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1#! /bin/sh
2# ylwrap - wrapper for lex/yacc invocations.
42ecbf5e 3
e3046511 4scriptversion=2013-01-12.17; # UTC
42ecbf5e 5
e3046511 6# Copyright (C) 1996-2014 Free Software Foundation, Inc.
42ecbf5e 7#
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8# Written by Tom Tromey <tromey@cygnus.com>.
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2, or (at your option)
13# any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
13b7343a 21# along with this program. If not, see <http://www.gnu.org/licenses/>.
252b5132 22
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23# As a special exception to the GNU General Public License, if you
24# distribute this file as part of a program that contains a
25# configuration script generated by Autoconf, you may include it under
26# the same distribution terms that you use for the rest of that program.
252b5132 27
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28# This file is maintained in Automake, please report
29# bugs to <bug-automake@gnu.org> or send patches to
30# <automake-patches@gnu.org>.
31
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32get_dirname ()
33{
34 case $1 in
35 */*|*\\*) printf '%s\n' "$1" | sed -e 's|\([\\/]\)[^\\/]*$|\1|';;
36 # Otherwise, we want the empty string (not ".").
37 esac
38}
39
40# guard FILE
41# ----------
42# The CPP macro used to guard inclusion of FILE.
43guard ()
44{
45 printf '%s\n' "$1" \
46 | sed \
47 -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
48 -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g' \
49 -e 's/__*/_/g'
50}
51
52# quote_for_sed [STRING]
53# ----------------------
54# Return STRING (or stdin) quoted to be used as a sed pattern.
55quote_for_sed ()
56{
57 case $# in
58 0) cat;;
59 1) printf '%s\n' "$1";;
60 esac \
61 | sed -e 's|[][\\.*]|\\&|g'
62}
63
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64case "$1" in
65 '')
e3046511 66 echo "$0: No files given. Try '$0 --help' for more information." 1>&2
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67 exit 1
68 ;;
69 --basedir)
70 basedir=$2
71 shift 2
72 ;;
73 -h|--h*)
74 cat <<\EOF
75Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
76
77Wrapper for lex/yacc invocations, renaming files as desired.
78
79 INPUT is the input file
80 OUTPUT is one file PROG generates
81 DESIRED is the file we actually want instead of OUTPUT
82 PROGRAM is program to run
83 ARGS are passed to PROG
84
85Any number of OUTPUT,DESIRED pairs may be used.
86
87Report bugs to <bug-automake@gnu.org>.
88EOF
89 exit $?
90 ;;
91 -v|--v*)
92 echo "ylwrap $scriptversion"
93 exit $?
94 ;;
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95esac
96
42ecbf5e 97
252b5132 98# The input.
e3046511 99input=$1
252b5132 100shift
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101# We'll later need for a correct munging of "#line" directives.
102input_sub_rx=`get_dirname "$input" | quote_for_sed`
103case $input in
42ecbf5e 104 [\\/]* | ?:[\\/]*)
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105 # Absolute path; do nothing.
106 ;;
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107 *)
108 # Relative path. Make it absolute.
e3046511 109 input=`pwd`/$input
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110 ;;
111esac
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112input_rx=`get_dirname "$input" | quote_for_sed`
113
114# The parser itself, the first file, is the destination of the .y.c
115# rule in the Makefile.
116parser=$1
117
118# A sed program to s/FROM/TO/g for all the FROM/TO so that, for
119# instance, we rename #include "y.tab.h" into #include "parse.h"
120# during the conversion from y.tab.c to parse.c.
121sed_fix_filenames=
122
123# Also rename header guards, as Bison 2.7 for instance uses its header
124# guard in its implementation file.
125sed_fix_header_guards=
252b5132 126
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127while test $# -ne 0; do
128 if test x"$1" = x"--"; then
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129 shift
130 break
131 fi
e3046511 132 from=$1
42ecbf5e 133 shift
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134 to=$1
135 shift
136 sed_fix_filenames="${sed_fix_filenames}s|"`quote_for_sed "$from"`"|$to|g;"
137 sed_fix_header_guards="${sed_fix_header_guards}s|"`guard "$from"`"|"`guard "$to"`"|g;"
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138done
139
42ecbf5e 140# The program to run.
e3046511 141prog=$1
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142shift
143# Make any relative path in $prog absolute.
e3046511 144case $prog in
42ecbf5e 145 [\\/]* | ?:[\\/]*) ;;
e3046511 146 *[\\/]*) prog=`pwd`/$prog ;;
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147esac
148
252b5132 149dirname=ylwrap$$
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150do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret'
151trap "ret=129; $do_exit" 1
152trap "ret=130; $do_exit" 2
153trap "ret=141; $do_exit" 13
154trap "ret=143; $do_exit" 15
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155mkdir $dirname || exit 1
156
157cd $dirname
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158
159case $# in
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160 0) "$prog" "$input" ;;
161 *) "$prog" "$@" "$input" ;;
252b5132 162esac
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163ret=$?
164
165if test $ret -eq 0; then
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166 for from in *
167 do
168 to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"`
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169 if test -f "$from"; then
170 # If $2 is an absolute path name, then just use that,
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171 # otherwise prepend '../'.
172 case $to in
173 [\\/]* | ?:[\\/]*) target=$to;;
174 *) target=../$to;;
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175 esac
176
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177 # Do not overwrite unchanged header files to avoid useless
178 # recompilations. Always update the parser itself: it is the
179 # destination of the .y.c rule in the Makefile. Divert the
180 # output of all other files to a temporary file so we can
181 # compare them to existing versions.
182 if test $from != $parser; then
183 realtarget=$target
184 target=tmp-`printf '%s\n' "$target" | sed 's|.*[\\/]||g'`
252b5132 185 fi
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186
187 # Munge "#line" or "#" directives. Don't let the resulting
188 # debug information point at an absolute srcdir. Use the real
189 # output file name, not yy.lex.c for instance. Adjust the
190 # include guards too.
191 sed -e "/^#/!b" \
192 -e "s|$input_rx|$input_sub_rx|" \
193 -e "$sed_fix_filenames" \
194 -e "$sed_fix_header_guards" \
195 "$from" >"$target" || ret=$?
196
197 # Check whether files must be updated.
198 if test "$from" != "$parser"; then
199 if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
200 echo "$to is unchanged"
201 rm -f "$target"
202 else
203 echo "updating $to"
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204 mv -f "$target" "$realtarget"
205 fi
206 fi
207 else
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208 # A missing file is only an error for the parser. This is a
209 # blatant hack to let us support using "yacc -d". If -d is not
210 # specified, don't fail when the header file is "missing".
211 if test "$from" = "$parser"; then
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212 ret=1
213 fi
214 fi
42ecbf5e 215 done
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216fi
217
218# Remove the directory.
219cd ..
220rm -rf $dirname
221
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222exit $ret
223
224# Local Variables:
225# mode: shell-script
226# sh-indentation: 2
227# eval: (add-hook 'write-file-hooks 'time-stamp)
228# time-stamp-start: "scriptversion="
229# time-stamp-format: "%:y-%02m-%02d.%02H"
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230# time-stamp-time-zone: "UTC"
231# time-stamp-end: "; # UTC"
42ecbf5e 232# End: