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.
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.
10 # Currently, only byacc version 1.8 is fully supported.
12 # Hacks to make it work with Interactive's SysVr3 Version 2.2
13 # doughera@lafvax.lafayette.edu (Andy Dougherty) 3/23/91
15 # Additional information to make the BSD section work with SunOS 4.0.2
16 # tdinger@East.Sun.COM (Tom Dinger) 4/15/1991
22 if grep 'yaccpar 1.8 (Berkeley)' $input >/dev/null 2>&1; then
24 if test -f perly_c.diff; then
25 patch -F3 $output <perly_c.diff
29 elif grep 'yaccpar 1.9 (Berkeley)' $input >/dev/null 2>&1; then
30 if test -f perly.c.dif9; then
31 patch -F3 $output <perly.c.dif9
35 echo "Diffs from byacc-1.9 are not available."
36 echo "If you wish to proceed anyway, do"
37 echo "cp $input $output"
38 echo "cp y.tab.h perly.h"
39 echo "and re-run make. Otherwise, I will use the old perly.c"
41 # Exit with error status to stop make.
49 echo "Warning: the yacc you have used is not directly supported by perl."
50 echo "The perly.fixer script will attempt to make some changes to the generated"
51 echo "file. The changes may be incomplete and that might lead to problems later"
52 echo "(especially with complex scripts). You may need to apply the changes"
53 echo "embedded in perl.fixer (and/or perly_c.dif*) by hand."
56 # Below, we check for various characteristic yaccpar outputs.
58 # Test for BSD 4.3 version.
59 # Also tests for the SunOS 4.0.2 version
60 egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];
61 short[ ]*yys\[ *YYMAXDEPTH *\] *;
62 yyps *= *&yys\[ *-1 *\];
63 yypv *= *&yyv\[ *-1 *\];
64 if *\( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
67 if test "$1" = "5"; then
71 if test "$plan" = "unknown"; then
72 # Test for ISC 2.2 version (probably generic SysVr3).
73 egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];
74 int[ ]*yys\[ *YYMAXDEPTH *\] *;
75 yyps *= *&yys\[ *-1 *\];
76 yypv *= *&yyv\[ *-1 *\];
77 if *\( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
80 if test "$1" = "5"; then
88 ##################################################################
89 # The SunOS 4.0.2 version has the comparison fixed already.
90 # Also added are out of memory checks (makes porting the generated
91 # code easier) For most systems, it can't hurt. -- TD
93 echo "Attempting to path perly.c to allow dynamic yacc stack allocation"
94 echo "Assuming bsd4.3 yaccpar"
96 /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\
97 int yymaxdepth = YYMAXDEPTH;\
98 YYSTYPE *yyv; /* where the values are stored */\
102 /short[ ]*yys\[ *YYMAXDEPTH *\] *;/d
104 /yyps *= *&yys\[ *-1 *\];/d
106 /yypv *= *&yyv\[ *-1 *\];/c\
108 \ New(73, yyv, yymaxdepth, YYSTYPE);\
109 \ New(73, yys, yymaxdepth, short);\
110 \ if ( !yyv || !yys ) {\
111 \ yyerror( "out of memory" );\
114 \ maxyyps = &yys[yymaxdepth];\
120 /if *( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *)/c\
121 \ if( ++yyps >= maxyyps ) {\
122 \ int tv = yypv - yyv;\
123 \ int ts = yyps - yys;\
126 \ Renew(yyv, yymaxdepth, YYSTYPE);\
127 \ Renew(yys, yymaxdepth, short);\
128 \ if ( !yyv || !yys ) {\
129 \ yyerror( "yacc stack overflow" );\
134 \ maxyyps = &yys[yymaxdepth];\
137 /yacc stack overflow.*}/d
138 /yacc stack overflow/,/}/d
140 if sed -f $tmp <$input >$output
141 then echo "The edit seems to have been applied okay."
142 else echo "The edit seems to have failed!"
146 #######################################################
147 "isc") # Interactive Systems 2.2 version
148 echo "Attempting to path perly.c to allow dynamic yacc stack allocation"
149 echo "Assuming Interactive SysVr3 2.2 yaccpar"
150 # Easier to simply put whole script here than to modify the
151 # bsd script with sed.
152 # Main changes: yaccpar sometimes uses yy_ps and yy_pv
153 # which are local register variables.
154 # if(++yyps > YYMAXDEPTH) had opening brace on next line.
155 # I've kept that brace in along with a call to yyerror if
156 # realloc fails. (Actually, I just don't know how to do
157 # multi-line matches in sed.)
159 /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\
160 int yymaxdepth = YYMAXDEPTH;\
161 YYSTYPE *yyv; /* where the values are stored */\
165 /int[ ]*yys\[ *YYMAXDEPTH *\] *;/d
167 /yyps *= *&yys\[ *-1 *\];/d
169 /yypv *= *&yyv\[ *-1 *\];/c\
171 \ New(73, yyv, yymaxdepth, YYSTYPE);\
172 \ New(73, yys, yymaxdepth, int);\
173 \ maxyyps = &yys[yymaxdepth];\
178 /if *( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *)/c\
179 \ if( ++yy_ps >= maxyyps ) {\
180 \ int tv = yy_pv - yyv;\
181 \ int ts = yy_ps - yys;\
184 \ Renew(yyv, yymaxdepth, YYSTYPE);\
185 \ Renew(yys, yymaxdepth, int);\
186 \ yy_ps = yyps = yys + ts;\
187 \ yy_pv = yypv = yyv + tv;\
188 \ maxyyps = &yys[yymaxdepth];\
190 \ if (yyv == NULL || yys == NULL)
192 if sed -f $tmp < $input > $output
193 then echo "The edit seems to have been applied okay."
194 else echo "The edit seems to have failed!"
198 ######################################################
201 echo "Unable to patch perly.c to allow dynamic yacc stack allocation (plan=$plan)"
202 # just do minimal change to write $output from $input
203 sed -e 's/Received token/ *** Received token/' $input >$output