209 lines
5.8 KiB
Bash
Executable File
209 lines
5.8 KiB
Bash
Executable File
#!/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@lafvax.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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input=$1
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output=$2
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tmp=/tmp/f$$
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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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if test -f perly_c.diff; then
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patch -F3 $output <perly_c.diff
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rm -rf $input
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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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patch -F3 $output <perly.c.dif9
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rm -rf $input
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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 path 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 path 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
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