diff options
Diffstat (limited to 'ylwrap')
| -rwxr-xr-x | ylwrap | 185 |
1 files changed, 104 insertions, 81 deletions
@@ -1,10 +1,9 @@ #! /bin/sh # ylwrap - wrapper for lex/yacc invocations. -scriptversion=2011-08-25.18; # UTC +scriptversion=2012-12-21.17; # UTC -# Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005, -# 2007, 2009, 2010, 2011 Free Software Foundation, Inc. +# Copyright (C) 1996-2013 Free Software Foundation, Inc. # # Written by Tom Tromey <tromey@cygnus.com>. # @@ -30,9 +29,41 @@ scriptversion=2011-08-25.18; # UTC # 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 + echo "$0: No files given. Try '$0 --help' for more information." 1>&2 exit 1 ;; --basedir) @@ -67,6 +98,8 @@ 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 "$input" in [\\/]* | ?:[\\/]*) # Absolute path; do nothing. @@ -76,15 +109,47 @@ case "$input" in 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=$1 + +# A sed program to s/FROM/TO/g for all the FROM/TO so that, for +# instance, we rename #include "y.tab.h" into #include "parse.h" +# during the conversion from y.tab.c to parse.c. +sed_fix_filenames= + +# Also rename header guards, as Bison 2.7 for instance uses its header +# guard in its implementation file. +sed_fix_header_guards= -pairlist= while test "$#" -ne 0; do if test "$1" = "--"; then shift break fi - pairlist="$pairlist $1" + 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 "$to"`"|g;" done # The program to run. @@ -115,98 +180,56 @@ esac ret=$? if test $ret -eq 0; then - set X $pairlist - shift - first=yes - # Since DOS filename conventions don't allow two dots, - # the DOS version of Bison writes out y_tab.c instead of y.tab.c - # and y_tab.h instead of y.tab.h. Test to see if this is the case. - y_tab_nodot="no" - if test -f y_tab.c || test -f y_tab.h; then - y_tab_nodot="yes" - fi - - # The directory holding the input. - input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'` - # Quote $INPUT_DIR so we can use it in a regexp. - # FIXME: really we should care about more than `.' and `\'. - input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'` - - while test "$#" -ne 0; do - from="$1" - # Handle y_tab.c and y_tab.h output by DOS - if test $y_tab_nodot = "yes"; then - if test $from = "y.tab.c"; then - from="y_tab.c" - else - if test $from = "y.tab.h"; then - from="y_tab.h" - fi - fi - fi + for from in * + do + to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"` if test -f "$from"; then # If $2 is an absolute path name, then just use that, - # otherwise prepend `../'. - case "$2" in - [\\/]* | ?:[\\/]*) target="$2";; - *) target="../$2";; + # otherwise prepend '../'. + case $to in + [\\/]* | ?:[\\/]*) target=$to;; + *) target="../$to";; esac - # We do not want to overwrite a header file if it hasn't - # changed. This avoid useless recompilations. However the - # parser itself (the first file) should always be updated, - # because 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 $first = no; then + # 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-`echo $target | sed s/.*[\\/]//g`" + target=tmp-`printf '%s\n' "$target" | sed 's|.*[\\/]||g'` fi - # Edit out `#line' or `#' directives. - # - # We don't want the resulting debug information to point at - # an absolute srcdir; it is better for it to just mention the - # .y file with no path. - # - # We want to use the real output file name, not yy.lex.c for - # instance. - # - # We want the include guards to be adjusted too. - FROM=`echo "$from" | sed \ - -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\ - -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'` - TARGET=`echo "$2" | sed \ - -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\ - -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'` - - sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \ - -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$? - - # Check whether header files must be updated. - if test $first = no; then + + # Munge "#line" or "#" directives. Don't let the resulting + # debug information point at an absolute srcdir. Use the real + # output file name, not yy.lex.c for instance. Adjust the + # include guards too. + sed -e "/^#/!b" \ + -e "s|$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 "$2" is unchanged + echo "$to is unchanged" rm -f "$target" else - echo updating "$2" + echo "updating $to" mv -f "$target" "$realtarget" fi fi else - # A missing file is only an error for the first file. This - # is a blatant hack to let us support using "yacc -d". If -d - # is not specified, we don't want an error when the header - # file is "missing". - if test $first = yes; then + # A missing file is only an error for the parser. This is a + # blatant hack to let us support using "yacc -d". If -d is not + # specified, don't fail when the header file is "missing". + if test "$from" = "$parser"; then ret=1 fi fi - shift - shift - first=no done -else - ret=$? fi # Remove the directory. |