<date>", &fnc_init.after,
            "Show branches with last activity occuring after <date>, which is\n"
            "    expected to be either an ISO8601 (e.g., 2020-10-10) or "
            "unambiguous\n    DD/MM/YYYY or MM/DD/YYYY formatted date."),
	    FCLI_FLAG("b", "before", "<date>", &fnc_init.before,
            "Show branches with last activity occuring before <date>, which is"
            "\n    expected to be either an ISO8601 (e.g., 2020-10-10) or "
            "unambiguous\n    DD/MM/YYYY or MM/DD/YYYY formatted date."),
            FCLI_FLAG_BOOL("c", "closed", &fnc_init.closed,
	    "Show closed branches only. Open and closed branches are listed by "
	    "\n    default."),
	    FCLI_FLAG_BOOL("h", "help", NULL,
            "Display branch command help and usage."),
            FCLI_FLAG_BOOL("o", "open", &fnc_init.open,
	    "Show open branches only. Open and closed branches are listed by "
	    "\n    default."),
            FCLI_FLAG_BOOL("p", "no-private", &fnc_init.noprivate,
	    "Do not show private branches, which are otherwise included in the"
	    "\n    list of displayed branches by default."),
            FCLI_FLAG_BOOL("r", "reverse", &fnc_init.reverse,
	    "Reverse the order in which branches are displayed."),
	    FCLI_FLAG("s", "sort", "<order>", &fnc_init.sort,
            "Sort branches by <order>. Available options are:\n"
            "\tmru   - most recently used\n"
            "\tstate - open/closed state\n    "
            "Branches are sorted in lexicographical order by default."),
	    fcli_cliflag_empty_m
	}, /* End cliflags_blame. */
};

enum fsl_list_object {
	FNC_ARTIFACT_OBJ,
	FNC_COLOUR_OBJ
};

enum date_string {
	ISO8601_DATE_ONLY = 10,
	ISO8601_TIMESTAMP = 20
};

enum fnc_view_id {
	FNC_VIEW_TIMELINE,
	FNC_VIEW_DIFF,
	FNC_VIEW_TREE,
	FNC_VIEW_BLAME,
	FNC_VIEW_BRANCH
};

enum fnc_search_mvmnt {
	SEARCH_DONE,
	SEARCH_FORWARD,
	SEARCH_REVERSE
};

enum fnc_search_state {
	SEARCH_WAITING,
	SEARCH_CONTINUE,
	SEARCH_COMPLETE,
	SEARCH_NO_MATCH,
	SEARCH_FOR_END
};

enum fnc_colours {
	FNC_DIFF_META = 1,
	FNC_DIFF_MINUS,
	FNC_DIFF_PLUS,
	FNC_DIFF_CHNK,
	FNC_TREE_LINK,
	FNC_TREE_DIR,
	FNC_TREE_EXEC,
	FNC_COMMIT_ID,
	FNC_USER_STR,
	FNC_DATE_STR,
	FNC_TAGS_STR
};

enum fnc_diff_type {
	FNC_DIFF_CKOUT,
	FNC_DIFF_COMMIT,
	FNC_DIFF_BLOB,
	FNC_DIFF_WIKI
};

struct fnc_colour {
	regex_t	regex;
	uint8_t	scheme;
};

struct fsl_list_state {
	enum fsl_list_object	obj;
};

struct fnc_commit_artifact {
	fsl_buffer		 wiki;
	fsl_buffer		 pwiki;
	fsl_list		 changeset;
	fsl_uuid_str		 uuid;
	fsl_uuid_str		 puuid;
	fsl_id_t		 rid;
	fsl_id_t		 prid;
	char			*user;
	char			*timestamp;
	char			*comment;
	char			*branch;
	char			*type;
	enum fnc_diff_type	 diff_type;
};

struct fsl_file_artifact {
	fsl_card_F		*fc;
	enum fsl_ckout_change_e	 change;
};

TAILQ_HEAD(commit_tailhead, commit_entry);
struct commit_entry {
	TAILQ_ENTRY(commit_entry)	 entries;
	struct fnc_commit_artifact	*commit;
	int				 idx;
};

struct commit_queue {
	struct commit_tailhead	head;
	int			ncommits;
};

/*
 * The following two structs are used to construct the tree of the entire
 * repository; that is, from the root through to all subdirectories and files.
 */
struct fnc_repository_tree {
	struct fnc_repo_tree_node	*head;     /* Head of repository tree */
	struct fnc_repo_tree_node	*tail;     /* Final node in the tree. */
	struct fnc_repo_tree_node	*rootail;  /* Final root level node. */
};

struct fnc_repo_tree_node {
	struct fnc_repo_tree_node	*next;	     /* Next node in tree. */
	struct fnc_repo_tree_node	*prev;	     /* Prev node in tree. */
	struct fnc_repo_tree_node	*parent_dir; /* Dir containing node. */
	struct fnc_repo_tree_node	*sibling;    /* Next node in same dir */
	struct fnc_repo_tree_node	*children;   /* List of node children */
	struct fnc_repo_tree_node	*lastchild;  /* Last child in list. */
	char				*basename;   /* Final path component. */
	char				*path;	     /* Full pathname of node */
	fsl_uuid_str			 uuid;	     /* File artifact hash. */
	mode_t				 mode;	     /* File mode. */
	double				 mtime;	     /* Mod time of file. */
	uint_fast16_t			 pathlen;    /* Length of path. */
	uint_fast16_t			 nparents;   /* Path components sans- */
						     /* -basename. */
};

/*
 * The following two structs represent a given subtree within the repository;
 * for example, the top level tree and all its elements, or the elements of
 * the src/ directory (but not any members of src/ subdirectories).
 */
struct fnc_tree_object {
	struct fnc_tree_entry	*entries;  /* Array of tree entries. */
	int			 nentries; /* Number of tree entries. */
};

struct fnc_tree_entry {
	char			*basename; /* Final component of path. */
	char			*path;	   /* Full pathname of tree entry. */
	fsl_uuid_str		 uuid;	   /* File artifact hash. */
	mode_t			 mode;	   /* File mode. */
	double			 mtime;	   /* Modification time of file. */
	int			 idx;	   /* Index of this tree entry. */
};

/*
 * Each fnc_tree_object that is _not_ the repository root will have a (list of)
 * fnc_parent_tree(s) to be tracked.
 */
struct fnc_parent_tree {
	TAILQ_ENTRY(fnc_parent_tree)	 entry;
	struct fnc_tree_object		*tree;
	struct fnc_tree_entry		*first_entry_onscreen;
	struct fnc_tree_entry		*selected_entry;
	int				 selected_idx;
};

pthread_mutex_t fnc_mutex = PTHREAD_MUTEX_INITIALIZER;

struct fnc_tl_thread_cx {
	struct commit_queue	 *commits;
	struct commit_entry	**first_commit_onscreen;
	struct commit_entry	**selected_commit;
	fsl_db			 *db;
	fsl_stmt		 *q;
	regex_t			 *regex;
	char			 *path;	     /* Match commits involving path. */
	enum fnc_search_state	 *search_status;
	enum fnc_search_mvmnt	 *searching;
	int			  spin_idx;
	int			  ncommits_needed;
	/*
	 * XXX Is there a more elegant solution to retrieving return codes from
	 * thread functions while pinging between, but before we join, threads?
	 */
	int			  rc;
	bool			  tree_open;
	bool			  endjmp;
	bool			  timeline_end;
	sig_atomic_t		 *quit;
	pthread_cond_t		  commit_consumer;
	pthread_cond_t		  commit_producer;
};

struct fnc_tl_view_state {
	struct fnc_tl_thread_cx	 thread_cx;
	struct commit_queue	 commits;
	struct commit_entry	*first_commit_onscreen;
	struct commit_entry	*last_commit_onscreen;
	struct commit_entry	*selected_commit;
	struct commit_entry	*matched_commit;
	struct commit_entry	*search_commit;
	fsl_list		 colours;
	const char		*curr_ckout_uuid;
	char			*path;	     /* Match commits involving path. */
	int			 selected_idx;
	sig_atomic_t		 quit;
	pthread_t		 thread_id;
	bool			 colour;
};

struct fnc_pathlist_entry {
	TAILQ_ENTRY(fnc_pathlist_entry) entry;
	const char	*path;
	size_t		 pathlen;
	void		*data;  /* XXX May want to save id, mode, etc. */
};
TAILQ_HEAD(fnc_pathlist_head, fnc_pathlist_entry);

struct fnc_diff_view_state {
	struct fnc_view			*timeline_view;
	struct fnc_commit_artifact	*selected_commit;
	struct fnc_pathlist_head	*paths;
	fsl_buffer			 buf;
	fsl_list			 colours;
	FILE				*f;
	fsl_uuid_str			 id1;
	fsl_uuid_str			 id2;
	int				 first_line_onscreen;
	int				 last_line_onscreen;
	int				 diff_flags;
	int				 context;
	int				 sbs;
	int				 matched_line;
	int				 current_line;
	size_t				 ncols;
	size_t				 nlines;
	off_t				*line_offsets;
	bool				 eof;
	bool				 colour;
	bool				 showmeta;
};

TAILQ_HEAD(fnc_parent_trees, fnc_parent_tree);
struct fnc_tree_view_state {			  /* Parent trees of the- */
	struct fnc_parent_trees		 parents; /* -current subtree. */
	struct fnc_repository_tree	*repo;    /* The repository tree. */
	struct fnc_tree_object		*root;    /* Top level repo tree. */
	struct fnc_tree_object		*tree;    /* Currently displayed tree */
	struct fnc_tree_entry		*first_entry_onscreen;
	struct fnc_tree_entry		*last_entry_onscreen;
	struct fnc_tree_entry		*selected_entry;
	struct fnc_tree_entry		*matched_entry;
	fsl_list			 colours;
	char				*tree_label;  /* Headline string. */
	fsl_uuid_str			 commit_id;
	fsl_id_t			 rid;
	int				 ndisplayed;
	int				 selected_idx;
	bool				 colour;
	bool				 show_id;
};

struct fnc_blame_line {
	fsl_uuid_str	id;
	bool		annotated;
};

struct fnc_blame_cb_cx {
	struct fnc_view		*view;
	struct fnc_blame_line	*lines;
	fsl_uuid_str		 commit_id;
	fsl_uuid_str		 root_commit;
	int			 nlines;
	bool			*quit;
};

typedef int (*fnc_cancel_cb)(void *);

struct fnc_blame_thread_cx {
	struct fnc_blame_cb_cx	*cb_cx;
	fsl_annotate_opt	 blame_opt;
	fnc_cancel_cb		 cancel_cb;
	const char		*path;
	void			*cancel_cx;
	bool			*complete;
};

struct fnc_blame {
	struct fnc_blame_thread_cx	 thread_cx;
	struct fnc_blame_cb_cx		 cb_cx;
	FILE				*f;	/* Non-annotated copy of file */
	struct fnc_blame_line		*lines;
	off_t				*line_offsets;
	off_t				 filesz;
	fsl_id_t			 origin; /* Tip rid for reverse blame */
	int				 nlines;
	int				 nlimit;    /* Limit depth traversal. */
	pthread_t			 thread_id;
};

CONCAT(STAILQ, _HEAD)(fnc_commit_id_queue, fnc_commit_qid);
struct fnc_commit_qid {
	CONCAT(STAILQ, _ENTRY)(fnc_commit_qid) entry;
	fsl_uuid_str	 id;
};

struct fnc_blame_view_state {
	struct fnc_blame		 blame;
	struct fnc_commit_id_queue	 blamed_commits;
	struct fnc_commit_qid		*blamed_commit;
	struct fnc_commit_artifact	*selected_commit;
	fsl_list			 colours;
	fsl_uuid_str			 commit_id;
	char				*path;
	int				 first_line_onscreen;
	int				 last_line_onscreen;
	int				 selected_line;
	int				 matched_line;
	int				 spin_idx;
	bool				 done;
	bool				 blame_complete;
	bool				 eof;
	bool				 colour;
};

struct fnc_branch {
	char		*name;
	char		*date;
	fsl_uuid_str	 id;
	bool		 private;
	bool		 current;
	bool		 open;
};

struct fnc_branchlist_entry {
	TAILQ_ENTRY(fnc_branchlist_entry) entries;
	struct fnc_branch	*branch;
	int			 idx;
};
TAILQ_HEAD(fnc_branchlist_head, fnc_branchlist_entry);

struct fnc_branch_view_state {
	struct fnc_branchlist_head	 branches;
	struct fnc_branchlist_entry	*first_branch_onscreen;
	struct fnc_branchlist_entry	*last_branch_onscreen;
	struct fnc_branchlist_entry	*matched_branch;
	struct fnc_branchlist_entry	*selected_branch;
	const char			*branch_glob;
	double				 dateline;
	int				 branch_flags;
#define BRANCH_LS_CLOSED_ONLY	0x001  /* Show closed branches only. */
#define BRANCH_LS_OPEN_ONLY	0x002  /* Show open branches only. */
#define BRANCH_LS_OPEN_CLOSED	0x003  /* Show open & closed branches (dflt). */
#define BRANCH_LS_BITMASK	0x003
#define BRANCH_LS_NO_PRIVATE	0x004  /* Show public branches only. */
#define BRANCH_SORT_MTIME	0x008  /* Sort by activity. (default: name) */
#define BRANCH_SORT_STATUS	0x010  /* Sort by open/closed. */
#define BRANCH_SORT_REVERSE	0x020  /* Reverse sort order. */
	int				 nbranches;
	int				 ndisplayed;
	int				 selected;
	int				 when;
	bool				 colour;
	bool				 show_date;
	bool				 show_id;
};

TAILQ_HEAD(view_tailhead, fnc_view);
struct fnc_view {
	TAILQ_ENTRY(fnc_view)	 entries;
	WINDOW			*window;
	PANEL			*panel;
	struct fnc_view		*parent;
	struct fnc_view		*child;
	union {
		struct fnc_diff_view_state	diff;
		struct fnc_tl_view_state	timeline;
		struct fnc_tree_view_state	tree;
		struct fnc_blame_view_state	blame;
		struct fnc_branch_view_state	branch;
	} state;
	enum fnc_view_id	 vid;
	enum fnc_search_state	 search_status;
	enum fnc_search_mvmnt	 searching;
	int			 nlines;
	int			 ncols;
	int			 start_ln;
	int			 start_col;
	int			 lines;	/* Duplicate curses LINES macro. */
	int			 cols;	/* Duplicate curses COLS macro. */
	bool			 focus_child;
	bool			 active; /* Only 1 parent or child at a time. */
	bool			 egress;
	bool			 started_search;
	regex_t			 regex;
	regmatch_t		 regmatch;

	int	(*show)(struct fnc_view *);
	int	(*input)(struct fnc_view **, struct fnc_view *, int);
	int	(*close)(struct fnc_view *);
	int	(*search_init)(struct fnc_view *);
	int	(*search_next)(struct fnc_view *);
};

static volatile sig_atomic_t rec_sigwinch;
static volatile sig_atomic_t rec_sigpipe;
static volatile sig_atomic_t rec_sigcont;

static void		 fnc_show_version(void);
static int		 init_curses(void);
static struct fnc_view	*view_open(int, int, int, int, enum fnc_view_id);
static int		 open_timeline_view(struct fnc_view *, fsl_id_t,
			    const char *);
static int		 view_loop(struct fnc_view *);
static int		 show_timeline_view(struct fnc_view *);
static void		*tl_producer_thread(void *);
static int		 block_main_thread_signals(void);
static int		 build_commits(struct fnc_tl_thread_cx *);
static int		 commit_builder(struct fnc_commit_artifact **, fsl_id_t,
			    fsl_stmt *);
static int		 signal_tl_thread(struct fnc_view *, int);
static int		 draw_commits(struct fnc_view *);
static void		 parse_emailaddr_username(char **);
static int		 formatln(wchar_t **, int *, const char *, int, int);
static int		 multibyte_to_wchar(const char *, wchar_t **, size_t *);
static int		 write_commit_line(struct fnc_view *,
			    struct fnc_commit_artifact *, int);
static int		 view_input(struct fnc_view **, int *,
			    struct fnc_view *, struct view_tailhead *);
static int		 help(struct fnc_view *);
static int		 padpopup(struct fnc_view *, int, int, FILE *,
			    const char *);
static void		 centerprint(WINDOW *, int, int, int, const char *,
			    chtype);
static int		 tl_input_handler(struct fnc_view **, struct fnc_view *,
			    int);
static int		 timeline_scroll_down(struct fnc_view *, int);
static void		 timeline_scroll_up(struct fnc_tl_view_state *, int);
static void		 select_commit(struct fnc_tl_view_state *);
static int		 view_is_parent(struct fnc_view *);
static int		 make_splitscreen(struct fnc_view *);
static int		 make_fullscreen(struct fnc_view *);
static int		 view_split_start_col(int);
static int		 view_search_start(struct fnc_view *);
static int		 tl_search_init(struct fnc_view *);
static int		 tl_search_next(struct fnc_view *);
static bool		 find_commit_match(struct fnc_commit_artifact *,
			    regex_t *);
static int		 init_diff_commit(struct fnc_view **, int,
			    struct fnc_commit_artifact *, struct fnc_view *);
static int		 open_diff_view(struct fnc_view *,
			    struct fnc_commit_artifact *, int, bool, bool, bool,
			    struct fnc_view *, bool,
			    struct fnc_pathlist_head *);
static void		 show_diff_status(struct fnc_view *);
static int		 create_diff(struct fnc_diff_view_state *);
static int		 create_changeset(struct fnc_commit_artifact *);
static int		 write_commit_meta(struct fnc_diff_view_state *);
static int		 wrapline(char *, fsl_size_t ncols_avail,
			    struct fnc_diff_view_state *, off_t *);
static int		 add_line_offset(off_t **, size_t *, off_t);
static int		 diff_commit(fsl_buffer *, struct fnc_commit_artifact *,
			    int, int, int, struct fnc_pathlist_head *);
static int		 diff_checkout(fsl_buffer *, fsl_id_t, int, int, int,
			    struct fnc_pathlist_head *);
static int		 write_diff_meta(fsl_buffer *, const char *,
			    fsl_uuid_str, const char *, fsl_uuid_str, int,
			    enum fsl_ckout_change_e);
static int		 diff_file(fsl_buffer *, fsl_buffer *, const char *,
			    fsl_uuid_str, const char *, enum fsl_ckout_change_e,
			    int, int, bool);
static int		 diff_non_checkin(fsl_buffer *,
			    struct fnc_commit_artifact *, int, int, int);
static int		 diff_file_artifact(fsl_buffer *, fsl_id_t,
			    const fsl_card_F *, fsl_id_t, const fsl_card_F *,
			    fsl_ckout_change_e, int, int, int,
			    enum fnc_diff_type);
static int		 show_diff(struct fnc_view *);
static int		 write_diff(struct fnc_view *, char *);
static int		 match_line(const void *, const void *);
static int		 write_matched_line(int *, const char *, int, int,
			    WINDOW *, regmatch_t *);
static void		 draw_vborder(struct fnc_view *);
static int		 diff_input_handler(struct fnc_view **,
			    struct fnc_view *, int);
static int		 set_selected_commit(struct fnc_diff_view_state *,
			    struct commit_entry *);
static int		 diff_search_init(struct fnc_view *);
static int		 diff_search_next(struct fnc_view *);
static int		 view_close(struct fnc_view *);
static int		 map_repo_path(char **);
static bool		 path_is_child(const char *, const char *, size_t);
static int		 path_skip_common_ancestor(char **, const char *,
			    size_t, const char *, size_t);
static bool		 fnc_path_is_root_dir(const char *);
/* static bool		 fnc_path_is_cwd(const char *); */
static int		 fnc_pathlist_insert(struct fnc_pathlist_entry **,
			    struct fnc_pathlist_head *, const char *, void *);
static int		 fnc_path_cmp(const char *, const char *, size_t,
			    size_t);
static void		 fnc_pathlist_free(struct fnc_pathlist_head *);
static int		 browse_commit_tree(struct fnc_view **, int,
			    struct commit_entry *, const char *);
static int		 open_tree_view(struct fnc_view *, const char *,
			    fsl_id_t);
static int		 walk_tree_path(struct fnc_tree_view_state *,
			    struct fnc_repository_tree *,
			    struct fnc_tree_object **, const char *);
static int		 create_repository_tree(struct fnc_repository_tree **,
			    fsl_uuid_str *, fsl_id_t);
static int		 tree_builder(struct fnc_repository_tree *,
			    struct fnc_tree_object **, const char *);
/* static void		 delete_tree_node(struct fnc_tree_entry **, */
/*			    struct fnc_tree_entry *); */
static int		 link_tree_node(struct fnc_repository_tree *,
			    const char *, const char *, fsl_time_t);
static int		 show_tree_view(struct fnc_view *);
static int		 tree_input_handler(struct fnc_view **,
			    struct fnc_view *, int);
static int		 blame_tree_entry(struct fnc_view **, int,
			    struct fnc_tree_entry *, struct fnc_parent_trees *,
			    fsl_uuid_str);
static int		 tree_search_init(struct fnc_view *);
static int		 tree_search_next(struct fnc_view *);
static int		 tree_entry_path(char **, struct fnc_parent_trees *,
			    struct fnc_tree_entry *);
static int		 draw_tree(struct fnc_view *, const char *);
static int		 timeline_tree_entry(struct fnc_view **, int,
			    struct fnc_tree_view_state *);
static void		 tree_scroll_up(struct fnc_tree_view_state *, int);
static void		 tree_scroll_down(struct fnc_tree_view_state *, int);
static int		 visit_subtree(struct fnc_tree_view_state *,
			    struct fnc_tree_object *);
static int		 tree_entry_get_symlink_target(char **,
			    struct fnc_tree_entry *);
static int		 match_tree_entry(struct fnc_tree_entry *, regex_t *);
static void		 fnc_object_tree_close(struct fnc_tree_object *);
static void		 fnc_close_repository_tree(struct fnc_repository_tree *);
static int		 open_blame_view(struct fnc_view *, char *,
			    fsl_uuid_str, fsl_id_t, int);
static int		 run_blame(struct fnc_view *);
static int		 fnc_dump_buffer_to_file(off_t *, int *, off_t **,
			    FILE *, fsl_buffer *);
static int		 show_blame_view(struct fnc_view *);
static void		*blame_thread(void *);
static int		 blame_cb(void *, fsl_annotate_opt const * const,
			    fsl_annotate_step const * const);
static int		 draw_blame(struct fnc_view *);
static int		 blame_input_handler(struct fnc_view **,
			    struct fnc_view *, int);
static int		 blame_search_init(struct fnc_view *);
static int		 blame_search_next(struct fnc_view *);
static fsl_uuid_cstr	 get_selected_commit_id(struct fnc_blame_line *,
			    int, int, int);
static int		 fnc_commit_qid_alloc(struct fnc_commit_qid **,
			    fsl_uuid_cstr);
static int		 close_blame_view(struct fnc_view *);
static int		 stop_blame(struct fnc_blame *);
static int		 cancel_blame(void *);
static void		 fnc_commit_qid_free(struct fnc_commit_qid *);
static int		 fnc_load_branches(struct fnc_branch_view_state *);
static int		 create_tmp_branchlist_table(void);
static int		 alloc_branch(struct fnc_branch **, const char *,
			    double, bool, bool, bool);
static int		 fnc_branchlist_insert(struct fnc_branchlist_entry **,
			    struct fnc_branchlist_head *, struct fnc_branch *);
static int		 open_branch_view(struct fnc_view *, int, const char *,
			    double, int);
static int		 show_branch_view(struct fnc_view *);
static int		 branch_input_handler(struct fnc_view **,
			    struct fnc_view *, int);
static int		 tl_branch_entry(struct fnc_view **, int,
			    struct fnc_branchlist_entry *);
static int		 browse_branch_tree(struct fnc_view **, int,
			    struct fnc_branchlist_entry *);
static void		 branch_scroll_up(struct fnc_branch_view_state *, int);
static void		 branch_scroll_down(struct fnc_branch_view_state *,
			    int);
static int		 branch_search_next(struct fnc_view *);
static int		 branch_search_init(struct fnc_view *);
static int		 match_branchlist_entry(struct fnc_branchlist_entry *,
			    regex_t *);
static int		 close_branch_view(struct fnc_view *);
static void		 fnc_free_branches(struct fnc_branch_view_state *);
static void		 fnc_branch_close(struct fnc_branch *);
static void		 view_set_child(struct fnc_view *, struct fnc_view *);
static int		 view_close_child(struct fnc_view *);
static int		 close_tree_view(struct fnc_view *);
static int		 close_timeline_view(struct fnc_view *);
static int		 close_diff_view(struct fnc_view *);
static int		 view_resize(struct fnc_view *);
static int		 screen_is_split(struct fnc_view *);
static bool		 screen_is_shared(struct fnc_view *);
static void		 fnc_resizeterm(void);
static int		 join_tl_thread(struct fnc_tl_view_state *);
static void		 fnc_free_commits(struct commit_queue *);
static void		 fnc_commit_artifact_close(struct fnc_commit_artifact*);
static int		 fsl_list_object_free(void *, void *);
static void		 sigwinch_handler(int);
static void		 sigpipe_handler(int);
static void		 sigcont_handler(int);
static int		 strtonumcheck(int *, const char *, const int,
			    const int);
static int		 fnc_date_to_mtime(double *, const char *, int);
static char		*fnc_strsep (char **, const char *);
#ifdef __linux__
static size_t		 fnc_strlcat(char *, const char *, size_t);
static size_t		 fnc_strlcpy(char *, const char *, size_t);
#endif
static int		 set_colours(fsl_list *, enum fnc_view_id vid);
static int		 match_colour(const void *, const void *);
static bool		 fnc_home(struct fnc_view *);
static struct fnc_colour	*get_colour(fsl_list *, int);
static struct fnc_tree_entry	*get_tree_entry(struct fnc_tree_object *,
				    int);
static struct fnc_tree_entry	*find_tree_entry(struct fnc_tree_object *,
				    const char *, size_t);

int
main(int argc, const char **argv)
{
	fcli_command	*cmd = NULL;
	char		*path = NULL;
	int		 rc = 0;

	fnc_init.filter_types =
	    (struct artifact_types *)fsl_malloc(sizeof(struct artifact_types));
	fnc_init.filter_types->values = fsl_malloc(sizeof(char *));
	fnc_init.filter_types->nitems = 0;

	if (!setlocale(LC_CTYPE, ""))
		fsl_fprintf(stderr, "[!] Warning: Can't set locale.\n");

	fnc_init.cmdarg = argv[1];	/* Which cmd to show usage if needed. */
	fcli.clientFlags.verbose = 2;	/* Verbose error reporting. */
	fcli.cliFlags = fnc_init.cliflags_global;
	fcli.appHelp = &fnc_init.fnc_help;
	rc = fcli_setup(argc, argv);
	if (rc)
		goto end;

	if (fnc_init.vflag) {
		fnc_show_version();
		goto end;
	} else if (fnc_init.hflag)
		usage();
		/* NOT REACHED */

	rc = fcli_fingerprint_check(true);
	if (rc)
		goto end;

	if (argc == 1)
		cmd = &fnc_init.cmd_args[FNC_VIEW_TIMELINE];
	else {
		rc = fcli_dispatch_commands(fnc_init.cmd_args, false);
		if (rc == FSL_RC_NOT_FOUND && argc == 2) {
			/*
			 * Check if user entered fnc path/in/repo; if valid path
			 * is found, assume fnc timeline path/in/repo was meant.
			 */
			rc = map_repo_path(&path);
			if (rc == FSL_RC_NOT_FOUND || !path) {
				rc = RC(rc,
				    "'%s' is not a valid command or path",
				    argv[1]);
				fnc_init.err = rc;
				usage();
				/* NOT REACHED */
			} else if (rc)
				goto end;
			cmd = &fnc_init.cmd_args[FNC_VIEW_TIMELINE];
			fnc_init.path = path;
			fcli_err_reset(); /* cmd_timeline::fcli_process_flags */
		} else if (rc)
			goto end;
	}

	if ((rc = fcli_has_unused_args(false))) {
		fnc_init.err = rc;
		usage();
		/* NOT REACHED */
	}

	if (!fsl_cx_db_repo(fcli_cx())) {
		rc = RC(FSL_RC_MISUSE, "%s", "repository database required");
		goto end;
	}

	if (cmd != NULL)
		rc = cmd->f(cmd);
end:
	fsl_free(path);
	endwin();
	if (rc) {
		if (rc == FCLI_RC_HELP)
			rc = 0;
		else if (rc == FSL_RC_BREAK) {
			fsl_cx *f = fcli_cx();
			const char *errstr;
			fsl_error_get(&f->error, &errstr, NULL);
			fsl_fprintf(stdout, "%s", errstr);
			fcli_err_reset();  /* For fcli_end_of_main() */
			rc = 0;
		}
		else
			fsl_fprintf(stderr, "%s: %s %d\n", fcli_progname(),
			    fsl_rc_cstr(rc), rc);
	}
	putchar('\n');
	return fcli_end_of_main(rc);
}

static int
cmd_timeline(fcli_command const *argv)
{
	struct fnc_view	*v;
	fsl_cx		*f = fcli_cx();
	fsl_id_t	 rid = -1;
	char		*path = NULL;
	int		 rc = 0;

	rc = fcli_process_flags(argv->flags);
	if (rc || (rc = fcli_has_unused_flags(false)))
		return rc;

	if (fnc_init.nrecords.zlimit)
		if ((rc = strtonumcheck(&fnc_init.nrecords.limit,
		    fnc_init.nrecords.zlimit, INT_MIN, INT_MAX)))
			return rc;

	if (fnc_init.sym != NULL) {
		rc = fsl_sym_to_rid(f, fnc_init.sym, FSL_SATYPE_CHECKIN, &rid);
		if (rc || rid < 0)
			return RC(FSL_RC_TYPE,
			    "artifact [%s] not resolvable to a commit",
			    fnc_init.sym);
	}

	if (fnc_init.path)
		path = fsl_strdup(fnc_init.path);
	else
		rc = map_repo_path(&path);
	if (!rc)
		rc = init_curses();
	if (rc)
		goto end;
	v = view_open(0, 0, 0, 0, FNC_VIEW_TIMELINE);
	if (v == NULL) {
		RC(FSL_RC_ERROR, "%s", "view_open");
		goto end;
	}
	rc = open_timeline_view(v, rid, path);
	if (!rc)
		rc = view_loop(v);
end:
	fsl_free(path);
	return rc;
}

/*
 * Look for an in-repository path in **argv. If found, canonicalise it as an
 * absolute path relative to the repository root (e.g., /ckoutdir/found/path),
 * and assign to a dynamically allocated string in *requested_path, which the
 * caller must dispose of with fsl_free or free(3).
 */
static int
map_repo_path(char **requested_path)
{
	fsl_cx		*const f = fcli_cx();
	fsl_buffer	 buf = fsl_buffer_empty;
	char		*canonpath = NULL, *ckoutdir = NULL, *path = NULL;
	const char	*ckoutdir0 = NULL;
	fsl_size_t	 len;
	int		 rc = 0;
	bool		 root;

	*requested_path = NULL;

	/* If no path argument is supplied, default to repository root. */
	if (!fcli_next_arg(false)) {
		*requested_path = fsl_strdup("/");
		if (*requested_path == NULL)
			return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		return rc;
	}

	canonpath = fsl_strdup(fcli_next_arg(true));
	if (canonpath == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		goto end;
	}

	/*
	 * If no checkout (e.g., 'fnc timeline -R') copy the path verbatim to
	 * check its validity against a deck of F cards in open_timeline_view().
	 */
	ckoutdir0 = fsl_cx_ckout_dir_name(f, &len);
	if (!ckoutdir0) {
		path = fsl_strdup(canonpath);
		goto end;
	}

	path = realpath(canonpath, NULL);
	if (path == NULL && (errno == ENOENT || errno == ENOTDIR)) {
		/* Path is not on disk, assume it is relative to repo root. */
		rc = fsl_file_canonical_name2(ckoutdir0, canonpath, &buf, NULL);
		if (rc) {
			rc = RC(rc, "%s", "fsl_file_canonical_name2");
			goto end;
		}
		fsl_free(path);
		path = realpath(fsl_buffer_cstr(&buf), NULL);
		if (path) {
			/* Confirmed path is relative to repository root. */
			fsl_free(path);
			path = fsl_strdup(canonpath);
			if (path == NULL)
				rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		} else {
			rc = RC(fsl_errno_to_rc(errno, FSL_RC_NOT_FOUND),
			    "'%s' not found in tree", canonpath);
			*requested_path = fsl_strdup(canonpath);
		}
		goto end;
	}
	fsl_free(path);
	/*
	 * Use the cwd as the virtual root to canonicalise the supplied path if
	 * it is either: (a) relative; or (b) the root of the current checkout.
	 * Otherwise, use the root of the current checkout.
	 */
	rc = fsl_cx_getcwd(f, &buf);
	if (rc)
		goto end;
	ckoutdir = fsl_mprintf("%.*s", len - 1, ckoutdir0);
	root = fsl_strcmp(ckoutdir, fsl_buffer_cstr(&buf)) == 0;
	fsl_buffer_reuse(&buf);
	rc = fsl_ckout_filename_check(f, (canonpath[0] == '.' || !root) ?
	    true : false, canonpath, &buf);
	if (rc)
		goto end;
	fsl_free(canonpath);
	canonpath = fsl_strdup(fsl_buffer_str(&buf));

	if (canonpath[0] == '\0') {
		path = fsl_strdup(canonpath);
		if (path == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
	} else {
		fsl_buffer_reuse(&buf);
		rc = fsl_file_canonical_name2(f->ckout.dir, canonpath, &buf,
		    false);
		if (rc)
			goto end;
		path = fsl_strdup(fsl_buffer_str(&buf));
		if (path == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
		if (access(path, F_OK) != 0) {
			rc = RC(fsl_errno_to_rc(errno, FSL_RC_ACCESS),
			    "path does not exist or inaccessible [%s]", path);
			goto end;
		}
		/*
		 * Now we have an absolute path, check again if it's the ckout
		 * dir; if so, clear it to signal an open_timeline_view() check.
		 */
		len = fsl_strlen(path);
		if (!fsl_strcmp(path, f->ckout.dir)) {
			fsl_free(path);
			path = fsl_strdup("");
			if (path == NULL) {
				rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
				goto end;
			}
		} else if (len > f->ckout.dirLen && path_is_child(path,
		    f->ckout.dir, f->ckout.dirLen)) {
			char *child;
			/*
			 * Matched on-disk path within the repository; strip
			 * common prefix with repository root path.
			 */
			rc = path_skip_common_ancestor(&child, f->ckout.dir,
			    f->ckout.dirLen, path, len);
			if (rc)
				goto end;
			fsl_free(path);
			path = child;
		} else {
			/*
			 * Matched on-disk path outside the repository; treat
			 * as relative to repo root. (Though this should fail.)
			 */
			fsl_free(path);
			path = canonpath;
			canonpath = NULL;
		}
	}

	/* Trim trailing slash if it exists. */
	if (path[fsl_strlen(path) - 1] == '/')
		path[fsl_strlen(path) - 1] = '\0';

end:
	fsl_buffer_clear(&buf);
	fsl_free(canonpath);
	fsl_free(ckoutdir);
	if (rc)
		fsl_free(path);
	else {
		/* Make path absolute from repository root. */
		if (path[0] != '/' && (path[0] != '.' && path[1] != '/')) {
			char *abspath;
			if ((abspath = fsl_mprintf("/%s", path)) == NULL) {
				rc = RC(FSL_RC_ERROR, "%s", "fsl_mprintf");
				goto end;
			}
			fsl_free(path);
			path = abspath;
		}

		*requested_path = path;
	}
	return rc;
}

static bool
path_is_child(const char *child, const char *parent, size_t parentlen)
{
	if (parentlen == 0 || fnc_path_is_root_dir(parent))
		return true;

	if (fsl_strncmp(parent, child, parentlen) != 0)
		return false;
	if (child[parentlen - 1 /* Trailing slash */] != '/')
		return false;

	return true;
}

/*
 * As a special case, due to fsl_ckout_filename_check() resolving the current
 * checkout directory to ".", this function returns true for ".". For this
 * reason, when path is intended to be the current working directory for any
 * directory other than the repository root, callers must ensure path is either
 * absolute or relative to the respository root--not ".".
 */
static bool
fnc_path_is_root_dir(const char *path)
{
	while (*path == '/' || *path == '.')
		++path;
	return (*path == '\0');
}

static int
path_skip_common_ancestor(char **child, const char *parent_abspath,
    size_t parentlen, const char *abspath, size_t len)
{
	size_t	bufsz;
	int	rc = 0;

	*child = NULL;

	if (parentlen >= len)
		return RC(FSL_RC_RANGE, "invalid path [%s]", abspath);
	if (fsl_strncmp(parent_abspath, abspath, parentlen) != 0)
		return RC(FSL_RC_TYPE, "invalid path [%s]", abspath);
	if (!fnc_path_is_root_dir(parent_abspath) &&
	    abspath[parentlen - 1 /* Trailing slash */] != '/')
		return RC(FSL_RC_TYPE, "invalid path [%s]", abspath);
	while (abspath[parentlen] == '/')
		++abspath;
	bufsz = len - parentlen + 1;
	*child = fsl_malloc(bufsz);
	if (*child == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_malloc");
	if (strlcpy(*child, abspath + parentlen, bufsz) >= bufsz) {
		rc = RC(FSL_RC_RANGE, "%s", "strlcpy");
		fsl_free(*child);
		*child = NULL;
	}
	return rc;
}

#if 0
static bool
fnc_path_is_cwd(const char *path)
{
	return (path[0] == '.' && path[1] == '\0');
}
#endif

static int
init_curses(void)
{
	initscr();
	cbreak();
	noecho();
	nonl();
	intrflush(stdscr, FALSE);
	keypad(stdscr, TRUE);
	curs_set(0);
	set_escdelay(0);  /* ESC should return immediately. */
#ifndef __linux__
	typeahead(-1);	/* Don't disrupt screen update operations. */
#endif

	if (!fnc_init.nocolour && has_colors()) {
		start_color();
		use_default_colors();
	}

	if (sigaction(SIGPIPE, &(struct sigaction){{sigpipe_handler}}, NULL)
	    == -1)
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
		    "%s", "sigaction(SIGPIPE)");
	if (sigaction(SIGWINCH, &(struct sigaction){{sigwinch_handler}}, NULL)
	    == -1)
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
		    "%s", "sigaction(SIGWINCH)");
	if (sigaction(SIGCONT, &(struct sigaction){{sigcont_handler}}, NULL)
	    == -1)
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
		    "%s", "sigaction(SIGCONT)");

	return 0;
}

static struct fnc_view *
view_open(int nlines, int ncols, int start_ln, int start_col,
    enum fnc_view_id vid)
{
	struct fnc_view *view = calloc(1, sizeof(*view));

	if (view == NULL)
		return NULL;

	view->vid = vid;
	view->lines = LINES;
	view->cols = COLS;
	view->nlines = nlines ? nlines : LINES - start_ln;
	view->ncols = ncols ? ncols : COLS - start_col;
	view->start_ln = start_ln;
	view->start_col = start_col;
	view->window = newwin(nlines, ncols, start_ln, start_col);
	if (view->window == NULL) {
		view_close(view);
		return NULL;
	}
	view->panel = new_panel(view->window);
	if (view->panel == NULL || set_panel_userptr(view->panel, view) != OK) {
		view_close(view);
		return NULL;
	}

	keypad(view->window, TRUE);
	return view;
}

static int
open_timeline_view(struct fnc_view *view, fsl_id_t rid, const char *path)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	fsl_cx				*f = fcli_cx();
	fsl_db				*db = fsl_cx_db_repo(f);
	fsl_buffer			 sql = fsl_buffer_empty;
	char				*startdate = NULL;
	fsl_id_t			 idtag = 0;
	int				 idx, rc = 0;

	if (path != s->path) {
		fsl_free(s->path);
		s->path = fsl_strdup(path);
		if (s->path == NULL)
			return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
	}

	/*
	 * TODO: See about opening this API.
	 * If a path has been supplied, create a table of all path's
	 * ancestors and add "AND blob.rid IN fsl_computed_ancestors" to query.
	 */
	/* if (path[1]) { */
	/*	rc = fsl_compute_ancestors(db, rid, 0, 0); */
	/*	if (rc) */
	/*		return RC(FSL_RC_DB, "%s", "fsl_compute_ancestors"); */
	/* } */
	s->thread_cx.q = NULL;
	/* s->selected_idx = 0; */	/* Unnecessary? */

	TAILQ_INIT(&s->commits.head);
	s->commits.ncommits = 0;

	if (rid != -1)
		startdate = fsl_mprintf("(SELECT mtime FROM event "
		    "WHERE objid=%d)", rid);
	else
		fsl_ckout_version_info(f, NULL, &s->curr_ckout_uuid);

	/*
	 * In 'fnc timeline -R repo.fossil path' case, check that path is a
	 * valid repository path in the repository tree as at either the
	 * latest check-in or the specified commit.
	 */
	if (s->curr_ckout_uuid == NULL && path[1]) {
		fsl_deck d = fsl_deck_empty;
		bool ispath = false;
		rc = fsl_deck_load_sym(f, &d, fnc_init.sym ? fnc_init.sym :
		    "tip", FSL_SATYPE_CHECKIN);
		fsl_deck_F_rewind(&d);
		if (fsl_deck_F_search(&d, path + 1 /* Slash */) == NULL) {
			const fsl_card_F *cf;
			fsl_deck_F_next(&d, &cf);
			do {
				fsl_deck_F_next(&d, &cf);
				if (cf && !fsl_strncmp(path + 1 /* Slash */,
				    cf->name, fsl_strlen(path) - 1)) {
					ispath = true;
					break;
				}
			} while (cf);
		} else
			ispath = true;
		fsl_deck_finalize(&d);
		if (!ispath)
			return RC(FSL_RC_NOT_FOUND, "'%s' invalid path in [%s]",
			    path + 1, fnc_init.sym ? fnc_init.sym : "tip");
	}

	if ((rc = pthread_cond_init(&s->thread_cx.commit_consumer, NULL))) {
		RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_cond_init");
		goto end;
	}
	if ((rc = pthread_cond_init(&s->thread_cx.commit_producer, NULL))) {
		RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_cond_init");
		goto end;
	}

	fsl_buffer_appendf(&sql, "SELECT "
            /* 0 */"uuid, "
	    /* 1 */"datetime(event.mtime%s), "
	    /* 2 */"coalesce(euser, user), "
	    /* 3 */"rid AS rid, "
	    /* 4 */"event.type AS eventtype, "
	    /* 5 */"(SELECT group_concat(substr(tagname,5), ',') "
	    "FROM tag, tagxref WHERE tagname GLOB 'sym-*' "
	    "AND tag.tagid=tagxref.tagid AND tagxref.rid=blob.rid "
	    "AND tagxref.tagtype > 0) as tags, "
	    /*6*/"coalesce(ecomment, comment) AS comment FROM event JOIN blob "
	    "WHERE blob.rid=event.objid", fnc_init.utc ? "" : ", 'localtime'");

	if (fnc_init.filter_types->nitems) {
		fsl_buffer_appendf(&sql, " AND (");
		for (idx = 0; idx < fnc_init.filter_types->nitems; ++idx) {
			fsl_buffer_appendf(&sql, " eventtype=%Q%s",
			    fnc_init.filter_types->values[idx], (idx + 1) <
			    fnc_init.filter_types->nitems ? " OR " : ")");
			/* This produces a double-free? */
			/* fsl_free((char *)fnc_init.filter_types->values[idx]); */
			fnc_init.filter_types->values[idx] = NULL;
		}
		fsl_free(fnc_init.filter_types->values);
		fsl_free(fnc_init.filter_types);
	}

	if (fnc_init.filter_branch) {
		idtag = fsl_db_g_id(db, 0,
                    "SELECT tagid FROM tag WHERE tagname='sym-%q'",
                    fnc_init.filter_branch);
		if (idtag > 0)
			fsl_buffer_appendf(&sql,
                             " AND EXISTS(SELECT 1 FROM tagxref"
                             " WHERE tagid=%"FSL_ID_T_PFMT
                             " AND tagtype > 0 AND rid=blob.rid)", idtag);
		else {
			rc = RC(FSL_RC_NOT_FOUND, "Invalid branch name [%s]",
			    fnc_init.filter_branch);
			goto end;
		}
	}

	if (fnc_init.filter_tag) {
		idtag = fsl_db_g_id(db, 0,
                    "SELECT tagid FROM tag WHERE tagname GLOB 'sym-%q'",
                    fnc_init.filter_tag);
                if (idtag == 0)
			idtag = fsl_db_g_id(db, 0,
			    "SELECT tagid FROM tag WHERE tagname='%q'",
			    fnc_init.filter_tag);
		if (idtag > 0)
			fsl_buffer_appendf(&sql,
                             " AND EXISTS(SELECT 1 FROM tagxref"
                             " WHERE tagid=%"FSL_ID_T_PFMT
                             " AND tagtype > 0 AND rid=blob.rid)", idtag);
		else {
			rc = RC(FSL_RC_NOT_FOUND, "Invalid tag [%s]",
			    fnc_init.filter_tag);
			goto end;
		}
	}

	if (fnc_init.filter_user)
		if ((rc = fsl_buffer_appendf(&sql,
                    " AND coalesce(euser, user) GLOB lower('*%q*')",
                    fnc_init.filter_user)))
		goto end;

	if (startdate) {
		fsl_buffer_appendf(&sql, " AND event.mtime <= %s", startdate);
		fsl_free(startdate);
	}

