unifdefall.sh revision 199842 
1#!/bin/sh
2#
3# unifdefall: remove all the #if's from a source file
4#
5# Copyright (c) 2002 - 2009 Tony Finch <dot@dotat.at>.  All rights reserved.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15#
16# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19# ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26# SUCH DAMAGE.
27#
28#	$dotat: unifdef/unifdefall.sh,v 1.24 2009/11/26 12:54:39 fanf2 Exp $
29# $FreeBSD: head/usr.bin/unifdef/unifdefall.sh 199842 2009-11-26 19:08:33Z fanf $
30
31set -e
32
33basename=$(basename $0)
34tmp=$(mktemp -d "${TMPDIR:-/tmp}/$basename.XXXXXXXXXX") || exit 2
35trap 'rm -r "$tmp" || exit 1' EXIT
36
37export LC_ALL=C
38
39# list of all controlling macros
40unifdef -s "$@" | sort | uniq >"$tmp/ctrl"
41# list of all macro definitions
42cpp -dM "$@" | sort | sed 's/^#define //' >"$tmp/hashdefs"
43# list of defined macro names
44sed 's/[^A-Za-z0-9_].*$//' <"$tmp/hashdefs" >"$tmp/alldef"
45# list of undefined and defined controlling macros
46comm -23 "$tmp/ctrl" "$tmp/alldef" >"$tmp/undef"
47comm -12 "$tmp/ctrl" "$tmp/alldef" >"$tmp/def"
48# create a sed script that extracts the controlling macro definitions
49# and converts them to unifdef command-line arguments
50sed 's|.*|s/^&\\(([^)]*)\\)\\{0,1\\} /-D&=/p|' <"$tmp/def" >"$tmp/script"
51# create the final unifdef command
52{	echo unifdef -k \\
53	# convert the controlling undefined macros to -U arguments
54	sed 's/.*/-U& \\/' <"$tmp/undef"
55	# convert the controlling defined macros to quoted -D arguments
56	sed -nf "$tmp/script" <"$tmp/hashdefs" |
57		sed "s/'/'\\\\''/g;s/.*/'&' \\\\/"
58	echo '"$@"'
59} >"$tmp/cmd"
60# run the command we just created
61sh "$tmp/cmd" "$@"
62