3 # unifdefall: remove all the #if's from a source file
5 # Copyright (c) 2002 - 2010 Tony Finch <dot@dotat.at>
6 # Copyright (c) 2009 - 2010 Jonathan Nieder <jrnieder@gmail.com>
8 # Redistribution and use in source and binary forms, with or without
9 # modification, are permitted provided that the following conditions
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.
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
33 unifdef="$(dirname "$0")/unifdef"
34 if [ ! -e "$unifdef" ]
40 "-d "*) echo DEBUGGING 1>&2
45 basename=$(basename "$0")
46 tmp=$(mktemp -d "${TMPDIR:-/tmp}/$basename.XXXXXXXXXX") || exit 2
47 trap 'rm -r "$tmp" || exit 2' EXIT
51 # list of all controlling macros
52 "$unifdef" $debug -s "$@" | sort | uniq >"$tmp/ctrl"
53 # list of all macro definitions
54 cpp -dM "$@" | sort | sed 's/^#define //' >"$tmp/hashdefs"
55 # list of defined macro names
56 sed 's/[^A-Za-z0-9_].*$//' <"$tmp/hashdefs" >"$tmp/alldef"
57 # list of undefined and defined controlling macros
58 comm -23 "$tmp/ctrl" "$tmp/alldef" >"$tmp/undef"
59 comm -12 "$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
62 sed '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/.*/'&' \\\\/"
73 -d) for i in ctrl hashdefs alldef undef def script cmd
78 # run the command we just created