unifdefall.sh revision 248258 
1#!/bin/sh
2#
3# unifdefall: remove all the #if's from a source file
4#
5# Copyright (c) 2002 - 2010 Tony Finch <dot@dotat.at>
6# Copyright (c) 2009 - 2010 Jonathan Nieder <jrnieder@gmail.com>
7#
8# Redistribution and use in source and binary forms, with or without
9# modification, are permitted provided that the following conditions
10# are met:
11# 1. Redistributions of source code must retain the above copyright
12#    notice, this list of conditions and the following disclaimer.
13# 2. Redistributions in binary form must reproduce the above copyright
14#    notice, this list of conditions and the following disclaimer in the
15#    documentation and/or other materials provided with the distribution.
16#
17# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20# ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27# SUCH DAMAGE.
28#
29# $FreeBSD: head/usr.bin/unifdef/unifdefall.sh 248258 2013-03-13 22:50:14Z obrien $
30
31set -e
32
33unifdef="$(dirname "$0")/unifdef"
34if [ ! -e "$unifdef" ]
35then
36	unifdef=unifdef
37fi
38
39case "$@" in
40"-d "*)	echo DEBUGGING 1>&2
41	debug=-d
42	shift
43esac
44
45tmp=$(mktemp -d "${TMPDIR:-/tmp}/${0##*/}.XXXXXXXXXX") || exit 2
46trap 'rm -r "$tmp" || exit 2' EXIT
47
48export LC_ALL=C
49
50# list of all controlling macros
51"$unifdef" $debug -s "$@" | sort | uniq >"$tmp/ctrl"
52# list of all macro definitions
53cpp -dM "$@" | sort | sed 's/^#define //' >"$tmp/hashdefs"
54# list of defined macro names
55sed 's/[^A-Za-z0-9_].*$//' <"$tmp/hashdefs" >"$tmp/alldef"
56# list of undefined and defined controlling macros
57comm -23 "$tmp/ctrl" "$tmp/alldef" >"$tmp/undef"
58comm -12 "$tmp/ctrl" "$tmp/alldef" >"$tmp/def"
59# create a sed script that extracts the controlling macro definitions
60# and converts them to unifdef command-line arguments
61sed 's|.*|s/^&\\(([^)]*)\\)\\{0,1\\} /-D&=/p|' <"$tmp/def" >"$tmp/script"
62# create the final unifdef command
63{	echo "$unifdef" $debug -k '\'
64	# convert the controlling undefined macros to -U arguments
65	sed 's/.*/-U& \\/' <"$tmp/undef"
66	# convert the controlling defined macros to quoted -D arguments
67	sed -nf "$tmp/script" <"$tmp/hashdefs" |
68		sed "s/'/'\\\\''/g;s/.*/'&' \\\\/"
69	echo '"$@"'
70} >"$tmp/cmd"
71case $debug in
72-d)	for i in ctrl hashdefs alldef undef def script cmd
73	do	echo ==== $i
74		cat "$tmp/$i"
75	done 1>&2
76esac
77# run the command we just created
78sh "$tmp/cmd" "$@"
79