	/*
	 * If path is not root ("/"), a versioned path in the repository has
	 * been requested, only retrieve commits involving path.
	 */
	if (path[1]) {
		fsl_buffer_appendf(&sql,
		    " AND EXISTS(SELECT 1 FROM mlink"
		    " WHERE mlink.mid = event.objid"
		    " AND mlink.fnid IN ");
		if (fsl_cx_is_case_sensitive(f)) {
			fsl_buffer_appendf(&sql,
			    "(SELECT fnid FROM filename"
			    " WHERE name = %Q OR name GLOB '%q/*')",
			    path + 1, path + 1);  /* Skip prepended slash. */
		} else {
			fsl_buffer_appendf(&sql,
			    "(SELECT fnid FROM filename"
			    " WHERE name = %Q COLLATE nocase"
			    " OR lower(name) GLOB lower('%q/*'))",
			    path + 1, path + 1);  /* Skip prepended slash. */
		}
		fsl_buffer_append(&sql, ")", 1);
	}

	fsl_buffer_appendf(&sql, " ORDER BY event.mtime DESC");

	if (fnc_init.nrecords.limit > 0)
		fsl_buffer_appendf(&sql, " LIMIT %d", fnc_init.nrecords.limit);

	view->show = show_timeline_view;
	view->input = tl_input_handler;
	view->close = close_timeline_view;
	view->search_init = tl_search_init;
	view->search_next = tl_search_next;

	s->thread_cx.q = fsl_stmt_malloc();
	rc = fsl_db_prepare(db, s->thread_cx.q, "%b", &sql);
	if (rc) {
		rc = RC(rc, "%s", "fsl_db_prepare");
		goto end;
	}
	rc = fsl_stmt_step(s->thread_cx.q);
	if (rc) {
		switch (rc) {
		case FSL_RC_STEP_ROW:
			rc = 0;
			break;
		case FSL_RC_STEP_ERROR:
			rc = RC(rc, "%s", "fsl_stmt_step");
			goto end;
		case FSL_RC_STEP_DONE:
			rc = RC(FSL_RC_BREAK, "%s", "no matching records");
			goto end;
		}
	}

	s->colour = !fnc_init.nocolour && has_colors();
	s->thread_cx.rc = 0;
	s->thread_cx.db = db;
	s->thread_cx.spin_idx = 0;
	s->thread_cx.ncommits_needed = view->nlines - 1;
	s->thread_cx.commits = &s->commits;
	s->thread_cx.timeline_end = false;
	s->thread_cx.quit = &s->quit;
	s->thread_cx.first_commit_onscreen = &s->first_commit_onscreen;
	s->thread_cx.selected_commit = &s->selected_commit;
	s->thread_cx.searching = &view->searching;
	s->thread_cx.search_status = &view->search_status;
	s->thread_cx.regex = &view->regex;
	s->thread_cx.path = s->path;

	if (s->colour)
		set_colours(&s->colours, FNC_VIEW_TIMELINE);
end:
	fsl_buffer_clear(&sql);
	if (rc) {
		close_timeline_view(view);
		if (db->error.code)
			rc = fsl_cx_uplift_db_error(f, db);
	}
	return rc;
}

static int
view_loop(struct fnc_view *view)
{
	struct view_tailhead	 views;
	struct fnc_view		*new_view;
	int			 done = 0, err = 0, rc = 0;

	if ((rc = pthread_mutex_lock(&fnc_mutex)))
		return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_lock");

	TAILQ_INIT(&views);
	TAILQ_INSERT_HEAD(&views, view, entries);

	view->active = true;
	rc = view->show(view);
	if (rc)
		return rc;

	while (!TAILQ_EMPTY(&views) && !done && !rec_sigpipe) {
		rc = view_input(&new_view, &done, view, &views);
		if (rc)
			break;
		if (view->egress) {
			struct fnc_view *v, *prev = NULL;

			if (view_is_parent(view))
				prev = TAILQ_PREV(view, view_tailhead, entries);
			else if (view->parent)
				prev = view->parent;

			if (view->parent) {
				view->parent->child = NULL;
				view->parent->focus_child = false;
			} else
				TAILQ_REMOVE(&views, view, entries);

			rc = view_close(view);
			if (rc)
				goto end;

			view = NULL;
			TAILQ_FOREACH(v, &views, entries) {
				if (v->active)
					break;
			}
			if (view == NULL && new_view == NULL) {
				/* No view is active; try to pick one. */
				if (prev)
					view = prev;
				else if (!TAILQ_EMPTY(&views))
					view = TAILQ_LAST(&views,
					    view_tailhead);
				if (view) {
					if (view->focus_child) {
						view->child->active = true;
						view = view->child;
					} else
						view->active = true;
				}
			}
		}
		if (new_view) {
			struct fnc_view *v, *t;
			/* Allow only one parent view per type. */
			TAILQ_FOREACH_SAFE(v, &views, entries, t) {
				if (v->vid != new_view->vid)
					continue;
				TAILQ_REMOVE(&views, v, entries);
				rc = view_close(v);
				if (rc)
					goto end;
				break;
			}
			TAILQ_INSERT_TAIL(&views, new_view, entries);
			view = new_view;
		}
		if (view) {
			if (view_is_parent(view)) {
				if (view->child && view->child->active)
					view = view->child;
			} else {
				if (view->parent && view->parent->active)
					view = view->parent;
			}
			show_panel(view->panel);
			if (view->child && screen_is_split(view->child))
				show_panel(view->child->panel);
			if (view->parent && screen_is_split(view)) {
				rc = view->parent->show(view->parent);
				if (rc)
					goto end;
			}
			rc = view->show(view);
			if (rc)
				goto end;
			if (view->child) {
				rc = view->child->show(view->child);
#ifdef __linux__
				wnoutrefresh(view->child->window);
#endif
				if (rc)
					goto end;
			}
#ifdef __linux__
			wnoutrefresh(view->window);
#else
			update_panels();
#endif
			doupdate();
		}
	}
end:
	while (!TAILQ_EMPTY(&views)) {
		view = TAILQ_FIRST(&views);
		TAILQ_REMOVE(&views, view, entries);
		view_close(view);
	}

	if ((err = pthread_mutex_unlock(&fnc_mutex)) && !rc)
		rc = RC(fsl_errno_to_rc(err, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_unlock");

	return rc;
}

static int
show_timeline_view(struct fnc_view *view)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	int				 rc = 0;

	if (!s->thread_id) {
		rc = pthread_create(&s->thread_id, NULL, tl_producer_thread,
		    &s->thread_cx);
		if (rc)
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_create");
		if (s->thread_cx.ncommits_needed > 0) {
			rc = signal_tl_thread(view, 1);
			if (rc)
				return rc;
		}
	}

	return draw_commits(view);
}

static void *
tl_producer_thread(void *state)
{
	struct fnc_tl_thread_cx	*cx = state;
	int			 rc;
	bool			 done = false;

	rc = block_main_thread_signals();
	if (rc)
		return (void *)(intptr_t)rc;

	while (!done && !rc && !rec_sigpipe) {
		switch (rc = build_commits(cx)) {
		case FSL_RC_STEP_DONE:
			done = true;
			/* FALL THROUGH */
		case FSL_RC_STEP_ROW:
			rc = 0;
			/* FALL THROUGH */
		default:
			if (rc) {
				cx->rc = rc;
				return (void *)(intptr_t)rc;
			}
			else if (cx->ncommits_needed > 0)
				cx->ncommits_needed--;
			break;
		}

		if ((rc = pthread_mutex_lock(&fnc_mutex))) {
			rc = RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_lock");
			break;
		} else if (*cx->first_commit_onscreen == NULL) {
			*cx->first_commit_onscreen =
			    TAILQ_FIRST(&cx->commits->head);
			*cx->selected_commit = *cx->first_commit_onscreen;
		} else if (*cx->quit)
			done = true;

		if ((rc = pthread_cond_signal(&cx->commit_producer))) {
			rc = RC(fsl_errno_to_rc(rc, FSL_RC_MISUSE),
			    "%s", "pthread_cond_signal");
			pthread_mutex_unlock(&fnc_mutex);
			break;
		}

		if (done)
			cx->ncommits_needed = 0;
		else if (cx->ncommits_needed == 0) {
			if ((rc = pthread_cond_wait(&cx->commit_consumer,
			    &fnc_mutex)))
				rc = RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
				    "%s", "pthread_cond_wait");
			if (*cx->quit)
				done = true;
		}

		if ((rc = pthread_mutex_unlock(&fnc_mutex)))
			rc = RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_unlock");
	}

	cx->timeline_end = true;
	return (void *)(intptr_t)rc;
}

static int
block_main_thread_signals(void)
{
	sigset_t	 set;

	if (sigemptyset(&set) == -1)
		return RC(fsl_errno_to_rc(errno, FSL_RC_MISUSE), "%s",
		    "sigemptyset");

	/* Bespoke signal handlers for SIGWINCH and SIGCONT. */
	if (sigaddset(&set, SIGWINCH) == -1)
		return RC(fsl_errno_to_rc(errno, FSL_RC_MISUSE), "%s",
		    "sigaddset");
	if (sigaddset(&set, SIGCONT) == -1)
		return RC(fsl_errno_to_rc(errno, FSL_RC_MISUSE), "%s",
		    "sigaddset");

	/* ncurses handles SIGTSTP. */
	if (sigaddset(&set, SIGTSTP) == -1)
		return RC(fsl_errno_to_rc(errno, FSL_RC_MISUSE), "%s",
		    "sigaddset");

	if (pthread_sigmask(SIG_BLOCK, &set, NULL))
		return RC(fsl_errno_to_rc(errno, FSL_RC_MISUSE), "%s",
		    "pthread_sigmask");

	return 0;
}

static int
build_commits(struct fnc_tl_thread_cx *cx)
{
	int		 rc = 0;

	if (cx->tree_open) {
		/*
		 * XXX If a tree has been opened with the 't' key binding, the
		 * commit builder statement needs to be reset otherwise one of
		 * the SQLite3 APIs down the fsl_stmt_step() call stack fails,
		 * irrespective of whether fsl_db_prepare_cached() is called.
		 */
		fsl_size_t loaded = cx->q->rowCount;
		cx->tree_open = false;
		rc = fsl_stmt_reset(cx->q);
		if (rc)
			return RC(rc, "%s", "fsl_stmt_reset");
		while (loaded--)
			if ((rc = fsl_stmt_step(cx->q)) != FSL_RC_STEP_ROW)
				return RC(rc, "%s", "fsl_stmt_step");
	}
	/*
	 * Step through the given SQL query, passing each row to the commit
	 * builder to build commits for the timeline.
	 */
	do {
		struct fnc_commit_artifact	*commit = NULL;
		struct commit_entry		*dup_entry, *entry;

		rc = commit_builder(&commit, 0, cx->q);
		if (rc)
			return RC(rc, "%s", "commit_builder");
		/*
		 * TODO: Find out why, without this, fnc reads and displays
		 * the first (i.e., latest) commit twice. This hack checks to
		 * see if the current row returned a UUID matching the last
		 * commit added to the list to avoid adding a duplicate entry.
		 */
		dup_entry = TAILQ_FIRST(&cx->commits->head);
		if (cx->commits->ncommits == 1 &&
		    !fsl_strcmp(dup_entry->commit->uuid, commit->uuid)) {
			fnc_commit_artifact_close(commit);
			cx->ncommits_needed++;
			continue;
		}

		entry = fsl_malloc(sizeof(*entry));
		if (entry == NULL)
			return RC(FSL_RC_ERROR, "%s", "fsl_malloc");

		entry->commit = commit;

		rc = pthread_mutex_lock(&fnc_mutex);
		if (rc)
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_lock");

		entry->idx = cx->commits->ncommits;
		TAILQ_INSERT_TAIL(&cx->commits->head, entry, entries);
		cx->commits->ncommits++;

		if (!cx->endjmp && *cx->searching == SEARCH_FORWARD &&
		    *cx->search_status == SEARCH_WAITING) {
			if (find_commit_match(commit, cx->regex))
				*cx->search_status = SEARCH_CONTINUE;
		}

		rc = pthread_mutex_unlock(&fnc_mutex);
		if (rc)
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_unlock");

	} while ((rc = fsl_stmt_step(cx->q)) == FSL_RC_STEP_ROW
	    && *cx->searching == SEARCH_FORWARD
	    && *cx->search_status == SEARCH_WAITING);

	return rc;
}

/*
 * Given prepared SQL statement q _XOR_ record ID rid, allocate and build the
 * corresponding commit artifact from the result set. The commit must
 * eventually be disposed of with fnc_commit_artifact_close().
 */
static int
commit_builder(struct fnc_commit_artifact **ptr, fsl_id_t rid, fsl_stmt *q)
{
	fsl_cx				*f = fcli_cx();
	fsl_db				*db = fsl_needs_repo(f);
	struct fnc_commit_artifact	*commit = NULL;
	fsl_buffer			 buf = fsl_buffer_empty;
	const char			*comment, *prefix, *type;
	int				 rc = 0;
	enum fnc_diff_type		 diff_type = FNC_DIFF_WIKI;

	if (rid) {
		rc = fsl_db_prepare(db, q, "SELECT "
		    /* 0 */"uuid, "
		    /* 1 */"datetime(event.mtime%s), "
		    /* 2 */"coalesce(euser, user), "
		    /* 3 */"rid AS rid, "
		    /* 4 */"event.type AS eventtype, "
		    /* 5 */"(SELECT group_concat(substr(tagname,5), ',') "
		    "FROM tag, tagxref WHERE tagname GLOB 'sym-*' "
		    "AND tag.tagid=tagxref.tagid AND tagxref.rid=blob.rid "
		    "AND tagxref.tagtype > 0) as tags, "
		    /*6*/"coalesce(ecomment, comment) AS comment "
		    "FROM event JOIN blob WHERE blob.rid=%d AND event.objid=%d",
		    fnc_init.utc ? "" : ", 'localtime'", rid, rid);
		if (rc)
			return RC(FSL_RC_DB, "%s", "fsl_db_prepare");
		fsl_stmt_step(q);
	}

	type = fsl_stmt_g_text(q, 4, NULL);
	comment = fsl_stmt_g_text(q, 6, NULL);
	prefix = NULL;

	switch (*type) {
	case 'c':
		type = "checkin";
		diff_type = FNC_DIFF_COMMIT;
		break;
	case 'w':
		type = "wiki";
		if (comment) {
			switch (*comment) {
			case '+':
				prefix = "Added: ";
				++comment;
				break;
			case '-':
				prefix = "Deleted: ";
				++comment;
				break;
			case ':':
				prefix = "Edited: ";
				++comment;
				break;
			default:
				break;
			}
			if (prefix)
				rc = fsl_buffer_append(&buf, prefix, -1);
		}
		break;
	case 'g':
		type = "tag";
		break;
	case 'e':
		type = "technote";
		break;
	case 't':
		type = "ticket";
		break;
	case 'f':
		type = "forum";
		break;
	};
	if (!rc && comment)
		rc = fsl_buffer_append(&buf, comment, -1);
	if (rc) {
		rc = RC(rc, "%s", "fsl_buffer_append");
		goto end;
	}

	commit = calloc(1, sizeof(*commit));
	if (commit == NULL) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_ERROR), "%s", "calloc");
		goto end;
	}

	if (!rid && (rc = fsl_stmt_get_id(q, 3, &rid))) {
		rc = RC(rc, "%s", "fsl_stmt_get_id");
		goto end;
	}
	/* Is there a more efficient way to get the parent? */
	commit->puuid = fsl_db_g_text(db, NULL,
	    "SELECT uuid FROM plink, blob WHERE plink.cid=%d "
	    "AND blob.rid=plink.pid AND plink.isprim", rid);
	commit->prid = fsl_uuid_to_rid(f, commit->puuid);
	commit->uuid = fsl_strdup(fsl_stmt_g_text(q, 0, NULL));
	commit->rid = rid;
	commit->type = fsl_strdup(type);
	commit->diff_type = diff_type;
	commit->timestamp = fsl_strdup(fsl_stmt_g_text(q, 1, NULL));
	commit->user = fsl_strdup(fsl_stmt_g_text(q, 2, NULL));
	commit->branch = fsl_strdup(fsl_stmt_g_text(q, 5, NULL));
	commit->comment = fsl_strdup(comment ? fsl_buffer_str(&buf) : "");
	fsl_buffer_clear(&buf);

	*ptr = commit;
end:
	return rc;
}

static int
signal_tl_thread(struct fnc_view *view, int wait)
{
	struct fnc_tl_thread_cx	*cx = &view->state.timeline.thread_cx;
	int			 rc = 0;

	while (cx->ncommits_needed > 0) {
		if (cx->timeline_end)
			break;

		/* Wake timeline thread. */
		if ((rc = pthread_cond_signal(&cx->commit_consumer)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_MISUSE),
			    "%s", "pthread_cond_signal");

		/*
		 * Mutex will be released while view_loop().view_input() waits
		 * in wgetch(), at which point the timeline thread will run.
		 */
		if (!wait)
			break;

		/* Show status update in timeline view. */
		show_timeline_view(view);
		update_panels();
		doupdate();

		/* Wait while the next commit is being loaded. */
		if ((rc = pthread_cond_wait(&cx->commit_producer, &fnc_mutex)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_cond_wait");

		/* Show status update in timeline view. */
		show_timeline_view(view);
		update_panels();
		doupdate();
	}

	return cx->rc;
}

static int
draw_commits(struct fnc_view *view)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	struct fnc_tl_thread_cx		*tcx = &s->thread_cx;
	struct commit_entry		*entry = s->selected_commit;
	struct fnc_colour		*c = NULL;
	const char			*search_str = NULL;
	char				*headln = NULL, *idxstr = NULL;
	char				*branch = NULL, *type = NULL;
	char				*uuid = NULL;
	wchar_t				*wcstr;
	int				 ncommits = 0, rc = 0, wstrlen = 0;
	int				 ncols_needed, max_usrlen = -1;

	if (s->selected_commit && !(view->searching != SEARCH_DONE &&
	    view->search_status == SEARCH_WAITING)) {
		uuid = fsl_strdup(s->selected_commit->commit->uuid);
		branch = fsl_strdup(s->selected_commit->commit->branch);
		type = fsl_strdup(s->selected_commit->commit->type);
	}

	if (s->thread_cx.ncommits_needed > 0) {
		if ((idxstr = fsl_mprintf(" [%d/%d] %s",
		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
		    (view->searching && !view->search_status) ?
		    "searching..." : "loading...")) == NULL) {
			rc = RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
			goto end;
		}
	} else {
		if (view->searching) {
			if (view->search_status == SEARCH_COMPLETE)
				search_str = "no more matches";
			else if (view->search_status == SEARCH_NO_MATCH)
				search_str = "no matches found";
			else if (view->search_status == SEARCH_WAITING)
				search_str = "searching...";
		}

		if ((idxstr = fsl_mprintf("%s [%d/%d] %s",
		    !fsl_strcmp(uuid, s->curr_ckout_uuid) ? " [current]" : "",
		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
		    search_str ? search_str : (branch ? branch : "")))
		    == NULL) {
			rc = RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
			goto end;
		}
	}
	/*
	 * Compute cols needed to fit all components of the headline to truncate
	 * the hash component if needed. wiki, tag, and ticket artifacts don't
	 * have a branch component, checkins and some technotes do, so add a col
	 * for the space separator. Same applies if search_str is being shown.
	 */
	ncols_needed = fsl_strlen(type) + fsl_strlen(idxstr) + FSL_STRLEN_K256
	    + (!search_str && (!fsl_strcmp(type, "wiki") ||
	    !fsl_strcmp(type, "tag")  || !fsl_strcmp(type, "ticket") ||
	    (!branch && !fsl_strcmp(type, "technote"))) ? 0 : 1);
	/* If a path has been requested, display it in the headline. */
	if (s->path[1]) {
		if ((headln = fsl_mprintf("%s%c%.*s %s%s", type ? type : "",
		    type ? ' ' : SPINNER[tcx->spin_idx], view->ncols <
		    ncols_needed ? view->ncols - (ncols_needed -
		    FSL_STRLEN_K256) : FSL_STRLEN_K256, uuid ? uuid :
		    "........................................",
		    s->path, idxstr)) == NULL) {
			rc = RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
			headln = NULL;
			goto end;
		}
	} else if ((headln = fsl_mprintf("%s%c%.*s%s", type ? type : "", type ?
	    ' ' : SPINNER[tcx->spin_idx], view->ncols < ncols_needed ?
	    view->ncols - (ncols_needed - FSL_STRLEN_K256) : FSL_STRLEN_K256,
	    uuid ? uuid : "........................................", idxstr))
	    == NULL) {
		rc = RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
		headln = NULL;
		goto end;
	}
	if (SPINNER[++tcx->spin_idx] == '\0')
		tcx->spin_idx = 0;
	rc = formatln(&wcstr, &wstrlen, headln, view->ncols, 0);
	if (rc)
		goto end;

	werase(view->window);

	if (screen_is_shared(view))
		wstandout(view->window);
	if (s->colour)
		c = get_colour(&s->colours, FNC_COMMIT_ID);
	if (c)
		wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
	waddwstr(view->window, wcstr);
	if (c)
		wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
	while (wstrlen < view->ncols) {
		waddch(view->window, ' ');
		++wstrlen;
	}
	if (screen_is_shared(view))
		wstandend(view->window);
	fsl_free(wcstr);
	if (view->nlines <= 1)
		goto end;

	/* Parse commits to be written on screen for the longest username. */
	entry = s->first_commit_onscreen;
	while (entry) {
		wchar_t		*usr_wcstr;
		char		*user;
		int		 usrlen;
		if (ncommits >= view->nlines - 1)
			break;
		user = fsl_strdup(entry->commit->user);
		if (user == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
		if (strpbrk(user, "<@>") != NULL)
			parse_emailaddr_username(&user);
		rc = formatln(&usr_wcstr, &usrlen, user, view->ncols, 0);
		if (max_usrlen < usrlen)
			max_usrlen = usrlen;
		fsl_free(usr_wcstr);
		fsl_free(user);
		++ncommits;
		entry = TAILQ_NEXT(entry, entries);
	}

	ncommits = 0;
	entry = s->first_commit_onscreen;
	s->last_commit_onscreen = s->first_commit_onscreen;
	while (entry) {
		if (ncommits >= view->nlines - 1)
			break;
		if (ncommits == s->selected_idx)
			wattr_on(view->window, A_REVERSE, NULL);
		rc = write_commit_line(view, entry->commit, max_usrlen);
		if (ncommits == s->selected_idx)
			wattr_off(view->window, A_REVERSE, NULL);
		++ncommits;
		s->last_commit_onscreen = entry;
		entry = TAILQ_NEXT(entry, entries);
	}
	draw_vborder(view);

end:
	free(branch);
	free(type);
	free(uuid);
	free(idxstr);
	free(headln);
	return rc;
}

static void
parse_emailaddr_username(char **username)
{
	char	*lt, *usr;

	lt = strchr(*username, '<');
	if (lt && lt[1] != '\0') {
		usr = fsl_strdup(++lt);
		fsl_free(*username);
	} else
		usr = *username;
	usr[strcspn(usr, "@>")] = '\0';

	*username = usr;
}

static int
formatln(wchar_t **ptr, int *wstrlen, const char *mbstr, int column_limit,
    int start_column)
{
	wchar_t		*wline = NULL;
	size_t		 i, wlen;
	int		 rc = 0, cols = 0;

	*ptr = NULL;
	*wstrlen = 0;

	rc = multibyte_to_wchar(mbstr, &wline, &wlen);
	if (rc)
		return rc;

	if (wlen > 0 && wline[wlen - 1] == L'\n') {
		wline[wlen - 1] = L'\0';
		wlen--;
	}
	if (wlen > 0 && wline[wlen - 1] == L'\r') {
		wline[wlen - 1] = L'\0';
		wlen--;
	}

	i = 0;
	while (i < wlen) {
		int width = wcwidth(wline[i]);

		if (width == 0) {
			i++;
			continue;
		}

		if (width == 1 || width == 2) {
			if (cols + width > column_limit)
				break;
			cols += width;
			i++;
		} else if (width == -1) {
			if (wline[i] == L'\t') {
				width = TABSIZE -
				    ((cols + column_limit) % TABSIZE);
			} else {
				width = 1;
				wline[i] = L'.';
			}
			if (cols + width > column_limit)
				break;
			cols += width;
			i++;
		} else {
			rc = RC(FSL_RC_RANGE, "%s", "wcwidth");
			goto end;
		}
	}
	wline[i] = L'\0';
	if (wstrlen)
		*wstrlen = cols;
end:
	if (rc)
		free(wline);
	else
		*ptr = wline;
	return rc;
}

static int
multibyte_to_wchar(const char *src, wchar_t **dst, size_t *dstlen)
{
	int	rc = 0;

	/*
	 * mbstowcs POSIX extension specifies that the number of wchar that
	 * would be written are returned when first arg is a null pointer:
	 * https://en.cppreference.com/w/cpp/string/multibyte/mbstowcs
	 */
	*dstlen = mbstowcs(NULL, src, 0);
	if (*dstlen == (size_t)-1) {
		if (errno == EILSEQ)
			return RC(FSL_RC_RANGE,
			    "invalid multibyte character [%s]", src);
		return RC(FSL_RC_MISUSE, "mbstowcs(%s)", src);
	}


	*dst = NULL;
	*dst = fsl_malloc(sizeof(wchar_t) * (*dstlen + 1));
	if (*dst == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "malloc");
		goto end;
	}

	if (mbstowcs(*dst, src, *dstlen) != *dstlen)
		rc = RC(FSL_RC_SIZE_MISMATCH, "mbstowcs(%s)", src);

end:
	if (rc) {
		fsl_free(*dst);
		*dst = NULL;
		*dstlen = 0;
	}

	return rc;
}

/*
 * When the terminal is >= 110 columns wide, the commit summary line in the
 * timeline view will take the form:
 *
 *   DATE UUID USERNAME  COMMIT-COMMENT
 *
 * Assuming an 8-character username, this scheme provides 80 characters for the
 * comment, which should be sufficient considering it's suggested good practice
 * to limit commit comment summary lines to a maximum 50 characters, and most
 * plaintext-based conventions suggest not exceeding 72-80 characters.
 *
 * When < 110 columns, the (abbreviated 9-character) UUID will be elided.
 */
static int
write_commit_line(struct fnc_view *view, struct fnc_commit_artifact *commit,
    int max_usrlen)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	struct fnc_colour		*c = NULL;
	wchar_t				*usr_wcstr = NULL, *wcomment = NULL;
	char				*comment0 = NULL, *comment = NULL;
	char				*date = NULL;
	char				*eol = NULL, *pad = NULL, *user = NULL;
	size_t				 i = 0;
	int				 col_pos, ncols_avail, usrlen;
	int				 commentlen, rc = 0;

	/* Trim time component from timestamp for the date field. */
	date = fsl_strdup(commit->timestamp);
	while (!fsl_isspace(date[i++])) {}
	date[i] = '\0';
	col_pos = MIN(view->ncols, ISO8601_DATE_ONLY + 1);
	if (s->colour)
		c = get_colour(&s->colours, FNC_DATE_STR);
	if (c)
		wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
	waddnstr(view->window, date, col_pos);
	if (c)
		wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
	if (col_pos > view->ncols)
		goto end;

	/* If enough columns, write abbreviated commit hash. */
	if (view->ncols >= 110) {
		if (s->colour)
			c = get_colour(&s->colours, FNC_COMMIT_ID);
		if (c)
			wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
		wprintw(view->window, "%.9s ", commit->uuid);
		if (c)
			wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
		col_pos += 10;
		if (col_pos > view->ncols)
			goto end;
	}

	/*
	 * Parse username from emailaddr if needed, and postfix username
	 * with as much whitespace as needed to fill two spaces beyond
	 * the longest username on the screen.
	 */
	user = fsl_strdup(commit->user);
	if (user == NULL)
		goto end;
	if (strpbrk(user, "<@>") != NULL)
		parse_emailaddr_username(&user);
	rc = formatln(&usr_wcstr, &usrlen, user, view->ncols - col_pos,
	    col_pos);
	if (rc)
		goto end;
	if (s->colour)
		c = get_colour(&s->colours, FNC_USER_STR);
	if (c)
		wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
	waddwstr(view->window, usr_wcstr);
	pad = fsl_mprintf("%*c",  max_usrlen - usrlen + 2, ' ');
	waddstr(view->window, pad);
	if (c)
		wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
	col_pos += (max_usrlen + 2);
	if (col_pos > view->ncols)
		goto end;

	/* Only show comment up to the first newline character. */
	comment0 = fsl_strdup(commit->comment);
	comment = comment0;
	if (comment == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
	while (*comment == '\n')
		++comment;
	eol = strchr(comment, '\n');
	if (eol)
		*eol = '\0';
	ncols_avail = view->ncols - col_pos;
	rc = formatln(&wcomment, &commentlen, comment, ncols_avail, col_pos);
	if (rc)
		goto end;
	waddwstr(view->window, wcomment);
	col_pos += commentlen;
	while (col_pos < view->ncols) {
		waddch(view->window, ' ');
		++col_pos;
	}
end:
	fsl_free(date);
	fsl_free(user);
	fsl_free(usr_wcstr);
	fsl_free(pad);
	fsl_free(comment0);
	fsl_free(wcomment);
	return rc;
}

static int
view_input(struct fnc_view **new, int *done, struct fnc_view *view,
    struct view_tailhead *views)
{
	struct fnc_view	*v;
	int		 ch, rc = 0;

	*new = NULL;

	/* Clear search indicator string. */
	if (view->search_status == SEARCH_COMPLETE ||
	    view->search_status == SEARCH_NO_MATCH)
		view->search_status = SEARCH_CONTINUE;

	if (view->searching && view->search_status == SEARCH_WAITING) {
		if ((rc = pthread_mutex_unlock(&fnc_mutex)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_unlock");
		sched_yield();
		if ((rc = pthread_mutex_lock(&fnc_mutex)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_lock");
		rc = view->search_next(view);
		return rc;
	}

	nodelay(stdscr, FALSE);
	/* Allow thread to make progress while waiting for input. */
	if ((rc = pthread_mutex_unlock(&fnc_mutex)))
		return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_unlock");
	ch = wgetch(view->window);
	if ((rc = pthread_mutex_lock(&fnc_mutex)))
		return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_lock");

	if (rec_sigwinch || rec_sigcont) {
		fnc_resizeterm();
		rec_sigwinch = 0;
		rec_sigcont = 0;
		TAILQ_FOREACH(v, views, entries) {
			if ((rc = view_resize(v)))
				return rc;
			if ((rc = v->input(new, v, KEY_RESIZE)))
				return rc;
			if (v->child) {
				if ((rc = view_resize(v->child)))
					return rc;
				rc = v->child->input(new, v->child, KEY_RESIZE);
				if (rc)
					return rc;
			}
		}
	}

	switch (ch) {
	case '\t':
		if (view->child) {
			view->active = false;
			view->child->active = true;
			view->focus_child = true;
		} else if (view->parent) {
			view->active = false;
			view->parent->active = true;
			view->parent->focus_child = false;
		}
		break;
	case KEY_F(1):
	case 'H':
	case '?':
		help(view);
		break;
	case 'q':
		rc = view->input(new, view, ch);
		view->egress = true;
		break;
	case 'f':
		if (view_is_parent(view)) {
			if (view->child == NULL)
				break;
			if (screen_is_split(view->child)) {
				view->active = false;
				view->child->active = true;
				rc = make_fullscreen(view->child);
			} else
				rc = make_splitscreen(view->child);
			if (rc)
				break;
			rc = view->child->input(new, view->child, KEY_RESIZE);
		} else {
			if (screen_is_split(view)) {
				view->parent->active = false;
				view->active = true;
				rc = make_fullscreen(view);
			} else
				rc = make_splitscreen(view);
			if (rc)
				break;
			rc = view->input(new, view, KEY_RESIZE);
		}
		break;
	case '/':
		if (view->search_init)
			view_search_start(view);
		else
			rc = view->input(new, view, ch);
		break;
	case 'N':
	case 'n':
		if (view->started_search && view->search_next) {
			view->searching = (ch == 'n' ?
			    SEARCH_FORWARD : SEARCH_REVERSE);
			view->search_status = SEARCH_WAITING;
			rc = view->search_next(view);
		} else
			rc = view->input(new, view, ch);
		break;
	case KEY_RESIZE:
		break;
	case ERR:
		break;
	case 'Q':
		*done = 1;
		break;
	default:
		rc = view->input(new, view, ch);
		break;
	}

	return rc;
}

static int
help(struct fnc_view *view)
{
	FILE			*help = NULL;
	char			*title = NULL;
	static const char	*keys[][2] = {
	    {""},
	    {""}, /* Global */
	    {"  H,?,F1           ", "  ❬H❭❬?❭❬F1❭      "},
	    {"  k,<Up>           ", "  ❬↑❭❬k❭          "},
	    {"  j,<Down>         ", "  ❬↓❭❬j❭          "},
	    {"  C-b,PgUp         ", "  ❬C-b❭❬PgUp❭     "},
	    {"  C-f,PgDn         ", "  ❬C-f❭❬PgDn❭     "},
	    {"  gg,Home          ", "  ❬gg❭❬Home❭      "},
	    {"  G,End            ", "  ❬G❭❬End❭        "},
	    {"  Tab              ", "  ❬TAB❭           "},
	    {"  c                ", "  ❬c❭             "},
	    {"  f                ", "  ❬f❭             "},
	    {"  /                ", "  ❬/❭             "},
	    {"  n                ", "  ❬n❭             "},
	    {"  N                ", "  ❬N❭             "},
	    {"  q                ", "  ❬q❭             "},
	    {"  Q                ", "  ❬Q❭             "},
	    {""},
	    {""}, /* Timeline */
	    {"  <,,              ", "  ❬<❭❬,❭          "},
	    {"  >,.              ", "  ❬>❭❬.❭          "},
	    {"  Enter,Space      ", "  ❬Enter❭❬Space❭  "},
	    {"  t                ", "  ❬t❭             "},
	    {""},
	    {""}, /* Diff */
	    {"  Space            ", "  ❬Space❭         "},
	    {"  i                ", "  ❬i❭             "},
	    {"  v                ", "  ❬v❭             "},
	    {"  w                ", "  ❬w❭             "},
	    {"  -,_              ", "  ❬-❭❬_❭          "},
	    {"  +,=              ", "  ❬+❭❬=❭          "},
	    {"  C-k,K,<,,        ", "  ❬C-k❭❬K❭❬<❭❬,❭  "},
	    {"  C-j,J,>,.        ", "  ❬C-j❭❬J❭❬>❭❬.❭  "},
	    {""},
	    {""}, /* Tree */
	    {"  l,Enter,<Right>  ", "  ❬→❭❬l❭❬Enter❭   "},
	    {"  h,<BS>,<Left>    ", "  ❬←❭❬h❭❬⌫❭       "},
	    {"  i                ", "  ❬i❭             "},
	    {"  t                ", "  ❬t❭             "},
	    {""},
	    {""}, /* Blame */
	    {"  Space            ", "  ❬Space❭         "},
	    {"  Enter            ", "  ❬Enter❭         "},
	    {"  b                ", "  ❬b❭             "},
	    {"  p                ", "  ❬p❭             "},
	    {"  B                ", "  ❬B❭             "},
	    {""},
	    {""}, /* Branch */
	    {"  Enter,Space      ", "  ❬Enter❭❬Space❭  "},
	    {"  d                ", "  ❬d❭             "},
	    {"  i                ", "  ❬i❭             "},
	    {"  t                ", "  ❬t❭             "},
	    {"  R,<C-l>          ", "  ❬R❭❬C-l❭        "},
	    {""},
	    {""},
	    {0}
	};
	static const char *desc[] = {
	    "",
	    "Global",
	    "Open in-app help",
	    "Move selection cursor or page up one line",
	    "Move selection cursor or page down one line",
	    "Scroll up one page",
	    "Scroll down one page",
	    "Jump to first line or start of the view",
	    "Jump to last line or end of the view",
	    "Switch focus between open views",
	    "Toggle coloured output",
            "Toggle fullscreen",
	    "Open prompt to enter search term (not available in this view)",
	    "Find next line or token matching the current search term",
	    "Find previous line or token matching the current search term",
            "Quit the active view",
	    "Quit the program",
	    "",
	    "Timeline",
	    "Move selection cursor up one commit",
	    "Move selection cursor down one commit",
	    "Open diff view of the selected commit",
	    "Display a tree reflecting the state of the selected commit",
	    "",
	    "Diff",
	    "Scroll down one page of diff output",
	    "Toggle inversion of diff output",
	    "Toggle verbosity of diff output",
	    "Toggle ignore whitespace-only changes in diff",
	    "Decrease the number of context lines",
	    "Increase the number of context lines",
	    "Display diff of next (newer) commit in the timeline",
	    "Display diff of previous (older) commit in the timeline",
	    "",
	    "Tree",
	    "Move into the selected directory",
	    "Return to the parent directory",
	    "Toggle display of file artifact SHA hashes",
	    "Display timeline of all commits modifying the selected entry",
	    "",
	    "Blame",
	    "Scroll down one page",
	    "Display the diff of the commit corresponding to the selected line",
	    "Blame the version of the file found in the selected line's commit",
	    "Blame the version of the file found in the selected line's parent "
	    "commit",
	    "Reload the previous blamed version of the file",
	    "",
	    "Branch",
	    "Display the timeline of the currently selected branch",
	    "Toggle display of the date when the branch last received changes",
	    "Toggle display of the SHA hash that identifies the branch",
	    "Open a tree view of the currently selected branch",
	    "Reload view with all repostory branches and no filters applied",
	    "",
	    "  See fnc(1) for complete list of options and key bindings."
	};
	int	cs, ln, width = 0, rc = 0;

	cs = (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) ? 1 : 0;

	title = fsl_mprintf("%s %s Help\n", fcli_progname(), PRINT_VERSION);
	if (title == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_mprintf");

	help = tmpfile();
	if (help == NULL)
		return RC(FSL_RC_IO, "%s", "tmpfile");

	/*
	 * Format help text, and compute longest line and total number of
	 * lines in text to be displayed to determine pad dimensions.
	 */
	width = fsl_strlen(title);
	for (ln = 0; keys[ln][0]; ++ln) {
		if (keys[ln][1]) {
			width = MAX((fsl_size_t)width,
			    fsl_strlen(keys[ln][cs]) + fsl_strlen(desc[ln]));
		}
		fsl_fprintf(help, "%s%s%c", keys[ln][cs], desc[ln],
		    keys[ln + 1] ? '\n' : 0);
	}
	rewind(help);

	rc = padpopup(view, width, ln, help, title);
	if (fclose(help) == EOF)
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_IO), "%s", "fclose");

	fsl_free(title);
	return rc;
}

/*
 * Create popup pad in which to write the supplied txt string and optional
 * title. The pad is contained within a window that is offset four columns in
 * and two lines down from the parent window.
 */
static int
padpopup(struct fnc_view *view, int width, int height, FILE *txt,
    const char *title)
{
	WINDOW		*win, *content;
	char		*line = NULL;
	ssize_t		 linelen;
	size_t		 linesz;
	int		 ch, cury, end, wy, wx, x0, y0;

	x0 = 4;		/* Number of columns to border window. */
	y0 = 2;		/* Number of lines to border window. */
	cury = 0;
	wx = getmaxx(view->window) - ((x0 + 1) * 2); /* Width of window. */
	wy = getmaxy(view->window) - ((y0 + 1) * 2); /* Height of window */
	ch = ERR;

	if ((win = newwin(wy, wx, y0, x0)) == 0)
		return RC(FSL_RC_ERROR, "%s", "newwin");
	if ((content = newpad(height + 1, width + 1)) == 0) {
		delwin(win);
		return RC(FSL_RC_ERROR, "%s", "newpad");
	}

	doupdate();
	keypad(content, TRUE);

	/* Write text content to pad. */
	if (title)
		centerprint(content, 0, 0, width, title, 0);
	while ((linelen = getline(&line, &linesz, txt)) != -1)
		waddstr(content, line);
	fsl_free(line);

	end = (getcury(content) - (wy - 3));  /* No. lines past end of pad. */
	do {
		switch (ch) {
			case KEY_UP:
			case 'k':
				if (cury > 0)
					--cury;
				break;
			case KEY_DOWN:
			case 'j':
				if (cury < end)
					++cury;
				break;
			case KEY_PPAGE:
			case CTRL('b'):
				if (cury > 0) {
					cury -= wy / 2;
					if (cury < 0)
						cury = 0;
				}
				break;
			case KEY_NPAGE:
			case CTRL('f'):
			case ' ':
				if (cury < end) {
					cury += wy / 2;
					if (cury > end)
						cury = end;
				}
				break;
			case 'g':
				if (!fnc_home(view))
					break;
				/* FALL THROUGH */
			case KEY_HOME:
				cury = 0;
				break;
			case KEY_END:
			case 'G':
				cury = end;
				break;
			case ERR:
			default:
				break;
		}
		werase(win);
		box(win, 0, 0);
		wnoutrefresh(win);
		pnoutrefresh(content, cury, 0, y0 + 1, x0 + 1, wy, wx);
		doupdate();
	} while ((ch = wgetch(content)) != 'q' && ch != KEY_ESCAPE
	    && ch != ERR);

	/* Destroy window. */
	werase(win);
	wrefresh(win);
	delwin(win);
	delwin(content);

