| 1 | #!/bin/sh |
| 2 | |
| 3 | # Fix up yacc output to allow dynamic allocation. Since perly.c |
| 4 | # is now provided with the perl source, this should not be necessary. |
| 5 | # |
| 6 | # However, if the user wishes to use byacc, or wishes to try another |
| 7 | # compiler compiler (e.g. bison or yacc), this script will get run. |
| 8 | # See makefile run_byacc target for more details. |
| 9 | # |
| 10 | # Currently, only byacc version 1.8 is fully supported. |
| 11 | # |
| 12 | # Hacks to make it work with Interactive's SysVr3 Version 2.2 |
| 13 | # doughera@lafvax.lafayette.edu (Andy Dougherty) 3/23/91 |
| 14 | # |
| 15 | # Additional information to make the BSD section work with SunOS 4.0.2 |
| 16 | # tdinger@East.Sun.COM (Tom Dinger) 4/15/1991 |
| 17 | |
| 18 | input=$1 |
| 19 | output=$2 |
| 20 | tmp=/tmp/f$$ |
| 21 | |
| 22 | if grep 'yaccpar 1.8 (Berkeley)' $input >/dev/null 2>&1; then |
| 23 | cp $input $output |
| 24 | # Don't expect the diff to do everything -- do some by hand |
| 25 | if test -f perly_c.diff; then |
| 26 | patch -F3 $output <perly_c.diff |
| 27 | sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \ |
| 28 | -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \ |
| 29 | -e '/\[\] *= *[{]/s/^/static /' \ |
| 30 | -e '/^static static/s/^static //' \ |
| 31 | -e '/^#define.WORD/,/^#define.ARROW/d' \ |
| 32 | -e '/^int.yydebug/,/^#define.yystacksize/d' \ |
| 33 | < $output > $tmp && mv -f $tmp $output || exit 1 |
| 34 | rm -rf $input |
| 35 | echo "If you need to debug perly.c, you need to fix up the #line" |
| 36 | echo "directives yourself." |
| 37 | fi |
| 38 | exit |
| 39 | elif grep 'yaccpar 1.9 (Berkeley)' $input >/dev/null 2>&1; then |
| 40 | if test -f perly.c.dif9; then |
| 41 | patch -F3 $output <perly.c.dif9 |
| 42 | sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \ |
| 43 | -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \ |
| 44 | -e '/\[\] *= *[{]/s/^/static /' \ |
| 45 | -e '/^static static/s/^static //' \ |
| 46 | -e '/^#define.WORD/,/^#define.ARROW/d' \ |
| 47 | -e '/^int.yydebug/,/^#define.yystacksize/d' \ |
| 48 | < $output > $tmp && mv -f $tmp $output || exit 1 |
| 49 | rm -rf $input |
| 50 | echo "If you need to debug perly.c, you need to fix up the #line" |
| 51 | echo "directives yourself." |
| 52 | exit 0 |
| 53 | else |
| 54 | echo "Diffs from byacc-1.9 are not available." |
| 55 | echo "If you wish to proceed anyway, do" |
| 56 | echo "cp $input $output" |
| 57 | echo "cp y.tab.h perly.h" |
| 58 | echo "and re-run make. Otherwise, I will use the old perly.c" |
| 59 | touch perly.c |
| 60 | # Exit with error status to stop make. |
| 61 | exit 1 |
| 62 | fi |
| 63 | fi |
| 64 | |
| 65 | plan="unknown" |
| 66 | |
| 67 | echo "" |
| 68 | echo "Warning: the yacc you have used is not directly supported by perl." |
| 69 | echo "The perly.fixer script will attempt to make some changes to the generated" |
| 70 | echo "file. The changes may be incomplete and that might lead to problems later" |
| 71 | echo "(especially with complex scripts). You may need to apply the changes" |
| 72 | echo "embedded in perl.fixer (and/or perly_c.dif*) by hand." |
| 73 | echo "" |
| 74 | |
| 75 | # Below, we check for various characteristic yaccpar outputs. |
| 76 | |
| 77 | # Test for BSD 4.3 version. |
| 78 | # Also tests for the SunOS 4.0.2 version |
| 79 | egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\]; |
| 80 | short[ ]*yys\[ *YYMAXDEPTH *\] *; |
| 81 | yyps *= *&yys\[ *-1 *\]; |
| 82 | yypv *= *&yyv\[ *-1 *\]; |
| 83 | if *\( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null |
| 84 | |
| 85 | set `wc -l $tmp` |
| 86 | if test "$1" = "5"; then |
| 87 | plan="bsd43" |
| 88 | fi |
| 89 | |
| 90 | if test "$plan" = "unknown"; then |
| 91 | # Test for ISC 2.2 version (probably generic SysVr3). |
| 92 | egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\]; |
| 93 | int[ ]*yys\[ *YYMAXDEPTH *\] *; |
| 94 | yyps *= *&yys\[ *-1 *\]; |
| 95 | yypv *= *&yyv\[ *-1 *\]; |
| 96 | if *\( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null |
| 97 | |
| 98 | set `wc -l $tmp` |
| 99 | if test "$1" = "5"; then |
| 100 | plan="isc" |
| 101 | fi |
| 102 | fi |
| 103 | |
| 104 | # ------ |
| 105 | |
| 106 | case "$plan" in |
| 107 | ################################################################## |
| 108 | # The SunOS 4.0.2 version has the comparison fixed already. |
