| 1 | #!/bin/sh
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| 2 |
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| 3 | # Fix up yacc output to allow dynamic allocation. Since perly.c
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| 4 | # is now provided with the perl source, this should not be necessary.
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| 5 | #
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| 6 | # However, if the user wishes to use byacc, or wishes to try another
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| 7 | # compiler compiler (e.g. bison or yacc), this script will get run.
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| 8 | # See makefile run_byacc target for more details.
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| 9 | #
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| 10 | # Currently, only byacc version 1.8 is fully supported.
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| 11 | #
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| 12 | # Hacks to make it work with Interactive's SysVr3 Version 2.2
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| 13 | # doughera@lafayette.edu (Andy Dougherty) 3/23/91
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| 14 | #
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| 15 | # Additional information to make the BSD section work with SunOS 4.0.2
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| 16 | # tdinger@East.Sun.COM (Tom Dinger) 4/15/1991
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| 17 | #
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| 18 | # Also edit some practices gcc -Wall finds questionable.
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| 19 | #
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| 20 |
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| 21 | gnupatch=patch
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| 22 | . ./config.sh
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| 23 |
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| 24 | input=$1
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| 25 | output=$2
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| 26 | tmp=perly$$
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| 27 |
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| 28 | inputh=`echo $input|sed 's:\.c$:.h:'`
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| 29 | if grep '^#ifdef PERL_CORE' $inputh; then
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| 30 | : never mind
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| 31 | else
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| 32 | echo "#ifdef PERL_CORE" > $tmp
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| 33 | sed -e 's:^typedef union {:#endif /* PERL_CORE */\
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| 34 | \
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| 35 | typedef union {:' $inputh >> $tmp
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| 36 | mv -f $tmp $inputh
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| 37 | fi
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| 38 |
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| 39 | if grep 'yaccpar 1.8 (Berkeley)' $input >/dev/null 2>&1; then
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| 40 | cp $input $output
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| 41 | # Don't expect the diff to do everything -- do some by hand
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| 42 | if test -f perly_c.diff; then
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| 43 | $gnupatch -F3 $output <perly_c.diff
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| 44 | sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \
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| 45 | -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \
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| 46 | -e '/\[\] *= *[{]/s/^/static /' \
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| 47 | -e '/^static static/s/^static //' \
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| 48 | -e '/^#define.WORD/,/^#define.ARROW/d' \
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| 49 | -e '/^int.yydebug/,/^#define.yystacksize/d' \
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| 50 | -e 's/^yyerrlab:$//' \
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| 51 | -e 's/^ goto yyerrlab;//' \
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| 52 | -e 's/^yynewerror:$//' \
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| 53 | -e 's/^ goto yynewerror;//' \
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| 54 | -e 's|^static char yysccsid\(.*\)|/* static char yysccsid\1 */|' \
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| 55 | -e 's|deprecate(|deprecate_old(|' \
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| 56 | < $output > $tmp && mv -f $tmp $output || exit 1
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| 57 | rm -rf $input
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| 58 | echo "If you need to debug perly.c, you need to fix up the #line"
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| 59 | echo "directives yourself."
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| 60 | fi
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| 61 | exit
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| 62 | elif grep 'yaccpar 1.9 (Berkeley)' $input >/dev/null 2>&1; then
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| 63 | if test -f perly.c.dif9; then
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| 64 | $gnupatch -F3 $output <perly.c.dif9
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| 65 | sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \
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| 66 | -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \
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| 67 | -e '/\[\] *= *[{]/s/^/static /' \
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| 68 | -e '/^static static/s/^static //' \
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| 69 | -e '/^#define.WORD/,/^#define.ARROW/d' \
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| 70 | -e '/^int.yydebug/,/^#define.yystacksize/d' \
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| 71 | -e 's/^yyerrlab:$//' \
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| 72 | -e 's/^ goto yyerrlab;//' \
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| 73 | -e 's/^yynewerror:$//' \
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| 74 | -e 's/^ goto yynewerror;//' \
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| 75 | -e 's|^static char yysccsid\(.*\)|/* static char yysccsid\1 */|' \
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| 76 | -e 's|deprecate(|deprecate_old(|' \
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| 77 | < $output > $tmp && mv -f $tmp $output || exit 1
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| 78 | rm -rf $input
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| 79 | echo "If you need to debug perly.c, you need to fix up the #line"
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| 80 | echo "directives yourself."