	/* Restore fnc window content. */
	touchwin(view->window);
	wnoutrefresh(view->window);
	doupdate();

	return 0;
}

static void
centerprint(WINDOW *win, int starty, int startx, int cols, const char *str,
    chtype colour)
{
	int	x, y;

	if (win == NULL)
		win = stdscr;

	getyx(win, y, x);
	x = startx ? startx : x;
	y = starty ? starty : y;
	if (!cols)
		cols = getmaxx(win);

	x = startx + (cols - fsl_strlen(str)) / 2;
	wattron(win, colour ? colour : A_UNDERLINE);
	mvwprintw(win, y, x, "%s", str);
	wattroff(win, colour ? colour : A_UNDERLINE);
	refresh();
}

static int
tl_input_handler(struct fnc_view **new_view, struct fnc_view *view, int ch)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	struct fnc_view			*diff_view = NULL, *tree_view = NULL;
	int				 rc = 0, start_col = 0;

	switch (ch) {
	case KEY_DOWN:
	case 'j':
	case '.':
	case '>':
		if (s->first_commit_onscreen == NULL)
			break;
		if (s->selected_idx < MIN(view->nlines - 2,
		    s->commits.ncommits - 1))
			++s->selected_idx;
		else if ((rc = timeline_scroll_down(view, 1)))
			break;
		select_commit(s);
		break;
	case KEY_NPAGE:
	case CTRL('f'): {
		struct commit_entry *first;
		if ((first = s->first_commit_onscreen) == NULL)
			break;
		if ((rc = timeline_scroll_down(view, view->nlines - 1)))
			break;
		if (first == s->first_commit_onscreen && s->selected_idx <
		    MIN(view->nlines - 2, s->commits.ncommits - 1))
			/* At bottom of timeline. */
			s->selected_idx = MIN(view->nlines - 2,
			    s->commits.ncommits - 1);
		select_commit(s);
		break;
	}
	case KEY_END:
	case 'G':
		view->search_status = SEARCH_FOR_END;
		view_search_start(view);
		break;
	case 'k':
	case KEY_UP:
	case '<':
	case ',':
		if (s->first_commit_onscreen == NULL)
			break;
		if (s->selected_idx > 0)
			--s->selected_idx;
		else
			timeline_scroll_up(s, 1);
		select_commit(s);
		break;
	case KEY_PPAGE:
	case CTRL('b'):
		if (s->first_commit_onscreen == NULL)
			break;
		if (TAILQ_FIRST(&s->commits.head) == s->first_commit_onscreen)
			s->selected_idx = 0;
		else
			timeline_scroll_up(s, view->nlines - 1);
		select_commit(s);
		break;
	case 'g':
		if (!fnc_home(view))
			break;
		/* FALL THROUGH */
	case KEY_HOME:
		if (s->first_commit_onscreen == NULL)
			break;
		s->selected_idx = 0;
		timeline_scroll_up(s, s->commits.ncommits);
		select_commit(s);
		break;
	case KEY_RESIZE:
		if (s->selected_idx > view->nlines - 2)
			s->selected_idx = view->nlines - 2;
		if (s->selected_idx > s->commits.ncommits - 1)
			s->selected_idx = s->commits.ncommits - 1;
		select_commit(s);
		if (s->commits.ncommits < view->nlines - 1 &&
		    !s->thread_cx.timeline_end) {
			s->thread_cx.ncommits_needed += (view->nlines - 1) -
			    s->commits.ncommits;
			rc = signal_tl_thread(view, 1);
		}
		break;
	case KEY_ENTER:
	case ' ':
	case '\r':
		if (s->selected_commit == NULL)
			break;
		if (view_is_parent(view))
			start_col = view_split_start_col(view->start_col);
		if ((rc = init_diff_commit(&diff_view, start_col,
		    s->selected_commit->commit, view)))
			break;
		view->active = false;
		diff_view->active = true;
		if (view_is_parent(view)) {
			if (view->child != NULL) {
				rc = view_close(view->child);
				view->child = NULL;
			}
			if (rc)
				return rc;
			view->child = diff_view;
			diff_view->parent = view;
			view->focus_child = true;
		} else
			*new_view = diff_view;
		break;
	case 'c':
		s->colour = !s->colour;
		break;
	case 't':
		if (s->selected_commit == NULL)
			break;
		if (!fsl_rid_is_a_checkin(fcli_cx(),
		    s->selected_commit->commit->rid)) {
			wattr_on(view->window, A_BOLD, NULL);
			mvwaddstr(view->window,
			    view->start_ln + view->nlines - 1, 0,
			    "-- tree requires check-in artifact --");
			wclrtoeol(view->window);
			wattr_off(view->window, A_BOLD, NULL);
			fcli_err_reset();
			rc = 0;
			update_panels();
			doupdate();
			sleep(1);
			break;
		}
		if (view_is_parent(view))
			start_col = view_split_start_col(view->start_col);
		rc = browse_commit_tree(&tree_view, start_col,
		    s->selected_commit, s->path);
		if (rc)
			break;
		s->thread_cx.tree_open = true;
		view->active = false;
		tree_view->active = true;
		if (view_is_parent(view)) {
			rc = view_close_child(view);
			if (rc)
				return rc;
			view_set_child(view, tree_view);
			view->focus_child = true;
		} else
			*new_view = tree_view;
		break;
	case 'q':
		s->quit = 1;
		break;
	default:
		break;
	}

	return rc;
}

static int
timeline_scroll_down(struct fnc_view *view, int maxscroll)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	struct commit_entry		*pentry;
	int				 rc = 0, nscrolled = 0, ncommits_needed;

	if (s->last_commit_onscreen == NULL)
		return 0;

	ncommits_needed = s->last_commit_onscreen->idx + 1 + maxscroll;
	if (s->commits.ncommits < ncommits_needed &&
	    !s->thread_cx.timeline_end) {
		/* Signal timeline thread for n commits needed. */
		s->thread_cx.ncommits_needed += maxscroll;
		rc = signal_tl_thread(view, 1);
		if (rc)
			return rc;
	}

	do {
		pentry = TAILQ_NEXT(s->last_commit_onscreen, entries);
		if (pentry == NULL)
			break;

		s->last_commit_onscreen = pentry;

		pentry = TAILQ_NEXT(s->first_commit_onscreen, entries);
		if (pentry == NULL)
			break;
		s->first_commit_onscreen = pentry;
	} while (++nscrolled < maxscroll);

	return rc;
}

static void
timeline_scroll_up(struct fnc_tl_view_state *s, int maxscroll)
{
	struct commit_entry	*entry;
	int			 nscrolled = 0;

	entry = TAILQ_FIRST(&s->commits.head);
	if (s->first_commit_onscreen == entry)
		return;

	entry = s->first_commit_onscreen;
	while (entry && nscrolled < maxscroll) {
		entry = TAILQ_PREV(entry, commit_tailhead, entries);
		if (entry) {
			s->first_commit_onscreen = entry;
			++nscrolled;
		}
	}
}

static void
select_commit(struct fnc_tl_view_state *s)
{
	struct commit_entry	*entry;
	int			 ncommits = 0;

	entry = s->first_commit_onscreen;
	while (entry) {
		if (ncommits == s->selected_idx) {
			s->selected_commit = entry;
			break;
		}
		entry = TAILQ_NEXT(entry, entries);
		++ncommits;
	}
}

static int
make_splitscreen(struct fnc_view *view)
{
	int	 rc = 0;

	view->start_ln = 0;
	view->start_col = view_split_start_col(0);
	view->nlines = LINES;
	view->ncols = COLS - view->start_col;
	view->lines = LINES;
	view->cols = COLS;
	if ((rc = view_resize(view)))
		return rc;

	if (mvwin(view->window, view->start_ln, view->start_col) == ERR)
		return RC(FSL_RC_ERROR, "%s", "mvwin");

	return rc;
}

static int
make_fullscreen(struct fnc_view *view)
{
	int	 rc = 0;

	view->start_col = 0;
	view->start_ln = 0;
	view->nlines = LINES;
	view->ncols = COLS;
	view->lines = LINES;
	view->cols = COLS;
	if ((rc = view_resize(view)))
		return rc;

	if (mvwin(view->window, view->start_ln, view->start_col) == ERR)
		return RC(FSL_RC_ERROR, "%s", "mvwin");

	return rc;
}

/*
 * Only open a new view in a splitscreen if the console is >= 120 columns wide.
 * Otherwise, open in the current view. If splitting the screen, make the new
 * panel the largest of 80 columns or half the current column width.
 */
static int
view_split_start_col(int start_col)
{
	if (start_col > 0 || COLS < 120)
		return 0;
	return (COLS - MAX(COLS / 2, 80));
}

static int
view_search_start(struct fnc_view *view)
{
	char	pattern[BUFSIZ];
	int	retval;
	int	rc = 0;

	if (view->started_search) {
		regfree(&view->regex);
		view->searching = SEARCH_DONE;
		memset(&view->regmatch, 0, sizeof(view->regmatch));
	}
	view->started_search = false;

	if (view->nlines < 1)
		return rc;

	if (view->search_status == SEARCH_FOR_END) {
		view->search_init(view);
		view->started_search = true;
		view->searching = SEARCH_FORWARD;
		view->search_status = SEARCH_WAITING;
		view->state.timeline.thread_cx.endjmp = true;
		rc = view->search_next(view);

		return rc;
	}

	mvwaddstr(view->window, view->start_ln + view->nlines - 1, 0, "/");
	wclrtoeol(view->window);

	nocbreak();
	echo();
	retval = wgetnstr(view->window, pattern, sizeof(pattern));
	cbreak();
	noecho();
	if (retval == ERR)
		return rc;

	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
		if ((rc = view->search_init(view))) {
			regfree(&view->regex);
			return rc;
		}
		view->started_search = true;
		view->searching = SEARCH_FORWARD;
		view->search_status = SEARCH_WAITING;
		rc = view->search_next(view);
	}

	return rc;
}

static int
tl_search_init(struct fnc_view *view)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;

	s->matched_commit = NULL;
	s->search_commit = NULL;
	return 0;
}

static int
tl_search_next(struct fnc_view *view)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	struct commit_entry		*entry;
	int				 rc = 0;

	if (!s->thread_cx.ncommits_needed && view->started_search)
		halfdelay(1);

	/* Show status update in timeline view. */
	show_timeline_view(view);
	update_panels();
	doupdate();

	if (s->search_commit) {
		int	ch;
		if ((rc = pthread_mutex_unlock(&fnc_mutex)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_unlock");
		ch = wgetch(view->window);
		if ((rc = pthread_mutex_lock(&fnc_mutex)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_lock");
		if (ch == KEY_BACKSPACE) {
			view->search_status = SEARCH_CONTINUE;
			return rc;
		}
		if (view->searching == SEARCH_FORWARD)
			entry = TAILQ_NEXT(s->search_commit, entries);
		else
			entry = TAILQ_PREV(s->search_commit, commit_tailhead,
			    entries);
	} else if (s->matched_commit) {
		if (view->searching == SEARCH_FORWARD)
			entry = TAILQ_NEXT(s->matched_commit, entries);
		else
			entry = TAILQ_PREV(s->matched_commit, commit_tailhead,
			    entries);
	} else {
		if (view->searching == SEARCH_FORWARD)
			entry = TAILQ_FIRST(&s->commits.head);
		else
			entry = TAILQ_LAST(&s->commits.head, commit_tailhead);
	}

	while (1) {
		if (entry == NULL) {
			if (s->thread_cx.timeline_end && s->thread_cx.endjmp) {
				s->matched_commit = TAILQ_LAST(&s->commits.head,
				    commit_tailhead);
				view->search_status = SEARCH_COMPLETE;
				s->thread_cx.endjmp = false;
				break;
			}
			if (s->thread_cx.timeline_end || view->searching ==
			    SEARCH_REVERSE) {
				view->search_status = (s->matched_commit ==
				    NULL ?  SEARCH_NO_MATCH : SEARCH_COMPLETE);
				s->search_commit = NULL;
				cbreak();
				return rc;
			}
			/*
			 * Wake the timeline thread to produce more commits.
			 * Search will resume at s->search_commit upon return.
			 */
			++s->thread_cx.ncommits_needed;
			return signal_tl_thread(view, 0);
		}

		if (!s->thread_cx.endjmp && find_commit_match(entry->commit,
		    &view->regex)) {
			view->search_status = SEARCH_CONTINUE;
			s->matched_commit = entry;
			break;
		}

		s->search_commit = entry;
		if (view->searching == SEARCH_FORWARD)
			entry = TAILQ_NEXT(entry, entries);
		else
			entry = TAILQ_PREV(entry, commit_tailhead, entries);
	}

	if (s->matched_commit) {
		int cur = s->selected_commit->idx;
		while (cur < s->matched_commit->idx) {
			if ((rc = tl_input_handler(NULL, view, KEY_DOWN)))
				return rc;
			++cur;
		}
		while (cur > s->matched_commit->idx) {
			if ((rc = tl_input_handler(NULL, view, KEY_UP)))
				return rc;
			--cur;
		}
	}

	s->search_commit = NULL;
	cbreak();

	return rc;
}

static bool
find_commit_match(struct fnc_commit_artifact *commit,
regex_t *regex)
{
	regmatch_t	regmatch;

	if (regexec(regex, commit->user, 1, &regmatch, 0) == 0 ||
	    regexec(regex, (char *)commit->uuid, 1, &regmatch, 0) == 0 ||
	    regexec(regex, commit->comment, 1, &regmatch, 0) == 0 ||
	    (commit->branch && regexec(regex, commit->branch, 1, &regmatch, 0)
	     == 0))
		return true;

	return false;
}

static int
view_close(struct fnc_view *view)
{
        int	rc = 0;

	if (view->child) {
		view_close(view->child);
		view->child = NULL;
	}
	if (view->close)
		rc = view->close(view);
	if (view->panel)
		del_panel(view->panel);
	if (view->window)
		delwin(view->window);
	free(view);

	return rc;
}

static int
close_timeline_view(struct fnc_view *view)
{
	struct fnc_tl_view_state	*s = &view->state.timeline;
	struct fsl_list_state		 st = { FNC_COLOUR_OBJ };
	int				 rc = 0;

	rc = join_tl_thread(s);
	fsl_stmt_finalize(s->thread_cx.q);
	fnc_free_commits(&s->commits);
	fsl_list_clear(&s->colours, fsl_list_object_free, &st);
	regfree(&view->regex);
	fsl_free(s->path);
	s->path = NULL;

	return rc;
}

/* static void */
/* sspinner(void) */
/* { */
/* 	int idx; */

/* 	while (1) { */
/* 		for (idx = 0; idx < 4; ++idx) { */
/* 			printf("\b%c", "|/-\\"[idx]); */
/* 			fflush(stdout); */
/* 			ssleep(SPIN_INTERVAL); */
/* 		} */
/* 	} */
/* } */

static int
join_tl_thread(struct fnc_tl_view_state *s)
{
	void	*err;
	int	 rc = 0;

	if (s->thread_id) {
		s->quit = 1;

		if ((rc = pthread_cond_signal(&s->thread_cx.commit_consumer)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_MISUSE),
			    "%s", "pthread_cond_signal");
		if ((rc = pthread_mutex_unlock(&fnc_mutex)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_unlock");
		if ((rc = pthread_join(s->thread_id, &err)) ||
		    err == PTHREAD_CANCELED)
			return RC(fsl_errno_to_rc(rc, FSL_RC_MISUSE),
			    "%s", "pthread_join");
		if ((rc = pthread_mutex_lock(&fnc_mutex)))
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_lock");

		s->thread_id = 0;
	}

	if ((rc = pthread_cond_destroy(&s->thread_cx.commit_consumer)))
		RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_cond_destroy");

	if ((rc = pthread_cond_destroy(&s->thread_cx.commit_producer)))
		RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_cond_destroy");

	return rc;
}

static void
fnc_free_commits(struct commit_queue *commits)
{
	while (!TAILQ_EMPTY(&commits->head)) {
		struct commit_entry	*entry;

		entry = TAILQ_FIRST(&commits->head);
		TAILQ_REMOVE(&commits->head, entry, entries);
		fnc_commit_artifact_close(entry->commit);
		free(entry);
		--commits->ncommits;
	}
}

static void
fnc_commit_artifact_close(struct fnc_commit_artifact *commit)
{
	struct fsl_list_state	st = { FNC_ARTIFACT_OBJ };

	if (commit->branch)
		fsl_free(commit->branch);
	if (commit->comment)
		fsl_free(commit->comment);
	if (commit->timestamp)
		fsl_free(commit->timestamp);
	if (commit->type)
		fsl_free(commit->type);
	if (commit->user)
		fsl_free(commit->user);
	fsl_free(commit->uuid);
	fsl_free(commit->puuid);
	fsl_list_clear(&commit->changeset, fsl_list_object_free, &st);
	fsl_list_reserve(&commit->changeset, 0);
	fsl_free(commit);
}

static int
fsl_list_object_free(void *elem, void *state)
{
	struct fsl_list_state *st = state;

	switch (st->obj) {
	case FNC_ARTIFACT_OBJ: {
		struct fsl_file_artifact *ffa = elem;
		fsl_free(ffa->fc->name);
		fsl_free(ffa->fc->uuid);
		fsl_free(ffa->fc->priorName);
		fsl_free(ffa->fc);
		fsl_free(ffa);
		break;
	}
	case FNC_COLOUR_OBJ: {
		struct fnc_colour *c = elem;
		regfree(&c->regex);
		fsl_free(c);
		break;
	}
	default:
		return RC(FSL_RC_MISSING_INFO,
		    "fsl_list_state.obj missing or invalid: %d", st->obj);
	}

	return 0;
}

static int
init_diff_commit(struct fnc_view **new_view, int start_col,
    struct fnc_commit_artifact *commit, struct fnc_view *timeline_view)
{
	struct fnc_view			*diff_view;
	int				 rc = 0;

	diff_view = view_open(0, 0, 0, start_col, FNC_VIEW_DIFF);
	if (diff_view == NULL)
		return RC(FSL_RC_ERROR, "%s", "view_open");

	rc = open_diff_view(diff_view, commit, DIFF_DEF_CTXT, fnc_init.ws,
	    fnc_init.invert, !fnc_init.quiet, timeline_view, true, NULL);
	if (!rc)
		*new_view = diff_view;

	return rc;
}

static int
open_diff_view(struct fnc_view *view, struct fnc_commit_artifact *commit,
    int context, bool ignore_ws, bool invert, bool verbosity,
    struct fnc_view *timeline_view, bool showmeta,
    struct fnc_pathlist_head *paths)
{
	struct fnc_diff_view_state	*s = &view->state.diff;
	int				 rc = 0;

	s->paths = paths;
	s->selected_commit = commit;
	s->first_line_onscreen = 1;
	s->last_line_onscreen = view->nlines;
	s->current_line = 1;
	s->f = NULL;
	s->context = context;
	s->sbs = 0;
	verbosity ? s->diff_flags |= FSL_DIFF_VERBOSE : 0;
	ignore_ws ? s->diff_flags |= FSL_DIFF_IGNORE_ALLWS : 0;
	invert ? s->diff_flags |= FSL_DIFF_INVERT : 0;
	s->timeline_view = timeline_view;
	s->colours = fsl_list_empty;
	s->colour = !fnc_init.nocolour && has_colors();
	s->showmeta = showmeta;

	if (s->colour)
		set_colours(&s->colours, FNC_VIEW_DIFF);
	if (timeline_view && screen_is_split(view))
		show_timeline_view(timeline_view); /* draw vborder */
	show_diff_status(view);

	s->line_offsets = NULL;
	s->nlines = 0;
	s->ncols = view->ncols;
	rc = create_diff(s);
	if (rc) {
		if (s->colour) {
			struct fsl_list_state st = { FNC_COLOUR_OBJ };
			fsl_list_clear(&s->colours, fsl_list_object_free, &st);
		}
		return rc;
	}

	view->show = show_diff;
	view->input = diff_input_handler;
	view->close = close_diff_view;
	view->search_init = diff_search_init;
	view->search_next = diff_search_next;

	return rc;
}

static void
show_diff_status(struct fnc_view *view)
{
	mvwaddstr(view->window, 0, 0, "generating diff...");
#ifdef __linux__
	wnoutrefresh(view->window);
#else
	update_panels();
#endif
	doupdate();
}

static int
create_diff(struct fnc_diff_view_state *s)
{
	FILE	*fout = NULL;
	char	*line, *st0 = NULL, *st = NULL;
	off_t	 lnoff = 0;
	int	 n, rc = 0;

	free(s->line_offsets);
	s->line_offsets = fsl_malloc(sizeof(off_t));
	if (s->line_offsets == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_malloc");
	s->nlines = 0;

	fout = tmpfile();
	if (fout == NULL) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_IO), "%s", "tmpfile");
		goto end;
	}
	if (s->f && fclose(s->f) == EOF) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_IO), "%s", "fclose");
		goto end;
	}
	s->f = fout;

	/*
	 * We'll diff artifacts of type "ci" (i.e., "checkin") separately, as
	 * it's a different process to diff the others (wiki, technote, etc.).
	 */
	if (s->selected_commit->diff_type == FNC_DIFF_COMMIT)
		rc = create_changeset(s->selected_commit);
	else if (s->selected_commit->diff_type == FNC_DIFF_BLOB)
		rc = diff_file_artifact(&s->buf, s->selected_commit->prid, NULL,
		    s->selected_commit->rid, NULL, FSL_CKOUT_CHANGE_MOD,
		    s->diff_flags, s->context, s->sbs,
		    s->selected_commit->diff_type);
	else if (s->selected_commit->diff_type == FNC_DIFF_WIKI)
		rc = diff_non_checkin(&s->buf, s->selected_commit,
		    s->diff_flags, s->context, s->sbs);
	if (rc)
		goto end;

	/*
	 * Delay assigning diff headline labels (i.e., diff id1 id2) till now
	 * because wiki parent commits are obtained in diff_non_checkin().
	 */
	if (s->selected_commit->puuid) {
		s->id1 = fsl_strdup(s->selected_commit->puuid);
		if (s->id1 == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
	} else
		s->id1 = NULL;	/* Initial commit, tag, technote, etc. */
	if (s->selected_commit->uuid) {
		s->id2 = fsl_strdup(s->selected_commit->uuid);
		if (s->id2 == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
	} else
		s->id2 = NULL;	/* Local work tree. */

	rc = add_line_offset(&s->line_offsets, &s->nlines, 0);
	if (rc)
		goto end;

	if (s->showmeta)
		write_commit_meta(s);

	/*
	 * Diff local changes on disk in the current checkout differently to
	 * checked-in versions: the former compares on disk file content with
	 * file artifacts; the latter compares file artifact blobs only.
	 */
	if (s->selected_commit->diff_type == FNC_DIFF_COMMIT)
		diff_commit(&s->buf, s->selected_commit, s->diff_flags,
		    s->context, s->sbs, s->paths);
	else if (s->selected_commit->diff_type == FNC_DIFF_CKOUT)
		diff_checkout(&s->buf, s->selected_commit->prid, s->diff_flags,
		    s->context, s->sbs, s->paths);

	/*
	 * Parse the diff buffer line-by-line to record byte offsets of each
	 * line for scrolling and searching in diff view.
	 */
	st0 = fsl_strdup(fsl_buffer_str(&s->buf));
	st = st0;
	lnoff = (s->line_offsets)[s->nlines - 1];
	while ((line = fnc_strsep(&st, "\n")) != NULL) {
		n = fprintf(s->f, "%s\n", line);
		lnoff += n;
		rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff);
		if (rc)
			goto end;
	}

	fputc('\n', s->f);
	++lnoff;
	rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff);
	if (rc)
		goto end;

end:
	free(st0);
	fsl_buffer_clear(&s->buf);
	if (s->f && fflush(s->f) != 0 && rc == 0)
		rc = RC(FSL_RC_IO, "%s", "fflush");
	return rc;
}

static int
create_changeset(struct fnc_commit_artifact *commit)
{
	fsl_cx		*f = fcli_cx();
	fsl_stmt	*st = NULL;
	fsl_list	 changeset = fsl_list_empty;
	int		 rc = 0;

	st = fsl_stmt_malloc();
	rc = fsl_cx_prepare(f, st,
	    "SELECT name, mperm, "
	    "(SELECT uuid FROM blob WHERE rid=mlink.pid), "
	    "(SELECT uuid FROM blob WHERE rid=mlink.fid), "
	    "(SELECT name FROM filename WHERE filename.fnid=mlink.pfnid) "
	    "FROM mlink JOIN filename ON filename.fnid=mlink.fnid "
	    "WHERE mlink.mid=%d AND NOT mlink.isaux "
	    "AND (mlink.fid > 0 "
	    "OR mlink.fnid NOT IN (SELECT pfnid FROM mlink WHERE mid=%d)) "
	    "ORDER BY name", commit->rid, commit->rid);
	if (rc)
		return RC(FSL_RC_DB, "%s", "fsl_cx_prepare");

	while ((rc = fsl_stmt_step(st)) == FSL_RC_STEP_ROW) {
		struct fsl_file_artifact *fdiff = NULL;
		const char *path, *oldpath, *olduuid, *uuid;
		/* TODO: Parse file mode to display in commit changeset. */
		/* int perm; */

		path = fsl_stmt_g_text(st, 0, NULL);	/* Current filename. */
		//perm = fsl_stmt_g_int32(st, 1);	/* File permissions. */
		olduuid = fsl_stmt_g_text(st, 2, NULL);	/* UUID before change */
		uuid = fsl_stmt_g_text(st, 3, NULL);	/* UUID after change. */
		oldpath = fsl_stmt_g_text(st, 4, NULL);	/* Old name, if chngd */

		fdiff = fsl_malloc(sizeof(struct fsl_file_artifact));
		fdiff->fc = fsl_malloc(sizeof(fsl_card_F));
		*fdiff->fc = fsl_card_F_empty;
		fdiff->fc->name = fsl_strdup(path);
		if (!uuid) {
			fdiff->fc->uuid = fsl_strdup(olduuid);
			fdiff->change = FSL_CKOUT_CHANGE_REMOVED;
		} else if (!olduuid) {
			fdiff->fc->uuid = fsl_strdup(uuid);
			fdiff->change = FSL_CKOUT_CHANGE_ADDED;
		} else if (oldpath) {
			fdiff->fc->uuid = fsl_strdup(uuid);
			fdiff->fc->priorName = fsl_strdup(oldpath);
			fdiff->change = FSL_CKOUT_CHANGE_RENAMED;
		} else {
			fdiff->fc->uuid = fsl_strdup(uuid);
			fdiff->change = FSL_CKOUT_CHANGE_MOD;
		}
		fsl_list_append(&changeset, fdiff);
	}

	commit->changeset = changeset;
	fsl_stmt_finalize(st);

	if (rc == FSL_RC_STEP_DONE)
		rc = 0;

	return rc;
}

static int
write_commit_meta(struct fnc_diff_view_state *s)
{
	char		*line = NULL, *st0 = NULL, *st = NULL;
	fsl_size_t	 linelen, idx = 0;
	off_t		 lnoff = 0;
	int		 n, rc = 0;

	if ((n = fprintf(s->f,"%s %s\n", s->selected_commit->type,
	    s->selected_commit->uuid)) < 0)
		goto end;
	lnoff += n;
	if ((rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff)))
		goto end;

	if ((n = fprintf(s->f,"user: %s\n", s->selected_commit->user)) < 0)
		goto end;
	lnoff += n;
	if ((rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff)))
		goto end;

	if ((n = fprintf(s->f,"tags: %s\n", s->selected_commit->branch ?
	    s->selected_commit->branch : "/dev/null")) < 0)
		goto end;
	lnoff += n;
	if ((rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff)))
		goto end;

	if ((n = fprintf(s->f,"date: %s\n",
	    s->selected_commit->timestamp)) < 0)
		goto end;
	lnoff += n;
	if ((rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff)))
		goto end;

	fputc('\n', s->f);
	++lnoff;
	if ((rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff)))
		goto end;

	st0 = fsl_strdup(s->selected_commit->comment);
	st = st0;
	if (st == NULL) {
		RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		goto end;
	}
	while ((line = fnc_strsep(&st, "\n")) != NULL) {
		linelen = fsl_strlen(line);
		if (linelen >= s->ncols) {
			rc = wrapline(line, s->ncols, s, &lnoff);
			if (rc)
				goto end;
		}
		else {
			if ((n = fprintf(s->f, "%s\n", line)) < 0)
				goto end;
			lnoff += n;
			if ((rc = add_line_offset(&s->line_offsets, &s->nlines,
			    lnoff)))
				goto end;

		}
	}

	fputc('\n', s->f);
	++lnoff;
	if ((rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff)))
		goto end;

	for (idx = 0; idx < s->selected_commit->changeset.used; ++idx) {
		char				*changeline;
		struct fsl_file_artifact	*file_change;

		file_change = s->selected_commit->changeset.list[idx];

		switch (file_change->change) {
		case FSL_CKOUT_CHANGE_MOD:
			changeline = "[~] ";
			break;
		case FSL_CKOUT_CHANGE_ADDED:
			changeline = "[+] ";
			break;
		case FSL_CKOUT_CHANGE_RENAMED:
			changeline = fsl_mprintf("[>] %s -> ",
			   file_change->fc->priorName);
			break;
		case FSL_CKOUT_CHANGE_REMOVED:
			changeline = "[-] ";
			break;
		default:
			changeline = "[!] ";
			break;
		}
		if ((n = fprintf(s->f, "%s%s\n", changeline,
		    file_change->fc->name)) < 0)
			goto end;
		lnoff += n;
		if ((rc = add_line_offset(&s->line_offsets, &s->nlines, lnoff)))
			goto end;
	}

end:
	free(st0);
	free(line);
	if (rc) {
		free(*&s->line_offsets);
		s->line_offsets = NULL;
		s->nlines = 0;
	}
	return rc;
}

/*
 * Wrap long lines at the terminal's available column width. The caller
 * must ensure the ncols_avail parameter has taken into account whether the
 * screen is currently split, and not mistakenly pass in the curses COLS macro
 * without deducting the parent panel's width. This function doesn't break
 * words, and will wrap at the end of the last word that can wholly fit within
 * the ncols_avail limit.
 */
static int
wrapline(char *line, fsl_size_t ncols_avail, struct fnc_diff_view_state *s,
    off_t *lnoff)
{
	char		*word;
	fsl_size_t	 wordlen, cursor = 0;
	int		 n = 0, rc = 0;

	while ((word = fnc_strsep(&line, " ")) != NULL) {
		wordlen = fsl_strlen(word);
		if ((cursor + wordlen) >= ncols_avail) {
			fputc('\n', s->f);
			++(*lnoff);
			rc = add_line_offset(&s->line_offsets, &s->nlines,
			    *lnoff);
			if (rc)
				return rc;
			cursor = 0;
		}
		if ((n  = fprintf(s->f, "%s ", word)) < 0)
			return rc;
		*lnoff += n;
		cursor += n;
	}
	fputc('\n', s->f);
	++(*lnoff);
	if ((rc = add_line_offset(&s->line_offsets, &s->nlines, *lnoff)))
		return rc;

	return 0;
}

static int
add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
{
	off_t	*p;

	p = fsl_realloc(*line_offsets, (*nlines + 1) * sizeof(off_t));
	if (p == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_realloc");
	*line_offsets = p;
	(*line_offsets)[*nlines] = off;
	(*nlines)++;

	return 0;
}

/*
 * Fill the buffer with the differences between commit->uuid and commit->puuid.
 * commit->rid (to load into deck d2) is the *this* version, and commit->puuid
 * (to be loaded into deck d1) is the version we diff against. Step through the
 * deck of F(ile) cards from both versions to determine: (1) if we have new
 * files added (i.e., no F card counterpart in d1); (2) files deleted (i.e., no
 * F card counterpart in d2); (3) or otherwise the same file (i.e., F card
 * exists in both d1 and d2). In cases (1) and (2), we call diff_file_artifact()
 * to dump the complete content of the added/deleted file if FSL_DIFF_VERBOSE is
 * set, otherwise only diff metatadata will be output. In case (3), if the
 * hash (UUID) of each F card is the same, there are no changes; if different,
 * both artifacts will be passed to diff_file_artifact() to be diffed.
 */
static int
diff_commit(fsl_buffer *buf, struct fnc_commit_artifact *commit, int diff_flags,
    int context, int sbs, struct fnc_pathlist_head *paths)
{
	fsl_cx			*f = fcli_cx();
	const fsl_card_F	*fc1 = NULL;
	const fsl_card_F	*fc2 = NULL;
	fsl_deck		 d1 = fsl_deck_empty;
	fsl_deck		 d2 = fsl_deck_empty;
	fsl_id_t		 id1;
	int			 different = 0, rc = 0;

	rc = fsl_deck_load_rid(f, &d2, commit->rid, FSL_SATYPE_CHECKIN);
	if (rc)
		goto end;
	rc = fsl_deck_F_rewind(&d2);
	if (rc)
		goto end;

	/*
	 * For the one-and-only special case of repositories, such as the
	 * canonical fnc, that do not have an "initial empty check-in", we
	 * proceed with no parent version to diff against.
	 */
	if (commit->puuid) {
		rc = fsl_sym_to_rid(f, commit->puuid, FSL_SATYPE_CHECKIN, &id1);
		if (rc)
			goto end;
		rc = fsl_deck_load_rid(f, &d1, id1, FSL_SATYPE_CHECKIN);
		if (rc)
			goto end;
		rc = fsl_deck_F_rewind(&d1);
		if (rc)
			goto end;
		fsl_deck_F_next(&d1, &fc1);
	}

	fsl_deck_F_next(&d2, &fc2);
	while (fc1 || fc2) {
		const fsl_card_F	*a = NULL, *b = NULL;
		fsl_ckout_change_e	 change = FSL_CKOUT_CHANGE_NONE;
		bool			 diff = true;

		if (paths != NULL && !TAILQ_EMPTY(paths)) {
			struct fnc_pathlist_entry *pe;
			diff = false;
			TAILQ_FOREACH(pe, paths, entry)
				if (!fsl_strcmp(pe->path, fc1->name) ||
				    !fsl_strcmp(pe->path, fc2->name) ||
				    !fsl_strncmp(pe->path, fc1->name,
				    pe->pathlen) || !fsl_strncmp(pe->path,
				    fc2->name, pe->pathlen)) {
					diff = true;
					break;
				}
		}

		if (!fc1)	/* File added. */
			different = 1;
		else if (!fc2)	/* File deleted. */
			different = -1;
		else		/* Same filename in both versions. */
			different = fsl_strcmp(fc1->name, fc2->name);

		if (different) {
			if (different > 0) {
				b = fc2;
				change = FSL_CKOUT_CHANGE_ADDED;
				fsl_deck_F_next(&d2, &fc2);
			} else if (different < 0) {
				a = fc1;
				change = FSL_CKOUT_CHANGE_REMOVED;
				fsl_deck_F_next(&d1, &fc1);
			}
			if (diff)
				rc = diff_file_artifact(buf, id1, a,
				    commit->rid, b, change, diff_flags,
				    context, sbs, commit->diff_type);
		} else if (!fsl_uuidcmp(fc1->uuid, fc2->uuid)) { /* No change */
			fsl_deck_F_next(&d1, &fc1);
			fsl_deck_F_next(&d2, &fc2);
		} else {
			change = FSL_CKOUT_CHANGE_MOD;
			if (diff)
				rc = diff_file_artifact(buf, id1, fc1,
				    commit->rid, fc2, change, diff_flags,
				    context, sbs, commit->diff_type);
			fsl_deck_F_next(&d1, &fc1);
			fsl_deck_F_next(&d2, &fc2);
		}
		if (rc == FSL_RC_RANGE) {
			fsl_buffer_append(buf,
			    "\nDiff has too many changes\n", -1);
			rc = 0;
			fsl_cx_err_reset(f);
		} else if (rc == FSL_RC_DIFF_BINARY) {
			fsl_buffer_append(buf,
			    "\nBinary files cannot be diffed\n", -1);
			rc = 0;
			fsl_cx_err_reset(f);
		} else if (rc)
			goto end;
	}
end:
	fsl_deck_finalize(&d1);
	fsl_deck_finalize(&d2);
	return rc;
}

/*
 * Diff local changes on disk in the current checkout against either a previous
 * commit or, if no version has been supplied, the current checkout.
 *   buf  output buffer in which diff content is appended
 *   vid  repository database record id of the version to diff against
 * diff_flags, context, and sbs are the same parameters as diff_file_artifact()
 * nb. This routine is only called with 'fnc diff [hash]'; that is, one or
 * zero args—not two—supplied to fnc's diff command line interface.
 */
static int
diff_checkout(fsl_buffer *buf, fsl_id_t vid, int diff_flags, int context,
    int sbs, struct fnc_pathlist_head *paths)
{
	fsl_cx		*f = fcli_cx();
	fsl_stmt	*st = NULL;
	fsl_buffer	 sql, abspath, bminus;
	fsl_uuid_str	 xminus = NULL;
	fsl_id_t	 cid;
	int		 rc = 0;
	bool		 allow_symlinks;

	abspath = bminus = sql = fsl_buffer_empty;
	fsl_ckout_version_info(f, &cid, NULL);
	/* cid = fsl_config_get_id(f, FSL_CONFDB_CKOUT, 0, "checkout"); */
	/* XXX Already done in cmd_diff(): Load vfile table with local state. */
	/* rc = fsl_vfile_changes_scan(f, cid, */
	/*     FSL_VFILE_CKSIG_ENOTFILE & FSL_VFILE_CKSIG_KEEP_OTHERS); */
	/* if (rc) */
	/*	return RC(rc, "%s", "fsl_vfile_changes_scan"); */

	/*
	 * If a previous version is supplied, load its vfile state to query
	 * changes. Otherwise query the current checkout state for changes.
	 */
	if (vid != cid) {
		/* Keep vfile ckout state; but unload vid when finished. */
		rc = fsl_vfile_load(f, vid, false, NULL);
		if (rc)
			goto unload;
		fsl_buffer_appendf(&sql, "SELECT v2.pathname, v2.deleted, "
		    "v2.chnged, v2.rid == 0, v1.rid, v1.islink"
		    " FROM vfile v1, vfile v2"
		    " WHERE v1.pathname=v2.pathname AND v1.vid=%d AND v2.vid=%d"
		    " AND (v2.deleted OR v2.chnged OR v1.mrid != v2.rid)"
		    " UNION "
		    "SELECT pathname, 1, 0, 0, 0, islink"
		    " FROM vfile v1"
		    " WHERE v1.vid = %d"
		    " AND NOT EXISTS(SELECT 1 FROM vfile v2"
		    " WHERE v2.vid = %d AND v2.pathname = v1.pathname)"
		    " UNION "
		    "SELECT pathname, 0, 0, 1, 0, islink"
		    " FROM vfile v2"
		    " WHERE v2.vid = %d"
		    " AND NOT EXISTS(SELECT 1 FROM vfile v1"
		    " WHERE v1.vid = %d AND v1.pathname = v2.pathname)"
		    " ORDER BY 1", vid, cid, vid, cid, cid, vid);
	} else {
		fsl_buffer_appendf(&sql, "SELECT pathname, deleted, chnged, "
		    "rid == 0, rid, islink"
		    " FROM vfile"
		    " WHERE vid = %d"
		    " AND (deleted OR chnged OR rid == 0)"
		    " ORDER BY pathname", cid);
	}
	st = fsl_stmt_malloc();
	rc = fsl_cx_prepare(f, st, "%b", &sql);
	if (rc) {
		rc = RC(rc, "%s", "fsl_cx_prepare");
		goto yield;
	}

	while ((rc = fsl_stmt_step(st)) == FSL_RC_STEP_ROW) {
		const char	*path;
		int		 deleted, changed, added, fid, symlink;
		enum		 fsl_ckout_change_e change;
		bool		 diff = true;

		path = fsl_stmt_g_text(st, 0, NULL);
		deleted = fsl_stmt_g_int32(st, 1);
		changed = fsl_stmt_g_int32(st, 2);
		added = fsl_stmt_g_int32(st, 3);
		fid = fsl_stmt_g_int32(st, 4);
		symlink = fsl_stmt_g_int32(st, 5);
		rc = fsl_file_canonical_name2(f->ckout.dir, path, &abspath,
		    false);
		if (rc)
			goto yield;

		if (deleted)
			change = FSL_CKOUT_CHANGE_REMOVED;
		else if (fsl_file_access(fsl_buffer_cstr(&abspath), F_OK))
			change = FSL_CKOUT_CHANGE_MISSING;
		else if (added) {
			fid = 0;
			change = FSL_CKOUT_CHANGE_ADDED;
		} else if (changed == 3) {
			fid = 0;
			change = FSL_CKOUT_CHANGE_MERGE_ADD;
		} else if (changed == 5) {
			fid = 0;
			change = FSL_CKOUT_CHANGE_INTEGRATE_ADD;
		} else
			change = FSL_CKOUT_CHANGE_MOD;

		/*
		 * For changed files of which this checkout is already aware,
		 * grab their hash to make comparisons. For removed files, if
		 * diffing against a version other than the current checkout,
		 * load the version's manifest to parse for known versions of
		 * said files. If we don't, we risk diffing stale or bogus
		 * content. Known cases include MISSING, DELETED, and RENAMED
		 * files, which fossil(1) misses in some instances.
		 */
		if (fid > 0)
			xminus = fsl_rid_to_uuid(f, fid);
		else if (vid != cid && !added) {
			fsl_deck		 d = fsl_deck_empty;
			const fsl_card_F	*cf = NULL;

			rc = fsl_deck_load_rid(f, &d, vid, FSL_SATYPE_CHECKIN);
			if (!rc)
				rc = fsl_deck_F_rewind(&d);
			if (rc)
				goto yield;
			do {
				fsl_deck_F_next(&d, &cf);
				if (cf && !fsl_strcmp(cf->name, path)) {
					xminus = fsl_strdup(cf->uuid);
					if (xminus == NULL) {
						RC(FSL_RC_ERROR, "%s",
						    "fsl_strdup");
						goto yield;
					}
					fid = fsl_uuid_to_rid(f, xminus);
					break;
				}
			} while (cf);
			fsl_deck_finalize(&d);
		}
		if (!xminus)
			xminus = fsl_strdup(NULL_DEVICE);
		allow_symlinks = fsl_config_get_bool(f, FSL_CONFDB_REPO, false,
		    "allow-symlinks");
		if (!symlink != !(fsl_is_symlink(fsl_buffer_cstr(&abspath)) &&
		    allow_symlinks)) {
			rc = write_diff_meta(buf, path, xminus, path,
			    NULL_DEVICE, diff_flags, change);
			fsl_buffer_append(buf, "\nSymbolic links and regular "
			    "files cannot be diffed\n", -1);
			if (rc)
				goto yield;
			continue;
		}
		if (fid > 0 && change != FSL_CKOUT_CHANGE_ADDED) {
			rc = fsl_content_get(f, fid, &bminus);
			if (rc)
				goto yield;
		} else
			fsl_buffer_clear(&bminus);
		if (paths != NULL && !TAILQ_EMPTY(paths)) {
			struct fnc_pathlist_entry *pe;
			diff = false;
			TAILQ_FOREACH(pe, paths, entry)
				if (!fsl_strncmp(pe->path, path, pe->pathlen)
				    || !fsl_strcmp(pe->path, path)) {
					diff = true;
					break;
				}
		}
		if (diff)
			rc = diff_file(buf, &bminus, path, xminus,
			    fsl_buffer_cstr(&abspath), change, diff_flags,
			    context, sbs);
		fsl_buffer_reuse(&bminus);
		fsl_buffer_reuse(&abspath);
		fsl_free(xminus);
		xminus = NULL;
		if (rc == FSL_RC_RANGE) {
			fsl_buffer_append(buf,
			    "\nDiff has too many changes\n", -1);
			rc = 0;
			fsl_cx_err_reset(f);
		} else if (rc == FSL_RC_DIFF_BINARY) {
			fsl_buffer_append(buf,
			    "\nBinary files cannot be diffed\n", -1);
			rc = 0;
			fsl_cx_err_reset(f);
		} else if (rc)
			goto yield;
	}

yield:
	fsl_stmt_finalize(st);
	fsl_free(xminus);
unload:
	fsl_vfile_unload_except(f, cid);
	fsl_buffer_clear(&abspath);
	fsl_buffer_clear(&bminus);
	fsl_buffer_clear(&sql);
	return rc;
}

/*
 * Write diff index line and file metadata (i.e., file paths and hashes), which
 * signify file addition, removal, or modification.
 *   buf         output buffer in which diff output will be appended
 *   zminus      file name of the file being diffed against
 *   xminus      hex hash of file named zminus
 *   zplus       file name of the file being diffed
 *   xplus       hex hash of the file named zplus
 *   diff_flags  bitwise flags to control the diff
 *   change      enum denoting the versioning change of the file
 */
static int
write_diff_meta(fsl_buffer *buf, const char *zminus, fsl_uuid_str xminus,
    const char *zplus, fsl_uuid_str xplus, int diff_flags,
    enum fsl_ckout_change_e change)
{
	int	rc = 0;
	const char	*index, *plus, *minus;

	index = zplus ? zplus : (zminus ? zminus : NULL_DEVICE);

	switch (change) {
	case FSL_CKOUT_CHANGE_MERGE_ADD:
		/* FALL THROUGH */
	case FSL_CKOUT_CHANGE_INTEGRATE_ADD:
		/* FALL THROUGH */
	case FSL_CKOUT_CHANGE_ADDED:
		minus = NULL_DEVICE;
		plus = xplus;
		zminus = NULL_DEVICE;
		break;
	case FSL_CKOUT_CHANGE_MISSING:
		/* FALL THROUGH */
	case FSL_CKOUT_CHANGE_REMOVED:
		minus = xminus;
		plus = NULL_DEVICE;
		zplus = NULL_DEVICE;
		break;
	case FSL_CKOUT_CHANGE_RENAMED:
		/* FALL THROUGH */
	case FSL_CKOUT_CHANGE_MOD:
		/* FALL THROUGH */
	default:
		minus = xminus;
		plus = xplus;
		break;
	}

	if (diff_flags & FSL_DIFF_INVERT) {
		const char *tmp = minus;
		minus = plus;
		plus = tmp;
		tmp = zminus;
		zminus = zplus;
		zplus = tmp;
	}

	if ((diff_flags & (FSL_DIFF_SIDEBYSIDE | FSL_DIFF_BRIEF)) == 0) {
		rc = fsl_buffer_appendf(buf, "\nIndex: %s\n%.71c\n", index, '=');
		if (!rc)
			rc = fsl_buffer_appendf(buf, "hash - %s\nhash + %s\n",
			    minus, plus);
	}
	if (!rc && (diff_flags & FSL_DIFF_BRIEF) == 0)
		rc = fsl_buffer_appendf(buf, "--- %s\n+++ %s\n", zminus, zplus);

	return rc;
}

/*
 * The diff_file_artifact() counterpart that diffs actual files on disk rather
 * than file artifacts in the Fossil repository's blob table.
 *   buf      output buffer in which diff output will be appended
 *   bminus   blob containing content of the versioned file being diffed against
 *   zminus   filename of bminus
 *   xminus   hex UUID containing the SHA{1,3} hash of the file named zminus
 *   abspath  absolute path to the file on disk being diffed
 *   change   enum denoting the versioning change of the file
 * diff_flags, context, and sbs are the same parameters as diff_file_artifact()
 */
static int
diff_file(fsl_buffer *buf, fsl_buffer *bminus, const char *zminus,
    fsl_uuid_str xminus, const char *abspath, enum fsl_ckout_change_e change,
    int diff_flags, int context, bool sbs)
{
	fsl_cx		*f = fcli_cx();
	fsl_buffer	 bplus = fsl_buffer_empty;
	fsl_buffer	 xplus = fsl_buffer_empty;
	const char	*zplus = NULL;
	int		 rc = 0;
	bool		 verbose;

