#!/bin/sh
#
# unifdefall: remove all the #if's from a source file
#
# Copyright (c) 2002 - 2013 Tony Finch <dot@dotat.at>
# Copyright (c) 2009 - 2010 Jonathan Nieder <jrnieder@gmail.com>
#
# 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR 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.
#
# $FreeBSD: stable/11/usr.bin/unifdef/unifdefall.sh 279297 2015-02-25 21:10:03Z hselasky $

set -e

setglobal unifdef = ""$[dirname $0]/unifdef""
if test ! -e $unifdef
{
	setglobal unifdef = 'unifdef'
}

match @Argv {
with "-d "*	echo DEBUGGING !1 > !2
	setglobal debug = '-d'
	shift
}

setglobal tmp = $[mktemp -d "$(TMPDIR:-/tmp)/$(0##*/).XXXXXXXXXX] || exit 2
trap 'rm -r "$tmp" || exit 2' EXIT

export LC_ALL=C

# list of all controlling macros; assume these are undefined
$unifdef $debug -s @Argv | sort -u | sed 's/^/#undef /' >"$tmp/undefs"
# list of all macro definitions
cc -E -dM @Argv | sort >"$tmp/defs"

match $debug {
with -d	cat "$tmp/undefs" "$tmp/defs" !1 > !2
}

# order of -f arguments means definitions override undefs
$unifdef $debug -k -f "$tmp/undefs" -f "$tmp/defs" @Argv