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| 81 | exit 0
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| 82 | else
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| 83 | echo "Diffs from byacc-1.9 are not available."
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| 84 | echo "If you wish to proceed anyway, do"
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| 85 | echo "cp $input $output"
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| 86 | echo "cp y.tab.h perly.h"
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| 87 | echo "and re-run make. Otherwise, I will use the old perly.c"
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| 88 | touch perly.c
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| 89 | # Exit with error status to stop make.
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| 90 | exit 1
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| 91 | fi
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| 92 | fi
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| 93 |
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| 94 | plan="unknown"
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| 95 |
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| 96 | echo ""
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| 97 | echo "Warning: the yacc you have used is not directly supported by perl."
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| 98 | echo "The perly.fixer script will attempt to make some changes to the generated"
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| 99 | echo "file. The changes may be incomplete and that might lead to problems later"
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| 100 | echo "(especially with complex scripts). You may need to apply the changes"
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| 101 | echo "embedded in perl.fixer (and/or perly_c.dif*) by hand."
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| 102 | echo ""
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| 103 |
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| 104 | # Below, we check for various characteristic yaccpar outputs.
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| 105 |
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| 106 | # Test for BSD 4.3 version.
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| 107 | # Also tests for the SunOS 4.0.2 version
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| 108 | egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];
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| 109 | short[ ]*yys\[ *YYMAXDEPTH *\] *;
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| 110 | yyps *= *&yys\[ *-1 *\];
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| 111 | yypv *= *&yyv\[ *-1 *\];
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| 112 | if *\( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
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| 113 |
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| 114 | set `wc -l $tmp`
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| 115 | if test "$1" = "5"; then
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| 116 | plan="bsd43"
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| 117 | fi
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| 118 |
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| 119 | if test "$plan" = "unknown"; then
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| 120 | # Test for ISC 2.2 version (probably generic SysVr3).
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| 121 | egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];
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| 122 | int[ ]*yys\[ *YYMAXDEPTH *\] *;
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| 123 | yyps *= *&yys\[ *-1 *\];
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| 124 | yypv *= *&yyv\[ *-1 *\];
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| 125 | if *\( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
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| 126 |
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| 127 | set `wc -l $tmp`
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| 128 | if test "$1" = "5"; then
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| 129 | plan="isc"
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| 130 | fi
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| 131 | fi
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| 132 |
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| 133 | # ------
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| 134 |
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| 135 | case "$plan" in
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| 136 | ##################################################################
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| 137 | # The SunOS 4.0.2 version has the comparison fixed already.
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| 138 | # Also added are out of memory checks (makes porting the generated
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| 139 | # code easier) For most systems, it can't hurt. -- TD
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| 140 | "bsd43")
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| 141 | echo "Attempting to patch perly.c to allow dynamic yacc stack allocation"
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| 142 | echo "Assuming bsd4.3 yaccpar"
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| 143 | cat >$tmp <<'END'
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| 144 | /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\
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| 145 | int yymaxdepth = YYMAXDEPTH;\
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| 146 | YYSTYPE *yyv; /* where the values are stored */\
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| 147 | short *yys;\
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| 148 | short *maxyyps;
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| 149 |
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| 150 | /short[ ]*yys\[ *YYMAXDEPTH *\] *;/d
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| 151 |
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| 152 | /yyps *= *&yys\[ *-1 *\];/d
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| 153 |
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| 154 | /yypv *= *&yyv\[ *-1 *\];/c\
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| 155 | \ if (!yyv) {\
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| 156 | \ New(73, yyv, yymaxdepth, YYSTYPE);\
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| 157 | \ New(73, yys, yymaxdepth, short);\
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| 158 | \ if ( !yyv || !yys ) {\
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| 159 | \ yyerror( "out of memory" );\
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| 160 | \ return(1);\
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| 161 | \ }\
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| 162 | \ maxyyps = &yys[yymaxdepth];\
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| 163 | \ }\
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| 164 | \ yyps = &yys[-1];\
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| 165 | \ yypv = &yyv[-1];
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| 166 |
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| 167 |
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| 168 | /if *( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *)/c\
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| 169 | \ if( ++yyps >= maxyyps ) {\
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| 170 | \ int tv = yypv - yyv;\
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| 171 | \ int ts = yyps - yys;\
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| 172 | \
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| 173 | \ yymaxdepth *= 2;\
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| 174 | \ Renew(yyv, yymaxdepth, YYSTYPE);\
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| 175 | \ Renew(yys, yymaxdepth, short);\
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| 176 | \ if ( !yyv || !yys ) {\
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| 177 | \ yyerror( "yacc stack overflow" );\
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| 178 | \ return(1);\
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| 179 | \ }\
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| 180 | \ yyps = yys + ts;\
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| 181 | \ yypv = yyv + tv;\
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| 182 | \ maxyyps = &yys[yymaxdepth];\
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| 183 | \ }
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| 184 |
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| 185 | /yacc stack overflow.*}/d
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| 186 | /yacc stack overflow/,/}/d
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| 187 | END
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| 188 | if sed -f $tmp <$input >$output
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| 189 | then echo "The edit seems to have been applied okay."
