1 #! /bin/sh 2 # ylwrap - wrapper for lex/yacc invocations. 3 4 scriptversion=2013-01-12.17; # UTC 5 6 # Copyright (C) 1996-2014 Free Software Foundation, Inc. 7 # 8 # Written by Tom Tromey <tromey (at] 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 (at] gnu.org> or send patches to 30 # <automake-patches (at] 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 # The parser itself, the first file, is the destination of the .y.c 115 # rule in the Makefile. 116 parser=$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. 121 sed_fix_filenames= 122 123 # Also rename header guards, as Bison 2.7 for instance uses its header 124 # guard in its implementation file. 125 sed_fix_header_guards= 126 127 while test $# -ne 0; do 128 if test x"$1" = x"--"; then 129 shift 130 break 131 fi 132 from=$1 133 shift 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;" 138 done 139 140 # The program to run. 141 prog=$1 142 shift 143 # Make any relative path in $prog absolute. 144 case $prog in 145 [\\/]* | ?:[\\/]*) ;; 146 *[\\/]*) prog=`pwd`/$prog ;; 147 esac 148 149 dirname=ylwrap$$ 150 do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret' 151 trap "ret=129; $do_exit" 1 152 trap "ret=130; $do_exit" 2 153 trap "ret=141; $do_exit" 13 154 trap "ret=143; $do_exit" 15 155 mkdir $dirname || exit 1 156 157 cd $dirname 158 159 case $# in 160 0) "$prog" "$input" ;; 161 *) "$prog" "$@" "$input" ;; 162 esac 163 ret=$? 164 165 if test $ret -eq 0; then 166 for from in * 167 do 168 to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"` 169 if test -f "$from"; then 170 # If $2 is an absolute path name, then just use that, 171 # otherwise prepend '../'. 172 case $to in 173 [\\/]* | ?:[\\/]*) target=$to;; 174 *) target=../$to;; 175 esac 176 177 # 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' "$target" | sed 's|.*[\\/]||g'` 185 fi 186 187 # Munge "#line" or "#" directives. Don't let the resulting 188 # debug information point at an absolute srcdir. Use the real 189 # output file name, not yy.lex.c for instance. Adjust the 190 # include guards too. 191 sed -e "/^#/!b" \ 192 -e "s|$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 $to" 204 mv -f "$target" "$realtarget" 205 fi 206 fi 207 else 208 # A missing file is only an error for the parser. This is a 209 # blatant hack to let us support using "yacc -d". If -d is not 210 # specified, don't fail when the header file is "missing". 211 if test "$from" = "$parser"; then 212 ret=1 213 fi 214 fi 215 done 216 fi 217 218 # Remove the directory. 219 cd .. 220 rm -rf $dirname 221 222 exit $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" 230 # time-stamp-time-zone: "UTC" 231 # time-stamp-end: "; # UTC" 232 # End: 233
