#!/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.
+#
+# Currently, only byacc version 1.8 is 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
input=$1
output=$2
tmp=/tmp/f$$
+if grep 'yaccpar 1.8 (Berkeley)' $input >/dev/null 2>&1; then
+ cp $input $output
+ if test -f perly.c.diff; then
+ patch -F3 $output <perly.c.diff
+ rm -rf $input
+ 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
+ rm -rf $input
+ 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"
+# Below, we check for various yaccpar outputs.
+
# Test for BSD 4.3 version.
+# Also tests for the SunOS 4.0.2 version
egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];
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 "$1" = "5"; then
fi
if test "$plan" = "unknown"; then
- # Test for ISC 2.2 version.
+ # 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
+if *\( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
set `wc -l $tmp`
if test "$1" = "5"; then
fi
case "$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 "Patching perly.c to allow dynamic yacc stack allocation"
echo "Assuming bsd4.3 yaccpar"
/yypv *= *&yyv\[ *-1 *\];/c\
\ if (!yyv) {\
-\ yyv = (YYSTYPE*) malloc(yymaxdepth * sizeof(YYSTYPE));\
-\ yys = (short*) malloc(yymaxdepth * sizeof(short));\
+\ yyv = (YYSTYPE*) safemalloc(yymaxdepth * sizeof(YYSTYPE));\
+\ yys = (short*) safemalloc(yymaxdepth * sizeof(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*sizeof(YYSTYPE));\
\ yys = (short*)realloc((char*)yys,\
\ yymaxdepth*sizeof(short));\
+\ if ( !yyv || !yys ) {\
+\ yyerror( "yacc stack overflow" );\
+\ return(1);\
+\ }\
\ yyps = yys + ts;\
\ yypv = yyv + tv;\
\ maxyyps = &yys[yymaxdepth];\
/yypv *= *&yyv\[ *-1 *\];/c\
\ if (!yyv) {\
-\ yyv = (YYSTYPE*) malloc(yymaxdepth * sizeof(YYSTYPE));\
-\ yys = (int*) malloc(yymaxdepth * sizeof(int));\
+\ yyv = (YYSTYPE*) safemalloc(yymaxdepth * sizeof(YYSTYPE));\
+\ yys = (int*) safemalloc(yymaxdepth * sizeof(int));\
\ maxyyps = &yys[yymaxdepth];\
\ }\
\ yyps = &yys[-1];\
######################################################
# Plan still unknown
- *) mv $input $output;
+ *) sed -e 's/Received token/ *** Received token/' $input >$output;
esac
rm -rf $tmp $input