	/*
	 * If it exists, read content of abspath to diff EXCEPT for the content
	 * of 'fossil rm FILE' files because they will either: (1) have the same
	 * content as the versioned file's blob in bminus or (2) have changes.
	 * As a result, the upcoming call to fsl_diff_text_to_buffer() _will_
	 * (1) produce an empty diff or (2) show the differences; neither are
	 * expected behaviour because the SCM has been instructed to remove the
	 * file; therefore, the diff should display the versioned file content
	 * as being entirely removed. With this check, fnc now contrasts the
	 * behaviour of fossil(1), which produces the abovementioned unexpected
	 * output described in (1) and (2).
	 */
	if (change != FSL_CKOUT_CHANGE_REMOVED) {
		rc = fsl_ckout_file_content(f, false, abspath, &bplus);
		if (rc)
			goto end;
		/*
		 * To replicate fossil(1)'s behaviour—where a fossil rm'd file
		 * will either show as an unchanged or edited rather than a
		 * removed file with 'fossil diff -v' output—remove the above
		 * 'if (change != FSL_CKOUT_CHANGE_REMOVED)' from the else
		 * condition and uncomment the following three lines of code.
		 */
		/* if (change == FSL_CKOUT_CHANGE_REMOVED && */
		/*     !fsl_buffer_compare(bminus, &bplus)) */
		/*	fsl_buffer_clear(&bplus); */
		zplus = zminus;
	}

	switch (fsl_strlen(xminus)) {
	case FSL_STRLEN_K256:
		rc = fsl_sha3sum_buffer(&bplus, &xplus);
		break;
	case FSL_STRLEN_SHA1:
		rc = fsl_sha1sum_buffer(&bplus, &xplus);
		break;
	case NULL_DEVICELEN:
		switch (fsl_config_get_int32(f, FSL_CONFDB_REPO,
		    FSL_HPOLICY_AUTO, "hash-policy")) {
		case FSL_HPOLICY_SHA1:
			rc = fsl_sha1sum_buffer(&bplus, &xplus);
			break;
		case FSL_HPOLICY_AUTO:
			/* FALL THROUGH */
		case FSL_HPOLICY_SHA3:
			/* FALL THROUGH */
		case FSL_HPOLICY_SHA3_ONLY:
			rc = fsl_sha3sum_buffer(&bplus, &xplus);
			break;
		}
		break;
	default:
		RC(FSL_RC_SIZE_MISMATCH, "invalid artifact uuid [%s]", xminus);
		goto end;
	}
	if (rc)
		goto end;

	rc = write_diff_meta(buf, zminus, xminus, zplus, fsl_buffer_str(&xplus),
	    diff_flags, change);
	if (rc)
		goto end;

	verbose = (diff_flags & FSL_DIFF_VERBOSE) != 0 ? true : false;
	if (diff_flags & FSL_DIFF_BRIEF) {
		rc = fsl_buffer_compare(bminus, &bplus);
		if (!rc)
			rc = fsl_buffer_appendf(buf, "CHANGED -> %s\n", zminus);
	} else if (verbose || (bminus->used && bplus.used)) {
		rc = fsl_diff_text_to_buffer(bminus, &bplus, buf, context,
		    sbs, diff_flags);
	}

end:
	fsl_buffer_clear(&bplus);
	fsl_buffer_clear(&xplus);

	return rc;
}

/*
 * Parse the deck of non-checkin commits to present a 'fossil ui' equivalent
 * of the corresponding artifact when selected from the timeline.
 * TODO: Rename this horrible function name.
 */
static int
diff_non_checkin(fsl_buffer *buf, struct fnc_commit_artifact *commit,
    int diff_flags, int context, int sbs)
{
	fsl_cx		*f = fcli_cx();
	fsl_buffer	 wiki = fsl_buffer_empty;
	fsl_buffer	 pwiki = fsl_buffer_empty;
	fsl_id_t	 prid = 0;
	fsl_size_t	 idx;
	int		 rc = 0;

	fsl_deck *d = NULL;
	d = fsl_deck_malloc();
	if (d == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_deck_malloc");

	fsl_deck_init(f, d, FSL_SATYPE_ANY);
	if ((rc = fsl_deck_load_rid(f, d, commit->rid, FSL_SATYPE_ANY)))
		goto end;

	/*
	 * Present ticket commits as a series of field: value tuples as per
	 * the Fossil UI /info/UUID view.
	 */
	if (d->type == FSL_SATYPE_TICKET) {
		for (idx = 0; idx < d->J.used; ++idx) {
			fsl_card_J *ticket = d->J.list[idx];
			bool icom = !fsl_strncmp(ticket->field, "icom", 4);
			fsl_buffer_appendf(buf, "%d. %s:%s%s%c\n", idx + 1,
			    ticket->field, icom ? "\n\n" : " ", ticket->value,
			    icom ? '\n' : ' ');
		}
		goto end;
	}

	if (d->type == FSL_SATYPE_CONTROL) {
		for (idx = 0; idx < d->T.used; ++idx) {
			fsl_card_T *ctl = d->T.list[idx];
			fsl_buffer_appendf(buf, "Tag %d ", idx + 1);
			switch (ctl->type) {
			case FSL_TAGTYPE_CANCEL:
				fsl_buffer_append(buf, "[CANCEL]", -1);
				break;
			case FSL_TAGTYPE_ADD:
				fsl_buffer_append(buf, "[ADD]", -1);
				break;
			case FSL_TAGTYPE_PROPAGATING:
				fsl_buffer_append(buf, "[PROPAGATE]", -1);
				break;
			default:
				break;
			}
			if (ctl->uuid)
				fsl_buffer_appendf(buf, "\ncheckin %s",
				    ctl->uuid);
			fsl_buffer_appendf(buf, "\n%s", ctl->name);
			if (!fsl_strcmp(ctl->name, "branch"))
				commit->branch = fsl_strdup(ctl->value);
			if (ctl->value)
				fsl_buffer_appendf(buf, " -> %s", ctl->value);
			fsl_buffer_append(buf, "\n\n", 2);
		}
		goto end;
	}
	/*
	 * If neither a ticket nor control artifact, we assume it's a wiki, so
	 * check if it has a parent commit to diff against. If not, append the
	 * entire wiki card content.
	 */
	fsl_buffer_append(&wiki, d->W.mem, d->W.used);
	if (commit->puuid == NULL) {
		if (d->P.used > 0)
			commit->puuid = fsl_strdup(d->P.list[0]);
		else {
			fsl_buffer_copy(&wiki, buf);
			goto end;
		}
	}

	/* Diff the artifacts if a parent is found. */
	if ((rc = fsl_sym_to_rid(f, commit->puuid, FSL_SATYPE_ANY, &prid)))
		goto end;
	if ((rc = fsl_deck_load_rid(f, d, prid, FSL_SATYPE_ANY)))
		goto end;
	fsl_buffer_append(&pwiki, d->W.mem, d->W.used);

	rc = fsl_diff_text_to_buffer(&pwiki, &wiki, buf, context, sbs,
	    diff_flags);

	/* If a technote, provide the full content after its diff. */
	if (d->type == FSL_SATYPE_TECHNOTE)
		fsl_buffer_appendf(buf, "\n---\n\n%s", wiki.mem);

end:
	fsl_buffer_clear(&wiki);
	fsl_buffer_clear(&pwiki);
	fsl_deck_finalize(d);
	return rc;
}

/*
 * Compute the differences between two repository file artifacts to produce the
 * set of changes necessary to convert one into the other.
 *   buf         output buffer in which diff output will be appended
 *   vid1        repo record id of the version from which artifact a belongs
 *   a           file artifact being diffed against
 *   vid2        repo record id of the version from which artifact b belongs
 *   b           file artifact being diffed
 *   change      enum denoting the versioning change of the file
 *   diff_flags  bitwise flags to control the diff
 *   context     the number of context lines to surround changes
 *   sbs	 number of columns in which to display each side-by-side diff
 */
static int
diff_file_artifact(fsl_buffer *buf, fsl_id_t vid1, const fsl_card_F *a,
    fsl_id_t vid2, const fsl_card_F *b, enum fsl_ckout_change_e change,
    int diff_flags, int context, int sbs, enum fnc_diff_type diff_type)
{
	fsl_cx		*f = fcli_cx();
	fsl_stmt	 stmt = fsl_stmt_empty;
	fsl_buffer	 fbuf1 = fsl_buffer_empty;
	fsl_buffer	 fbuf2 = fsl_buffer_empty;
	char		*zminus0 = NULL, *zplus0 = NULL;
	const char	*zplus = NULL, *zminus = NULL;
	fsl_uuid_str	 xplus0 = NULL, xminus0 = NULL;
	fsl_uuid_str	 xplus = NULL, xminus = NULL;
	int		 rc = 0;
	bool		 verbose;

	assert(vid1 != vid2);
	assert(vid2 > 0 &&
	    "local checkout should be diffed with diff_checkout()");

	fbuf2.used = fbuf1.used = 0;

	if (a) {
		rc = fsl_card_F_content(f, a, &fbuf1);
		if (rc)
			goto end;
		zminus = a->name;
		xminus = a->uuid;
	} else if (diff_type == FNC_DIFF_BLOB) {
		rc = fsl_cx_prepare(f, &stmt,
		    "SELECT name FROM filename, mlink "
		    "WHERE filename.fnid=mlink.fnid AND mlink.fid = %d", vid1);
		if (rc) {
			rc = RC(FSL_RC_DB, "%s %d", "fsl_cx_prepare", vid1);
			goto end;
		}
		rc = fsl_stmt_step(&stmt);
		if (rc == FSL_RC_STEP_ROW) {
			rc = 0;
			zminus0 = fsl_strdup(fsl_stmt_g_text(&stmt, 0, NULL));
			zminus = zminus0;
		} else if (rc == FSL_RC_STEP_DONE)
			rc = 0;
		else if (rc) {
			rc = RC(rc, "%s", "fsl_stmt_step");
			goto end;
		}
		xminus0 = fsl_rid_to_uuid(f, vid1);
		xminus = xminus0;
		fsl_stmt_finalize(&stmt);
		fsl_content_get(f, vid1, &fbuf1);
	}
	if (b) {
		rc = fsl_card_F_content(f, b, &fbuf2);
		if (rc)
			goto end;
		zplus = b->name;
		xplus = b->uuid;
	} else if (diff_type == FNC_DIFF_BLOB) {
		rc = fsl_cx_prepare(f, &stmt,
		    "SELECT name FROM filename, mlink "
		    "WHERE filename.fnid=mlink.fnid AND mlink.fid = %d", vid2);
		if (rc) {
			rc = RC(FSL_RC_DB, "%s %d", "fsl_cx_prepare", vid2);
			goto end;
		}
		rc = fsl_stmt_step(&stmt);
		if (rc == FSL_RC_STEP_ROW) {
			rc = 0;
			zplus0 = fsl_strdup(fsl_stmt_g_text(&stmt, 0, NULL));
			zplus = zplus0;
		} else if (rc == FSL_RC_STEP_DONE)
			rc = 0;
		else if (rc) {
			rc = RC(rc, "%s", "fsl_stmt_step");
			goto end;
		}
		xplus0 = fsl_rid_to_uuid(f, vid2);
		xplus = xplus0;
		fsl_stmt_finalize(&stmt);
		fsl_content_get(f, vid2, &fbuf2);
	}

	rc = write_diff_meta(buf, zminus, xminus, zplus, xplus, diff_flags,
	    change);
	verbose = (diff_flags & FSL_DIFF_VERBOSE) != 0 ? true : false;
	if (verbose || (a && b))
		rc = fsl_diff_text_to_buffer(&fbuf1, &fbuf2, buf, context, sbs,
		    diff_flags);
	if (rc)
		RC(rc, "%s: fsl_diff_text_to_buffer\n"
		    " -> %s [%s]\n -> %s [%s]", fsl_rc_cstr(rc),
		    a ? a->name : NULL_DEVICE, a ? a->uuid : NULL_DEVICE,
		    b ? b->name : NULL_DEVICE, b ? b->uuid : NULL_DEVICE);
end:
	fsl_free(zminus0);
	fsl_free(zplus0);
	fsl_free(xminus0);
	fsl_free(xplus0);
	fsl_buffer_clear(&fbuf1);
	fsl_buffer_clear(&fbuf2);
	return rc;
}

static int
show_diff(struct fnc_view *view)
{
	struct fnc_diff_view_state	*s = &view->state.diff;
	char				*headln, *id2, *id1 = NULL;

	/* Some diffs (e.g., technote, tag) have no parent hash to display. */
	id1 = fsl_strdup(s->id1 ? s->id1 : "/dev/null");
	if (id1 == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_strdup");

	/*
	 * If diffing the work tree, we have no hash to display for it.
	 * XXX Display "work tree" or "checkout" or "/dev/null" for clarity?
	 */
	id2 = fsl_strdup(s->id2 ? s->id2 : "");
	if (id2 == NULL) {
		fsl_free(id1);
		return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
	}

	if ((headln = fsl_mprintf("diff %.40s %.40s", id1, id2)) == NULL) {
		fsl_free(id1);
		fsl_free(id2);
		return RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
	}

	fsl_free(id1);
	fsl_free(id2);
	return write_diff(view, headln);
}

static int
write_diff(struct fnc_view *view, char *headln)
{
	struct fnc_diff_view_state	*s = &view->state.diff;
	regmatch_t			*regmatch = &view->regmatch;
	struct fnc_colour		*c = NULL;
	wchar_t				*wcstr;
	char				*line;
	size_t				 linesz = 0;
	ssize_t				 linelen;
	off_t				 line_offset;
	int				 wstrlen;
	int				 max_lines = view->nlines;
	int				 nlines = s->nlines;
	int				 rc = 0, nprintln = 0;
	int				 match = -1;

	line_offset = s->line_offsets[s->first_line_onscreen - 1];
	if (fseeko(s->f, line_offset, SEEK_SET))
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR), "%s", "fseeko");

	werase(view->window);

	if (headln) {
		if ((line = fsl_mprintf("[%d/%d] %s", (s->first_line_onscreen -
		    1 + s->current_line), nlines, headln)) == NULL)
			return RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
		rc = formatln(&wcstr, &wstrlen, line, view->ncols, 0);
		fsl_free(line);
		fsl_free(headln);
		if (rc)
			return rc;

		if (screen_is_shared(view))
			wstandout(view->window);
		waddwstr(view->window, wcstr);
		fsl_free(wcstr);
		wcstr = NULL;
		if (screen_is_shared(view))
			wstandend(view->window);
		if (wstrlen <= view->ncols - 1)
			waddch(view->window, '\n');

		if (max_lines <= 1)
			return rc;
		--max_lines;
	}

	s->eof = false;
	line = NULL;
	while (max_lines > 0 && nprintln < max_lines) {
		linelen = getline(&line, &linesz, s->f);
		if (linelen == -1) {
			if (feof(s->f)) {
				s->eof = true;
				break;
			}
			fsl_free(line);
			RC(ferror(s->f) ? fsl_errno_to_rc(errno, FSL_RC_IO) :
			    FSL_RC_IO, "%s", "getline");
			return rc;
		}

		if (s->colour && (match = fsl_list_index_of(&s->colours, line,
		    match_line)) != -1)
			c = s->colours.list[match];
		if (c)
			wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
		if (s->first_line_onscreen + nprintln == s->matched_line &&
		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
			rc = write_matched_line(&wstrlen, line, view->ncols, 0,
			    view->window, regmatch);
			if (rc) {
				fsl_free(line);
				return rc;
			}
		} else {
			rc = formatln(&wcstr, &wstrlen, line, view->ncols, 0);
			if (rc) {
				fsl_free(line);
				return rc;
			}
			waddwstr(view->window, wcstr);
			fsl_free(wcstr);
			wcstr = NULL;
		}
		if (c) {
			wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
			c = NULL;
		}
		if (wstrlen <= view->ncols - 1)
			waddch(view->window, '\n');
		++nprintln;
	}
	fsl_free(line);
	if (nprintln >= 1)
		s->last_line_onscreen = s->first_line_onscreen + (nprintln - 1);
	else
		s->last_line_onscreen = s->first_line_onscreen;

	draw_vborder(view);

	if (s->eof) {
		while (nprintln < view->nlines) {
			waddch(view->window, '\n');
			++nprintln;
		}

		wstandout(view->window);
		waddstr(view->window, "(END)");
		wstandend(view->window);
	}

	return rc;
}

static int
match_line(const void *ln, const void *key)
{
	struct fnc_colour *c = (struct fnc_colour *)key;
	const char *line = ln;

	return regexec(&c->regex, line, 0, NULL, 0);
}

static bool
screen_is_shared(struct fnc_view *view)
{
	if (view_is_parent(view)) {
		if (view->child == NULL || view->child->active ||
		    !screen_is_split(view->child))
			return false;
	} else if (!screen_is_split(view))
		return false;

	return view->active;
}

static int
view_is_parent(struct fnc_view *view)
{
	return view->parent == NULL;
}

static int
screen_is_split(struct fnc_view *view)
{
	return view->start_col > 0;
}

static int
write_matched_line(int *col_pos, const char *line, int ncols_avail,
    int start_column, WINDOW *window, regmatch_t *regmatch)
{
	wchar_t		*wcstr;
	char		*s;
	int		 wstrlen;
	int		 rc = 0;

	*col_pos = 0;

	/* Copy the line up to the matching substring & write it to screen. */
	s = fsl_strndup(line, regmatch->rm_so);
	if (s == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_strndup");

	rc = formatln(&wcstr, &wstrlen, s, ncols_avail, start_column);
	if (rc) {
		free(s);
		return rc;
	}
	waddwstr(window, wcstr);
	free(wcstr);
	free(s);
	ncols_avail -= wstrlen;
	*col_pos += wstrlen;

	/* If not EOL, copy matching string & write to screen with highlight. */
	if (ncols_avail > 0) {
		s = fsl_strndup(line + regmatch->rm_so,
		    regmatch->rm_eo - regmatch->rm_so);
		if (s == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strndup");
			free(s);
			return rc;
		}
		rc = formatln(&wcstr, &wstrlen, s, ncols_avail, start_column);
		if (rc) {
			free(s);
			return rc;
		}
		wattr_on(window, A_REVERSE, NULL);
		waddwstr(window, wcstr);
		wattr_off(window, A_REVERSE, NULL);
		free(wcstr);
		free(s);
		ncols_avail -= wstrlen;
		*col_pos += wstrlen;
	}

	/* Write the rest of the line if not yet at EOL. */
	if (ncols_avail > 0 && fsl_strlen(line) > (fsl_size_t)regmatch->rm_eo) {
		rc = formatln(&wcstr, &wstrlen, line + regmatch->rm_eo,
		    ncols_avail, start_column);
		if (rc)
			return rc;
		waddwstr(window, wcstr);
		free(wcstr);
		*col_pos += wstrlen;
	}

	return rc;
}

static void
draw_vborder(struct fnc_view *view)
{
	const struct fnc_view	*view_above;
	char			*codeset = nl_langinfo(CODESET);
	PANEL			*panel;

	if (view->parent)
		draw_vborder(view->parent);

	panel = panel_above(view->panel);
	if (panel == NULL)
		return;

	view_above = panel_userptr(panel);
	mvwvline(view->window, view->start_ln, view_above->start_col - 1,
	    (strcmp(codeset, "UTF-8") == 0) ? ACS_VLINE : '|', view->nlines);
#ifdef __linux__
	wnoutrefresh(view->window);
#endif
}

static int
diff_input_handler(struct fnc_view **new_view, struct fnc_view *view, int ch)
{
	struct fnc_diff_view_state	*s = &view->state.diff;
	struct fnc_tl_view_state	*tlstate;
	struct commit_entry		*previous_selection;
	char				*line = NULL;
	ssize_t				 linelen;
	size_t				 linesz = 0;
	int				 i, rc = 0;
	bool				 tl_down = false;

	switch (ch) {
	case KEY_DOWN:
	case 'j':
		if (!s->eof)
			++s->first_line_onscreen;
		break;
	case KEY_NPAGE:
	case CTRL('f'):
	case ' ':
		if (s->eof)
			break;
		i = 0;
		while (!s->eof && i++ < view->nlines - 1) {
			linelen = getline(&line, &linesz, s->f);
			++s->first_line_onscreen;
			if (linelen == -1) {
				if (feof(s->f))
					s->eof = true;
				else
					RC(ferror(s->f) ?
					    fsl_errno_to_rc(errno, FSL_RC_IO) :
					    FSL_RC_IO, "%s", "getline");
				break;
			}
		}
		free(line);
		break;
	case KEY_END:
	case 'G':
		if (s->eof)
			break;
		s->first_line_onscreen = (s->nlines - view->nlines) + 2;
		s->eof = true;
		break;
	case KEY_UP:
	case 'k':
		if (s->first_line_onscreen > 1)
			--s->first_line_onscreen;
		break;
	case KEY_PPAGE:
	case CTRL('b'):
		if (s->first_line_onscreen == 1)
			break;
		i = 0;
		while (i++ < view->nlines - 1 && s->first_line_onscreen > 1)
			--s->first_line_onscreen;
		break;
	case 'g':
		if (!fnc_home(view))
			break;
		/* FALL THROUGH */
	case KEY_HOME:
		s->first_line_onscreen = 1;
		break;
	case 'c':
	case 'i':
	case 'v':
	case 'w':
		if (ch == 'c')
			s->colour = !s->colour;
		if (ch == 'i')
			s->diff_flags ^= FSL_DIFF_INVERT;
		if (ch == 'v')
			s->diff_flags ^= FSL_DIFF_VERBOSE;
		if (ch == 'w')
			s->diff_flags ^= FSL_DIFF_IGNORE_ALLWS;
		wclear(view->window);
		s->first_line_onscreen = 1;
		s->last_line_onscreen = view->nlines;
		show_diff_status(view);
		rc = create_diff(s);
		break;
	case '-':
	case '_':
		if (s->context > 0) {
			--s->context;
			show_diff_status(view);
			rc = create_diff(s);
			if (s->first_line_onscreen + view->nlines - 1 >
			    (int)s->nlines) {
				s->first_line_onscreen = 1;
				s->last_line_onscreen = view->nlines;
			}
		}
		break;
	case '+':
	case '=':
		if (s->context < DIFF_MAX_CTXT) {
			++s->context;
			show_diff_status(view);
			rc = create_diff(s);
		}
		break;
	case CTRL('j'):
	case '>':
	case '.':
	case 'J':
		tl_down = true;
		/* FALL THROUGH */
	case CTRL('k'):
	case '<':
	case ',':
	case 'K':
		if (s->timeline_view == NULL)
			break;
		tlstate = &s->timeline_view->state.timeline;
		previous_selection = tlstate->selected_commit;

		if ((rc = tl_input_handler(NULL, s->timeline_view,
		    tl_down ? KEY_DOWN : KEY_UP)))
			break;

		if (previous_selection == tlstate->selected_commit)
			break;

		if ((rc = set_selected_commit(s, tlstate->selected_commit)))
			break;

		s->first_line_onscreen = 1;
		s->last_line_onscreen = view->nlines;

		show_diff_status(view);
		rc = create_diff(s);
		break;
	default:
		break;
	}

	return rc;
}

static int
set_selected_commit(struct fnc_diff_view_state *s, struct commit_entry *entry)
{
	fsl_free(s->id2);
	s->id2 = fsl_strdup(entry->commit->uuid);
	if (s->id2 == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
	fsl_free(s->id1);
	s->id1 = entry->commit->puuid ? fsl_strdup(entry->commit->puuid) : NULL;
	s->selected_commit = entry->commit;

	return 0;
}

static int
diff_search_init(struct fnc_view *view)
{
	struct fnc_diff_view_state *s = &view->state.diff;

	s->matched_line = 0;
	return 0;
}

static int
diff_search_next(struct fnc_view *view)
{
	struct fnc_diff_view_state	*s = &view->state.diff;
	char				*line = NULL;
	ssize_t				 linelen;
	size_t				 linesz = 0;
	int				 start_ln;

	if (view->searching == SEARCH_DONE) {
		view->search_status = SEARCH_CONTINUE;
		return 0;
	}

	if (s->matched_line) {
		if (view->searching == SEARCH_FORWARD)
			start_ln = s->matched_line + 1;
		else
			start_ln = s->matched_line - 1;
	} else {
		if (view->searching == SEARCH_FORWARD)
			start_ln = 1;
		else
			start_ln = s->nlines;
	}

	while (1) {
		off_t offset;

		if (start_ln <= 0 || start_ln > (int)s->nlines) {
			if (s->matched_line == 0) {
				view->search_status = SEARCH_CONTINUE;
				break;
			}

			if (view->searching == SEARCH_FORWARD)
				start_ln = 1;
			else
				start_ln = s->nlines;
		}

		offset = s->line_offsets[start_ln - 1];
		if (fseeko(s->f, offset, SEEK_SET) != 0) {
			free(line);
			return RC(fsl_errno_to_rc(errno, FSL_RC_IO),
			    "%s", "fseeko");
		}
		linelen = getline(&line, &linesz, s->f);
		if (linelen != -1 && regexec(&view->regex, line, 1,
		    &view->regmatch, 0) == 0) {
			view->search_status = SEARCH_CONTINUE;
			s->matched_line = start_ln;
			break;
		}
		if (view->searching == SEARCH_FORWARD)
			++start_ln;
		else
			--start_ln;
	}
	free(line);

	if (s->matched_line) {
		s->first_line_onscreen = s->matched_line;
		s->current_line = 1;
	}

	return 0;
}

static int
close_diff_view(struct fnc_view *view)
{
	struct fnc_diff_view_state	*s = &view->state.diff;
	struct fsl_list_state		st = { FNC_COLOUR_OBJ };
	int				 rc = 0;

	if (s->f && fclose(s->f) == EOF)
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_IO), "%s", "fclose");
	fsl_free(s->id1);
	s->id1 = NULL;
	fsl_free(s->id2);
	s->id2 = NULL;
	fsl_free(s->line_offsets);
	fsl_list_clear(&s->colours, fsl_list_object_free, &st);
	s->line_offsets = NULL;
	s->nlines = 0;
	return rc;
}

static void
fnc_resizeterm(void)
{
	struct winsize	size;
	int		cols, lines;

	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
		cols = 80;
		lines = 24;
	} else {
		cols = size.ws_col;
		lines = size.ws_row;
	}
	resize_term(lines, cols);
}

static int
view_resize(struct fnc_view *view)
{
	int	 nlines, ncols;

	if (view->lines > LINES)
		nlines = view->nlines - (view->lines - LINES);
	else
		nlines = view->nlines + (LINES - view->lines);

	if (view->cols > COLS)
		ncols = view->ncols - (view->cols - COLS);
	else
		ncols = view->ncols + (COLS - view->cols);

	if (wresize(view->window, nlines, ncols) == ERR)
		return RC(FSL_RC_ERROR, "%s", "wresize");
	if (replace_panel(view->panel, view->window) == ERR)
		return RC(FSL_RC_ERROR, "%s", "replace_panel");
	wclear(view->window);

	view->nlines = nlines;
	view->ncols = ncols;
	view->lines = LINES;
	view->cols = COLS;

	if (view->child) {
		view->child->start_col = view_split_start_col(view->start_col);
		if (view->child->start_col == 0) {
			make_fullscreen(view->child);
			if (view->child->active)
				show_panel(view->child->panel);
			else
				show_panel(view->panel);
		} else {
			make_splitscreen(view->child);
			show_panel(view->child->panel);
		}
	}

	return 0;
}

/*
 * Consume repeatable arguments containing artifact type values used in
 * constructing the SQL query to generate commit records of the specified
 * type for the timeline. TODO: Enhance this to generalise processing of
 * various repeatable arguments--paths, usernames, branches, etc.--so we
 * can filter on multiples of these values.
 */
static int
fcli_flag_type_arg_cb(fcli_cliflag const *v)
{
	if (fnc_init.filter_types->nitems)
		fnc_init.filter_types->values =
		    fsl_realloc(fnc_init.filter_types->values,
		    (fnc_init.filter_types->nitems + 1) * sizeof(char *));
	fnc_init.filter_types->values[fnc_init.filter_types->nitems++] =
	    *((const char **)v->flagValue);

	return FCLI_RC_FLAG_AGAIN;
}

static void
sigwinch_handler(int sig)
{
	if (sig == SIGWINCH) {
		struct winsize winsz;

		ioctl(0, TIOCGWINSZ, &winsz);
		rec_sigwinch = 1;
	}
}

static void
sigpipe_handler(int sig)
{
	struct sigaction	sact;
	int			e;

	rec_sigpipe = 1;
	memset(&sact, 0, sizeof(sact));
	sact.sa_handler = SIG_IGN;
	sact.sa_flags = SA_RESTART;
	e = sigaction(SIGPIPE, &sact, NULL);
	if (e)
		err(1, "SIGPIPE");
}

static void
sigcont_handler(int sig)
{
	rec_sigcont = 1;
}

__dead static void
usage(void)
{
	/*
	 * It looks like the fsl_cx f member of the ::fcli singleton has
	 * already been cleaned up by the time this wrapper is called from
	 * fcli_help() after hijacking the process whenever the '--help'
	 * argument is passsed on the command line, so we can't use the
	 * f->output fsl_outputer implementation as we would like.
	 */
	/* fsl_cx *f = fcli_cx(); */
	/* f->output = fsl_outputer_FILE; */
	/* f->output.state.state = (fnc_init.err == true) ? stderr : stdout; */
        FILE *f = fnc_init.err ? stderr : stdout;
	size_t idx = 0;

	endwin();

	/* If a command was passed on the CLI, output its corresponding help. */
	if (fnc_init.cmdarg)
		for (idx = 0; idx < nitems(fnc_init.cmd_args); ++idx) {
			fcli_command cmd = fnc_init.cmd_args[idx];
			if (!fsl_strcmp(fnc_init.cmdarg, cmd.name) ||
			    fcli_cmd_aliascmp(&cmd, fnc_init.cmdarg)) {
				fcli_command_help(&cmd, true, true);
				exit(fcli_end_of_main(fnc_init.err));
			}
		}

	/* Otherwise, output help/usage for all commands. */
	fcli_command_help(fnc_init.cmd_args, true, false);
	fsl_fprintf(f, "  note: %s "
	    "with no args defaults to the timeline command.\n\n",
	    fcli_progname());

	exit(fcli_end_of_main(fnc_init.err));
}

static void
usage_timeline(void)
{
	fsl_fprintf(fnc_init.err ? stderr : stdout,
	    " usage: %s timeline [-C|--no-colour] [-T tag] [-b branch] "
	    "[-c commit] [-h|--help] [-n n] [-t type] [-u user] [-z|--utc] "
	    "[path]\n"
	    "  e.g.: %s timeline --type ci -u jimmy src/frobnitz.c\n\n",
	    fcli_progname(), fcli_progname());
}

static void
usage_diff(void)
{
	fsl_fprintf(fnc_init.err ? stderr : stdout,
	    " usage: %s diff [-C|--no-colour] [-h|--help] [-i|--invert]"
	    " [-q|--quiet] [-w|--whitespace] [-x|--context n] "
	    "[artifact1 [artifact2]] [path ...]\n  "
	    "e.g.: %s diff --context 3 d34db33f c0ff33 src/*.c\n\n",
	    fcli_progname(), fcli_progname());
}

static void
usage_tree(void)
{
	fsl_fprintf(fnc_init.err ? stderr : stdout,
	    " usage: %s tree [-C|--no-colour] [-c commit] [-h|--help] [path]\n"
	    "  e.g.: %s tree -c d34dc0d3\n\n" ,
	    fcli_progname(), fcli_progname());
}

static void
usage_blame(void)
{
	fsl_fprintf(fnc_init.err ? stderr : stdout,
	    " usage: %s blame [-C|--no-colour] [-c commit [-r]] [-h|--help] "
	    "[-n n] path\n"
	    "  e.g.: %s blame -c d34db33f src/foo.c\n\n" ,
	    fcli_progname(), fcli_progname());
}

static void
usage_branch(void)
{
	fsl_fprintf(fnc_init.err ? stderr : stdout,
	    " usage: %s branch [-C|--no-colour] [-a|--after date] "
	    "[-b|--before date] [-c|--closed] [-h|--help] [-o|--open] "
	    "[-p|--no-private] [-r|--reverse] [-s|--sort order] [glob]\n"
	    "  e.g.: %s branch -b 2020-10-10\n\n" ,
	    fcli_progname(), fcli_progname());
}

static int
cmd_diff(fcli_command const *argv)
{
	fsl_cx				*f = fcli_cx();
	struct fnc_view			*view;
	struct fnc_commit_artifact	*commit = NULL;
	struct fnc_pathlist_head	 paths;
	struct fnc_pathlist_entry	*pe;
	fsl_deck			 d = fsl_deck_empty;
	fsl_stmt			*q = NULL;
	const char			*artifact1 = NULL, *artifact2 = NULL;
	char				*path0 = NULL;
	fsl_id_t			 prid = -1, rid = -1;
	int				 context = DIFF_DEF_CTXT, rc = 0;
	unsigned short			 blob = 0;
	enum fnc_diff_type		 diff_type;
	bool				 showmeta = false;

	rc = fcli_process_flags(argv->flags);
	if (rc || (rc = fcli_has_unused_flags(false)))
		return rc;

	TAILQ_INIT(&paths);

	/*
	 * To provide an intuitive UI, use some magic. First, if there's an arg
	 * and it's a symbolic checkin name, take as a checkin artifact. Repeat
	 * for the next arg. If just one is a checkin, diff changes on disk
	 * against it. If neither are checkins, diff changes on disk against the
	 * current checkout. If both are checkins, diff against eachother. Treat
	 * any non-symbol args as paths and try map to a valid repo path or F
	 * card in the checkin(s) deck(s). It's tricky, but provides a smart UI:
	 * fnc diff f1 f2 ... -> diff f{1,2,...} on disk against current ckout
	 * fnc diff sym3 f1 -> diff f1 on disk against f1 found in checkin sym3
	 * fnc diff sym1 sym2 f1 f2 -> diff f{1,2} between checkins sym1 & sym2
	 */
	if (!fsl_sym_to_rid(f, fcli_next_arg(false), FSL_SATYPE_ANY, &prid)) {
		artifact1 = fcli_next_arg(true);
		if (!fsl_rid_is_a_checkin(f, prid)) {
			if (fsl_rid_to_artifact_uuid(f, prid, FSL_SATYPE_ANY)
			    != NULL) {
				rc = RC(FSL_RC_TYPE,
				    "artifact [%s] not resolvable to a checkin",
				    artifact1);
				goto end;
			}
			++blob;
		}
		if (!fsl_sym_to_rid(f, fcli_next_arg(false), FSL_SATYPE_ANY,
		    &rid)) {
			artifact2 = fcli_next_arg(true);
			diff_type = FNC_DIFF_COMMIT;
			if (!fsl_rid_is_a_checkin(f, rid)) {
				if (fsl_rid_to_artifact_uuid(f,
				    prid, FSL_SATYPE_ANY) != NULL) {
					rc = RC(FSL_RC_TYPE, "artifact [%s] "
					    "not resolvable to a checkin",
					    artifact2);
					goto end;
				}
				++blob;
			}
		}
	}
	if (fcli_error()->code == FSL_RC_NOT_FOUND) {
		fcli_err_reset();  /* If args aren't symbols, treat as paths. */
		rc = 0;
	}
	if (blob == 2)
		diff_type = FNC_DIFF_BLOB;
	if (!artifact1 && diff_type != FNC_DIFF_BLOB) {
		artifact1 = "current";
		rc = fsl_sym_to_rid(f, artifact1, FSL_SATYPE_CHECKIN, &prid);
		if (rc || prid < 0) {
			rc = RC(rc, "%s", "fsl_sym_to_rid");
			goto end;
		}
	}
	if (!artifact2 && diff_type != FNC_DIFF_BLOB) {
		diff_type = FNC_DIFF_CKOUT;
		fsl_ckout_version_info(f, &rid, NULL);
		if ((rc = fsl_ckout_changes_scan(f)))
			return RC(rc, "%s", "fsl_ckout_changes_scan");
		if (!fsl_strcmp(artifact1, "current") &&
		    !fsl_ckout_has_changes(f)) {
			fsl_fprintf(stdout, "No local changes.\n");
			return rc;
		}
	}
	while (fcli_next_arg(false) && diff_type != FNC_DIFF_BLOB) {
		struct fnc_pathlist_entry *ins;
		char *path, *path_to_diff;
		rc = map_repo_path(&path0);
		path = path0;
		while (path[0] == '/')
			++path;
		if (rc) {
			if (rc != FSL_RC_NOT_FOUND ||
			    (!fsl_strcmp(artifact1, "current") && !artifact2))
				goto end;
			rc = 0;
			fcli_err_reset();
			/* Path may be valid in tree of specified commit(s). */
			const fsl_card_F *cf = NULL;
			rc = fsl_deck_load_sym(f, &d, artifact1,
			    FSL_SATYPE_CHECKIN);
			if (rc)
				goto end;
			cf = fsl_deck_F_search(&d, path);
			if (cf == NULL) {
				if (!artifact2) {
					rc = RC(FSL_RC_NOT_FOUND,
					    "'%s' not found in tree [%s]", path,
					    artifact1);
					goto end;
				}
				fsl_deck_finalize(&d);
				rc = fsl_deck_load_sym(f, &d, artifact2,
				    FSL_SATYPE_CHECKIN);
				if (rc)
					goto end;
				cf = fsl_deck_F_search(&d, path);
				if (cf == NULL) {
					rc = RC(FSL_RC_NOT_FOUND,
					    "'%s' not found in trees [%s] [%s]",
					    path, artifact1, artifact2);
					goto end;
				}
			}
		}
		path_to_diff = fsl_strdup(path);
		if (path_to_diff == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
		rc = fnc_pathlist_insert(&ins, &paths, path_to_diff, NULL);
		if (rc || ins == NULL /* Duplicate path. */)
			fsl_free(path_to_diff);
		if (rc)
			goto end;
	}

	if (diff_type != FNC_DIFF_BLOB && diff_type != FNC_DIFF_CKOUT) {
		q = fsl_stmt_malloc();
		rc = commit_builder(&commit, rid, q);
		if (rc)
			goto end;
		if (commit->prid == prid)
			showmeta = true;
		else {
			fsl_free(commit->puuid);
			commit->prid = prid;
			commit->puuid = fsl_rid_to_uuid(f, prid);
		}
	} else {
		commit = calloc(1, sizeof(*commit));
		if (commit == NULL) {
			rc = RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
			    "%s", "calloc");
			goto end;
		}
		commit->prid = prid;
		commit->rid = rid;
		commit->puuid = fsl_rid_to_uuid(f, prid);
		commit->uuid = fsl_rid_to_uuid(f, rid);
		commit->type = fsl_strdup("blob");
		commit->diff_type = diff_type;
	}

	rc = init_curses();
	if (rc)
		goto end;

	if (fnc_init.context) {
		if ((rc = strtonumcheck(&context, fnc_init.context, INT_MIN,
		    INT_MAX)))
			goto end;
		context = MIN(DIFF_MAX_CTXT, context);
	}

	view = view_open(0, 0, 0, 0, FNC_VIEW_DIFF);
	if (view == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "view_open");
		goto end;
	}

	rc = open_diff_view(view, commit, context, fnc_init.ws,
	    fnc_init.invert, !fnc_init.quiet, NULL, showmeta, &paths);
	if (!rc)
		rc = view_loop(view);
end:
	fsl_free(path0);
	fsl_deck_finalize(&d);
	fsl_stmt_finalize(q);
	if (commit)
		fnc_commit_artifact_close(commit);
	TAILQ_FOREACH(pe, &paths, entry)
		free((char *)pe->path);
	fnc_pathlist_free(&paths);
	return rc;
}

static int
browse_commit_tree(struct fnc_view **new_view, int start_col,
    struct commit_entry *entry, const char *path)
{
	struct fnc_view	*tree_view;
	int		 rc = 0;

	tree_view = view_open(0, 0, 0, start_col, FNC_VIEW_TREE);
	if (tree_view == NULL)
		return RC(FSL_RC_ERROR, "%s", "view_open");

	rc = open_tree_view(tree_view, path, entry->commit->rid);
	if (rc)
		return rc;

	*new_view = tree_view;

	return rc;
}

static int
cmd_tree(fcli_command const *argv)
{
	fsl_cx		*f = fcli_cx();
	struct fnc_view	*view;
	char		*path = NULL;
	fsl_id_t	 rid;
	int		 rc = 0;

	rc = fcli_process_flags(argv->flags);
	if (rc || (rc = fcli_has_unused_flags(false)))
		goto end;

	rc = map_repo_path(&path);
	if (rc)
		goto end;
	if (fnc_init.sym)
		rc = fsl_sym_to_rid(f, fnc_init.sym, FSL_SATYPE_ANY, &rid);
	else
		fsl_ckout_version_info(f, &rid, NULL);

	if (rc) {
		switch (rc) {
		case FSL_RC_AMBIGUOUS:
			RC(rc, "prefix too ambiguous [%s]",
			    fnc_init.sym);
			goto end;
		case FSL_RC_NOT_A_REPO:
			RC(rc, "%s tree needs a local checkout",
			    fcli_progname());
			goto end;
		case FSL_RC_NOT_FOUND:
			RC(rc, "invalid symbolic checkin name [%s]",
			    fnc_init.sym);
			goto end;
		case FSL_RC_MISUSE:
			/* FALL THROUGH */
		default:
			goto end;
		}
	}

	/* In 'fnc tree -R repo.db [path]' case, use the latest checkin. */
	if (rid == 0) {
		rc = fsl_sym_to_rid(f, "tip", FSL_SATYPE_CHECKIN, &rid);
		if (rc)
			goto end;
	} else if (!fsl_rid_is_a_checkin(f, rid)) {
		rc = RC(FSL_RC_TYPE, "%s tree requires check-in artifact",
		    fcli_progname());
		goto end;
	}

	rc = init_curses();
	if (rc)
		goto end;

	view = view_open(0, 0, 0, 0, FNC_VIEW_TREE);
	if (view == NULL) {
		RC(FSL_RC_ERROR, "%s", "view_open");
		goto end;
	}

	rc = open_tree_view(view, path, rid);
	if (!rc)
		rc = view_loop(view);
end:
	fsl_free(path);
	return rc;
}

static int
open_tree_view(struct fnc_view *view, const char *path, fsl_id_t rid)
{
	fsl_cx				*f = fcli_cx();
	struct fnc_tree_view_state	*s = &view->state.tree;
	int				 rc = 0;

	TAILQ_INIT(&s->parents);
	s->show_id = false;
	s->colour = !fnc_init.nocolour && has_colors();
	s->rid = rid;
	s->commit_id = fsl_rid_to_uuid(f, rid);
	if (s->commit_id == NULL)
		return RC(FSL_RC_AMBIGUOUS, "%s", "fsl_rid_to_uuid");

	/*
	 * Construct tree of entire repository from which all (sub)tress will
	 * be derived. This object will be released when this view closes.
	 */
	rc = create_repository_tree(&s->repo, &s->commit_id, s->rid);
	if (rc)
		goto end;