| 109 | # Also added are out of memory checks (makes porting the generated |
| 110 | # code easier) For most systems, it can't hurt. -- TD |
| 111 | "bsd43") |
| 112 | echo "Attempting to patch perly.c to allow dynamic yacc stack allocation" |
| 113 | echo "Assuming bsd4.3 yaccpar" |
| 114 | cat >$tmp <<'END' |
| 115 | /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\ |
| 116 | int yymaxdepth = YYMAXDEPTH;\ |
| 117 | YYSTYPE *yyv; /* where the values are stored */\ |
| 118 | short *yys;\ |
| 119 | short *maxyyps; |
| 120 | |
| 121 | /short[ ]*yys\[ *YYMAXDEPTH *\] *;/d |
| 122 | |
| 123 | /yyps *= *&yys\[ *-1 *\];/d |
| 124 | |
| 125 | /yypv *= *&yyv\[ *-1 *\];/c\ |
| 126 | \ if (!yyv) {\ |
| 127 | \ New(73, yyv, yymaxdepth, YYSTYPE);\ |
| 128 | \ New(73, yys, yymaxdepth, short);\ |
| 129 | \ if ( !yyv || !yys ) {\ |
| 130 | \ yyerror( "out of memory" );\ |
| 131 | \ return(1);\ |
| 132 | \ }\ |
| 133 | \ maxyyps = &yys[yymaxdepth];\ |
| 134 | \ }\ |
| 135 | \ yyps = &yys[-1];\ |
| 136 | \ yypv = &yyv[-1]; |
| 137 | |
| 138 | |
| 139 | /if *( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *)/c\ |
| 140 | \ if( ++yyps >= maxyyps ) {\ |
| 141 | \ int tv = yypv - yyv;\ |
| 142 | \ int ts = yyps - yys;\ |
| 143 | \ |
| 144 | \ yymaxdepth *= 2;\ |
| 145 | \ Renew(yyv, yymaxdepth, YYSTYPE);\ |
| 146 | \ Renew(yys, yymaxdepth, short);\ |
| 147 | \ if ( !yyv || !yys ) {\ |
| 148 | \ yyerror( "yacc stack overflow" );\ |
| 149 | \ return(1);\ |
| 150 | \ }\ |
| 151 | \ yyps = yys + ts;\ |
| 152 | \ yypv = yyv + tv;\ |
| 153 | \ maxyyps = &yys[yymaxdepth];\ |
| 154 | \ } |
| 155 | |
| 156 | /yacc stack overflow.*}/d |
| 157 | /yacc stack overflow/,/}/d |
| 158 | END |
| 159 | if sed -f $tmp <$input >$output |
| 160 | then echo "The edit seems to have been applied okay." |
| 161 | else echo "The edit seems to have failed!" |
| 162 | fi |
| 163 | ;; |
| 164 | |
| 165 | ####################################################### |
| 166 | "isc") # Interactive Systems 2.2 version |
| 167 | echo "Attempting to patch perly.c to allow dynamic yacc stack allocation" |
| 168 | echo "Assuming Interactive SysVr3 2.2 yaccpar" |
| 169 | # Easier to simply put whole script here than to modify the |
| 170 | # bsd script with sed. |
| 171 | # Main changes: yaccpar sometimes uses yy_ps and yy_pv |
| 172 | # which are local register variables. |
| 173 | # if(++yyps > YYMAXDEPTH) had opening brace on next line. |
| 174 | # I've kept that brace in along with a call to yyerror if |
| 175 | # realloc fails. (Actually, I just don't know how to do |
| 176 | # multi-line matches in sed.) |
| 177 | cat > $tmp << 'END' |
| 178 | /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\ |
| 179 | int yymaxdepth = YYMAXDEPTH;\ |
| 180 | YYSTYPE *yyv; /* where the values are stored */\ |
| 181 | int *yys;\ |
| 182 | int *maxyyps; |
| 183 | |
| 184 | /int[ ]*yys\[ *YYMAXDEPTH *\] *;/d |
| 185 | |
| 186 | /yyps *= *&yys\[ *-1 *\];/d |
| 187 | |
| 188 | /yypv *= *&yyv\[ *-1 *\];/c\ |
| 189 | \ if (!yyv) {\ |
| 190 | \ New(73, yyv, yymaxdepth, YYSTYPE);\ |
| 191 | \ New(73, yys, yymaxdepth, int);\ |
| 192 | \ maxyyps = &yys[yymaxdepth];\ |
| 193 | \ }\ |
| 194 | \ yyps = &yys[-1];\ |
| 195 | \ yypv = &yyv[-1]; |
| 196 | |
| 197 | /if *( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *)/c\ |
| 198 | \ if( ++yy_ps >= maxyyps ) {\ |
| 199 | \ int tv = yy_pv - yyv;\ |
| 200 | \ int ts = yy_ps - yys;\ |
| 201 | \ |
| 202 | \ yymaxdepth *= 2;\ |
| 203 | \ Renew(yyv, yymaxdepth, YYSTYPE);\ |
| 204 | \ Renew(yys, yymaxdepth, int);\ |
| 205 | \ yy_ps = yyps = yys + ts;\ |
| 206 | \ yy_pv = yypv = yyv + tv;\ |
| 207 | \ maxyyps = &yys[yymaxdepth];\ |
| 208 | \ }\ |
| 209 | \ if (yyv == NULL || yys == NULL) |
| 210 | END |
| 211 | if sed -f $tmp < $input > $output |
| 212 | then echo "The edit seems to have been applied okay." |
| 213 | else echo "The edit seems to have failed!" |
| 214 | fi |
| 215 | ;; |
| 216 | |
| 217 | ###################################################### |
| 218 | # Plan still unknown |
| 219 | *) |
| 220 | echo "Unable to patch perly.c to allow dynamic yacc stack allocation (plan=$plan)" |
| 221 | # just do minimal change to write $output from $input |
| 222 | sed -e 's/Received token/ *** Received token/' $input >$output |
| 223 | ;; |
| 224 | esac |
| 225 | |
| 226 | echo "" |
| 227 | rm -rf $tmp $input |