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Diffstat (limited to 'build-aux/yyrename')
-rwxr-xr-x | build-aux/yyrename | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/build-aux/yyrename b/build-aux/yyrename new file mode 100755 index 0000000..5e7b1db --- /dev/null +++ b/build-aux/yyrename @@ -0,0 +1,92 @@ +#! /bin/sh +# Rename yy.* identifiers to avoid name clashes. This file is part of Grecs. +# Copyright (C) 2011 Sergey Poznyakoff +# +# Grecs 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 3, or (at your option) +# any later version. +# +# Grecs 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 Grecs. If not, see <http://www.gnu.org/licenses/>. + +# Usage: yyrename [-f OUTFILE [OUTFILE...]] COMMAND INFILE +# Makefile.am: +# LEXCOMPILE = yyrename -f $(LEX_OUTPUT_ROOT).c \ +# '$(LEX) $(LFLAGS) $(AM_LFLAGS)' +# YACCCOMPILE = yyrename '$(YACC) $(YFLAGS) $(AM_YFLAGS)' +# +# This script runs COMMAND with INFILE as its argument and scans +# OUTFILEs for identifiers starting with 'yy'. These identifiers +# are renamed by replacing 'yy' with the selected prefix. +# +# The prefix is looked up in the file yytrans, located in the INFILE's +# directory. If this file does not exist, the prefix is constructed +# by concatenating the string 'grecs_' and the ``root name''. The root +# name is build by removing '-lex.l' or '-gram.y' from the base name. +# If the latter does not end in any of these, the root name +# is constructed by removing the suffix from the base name. +# +# The yytrans file is a line-oriented lookup table. Empty lines are +# ignored, usual UNIX comment lines are honored. The remaining lines +# must consist of two words separated by any amount of whitespace. +# The first word is a look-up key, the second one provides a translation +# (yy replacement) for that key. +# +# Two look-ups are tried: first the base name and then the root name. +# If both result in a non-empty replacement, the former is preferred +# over the latter. +# +# The -f option supplies a list of output file names generated by COMMAND. +# If not supplied, the following defaults are used: y.tab.c and y.tab.h, if +# INFILE ends in '.y', and yy.lex.c, if it ends in '.l'. If INFILE does not +# end in any of these suffixes, error is reported. +# +# BUGS: Any occurrence of 'yy' is replaced, not only 'yy' prefixes. +# +case $1 in +-f) files=$2 + shift + shift +esac + +base=`expr "$2" : '.*/\(.*\)\.[ly]'` +dir=`dirname "$2"` +case $2 in +*.y) test -z "$files" && files="y.tab.c y.tab.h" + root=`expr "$2" : '.*/\(.*\)-gram\.y'`;; +*.l) test -z "$files" && files=lex.yy.c + root=`expr "$2" : '.*/\(.*\)-lex\.l'`;; +*) if test -z "$files"; then + echo >&2 "$0: suffix unknown, files must be given (use -f)" + exit 1 + fi + root=$base +esac + +if test -f $dir/yytrans; then + pfx=`awk ' +{ sub(/#.*$/,"") } +NF == 2 && $1=="'$base'" { exact=$2 } +NF == 2 && $1=="'$root'" { root=$2 } +{ next } +END { print exact ? exact : root ? root : "" }' $dir/yytrans` +else + pfx= +fi +if test -z "$pfx"; then + pfx=grecs_`echo $root | tr .- __` +fi + +eval $* || exit $? + +for file in $files +do + mv $file ${file}.tmp + sed "s/yy/$pfx/g" ${file}.tmp > $file +done |