	/*
	 * Open the initial root level of the repository tree now. Subtrees
	 * opened during traversal are built and destroyed on demand.
	 */
	rc = tree_builder(s->repo, &s->root, "/");
	if (rc)
		goto end;
	s->tree = s->root;
	/*
	 * If user has supplied a path arg (i.e., fnc tree path/in/repo), or
	 * has selected a commit from an 'fnc timeline path/in/repo' command,
	 * walk the path and open corresponding (sub)tree objects now.
	 */
	if (!fnc_path_is_root_dir(path)) {
		rc = walk_tree_path(s, s->repo, &s->root, path);
		if (rc)
			goto end;
	}


	if ((s->tree_label = fsl_mprintf("checkin %s", s->commit_id)) == NULL) {
		rc = RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
		goto end;
	}

	s->first_entry_onscreen = &s->tree->entries[0];
	s->selected_entry = &s->tree->entries[0];

	if (s->colour)
		set_colours(&s->colours, FNC_VIEW_TREE);

	view->show = show_tree_view;
	view->input = tree_input_handler;
	view->close = close_tree_view;
	view->search_init = tree_search_init;
	view->search_next = tree_search_next;
end:
	if (rc)
		close_tree_view(view);
	return rc;
}

/*
 * Decompose the supplied path into its constituent components, then build,
 * open and visit each subtree segment on the way to the requested entry.
 */
static int
walk_tree_path(struct fnc_tree_view_state *s, struct fnc_repository_tree *repo,
    struct fnc_tree_object **root, const char *path)
{
	struct fnc_tree_object	*tree = NULL;
	const char		*p;
	char			*slash, *subpath = NULL;
	int			 rc = 0;

	/* Find each slash and open preceding directory segment as a tree. */
	p = path;
	while (*p) {
		struct fnc_tree_entry	*te;
		char			*te_name;

		while (p[0] == '/')
			p++;

		slash = strchr(p, '/');
		if (slash == NULL)
			te_name = fsl_strdup(p);
		else
			te_name = fsl_strndup(p, slash - p);
		if (te_name == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			break;
		}

		te = find_tree_entry(s->tree, te_name, fsl_strlen(te_name));
		if (te == NULL) {
			rc = RC(FSL_RC_NOT_FOUND, "find_tree_entry(%s)",
			    te_name);
			fsl_free(te_name);
			break;
		}
		fsl_free(te_name);

		s->first_entry_onscreen = s->selected_entry = te;
		if (!S_ISDIR(s->selected_entry->mode))
			break;	/* If a file, jump to this entry. */

		slash = strchr(p, '/');
		if (slash)
			subpath = fsl_strndup(path, slash - path);
		else
			subpath = fsl_strdup(path);
		if (subpath == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			break;
		}

		rc = tree_builder(repo, &tree, subpath + 1 /* Leading slash */);
		if (rc)
			break;
		rc = visit_subtree(s, tree);
		if (rc) {
			fnc_object_tree_close(tree);
			break;
		}

		if (slash == NULL)
			break;
		fsl_free(subpath);
		subpath = NULL;
		p = slash;
	}

	fsl_free(subpath);
	return rc;
}

/*
 * This routine constructs the repository tree, repo, which is a DLL; from this
 * tree, all displayed (sub)trees are derived. File paths are extracted from F
 * cards of the checkin identified by id referenced in the repo database by rid.
 */
static int
create_repository_tree(struct fnc_repository_tree **repo, fsl_uuid_str *id,
    fsl_id_t rid)
{
	fsl_cx				*f = fcli_cx();
	struct fnc_repository_tree	*ptr;
	fsl_deck			 d = fsl_deck_empty;
	const fsl_card_F		*cf = NULL;
	int				 rc = 0;

	ptr = fsl_malloc(sizeof(struct fnc_repository_tree));
	if (ptr == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_malloc");
	memset(ptr, 0, sizeof(struct fnc_repository_tree));

	rc = fsl_deck_load_rid(fcli_cx(), &d, rid, FSL_SATYPE_CHECKIN);
	if (rc)
		return RC(rc, "fsl_deck_load_rid(%d) [%s]", rid, id);
	rc = fsl_deck_F_rewind(&d);
	if (rc)
		goto end;;
	rc = fsl_deck_F_next(&d, &cf);
	if (rc)
		goto end;;

	while (cf) {
		char		*filename = NULL, *uuid = NULL;
		fsl_time_t	 mtime;

		filename = fsl_strdup(cf->name);
		if (filename == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
		uuid = fsl_strdup(cf->uuid);
		if (uuid == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
		rc = fsl_mtime_of_F_card(f, rid, cf, &mtime);
		if (!rc)
			rc = link_tree_node(ptr, filename, uuid, mtime);
		fsl_free(filename);
		fsl_free(uuid);
		if (!rc)
			rc = fsl_deck_F_next(&d, &cf);
		if (rc)
			goto end;
	}
end:
	fsl_deck_finalize(&d);

	*repo = ptr;
	return rc;
}

/*
 * This routine constructs the (sub)trees that are displayed. The directory dir
 * and its contents form a subtree, which is an array of tree entries copied
 * from DLL nodes in repo and stored in tree. This routine is called for each
 * directory that is displayed as a tree.
 */
static int
tree_builder(struct fnc_repository_tree *repo, struct fnc_tree_object **tree,
    const char *dir)
{
	struct fnc_tree_entry		*te = NULL;
	struct fnc_repo_tree_node	*tn = NULL;
	int				 i = 0;

	*tree = NULL;
	*tree = fsl_malloc(sizeof(**tree));
	if (*tree == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_malloc");
	memset(*tree, 0, sizeof(**tree));

	/* Count how many elements will comprise the tree to be allocated. */
	for(tn = repo->head; tn; tn = tn->next) {
		if ((!tn->parent_dir && fsl_strcmp(dir, "/")) ||
		    (tn->parent_dir && fsl_strcmp(dir, tn->parent_dir->path)))
			continue;
		++i;
	}
	(*tree)->entries = calloc(i, sizeof(struct fnc_tree_entry));
	if ((*tree)->entries == NULL)
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR), "%s", "calloc");
	/* Construct the tree to be displayed. */
	for(tn = repo->head, i = 0; tn; tn = tn->next) {
		if ((!tn->parent_dir && fsl_strcmp(dir, "/")) ||
		    (tn->parent_dir && fsl_strcmp(dir, tn->parent_dir->path)))
			continue;
		te = &(*tree)->entries[i];
		te->mode = tn->mode;
		te->mtime = tn->mtime;
		te->basename = fsl_strdup(tn->basename);
		if (te->basename == NULL)
			return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		te->path = fsl_strdup(tn->path);
		if (te->path == NULL)
			return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		te->uuid = fsl_strdup(tn->uuid);
		if (te->uuid == NULL && !S_ISDIR(te->mode))
			return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		te->idx = i++;
	}
	(*tree)->nentries = i;

	return 0;
}

#if 0
static void
delete_tree_node(struct fnc_tree_entry **head, struct fnc_tree_entry *del)
{
	struct fnc_tree_entry *temp = *head, *prev;

	if (temp == del) {
		*head = temp->next;
		fsl_free(temp);
		return;
	}

	while (temp != NULL && temp != del) {
		prev = temp;
		temp = temp->next;
	}

	if (temp == NULL)
		return;

	prev->next = temp->next;

	fsl_free(temp);
}
#endif

/*
 * This routine inserts nodes into the doubly-linked repository tree. Each
 * path component of path (i.e., tokens delimited by '/') becomes a node in
 * tree. The final path component of each segment is the node's .basename, and
 * its full repository relative path its .path. All files in a given directory
 * will comprise the directory node's .children list, and each file node's
 * .sibling list; said directory will be each file node's .parent_dir. The
 * elements of each requested tree will be identified by the node's .parent_dir;
 * that is, each node with the same parent_dir will be an entry in the same tree
 *   tree    The repository tree into which nodes are inserted
 *   path    The repository relative pathname of the versioned file
 *   uuid    The SHA hash of the file
 *   mtime   Modification time of the file
 * Returns 0 on success, non-zero on error.
 */
static int
link_tree_node(struct fnc_repository_tree *tree, const char *path,
    const char *uuid, fsl_time_t mtime)
{
	fsl_cx				*f = fcli_cx();
	struct fnc_repo_tree_node	*parent_dir;
	fsl_buffer			 buf = fsl_buffer_empty;
	struct stat			 s;
	int				 i, rc = 0;

	parent_dir = tree->tail;
	while (parent_dir != 0 &&
	    (strncmp(parent_dir->path, path, parent_dir->pathlen) != 0 ||
            path[parent_dir->pathlen] != '/'))
		parent_dir = parent_dir->parent_dir;

	i = parent_dir ? parent_dir->pathlen + 1 : 0;

	while (path[i]) {
		struct fnc_repo_tree_node	*tn;
		int				 nodesz, slash = i;

		/* Find slash to demarcate each path component. */
		while (path[i] && path[i] != '/')
			i++;
		nodesz = sizeof(*tn) + i + 1;

		/*
		 * If not at end of path string, node is a directory so don't
		 * allocate space for the hash.
		 */
		if (uuid != 0 && path[i] == '\0')
			nodesz += FSL_STRLEN_K256 + 1; /* NUL */
		tn = fsl_malloc(nodesz);
		if (tn == NULL)
			return RC(FSL_RC_ERROR, "%s", "fsl_malloc");
		memset(tn, 0, sizeof(*tn));

		tn->path = (char *)&tn[1];
		memcpy(tn->path, path, i);
		tn->path[i] = '\0';
		tn->pathlen = i;

		if (uuid != 0 && path[i] == '\0') {
			tn->uuid = tn->path + i + 1;
			memcpy(tn->uuid, uuid, fsl_strlen(uuid) + 1);
		}

		tn->basename = tn->path + slash;

		/* Insert node into DLL or make it the head if first. */
		if (tree->tail) {
			tree->tail->next = tn;
			tn->prev = tree->tail;
		} else
			tree->head = tn;

		tree->tail = tn;
		tn->parent_dir = parent_dir;
		if (parent_dir) {
			if (parent_dir->children)
				parent_dir->lastchild->sibling = tn;
			else
				parent_dir->children = tn;
			tn->nparents = parent_dir->nparents + 1;
			parent_dir->lastchild = tn;
		} else {
			if (tree->rootail)
				tree->rootail->sibling = tn;
			tree->rootail = tn;
		}

		tn->mtime = mtime;
		while (path[i] == '/')	/* Consume slashes. */
			++i;
		parent_dir = tn;

		/* Stat path for tree display features. */
		rc = fsl_file_canonical_name2(f->ckout.dir, tn->path, &buf,
		    false);
		if (rc)
			goto end;
		if (lstat(fsl_buffer_cstr(&buf), &s) == -1) {
			if (errno == ENOENT)
				tn->mode = (!fsl_strcmp(tn->path, path) &&
				    tn->uuid) ? S_IFREG : S_IFDIR;
			else {
				rc = RC(fsl_errno_to_rc(errno, FSL_RC_ACCESS),
				    "lstat(%s)", fsl_buffer_cstr(&buf));
				goto end;
			}
		} else
			tn->mode = s.st_mode;
		fsl_buffer_reuse(&buf);
	}

	while (parent_dir && parent_dir->parent_dir) {
		if (parent_dir->parent_dir->mtime < parent_dir->mtime)
			parent_dir->parent_dir->mtime = parent_dir->mtime;
		parent_dir = parent_dir->parent_dir;
	}
end:
	fsl_buffer_clear(&buf);
	return rc;
}

static int
show_tree_view(struct fnc_view *view)
{
	struct fnc_tree_view_state	*s = &view->state.tree;
	char				*treepath;
	int				 rc = 0;

	rc = tree_entry_path(&treepath, &s->parents, NULL);
	if (rc)
		return rc;

	rc = draw_tree(view, treepath);
	fsl_free(treepath);
	draw_vborder(view);

	return rc;
}

/*
 * Construct absolute repository path of the currently selected tree entry to
 * display in the tree view header, or pass to open_timeline_view() to construct
 * a timeline of all commits modifying path.
 */
static int
tree_entry_path(char **path, struct fnc_parent_trees *parents,
    struct fnc_tree_entry *te)
{
	struct fnc_parent_tree	*pt;
	size_t			 len = 2;  /* Leading slash and NUL. */
	int			 rc = 0;

	TAILQ_FOREACH(pt, parents, entry)
		len += strlen(pt->selected_entry->basename) + 1 /* slash */;
	if (te)
		len += strlen(te->basename);

	*path = calloc(1, len);
	if (path == NULL)
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR), "%s", "calloc");

	(*path)[0] = '/';  /* Make it absolute from the repository root. */
	pt = TAILQ_LAST(parents, fnc_parent_trees);
	while (pt) {
		const char *name = pt->selected_entry->basename;
		if (strlcat(*path, name, len) >= len) {
			rc = RC(FSL_RC_RANGE, "strlcat(%s, %s, %d)",
			    *path, name, len);
			goto end;
		}
		if (strlcat(*path, "/", len) >= len) {
			rc = RC(FSL_RC_RANGE, "strlcat(%s, \"/\", %d)",
			    *path, len);
			goto end;
		}
		pt = TAILQ_PREV(pt, fnc_parent_trees, entry);
	}
	if (te) {
		if (strlcat(*path, te->basename, len) >= len) {
			rc = RC(FSL_RC_RANGE, "strlcat(%s, %s, %d)",
			    *path, te->basename, len);
			goto end;
		}
	}
end:
	if (rc) {
		fsl_free(*path);
		*path = NULL;
	}
	return rc;
}

/*
 * Draw the currently visited tree. Headline view with the checkin's SHA hash,
 * and write subheader comprised of the tree path. Lexicographically order nodes
 * (cf. ls(1)) and postfix with identifier corresponding to the file mode as
 * returned by lstat(2) such that the tree takes the following form:
 *
 *  checkin COMMIT-HASH
 *  /absolute/repository/tree/path/
 *
 *   ..
 *   dir/
 *   executable*
 *   regularfile
 *   symlink@ -> /path/to/source/file
 *
 * If the 'i' key binding is entered, prefix each versioned file with its
 * SHA{1,3} hash. Directories, however, have no such hash UUID to display.
 */
static int
draw_tree(struct fnc_view *view, const char *treepath)
{
	struct fnc_tree_view_state	*s = &view->state.tree;
	struct fnc_tree_entry		*te;
	struct fnc_colour		*c = NULL;
	wchar_t				*wcstr;
	int				 match = -1, rc = 0;
	int				 wstrlen, n, idx, nentries;
	int				 limit = view->nlines;
	uint_fast8_t			 hashlen = FSL_UUID_STRLEN_MIN;

	s->ndisplayed = 0;
	werase(view->window);
	if (limit == 0)
		return rc;

	/* Write (highlighted) headline (if view is active in splitscreen). */
	rc = formatln(&wcstr, &wstrlen, s->tree_label, view->ncols, 0);
	if (rc)
		return rc;
	if (screen_is_shared(view))
		wstandout(view->window);
	if (s->colour)
		c = get_colour(&s->colours, FNC_COMMIT_ID);
	if (c)
		wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
	waddwstr(view->window, wcstr);
	if (c)
		wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
	if (screen_is_shared(view))
		wstandend(view->window);
	fsl_free(wcstr);
	wcstr = NULL;
	if (wstrlen < view->ncols - 1)
		waddch(view->window, '\n');
	if (--limit <= 0)
		return rc;

	/* Write this (sub)tree's absolute repository path subheader. */
	rc = formatln(&wcstr, &wstrlen, treepath, view->ncols, 0);
	if (rc)
		return rc;
	waddwstr(view->window, wcstr);
	fsl_free(wcstr);
	wcstr = NULL;
	if (wstrlen < view->ncols - 1)
		waddch(view->window, '\n');
	if (--limit <= 0)
		return rc;
	waddch(view->window, '\n');
	if (--limit <= 0)
		return rc;

	/* Write parent dir entry (i.e., "..") if top of the tree is in view. */
	if (s->first_entry_onscreen == NULL) {
		te = &s->tree->entries[0];
		if (s->selected_idx == 0) {
			if (view->active)
				wattr_on(view->window, A_REVERSE, NULL);
			s->selected_entry = NULL;
		}
		waddstr(view->window, "  ..\n");
		if (s->selected_idx == 0 && view->active)
			wattr_off(view->window, A_REVERSE, NULL);
		++s->ndisplayed;
		if (--limit <= 0)
			return rc;
		n = 1;
	} else {
		n = 0;
		te = s->first_entry_onscreen;
	}

	nentries = s->tree->nentries;
	for (idx = 0; idx < nentries; ++idx)	/* Find max hash length. */
		if (hashlen < fsl_strlen(s->tree->entries[idx].uuid))
			hashlen = fsl_strlen(s->tree->entries[idx].uuid);
	/* Iterate and write tree nodes postfixed with path type identifier. */
	for (idx = te->idx; idx < nentries; ++idx) {
		char		*line = NULL, *idstr = NULL, *targetlnk = NULL;
		const char	*modestr = "";
		mode_t		 mode;

		if (idx < 0 || idx >= s->tree->nentries)
			return 0;
		te = &s->tree->entries[idx];
		mode = te->mode;

		if (s->show_id) {
			idstr = fsl_strdup(te->uuid);
			/* Directories don't have UUIDs; pad with "..." dots. */
			if (idstr == NULL && !S_ISDIR(mode))
				return RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			/* If needed, pad SHA1 hash to align w/ SHA3 hashes. */
			if (idstr == NULL || fsl_strlen(idstr) < hashlen) {
				char buf[hashlen], pad = '.';
				idstr = fsl_mprintf("%s%s", idstr ? idstr : "",
				    (char *)memset(buf, pad,
				    hashlen - fsl_strlen(idstr)));
				if (idstr == NULL)
					return RC(FSL_RC_RANGE,
					    "%s", "fsl_mprintf");
				idstr[hashlen] = '\0';
				/* idstr = fsl_mprintf("%*c", hashlen, ' '); */
			}
		}
		if (S_ISLNK(mode)) {
			fsl_size_t	ch;

			rc = tree_entry_get_symlink_target(&targetlnk, te);
			if (rc) {
				fsl_free(idstr);
				return rc;
			}
			for (ch = 0; ch < fsl_strlen(targetlnk); ++ch) {
				if (!isprint((unsigned char)targetlnk[ch]))
					targetlnk[ch] = '?';
			}
			modestr = "@";
		}
		else if (S_ISDIR(mode))
			modestr = "/";
		else if (mode & S_IXUSR)
			modestr = "*";
		if ((line = fsl_mprintf("%s  %s%s%s%s", idstr ? idstr : "",
		    te->basename, modestr, targetlnk ? " -> ": "",
		    targetlnk ? targetlnk : "")) == NULL) {
			fsl_free(idstr);
			fsl_free(targetlnk);
			return RC(FSL_RC_RANGE, "%s", "fsl_mprintf");
		}
		fsl_free(idstr);
		fsl_free(targetlnk);
		rc = formatln(&wcstr, &wstrlen, line, view->ncols, 0);
		if (rc) {
			fsl_free(line);
			break;
		}
		if (n == s->selected_idx) {
			if (view->active)
				wattr_on(view->window, A_REVERSE, NULL);
			s->selected_entry = te;
		}
		if (s->colour && (match = fsl_list_index_of(&s->colours, line,
		    match_line)) != -1)
			c = s->colours.list[match];
		else
			c = NULL;
		if (c)
			wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
		waddwstr(view->window, wcstr);
		if (c)
			wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
		if (wstrlen < view->ncols - 1)
			waddch(view->window, '\n');
		if (n == s->selected_idx && view->active)
			wattr_off(view->window, A_REVERSE, NULL);
		fsl_free(line);
		fsl_free(wcstr);
		wcstr = NULL;
		++n;
		++s->ndisplayed;
		s->last_entry_onscreen = te;
		if (--limit <= 0)
			break;
	}

	return rc;
}

static int
tree_entry_get_symlink_target(char **targetlnk, struct fnc_tree_entry *te)
{
	struct stat	 s;
	fsl_buffer	 fb = fsl_buffer_empty;
	char		*buf = NULL;
	ssize_t		 nbytes, bufsz;
	int		 rc = 0;

	*targetlnk = NULL;

	fsl_file_canonical_name2(fcli_cx()->ckout.dir, te->path, &fb, false);
	if (lstat(fsl_buffer_cstr(&fb), &s) == -1) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_ACCESS), "lstat(%s)",
		    fsl_buffer_cstr(&fb));
		goto end;
	}

	bufsz = s.st_size ? (s.st_size + 1 /* NUL */) : PATH_MAX;
	buf = fsl_malloc(bufsz);
	if (buf == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "fsl_malloc");
		goto end;
	}

	nbytes = readlink(fsl_buffer_cstr(&fb), buf, bufsz);
	if (nbytes == -1) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_IO), "readlink(%s)",
		    fsl_buffer_cstr(&fb));
		goto end;
	}
	buf[nbytes] = '\0';	/* readlink() does _not_ NUL terminate */
end:
	fsl_buffer_clear(&fb);
	if (rc)
		fsl_free(buf);
	*targetlnk = buf;
	return rc;
	/*
	 * XXX Not sure if we should rely on fossil(1) populating symlinks
	 * with the path of the target source file to obtain the target link.
	 */
	/* fsl_cx		*f = fcli_cx(); */
	/* fsl_buffer	 blob = fsl_buffer_empty; */
	/* fsl_id_t	 rid; */

	/* if (!((te->mode & (S_IFDIR | S_IFLNK)) == S_IFLNK)) */
	/* 	return RC(FSL_RC_TYPE, "file not symlink [%s]", te->path); */
	/* rc = fsl_sym_to_rid(f, te->uuid, FSL_SATYPE_ANY, &rid); */
	/* if (!rc) */
	/* 	rc = fsl_content_blob(f, rid, &blob); */
	/* if (rc) */
	/* 	return rc; */

	/* *targetlnk = fsl_strdup(fsl_buffer_str(&blob)); */
	/* fsl_buffer_clear(&blob); */
}

static int
tree_input_handler(struct fnc_view **new_view, struct fnc_view *view, int ch)
{
	struct fnc_view			*timeline_view/*, *branch_view */;
	struct fnc_tree_view_state	*s = &view->state.tree;
	struct fnc_tree_entry		*te;
	int				 n, start_col = 0, rc = 0;

	switch (ch) {
	case 'c':
		s->colour = !s->colour;
		break;
	case 'i':
		s->show_id = !s->show_id;
		break;
	case 't':
		if (!s->selected_entry)
			break;
		if (view_is_parent(view))
			start_col = view_split_start_col(view->start_col);
		rc = timeline_tree_entry(&timeline_view, start_col, s);
		view->active = false;
		timeline_view->active = true;
		if (view_is_parent(view)) {
			rc = view_close_child(view);
			if (rc)
				return rc;
			view_set_child(view, timeline_view);
			view->focus_child = true;
		} else
			*new_view = timeline_view;
		break;
	case 'g':
		if (!fnc_home(view))
			break;
		/* FALL THROUGH */
	case KEY_HOME:
		s->selected_idx = 0;
		if (s->tree == s->root)
			s->first_entry_onscreen = &s->tree->entries[0];
		else
			s->first_entry_onscreen = NULL;
		break;
	case KEY_END:
	case 'G':
		s->selected_idx = 0;
		te = &s->tree->entries[s->tree->nentries - 1];
		for (n = 0; n < view->nlines - 3; ++n) {
			if (te == NULL) {
				if(s->tree != s->root) {
					s->first_entry_onscreen = NULL;
					++n;
				}
				break;
			}
			s->first_entry_onscreen = te;
			te = get_tree_entry(s->tree, te->idx - 1);
		}
		if (n > 0)
			s->selected_idx = n - 1;
		break;
	case KEY_UP:
	case 'k':
		if (s->selected_idx > 0) {
			--s->selected_idx;
			break;
		}
		tree_scroll_up(s, 1);
		break;
	case KEY_PPAGE:
	case CTRL('b'):
		if (s->tree == s->root) {
			if (&s->tree->entries[0] == s->first_entry_onscreen)
				s->selected_idx = 0;
		} else {
			if (s->first_entry_onscreen == NULL)
				s->selected_idx = 0;
		}
		tree_scroll_up(s, MAX(0, view->nlines - 3));
		break;
	case KEY_DOWN:
	case 'j':
		if (s->selected_idx < s->ndisplayed - 1) {
			++s->selected_idx;
			break;
		}
		if (get_tree_entry(s->tree, s->last_entry_onscreen->idx + 1)
		    == NULL)
			break;	/* Reached last entry. */
		tree_scroll_down(s, 1);
		break;
	case KEY_NPAGE:
	case CTRL('f'):
		if (get_tree_entry(s->tree, s->last_entry_onscreen->idx + 1)
		    == NULL) {
			/*
			 * When the last entry on screen is the last node in the
			 * tree move cursor to it instead of scrolling the view.
			 */
			if (s->selected_idx < s->ndisplayed - 1)
				s->selected_idx = s->ndisplayed - 1;
			break;
		}
		tree_scroll_down(s, view->nlines - 3);
		break;
	case KEY_BACKSPACE:
	case KEY_ENTER:
	case KEY_LEFT:
	case KEY_RIGHT:
	case '\r':
	case 'h':
	case 'l':
		/*
		 * h/backspace/arrow-left: return to parent dir irrespective
		 * of selected entry type (unless already at root).
		 * l/arrow-right: move into selected dir entry.
		 */
		if (ch != KEY_RIGHT && ch != 'l' && (s->selected_entry == NULL
		    || ch == 'h' || ch == KEY_BACKSPACE || ch == KEY_LEFT)) {
			struct fnc_parent_tree	*parent;
			/* h/backspace/left-arrow pressed or ".." selected. */
			if (s->tree == s->root)
				break;
			parent = TAILQ_FIRST(&s->parents);
			TAILQ_REMOVE(&s->parents, parent,
			    entry);
			fnc_object_tree_close(s->tree);
			s->tree = parent->tree;
			s->first_entry_onscreen = parent->first_entry_onscreen;
			s->selected_entry = parent->selected_entry;
			s->selected_idx = parent->selected_idx;
			fsl_free(parent);
		} else if (s->selected_entry != NULL &&
		    S_ISDIR(s->selected_entry->mode)) {
			struct fnc_tree_object	*subtree = NULL;
			rc = tree_builder(s->repo, &subtree,
			    s->selected_entry->path);
			if (rc)
				break;
			rc = visit_subtree(s, subtree);
			if (rc) {
				fnc_object_tree_close(subtree);
				break;
			}
		} else if (S_ISREG(s->selected_entry->mode)) {
			struct fnc_view *blame_view;
			int start_col = view_is_parent(view) ?
			    view_split_start_col(view->start_col) : 0;

			rc = blame_tree_entry(&blame_view, start_col,
			    s->selected_entry, &s->parents, s->commit_id);
			if (rc)
				break;
			view->active = false;
			blame_view->active = true;
			if (view_is_parent(view)) {
				rc = view_close_child(view);
				if (rc)
					return rc;
				view_set_child(view, blame_view);
				view->focus_child = true;
			} else
				*new_view = blame_view;
		}
		break;
	case KEY_RESIZE:
		if (view->nlines >= 4 && s->selected_idx >= view->nlines - 3)
			s->selected_idx = view->nlines - 4;
		break;
	default:
		break;
	}

	return rc;
}

static int
timeline_tree_entry(struct fnc_view **new_view, int start_col,
    struct fnc_tree_view_state *s)
{
	struct fnc_view	*timeline_view;
	char		*path;
	int		 rc = 0;

	*new_view = NULL;

	timeline_view = view_open(0, 0, 0, start_col, FNC_VIEW_TIMELINE);
	if (timeline_view == NULL)
		return RC(FSL_RC_ERROR, "%s", "view_open");

	/* Construct repository relative path for timeline query. */
	rc = tree_entry_path(&path, &s->parents, s->selected_entry);
	if (rc)
		return rc;

	rc = open_timeline_view(timeline_view, s->rid, path);
	if (rc)
		view_close(timeline_view);
	else
		*new_view = timeline_view;

	fsl_free(path);
	return rc;
}

static void
tree_scroll_up(struct fnc_tree_view_state *s, int maxscroll)
{
	struct fnc_tree_entry	*te;
	int			 isroot, i = 0;

	isroot = s->tree == s->root;

	if (s->first_entry_onscreen == NULL)
		return;

	te = get_tree_entry(s->tree, s->first_entry_onscreen->idx - 1);
	while (i++ < maxscroll) {
		if (te == NULL) {
			if (!isroot)
				s->first_entry_onscreen = NULL;
			break;
		}
		s->first_entry_onscreen = te;
		te = get_tree_entry(s->tree, te->idx - 1);
	}
}

static void
tree_scroll_down(struct fnc_tree_view_state *s, int maxscroll)
{
	struct fnc_tree_entry	*next, *last;
	int			 n = 0;

	if (s->first_entry_onscreen)
		next = get_tree_entry(s->tree,
		    s->first_entry_onscreen->idx + 1);
	else
		next = &s->tree->entries[0];

	last = s->last_entry_onscreen;
	while (next && last && n++ < maxscroll) {
		last = get_tree_entry(s->tree, last->idx + 1);
		if (last) {
			s->first_entry_onscreen = next;
			next = get_tree_entry(s->tree, next->idx + 1);
		}
	}
}

static int
visit_subtree(struct fnc_tree_view_state *s, struct fnc_tree_object *subtree)
{
	struct fnc_parent_tree	*parent;

	parent = calloc(1, sizeof(*parent));
	if (parent == NULL)
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR), "%s", "calloc");

	parent->tree = s->tree;
	parent->first_entry_onscreen = s->first_entry_onscreen;
	parent->selected_entry = s->selected_entry;
	parent->selected_idx = s->selected_idx;
	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
	s->tree = subtree;
	s->selected_idx = 0;
	s->first_entry_onscreen = NULL;

	return 0;
}

static int
blame_tree_entry(struct fnc_view **new_view, int start_col,
    struct fnc_tree_entry *te, struct fnc_parent_trees *parents,
    fsl_uuid_str commit_id)
{
	struct fnc_view	*blame_view;
	char		*path;
	int		 rc = 0;

	*new_view = NULL;

	rc = tree_entry_path(&path, parents, te);
	if (rc)
		return rc;

	blame_view = view_open(0, 0, 0, start_col, FNC_VIEW_BLAME);
	if (blame_view == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "view_open");
		goto end;
	}

	rc = open_blame_view(blame_view, path, commit_id, 0, 0);
	if (rc)
		view_close(blame_view);
	else
		*new_view = blame_view;
end:
	fsl_free(path);
	return rc;
}

static int
tree_search_init(struct fnc_view *view)
{
	struct fnc_tree_view_state *s = &view->state.tree;

	s->matched_entry = NULL;
	return 0;
}

static int
tree_search_next(struct fnc_view *view)
{
	struct fnc_tree_view_state	*s = &view->state.tree;
	struct fnc_tree_entry		*te = NULL;
	int				 rc = 0;

	if (view->searching == SEARCH_DONE) {
		view->search_status = SEARCH_CONTINUE;
		return rc;
	}

	if (s->matched_entry) {
		if (view->searching == SEARCH_FORWARD) {
			if (s->selected_entry)
				te = &s->tree->entries[s->selected_entry->idx
				    + 1];
			else
				te = &s->tree->entries[0];
		} else {
			if (s->selected_entry == NULL)
				te = &s->tree->entries[s->tree->nentries - 1];
			else
				te = &s->tree->entries[s->selected_entry->idx
				    - 1];
		}
	} else {
		if (view->searching == SEARCH_FORWARD)
			te = &s->tree->entries[0];
		else
			te = &s->tree->entries[s->tree->nentries - 1];
	}

	while (1) {
		if (te == NULL) {
			if (s->matched_entry == NULL) {
				view->search_status = SEARCH_CONTINUE;
				return rc;
			}
			if (view->searching == SEARCH_FORWARD)
				te = &s->tree->entries[0];
			else
				te = &s->tree->entries[s->tree->nentries - 1];
		}

		if (match_tree_entry(te, &view->regex)) {
			view->search_status = SEARCH_CONTINUE;
			s->matched_entry = te;
			break;
		}

		if (view->searching == SEARCH_FORWARD)
			te = &s->tree->entries[te->idx + 1];
		else
			te = &s->tree->entries[te->idx - 1];
	}

	if (s->matched_entry) {
		s->first_entry_onscreen = s->matched_entry;
		s->selected_idx = 0;
	}

	return rc;
}

static int
match_tree_entry(struct fnc_tree_entry *te, regex_t *regex)
{
	regmatch_t regmatch;

	return regexec(regex, te->basename, 1, &regmatch, 0) == 0;
}

struct fnc_tree_entry *
get_tree_entry(struct fnc_tree_object *tree, int i)
{
	if (i < 0 || i >= tree->nentries)
		return NULL;

	return &tree->entries[i];
}

/* Find entry in tree with basename name. */
static struct fnc_tree_entry *
find_tree_entry(struct fnc_tree_object *tree, const char *name, size_t len)
{
	int	idx;

	/* Entries are sorted in strcmp() order. */
	for (idx = 0; idx < tree->nentries; ++idx) {
		struct fnc_tree_entry *te = &tree->entries[idx];
		int cmp = strncmp(te->basename, name, len);
		if (cmp < 0)
			continue;
		if (cmp > 0)
			break;
		if (te->basename[len] == '\0')
			return te;
	}
	return NULL;
}

static int
close_tree_view(struct fnc_view *view)
{
	struct fnc_tree_view_state	*s = &view->state.tree;
	struct fsl_list_state		 st = { FNC_COLOUR_OBJ };

	fsl_list_clear(&s->colours, fsl_list_object_free, &st);

	fsl_free(s->tree_label);
	s->tree_label = NULL;
	fsl_free(s->commit_id);
	s->commit_id = NULL;

	while (!TAILQ_EMPTY(&s->parents)) {
		struct fnc_parent_tree *parent;
		parent = TAILQ_FIRST(&s->parents);
		TAILQ_REMOVE(&s->parents, parent, entry);
		if (parent->tree != s->root)
			fnc_object_tree_close(parent->tree);
		fsl_free(parent);

	}

	if (s->tree != NULL && s->tree != s->root)
		fnc_object_tree_close(s->tree);
	if (s->root)
		fnc_object_tree_close(s->root);
	if (s->repo)
		fnc_close_repository_tree(s->repo);

	return 0;
}

static void
fnc_object_tree_close(struct fnc_tree_object *tree)
{
	int	idx;

	for (idx = 0; idx < tree->nentries; ++idx) {
		fsl_free(tree->entries[idx].basename);
		fsl_free(tree->entries[idx].path);
		fsl_free(tree->entries[idx].uuid);
	}

	fsl_free(tree->entries);
	fsl_free(tree);
}

static void
fnc_close_repository_tree(struct fnc_repository_tree *repo)
{
	struct fnc_repo_tree_node *next, *tn;

	tn = repo->head;
	while (tn) {
		next = tn->next;
		fsl_free(tn);
		tn = next;
	}
	fsl_free(repo);
}

static int
view_close_child(struct fnc_view *view)
{
	int	rc = 0;

	if (view->child == NULL)
		return rc;

	rc = view_close(view->child);
	view->child = NULL;

	return rc;
}

static void
view_set_child(struct fnc_view *view, struct fnc_view *child)
{
	view->child = child;
	child->parent = view;
}

static int
set_colours(fsl_list *s, enum fnc_view_id vid)
{
	struct fnc_colour	 *colour;
	const char		**regexp = NULL;
	const char		 *regexp_blame[] = {"^"};
	const char		 *regexp_timeline[] = {"^$", "^$", "^$"};
	const char		 *regexp_tree[] = {"@$", "/$", "\\*$", "^$"};
	const char		 *regexp_diff[] = {
				    "^((checkin|wiki|ticket|technote) "
				    "[0-9a-f]|hash [+-] |\\[[+~>-]] |"
				    "[+-]{3} )", "^user:", "^date:", "^tags:",
				    "^-", "^\\+", "^@@"
				  };
	int			  pairs_diff[][2] = {
				    {FNC_DIFF_META, COLOR_GREEN},
				    {FNC_USER_STR, COLOR_CYAN},
				    {FNC_DATE_STR, COLOR_YELLOW},
				    {FNC_TAGS_STR, COLOR_MAGENTA},
				    {FNC_DIFF_MINUS, COLOR_MAGENTA},
				    {FNC_DIFF_PLUS, COLOR_CYAN},
				    {FNC_DIFF_CHNK, COLOR_YELLOW}
				  };
	int			  pairs_tree[][2] = {
				    {FNC_TREE_LINK, COLOR_MAGENTA},
				    {FNC_TREE_DIR, COLOR_CYAN},
				    {FNC_TREE_EXEC, COLOR_GREEN},
				    {FNC_COMMIT_ID, COLOR_GREEN}
				  };
	int			  pairs_timeline[][2] = {
				    {FNC_COMMIT_ID, COLOR_GREEN},
				    {FNC_USER_STR, COLOR_CYAN},
				    {FNC_DATE_STR, COLOR_YELLOW}
				  };
	int			  pairs_blame[][2] = {
				    {FNC_COMMIT_ID, COLOR_GREEN}
				  };
	int			(*pairs)[2], rc = 0;
	fsl_size_t		  idx, n;

	switch (vid) {
	case FNC_VIEW_DIFF:
		n = nitems(regexp_diff);
		regexp = regexp_diff;
		pairs = pairs_diff;
		break;
	case FNC_VIEW_TREE:
		n = nitems(regexp_tree);
		regexp = regexp_tree;
		pairs = pairs_tree;
		break;
	case FNC_VIEW_TIMELINE:
		n = nitems(regexp_timeline);
		regexp = regexp_timeline;
		pairs = pairs_timeline;
		break;
	case FNC_VIEW_BLAME:
		n = nitems(regexp_blame);
		regexp = regexp_blame;
		pairs = pairs_blame;
		break;
	default:
		return RC(FSL_RC_TYPE, "%s", "invalid fnc_view_id");
	}

	for (idx = 0; idx < n; ++idx) {
		colour = fsl_malloc(sizeof(*colour));
		if (colour == NULL)
			return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
			    "%s", "fsl_malloc");

		rc = regcomp(&colour->regex, regexp[idx],
		    REG_EXTENDED | REG_NEWLINE | REG_NOSUB);
		if (rc) {
			static char regerr[512];
			regerror(rc, &colour->regex, regerr, sizeof(regerr));
			fsl_free(colour);
			return RC(FSL_RC_ERROR, "regcomp(%s) -> %s",
			    regexp[idx], regerr);
		}

		colour->scheme = pairs[idx][0];
		init_pair(colour->scheme, pairs[idx][1], -1);
		fsl_list_append(s, colour);
	}

	return rc;
}

struct fnc_colour *
get_colour(fsl_list *colours, int scheme)
{
	struct fnc_colour	cs;
	int			match = -1;

	cs.scheme = scheme;
	match = fsl_list_index_of(colours, &cs, match_colour);

	if (match != -1)
		return colours->list[match];

	return NULL;
}

static int
match_colour(const void *target, const void *key)
{
	struct fnc_colour *c = (struct fnc_colour *)key;
	struct fnc_colour *t = (struct fnc_colour *)target;

	return (c->scheme == t->scheme) ? 0 : 1;
}

/*
 * Emulate vim(1) gg: User has 1 sec to follow first 'g' keypress with another.
 */
static bool
fnc_home(struct fnc_view *view)
{
	bool	home = true;

	halfdelay(10);	/* Block for 1 second, then return ERR. */
	if (wgetch(view->window) != 'g')
		home = false;
	cbreak();	/* Return to blocking mode on user input. */

	return home;
}

static int
cmd_blame(fcli_command const *argv)
{
	fsl_cx		*f = fcli_cx();
	struct fnc_view	*view;
	char		*path = NULL;
	fsl_uuid_str	 commit_id = NULL;
	fsl_id_t	 tip = 0, rid = 0;
	int		 nlimit = 0, rc = 0;

	rc = fcli_process_flags(argv->flags);
	if (rc || (rc = fcli_has_unused_flags(false)))
		goto end;
	if (!fcli_next_arg(false)) {
		rc = RC(FSL_RC_MISSING_INFO,
		    "%s blame requires versioned file path", fcli_progname());
		goto end;
	}

	if (fnc_init.nrecords.zlimit) {
		char *n = (char *)fnc_init.nrecords.zlimit;
		bool timed;
		if (n[fsl_strlen(n) - 1] == 's') {
			n[fsl_strlen(n) - 1] = '\0';
			timed = true;
		}
		if ((rc = strtonumcheck(&nlimit, n, INT_MIN, INT_MAX)))
			goto end;
		if (timed)
			nlimit *= -1;
	}

	if (fnc_init.sym || fnc_init.reverse) {
		if (fnc_init.reverse) {
			if (!fnc_init.sym) {
				rc = RC(FSL_RC_MISSING_INFO,
				    "%s blame --reverse requires --commit",
				    fcli_progname());
				goto end;
			}
			rc = fsl_sym_to_rid(f, "tip", FSL_SATYPE_CHECKIN, &tip);
			if (rc)
				goto end;
		}
		rc = fsl_sym_to_rid(f, fnc_init.sym, FSL_SATYPE_CHECKIN, &rid);
		if (rc)
			goto end;
	} else if (!fnc_init.sym)
		fsl_ckout_version_info(f, &rid, NULL);

	rc = map_repo_path(&path);
	if (rc) {
		if (rc != FSL_RC_NOT_FOUND || !fnc_init.sym)
			goto end;
		/* Path may be valid in repository tree of specified commit. */
		rc = 0;
		fcli_err_reset();
	}

	commit_id = fsl_rid_to_uuid(f, rid);
	if (rc || (path[0] == '/' && path[1] == '\0')) {
		rc = rc ? rc : RC(FSL_RC_MISSING_INFO,
		    "%s blame requires versioned file path", fcli_progname());
		goto end;
	}

	init_curses();

	view = view_open(0, 0, 0, 0, FNC_VIEW_BLAME);
	if (view == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", view_open);
		goto end;
	}

	rc = open_blame_view(view, path, commit_id, tip, nlimit);
	if (rc)
		goto end;
	rc = view_loop(view);
end:
	fsl_free(path);
	fsl_free(commit_id);
	return rc;
}

static int
open_blame_view(struct fnc_view *view, char *path, fsl_uuid_str commit_id,
    fsl_id_t tip, int nlimit)
{
	struct fnc_blame_view_state	*s = &view->state.blame;
	int				 rc = 0;

	CONCAT(STAILQ, _INIT)(&s->blamed_commits);

	s->path = fsl_strdup(path);
	if (s->path == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_strdup");

	rc = fnc_commit_qid_alloc(&s->blamed_commit, commit_id);
	if (rc) {
		fsl_free(s->path);
		return rc;
	}

	CONCAT(STAILQ, _INSERT_HEAD)(&s->blamed_commits, s->blamed_commit,
	    entry);
	memset(&s->blame, 0, sizeof(s->blame));
	s->first_line_onscreen = 1;
	s->last_line_onscreen = view->nlines;
	s->selected_line = 1;
	s->blame_complete = false;
	s->commit_id = commit_id;
	s->blame.origin = tip;
	s->blame.nlimit = nlimit;
	s->spin_idx = 0;
	s->colour = !fnc_init.nocolour && has_colors();

	if (s->colour) {
		rc = set_colours(&s->colours, FNC_VIEW_BLAME);
		if (rc)
			return rc;
	}

	view->show = show_blame_view;
	view->input = blame_input_handler;
	view->close = close_blame_view;
	view->search_init = blame_search_init;
	view->search_next = blame_search_next;

	return run_blame(view);
}

static int
run_blame(struct fnc_view *view)
{
	fsl_cx				*f = fcli_cx();
	struct fnc_blame_view_state	*s = &view->state.blame;
	struct fnc_blame		*blame = &s->blame;
	fsl_deck			 d = fsl_deck_empty;
	fsl_buffer			 buf = fsl_buffer_empty;
	fsl_annotate_opt		*opt = NULL;
	const fsl_card_F		*cf;
	char				*filepath = NULL;
	char				*master = NULL, *root = NULL;
	int				 rc = 0;

	/*
	 * Trim prefixed '/' if path has been processed by map_repo_path(),
	 * which only occurs when the -c option has not been passed.
	 * XXX This slash trimming is cumbersome; we should not prefix a slash
	 * in map_repo_path() as we only want the slash for displaying an
	 * absolute-repository-relative path, so we should prefix it only then.
	 */
	filepath = s->path[0] != '/' ? s->path : s->path + 1;

	rc = fsl_deck_load_sym(f, &d, s->blamed_commit->id, FSL_SATYPE_CHECKIN);
	if (rc)
		goto end;

	cf = fsl_deck_F_search(&d, filepath);
	if (cf == NULL) {
		rc = RC(FSL_RC_NOT_FOUND, "'%s' not found in tree [%s]",
		    filepath, s->blamed_commit->id);
		goto end;
	}
	rc = fsl_card_F_content(f, cf, &buf);
	if (rc)
		goto end;

