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
18 # Also edit some practices gcc -Wall finds questionable.
28 inputh=`echo $input|sed 's:\.c$:.h:'`
29 if grep '^#ifdef PERL_CORE' $inputh; then
32 echo "#ifdef PERL_CORE" > $tmp
33 sed -e 's:^typedef union {:#endif /* PERL_CORE */\
35 typedef union {:' $inputh >> $tmp
39 if grep 'yaccpar 1.8 (Berkeley)' $input >/dev/null 2>&1; then
41 # Don't expect the diff to do everything -- do some by hand
42 if test -f perly_c.diff; then
43 $gnupatch -F3 $output <perly_c.diff
44 sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \
45 -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \
46 -e '/\[\] *= *[{]/s/^/static /' \
47 -e '/^static static/s/^static //' \
48 -e '/^#define.WORD/,/^#define.ARROW/d' \
49 -e '/^int.yydebug/,/^#define.yystacksize/d' \
50 -e 's/^yyerrlab:$//' \
51 -e 's/^ goto yyerrlab;//' \
52 -e 's/^yynewerror:$//' \
53 -e 's/^ goto yynewerror;//' \
54 -e 's|^static char yysccsid\(.*\)|/* static char yysccsid\1 */|' \
55 < $output > $tmp && mv -f $tmp $output || exit 1
57 echo "If you need to debug perly.c, you need to fix up the #line"
58 echo "directives yourself."
61 elif grep 'yaccpar 1.9 (Berkeley)' $input >/dev/null 2>&1; then
62 if test -f perly.c.dif9; then
63 $gnupatch -F3 $output <perly.c.dif9
64 sed -e '/^[ ]*printf("yydebug:/s/printf(/PerlIO_printf(Perl_debug_log, /' \
65 -e '/^#line /s/"y[.]tab[.]c"/"perly.c"/' \
66 -e '/\[\] *= *[{]/s/^/static /' \
67 -e '/^static static/s/^static //' \
68 -e '/^#define.WORD/,/^#define.ARROW/d' \
69 -e '/^int.yydebug/,/^#define.yystacksize/d' \
70 -e 's/^yyerrlab:$//' \
71 -e 's/^ goto yyerrlab;//' \
72 -e 's/^yynewerror:$//' \
73 -e 's/^ goto yynewerror;//' \
74 -e 's|^static char yysccsid\(.*\)|/* static char yysccsid\1 */|' \
75 < $output > $tmp && mv -f $tmp $output || exit 1
77 echo "If you need to debug perly.c, you need to fix up the #line"
78 echo "directives yourself."
81 echo "Diffs from byacc-1.9 are not available."
82 echo "If you wish to proceed anyway, do"
83 echo "cp $input $output"
84 echo "cp y.tab.h perly.h"
85 echo "and re-run make. Otherwise, I will use the old perly.c"
87 # Exit with error status to stop make.
95 echo "Warning: the yacc you have used is not directly supported by perl."
96 echo "The perly.fixer script will attempt to make some changes to the generated"
97 echo "file. The changes may be incomplete and that might lead to problems later"
98 echo "(especially with complex scripts). You may need to apply the changes"
99 echo "embedded in perl.fixer (and/or perly_c.dif*) by hand."
102 # Below, we check for various characteristic yaccpar outputs.
104 # Test for BSD 4.3 version.
105 # Also tests for the SunOS 4.0.2 version
106 egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];
107 short[ ]*yys\[ *YYMAXDEPTH *\] *;
108 yyps *= *&yys\[ *-1 *\];
109 yypv *= *&yyv\[ *-1 *\];
110 if *\( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
113 if test "$1" = "5"; then
117 if test "$plan" = "unknown"; then
118 # Test for ISC 2.2 version (probably generic SysVr3).
119 egrep 'YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];
120 int[ ]*yys\[ *YYMAXDEPTH *\] *;
121 yyps *= *&yys\[ *-1 *\];
122 yypv *= *&yyv\[ *-1 *\];
123 if *\( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *\)' $input >$tmp 2>/dev/null
126 if test "$1" = "5"; then
134 ##################################################################
135 # The SunOS 4.0.2 version has the comparison fixed already.
