1#! /bin/sh 2# ylwrap - wrapper for lex/yacc invocations. 3 4scriptversion=2013-01-12.17; # UTC 5 6# Copyright (C) 1996-2014 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 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 64case "$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 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 ;; 95esac 96 97 98# The input. 99input=$1 100shift 101# We'll later need for a correct munging of "#line" directives. 102input_sub_rx=`get_dirname "$input" | quote_for_sed` 103case $input in 104 [\\/]* | ?:[\\/]*) 105 # Absolute path; do nothing. 106 ;; 107 *) 108 # Relative path. Make it absolute. 109 input=`pwd`/$input 110 ;; 111esac 112input_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. 117y_tab_nodot=false 118if test -f y_tab.c || test -f y_tab.h; then 119 y_tab_nodot=true 120fi 121 122# The parser itself, the first file, is the destination of the .y.c 123# rule in the Makefile. 124parser=$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. 129sed_fix_filenames= 130 131# Also rename header guards, as Bison 2.7 for instance uses its header 132# guard in its implementation file. 133sed_fix_header_guards= 134 135while 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;" 153done 154 155# The program to run. 156prog=$1 157shift 158# Make any relative path in $prog absolute. 159case $prog in 160 [\\/]* | ?:[\\/]*) ;; 161 *[\\/]*) prog=`pwd`/$prog ;; 162esac 163 164dirname=ylwrap$$ 165do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret' 166trap "ret=129; $do_exit" 1 167trap "ret=130; $do_exit" 2 168trap "ret=141; $do_exit" 13 169trap "ret=143; $do_exit" 15 170mkdir $dirname || exit 1 171 172cd $dirname 173 174case $# in 175 0) "$prog" "$input" ;; 176 *) "$prog" "$@" "$input" ;; 177esac 178ret=$? 179 180if 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 231fi 232 233# Remove the directory. 234cd .. 235rm -rf $dirname 236 237exit $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: 248