	/*
	 * We load f with the actual file content to map line offsets so we
	 * accurately find tokens when running a search.
	 */
	blame->f = tmpfile();
	if (blame->f == NULL) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_IO), "%s", "tmpfile");
		goto end;
	}

	opt = &blame->thread_cx.blame_opt;
	opt->filename = fsl_strdup(filepath);
	fcli_fax((char *)opt->filename);
	rc = fsl_sym_to_rid(f, s->blamed_commit->id, FSL_SATYPE_CHECKIN,
	    &opt->versionRid);
	if (rc)
		goto end;
	opt->originRid = blame->origin;    /* tip when -r is passed */
	if (blame->nlimit < 0)
		opt->limitMs = abs(blame->nlimit) * 1000;
	else
		opt->limitVersions = blame->nlimit;
	opt->out = blame_cb;
	opt->outState = &blame->cb_cx;

	rc = fnc_dump_buffer_to_file(&blame->filesz, &blame->nlines,
	    &blame->line_offsets, blame->f, &buf);
	if (rc)
		goto end;
	if (blame->nlines == 0) {
		s->blame_complete = true;
		goto end;
	}

	/* Don't include EOF \n in blame line count. */
	if (blame->line_offsets[blame->nlines - 1] == blame->filesz)
		--blame->nlines;

	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
	if (blame->lines == NULL) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_ERROR), "%s", "calloc");
		goto end;
	}

	master = fsl_config_get_text(f, FSL_CONFDB_REPO, "main-branch", NULL);
	if (master == NULL) {
		master = fsl_strdup("trunk");
		if (master == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
			goto end;
		}
	}
	root = fsl_mprintf("root:%s", master);
	rc = fsl_sym_to_uuid(f, root, FSL_SATYPE_CHECKIN,
	    &blame->cb_cx.root_commit, NULL);
	if (rc) {
		rc = RC(rc, "%s", "fsl_sym_to_uuid");
		goto end;
	}

	blame->cb_cx.view = view;
	blame->cb_cx.lines = blame->lines;
	blame->cb_cx.nlines = blame->nlines;
	blame->cb_cx.commit_id = fsl_strdup(s->blamed_commit->id);
	if (blame->cb_cx.commit_id == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		goto end;
	}
	blame->cb_cx.quit = &s->done;

	blame->thread_cx.path = s->path;
	blame->thread_cx.cb_cx = &blame->cb_cx;
	blame->thread_cx.complete = &s->blame_complete;
	blame->thread_cx.cancel_cb = cancel_blame;
	blame->thread_cx.cancel_cx = &s->done;
	s->blame_complete = false;

	if (s->first_line_onscreen + view->nlines - 1 > blame->nlines) {
		s->first_line_onscreen = 1;
		s->last_line_onscreen = view->nlines;
		s->selected_line = 1;
	}

end:
	fsl_free(master);
	fsl_free(root);
	fsl_deck_finalize(&d);
	fsl_buffer_clear(&buf);
	if (rc)
		stop_blame(blame);
	return rc;
}

/*
 * Write file content in buf to out file. Record the number of lines in the file
 * in nlines, and total bytes written in filesz. Assign byte offsets of each
 * line to the dynamically allocated *line_offsets, which must eventually be
 * disposed of by the caller. Flush and rewind out file when done.
 */
static int
fnc_dump_buffer_to_file(off_t *filesz, int *nlines, off_t **line_offsets,
    FILE *out, fsl_buffer *buf)
{
	off_t		 off = 0, total_len = 0;
	size_t		 len, n, i = 0, nalloc = 0;
	int		 rc = 0;
	const int	 alloc_chunksz = MIN(512, BUFSIZ);

	if (line_offsets)
		*line_offsets = NULL;
	if (filesz)
		*filesz = 0;
	if (nlines)
		*nlines = 0;

	len = buf->used;
	if (len == 0)
		return RC(FSL_RC_SIZE_MISMATCH, "%s",
		    "fnc_dump_buffer_to_file");
	if (nlines) {
		if (line_offsets && *line_offsets == NULL) {
			*nlines = 1;
			nalloc = alloc_chunksz;
			*line_offsets = calloc(nalloc, sizeof(**line_offsets));
			if (*line_offsets == NULL)
				return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
				    "%s", "calloc");

			/* Consume the first line. */
			while (i < len) {
				if (buf->mem[i] == '\n')
					break;
				++i;
			}
		}
		/* Scan '\n' offsets. */
		while (i < len) {
			if (buf->mem[i] != '\n') {
				++i;
				continue;
			}
			++(*nlines);
			if (line_offsets && nalloc < (size_t)*nlines) {
				size_t n, oldsz, newsz;
				off_t *new = NULL;

				n = *nlines + alloc_chunksz;
				oldsz = nalloc * sizeof(**line_offsets);
				newsz = n * sizeof(**line_offsets);
				if (newsz <= oldsz) {
					size_t b = oldsz - newsz;
					if (b < oldsz / 2 &&
					    b < (size_t)getpagesize()) {
						memset((char *)*line_offsets
						    + newsz, 0, b);
						goto allocated;
					}
				}
				new = fsl_realloc(*line_offsets, newsz);
				if (new == NULL) {
					fsl_free(*line_offsets);
					*line_offsets = NULL;
					return RC(FSL_RC_ERROR, "%s",
					    "fsl_realloc");
				}
				*line_offsets = new;
allocated:
				nalloc = n;
			}
			if (line_offsets) {
				off = total_len + i + 1;
				(*line_offsets)[*nlines - 1] = off;
			}
			++i;
		}
	}
	n = fwrite(buf->mem, 1, len, out);
	if (n != len)
		return RC(ferror(out) ? fsl_errno_to_rc(errno, FSL_RC_IO)
		    : FSL_RC_IO, "%s", "fwrite");
	total_len += len;

	if (fflush(out) != 0)
		return RC(fsl_errno_to_rc(errno, FSL_RC_IO), "%s", "fflush");
	rewind(out);

	if (filesz)
		*filesz = total_len;

	return rc;
}

static int
show_blame_view(struct fnc_view *view)
{
	struct fnc_blame_view_state	*s = &view->state.blame;
	int				 rc = 0;

	if (!s->blame.thread_id && !s->blame_complete) {
		rc = pthread_create(&s->blame.thread_id, NULL, blame_thread,
		    &s->blame.thread_cx);
		if (rc)
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_create");

		halfdelay(1);	/* Fast refresh while annotating.  */
	}

	if (s->blame_complete)
		cbreak();	/* Return to blocking mode. */

	rc = draw_blame(view);
	draw_vborder(view);

	return rc;
}

static void *
blame_thread(void *state)
{
	struct fnc_blame_thread_cx	*cx = state;
	int				 rc0, rc;

	rc = block_main_thread_signals();
	if (rc)
		return (void *)(intptr_t)rc;

	rc = fsl_annotate(fcli_cx(), &cx->blame_opt);
	if (rc && fsl_cx_err_get_e(fcli_cx())->code == FSL_RC_BREAK) {
		fcli_err_reset();
		rc = 0;
	}

	rc0 = pthread_mutex_lock(&fnc_mutex);
	if (rc0)
		return (void *)(intptr_t)RC(fsl_errno_to_rc(rc0, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_lock");

	*cx->complete = true;

	rc0 = pthread_mutex_unlock(&fnc_mutex);
	if (rc0 && !rc)
		rc = RC(fsl_errno_to_rc(rc0, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_unlock");

	return (void *)(intptr_t)rc;
}

static int
blame_cb(void *state, fsl_annotate_opt const * const opt,
    fsl_annotate_step const * const step)
{
	struct fnc_blame_cb_cx	*cx = state;
	struct fnc_blame_line	*line;
	int			 rc = 0;

	rc = pthread_mutex_lock(&fnc_mutex);
	if (rc)
		return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_lock");

	if (*cx->quit) {
		rc = fcli_err_set(FSL_RC_BREAK, "user quit");
		goto end;
	}

	line = &cx->lines[step->lineNumber - 1];
	if (line->annotated)
		goto end;

	if (step->mtime) {
		line->id = fsl_strdup(step->versionHash);
		if (line->id == NULL) {
			rc = RC(FSL_RC_ERROR, "%s", fsl_strdup);
			goto end;
		}
		line->annotated = true;
	} else
		line->id = NULL;

	/* -r can return lines with no version, so use root check-in. */
	if (opt->originRid && !line->id) {
		line->id = fsl_strdup(cx->root_commit);
		line->annotated = true;
	}

	++cx->nlines;
end:
	rc = pthread_mutex_unlock(&fnc_mutex);
	if (rc)
		rc = RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_unlock");
	return rc;
}

static int
draw_blame(struct fnc_view *view)
{
	struct fnc_blame_view_state	*s = &view->state.blame;
	struct fnc_blame		*blame = &s->blame;
	struct fnc_blame_line		*blame_line;
	regmatch_t			*regmatch = &view->regmatch;
	struct fnc_colour		*c = NULL;
	wchar_t				*wcstr;
	char				*line = NULL;
	fsl_uuid_str			 prev_id = NULL, id_str = NULL;
	ssize_t				 linelen;
	size_t				 linesz = 0;
	int				 width, lineno = 0, nprinted = 0;
	int				 rc = 0;
	const int			 idfield = 11;  /* Prefix + space. */

	id_str = fsl_strdup(s->blamed_commit->id);
	if (id_str == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_strdup");

	rewind(blame->f);
	werase(view->window);

	if ((line = fsl_mprintf("checkin %s", id_str)) == NULL) {
		rc = RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
		    "%s", "fsl_mprintf");
		fsl_free(id_str);
		return rc;
	}

	rc = formatln(&wcstr, &width, line, view->ncols, 0);
	fsl_free(line);
	line = NULL;
	if (rc)
		return rc;
	if (screen_is_shared(view))
		wstandout(view->window);
	if (s->colour)
		c = get_colour(&s->colours, FNC_COMMIT_ID);
	if (c)
		wattr_on(view->window, COLOR_PAIR(c->scheme), NULL);
	waddwstr(view->window, wcstr);
	if (c)
		wattr_off(view->window, COLOR_PAIR(c->scheme), NULL);
	if (screen_is_shared(view))
		wstandend(view->window);
	fsl_free(wcstr);
	wcstr = NULL;
	if (width < view->ncols - 1)
		waddch(view->window, '\n');

	if ((line = fsl_mprintf("[%d/%d] %s%s%s %c",
	    s->first_line_onscreen - 1 + s->selected_line, blame->nlines,
	    s->blame_complete ? "" : "annotating... ",
	    fnc_init.sym ? "/" : "", s->path,
	    s->blame_complete ? ' ' : SPINNER[s->spin_idx])) == NULL) {
		fsl_free(id_str);
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR),
		    "%s", "fsl_mprintf");
	}
	if (SPINNER[++s->spin_idx] == '\0')
		s->spin_idx = 0;
	fsl_free(id_str);
	rc = formatln(&wcstr, &width, line, view->ncols, 0);
	fsl_free(line);
	line = NULL;
	if (rc)
		return rc;
	waddwstr(view->window, wcstr);
	fsl_free(wcstr);
	wcstr = NULL;
	if (width < view->ncols - 1)
		waddch(view->window, '\n');

	s->eof = false;
	while (nprinted < view->nlines - 2) {
		linelen = getline(&line, &linesz, blame->f);
		if (linelen == -1) {
			if (feof(blame->f)) {
				s->eof = true;
				break;
			}
			fsl_free(line);
			return RC(ferror(blame->f) ? fsl_errno_to_rc(errno,
			    FSL_RC_IO) : FSL_RC_IO, "%s", "getline");
		}
		if (++lineno < s->first_line_onscreen)
			continue;

		if (view->active && nprinted == s->selected_line - 1)
			wattr_on(view->window, A_REVERSE, NULL);

		if (blame->nlines > 0) {
			blame_line = &blame->lines[lineno - 1];
			if (blame_line->annotated && prev_id &&
			    fsl_uuidcmp(prev_id, blame_line->id) == 0 &&
			    !(view->active &&
			    nprinted == s->selected_line - 1)) {
				waddstr(view->window, "          ");
			} else if (blame_line->annotated) {
				char *id_str;
				id_str = fsl_strndup(blame_line->id,
				    idfield - 1);
				if (id_str == NULL) {
					fsl_free(line);
					return RC(FSL_RC_ERROR, "%s",
					    "fsl_strdup");
				}
				if (s->colour)
					c = get_colour(&s->colours,
					    FNC_COMMIT_ID);
				if (c)
					wattr_on(view->window,
					    COLOR_PAIR(c->scheme), NULL);
				wprintw(view->window, "%.*s", idfield - 1,
				    id_str);
				if (c)
					wattr_off(view->window,
					    COLOR_PAIR(c->scheme), NULL);
				fsl_free(id_str);
				prev_id = blame_line->id;
			} else {
				waddstr(view->window, "..........");
				prev_id = NULL;
			}
		} else {
			waddstr(view->window, "..........");
			prev_id = NULL;
		}

		if (view->active && nprinted == s->selected_line - 1)
			wattr_off(view->window, A_REVERSE, NULL);
		waddstr(view->window, " ");

		if (view->ncols <= idfield) {
			width = idfield;
			wcstr = wcsdup(L"");
			if (wcstr == NULL) {
				rc = RC(fsl_errno_to_rc(errno, FSL_RC_RANGE),
				    "%s", "wcsdup");
				fsl_free(line);
				return rc;
			}
		} else if (s->first_line_onscreen + nprinted == s->matched_line
		    && regmatch->rm_so >= 0 &&
		    regmatch->rm_so < regmatch->rm_eo) {
			rc = write_matched_line(&width, line,
			    view->ncols - idfield, idfield,
			    view->window, regmatch);
			if (rc) {
				fsl_free(line);
				return rc;
			}
			width += idfield;
		} else {
			rc = formatln(&wcstr, &width, line,
			    view->ncols - idfield, idfield);
			waddwstr(view->window, wcstr);
			fsl_free(wcstr);
			wcstr = NULL;
			width += idfield;
		}

		if (width <= view->ncols - 1)
			waddch(view->window, '\n');
		if (++nprinted == 1)
			s->first_line_onscreen = lineno;
	}
	fsl_free(line);
	s->last_line_onscreen = lineno;

	draw_vborder(view);

	return rc;
}

static int
blame_input_handler(struct fnc_view **new_view, struct fnc_view *view, int ch)
{
	struct fnc_view			*diff_view;
	struct fnc_blame_view_state	*s = &view->state.blame;
	int				 start_col = 0, rc = 0;

	switch (ch) {
	case 'q':
		s->done = true;
		if (s->selected_commit)
			fnc_commit_artifact_close(s->selected_commit);
		break;
	case 'c':
		s->colour = !s->colour;
		break;
	case 'g':
		if (!fnc_home(view))
			break;
	case KEY_HOME:
		s->selected_line = 1;
		s->first_line_onscreen = 1;
		break;
	case KEY_END:
	case 'G':
		if (s->blame.nlines < view->nlines - 2) {
			s->selected_line = s->blame.nlines;
			s->first_line_onscreen = 1;
		} else {
			s->selected_line = view->nlines - 2;
			s->first_line_onscreen = s->blame.nlines -
			    (view->nlines - 3);
		}
		break;
	case KEY_UP:
	case 'k':
		if (s->selected_line > 1)
			--s->selected_line;
		else if (s->selected_line == 1 && s->first_line_onscreen > 1)
			--s->first_line_onscreen;
		break;
	case KEY_PPAGE:
	case CTRL('b'):
		if (s->first_line_onscreen == 1) {
			s->selected_line = 1;
			break;
		}
		if (s->first_line_onscreen > view->nlines - 2)
			s->first_line_onscreen -= (view->nlines - 2);
		else
			s->first_line_onscreen = 1;
		break;
	case KEY_DOWN:
	case 'j':
		if (s->selected_line < view->nlines - 2 &&
		    s->first_line_onscreen +
		    s->selected_line <= s->blame.nlines)
			++s->selected_line;
		else if (s->last_line_onscreen < s->blame.nlines)
			++s->first_line_onscreen;
		break;
	case 'b':
	case 'p': {
		fsl_uuid_cstr id = NULL;
		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
		    s->first_line_onscreen, s->selected_line);
		if (id == NULL)
			break;
		if (ch == 'p') {
			fsl_cx		*f = fcli_cx();
			fsl_db		*db = fsl_needs_repo(f);
			fsl_deck	 d = fsl_deck_empty;
			fsl_id_t	 rid = fsl_uuid_to_rid(f, id);
			fsl_uuid_str	 pid = fsl_db_g_text(db, NULL,
			    "SELECT uuid FROM plink, blob WHERE plink.cid=%d "
			    "AND blob.rid=plink.pid AND plink.isprim", rid);
			if (pid == NULL)
				break;
			/* Check file exists in parent check-in. */
			rc = fsl_deck_load_sym(f, &d, pid, FSL_SATYPE_CHECKIN);
			if (rc) {
				fsl_deck_finalize(&d);
				fsl_free(pid);
				return RC(rc, "%s", "fsl_deck_load_sym");
			}
			rc = fsl_deck_F_rewind(&d);
			if (rc) {
				fsl_deck_finalize(&d);
				fsl_free(pid);
				return RC(rc, "%s", "fsl_deck_F_rewind");
			}
			if (fsl_deck_F_search(&d, s->path +
			    (fnc_init.sym ? 0 : 1)) == NULL) {
				char *m = fsl_mprintf("-- %s not in [%.12s] --",
				    s->path + (fnc_init.sym ? 0 : 1), pid);
				if (m == NULL)
					rc = RC(FSL_RC_ERROR, "%s",
					    "fsl_mprintf");
				wattr_on(view->window, A_BOLD, NULL);
				mvwaddstr(view->window,
				    view->start_ln + view->nlines - 1, 0, m);
				wclrtoeol(view->window);
				wattr_off(view->window, A_BOLD, NULL);
				update_panels();
				doupdate();
				sleep(1);
				fsl_deck_finalize(&d);
				fsl_free(pid);
				fsl_free(m);
				break;
			}
			rc = fnc_commit_qid_alloc(&s->blamed_commit, pid);
			if (rc)
				return rc;
		} else {
			if (!fsl_uuidcmp(id, s->blamed_commit->id))
				break;
			rc = fnc_commit_qid_alloc(&s->blamed_commit, id);
		}
		if (rc)
			break;
		s->done = true;
		rc = stop_blame(&s->blame);
		s->done = false;
		if (rc)
			break;
		CONCAT(STAILQ, _INSERT_HEAD)(&s->blamed_commits,
		    s->blamed_commit, entry);
		rc = run_blame(view);
		if (rc)
			break;
		break;
	}
	case KEY_BACKSPACE:
	case 'B': {
		struct fnc_commit_qid *first;
		first = CONCAT(STAILQ, _FIRST)(&s->blamed_commits);
		if (!fsl_uuidcmp(first->id, s->commit_id))
			break;
		s->done = true;
		rc = stop_blame(&s->blame);
		s->done = false;
		if (rc)
			break;
		CONCAT(STAILQ, _REMOVE_HEAD)(&s->blamed_commits, entry);
		fnc_commit_qid_free(s->blamed_commit);
		s->blamed_commit = CONCAT(STAILQ, _FIRST)(&s->blamed_commits);
		rc = run_blame(view);
		if (rc)
			break;
		break;
	}
	case KEY_ENTER:
	case '\r': {
		fsl_cx				*f = fcli_cx();
		struct fnc_commit_artifact	*commit = NULL;
		fsl_stmt			*q = NULL;
		fsl_uuid_cstr			 id = NULL;

		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
		    s->first_line_onscreen, s->selected_line);
		if (id == NULL)
			break;
		if (s->selected_commit)
			fnc_commit_artifact_close(s->selected_commit);
		if (rc)
			break;
		q = fsl_stmt_malloc();
		rc = commit_builder(&commit, fsl_uuid_to_rid(f, id), q);
		fsl_stmt_finalize(q);
		if (rc) {
			fnc_commit_artifact_close(commit);
			break;
		}
		if (view_is_parent(view))
		    start_col = view_split_start_col(view->start_col);
		diff_view = view_open(0, 0, 0, start_col, FNC_VIEW_DIFF);
		if (diff_view == NULL) {
			fnc_commit_artifact_close(commit);
			rc = RC(FSL_RC_ERROR, "%s", "view_open");
			break;
		}
		rc = open_diff_view(diff_view, commit, DIFF_DEF_CTXT,
		    fnc_init.ws, fnc_init.invert, !fnc_init.quiet, NULL, true,
		    NULL);
		s->selected_commit = commit;
		if (rc) {
			fnc_commit_artifact_close(commit);
			view_close(diff_view);
			break;
		}
		view->active = false;
		diff_view->active = true;
		if (view_is_parent(view)) {
			rc = view_close_child(view);
			if (rc)
				break;
			view_set_child(view, diff_view);
			view->focus_child = true;
		} else
			*new_view = diff_view;
		if (rc)
			break;
		break;
	}
	case KEY_NPAGE:
	case CTRL('f'):
	case ' ':
		if (s->last_line_onscreen >= s->blame.nlines && s->selected_line
		    >= MIN(s->blame.nlines, view->nlines - 2))
			break;
		if (s->last_line_onscreen >= s->blame.nlines &&
		    s->selected_line < view->nlines - 2) {
			s->selected_line = MIN(s->blame.nlines,
			    view->nlines - 2);
			break;
		}
		if (s->last_line_onscreen + view->nlines - 2 <= s->blame.nlines)
			s->first_line_onscreen += view->nlines - 2;
		else
			s->first_line_onscreen =
			    s->blame.nlines - (view->nlines - 3);
		break;
	case KEY_RESIZE:
		if (s->selected_line > view->nlines - 2) {
			s->selected_line = MIN(s->blame.nlines,
			    view->nlines - 2);
		}
		break;
	default:
		break;
	}
	return rc;
}

static int
blame_search_init(struct fnc_view *view)
{
	struct fnc_blame_view_state *s = &view->state.blame;

	s->matched_line = 0;
	return 0;
}

static int
blame_search_next(struct fnc_view *view)
{
	struct fnc_blame_view_state	*s = &view->state.blame;
	char				*line = NULL;
	ssize_t				 linelen;
	size_t				 linesz = 0;
	int				 lineno;

	if (view->searching == SEARCH_DONE) {
		view->search_status = SEARCH_CONTINUE;
		return 0;
	}

	if (s->matched_line) {
		if (view->searching == SEARCH_FORWARD)
			lineno = s->matched_line + 1;
		else
			lineno = s->matched_line - 1;
	} else {
		if (view->searching == SEARCH_FORWARD)
			lineno = 1;
		else
			lineno = s->blame.nlines;
	}

	while (1) {
		off_t offset;

		if (lineno <= 0 || lineno > s->blame.nlines) {
			if (s->matched_line == 0) {
				view->search_status = SEARCH_CONTINUE;
				break;
			}

			if (view->searching == SEARCH_FORWARD)
				lineno = 1;
			else
				lineno = s->blame.nlines;
		}

		offset = s->blame.line_offsets[lineno - 1];
		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
			fsl_free(line);
			return RC(fsl_errno_to_rc(errno, FSL_RC_IO),
			    "%s", "fseeko");
		}
		linelen = getline(&line, &linesz, s->blame.f);
		if (linelen != -1 && regexec(&view->regex, line, 1,
		    &view->regmatch, 0) == 0) {
			view->search_status = SEARCH_CONTINUE;
			s->matched_line = lineno;
			break;
		}
		if (view->searching == SEARCH_FORWARD)
			++lineno;
		else
			--lineno;
	}
	fsl_free(line);

	if (s->matched_line) {
		s->first_line_onscreen = s->matched_line;
		s->selected_line = 1;
	}

	return 0;
}

static fsl_uuid_cstr
get_selected_commit_id(struct fnc_blame_line *lines, int nlines,
    int first_line_onscreen, int selected_line)
{
	struct fnc_blame_line *line;

	if (nlines <= 0)
		return NULL;

	line = &lines[first_line_onscreen - 1 + selected_line - 1];

	return line->id;
}

static int
fnc_commit_qid_alloc(struct fnc_commit_qid **qid, fsl_uuid_cstr id)
{
	int rc = 0;

	*qid = calloc(1, sizeof(**qid));
	if (*qid == NULL)
		return RC(fsl_errno_to_rc(errno, FSL_RC_ERROR), "%s", "calloc");

	(*qid)->id = fsl_strdup(id);
	if ((*qid)->id == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		fnc_commit_qid_free(*qid);
		*qid = NULL;
	}

	return rc;
}

static int
close_blame_view(struct fnc_view *view)
{
	struct fnc_blame_view_state	*s = &view->state.blame;
	struct fsl_list_state		 st = { FNC_COLOUR_OBJ };
	int				 rc = 0;

	rc = stop_blame(&s->blame);

	while (!CONCAT(STAILQ, _EMPTY)(&s->blamed_commits)) {
		struct fnc_commit_qid *blamed_commit;
		blamed_commit = CONCAT(STAILQ, _FIRST)(&s->blamed_commits);
		CONCAT(STAILQ, _REMOVE_HEAD)(&s->blamed_commits, entry);
		fnc_commit_qid_free(blamed_commit);
	}

	fsl_free(s->path);
	fsl_list_clear(&s->colours, fsl_list_object_free, &st);

	return rc;
}

static int
stop_blame(struct fnc_blame *blame)
{
	int idx, rc = 0;

	if (blame->thread_id) {
		int retval;
		rc = pthread_mutex_unlock(&fnc_mutex);
		if (rc)
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_unlock");
		rc = pthread_join(blame->thread_id, (void **)&retval);
		if (rc)
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_join");
		rc = pthread_mutex_lock(&fnc_mutex);
		if (rc)
			return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
			    "%s", "pthread_mutex_lock");
		if (!rc && fsl_cx_err_get_e(fcli_cx())->code == FSL_RC_BREAK) {
			rc = 0;
			fcli_err_reset();
		}
		blame->thread_id = 0;
	}
	if (blame->f) {
		if (fclose(blame->f) == EOF && rc == 0)
			rc = RC(fsl_errno_to_rc(errno, FSL_RC_IO), "%s",
			    fclose);
		blame->f = NULL;
	}
	if (blame->lines) {
		for (idx = 0; idx < blame->nlines; ++idx)
			fsl_free(blame->lines[idx].id);
		fsl_free(blame->lines);
		blame->lines = NULL;
	}

	fsl_free(blame->cb_cx.root_commit);
	blame->cb_cx.root_commit = NULL;
	fsl_free(blame->cb_cx.commit_id);
	blame->cb_cx.commit_id = NULL;
	fsl_free(blame->line_offsets);

	return rc;
}

static int
cancel_blame(void *state)
{
	int	*done = state;
	int	 rc = 0;

	rc = pthread_mutex_lock(&fnc_mutex);
	if (rc)
		return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_unlock");

	if (*done)
		rc = fcli_err_set(FSL_RC_BREAK, "user quit");

	rc = pthread_mutex_unlock(&fnc_mutex);
	if (rc)
		return RC(fsl_errno_to_rc(rc, FSL_RC_ACCESS),
		    "%s", "pthread_mutex_lock");

	return rc;
}

static void
fnc_commit_qid_free(struct fnc_commit_qid *qid)
{
	fsl_free(qid->id);
	fsl_free(qid);
}

static int
cmd_branch(fcli_command const *argv)
{
	struct fnc_view	*view;
	char		*glob = NULL;
	double		 dateline;
	int		 branch_flags, rc = 0, when = 0;

	rc = fcli_process_flags(argv->flags);
	if (rc || (rc = fcli_has_unused_flags(false)))
		return rc;

	branch_flags = BRANCH_LS_OPEN_CLOSED;
	if (fnc_init.open && fnc_init.closed)
		return RC(FSL_RC_MISUSE, "%s",
		    "--open and --close are mutually exclusive options");
	else if (fnc_init.open)
		branch_flags = BRANCH_LS_OPEN_ONLY;
	else if (fnc_init.closed)
		branch_flags = BRANCH_LS_CLOSED_ONLY;

	if (fnc_init.sort) {
		if (!fsl_strcmp(fnc_init.sort, "mru"))
			FLAG_SET(branch_flags, BRANCH_SORT_MTIME);
		else if (!fsl_strcmp(fnc_init.sort, "state"))
			FLAG_SET(branch_flags, BRANCH_SORT_STATUS);
		else
			return RC(FSL_RC_MISUSE, "invalid sort order: %s",
			    fnc_init.sort);
	}
	if (fnc_init.noprivate)
		FLAG_SET(branch_flags, BRANCH_LS_NO_PRIVATE);
	if (fnc_init.reverse)
		FLAG_SET(branch_flags, BRANCH_SORT_REVERSE);

	if (fnc_init.after && fnc_init.before) {
		return RC(FSL_RC_MISUSE, "%s",
		    "--before and --after are mutually exclusive options");
	} else if (fnc_init.after || fnc_init.before) {
		const char *d = NULL;
		d = fnc_init.after ? fnc_init.after : fnc_init.before;
		when = fnc_init.after ? 1 : -1;
		rc = fnc_date_to_mtime(&dateline, d, when);
		if (rc)
			return rc;
	}
	glob = fsl_strdup(fcli_next_arg(true));

	init_curses();

	view = view_open(0, 0, 0, 0, FNC_VIEW_BRANCH);
	if (view == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "view_open");
		goto end;
	}

	rc = open_branch_view(view, branch_flags, glob, dateline, when);
	if (rc)
		goto end;

	rc = view_loop(view);
end:
	fnc_free_branches(&view->state.branch);
	fsl_free(glob);
	return rc;
}

static int
open_branch_view(struct fnc_view *view, int branch_flags, const char *glob,
    double dateline, int when)
{
	struct fnc_branch_view_state	*s = &view->state.branch;
	int				 rc = 0;

	s->selected_branch = 0;
	s->colour = !fnc_init.nocolour && has_colors();
	s->branch_flags = branch_flags;
	s->branch_glob = glob;
	s->dateline = dateline;
	s->when = when;

	rc = fnc_load_branches(s);
	if (rc)
		return rc;

	if (s->colour)
		init_pair(FNC_COMMIT_ID, COLOR_GREEN, -1);

	view->show = show_branch_view;
	view->input = branch_input_handler;
	view->close = close_branch_view;
	view->search_init = branch_search_init;
	view->search_next = branch_search_next;

	return 0;
}

static int
fnc_load_branches(struct fnc_branch_view_state *s)
{
	fsl_cx		*const f = fcli_cx();
	fsl_buffer	 sql = fsl_buffer_empty;
	fsl_stmt	*stmt = NULL;
	char		*curr_branch = NULL;
	fsl_id_t	 ckoutrid;
	int		 rc = 0;

	rc = create_tmp_branchlist_table();
	if (rc)
		goto end;

	TAILQ_INIT(&s->branches);
	s->nbranches = 0;

	switch (FLAG_CHK(s->branch_flags, BRANCH_LS_BITMASK)) {
	case BRANCH_LS_OPEN_CLOSED:
		rc = fsl_buffer_append(&sql,
		    "SELECT name, isprivate, isclosed, mtime"
		    " FROM tmp_brlist WHERE 1", -1);
		break;
	case BRANCH_LS_OPEN_ONLY:
		rc = fsl_buffer_append(&sql,
		    "SELECT name, isprivate, isclosed, mtime"
		    " FROM tmp_brlist WHERE NOT isclosed", -1);
		break;
	case BRANCH_LS_CLOSED_ONLY:
		rc = fsl_buffer_append(&sql,
		    "SELECT name, isprivate, isclosed, mtime"
		    " FROM tmp_brlist WHERE isclosed", -1);
		break;
	}
	if (rc)
		goto end;

	if (s->branch_glob) {
		char *like = fsl_mprintf("%%%%%s%%%%", s->branch_glob);
		rc = fsl_buffer_appendf(&sql, " AND name LIKE %Q", like);
		fsl_free(like);
	}
	if (FLAG_CHK(s->branch_flags, BRANCH_LS_NO_PRIVATE))
		rc = fsl_buffer_append(&sql, " AND NOT isprivate", -1);
	if (FLAG_CHK(s->branch_flags, BRANCH_SORT_MTIME))
		rc = fsl_buffer_append(&sql, " ORDER BY -mtime", -1);
	else if (FLAG_CHK(s->branch_flags, BRANCH_SORT_STATUS))
		rc = fsl_buffer_append(&sql, " ORDER BY isclosed", -1);
	else
		rc = fsl_buffer_append(&sql, " ORDER BY name COLLATE nocase",
		    -1);

	if (!rc && (FLAG_CHK(s->branch_flags, BRANCH_SORT_REVERSE)))
		rc = fsl_buffer_append(&sql," DESC", -1);

	stmt = fsl_stmt_malloc();
	if (stmt == NULL)
		goto end;
	if (!rc)
		rc = fsl_cx_prepare(f, stmt, fsl_buffer_cstr(&sql));

	fsl_ckout_version_info(f, &ckoutrid, NULL);
	curr_branch = fsl_db_g_text(fsl_needs_repo(f), NULL,
	    "SELECT value FROM tagxref WHERE rid=%d AND tagid=%d", ckoutrid, 8);

	while (fsl_stmt_step(stmt) == FSL_RC_STEP_ROW) {
		struct fnc_branch *new_branch;
		struct fnc_branchlist_entry *be;
		const char *brname = fsl_stmt_g_text(stmt, 0, NULL);
		bool private = (curr_branch && fsl_stmt_g_int32(stmt, 1) == 1);
		bool open = fsl_stmt_g_int32(stmt, 2) == 0;
		double mtime = fsl_stmt_g_int64(stmt, 3);
		bool curr = curr_branch && !fsl_strcmp(curr_branch, brname);
		if ((s->when > 0 && mtime < s->dateline) ||
		    (s->when < 0 && mtime > s->dateline))
			continue;
		alloc_branch(&new_branch, brname, mtime, open, private, curr);
		fnc_branchlist_insert(&be, &s->branches, new_branch);
		if (be)
			be->idx = s->nbranches++;
	}
	s->first_branch_onscreen = TAILQ_FIRST(&s->branches);

	if (!stmt->rowCount)
		rc = RC(FSL_RC_BREAK, "no matching records: %s",
		    s->branch_glob);
end:
	fsl_stmt_finalize(stmt);
	fsl_free(curr_branch);
	fsl_buffer_clear(&sql);
	return rc;
}

static int
create_tmp_branchlist_table(void)
{
	fsl_cx			*const f = fcli_cx();
	fsl_db			*db = fsl_needs_ckout(f);
	static const char	 tmp_branchlist_table[] =
	    "CREATE TEMP TABLE IF NOT EXISTS tmp_brlist AS "
	    "SELECT tagxref.value AS name,"
	    " max(event.mtime) AS mtime,"
	    " EXISTS(SELECT 1 FROM tagxref AS tx WHERE tx.rid=tagxref.rid"
	    "  AND tx.tagid=(SELECT tagid FROM tag WHERE tagname='closed')"
	    "  AND tx.tagtype > 0) AS isclosed,"
	    " (SELECT tagxref.value FROM plink CROSS JOIN tagxref"
	    "  WHERE plink.pid=event.objid"
	    "  AND tagxref.rid=plink.cid"
	    "  AND tagxref.tagid=(SELECT tagid FROM tag WHERE tagname='branch')"
	    "  AND tagtype>0) AS mergeto,"
	    " count(*) AS nckin,"
	    " (SELECT uuid FROM blob WHERE rid=tagxref.rid) AS ckin,"
	    " event.bgcolor AS bgclr,"
	    " EXISTS(SELECT 1 FROM private WHERE rid=tagxref.rid) AS isprivate "
	    "FROM tagxref, tag, event "
	    "WHERE tagxref.tagid=tag.tagid"
	    " AND tagxref.tagtype>0"
	    " AND tag.tagname='branch'"
	    " AND event.objid=tagxref.rid "
	    "GROUP BY 1;";
	int rc = 0;

	if (!db)
		return RC(FSL_RC_NOT_A_CKOUT, "%s", "fsl_needs_ckout");
	rc = fsl_db_exec(db, tmp_branchlist_table);

	return rc ? RC(fsl_cx_uplift_db_error2(f, db, rc), "%s", "fsl_db_exec")
	    : rc;
}

static int
alloc_branch(struct fnc_branch **branch, const char *name, double mtime,
    bool open, bool priv, bool curr)
{
	fsl_uuid_str	id = NULL;
	char		iso8601[ISO8601_TIMESTAMP], *date = NULL;
	int		rc = 0;

	*branch = calloc(1, sizeof(**branch));
	if (*branch == NULL)
		return RC(FSL_RC_ERROR, "%s", "calloc");

	rc = fsl_sym_to_uuid(fcli_cx(), name, FSL_SATYPE_ANY, &id, NULL);
	if (rc || id == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "fsl_sym_to_uuid");
		fnc_branch_close(*branch);
		*branch = NULL;
		return rc;
	}

	fsl_julian_to_iso8601(mtime, iso8601, false);
	date = fsl_mprintf("%.*s", ISO8601_DATE_ONLY, iso8601);

	(*branch)->id = id;
	(*branch)->name = fsl_strdup(name);
	(*branch)->date = date;
	(*branch)->open = open;
	(*branch)->private = priv;
	(*branch)->current = curr;
	if ((*branch)->name == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "fsl_strdup");
		fnc_branch_close(*branch);
		*branch = NULL;
	}

	return rc;
}

static int
fnc_branchlist_insert(struct fnc_branchlist_entry **newp,
    struct fnc_branchlist_head *branches, struct fnc_branch *branch)
{
	struct fnc_branchlist_entry *new, *be;

	*newp = NULL;

	new = fsl_malloc(sizeof(*new));
	if (new == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_malloc");
	new->branch = branch;
	*newp = new;

	be = TAILQ_LAST(branches, fnc_branchlist_head);
	if (!be) {
		/* Empty list; add first branch. */
		TAILQ_INSERT_HEAD(branches, new, entries);
		return 0;
	}

	/*
	 * Deduplicate (extremely unlikely or impossible?) entries on insert.
	 * Don't force lexicographical order; we already retrieved the branch
	 * names from the database using a query to obtain (a) lexicographical
	 * or (b) user-specified sorted results (i.e., MRU or LRU).
	 */
	while (be) {
		if (!fsl_strcmp(be->branch->name, new->branch->name)) {
			/* Duplicate entry. */
			fsl_free(new);
			*newp = NULL;
			return 0;
		}
		be = TAILQ_PREV(be, fnc_branchlist_head, entries);
	}

	/* No duplicates; add to end of list. */
	TAILQ_INSERT_TAIL(branches, new, entries);
	return 0;
}

static int
show_branch_view(struct fnc_view *view)
{
	struct fnc_branch_view_state	*s = &view->state.branch;
	struct fnc_branchlist_entry	*be;
	char				*line = NULL;
	wchar_t				*wline;
	int				 limit, n, width, rc = 0;

	werase(view->window);
	s->ndisplayed = 0;

	limit = view->nlines;
	if (limit == 0)
		return rc;

	be = s->first_branch_onscreen;

	if ((line = fsl_mprintf("branches [%d/%d]", be->idx + s->selected + 1,
	    s->nbranches)) == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_mprintf");

	rc = formatln(&wline, &width, line, view->ncols, 0);
	if (rc) {
		fsl_free(line);
		return rc;
	}
	if (screen_is_shared(view))
		wstandout(view->window);
	waddwstr(view->window, wline);
	if (screen_is_shared(view))
		wstandend(view->window);
	fsl_free(wline);
	wline = NULL;
	fsl_free(line);
	line = NULL;
	if (width < view->ncols - 1)
		waddch(view->window, '\n');
	if (--limit <= 0)
		return rc;

	n = 0;
	while (be && limit > 0) {
		char *line = NULL;

		line = fsl_mprintf(" %c%s%s%s%s%s%s%c %s",
		    be->branch->open ? '+' : '-', be->branch->name,
		    be->branch->private ? "*" : "",
		    be->branch->current ? "@" : "", s->show_id ?  " [" : "",
		    s->show_id ? be->branch->id : "", s->show_id ? "]" : "",
		    s->show_date ? ':' : 0,
		    s->show_date ? be->branch->date : 0);
		if (line == NULL)
			return RC(FSL_RC_ERROR, "%s", "fsl_mprintf");

		rc = formatln(&wline, &width, line, view->ncols, 0);
		if (rc) {
			fsl_free(line);
			return rc;
		}

		if (n == s->selected) {
			if (view->active)
				wattr_on(view->window, A_REVERSE, NULL);
			s->selected_branch = be;
		}
		if (s->colour)
			wattr_on(view->window, COLOR_PAIR(FNC_COMMIT_ID), NULL);
		waddwstr(view->window, wline);
		if (s->colour)
			wattr_off(view->window, COLOR_PAIR(FNC_COMMIT_ID), NULL);
		if (width < view->ncols - 1)
			waddch(view->window, '\n');
		if (n == s->selected && view->active)
			wattr_off(view->window, A_REVERSE, NULL);

		fsl_free(line);
		fsl_free(wline);
		wline = NULL;
		++n;
		++s->ndisplayed;
		--limit;
		s->last_branch_onscreen = be;
		be = TAILQ_NEXT(be, entries);
	}

	draw_vborder(view);
	return rc;
}

static int
branch_input_handler(struct fnc_view **new_view, struct fnc_view *view, int ch)
{
	struct fnc_branch_view_state	*s = &view->state.branch;
	struct fnc_view			*timeline_view, *tree_view;
	struct fnc_branchlist_entry	*be;
	int				 start_col = 0, n, rc = 0;

	switch (ch) {
	case 'c':
		s->colour = !s->colour;
		break;
	case 'd':
		s->show_date = !s->show_date;
		break;
	case 'i':
		s->show_id = !s->show_id;
		break;
	case KEY_ENTER:
	case '\r':
	case ' ':
		if (!s->selected_branch)
			break;
		if (view_is_parent(view))
			start_col = view_split_start_col(view->start_col);
		rc = tl_branch_entry(&timeline_view, start_col,
		    s->selected_branch);
		view->active = false;
		timeline_view->active = true;
		if (view_is_parent(view)) {
			rc = view_close_child(view);
			if (rc)
				return rc;
			view_set_child(view, timeline_view);
			view->focus_child = true;
		} else
			*new_view = timeline_view;
		break;
	case 't':
		if (!s->selected_branch)
			break;
		if (view_is_parent(view))
			start_col = view_split_start_col(view->start_col);
		rc = browse_branch_tree(&tree_view, start_col,
		    s->selected_branch);
		if (rc || tree_view == NULL)
			break;
		view->active = false;
		tree_view->active = true;
		if (view_is_parent(view)) {
			rc = view_close_child(view);
			if (rc)
				return rc;
			view_set_child(view, tree_view);
			view->focus_child = true;
		} else
			*new_view = tree_view;
		break;
	case 'g':
		if (!fnc_home(view))
			break;
		/* FALL THROUGH */
	case KEY_HOME:
		s->selected = 0;
		s->first_branch_onscreen = TAILQ_FIRST(&s->branches);
		break;
	case KEY_END:
	case 'G':
		s->selected = 0;
		be = TAILQ_LAST(&s->branches, fnc_branchlist_head);
		for (n = 0; n < view->nlines - 1; ++n) {
			if (be == NULL)
				break;
			s->first_branch_onscreen = be;
			be = TAILQ_PREV(be, fnc_branchlist_head, entries);
		}
		if (n > 0)
			s->selected = n - 1;
		break;
	case KEY_UP:
	case 'k':
		if (s->selected > 0) {
			--s->selected;
			break;
		}
		branch_scroll_up(s, 1);
		break;
	case KEY_DOWN:
	case 'j':
		if (s->selected < s->ndisplayed - 1) {
			++s->selected;
			break;
		}
		if (TAILQ_NEXT(s->last_branch_onscreen, entries) == NULL)
			/* Reached last entry. */
			break;
		branch_scroll_down(s, 1);
		break;
	case KEY_PPAGE:
	case CTRL('b'):
		if (s->first_branch_onscreen == TAILQ_FIRST(&s->branches))
			s->selected = 0;
		branch_scroll_up(s, MAX(0, view->nlines - 1));
		break;
	case KEY_NPAGE:
	case CTRL('f'):
		if (TAILQ_NEXT(s->last_branch_onscreen, entries) == NULL) {
			/* No more entries off-page; move cursor down. */
			if (s->selected < s->ndisplayed - 1)
				s->selected = s->ndisplayed - 1;
			break;
		}
		branch_scroll_down(s, view->nlines - 1);
		break;
	case CTRL('l'):
	case 'R':
		fnc_free_branches(s);
		s->branch_glob = NULL; /* Shared pointer. */
		s->when = 0;
		s->branch_flags = BRANCH_LS_OPEN_CLOSED;
		rc = fnc_load_branches(s);
		break;
	case KEY_RESIZE:
		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
			s->selected = view->nlines - 2;
		break;
	default:
		break;
	}

	return rc;
}

static int
tl_branch_entry(struct fnc_view **new_view, int start_col,
    struct fnc_branchlist_entry *be)
{
	struct fnc_view	*timeline_view;
	fsl_id_t	 rid;
	int		 rc = 0;

