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# $FreeBSD$ 30 31set -e 32 33unifdef="$(dirname "$0")/unifdef" 34if [ ! -e "$unifdef" ] 35then 36 unifdef=unifdef 37fi 38 39case "$@" in 40"-d "*) echo DEBUGGING 1>&2 41 debug=-d 42 shift 43esac 44 45basename=$(basename "$0") 46tmp=$(mktemp -d "${TMPDIR:-/tmp}/$basename.XXXXXXXXXX") || exit 2 47trap 'rm -r "$tmp" || exit 2' EXIT 48 49export LC_ALL=C 50 51# list of all controlling macros 52"$unifdef" $debug -s "$@" | sort | uniq >"$tmp/ctrl" 53# list of all macro definitions 54cpp -dM "$@" | sort | sed 's/^#define //' >"$tmp/hashdefs" 55# list of defined macro names 56sed 's/[^A-Za-z0-9_].*$//' <"$tmp/hashdefs" >"$tmp/alldef" 57# list of undefined and defined controlling macros 58comm -23 "$tmp/ctrl" "$tmp/alldef" >"$tmp/undef" 59comm -12 "$tmp/ctrl" "$tmp/alldef" >"$tmp/def" 60# create a sed script that extracts the controlling macro definitions 61# and converts them to unifdef command-line arguments 62sed 's|.*|s/^&\\(([^)]*)\\)\\{0,1\\} /-D&=/p|' <"$tmp/def" >"$tmp/script" 63# create the final unifdef command 64{ echo "$unifdef" $debug -k '\' 65 # convert the controlling undefined macros to -U arguments 66 sed 's/.*/-U& \\/' <"$tmp/undef" 67 # convert the controlling defined macros to quoted -D arguments 68 sed -nf "$tmp/script" <"$tmp/hashdefs" | 69 sed "s/'/'\\\\''/g;s/.*/'&' \\\\/" 70 echo '"$@"' 71} >"$tmp/cmd" 72case $debug in 73-d) for i in ctrl hashdefs alldef undef def script cmd 74 do echo ==== $i 75 cat "$tmp/$i" 76 done 1>&2 77esac 78# run the command we just created 79sh "$tmp/cmd" "$@" 80