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| 190 | else echo "The edit seems to have failed!"
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| 191 | fi
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| 192 | ;;
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| 193 |
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| 194 | #######################################################
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| 195 | "isc") # Interactive Systems 2.2 version
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| 196 | echo "Attempting to patch perly.c to allow dynamic yacc stack allocation"
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| 197 | echo "Assuming Interactive SysVr3 2.2 yaccpar"
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| 198 | # Easier to simply put whole script here than to modify the
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| 199 | # bsd script with sed.
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| 200 | # Main changes: yaccpar sometimes uses yy_ps and yy_pv
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| 201 | # which are local register variables.
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| 202 | # if(++yyps > YYMAXDEPTH) had opening brace on next line.
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| 203 | # I've kept that brace in along with a call to yyerror if
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| 204 | # realloc fails. (Actually, I just don't know how to do
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| 205 | # multi-line matches in sed.)
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| 206 | cat > $tmp << 'END'
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| 207 | /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\
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| 208 | int yymaxdepth = YYMAXDEPTH;\
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| 209 | YYSTYPE *yyv; /* where the values are stored */\
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| 210 | int *yys;\
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| 211 | int *maxyyps;
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| 212 |
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| 213 | /int[ ]*yys\[ *YYMAXDEPTH *\] *;/d
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| 214 |
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| 215 | /yyps *= *&yys\[ *-1 *\];/d
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| 216 |
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| 217 | /yypv *= *&yyv\[ *-1 *\];/c\
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| 218 | \ if (!yyv) {\
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| 219 | \ New(73, yyv, yymaxdepth, YYSTYPE);\
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| 220 | \ New(73, yys, yymaxdepth, int);\
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| 221 | \ maxyyps = &yys[yymaxdepth];\
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| 222 | \ }\
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| 223 | \ yyps = &yys[-1];\
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| 224 | \ yypv = &yyv[-1];
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| 225 |
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| 226 | /if *( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *)/c\
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| 227 | \ if( ++yy_ps >= maxyyps ) {\
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| 228 | \ int tv = yy_pv - yyv;\
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| 229 | \ int ts = yy_ps - yys;\
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| 230 | \
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| 231 | \ yymaxdepth *= 2;\
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| 232 | \ Renew(yyv, yymaxdepth, YYSTYPE);\
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| 233 | \ Renew(yys, yymaxdepth, int);\
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| 234 | \ yy_ps = yyps = yys + ts;\
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| 235 | \ yy_pv = yypv = yyv + tv;\
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| 236 | \ maxyyps = &yys[yymaxdepth];\
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| 237 | \ }\
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| 238 | \ if (yyv == NULL || yys == NULL)
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| 239 | END
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| 240 | if sed -f $tmp < $input > $output
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| 241 | then echo "The edit seems to have been applied okay."
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| 242 | else echo "The edit seems to have failed!"
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| 243 | fi
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| 244 | ;;
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| 245 |
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| 246 | ######################################################
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| 247 | # Plan still unknown
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| 248 | *)
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| 249 | echo "Unable to patch perly.c to allow dynamic yacc stack allocation (plan=$plan)"
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| 250 | # just do minimal change to write $output from $input
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| 251 | sed -e 's/Received token/ *** Received token/' $input >$output
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| 252 | ;;
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| 253 | esac
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| 254 |
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| 255 | echo ""
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| 256 | rm -rf $tmp $input
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