136 # Also added are out of memory checks (makes porting the generated
137 # code easier) For most systems, it can't hurt. -- TD
139 echo "Attempting to patch perly.c to allow dynamic yacc stack allocation"
140 echo "Assuming bsd4.3 yaccpar"
142 /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\
143 int yymaxdepth = YYMAXDEPTH;\
144 YYSTYPE *yyv; /* where the values are stored */\
148 /short[ ]*yys\[ *YYMAXDEPTH *\] *;/d
150 /yyps *= *&yys\[ *-1 *\];/d
152 /yypv *= *&yyv\[ *-1 *\];/c\
154 \ New(73, yyv, yymaxdepth, YYSTYPE);\
155 \ New(73, yys, yymaxdepth, short);\
156 \ if ( !yyv || !yys ) {\
157 \ yyerror( "out of memory" );\
160 \ maxyyps = &yys[yymaxdepth];\
166 /if *( *\+\+yyps *>=* *&yys\[ *YYMAXDEPTH *\] *)/c\
167 \ if( ++yyps >= maxyyps ) {\
168 \ int tv = yypv - yyv;\
169 \ int ts = yyps - yys;\
172 \ Renew(yyv, yymaxdepth, YYSTYPE);\
173 \ Renew(yys, yymaxdepth, short);\
174 \ if ( !yyv || !yys ) {\
175 \ yyerror( "yacc stack overflow" );\
180 \ maxyyps = &yys[yymaxdepth];\
183 /yacc stack overflow.*}/d
184 /yacc stack overflow/,/}/d
186 if sed -f $tmp <$input >$output
187 then echo "The edit seems to have been applied okay."
188 else echo "The edit seems to have failed!"
192 #######################################################
193 "isc") # Interactive Systems 2.2 version
194 echo "Attempting to patch perly.c to allow dynamic yacc stack allocation"
195 echo "Assuming Interactive SysVr3 2.2 yaccpar"
196 # Easier to simply put whole script here than to modify the
197 # bsd script with sed.
198 # Main changes: yaccpar sometimes uses yy_ps and yy_pv
199 # which are local register variables.
200 # if(++yyps > YYMAXDEPTH) had opening brace on next line.
201 # I've kept that brace in along with a call to yyerror if
202 # realloc fails. (Actually, I just don't know how to do
203 # multi-line matches in sed.)
205 /YYSTYPE[ ]*yyv\[ *YYMAXDEPTH *\];/c\
206 int yymaxdepth = YYMAXDEPTH;\
207 YYSTYPE *yyv; /* where the values are stored */\
211 /int[ ]*yys\[ *YYMAXDEPTH *\] *;/d
213 /yyps *= *&yys\[ *-1 *\];/d
215 /yypv *= *&yyv\[ *-1 *\];/c\
217 \ New(73, yyv, yymaxdepth, YYSTYPE);\
218 \ New(73, yys, yymaxdepth, int);\
219 \ maxyyps = &yys[yymaxdepth];\
224 /if *( *\+\+yy_ps *>= *&yys\[ *YYMAXDEPTH *\] *)/c\
225 \ if( ++yy_ps >= maxyyps ) {\
226 \ int tv = yy_pv - yyv;\
227 \ int ts = yy_ps - yys;\
230 \ Renew(yyv, yymaxdepth, YYSTYPE);\
231 \ Renew(yys, yymaxdepth, int);\
232 \ yy_ps = yyps = yys + ts;\
233 \ yy_pv = yypv = yyv + tv;\
234 \ maxyyps = &yys[yymaxdepth];\
236 \ if (yyv == NULL || yys == NULL)
238 if sed -f $tmp < $input > $output
239 then echo "The edit seems to have been applied okay."
240 else echo "The edit seems to have failed!"
244 ######################################################
247 echo "Unable to patch perly.c to allow dynamic yacc stack allocation (plan=$plan)"
248 # just do minimal change to write $output from $input
249 sed -e 's/Received token/ *** Received token/' $input >$output