3 # unifdefall: remove all the #if's from a source file
5 # Copyright (c) 2002 - 2009 Tony Finch <dot@dotat.at>. All rights reserved.
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
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.
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
28 # $dotat: unifdef/unifdefall.sh,v 1.24 2009/11/26 12:54:39 fanf2 Exp $
33 basename=$(basename $0)
34 tmp=$(mktemp -d "${TMPDIR:-/tmp}/$basename.XXXXXXXXXX") || exit 2
35 trap 'rm -r "$tmp" || exit 1' EXIT
39 # list of all controlling macros
40 unifdef -s "$@" | sort | uniq >"$tmp/ctrl"
41 # list of all macro definitions
42 cpp -dM "$@" | sort | sed 's/^#define //' >"$tmp/hashdefs"
43 # list of defined macro names
44 sed 's/[^A-Za-z0-9_].*$//' <"$tmp/hashdefs" >"$tmp/alldef"
45 # list of undefined and defined controlling macros
46 comm -23 "$tmp/ctrl" "$tmp/alldef" >"$tmp/undef"
47 comm -12 "$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
50 sed 's|.*|s/^&\\(([^)]*)\\)\\{0,1\\} /-D&=/p|' <"$tmp/def" >"$tmp/script"
51 # create the final unifdef command
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/.*/'&' \\\\/"
60 # run the command we just created