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