	*new_view = NULL;

	rid = fsl_uuid_to_rid(fcli_cx(), be->branch->id);
	if (rid < 0)
		return RC(rc, "%s", "fsl_uuid_to_rid");

	timeline_view = view_open(0, 0, 0, start_col, FNC_VIEW_TIMELINE);
	if (timeline_view == NULL) {
		rc = RC(FSL_RC_ERROR, "%s", "view_open");
		goto end;
	}

	rc = open_timeline_view(timeline_view, rid, "/");
end:
	if (rc)
		view_close(timeline_view);
	else
		*new_view = timeline_view;
	return rc;
}

static int
browse_branch_tree(struct fnc_view **new_view, int start_col,
    struct fnc_branchlist_entry *be)
{
	struct fnc_view	*tree_view;
	fsl_id_t	 rid;
	int		 rc = 0;

	*new_view = NULL;

	rid = fsl_uuid_to_rid(fcli_cx(), be->branch->id);
	if (rid < 0)
		return RC(rc, "%s", "fsl_uuid_to_rid");

	tree_view = view_open(0, 0, 0, start_col, FNC_VIEW_TREE);
	if (tree_view == NULL)
		return RC(FSL_RC_ERROR, "%s", "view_open");

	rc = open_tree_view(tree_view, "/", rid);
	if (!rc)
		*new_view = tree_view;
	return rc;
}

static void
branch_scroll_up(struct fnc_branch_view_state *s, int maxscroll)
{
	struct fnc_branchlist_entry	*be;
	int				 idx = 0;

	if (s->first_branch_onscreen == TAILQ_FIRST(&s->branches))
		return;

	be = TAILQ_PREV(s->first_branch_onscreen, fnc_branchlist_head, entries);
	while (idx++ < maxscroll) {
		if (be == NULL)
			break;
		s->first_branch_onscreen = be;
		be = TAILQ_PREV(be, fnc_branchlist_head, entries);
	}
}

static void
branch_scroll_down(struct fnc_branch_view_state *s, int maxscroll)
{
	struct fnc_branchlist_entry	*next, *last;
	int				 idx = 0;

	if (s->first_branch_onscreen)
		next = TAILQ_NEXT(s->first_branch_onscreen, entries);
	else
		next = TAILQ_FIRST(&s->branches);

	last = s->last_branch_onscreen;
	while (next && last && idx++ < maxscroll) {
		last = TAILQ_NEXT(last, entries);
		if (last) {
			s->first_branch_onscreen = next;
			next = TAILQ_NEXT(next, entries);
		}
	}
}

static int
branch_search_init(struct fnc_view *view)
{
	struct fnc_branch_view_state *s = &view->state.branch;

	s->matched_branch = NULL;
	return 0;
}

static int
branch_search_next(struct fnc_view *view)
{
	struct fnc_branch_view_state	*s = &view->state.branch;
	struct fnc_branchlist_entry	*be = NULL;

	if (view->searching == SEARCH_DONE) {
		view->search_status = SEARCH_CONTINUE;
		return 0;
	}

	if (s->matched_branch) {
		if (view->searching == SEARCH_FORWARD) {
			if (s->selected_branch)
				be = TAILQ_NEXT(s->selected_branch, entries);
			else
				be = TAILQ_PREV(s->selected_branch,
				    fnc_branchlist_head, entries);
		} else {
			if (s->selected_branch == NULL)
				be = TAILQ_LAST(&s->branches,
				    fnc_branchlist_head);
			else
				be = TAILQ_PREV(s->selected_branch,
				    fnc_branchlist_head, entries);
		}
	} else {
		if (view->searching == SEARCH_FORWARD)
			be = TAILQ_FIRST(&s->branches);
		else
			be = TAILQ_LAST(&s->branches, fnc_branchlist_head);
	}

	while (1) {
		if (be == NULL) {
			if (s->matched_branch == NULL) {
				view->search_status = SEARCH_CONTINUE;
				return 0;
			}
			if (view->searching == SEARCH_FORWARD)
				be = TAILQ_FIRST(&s->branches);
			else
				be = TAILQ_LAST(&s->branches,
				    fnc_branchlist_head);
		}

		if (match_branchlist_entry(be, &view->regex)) {
			view->search_status = SEARCH_CONTINUE;
			s->matched_branch = be;
			break;
		}

		if (view->searching == SEARCH_FORWARD)
			be = TAILQ_NEXT(be, entries);
		else
			be = TAILQ_PREV(be, fnc_branchlist_head, entries);
	}

	if (s->matched_branch) {
		s->first_branch_onscreen = s->matched_branch;
		s->selected = 0;
	}

	return 0;
}

static int
match_branchlist_entry(struct fnc_branchlist_entry *be, regex_t *regex)
{
	regmatch_t regmatch;

	return regexec(regex, be->branch->name, 1, &regmatch, 0) == 0;
}

static int
close_branch_view(struct fnc_view *view)
{
	struct fnc_branch_view_state *s = &view->state.branch;

	fnc_free_branches(s);

	return 0;
}

static void
fnc_free_branches(struct fnc_branch_view_state *s)
{
	struct fnc_branchlist_entry *be;

	while (!TAILQ_EMPTY(&s->branches)) {
		be = TAILQ_FIRST(&s->branches);
		TAILQ_REMOVE(&s->branches, be, entries);
		fnc_branch_close(be->branch);
		fsl_free(be);
	}
}

static void
fnc_branch_close(struct fnc_branch *branch)
{
	fsl_free(branch->name);
	fsl_free(branch->date);
	fsl_free(branch->id);
	fsl_free(branch);
}

/*
 * Assign path to **inserted->path, with optional ->data assignment, and insert
 * in lexicographically sorted order into the doubly-linked list rooted at
 * *pathlist. If path is not unique, return without adding a duplicate entry.
 */
static int
fnc_pathlist_insert(struct fnc_pathlist_entry **inserted,
    struct fnc_pathlist_head *pathlist, const char *path, void *data)
{
	struct fnc_pathlist_entry	*new, *pe;
	int				 rc = 0;

	if (inserted)
		*inserted = NULL;

	new = fsl_malloc(sizeof(*new));
	if (new == NULL)
		return RC(FSL_RC_ERROR, "%s", "fsl_malloc");
	new->path = path;
	new->pathlen = fsl_strlen(path);
	new->data = data;

	/*
	 * Most likely, supplied paths will be sorted (e.g., fnc diff *.c), so
	 * post-order traversal will be more efficient when inserting entries.
	 */
	pe = TAILQ_LAST(pathlist, fnc_pathlist_head);
	while (pe) {
		int cmp = fnc_path_cmp(pe->path, new->path, pe->pathlen,
		    new->pathlen);
		if (cmp == 0) {
			fsl_free(new);  /* Duplicate path; don't insert. */
			return rc;
		} else if (cmp < 0) {
			TAILQ_INSERT_AFTER(pathlist, pe, new, entry);
			if (inserted)
				*inserted = new;
			return rc;
		}
		pe = TAILQ_PREV(pe, fnc_pathlist_head, entry);
	}

	TAILQ_INSERT_HEAD(pathlist, new, entry);
	if (inserted)
		*inserted = new;
	return rc;
}

static int
fnc_path_cmp(const char *path1, const char *path2, size_t len1, size_t len2)
{
	size_t	minlen;
	size_t	idx = 0;

	/* Trim any leading path separators. */
	while (path1[0] == '/') {
		++path1;
		--len1;
	}
	while (path2[0] == '/') {
		++path2;
		--len2;
	}
	minlen = MIN(len1, len2);

	/* Skip common prefix. */
	while (idx < minlen && path1[idx] == path2[idx])
		++idx;

	/* Are path lengths exactly equal (exluding path separators)? */
	if (len1 == len2 && idx >= minlen)
		return 0;

	/* Trim any redundant trailing path seperators. */
	while (path1[idx] == '/' && path1[idx + 1] == '/')
		++path1;
	while (path2[idx] == '/' && path2[idx + 1] == '/')
		++path2;

	/* Ignore trailing path separators. */
	if (path1[idx] == '/' && path1[idx + 1] == '\0' && path2[idx] == '\0')
		return 0;
	if (path2[idx] == '/' && path2[idx + 1] == '\0' && path1[idx] == '\0')
		return 0;

	/* Order children in subdirectories directly after their parents. */
	if (path1[idx] == '/' && path2[idx] == '\0')
		return 1;
	if (path2[idx] == '/' && path1[idx] == '\0')
		return -1;
	if (path1[idx] == '/' && path2[idx] != '\0')
		return -1;
	if (path2[idx] == '/' && path1[idx] != '\0')
		return 1;

	/* Character immediately after the common prefix determines order. */
	return (unsigned char)path1[idx] < (unsigned char)path2[idx] ? -1 : 1;
}

static void
fnc_pathlist_free(struct fnc_pathlist_head *pathlist)
{
	struct fnc_pathlist_entry *pe;

	while ((pe = TAILQ_FIRST(pathlist)) != NULL) {
		TAILQ_REMOVE(pathlist, pe, entry);
		free(pe);
	}
}

static void
fnc_show_version(void)
{
	printf("%s %s\n", fcli_progname(), PRINT_VERSION);
}

static int
strtonumcheck(int *ret, const char *nstr, const int min, const int max)
{
	const char	*ptr;
	int		 n;

	ptr = NULL;
	errno = 0;

	n = strtonum(nstr, min, max, &ptr);
	if (errno == ERANGE)
		return RC(FSL_RC_RANGE, "<n> out of range: -n|--limit=%s [%s]",
		    nstr, ptr);
	else if (errno != 0 || errno == EINVAL)
		return RC(FSL_RC_MISUSE, "<n> not a number: -n|--limit=%s [%s]",
		    nstr, ptr);
	else if (ptr && *ptr != '\0')
		return RC(FSL_RC_MISUSE,
		    "invalid char in <n>: -n|--limit=%s [%s]", nstr, ptr);

	*ret = n;
	return 0;
}

/*
 * Attempt to parse string d, which must resemble either an ISO8601 formatted
 * date (e.g., 2021-10-10, 2020-01-01T10:10:10), disgregarding any trailing
 * garbage or space characters such that "2021-10-10x" or "2020-01-01 10:10:10"
 * will pass, or an _unambiguous_ DD/MM/YYYY or MM/DD/YYYY formatted date. Upon
 * success, use when to determine which time component to add to the date (i.e.,
 * 1 sec before or after midnight), and convert to an mtime suitable for
 * comparisons with repository mtime fields and assign to *ret. Upon failure,
 * the error state will be updated with an appropriate error message and code.
 */
static int
fnc_date_to_mtime(double *ret, const char *d, int when)
{
	struct tm	t = {0, 0, 0, 0, 0, 0};
	char		iso8601[ISO8601_TIMESTAMP];

	/* Fill the tm structure. */
	if (strptime(d, "%Y-%m-%d", &t) == NULL) {
		/* If not YYYY-MM-DD, try MM/DD/YYYY and DD/MM/YYYY. */
		if (strptime(d, "%D", &t) != NULL) {
			/* If MM/DD/YYYY, check if it could be DD/MM/YYYY too */
			if (strptime(d, "%d/%m/%Y", &t) != NULL)
				return RC(FSL_RC_AMBIGUOUS,
				    "ambiguous date [%s]", d);
		} else if (strptime(d, "%d/%m/%Y", &t) != NULL) {
			/* If DD/MM/YYYY, check if it could be MM/DD/YYYY too */
			if (strptime(d, "%D", &t) != NULL)
				return RC(FSL_RC_AMBIGUOUS,
				    "ambiguous date [%s]", d);
		} else
			return RC(FSL_RC_TYPE, "unable to parse date: %s", d);
	}

	/* Format tm into ISO8601 string then convert to mtime. */
	if (when > 0)	/* After date d. */
		strftime(iso8601, ISO8601_TIMESTAMP, "%FT23:59:59", &t);
	else		/* Before date d. */
		strftime(iso8601, ISO8601_TIMESTAMP, "%FT00:00:01", &t);
	if (!fsl_iso8601_to_julian(iso8601, ret))
		return RC(FSL_RC_ERROR, "fsl_iso8601_to_julian(%s)", iso8601);

	return 0;
}

static char *
fnc_strsep(char **ptr, const char *sep)
{
	char	*s, *token;

	if ((s = *ptr) == NULL)
		return NULL;

	if (*(token = s + strcspn(s, sep)) != '\0') {
		*token++ = '\0';
		*ptr = token;
	} else
		*ptr = NULL;

	return s;
}

#ifdef __linux__
static size_t
fnc_strlcat(char *restrict dst, const char *restrict src, size_t dstsz)
{
	size_t	offset;
	int	dstlen, srclen, idx = 0;

	offset = dstlen = fsl_strlen(dst);
	srclen = fsl_strlen(src);

	while ((*(dst + offset++) = *(src + idx++)) != '\0')
		if (offset == dstsz - 1)
			break;

	*(dst + offset) = '\0';

	return dstlen + srclen;
}

static size_t
fnc_strlcpy(char *restrict dst, const char *restrict src, size_t dstsz)
{
	size_t offset = 0;

	if (dstsz < 1)
		goto end;

	while ((*(dst + offset) = *(src + offset)) != '\0')
		if (++offset == dstsz) {
			--offset;
			break;
		}

end:
	*(dst + offset) = '\0';
	while (*(src + offset) != '\0')
		++offset;	/* Return src length. */

	return offset;
}
#endif

Added lib/libfossil-config.h.















































































































































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#if !defined(_NET_FOSSIL_SCM_FSL_AMALGAMATION_CONFIG_H_INCLUDED_)
#define _NET_FOSSIL_SCM_FSL_AMALGAMATION_CONFIG_H_INCLUDED_ 1
#define FSL_AUX_SCHEMA "2015-01-24"
#define FSL_CONTENT_SCHEMA "2"
#define FSL_PACKAGE_NAME "libfossil"
#define FSL_LIBRARY_VERSION "0.0.1-alphabeta"
/* Tweak the following for your system... */
#if !defined(HAVE_COMPRESS)
#  define HAVE_COMPRESS 1
#endif
#if !defined(HAVE_DLFCN_H)
#  define HAVE_DLFCN_H 0
#endif
#if !defined(HAVE_DLOPEN)
#  define HAVE_DLOPEN 0
#endif
#if !defined(HAVE_GETADDRINFO)
#  define HAVE_GETADDRINFO 0
#endif
#if !defined(HAVE_INET_NTOP)
#  define HAVE_INET_NTOP 0
#endif
#if !defined(HAVE_INTTYPES_H)
#  define HAVE_INTTYPES_H 0
#endif
#if !defined(HAVE_LIBDL)
#  define HAVE_LIBDL 0
#endif
#if !defined(HAVE_LIBLTDL)
#  define HAVE_LIBLTDL 0
#endif
#if !defined(_WIN32)
#if !defined(HAVE_LSTAT)
#  define HAVE_LSTAT 1
#endif
#if !defined(HAVE_LTDL_H)
#  define HAVE_LTDL_H 0
#endif
#if !defined(HAVE_LT_DLOPEN)
#  define HAVE_LT_DLOPEN 0
#endif
#if !defined(HAVE_OPENDIR)
#  define HAVE_OPENDIR 1
#endif
#if !defined(HAVE_PIPE)
#  define HAVE_PIPE 1
#endif
#if !defined(HAVE_STAT)
#  define HAVE_STAT 1
#endif
#if !defined(HAVE_STDINT_H)
#  define HAVE_STDINT_H 1
#endif
#if !defined(_DEFAULT_SOURCE)
#  define _DEFAULT_SOURCE 1
#endif
#if !defined(_XOPEN_SOURCE)
#  define _XOPEN_SOURCE 500
#endif
#else
#if !defined(HAVE_LSTAT)
#  define HAVE_LSTAT 0
#endif
#if !defined(HAVE_LTDL_H)
#  define HAVE_LTDL_H 0
#endif
#if !defined(HAVE_LT_DLOPEN)
#  define HAVE_LT_DLOPEN 0
#endif
#if !defined(HAVE_OPENDIR)
#  define HAVE_OPENDIR 1
#endif
#if !defined(HAVE_PIPE)
#  define HAVE_PIPE 0
#endif
#if !defined(HAVE_STAT)
#  define HAVE_STAT 0
#endif
#if !defined(HAVE_STDINT_H)
#  define HAVE_STDINT_H 1
#endif
#endif
/* _WIN32 */


#define FSL_LIB_VERSION_HASH "acbd39275f0d573a74d996caea7918afafff2ff7"
#define FSL_LIB_VERSION_TIMESTAMP "2021-10-08 03:15:51.855 UTC"
#define FSL_LIB_CONFIG_TIME "2021-10-08 04:07 GMT"
#if defined(_MSC_VER)
#define FSL_PLATFORM_OS "windows"
#define FSL_PLATFORM_IS_WINDOWS 1
#define FSL_PLATFORM_IS_UNIX 0
#define FSL_PLATFORM_PLATFORM "windows"
#define FSL_PLATFORM_PATH_SEPARATOR ";"
#define FSL_CHECKOUTDB_NAME "./_FOSSIL_"
/* define a __func__ compatibility macro */
#if _MSC_VER < 1500    /* (vc9.0; dev studio 2008) */
/* sorry; cant do much better than nothing at all on those earlier ones */
#define __func__ "(func)"
#else
#define __func__ __FUNCTION__
#endif
/* for the time being at least, don't complain about there being secure crt alternatives: */
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
/* for the time being at least, don't complain about using POSIX names instead of ISO C++: */
#pragma warning ( disable : 4996 )
/* for the time being at least, suppresss some int conversion warnings */
#pragma warning ( disable : 4244 )     /*'fsl_size_t' to 'int'; this masks other problems that should be fixed*/
#pragma warning ( disable : 4761 )     /*'integral size mismatch in argument'; more size_t problems*/
#pragma warning ( disable : 4267 )     /*'size_t' to 'int'; crops up especially in 64-bit builds*/
/* these were extracted from fossil's unistd.h */
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#include <io.h>
#elif defined(__MINGW32__)
#define FSL_PLATFORM_OS "mingw"
#define FSL_PLATFORM_IS_WINDOWS 1
#define FSL_PLATFORM_IS_UNIX 0
#define FSL_PLATFORM_PLATFORM "windows"
#define FSL_PLATFORM_PATH_SEPARATOR ";"
#define FSL_CHECKOUTDB_NAME "./.fslckout"
#elif defined(__CYGWIN__)
#define FSL_PLATFORM_OS "cygwin"
#define FSL_PLATFORM_IS_WINDOWS 0
#define FSL_PLATFORM_IS_UNIX 1
#define FSL_PLATFORM_PLATFORM "unix"
#define FSL_PLATFORM_PATH_SEPARATOR ":"
#define FSL_CHECKOUTDB_NAME "./_FOSSIL_"
#else
#define FSL_PLATFORM_OS "unknown"
#define FSL_PLATFORM_IS_WINDOWS 0
#define FSL_PLATFORM_IS_UNIX 1
#define FSL_PLATFORM_PLATFORM "unix"
#define FSL_PLATFORM_PATH_SEPARATOR ":"
#define FSL_CHECKOUTDB_NAME "./.fslckout"
#endif


#endif
/* _NET_FOSSIL_SCM_FSL_AMALGAMATION_CONFIG_H_INCLUDED_ */

Added lib/libfossil.c.

more than 10,000 changes

Added lib/libfossil.h.

more than 10,000 changes

Added lib/sqlite3.c.

more than 10,000 changes

Added lib/sqlite3.h.

more than 10,000 changes

Added lib/sqlite3ext.h.
























































































































































































































































































































































































































































































































































































































































































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/*
** 2006 June 7
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the SQLite interface for use by
** shared libraries that want to be imported as extensions into
** an SQLite instance.  Shared libraries that intend to be loaded
** as extensions by SQLite should #include this file instead of 
** sqlite3.h.
*/
#ifndef SQLITE3EXT_H
#define SQLITE3EXT_H
#include "sqlite3.h"

/*
** The following structure holds pointers to all of the SQLite API
** routines.
**
** WARNING:  In order to maintain backwards compatibility, add new
** interfaces to the end of this structure only.  If you insert new
** interfaces in the middle of this structure, then older different
** versions of SQLite will not be able to load each other's shared
** libraries!
*/
struct sqlite3_api_routines {
  void * (*aggregate_context)(sqlite3_context*,int nBytes);
  int  (*aggregate_count)(sqlite3_context*);
  int  (*bind_blob)(sqlite3_stmt*,int,const void*,int n,void(*)(void*));
  int  (*bind_double)(sqlite3_stmt*,int,double);
  int  (*bind_int)(sqlite3_stmt*,int,int);
  int  (*bind_int64)(sqlite3_stmt*,int,sqlite_int64);
  int  (*bind_null)(sqlite3_stmt*,int);
  int  (*bind_parameter_count)(sqlite3_stmt*);
  int  (*bind_parameter_index)(sqlite3_stmt*,const char*zName);
  const char * (*bind_parameter_name)(sqlite3_stmt*,int);
  int  (*bind_text)(sqlite3_stmt*,int,const char*,int n,void(*)(void*));
  int  (*bind_text16)(sqlite3_stmt*,int,const void*,int,void(*)(void*));
  int  (*bind_value)(sqlite3_stmt*,int,const sqlite3_value*);
  int  (*busy_handler)(sqlite3*,int(*)(void*,int),void*);
  int  (*busy_timeout)(sqlite3*,int ms);
  int  (*changes)(sqlite3*);
  int  (*close)(sqlite3*);
  int  (*collation_needed)(sqlite3*,void*,void(*)(void*,sqlite3*,
                           int eTextRep,const char*));
  int  (*collation_needed16)(sqlite3*,void*,void(*)(void*,sqlite3*,
                             int eTextRep,const void*));
  const void * (*column_blob)(sqlite3_stmt*,int iCol);
  int  (*column_bytes)(sqlite3_stmt*,int iCol);
  int  (*column_bytes16)(sqlite3_stmt*,int iCol);
  int  (*column_count)(sqlite3_stmt*pStmt);
  const char * (*column_database_name)(sqlite3_stmt*,int);
  const void * (*column_database_name16)(sqlite3_stmt*,int);
  const char * (*column_decltype)(sqlite3_stmt*,int i);
  const void * (*column_decltype16)(sqlite3_stmt*,int);
  double  (*column_double)(sqlite3_stmt*,int iCol);
  int  (*column_int)(sqlite3_stmt*,int iCol);
  sqlite_int64  (*column_int64)(sqlite3_stmt*,int iCol);
  const char * (*column_name)(sqlite3_stmt*,int);
  const void * (*column_name16)(sqlite3_stmt*,int);
  const char * (*column_origin_name)(sqlite3_stmt*,int);
  const void * (*column_origin_name16)(sqlite3_stmt*,int);
  const char * (*column_table_name)(sqlite3_stmt*,int);
  const void * (*column_table_name16)(sqlite3_stmt*,int);
  const unsigned char * (*column_text)(sqlite3_stmt*,int iCol);
  const void * (*column_text16)(sqlite3_stmt*,int iCol);
  int  (*column_type)(sqlite3_stmt*,int iCol);
  sqlite3_value* (*column_value)(sqlite3_stmt*,int iCol);
  void * (*commit_hook)(sqlite3*,int(*)(void*),void*);
  int  (*complete)(const char*sql);
  int  (*complete16)(const void*sql);
  int  (*create_collation)(sqlite3*,const char*,int,void*,
                           int(*)(void*,int,const void*,int,const void*));
  int  (*create_collation16)(sqlite3*,const void*,int,void*,
                             int(*)(void*,int,const void*,int,const void*));
  int  (*create_function)(sqlite3*,const char*,int,int,void*,
                          void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
                          void (*xStep)(sqlite3_context*,int,sqlite3_value**),
                          void (*xFinal)(sqlite3_context*));
  int  (*create_function16)(sqlite3*,const void*,int,int,void*,
                            void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
                            void (*xStep)(sqlite3_context*,int,sqlite3_value**),
                            void (*xFinal)(sqlite3_context*));
  int (*create_module)(sqlite3*,const char*,const sqlite3_module*,void*);
  int  (*data_count)(sqlite3_stmt*pStmt);
  sqlite3 * (*db_handle)(sqlite3_stmt*);
  int (*declare_vtab)(sqlite3*,const char*);
  int  (*enable_shared_cache)(int);
  int  (*errcode)(sqlite3*db);
  const char * (*errmsg)(sqlite3*);
  const void * (*errmsg16)(sqlite3*);
  int  (*exec)(sqlite3*,const char*,sqlite3_callback,void*,char**);
  int  (*expired)(sqlite3_stmt*);
  int  (*finalize)(sqlite3_stmt*pStmt);
  void  (*free)(void*);
  void  (*free_table)(char**result);
  int  (*get_autocommit)(sqlite3*);
  void * (*get_auxdata)(sqlite3_context*,int);
  int  (*get_table)(sqlite3*,const char*,char***,int*,int*,char**);
  int  (*global_recover)(void);
  void  (*interruptx)(sqlite3*);
  sqlite_int64  (*last_insert_rowid)(sqlite3*);
  const char * (*libversion)(void);
  int  (*libversion_number)(void);
  void *(*malloc)(int);
  char * (*mprintf)(const char*,...);
  int  (*open)(const char*,sqlite3**);
  int  (*open16)(const void*,sqlite3**);
  int  (*prepare)(sqlite3*,const char*,int,sqlite3_stmt**,const char**);
  int  (*prepare16)(sqlite3*,const void*,int,sqlite3_stmt**,const void**);
  void * (*profile)(sqlite3*,void(*)(void*,const char*,sqlite_uint64),void*);
  void  (*progress_handler)(sqlite3*,int,int(*)(void*),void*);
  void *(*realloc)(void*,int);
  int  (*reset)(sqlite3_stmt*pStmt);
  void  (*result_blob)(sqlite3_context*,const void*,int,void(*)(void*));
  void  (*result_double)(sqlite3_context*,double);
  void  (*result_error)(sqlite3_context*,const char*,int);
  void  (*result_error16)(sqlite3_context*,const void*,int);
  void  (*result_int)(sqlite3_context*,int);
  void  (*result_int64)(sqlite3_context*,sqlite_int64);
  void  (*result_null)(sqlite3_context*);
  void  (*result_text)(sqlite3_context*,const char*,int,void(*)(void*));
  void  (*result_text16)(sqlite3_context*,const void*,int,void(*)(void*));
  void  (*result_text16be)(sqlite3_context*,const void*,int,void(*)(void*));
  void  (*result_text16le)(sqlite3_context*,const void*,int,void(*)(void*));
  void  (*result_value)(sqlite3_context*,sqlite3_value*);
  void * (*rollback_hook)(sqlite3*,void(*)(void*),void*);
  int  (*set_authorizer)(sqlite3*,int(*)(void*,int,const char*,const char*,
                         const char*,const char*),void*);
  void  (*set_auxdata)(sqlite3_context*,int,void*,void (*)(void*));
  char * (*xsnprintf)(int,char*,const char*,...);
  int  (*step)(sqlite3_stmt*);
  int  (*table_column_metadata)(sqlite3*,const char*,const char*,const char*,
                                char const**,char const**,int*,int*,int*);
  void  (*thread_cleanup)(void);
  int  (*total_changes)(sqlite3*);
  void * (*trace)(sqlite3*,void(*xTrace)(void*,const char*),void*);
  int  (*transfer_bindings)(sqlite3_stmt*,sqlite3_stmt*);
  void * (*update_hook)(sqlite3*,void(*)(void*,int ,char const*,char const*,
                                         sqlite_int64),void*);
  void * (*user_data)(sqlite3_context*);
  const void * (*value_blob)(sqlite3_value*);
  int  (*value_bytes)(sqlite3_value*);
  int  (*value_bytes16)(sqlite3_value*);
  double  (*value_double)(sqlite3_value*);
  int  (*value_int)(sqlite3_value*);
  sqlite_int64  (*value_int64)(sqlite3_value*);
  int  (*value_numeric_type)(sqlite3_value*);
  const unsigned char * (*value_text)(sqlite3_value*);
  const void * (*value_text16)(sqlite3_value*);
  const void * (*value_text16be)(sqlite3_value*);
  const void * (*value_text16le)(sqlite3_value*);
  int  (*value_type)(sqlite3_value*);
  char *(*vmprintf)(const char*,va_list);
  /* Added ??? */
  int (*overload_function)(sqlite3*, const char *zFuncName, int nArg);
  /* Added by 3.3.13 */
  int (*prepare_v2)(sqlite3*,const char*,int,sqlite3_stmt**,const char**);
  int (*prepare16_v2)(sqlite3*,const void*,int,sqlite3_stmt**,const void**);
  int (*clear_bindings)(sqlite3_stmt*);
  /* Added by 3.4.1 */
  int (*create_module_v2)(sqlite3*,const char*,const sqlite3_module*,void*,
                          void (*xDestroy)(void *));
  /* Added by 3.5.0 */
  int (*bind_zeroblob)(sqlite3_stmt*,int,int);
  int (*blob_bytes)(sqlite3_blob*);
  int (*blob_close)(sqlite3_blob*);
  int (*blob_open)(sqlite3*,const char*,const char*,const char*,sqlite3_int64,
                   int,sqlite3_blob**);
  int (*blob_read)(sqlite3_blob*,void*,int,int);
  int (*blob_write)(sqlite3_blob*,const void*,int,int);
  int (*create_collation_v2)(sqlite3*,const char*,int,void*,
                             int(*)(void*,int,const void*,int,const void*),
                             void(*)(void*));
  int (*file_control)(sqlite3*,const char*,int,void*);
  sqlite3_int64 (*memory_highwater)(int);
  sqlite3_int64 (*memory_used)(void);
  sqlite3_mutex *(*mutex_alloc)(int);
  void (*mutex_enter)(sqlite3_mutex*);
  void (*mutex_free)(sqlite3_mutex*);
  void (*mutex_leave)(sqlite3_mutex*);
  int (*mutex_try)(sqlite3_mutex*);
  int (*open_v2)(const char*,sqlite3**,int,const char*);
  int (*release_memory)(int);
  void (*result_error_nomem)(sqlite3_context*);
  void (*result_error_toobig)(sqlite3_context*);
  int (*sleep)(int);
  void (*soft_heap_limit)(int);
  sqlite3_vfs *(*vfs_find)(const char*);
  int (*vfs_register)(sqlite3_vfs*,int);
  int (*vfs_unregister)(sqlite3_vfs*);
  int (*xthreadsafe)(void);
  void (*result_zeroblob)(sqlite3_context*,int);
  void (*result_error_code)(sqlite3_context*,int);
  int (*test_control)(int, ...);
  void (*randomness)(int,void*);
  sqlite3 *(*context_db_handle)(sqlite3_context*);
  int (*extended_result_codes)(sqlite3*,int);
  int (*limit)(sqlite3*,int,int);
  sqlite3_stmt *(*next_stmt)(sqlite3*,sqlite3_stmt*);
  const char *(*sql)(sqlite3_stmt*);
  int (*status)(int,int*,int*,int);
  int (*backup_finish)(sqlite3_backup*);
  sqlite3_backup *(*backup_init)(sqlite3*,const char*,sqlite3*,const char*);
  int (*backup_pagecount)(sqlite3_backup*);
  int (*backup_remaining)(sqlite3_backup*);
  int (*backup_step)(sqlite3_backup*,int);
  const char *(*compileoption_get)(int);
  int (*compileoption_used)(const char*);
  int (*create_function_v2)(sqlite3*,const char*,int,int,void*,
                            void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
                            void (*xStep)(sqlite3_context*,int,sqlite3_value**),
                            void (*xFinal)(sqlite3_context*),
                            void(*xDestroy)(void*));
  int (*db_config)(sqlite3*,int,...);
  sqlite3_mutex *(*db_mutex)(sqlite3*);
  int (*db_status)(sqlite3*,int,int*,int*,int);
  int (*extended_errcode)(sqlite3*);
  void (*log)(int,const char*,...);
  sqlite3_int64 (*soft_heap_limit64)(sqlite3_int64);
  const char *(*sourceid)(void);
  int (*stmt_status)(sqlite3_stmt*,int,int);
  int (*strnicmp)(const char*,const char*,int);
  int (*unlock_notify)(sqlite3*,void(*)(void**,int),void*);
  int (*wal_autocheckpoint)(sqlite3*,int);
  int (*wal_checkpoint)(sqlite3*,const char*);
  void *(*wal_hook)(sqlite3*,int(*)(void*,sqlite3*,const char*,int),void*);
  int (*blob_reopen)(sqlite3_blob*,sqlite3_int64);
  int (*vtab_config)(sqlite3*,int op,...);
  int (*vtab_on_conflict)(sqlite3*);
  /* Version 3.7.16 and later */
  int (*close_v2)(sqlite3*);
  const char *(*db_filename)(sqlite3*,const char*);
  int (*db_readonly)(sqlite3*,const char*);
  int (*db_release_memory)(sqlite3*);
  const char *(*errstr)(int);
  int (*stmt_busy)(sqlite3_stmt*);
  int (*stmt_readonly)(sqlite3_stmt*);
  int (*stricmp)(const char*,const char*);
  int (*uri_boolean)(const char*,const char*,int);
  sqlite3_int64 (*uri_int64)(const char*,const char*,sqlite3_int64);
  const char *(*uri_parameter)(const char*,const char*);
  char *(*xvsnprintf)(int,char*,const char*,va_list);
  int (*wal_checkpoint_v2)(sqlite3*,const char*,int,int*,int*);
  /* Version 3.8.7 and later */
  int (*auto_extension)(void(*)(void));
  int (*bind_blob64)(sqlite3_stmt*,int,const void*,sqlite3_uint64,
                     void(*)(void*));
  int (*bind_text64)(sqlite3_stmt*,int,const char*,sqlite3_uint64,
                      void(*)(void*),unsigned char);
  int (*cancel_auto_extension)(void(*)(void));
  int (*load_extension)(sqlite3*,const char*,const char*,char**);
  void *(*malloc64)(sqlite3_uint64);
  sqlite3_uint64 (*msize)(void*);
  void *(*realloc64)(void*,sqlite3_uint64);
  void (*reset_auto_extension)(void);
  void (*result_blob64)(sqlite3_context*,const void*,sqlite3_uint64,
                        void(*)(void*));
  void (*result_text64)(sqlite3_context*,const char*,sqlite3_uint64,
                         void(*)(void*), unsigned char);
  int (*strglob)(const char*,const char*);
  /* Version 3.8.11 and later */
  sqlite3_value *(*value_dup)(const sqlite3_value*);
  void (*value_free)(sqlite3_value*);
  int (*result_zeroblob64)(sqlite3_context*,sqlite3_uint64);
  int (*bind_zeroblob64)(sqlite3_stmt*, int, sqlite3_uint64);
  /* Version 3.9.0 and later */
  unsigned int (*value_subtype)(sqlite3_value*);
  void (*result_subtype)(sqlite3_context*,unsigned int);
  /* Version 3.10.0 and later */
  int (*status64)(int,sqlite3_int64*,sqlite3_int64*,int);
  int (*strlike)(const char*,const char*,unsigned int);
  int (*db_cacheflush)(sqlite3*);
  /* Version 3.12.0 and later */
  int (*system_errno)(sqlite3*);
  /* Version 3.14.0 and later */
  int (*trace_v2)(sqlite3*,unsigned,int(*)(unsigned,void*,void*,void*),void*);
  char *(*expanded_sql)(sqlite3_stmt*);
  /* Version 3.18.0 and later */
  void (*set_last_insert_rowid)(sqlite3*,sqlite3_int64);
  /* Version 3.20.0 and later */
  int (*prepare_v3)(sqlite3*,const char*,int,unsigned int,
                    sqlite3_stmt**,const char**);
  int (*prepare16_v3)(sqlite3*,const void*,int,unsigned int,
                      sqlite3_stmt**,const void**);
  int (*bind_pointer)(sqlite3_stmt*,int,void*,const char*,void(*)(void*));
  void (*result_pointer)(sqlite3_context*,void*,const char*,void(*)(void*));
  void *(*value_pointer)(sqlite3_value*,const char*);
  int (*vtab_nochange)(sqlite3_context*);
  int (*value_nochange)(sqlite3_value*);
  const char *(*vtab_collation)(sqlite3_index_info*,int);
  /* Version 3.24.0 and later */
  int (*keyword_count)(void);
  int (*keyword_name)(int,const char**,int*);
  int (*keyword_check)(const char*,int);
  sqlite3_str *(*str_new)(sqlite3*);
  char *(*str_finish)(sqlite3_str*);
  void (*str_appendf)(sqlite3_str*, const char *zFormat, ...);
  void (*str_vappendf)(sqlite3_str*, const char *zFormat, va_list);
  void (*str_append)(sqlite3_str*, const char *zIn, int N);
  void (*str_appendall)(sqlite3_str*, const char *zIn);
  void (*str_appendchar)(sqlite3_str*, int N, char C);
  void (*str_reset)(sqlite3_str*);
  int (*str_errcode)(sqlite3_str*);
  int (*str_length)(sqlite3_str*);
  char *(*str_value)(sqlite3_str*);
  /* Version 3.25.0 and later */
  int (*create_window_function)(sqlite3*,const char*,int,int,void*,
                            void (*xStep)(sqlite3_context*,int,sqlite3_value**),
                            void (*xFinal)(sqlite3_context*),
                            void (*xValue)(sqlite3_context*),
                            void (*xInv)(sqlite3_context*,int,sqlite3_value**),
                            void(*xDestroy)(void*));
  /* Version 3.26.0 and later */
  const char *(*normalized_sql)(sqlite3_stmt*);
  /* Version 3.28.0 and later */
  int (*stmt_isexplain)(sqlite3_stmt*);
  int (*value_frombind)(sqlite3_value*);
  /* Version 3.30.0 and later */
  int (*drop_modules)(sqlite3*,const char**);
  /* Version 3.31.0 and later */
  sqlite3_int64 (*hard_heap_limit64)(sqlite3_int64);
  const char *(*uri_key)(const char*,int);
  const char *(*filename_database)(const char*);
  const char *(*filename_journal)(const char*);
  const char *(*filename_wal)(const char*);
  /* Version 3.32.0 and later */
  char *(*create_filename)(const char*,const char*,const char*,
                           int,const char**);
  void (*free_filename)(char*);
  sqlite3_file *(*database_file_object)(const char*);
  /* Version 3.34.0 and later */
  int (*txn_state)(sqlite3*,const char*);
};

/*
** This is the function signature used for all extension entry points.  It
** is also defined in the file "loadext.c".
*/
typedef int (*sqlite3_loadext_entry)(
  sqlite3 *db,                       /* Handle to the database. */
  char **pzErrMsg,                   /* Used to set error string on failure. */
  const sqlite3_api_routines *pThunk /* Extension API function pointers. */
);

