#!/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
+#
+# Also edit some practices gcc -Wall finds questionable.
+#
+
input=$1
output=$2
tmp=/tmp/f$$
+inputh=`echo $input|sed 's:\.c$:.h:'`
+if grep '^#ifdef PERL_CORE' $inputh; then
+ : never mind
+else
+ echo "#ifdef PERL_CORE" > $tmp
+ sed -e 's:^typedef union {:#endif /* PERL_CORE */\
+\
+typedef union {:' $inputh >> $tmp
+ mv -f $tmp $inputh
+fi
+
+if grep 'yaccpar 1.8 (Berkeley)' $input >/dev/null 2>&1; then
+ cp $input $output
+ # Don't expect the diff to do everything -- do some by hand
+ if test -f perly_c.diff; then
+ patch -F3 $output <perly_c.diff
+ sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \
+ -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \
+ -e '/\[\] *= *[{]/s/^/static /' \
+ -e '/^static static/s/^static //' \
+ -e '/^#define.WORD/,/^#define.ARROW/d' \
+ -e '/^int.yydebug/,/^#define.yystacksize/d' \
+ -e 's/^yyerrlab:$//' \
+ -e 's/^ goto yyerrlab;//' \
+ -e 's/^yynewerror:$//' \
+ -e 's/^ goto yynewerror;//' \
+ -e 's|^static char yysccsid\(.*\)|/* static char yysccsid\1 */|' \
+ < $output > $tmp && mv -f $tmp $output || exit 1
+ rm -rf $input
+ echo "If you need to debug perly.c, you need to fix up the #line"
+ echo "directives yourself."
+ 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
+ sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \
+ -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \
+ -e '/\[\] *= *[{]/s/^/static /' \
+ -e '/^static static/s/^static //' \
+ -e '/^#define.WORD/,/^#define.ARROW/d' \
+ -e '/^int.yydebug/,/^#define.yystacksize/d' \
+ -e 's/^yyerrlab:$//' \
+ -e 's/^ goto yyerrlab;//' \
+ -e 's/^yynewerror:$//' \
+ -e 's/^ goto yynewerror;//' \
+ -e 's|^static char yysccsid\(.*\)|/* static char yysccsid\1 */|' \
+ < $output > $tmp && mv -f $tmp $output || exit 1
+ rm -rf $input
+ echo "If you need to debug perly.c, you need to fix up the #line"
+ echo "directives yourself."
+ 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\[ *YYMAXDEPTH *\] *;
+short[ ]*yys\[ *YYMAXDEPTH *\] *;
yyps *= *&yys\[ *-1 *\];
yypv *= *&yyv\[ *-1 *\];
-if *\( *\+\+yyps *> *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp
+if *\( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
+
set `wc -l $tmp`
+if test "$1" = "5"; then
+ plan="bsd43"
+fi
-case "$1" in
-5) echo "Patching perly.c to allow dynamic yacc stack allocation";;
-*) mv $input $output; rm -f $tmp; exit;;
-esac
+if test "$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 "$1" = "5"; then
+ plan="isc"
+ fi
+fi
+
+# ------
-cat >$tmp <<'END'
+case "$plan" in
+ ##################################################################
+ # The SunOS 4.0.2 version has the comparison fixed already.
+ # Also added are out of memory checks (makes porting the generated
+ # code easier) For most systems, it can't hurt. -- TD
+ "bsd43")
+ echo "Attempting to patch perly.c to allow dynamic yacc stack allocation"
+ echo "Assuming bsd4.3 yaccpar"
+ cat >$tmp <<'END'
/YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\
int yymaxdepth = YYMAXDEPTH;\
YYSTYPE *yyv; /* where the values are stored */\
/yypv *= *&yyv\[ *-1 *\];/c\
\ if (!yyv) {\
-\ yyv = (YYSTYPE*) malloc(yymaxdepth * sizeof(YYSTYPE));\
-\ yys = (short*) malloc(yymaxdepth * sizeof(short));\
+\ 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 *>=* *&yys\[ *YYMAXDEPTH *\] *)/c\
\ if( ++yyps >= maxyyps ) {\
\ int tv = yypv - yyv;\
\ int ts = yyps - yys;\
\
\ yymaxdepth *= 2;\
-\ yyv = (YYSTYPE*)realloc((char*)yyv,\
-\ yymaxdepth*sizeof(YYSTYPE));\
-\ yys = (short*)realloc((char*)yys,\
-\ yymaxdepth*sizeof(short));\
+\ 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 patch 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
-sed -f $tmp <$input >$output
+echo ""
rm -rf $tmp $input
https://perl5.git.perl.org / perl5.git / blobdiff