diff options
Diffstat (limited to 'ylwrap')
| -rwxr-xr-x | ylwrap | 247 |
1 files changed, 247 insertions, 0 deletions
@@ -0,0 +1,247 @@ +#! /bin/sh +# ylwrap - wrapper for lex/yacc invocations. + +scriptversion=2018-03-07.03; # UTC + +# Copyright (C) 1996-2018 Free Software Foundation, Inc. +# +# Written by Tom Tromey <tromey@cygnus.com>. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <https://www.gnu.org/licenses/>. + +# As a special exception to the GNU General Public License, if you +# distribute this file as part of a program that contains a +# configuration script generated by Autoconf, you may include it under +# the same distribution terms that you use for the rest of that program. + +# This file is maintained in Automake, please report +# bugs to <bug-automake@gnu.org> or send patches to +# <automake-patches@gnu.org>. + +get_dirname () +{ + case $1 in + */*|*\\*) printf '%s\n' "$1" | sed -e 's|\([\\/]\)[^\\/]*$|\1|';; + # Otherwise, we want the empty string (not "."). + esac +} + +# guard FILE +# ---------- +# The CPP macro used to guard inclusion of FILE. +guard () +{ + printf '%s\n' "$1" \ + | sed \ + -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \ + -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g' \ + -e 's/__*/_/g' +} + +# quote_for_sed [STRING] +# ---------------------- +# Return STRING (or stdin) quoted to be used as a sed pattern. +quote_for_sed () +{ + case $# in + 0) cat;; + 1) printf '%s\n' "$1";; + esac \ + | sed -e 's|[][\\.*]|\\&|g' +} + +case "$1" in + '') + echo "$0: No files given. Try '$0 --help' for more information." 1>&2 + exit 1 + ;; + --basedir) + basedir=$2 + shift 2 + ;; + -h|--h*) + cat <<\EOF +Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]... + +Wrapper for lex/yacc invocations, renaming files as desired. + + INPUT is the input file + OUTPUT is one file PROG generates + DESIRED is the file we actually want instead of OUTPUT + PROGRAM is program to run + ARGS are passed to PROG + +Any number of OUTPUT,DESIRED pairs may be used. + +Report bugs to <bug-automake@gnu.org>. +EOF + exit $? + ;; + -v|--v*) + echo "ylwrap $scriptversion" + exit $? + ;; +esac + + +# The input. +input=$1 +shift +# We'll later need for a correct munging of "#line" directives. +input_sub_rx=`get_dirname "$input" | quote_for_sed` +case $input in + [\\/]* | ?:[\\/]*) + # Absolute path; do nothing. + ;; + *) + # Relative path. Make it absolute. + input=`pwd`/$input + ;; +esac +input_rx=`get_dirname "$input" | quote_for_sed` + +# Since DOS filename conventions don't allow two dots, +# the DOS version of Bison writes out y_tab.c instead of y.tab.c +# and y_tab.h instead of y.tab.h. Test to see if this is the case. +y_tab_nodot=false +if test -f y_tab.c || test -f y_tab.h; then + y_tab_nodot=true +fi + +# The parser itself, the first file, is the destination of the .y.c +# rule in the Makefile. +parser=$1 + +# A sed program to s/FROM/TO/g for all the FROM/TO so that, for +# instance, we rename #include "y.tab.h" into #include "parse.h" +# during the conversion from y.tab.c to parse.c. +sed_fix_filenames= + +# Also rename header guards, as Bison 2.7 for instance uses its header +# guard in its implementation file. +sed_fix_header_guards= + +while test $# -ne 0; do + if test x"$1" = x"--"; then + shift + break + fi + from=$1 + # Handle y_tab.c and y_tab.h output by DOS + if $y_tab_nodot; then + case $from in + "y.tab.c") from=y_tab.c;; + "y.tab.h") from=y_tab.h;; + esac + fi + shift + to=$1 + shift + sed_fix_filenames="${sed_fix_filenames}s|"`quote_for_sed "$from"`"|$to|g;" + sed_fix_header_guards="${sed_fix_header_guards}s|"`guard "$from"`"|"`guard "$to"`"|g;" +done + +# The program to run. +prog=$1 +shift +# Make any relative path in $prog absolute. +case $prog in + [\\/]* | ?:[\\/]*) ;; + *[\\/]*) prog=`pwd`/$prog ;; +esac + +dirname=ylwrap$$ +do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret' +trap "ret=129; $do_exit" 1 +trap "ret=130; $do_exit" 2 +trap "ret=141; $do_exit" 13 +trap "ret=143; $do_exit" 15 +mkdir $dirname || exit 1 + +cd $dirname + +case $# in + 0) "$prog" "$input" ;; + *) "$prog" "$@" "$input" ;; +esac +ret=$? + +if test $ret -eq 0; then + for from in * + do + to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"` + if test -f "$from"; then + # If $2 is an absolute path name, then just use that, + # otherwise prepend '../'. + case $to in + [\\/]* | ?:[\\/]*) target=$to;; + *) target=../$to;; + esac + + # Do not overwrite unchanged header files to avoid useless + # recompilations. Always update the parser itself: it is the + # destination of the .y.c rule in the Makefile. Divert the + # output of all other files to a temporary file so we can + # compare them to existing versions. + if test $from != $parser; then + realtarget=$target + target=tmp-`printf '%s\n' "$target" | sed 's|.*[\\/]||g'` + fi + + # Munge "#line" or "#" directives. Don't let the resulting + # debug information point at an absolute srcdir. Use the real + # output file name, not yy.lex.c for instance. Adjust the + # include guards too. + sed -e "/^#/!b" \ + -e "s|$input_rx|$input_sub_rx|" \ + -e "$sed_fix_filenames" \ + -e "$sed_fix_header_guards" \ + "$from" >"$target" || ret=$? + + # Check whether files must be updated. + if test "$from" != "$parser"; then + if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then + echo "$to is unchanged" + rm -f "$target" + else + echo "updating $to" + mv -f "$target" "$realtarget" + fi + fi + else + # A missing file is only an error for the parser. This is a + # blatant hack to let us support using "yacc -d". If -d is not + # specified, don't fail when the header file is "missing". + if test "$from" = "$parser"; then + ret=1 + fi + fi + done +fi + +# Remove the directory. +cd .. +rm -rf $dirname + +exit $ret + +# Local Variables: +# mode: shell-script +# sh-indentation: 2 +# eval: (add-hook 'before-save-hook 'time-stamp) +# time-stamp-start: "scriptversion=" +# time-stamp-format: "%:y-%02m-%02d.%02H" +# time-stamp-time-zone: "UTC0" +# time-stamp-end: "; # UTC" +# End: |