/*
** The following macros redefine the API routines so that they are
** redirected through the global sqlite3_api structure.
**
** This header file is also used by the loadext.c source file
** (part of the main SQLite library - not an extension) so that
** it can get access to the sqlite3_api_routines structure
** definition.  But the main library does not want to redefine
** the API.  So the redefinition macros are only valid if the
** SQLITE_CORE macros is undefined.
*/
#if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
#define sqlite3_aggregate_context      sqlite3_api->aggregate_context
#ifndef SQLITE_OMIT_DEPRECATED
#define sqlite3_aggregate_count        sqlite3_api->aggregate_count
#endif
#define sqlite3_bind_blob              sqlite3_api->bind_blob
#define sqlite3_bind_double            sqlite3_api->bind_double
#define sqlite3_bind_int               sqlite3_api->bind_int
#define sqlite3_bind_int64             sqlite3_api->bind_int64
#define sqlite3_bind_null              sqlite3_api->bind_null
#define sqlite3_bind_parameter_count   sqlite3_api->bind_parameter_count
#define sqlite3_bind_parameter_index   sqlite3_api->bind_parameter_index
#define sqlite3_bind_parameter_name    sqlite3_api->bind_parameter_name
#define sqlite3_bind_text              sqlite3_api->bind_text
#define sqlite3_bind_text16            sqlite3_api->bind_text16
#define sqlite3_bind_value             sqlite3_api->bind_value
#define sqlite3_busy_handler           sqlite3_api->busy_handler
#define sqlite3_busy_timeout           sqlite3_api->busy_timeout
#define sqlite3_changes                sqlite3_api->changes
#define sqlite3_close                  sqlite3_api->close
#define sqlite3_collation_needed       sqlite3_api->collation_needed
#define sqlite3_collation_needed16     sqlite3_api->collation_needed16
#define sqlite3_column_blob            sqlite3_api->column_blob
#define sqlite3_column_bytes           sqlite3_api->column_bytes
#define sqlite3_column_bytes16         sqlite3_api->column_bytes16
#define sqlite3_column_count           sqlite3_api->column_count
#define sqlite3_column_database_name   sqlite3_api->column_database_name
#define sqlite3_column_database_name16 sqlite3_api->column_database_name16
#define sqlite3_column_decltype        sqlite3_api->column_decltype
#define sqlite3_column_decltype16      sqlite3_api->column_decltype16
#define sqlite3_column_double          sqlite3_api->column_double
#define sqlite3_column_int             sqlite3_api->column_int
#define sqlite3_column_int64           sqlite3_api->column_int64
#define sqlite3_column_name            sqlite3_api->column_name
#define sqlite3_column_name16          sqlite3_api->column_name16
#define sqlite3_column_origin_name     sqlite3_api->column_origin_name
#define sqlite3_column_origin_name16   sqlite3_api->column_origin_name16
#define sqlite3_column_table_name      sqlite3_api->column_table_name
#define sqlite3_column_table_name16    sqlite3_api->column_table_name16
#define sqlite3_column_text            sqlite3_api->column_text
#define sqlite3_column_text16          sqlite3_api->column_text16
#define sqlite3_column_type            sqlite3_api->column_type
#define sqlite3_column_value           sqlite3_api->column_value
#define sqlite3_commit_hook            sqlite3_api->commit_hook
#define sqlite3_complete               sqlite3_api->complete
#define sqlite3_complete16             sqlite3_api->complete16
#define sqlite3_create_collation       sqlite3_api->create_collation
#define sqlite3_create_collation16     sqlite3_api->create_collation16
#define sqlite3_create_function        sqlite3_api->create_function
#define sqlite3_create_function16      sqlite3_api->create_function16
#define sqlite3_create_module          sqlite3_api->create_module
#define sqlite3_create_module_v2       sqlite3_api->create_module_v2
#define sqlite3_data_count             sqlite3_api->data_count
#define sqlite3_db_handle              sqlite3_api->db_handle
#define sqlite3_declare_vtab           sqlite3_api->declare_vtab
#define sqlite3_enable_shared_cache    sqlite3_api->enable_shared_cache
#define sqlite3_errcode                sqlite3_api->errcode
#define sqlite3_errmsg                 sqlite3_api->errmsg
#define sqlite3_errmsg16               sqlite3_api->errmsg16
#define sqlite3_exec                   sqlite3_api->exec
#ifndef SQLITE_OMIT_DEPRECATED
#define sqlite3_expired                sqlite3_api->expired
#endif
#define sqlite3_finalize               sqlite3_api->finalize
#define sqlite3_free                   sqlite3_api->free
#define sqlite3_free_table             sqlite3_api->free_table
#define sqlite3_get_autocommit         sqlite3_api->get_autocommit
#define sqlite3_get_auxdata            sqlite3_api->get_auxdata
#define sqlite3_get_table              sqlite3_api->get_table
#ifndef SQLITE_OMIT_DEPRECATED
#define sqlite3_global_recover         sqlite3_api->global_recover
#endif
#define sqlite3_interrupt              sqlite3_api->interruptx
#define sqlite3_last_insert_rowid      sqlite3_api->last_insert_rowid
#define sqlite3_libversion             sqlite3_api->libversion
#define sqlite3_libversion_number      sqlite3_api->libversion_number
#define sqlite3_malloc                 sqlite3_api->malloc
#define sqlite3_mprintf                sqlite3_api->mprintf
#define sqlite3_open                   sqlite3_api->open
#define sqlite3_open16                 sqlite3_api->open16
#define sqlite3_prepare                sqlite3_api->prepare
#define sqlite3_prepare16              sqlite3_api->prepare16
#define sqlite3_prepare_v2             sqlite3_api->prepare_v2
#define sqlite3_prepare16_v2           sqlite3_api->prepare16_v2
#define sqlite3_profile                sqlite3_api->profile
#define sqlite3_progress_handler       sqlite3_api->progress_handler
#define sqlite3_realloc                sqlite3_api->realloc
#define sqlite3_reset                  sqlite3_api->reset
#define sqlite3_result_blob            sqlite3_api->result_blob
#define sqlite3_result_double          sqlite3_api->result_double
#define sqlite3_result_error           sqlite3_api->result_error
#define sqlite3_result_error16         sqlite3_api->result_error16
#define sqlite3_result_int             sqlite3_api->result_int
#define sqlite3_result_int64           sqlite3_api->result_int64
#define sqlite3_result_null            sqlite3_api->result_null
#define sqlite3_result_text            sqlite3_api->result_text
#define sqlite3_result_text16          sqlite3_api->result_text16
#define sqlite3_result_text16be        sqlite3_api->result_text16be
#define sqlite3_result_text16le        sqlite3_api->result_text16le
#define sqlite3_result_value           sqlite3_api->result_value
#define sqlite3_rollback_hook          sqlite3_api->rollback_hook
#define sqlite3_set_authorizer         sqlite3_api->set_authorizer
#define sqlite3_set_auxdata            sqlite3_api->set_auxdata
#define sqlite3_snprintf               sqlite3_api->xsnprintf
#define sqlite3_step                   sqlite3_api->step
#define sqlite3_table_column_metadata  sqlite3_api->table_column_metadata
#define sqlite3_thread_cleanup         sqlite3_api->thread_cleanup
#define sqlite3_total_changes          sqlite3_api->total_changes
#define sqlite3_trace                  sqlite3_api->trace
#ifndef SQLITE_OMIT_DEPRECATED
#define sqlite3_transfer_bindings      sqlite3_api->transfer_bindings
#endif
#define sqlite3_update_hook            sqlite3_api->update_hook
#define sqlite3_user_data              sqlite3_api->user_data
#define sqlite3_value_blob             sqlite3_api->value_blob
#define sqlite3_value_bytes            sqlite3_api->value_bytes
#define sqlite3_value_bytes16          sqlite3_api->value_bytes16
#define sqlite3_value_double           sqlite3_api->value_double
#define sqlite3_value_int              sqlite3_api->value_int
#define sqlite3_value_int64            sqlite3_api->value_int64
#define sqlite3_value_numeric_type     sqlite3_api->value_numeric_type
#define sqlite3_value_text             sqlite3_api->value_text
#define sqlite3_value_text16           sqlite3_api->value_text16
#define sqlite3_value_text16be         sqlite3_api->value_text16be
#define sqlite3_value_text16le         sqlite3_api->value_text16le
#define sqlite3_value_type             sqlite3_api->value_type
#define sqlite3_vmprintf               sqlite3_api->vmprintf
#define sqlite3_vsnprintf              sqlite3_api->xvsnprintf
#define sqlite3_overload_function      sqlite3_api->overload_function
#define sqlite3_prepare_v2             sqlite3_api->prepare_v2
#define sqlite3_prepare16_v2           sqlite3_api->prepare16_v2
#define sqlite3_clear_bindings         sqlite3_api->clear_bindings
#define sqlite3_bind_zeroblob          sqlite3_api->bind_zeroblob
#define sqlite3_blob_bytes             sqlite3_api->blob_bytes
#define sqlite3_blob_close             sqlite3_api->blob_close
#define sqlite3_blob_open              sqlite3_api->blob_open
#define sqlite3_blob_read              sqlite3_api->blob_read
#define sqlite3_blob_write             sqlite3_api->blob_write
#define sqlite3_create_collation_v2    sqlite3_api->create_collation_v2
#define sqlite3_file_control           sqlite3_api->file_control
#define sqlite3_memory_highwater       sqlite3_api->memory_highwater
#define sqlite3_memory_used            sqlite3_api->memory_used
#define sqlite3_mutex_alloc            sqlite3_api->mutex_alloc
#define sqlite3_mutex_enter            sqlite3_api->mutex_enter
#define sqlite3_mutex_free             sqlite3_api->mutex_free
#define sqlite3_mutex_leave            sqlite3_api->mutex_leave
#define sqlite3_mutex_try              sqlite3_api->mutex_try
#define sqlite3_open_v2                sqlite3_api->open_v2
#define sqlite3_release_memory         sqlite3_api->release_memory
#define sqlite3_result_error_nomem     sqlite3_api->result_error_nomem
#define sqlite3_result_error_toobig    sqlite3_api->result_error_toobig
#define sqlite3_sleep                  sqlite3_api->sleep
#define sqlite3_soft_heap_limit        sqlite3_api->soft_heap_limit
#define sqlite3_vfs_find               sqlite3_api->vfs_find
#define sqlite3_vfs_register           sqlite3_api->vfs_register
#define sqlite3_vfs_unregister         sqlite3_api->vfs_unregister
#define sqlite3_threadsafe             sqlite3_api->xthreadsafe
#define sqlite3_result_zeroblob        sqlite3_api->result_zeroblob
#define sqlite3_result_error_code      sqlite3_api->result_error_code
#define sqlite3_test_control           sqlite3_api->test_control
#define sqlite3_randomness             sqlite3_api->randomness
#define sqlite3_context_db_handle      sqlite3_api->context_db_handle
#define sqlite3_extended_result_codes  sqlite3_api->extended_result_codes
#define sqlite3_limit                  sqlite3_api->limit
#define sqlite3_next_stmt              sqlite3_api->next_stmt
#define sqlite3_sql                    sqlite3_api->sql
#define sqlite3_status                 sqlite3_api->status
#define sqlite3_backup_finish          sqlite3_api->backup_finish
#define sqlite3_backup_init            sqlite3_api->backup_init
#define sqlite3_backup_pagecount       sqlite3_api->backup_pagecount
#define sqlite3_backup_remaining       sqlite3_api->backup_remaining
#define sqlite3_backup_step            sqlite3_api->backup_step
#define sqlite3_compileoption_get      sqlite3_api->compileoption_get
#define sqlite3_compileoption_used     sqlite3_api->compileoption_used
#define sqlite3_create_function_v2     sqlite3_api->create_function_v2
#define sqlite3_db_config              sqlite3_api->db_config
#define sqlite3_db_mutex               sqlite3_api->db_mutex
#define sqlite3_db_status              sqlite3_api->db_status
#define sqlite3_extended_errcode       sqlite3_api->extended_errcode
#define sqlite3_log                    sqlite3_api->log
#define sqlite3_soft_heap_limit64      sqlite3_api->soft_heap_limit64
#define sqlite3_sourceid               sqlite3_api->sourceid
#define sqlite3_stmt_status            sqlite3_api->stmt_status
#define sqlite3_strnicmp               sqlite3_api->strnicmp
#define sqlite3_unlock_notify          sqlite3_api->unlock_notify
#define sqlite3_wal_autocheckpoint     sqlite3_api->wal_autocheckpoint
#define sqlite3_wal_checkpoint         sqlite3_api->wal_checkpoint
#define sqlite3_wal_hook               sqlite3_api->wal_hook
#define sqlite3_blob_reopen            sqlite3_api->blob_reopen
#define sqlite3_vtab_config            sqlite3_api->vtab_config
#define sqlite3_vtab_on_conflict       sqlite3_api->vtab_on_conflict
/* Version 3.7.16 and later */
#define sqlite3_close_v2               sqlite3_api->close_v2
#define sqlite3_db_filename            sqlite3_api->db_filename
#define sqlite3_db_readonly            sqlite3_api->db_readonly
#define sqlite3_db_release_memory      sqlite3_api->db_release_memory
#define sqlite3_errstr                 sqlite3_api->errstr
#define sqlite3_stmt_busy              sqlite3_api->stmt_busy
#define sqlite3_stmt_readonly          sqlite3_api->stmt_readonly
#define sqlite3_stricmp                sqlite3_api->stricmp
#define sqlite3_uri_boolean            sqlite3_api->uri_boolean
#define sqlite3_uri_int64              sqlite3_api->uri_int64
#define sqlite3_uri_parameter          sqlite3_api->uri_parameter
#define sqlite3_uri_vsnprintf          sqlite3_api->xvsnprintf
#define sqlite3_wal_checkpoint_v2      sqlite3_api->wal_checkpoint_v2
/* Version 3.8.7 and later */
#define sqlite3_auto_extension         sqlite3_api->auto_extension
#define sqlite3_bind_blob64            sqlite3_api->bind_blob64
#define sqlite3_bind_text64            sqlite3_api->bind_text64
#define sqlite3_cancel_auto_extension  sqlite3_api->cancel_auto_extension
#define sqlite3_load_extension         sqlite3_api->load_extension
#define sqlite3_malloc64               sqlite3_api->malloc64
#define sqlite3_msize                  sqlite3_api->msize
#define sqlite3_realloc64              sqlite3_api->realloc64
#define sqlite3_reset_auto_extension   sqlite3_api->reset_auto_extension
#define sqlite3_result_blob64          sqlite3_api->result_blob64
#define sqlite3_result_text64          sqlite3_api->result_text64
#define sqlite3_strglob                sqlite3_api->strglob
/* Version 3.8.11 and later */
#define sqlite3_value_dup              sqlite3_api->value_dup
#define sqlite3_value_free             sqlite3_api->value_free
#define sqlite3_result_zeroblob64      sqlite3_api->result_zeroblob64
#define sqlite3_bind_zeroblob64        sqlite3_api->bind_zeroblob64
/* Version 3.9.0 and later */
#define sqlite3_value_subtype          sqlite3_api->value_subtype
#define sqlite3_result_subtype         sqlite3_api->result_subtype
/* Version 3.10.0 and later */
#define sqlite3_status64               sqlite3_api->status64
#define sqlite3_strlike                sqlite3_api->strlike
#define sqlite3_db_cacheflush          sqlite3_api->db_cacheflush
/* Version 3.12.0 and later */
#define sqlite3_system_errno           sqlite3_api->system_errno
/* Version 3.14.0 and later */
#define sqlite3_trace_v2               sqlite3_api->trace_v2
#define sqlite3_expanded_sql           sqlite3_api->expanded_sql
/* Version 3.18.0 and later */
#define sqlite3_set_last_insert_rowid  sqlite3_api->set_last_insert_rowid
/* Version 3.20.0 and later */
#define sqlite3_prepare_v3             sqlite3_api->prepare_v3
#define sqlite3_prepare16_v3           sqlite3_api->prepare16_v3
#define sqlite3_bind_pointer           sqlite3_api->bind_pointer
#define sqlite3_result_pointer         sqlite3_api->result_pointer
#define sqlite3_value_pointer          sqlite3_api->value_pointer
/* Version 3.22.0 and later */
#define sqlite3_vtab_nochange          sqlite3_api->vtab_nochange
#define sqlite3_value_nochange         sqlite3_api->value_nochange
#define sqlite3_vtab_collation         sqlite3_api->vtab_collation
/* Version 3.24.0 and later */
#define sqlite3_keyword_count          sqlite3_api->keyword_count
#define sqlite3_keyword_name           sqlite3_api->keyword_name
#define sqlite3_keyword_check          sqlite3_api->keyword_check
#define sqlite3_str_new                sqlite3_api->str_new
#define sqlite3_str_finish             sqlite3_api->str_finish
#define sqlite3_str_appendf            sqlite3_api->str_appendf
#define sqlite3_str_vappendf           sqlite3_api->str_vappendf
#define sqlite3_str_append             sqlite3_api->str_append
#define sqlite3_str_appendall          sqlite3_api->str_appendall
#define sqlite3_str_appendchar         sqlite3_api->str_appendchar
#define sqlite3_str_reset              sqlite3_api->str_reset
#define sqlite3_str_errcode            sqlite3_api->str_errcode
#define sqlite3_str_length             sqlite3_api->str_length
#define sqlite3_str_value              sqlite3_api->str_value
/* Version 3.25.0 and later */
#define sqlite3_create_window_function sqlite3_api->create_window_function
/* Version 3.26.0 and later */
#define sqlite3_normalized_sql         sqlite3_api->normalized_sql
/* Version 3.28.0 and later */
#define sqlite3_stmt_isexplain         sqlite3_api->stmt_isexplain
#define sqlite3_value_frombind         sqlite3_api->value_frombind
/* Version 3.30.0 and later */
#define sqlite3_drop_modules           sqlite3_api->drop_modules
/* Version 3.31.0 and later */
#define sqlite3_hard_heap_limit64      sqlite3_api->hard_heap_limit64
#define sqlite3_uri_key                sqlite3_api->uri_key
#define sqlite3_filename_database      sqlite3_api->filename_database
#define sqlite3_filename_journal       sqlite3_api->filename_journal
#define sqlite3_filename_wal           sqlite3_api->filename_wal
/* Version 3.32.0 and later */
#define sqlite3_create_filename        sqlite3_api->create_filename
#define sqlite3_free_filename          sqlite3_api->free_filename
#define sqlite3_database_file_object   sqlite3_api->database_file_object
/* Version 3.34.0 and later */
#define sqlite3_txn_state              sqlite3_api->txn_state
#endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */

#if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
  /* This case when the file really is being compiled as a loadable 
  ** extension */
# define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api=0;
# define SQLITE_EXTENSION_INIT2(v)  sqlite3_api=v;
# define SQLITE_EXTENSION_INIT3     \
    extern const sqlite3_api_routines *sqlite3_api;
#else
  /* This case when the file is being statically linked into the 
  ** application */
# define SQLITE_EXTENSION_INIT1     /*no-op*/
# define SQLITE_EXTENSION_INIT2(v)  (void)v; /* unused parameter */
# define SQLITE_EXTENSION_INIT3     /*no-op*/
#endif

#endif /* SQLITE3EXT_H */

Deleted shakenmake.make.

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########################################################################
# ShakeNMake is a GNU Makefile mini-framework for small C/C++ source
# trees (with a small handful of directories, building libraries
# and/or applications. It relies very much on GNU Make 3.81+ and its
# dependencies generation relies on GCC (for the preprocessor only),
# even if GCC will not be used be used as the primary compiler.
all:
########################################################################
# Maintainer's/hacker's notes:
#
# Vars names starting with ShakeNMake are mostly internal to this
# makefile and are considered "private" unless documented otherwise.
# Notable exceptions are most of the ShakeNMake.CALL entries, which
# are $(call)able functions, and ShakeNMake.EVAL entries, which are
# $(eval)able code.
#
########################################################################


########################################################################
# Calculate the top of the source tree, in case this is included
# from a subdir.
ShakeNMake.MAKEFILE := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
$(ShakeNMake.MAKEFILE):# avoid breaking some deps checks if someone renames this file (been there, done that)
TOP_SRCDIR_REL ?= $(patsubst %/,%,$(dir $(ShakeNMake.MAKEFILE)))
#TOP_SRCDIR := $(shell cd -P $(TOP_SRCDIR_REL) && pwd)
TOP_SRCDIR := $(realpath $(TOP_SRCDIR_REL))
#$(error TOP_SRCDIR_REL=$(TOP_SRCDIR_REL)   TOP_SRCDIR=$(TOP_SRCDIR))
#TOP_INCDIR := $(TOP_SRCDIR_REL)/include
#TOP_INCDIR := $(TOP_SRCDIR)/include
#INCLUDES += -I. -I$(TOP_INCDIR) -I$(HOME)/include
#CPPFLAGS += $(INCLUDES)

#TOP_DIR ?= .#$(PWD)
#ShakeNMake.CISH_SOURCES += $(wildcard *.c)

PACKAGE.MAKEFILE := $(firstword $(MAKEFILE_LIST))# normally either Makefile or GNUmakefile
$(PACKAGE.MAKEFILE):


########################################################################
# ShakeNMake.CALL.FIND_FILE call()able function:
# $1 = app name
# $2 = optional path ($(PATH) is always included)
ShakeNMake.CALL.FIND_FILE = $(firstword $(wildcard $(addsuffix /$(1),$(subst :, ,$(2) $(PATH)))))
########################################################################
ShakeNMake.BIN.AR ?= $(call ShakeNMake.CALL.FIND_FILE,$(AR))
ShakeNMake.BIN.GCC ?= $(call ShakeNMake.CALL.FIND_FILE,gcc)
ShakeNMake.BIN.INSTALL ?= $(call ShakeNMake.CALL.FIND_FILE,install)

ifneq (,$(COMSPEC))
$(warning Setting ShakeNMake.SMELLS.LIKE.WINDOWS to 1)
ShakeNMake.SMELLS.LIKE.WINDOWS := 1
ShakeNMake.EXTENSIONS.DLL = .dll
ShakeNMake.EXTENSIONS.LIB = .lib
ShakeNMake.EXTENSIONS.EXE = .exe
else
ShakeNMake.SMELLS.LIKE.WINDOWS := 0
ShakeNMake.EXTENSIONS.DLL = .so
ShakeNMake.EXTENSIONS.LIB = .a
ShakeNMake.EXTENSIONS.EXE =# no whitespace, please
endif

########################################################################
# Cleanup rules.
# To ensure proper cleanup order, define deps on clean-., like so:
# clean-.: clean-mysubdir
# clean-mysubdir: clean-prereqsubdir
#...
.PHONY: clean distclean clean-. distclean-.
clean-%:
	@$(MAKE) --no-print-directory -C $* clean
clean-.:
	@-echo "Cleaning up $(CURDIR)..."; \
	rm -f $@.$$$$ $(CLEAN_FILES) 

clean: clean-.

distclean-%:
	@$(MAKE) --no-print-directory -C $* distclean
distclean-.:
	@-echo "Dist-cleaning up $(CURDIR)..."; \
	rm -f $@.$$$$ $(CLEAN_FILES) $(DISTCLEAN_FILES) 
distclean: distclean-.


########################################################################
# An internal hack to enable "quiet" output. $(1) is a string which
# is shown ONLY if ShakeNMake.QUIET!=1
ShakeNMake.QUIET ?= 0
define ShakeNMake.CALL.SETX
if test x1 = "x$(ShakeNMake.QUIET)"; then echo $(1); else set -x; fi
endef
########################################################################

########################################################################
# Building a static library:
#
#   myLib.LIB.OBJECTS = foo.o bar.o
#   $(call ShakeNMake.CALL.RULES.LIBS,myLib)
#
# A target named myLib.LIB is created for building the library and
# $(myLib.LIB) holds the name of the compiled lib (typically
# "myLib.a").
#
########################################################################
# ShakeNMake.EVAL.RULES.LIB creates rules to build static library
# $(1).a
define ShakeNMake.EVAL.RULES.LIB
$(1).LIB = $(1).a
$(1).LIB: $$($(1).LIB)
CLEAN_FILES += $$($(1).LIB)
$$($(1).LIB): $$($(1).LIB.OBJECTS)
	@$(call ShakeNMake.CALL.SETX,"AR [$$@]"); \
		$$(ShakeNMake.BIN.AR) crs $$@ $$($(1).LIB.OBJECTS)
endef
define ShakeNMake.CALL.RULES.LIBS
$(foreach liba,$(1),$(eval $(call ShakeNMake.EVAL.RULES.LIB,$(liba))))
endef
# end ShakeNMake.EVAL.RULES.LIB
########################################################################

########################################################################
# ShakeNMake.EVAL.RULES.DLL builds builds
# $(1)$(ShakeNMake.EXTENSIONS.DLL) from object files defined by
# $(1).DLL.OBJECTS and $(1).DLL.SOURCES. Flags passed on to the shared
# library linker ($(CC)) include:
#
#   LDFLAGS, $(1).DLL.LDFLAGS, LDADD, -shared -static-libgcc,
#   $(1).DLL.OBJECTS, $(1).DLL.LDFLAGS
#
# Also defines the var $(1).DLL, which expands to the filename of the DLL,
# (normally $(1)$(ShakeNMake.EXTENSIONS.DLL)).
define ShakeNMake.EVAL.RULES.DLL
$(1).DLL = $(1)$(ShakeNMake.EXTENSIONS.DLL)
ifneq (.DLL,$(ShakeNMake.EXTENSIONS.DLL))
$(1).DLL: $$($(1).DLL)
endif
CLEAN_FILES += $$($(1).DLL)
$$($(1).DLL): $$($(1).DLL.SOURCES) $$($(1).DLL.OBJECTS)
	@test x = "x$$($(1).DLL.OBJECTS)$$($(1).DLL.SOURCES)" && { \
	echo "$(1).DLL.OBJECTS and/or $(1).DLL.SOURCES are/is undefined!"; exit 1; }; \
	$(call ShakeNMake.CALL.SETX,"LD [$$@]"); \
	 $$(CC) -o $$@ -shared $$(LDFLAGS) $(LDLIBS) \
		$$($(1).DLL.OBJECTS) \
		$$($(1).DLL.LDFLAGS)
endef
########################################################################
# $(call ShakeNMake.CALL.RULES.DLLS,[list]) calls and $(eval)s
# ShakeNMake.EVAL.RULES.DLL for each entry in $(1)
define ShakeNMake.CALL.RULES.DLLS
$(foreach dll,$(1),$(eval $(call ShakeNMake.EVAL.RULES.DLL,$(dll))))
endef
# end ShakeNMake.CALL.RULES.DLLS and friends
########################################################################


########################################################################
# ShakeNMake.CALL.RULES.BIN is intended to be called like so:
# $(eval $(call ShakeNMake.CALL.RULES.BIN,MyApp))
#
# It builds a binary named $(1) by running $(CXX) and passing it:
#
# LDFLAGS, $(1).BIN.LDFLAGS, $(1).BIN.OBJECTS
define ShakeNMake.CALL.RULES.BIN
$(1).BIN := $(1)$(ShakeNMake.EXTENSIONS.EXE)
$(1).BIN: $$($(1).BIN)
# Many developers feel that bins should not be cleaned by 'make
# clean', but instead by distclean, but i'm not one of those
# developers. i subscribe more to the school of thought that distclean
# is for cleaning up configure-created files. That said, shake-n-make
# isn't designed to use a configure-like process, so that is probably
# moot here and we probably (maybe?) should clean up bins only in
# distclean. As always: hack it to suit your preference:
CLEAN_FILES += $$($(1).BIN)
$$($(1).BIN): $$($(1).BIN.OBJECTS)
	@test x = "x$$($(1).BIN.OBJECTS)" && { \
	echo "$(1).BIN.OBJECTS is undefined!"; exit 1; }; \
	$(call ShakeNMake.CALL.SETX,"LINK [$$@]"); \
	$$(CC) -o $$@ \
		$$($(1).BIN.OBJECTS) \
		$$(LDFLAGS) $$($(1).BIN.LDFLAGS)
endef
########################################################################
# $(call ShakeNMake.EVAL.RULES.BINS,[list]) calls and $(eval)s
# ShakeNMake.CALL.RULES.BIN for each entry in $(1)
define ShakeNMake.CALL.RULES.BINS
$(foreach bin,$(1),$(eval $(call ShakeNMake.CALL.RULES.BIN,$(bin))))
endef
# end ShakeNMake.CALL.RULES.BIN and friends
########################################################################

########################################################################
# Sets up rules for subdir $1.
########################################################################
# Newer (2021-09-01) subdir rules, ported over from toc...
#
# $(call ShakeNMake.CALL.MAKE-SUBDIRS,dirs_list[,target_name=all])
# Walks each dir in $(1), calling $(MAKE) $(2) for each one.
#
#   $1 = list of dirs
#   $2 = make target
#
# Note that this approach makes parallel builds between the dirs in
# $(1) impossible, so it should only be used for targets where
# parallelizing stuff may screw things up or is otherwise not desired
# or not significant.
ShakeNMake.CALL.MAKE-SUBDIRS = \
	test "x$(1)" = "x" -o "x." = "x$(1)" && exit 0; \
	tgt="$(if $(2),$(2),all)"; \
	make_nop_arg=''; \
	test 1 = 1 -o x1 = "x$(ShakeNMake.QUIET)" && make_nop_arg="--no-print-directory"; \
	for b in $(1) "x"; do test ".x" = ".$$$$b" && break; \
		pwd=$$$$(pwd); \
		deep=0; while test $$$$deep -lt $(MAKELEVEL); do echo -n "  "; deep=$$$$((deep+1)); done; \
		echo "Making '$$$$tgt' in $$$${PWD}/$$$${b}"; \
		$(MAKE) -C $$$${b} $$$${make_nop_arg} $$$${tgt} || exit; \
		cd $$$$pwd || exit; \
	done
.PHONY: subdirs $(ShakeNMake.subdirs) $(patsubst %,subdir-%,$(ShakeNMake.subdirs))
$(ShakeNMake.subdirs):
	@+$(call ShakeNMake.MAKE-SUBDIRS,$@,all)
subdirs: $(ShakeNMake.subdirs)
subdir-%:# run all in subdir $*
	@+$(call ShakeNMake.MAKE-SUBDIRS,$*,all)
subdirs-%:# run target % in $(ShakeNMake.subdirs)
	@+$(call ShakeNMake.MAKE-SUBDIRS,$(ShakeNMake.subdirs),$*)
#########################################################################
.PHONY: subdir-.
subdir-.:
define ShakeNMake.CALL.SUBDIR
.PHONY: $(1)
subdir-$(1):
	@+$(call ShakeNMake.CALL.MAKE-SUBDIRS,$(1),all)
clean: clean-$(1)
clean-.: clean-$(1)
distclean-.: distclean-$(1)
subdir-install-$(1):
	@+$(call ShakeNMake.CALL.MAKE-SUBDIRS,$(1),install)
install: subdir-install-$(1)
subdir-uninstall-$(1):
	@+$(call ShakeNMake.CALL.MAKE-SUBDIRS,$(1),uninstall)
uninstall: subdir-uninstall-$(1)
ShakeNMake.subdirs += $(1)
endef
define ShakeNMake.CALL.SUBDIRS
$(foreach dir,$(1),$(eval $(call ShakeNMake.CALL.SUBDIR,$(dir))))
endef
# end ShakeNMake.CALL.SUBDIR and friends
########################################################################


########################################################################
# Automatic dependencies generation for C/C++ code...
# To disable deps generation, set ShakeNMake.USE_MKDEPS=0 *before*
# including this file.
ShakeNMake.USE_MKDEPS := 1
ifeq (,$(ShakeNMake.BIN.GCC))
ShakeNMake.USE_MKDEPS ?= 0
else
ShakeNMake.USE_MKDEPS ?= 1
endif
#$(warning ShakeNMake.USE_MKDEPS=$(ShakeNMake.USE_MKDEPS));
ifeq (1,$(ShakeNMake.USE_MKDEPS))
ShakeNMake.CISH_SOURCES ?= $(wildcard *.cpp *.c *.c++ *.h *.hpp *.h++ *.hh)
#$(warning ShakeNMake.CISH_SOURCES=$(ShakeNMake.CISH_SOURCES))

ifneq (,$(ShakeNMake.CISH_SOURCES))
ShakeNMake.CISH_DEPS_FILE := .make.c_deps
ShakeNMake.BIN.MKDEP = gcc -w -E -MM $(CPPFLAGS)
#$(ShakeNMake.CISH_SOURCES): $(filter-out $(ShakeNMake.CISH_DEPS_FILE),$(MAKEFILE_LIST))
CLEAN_FILES += $(ShakeNMake.CISH_DEPS_FILE)
$(ShakeNMake.CISH_DEPS_FILE): $(PACKAGE.MAKEFILE) $(ShakeNMake.MAKEFILE) $(ShakeNMake.CISH_SOURCES)
	@touch $@; test x = "x$(ShakeNMake.CISH_SOURCES)" && exit 0; \
	echo "Generating dependencies..."; \
	$(ShakeNMake.BIN.MKDEP) $(ShakeNMake.CISH_SOURCES) 2>/dev/null > $@ || exit

#	perl -i -pe 's|^(.+)\.o:\s*((\w+/)*)|$(OBJ.DIR)/$$1.o: $(filter-out $(ShakeNMake.CISH_DEPS_FILE),$(MAKEFILE_LIST))\n$(OBJ.DIR)/$$1.o: $$2|' $@
# That perl bit is a big, ugly, tree-specific hack for libfossil!
# gcc -E -MM strips directory parts (why, i cannot imagine), so we've got to
# hack the output.
# Example: input= src/Foo.cpp
# Generated deps:
#  Foo.o: src/Foo.cpp ...
# So we re-extract that first path and prepend it to Foo.o using the
# above perl.  We also add $(MAKEFILE_LIST) has a prereq of all src
# files because i belong to the school of tought which believes that
# changes to the arbitrary build options set in the makefiles should
# cause a rebuild.
#	if [[ x = "x$(TOP_DIR)" ]]; then echo "REMOVE THIS TREE-SPECIFIC HACK!"; exit 1; fi;\
#ifeq (,$(TOP_DIR))
#$(error Tree-specific hack in place here. See the comments and remove these lines or set TOP_DIR)
#endif
# normally we also want:
#  || $(ShakeNMake.BIN.RM) -f $@ 2>/dev/null
# because we don't want a bad generated makefile to kill the build, but gcc -E
# is returning 1 when some generated files do not yet exist.
deps: $(ShakeNMake.CISH_DEPS_FILE)

ifneq (,$(strip $(filter distclean clean,$(MAKECMDGOALS))))
# $(warning Skipping C/C++ deps generation.)
# ABSOLUTEBOGO := $(shell $(ShakeNMake.BIN.RM) -f $(ShakeNMake.CISH_DEPS_FILE))
else
#$(warning Including C/C++ deps.)
-include $(ShakeNMake.CISH_DEPS_FILE)
endif

endif
# ^^^^ ifneq(,$(ShakeNMake.CISH_SOURCES))
endif
# ^^^^ end $(ShakeNMake.USE_MKDEPS)
########################################################################

########################################################################
# Deps, Tromey's Way:
# $(call ShakeNBake.CALL.MkDep.Tromey,source-file,object-file,depend-file)
ifeq (0,1)
.dfiles.list = $(wildcard *.o.d) $(shell find src -name '*.o.d')
ifneq (,$(.dfiles.list))
# $(error include $(.dfiles.list))
include $(.dfiles.list)
endif

define ShakeNBake.CALL.MkDep.Tromey
$(ShakeNMake.BIN.GCC) -MM \
	-w	\
	-MF $(1).d         \
	-MP            \
	-MT $2         \
	$(CPPFLAGS)    \
	$(TARGET_ARCH) \
	$1
endef

CLEAN_FILES += $(wildcard *.o.d)
%.o: %.c $(mkdir_compdb)
	@$(call ShakeNMake.CALL.SETX,"CC [$@]"); \
	$(COMPILE.c) -MM -MF $(@).d -MP -MT $@.d $(COMPILE.c.OPTIONS) $(OUTPUT_OPTION) $<
#	$(call ShakeNBake.CALL.MkDep.Tromey,$<,$@,$(@).d);

%.o: %.cpp
	@$(call ShakeNMake.CALL.SETX,"C++ [$@]"); \
	$(COMPILE.cc) -MM -MF $@.d -MP -MT $@ $(COMPILE.cc.OPTIONS) $(OUTPUT_OPTION) $<
#	$(COMPILE.cc) $(COMPILE.cc.OPTIONS) $(OUTPUT_OPTION) $<
#	$(call ShakeNBake.CALL.MkDep.Tromey,$<,$@,$(@).d);
else
%.o: %.c $(mkdir_compdb)
	@$(call ShakeNMake.CALL.SETX,"CC [$@]"); \
	$(COMPILE.c) $(COMPILE.c.OPTIONS) $(OUTPUT_OPTION) $<

%.o: %.cpp
	@$(call ShakeNMake.CALL.SETX,"C++ [$@]"); \
	$(COMPILE.cc) $(COMPILE.cc.OPTIONS) $(OUTPUT_OPTION) $<
endif # Tromey's Way

########################################################################
# create emacs tags...
ifneq (1,$(ShakeNMake.ETAGS.DISABLE))
bin_etags := $(call ShakeNMake.CALL.FIND_FILE,etags)
ifeq (.,$(TOP_SRCDIR_REL))
ifneq (,$(bin_etags))
TAGTHESE := $(shell find . -name '*.[ch]' -print)
ifneq (,$(TAGTHESE))
    $(TAGTHESE):
    TAGFILE := TAGS
    $(TAGFILE): $(TAGTHESE) # $(MAKEFILE_LIST)
	@echo "Creating $@..."; \
	for x in $(TAGTHESE); do echo $$x; done | $(bin_etags) -f $@ -; \
		touch $@; true
# ^^^^ Martin G. reports that etags fails with "Unknown option: -" on his
# Ubuntun 18.04 system. Since this isn't a critical feature, we can just
# force this step to succeed.
    tags: $(TAGFILE)
    CLEAN_FILES += $(TAGFILE)
    all: $(TAGFILE)
endif
endif
# ^^^ bin_etags
endif
# ^^^ TOP_SRCDIR_REL==.
endif
# ^^^ $(ShakeNMake.TAGS.DISABLE)

#%.o:
#	@$$(call ShakeNMake.CALL.SETX,"CC [$@] ..."); \
#	$(COMPILE.c) $(COMPILE.c.OPTIONS) -o $@

########################################################################
# Installation rules...
#
# Sample usage:
#
#  ShakeNMake.install.bins = mybin myotherbin # installs to $(DESTDIR)$(prefix)/bin
#  ShakeNMake.install.libs = mylib.a myotherlib.a # installs to $(DESTDIR)$(prefix)/lib
#
# Where (bins, libs...) is the name of an installation rule set, the
# complete list of which is defined somewhere below.
#
# Then `make install` will try to DTRT with those.
#
# These rules are quite ancient - dating back to the very early 2000's
# - and arguably severely overengineered. As part of the port out of
# the original tree, the subdir handling "might" have been broken, so
# be on the lookout for that.
ifeq (,$(wildcard $(ShakeNMake.BIN.INSTALL)))
uninstall install:
	@echo "Install rules require that the variable ShakeNMake.BIN.INSTALL be set."; exit 1
else
DESTDIR ?=
prefix ?= /usr/local
########################################################################
# $(call ShakeNMake.CALL.INSTALL.grep_kludge,file_name)
# This is an ancient kludge force [un]install to silently fail without an
# error when passed an empty file list. This was done because saner
# approaches to checking this failed to work on some older machines.
ShakeNMake.CALL.INSTALL.grep_kludge = echo $(1) "" | grep -q '[a-zA-Z0-9]' || exit 0
########################################################################
# $(call ShakeNMake.CALL.INSTALL,file_list,destdir[,install-sh-flags])
# Installs files $(1) to $(DESTDIR)$(2). $(3) is passed on to
# $(ShakeNMake.BIN.INSTALL).
#
# This code has some rather old logic in it when uses 'cmp' to compare
# the source and dest files, and does not update the destination if
# they are the same. This was originally in place because the install
# code was used to copy header files around the source tree during
# build-time, and we wanted to avoid breaking dependencies. It hasn't
# been used in that way in a long, long time (2003? 2004?) and can
# probably be removed, as it just slows down the install process.
ShakeNMake.CALL.INSTALL = $(call ShakeNMake.CALL.INSTALL.grep_kludge,$(1)); \
	tgtdir="$(DESTDIR)$(2)"; \
	test -d "$$tgtdir" || mkdir -p "$${tgtdir}" \
		|| { err=$$?; echo "$(@): mkdir -p $${tgtdir} failed"; exit $$err; }; \
	for b in $(1) ""; do test -z "$$b" && continue; \
		b=$${b\#\#*/}; \
		target="$${tgtdir}/$$b"; \
		cmd="$(ShakeNMake.BIN.INSTALL) $(3) $$b $$target"; echo $$cmd; $$cmd || exit; \
	done

########################################################################
# $(call ShakeNMake.CALL.UNINSTALL,file_list,source_dir)
# removes all files listed in $(1) from target directory $(DESTDIR)$(2).
#
# Maintenance reminder:
# The while/rmdir loop is there to clean up empty dirs left over by
# the uninstall. This is very arguable but seems more or less
# reasonable. The loop takes care to stop when it reaches $(DESTDIR),
# since DESTDIR is presumably (but not necessarily) created by another
# authority.
ShakeNMake.CALL.UNINSTALL =  $(call ShakeNMake.CALL.INSTALL.grep_kludge,$(1)); \
	tgtdir="$(DESTDIR)$(2)"; \
	test -e "$${tgtdir}" || exit 0; \
	for b in $(1) ""; do test -z "$$b" && continue; \
		fp="$${tgtdir}/$$b"; test -e "$$fp" || continue; \
		cmd="rm $$fp"; echo $$cmd; $$cmd || exit $$?; \
	done; \
	tgtdir="$(2)"; \
	while test x != "x$${tgtdir}" -a '$(prefix)' != "$${tgtdir}" \
		-a '/' != "$${tgtdir}" -a -d "$(DESTDIR)$${tgtdir}"; do \
		rmdir $(DESTDIR)$${tgtdir} 2>/dev/null || break; \
		echo "Removing empty dir: $(DESTDIR)$${tgtdir}"; \
		tgtdir=$${tgtdir%/*}; \
	done; true

ShakeNMake.INSTALL.flags.nonbins = -m 0644
ShakeNMake.INSTALL.flags.bins = -s -m 0755
ShakeNMake.INSTALL.flags.bin-scripts = -m 0755
ShakeNMake.INSTALL.flags.dlls = -m 0755
#.PHONY: install-subdirs
#install: subdirs-install
#install-subdirs: subdirs-install
#.PHONY: uninstall-subdirs
#uninstall-subdirs: subdirs-uninstall
#uninstall: subdirs-uninstall

########################################################################
# $(call ShakeNMake.CALL.define-install-set,SET_NAME,dest_dir,install_flags)
define ShakeNMake.EVAL.define-install-set
$(if $(1),,$(error ShakeNMake.CALL.define-install-set requires an install set name as $$1))
$(if $(2),,$(error ShakeNMake.CALL.define-install-set requires an installation path as $$2))

$(if $(ShakeNMake.install.$(1).dupecheck),$(error ShakeNMake.CALL.define-install-set: rules for $1 have already been created. \
	You cannot create them twice.))
ShakeNMake.install.$(1).dupecheck := 1
ShakeNMake.install.$(1).dest ?= $(2)
ShakeNMake.install.$(1).install-flags ?= $(3)

.PHONY: install-$(1)
install-$(1):
	@test x = "x$$(ShakeNMake.install.$(1))" && exit 0; \
	$$(call ShakeNMake.CALL.INSTALL,$$(ShakeNMake.install.$(1)),$$(ShakeNMake.install.$(1).dest),$$(ShakeNMake.install.$(1).install-flags))
install: install-$(1)

.PHONY: uninstall-$(1)
uninstall-$(1):
	@test x = "x$$(ShakeNMake.install.$(1))" && exit 0; \
	$$(call ShakeNMake.CALL.UNINSTALL,$$(ShakeNMake.install.$(1)),$$(ShakeNMake.install.$(1).dest))
uninstall: uninstall-$(1)
endef
ShakeNMake.CALL.define-install-set = $(eval $(call ShakeNMake.EVAL.define-install-set,$(1),$(2),$(3)))
# set up the initial install locations and install flags:
ShakeNMake.INSTALL.target_basenames := bins sbins \
				bin-scripts \
				libs dlls \
				package_libs package_dlls \
				headers package_headers \
				package_data docs \
				man1 man2 man3 man4 \
				man5 man6 man7 man8 man9
$(call ShakeNMake.CALL.define-install-set,bins,$(prefix)/bin,$(ShakeNMake.INSTALL.flags.bins))
$(call ShakeNMake.CALL.define-install-set,bin-scripts,$(prefix)/bin,$(ShakeNMake.INSTALL.flags.bin-scripts))
#$(call ShakeNMake.CALL.define-install-set,sbins,$(prefix)/sbin,$(ShakeNMake.INSTALL.flags.bins))
$(call ShakeNMake.CALL.define-install-set,libs,$(prefix)/lib,$(ShakeNMake.INSTALL.flags.nonbins))
$(call ShakeNMake.CALL.define-install-set,dlls,$(prefix)/lib,$(ShakeNMake.INSTALL.flags.dlls))
#$(call ShakeNMake.CALL.define-install-set,package_libs,$(prefix)/lib/$(package.name),$(ShakeNMake.INSTALL.flags.nonbins))
#$(call ShakeNMake.CALL.define-install-set,package_dlls,$(prefix)/lib/$(package.name),$(ShakeNMake.INSTALL.flags.dlls))
#$(call ShakeNMake.CALL.define-install-set,headers,$(prefix)/include,$(ShakeNMake.INSTALL.flags.nonbins))
#$(call ShakeNMake.CALL.define-install-set,package_headers,$(prefix)/include/$(package.name),$(ShakeNMake.INSTALL.flags.nonbins))
#$(call ShakeNMake.CALL.define-install-set,package_data,$(prefix)/share/$(package.name),$(ShakeNMake.INSTALL.flags.nonbins))
#$(call ShakeNMake.CALL.define-install-set,docs,$(prefix)/share/doc/$(package.name),$(ShakeNMake.INSTALL.flags.nonbins))
# Set up man page entries...
$(foreach NUM,1 2 3 4 5 6 7 8 9,$(call \
	ShakeNMake.CALL.define-install-set,man$(NUM),$(prefix)/share/man/man$(NUM),$(ShakeNMake.INSTALL.flags.nonbins)))
endif
# /install
########################################################################

Deleted signify/fnc-03-release.pub.

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untrusted comment: fnc 0.3 public key
RWSXIKpSr2F8z3tjmWW3pcJvNH07ArhQ8jkiA/b7weZbyS+Q7R2DG28g

Added signify/fnc-05-release.pub.



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+
untrusted comment: fnc 0.5 public key
RWQTvScFdMzcwQlljPIt0yPn6wpR+T1kR1w0/3HMegAaYyO32FMuzMcM

Deleted src/Makefile.in.

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all:
include ../subdir-inc.make
DISTCLEAN_FILES += Makefile

THE_OBJ := libfossil.o
ifneq (,$(wildcard sqlite3.c))
  HAVE_OWN_SQLITE := 1
  CPPFLAGS += -DSQLITE_CORE
  THE_OBJ += sqlite3.o
else
  HAVE_OWN_SQLITE := 0
endif
CLEAN_FILES += $(THE_OBJ)

# These are the flags used by fossil's embedded sqlite3:
sqlite3.o: CPPFLAGS+=-DNDEBUG=1 \
                 -DSQLITE_DQS=0 \
                 -DSQLITE_THREADSAFE=0 \
                 -DSQLITE_DEFAULT_MEMSTATUS=0 \
                 -DSQLITE_DEFAULT_WAL_SYNCHRONOUS=1 \
                 -DSQLITE_LIKE_DOESNT_MATCH_BLOBS \
                 -DSQLITE_OMIT_DECLTYPE \
                 -DSQLITE_OMIT_PROGRESS_CALLBACK \
                 -DSQLITE_OMIT_SHARED_CACHE \
                 -DSQLITE_OMIT_LOAD_EXTENSION \
                 -DSQLITE_MAX_EXPR_DEPTH=0 \
                 -DSQLITE_USE_ALLOCA \
                 -DSQLITE_ENABLE_LOCKING_STYLE=0 \
                 -DSQLITE_DEFAULT_FILE_FORMAT=4 \
                 -DSQLITE_ENABLE_EXPLAIN_COMMENTS \
                 -DSQLITE_ENABLE_FTS4 \
                 -DSQLITE_ENABLE_DBSTAT_VTAB \
                 -DSQLITE_ENABLE_JSON1 \
                 -DSQLITE_ENABLE_FTS5 \
                 -DSQLITE_ENABLE_STMTVTAB \
                 -DSQLITE_HAVE_ZLIB \
                 -DSQLITE_INTROSPECTION_PRAGMAS \
                 -DSQLITE_ENABLE_DBPAGE_VTAB \
                 -DSQLITE_TRUSTED_SCHEMA=0

# FIXME: update libf sql tracing: -DSQLITE_OMIT_DEPRECATED

sqlite3.o: CFLAGS+=-Wno-sign-compare
ifneq (,$(filter clang,$(CC)))
# Workaround for clang
sqlite3.o: CFLAGS+=-Wno-unused-const-variable
endif

all: $(THE_OBJ)

Added src/fnc.1.