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Diffstat (limited to 'contrib/perl5/perly.fixer')
| -rwxr-xr-x | contrib/perl5/perly.fixer | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/contrib/perl5/perly.fixer b/contrib/perl5/perly.fixer new file mode 100755 index 0000000..afe1a38 --- /dev/null +++ b/contrib/perl5/perly.fixer @@ -0,0 +1,208 @@ +#!/bin/sh + +# Fix up yacc output to allow dynamic allocation. Since perly.c +# is now provided with the perl source, this should not be necessary. +# +# However, if the user wishes to use byacc, or wishes to try another +# compiler compiler (e.g. bison or yacc), this script will get run. +# See makefile run_byacc target for more details. +# +# Currently, only byacc version 1.8 is fully supported. +# +# Hacks to make it work with Interactive's SysVr3 Version 2.2 +# doughera@lafvax.lafayette.edu (Andy Dougherty) 3/23/91 +# +# Additional information to make the BSD section work with SunOS 4.0.2 +# tdinger@East.Sun.COM (Tom Dinger) 4/15/1991 + +input=$1 +output=$2 +tmp=/tmp/f$$ + +if grep 'yaccpar 1.8 (Berkeley)' $input >/dev/null 2>&1; then + cp $input $output + if test -f perly_c.diff; then + patch -F3 $output <perly_c.diff + rm -rf $input + fi + exit +elif grep 'yaccpar 1.9 (Berkeley)' $input >/dev/null 2>&1; then + if test -f perly.c.dif9; then + patch -F3 $output <perly.c.dif9 + rm -rf $input + exit 0 + else + echo "Diffs from byacc-1.9 are not available." + echo "If you wish to proceed anyway, do" + echo "cp $input $output" + echo "cp y.tab.h perly.h" + echo "and re-run make. Otherwise, I will use the old perly.c" + touch perly.c + # Exit with error status to stop make. + exit 1 + fi +fi + +plan="unknown" + +echo "" +echo "Warning: the yacc you have used is not directly supported by perl." +echo "The perly.fixer script will attempt to make some changes to the generated" +echo "file. The changes may be incomplete and that might lead to problems later" +echo "(especially with complex scripts). You may need to apply the changes" +echo "embedded in perl.fixer (and/or perly_c.dif*) by hand." +echo "" + +# Below, we check for various characteristic yaccpar outputs. + +# Test for BSD 4.3 version. +# Also tests for the SunOS 4.0.2 version +egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\]; +short[ ]*yys\[ *YYMAXDEPTH *\] *; +yyps *= *&yys\[ *-1 *\]; +yypv *= *&yyv\[ *-1 *\]; +if *\( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null + +set `wc -l $tmp` +if test "$1" = "5"; then + plan="bsd43" +fi + +if test "$plan" = "unknown"; then + # Test for ISC 2.2 version (probably generic SysVr3). +egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\]; +int[ ]*yys\[ *YYMAXDEPTH *\] *; +yyps *= *&yys\[ *-1 *\]; +yypv *= *&yyv\[ *-1 *\]; +if *\( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null + + set `wc -l $tmp` + if test "$1" = "5"; then + plan="isc" + fi +fi + +# ------ + +case "$plan" in + ################################################################## + # The SunOS 4.0.2 version has the comparison fixed already. + # Also added are out of memory checks (makes porting the generated + # code easier) For most systems, it can't hurt. -- TD + "bsd43") + echo "Attempting to path perly.c to allow dynamic yacc stack allocation" + echo "Assuming bsd4.3 yaccpar" + cat >$tmp <<'END' +/YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\ +int yymaxdepth = YYMAXDEPTH;\ +YYSTYPE *yyv; /* where the values are stored */\ +short *yys;\ +short *maxyyps; + +/short[ ]*yys\[ *YYMAXDEPTH *\] *;/d + +/yyps *= *&yys\[ *-1 *\];/d + +/yypv *= *&yyv\[ *-1 *\];/c\ +\ if (!yyv) {\ +\ New(73, yyv, yymaxdepth, YYSTYPE);\ +\ New(73, yys, yymaxdepth, short);\ +\ if ( !yyv || !yys ) {\ +\ yyerror( "out of memory" );\ +\ return(1);\ +\ }\ +\ maxyyps = &yys[yymaxdepth];\ +\ }\ +\ yyps = &yys[-1];\ +\ yypv = &yyv[-1]; + + +/if *( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *)/c\ +\ if( ++yyps >= maxyyps ) {\ +\ int tv = yypv - yyv;\ +\ int ts = yyps - yys;\ +\ +\ yymaxdepth *= 2;\ +\ Renew(yyv, yymaxdepth, YYSTYPE);\ +\ Renew(yys, yymaxdepth, short);\ +\ if ( !yyv || !yys ) {\ +\ yyerror( "yacc stack overflow" );\ +\ return(1);\ +\ }\ +\ yyps = yys + ts;\ +\ yypv = yyv + tv;\ +\ maxyyps = &yys[yymaxdepth];\ +\ } + +/yacc stack overflow.*}/d +/yacc stack overflow/,/}/d +END + if sed -f $tmp <$input >$output + then echo "The edit seems to have been applied okay." + else echo "The edit seems to have failed!" + fi + ;; + + ####################################################### + "isc") # Interactive Systems 2.2 version + echo "Attempting to path perly.c to allow dynamic yacc stack allocation" + echo "Assuming Interactive SysVr3 2.2 yaccpar" + # Easier to simply put whole script here than to modify the + # bsd script with sed. + # Main changes: yaccpar sometimes uses yy_ps and yy_pv + # which are local register variables. + # if(++yyps > YYMAXDEPTH) had opening brace on next line. + # I've kept that brace in along with a call to yyerror if + # realloc fails. (Actually, I just don't know how to do + # multi-line matches in sed.) + cat > $tmp << 'END' +/YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\ +int yymaxdepth = YYMAXDEPTH;\ +YYSTYPE *yyv; /* where the values are stored */\ +int *yys;\ +int *maxyyps; + +/int[ ]*yys\[ *YYMAXDEPTH *\] *;/d + +/yyps *= *&yys\[ *-1 *\];/d + +/yypv *= *&yyv\[ *-1 *\];/c\ +\ if (!yyv) {\ +\ New(73, yyv, yymaxdepth, YYSTYPE);\ +\ New(73, yys, yymaxdepth, int);\ +\ maxyyps = &yys[yymaxdepth];\ +\ }\ +\ yyps = &yys[-1];\ +\ yypv = &yyv[-1]; + +/if *( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *)/c\ +\ if( ++yy_ps >= maxyyps ) {\ +\ int tv = yy_pv - yyv;\ +\ int ts = yy_ps - yys;\ +\ +\ yymaxdepth *= 2;\ +\ Renew(yyv, yymaxdepth, YYSTYPE);\ +\ Renew(yys, yymaxdepth, int);\ +\ yy_ps = yyps = yys + ts;\ +\ yy_pv = yypv = yyv + tv;\ +\ maxyyps = &yys[yymaxdepth];\ +\ }\ +\ if (yyv == NULL || yys == NULL) +END + if sed -f $tmp < $input > $output + then echo "The edit seems to have been applied okay." + else echo "The edit seems to have failed!" + fi + ;; + + ###################################################### + # Plan still unknown + *) + echo "Unable to patch perly.c to allow dynamic yacc stack allocation (plan=$plan)" + # just do minimal change to write $output from $input + sed -e 's/Received token/ *** Received token/' $input >$output + ;; +esac + +echo "" +rm -rf $tmp $input |
