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Revision 5134 - (hide annotations)
Thu Dec 25 18:50:02 2014 UTC (5 years, 8 months ago) by michael
File size: 6858 byte(s)
- propset svn:keywords "Id"

1 michael 5132 #! /bin/sh
2     # ylwrap - wrapper for lex/yacc invocations.
3    
4     scriptversion=2013-01-12.17; # UTC
5    
6     # Copyright (C) 1996-2013 Free Software Foundation, Inc.
7     #
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
21     # along with this program. If not, see <http://www.gnu.org/licenses/>.
22    
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.
27    
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    
32     get_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.
43     guard ()
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.
55     quote_for_sed ()
56     {
57     case $# in
58     0) cat;;
59     1) printf '%s\n' "$1";;
60     esac \
61     | sed -e 's|[][\\.*]|\\&|g'
62     }
63    
64     case "$1" in
65     '')
66     echo "$0: No files given. Try '$0 --help' for more information." 1>&2
67     exit 1
68     ;;
69     --basedir)
70     basedir=$2
71     shift 2
72     ;;
73     -h|--h*)
74     cat <<\EOF
75     Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
76    
77     Wrapper 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    
85     Any number of OUTPUT,DESIRED pairs may be used.
86    
87     Report bugs to <bug-automake@gnu.org>.
88     EOF
89     exit $?
90     ;;
91     -v|--v*)
92     echo "ylwrap $scriptversion"
93     exit $?
94     ;;
95     esac
96    
97    
98     # The input.
99     input=$1
100     shift
101     # We'll later need for a correct munging of "#line" directives.
102     input_sub_rx=`get_dirname "$input" | quote_for_sed`
103     case $input in
104     [\\/]* | ?:[\\/]*)
105     # Absolute path; do nothing.
106     ;;
107     *)
108     # Relative path. Make it absolute.
109     input=`pwd`/$input
110     ;;
111     esac
112     input_rx=`get_dirname "$input" | quote_for_sed`
113    
114     # Since DOS filename conventions don't allow two dots,
115     # the DOS version of Bison writes out y_tab.c instead of y.tab.c
116     # and y_tab.h instead of y.tab.h. Test to see if this is the case.
117     y_tab_nodot=false
118     if test -f y_tab.c || test -f y_tab.h; then
119     y_tab_nodot=true
120     fi
121    
122     # The parser itself, the first file, is the destination of the .y.c
123     # rule in the Makefile.
124     parser=$1
125    
126     # A sed program to s/FROM/TO/g for all the FROM/TO so that, for
127     # instance, we rename #include "y.tab.h" into #include "parse.h"
128     # during the conversion from y.tab.c to parse.c.
129     sed_fix_filenames=
130    
131     # Also rename header guards, as Bison 2.7 for instance uses its header
132     # guard in its implementation file.
133     sed_fix_header_guards=
134    
135     while test $# -ne 0; do
136     if test x"$1" = x"--"; then
137     shift
138     break
139     fi
140     from=$1
141     # Handle y_tab.c and y_tab.h output by DOS
142     if $y_tab_nodot; then
143     case $from in
144     "y.tab.c") from=y_tab.c;;
145     "y.tab.h") from=y_tab.h;;
146     esac
147     fi
148     shift
149     to=$1
150     shift
151     sed_fix_filenames="${sed_fix_filenames}s|"`quote_for_sed "$from"`"|$to|g;"
152     sed_fix_header_guards="${sed_fix_header_guards}s|"`guard "$from"`"|"`guard "$to"`"|g;"
153     done
154    
155     # The program to run.
156     prog=$1
157     shift
158     # Make any relative path in $prog absolute.
159     case $prog in
160     [\\/]* | ?:[\\/]*) ;;
161     *[\\/]*) prog=`pwd`/$prog ;;
162     esac
163    
164     dirname=ylwrap$$
165     do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret'
166     trap "ret=129; $do_exit" 1
167     trap "ret=130; $do_exit" 2
168     trap "ret=141; $do_exit" 13
169     trap "ret=143; $do_exit" 15
170     mkdir $dirname || exit 1
171    
172     cd $dirname
173    
174     case $# in
175     0) "$prog" "$input" ;;
176     *) "$prog" "$@" "$input" ;;
177     esac
178     ret=$?
179    
180     if test $ret -eq 0; then
181     for from in *
182     do
183     to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"`
184     if test -f "$from"; then
185     # If $2 is an absolute path name, then just use that,
186     # otherwise prepend '../'.
187     case $to in
188     [\\/]* | ?:[\\/]*) target=$to;;
189     *) target=../$to;;
190     esac
191    
192     # Do not overwrite unchanged header files to avoid useless
193     # recompilations. Always update the parser itself: it is the
194     # destination of the .y.c rule in the Makefile. Divert the
195     # output of all other files to a temporary file so we can
196     # compare them to existing versions.
197     if test $from != $parser; then
198     realtarget=$target
199     target=tmp-`printf '%s\n' "$target" | sed 's|.*[\\/]||g'`
200     fi
201    
202     # Munge "#line" or "#" directives. Don't let the resulting
203     # debug information point at an absolute srcdir. Use the real
204     # output file name, not yy.lex.c for instance. Adjust the
205     # include guards too.
206     sed -e "/^#/!b" \
207     -e "s|$input_rx|$input_sub_rx|" \
208     -e "$sed_fix_filenames" \
209     -e "$sed_fix_header_guards" \
210     "$from" >"$target" || ret=$?
211    
212     # Check whether files must be updated.
213     if test "$from" != "$parser"; then
214     if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
215     echo "$to is unchanged"
216     rm -f "$target"
217     else
218     echo "updating $to"
219     mv -f "$target" "$realtarget"
220     fi
221     fi
222     else
223     # A missing file is only an error for the parser. This is a
224     # blatant hack to let us support using "yacc -d". If -d is not
225     # specified, don't fail when the header file is "missing".
226     if test "$from" = "$parser"; then
227     ret=1
228     fi
229     fi
230     done
231     fi
232    
233     # Remove the directory.
234     cd ..
235     rm -rf $dirname
236    
237     exit $ret
238    
239     # Local Variables:
240     # mode: shell-script
241     # sh-indentation: 2
242     # eval: (add-hook 'write-file-hooks 'time-stamp)
243     # time-stamp-start: "scriptversion="
244     # time-stamp-format: "%:y-%02m-%02d.%02H"
245     # time-stamp-time-zone: "UTC"
246     # time-stamp-end: "; # UTC"
247     # End:

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