1 /* parse.y - parser for flex input */
2
3 %token CHAR NUMBER SECTEND SCDECL XSCDECL NAME PREVCCL EOF_OP
4 %token OPTION_OP OPT_OUTFILE OPT_PREFIX OPT_YYCLASS OPT_HEADER OPT_EXTRA_TYPE
5 %token OPT_TABLES
6
7 %token CCE_ALNUM CCE_ALPHA CCE_BLANK CCE_CNTRL CCE_DIGIT CCE_GRAPH
8 %token CCE_LOWER CCE_PRINT CCE_PUNCT CCE_SPACE CCE_UPPER CCE_XDIGIT
9
10 %token CCE_NEG_ALNUM CCE_NEG_ALPHA CCE_NEG_BLANK CCE_NEG_CNTRL CCE_NEG_DIGIT CCE_NEG_GRAPH
11 %token CCE_NEG_LOWER CCE_NEG_PRINT CCE_NEG_PUNCT CCE_NEG_SPACE CCE_NEG_UPPER CCE_NEG_XDIGIT
12
13 %left CCL_OP_DIFF CCL_OP_UNION
14
15 /*
16 *POSIX and AT&T lex place the
17 * precedence of the repeat operator, {}, below that of concatenation.
18 * Thus, ab{3} is ababab. Most other POSIX utilities use an Extended
19 * Regular Expression (ERE) precedence that has the repeat operator
20 * higher than concatenation. This causes ab{3} to yield abbb.
21 *
22 * In order to support the POSIX and AT&T precedence and the flex
23 * precedence we define two token sets for the begin and end tokens of
24 * the repeat operator, '{' and '}'. The lexical scanner chooses
25 * which tokens to return based on whether posix_compat or lex_compat
26 * are specified. Specifying either posix_compat or lex_compat will
27 * cause flex to parse scanner files as per the AT&T and
28 * POSIX-mandated behavior.
29 */
30
31 %token BEGIN_REPEAT_POSIX END_REPEAT_POSIX BEGIN_REPEAT_FLEX END_REPEAT_FLEX
32
33
34 %{
35 /* Copyright (c) 1990 The Regents of the University of California. */
36 /* All rights reserved. */
37
38 /* This code is derived from software contributed to Berkeley by */
39 /* Vern Paxson. */
40
41 /* The United States Government has rights in this work pursuant */
42 /* to contract no. DE-AC03-76SF00098 between the United States */
43 /* Department of Energy and the University of California. */
44
45 /* This file is part of flex. */
46
47 /* Redistribution and use in source and binary forms, with or without */
48 /* modification, are permitted provided that the following conditions */
49 /* are met: */
50
51 /* 1. Redistributions of source code must retain the above copyright */
52 /* notice, this list of conditions and the following disclaimer. */
53 /* 2. Redistributions in binary form must reproduce the above copyright */
54 /* notice, this list of conditions and the following disclaimer in the */
55 /* documentation and/or other materials provided with the distribution. */
56
57 /* Neither the name of the University nor the names of its contributors */
58 /* may be used to endorse or promote products derived from this software */
59 /* without specific prior written permission. */
60
61 /* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
62 /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
63 /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
64 /* PURPOSE. */
65
66 #include "flexdef.h"
67 #include "tables.h"
68
69 int pat, scnum, eps, headcnt, trailcnt, lastchar, i, rulelen;
70 int trlcontxt, xcluflg, currccl, cclsorted, varlength, variable_trail_rule;
71
72 int *scon_stk;
73 int scon_stk_ptr;
74
75 static int madeany = false; /* whether we've made the '.' character class */
76 static int ccldot, cclany;
77 int previous_continued_action; /* whether the previous rule's action was '|' */
78
79 #define format_warn3(fmt, a1, a2) \
80 do{ \
81 char fw3_msg[MAXLINE];\
82 snprintf( fw3_msg, MAXLINE,(fmt), (a1), (a2) );\
83 warn( fw3_msg );\
84 }while(0)
85
86 /* Expand a POSIX character class expression. */
87 #define CCL_EXPR(func) \
88 do{ \
89 int c; \
90 for ( c = 0; c < csize; ++c ) \
91 if ( isascii(c) && func(c) ) \
92 ccladd( currccl, c ); \
93 }while(0)
94
95 /* negated class */
96 #define CCL_NEG_EXPR(func) \
97 do{ \
98 int c; \
99 for ( c = 0; c < csize; ++c ) \
100 if ( !func(c) ) \
101 ccladd( currccl, c ); \
102 }while(0)
103
104 /* While POSIX defines isblank(), it's not ANSI C. */
105 #define IS_BLANK(c) ((c) == ' ' || (c) == '\t')
106
107 /* On some over-ambitious machines, such as DEC Alpha's, the default
108 * token type is "long" instead of "int"; this leads to problems with
109 * declaring yylval in flexdef.h. But so far, all the yacc's I've seen
110 * wrap their definitions of YYSTYPE with "#ifndef YYSTYPE"'s, so the
111 * following should ensure that the default token type is "int".
112 */
113 #define YYSTYPE int
114
115 %}
116
117 %%
118 goal : initlex sect1 sect1end sect2 initforrule
119 { /* add default rule */
120 int def_rule;
121
122 pat = cclinit();
123 cclnegate( pat );
124
125 def_rule = mkstate( -pat );
126
127 /* Remember the number of the default rule so we
128 * don't generate "can't match" warnings for it.
129 */
130 default_rule = num_rules;
131
132 finish_rule( def_rule, false, 0, 0, 0);
133
134 for ( i = 1; i <= lastsc; ++i )
135 scset[i] = mkbranch( scset[i], def_rule );
136
137 if ( spprdflt )
138 add_action(
139 "YY_FATAL_ERROR( \"flex scanner jammed\" )" );
140 else
141 add_action( "ECHO" );
142
143 add_action( ";\n\tYY_BREAK\n" );
144 }
145 ;
146
147 initlex :
148 { /* initialize for processing rules */
149
150 /* Create default DFA start condition. */
151 scinstal( "INITIAL", false );
152 }
153 ;
154
155 sect1 : sect1 startconddecl namelist1
156 | sect1 options
157 |
158 | error
159 { synerr( _("unknown error processing section 1") ); }
160 ;
161
162 sect1end : SECTEND
163 {
164 check_options();
165 scon_stk = allocate_integer_array( lastsc + 1 );
166 scon_stk_ptr = 0;
167 }
168 ;
169
170 startconddecl : SCDECL
171 { xcluflg = false; }
172
173 | XSCDECL
174 { xcluflg = true; }
175 ;
176
177 namelist1 : namelist1 NAME
178 { scinstal( nmstr, xcluflg ); }
179
180 | NAME
181 { scinstal( nmstr, xcluflg ); }
182
183 | error
184 { synerr( _("bad start condition list") ); }
185 ;
186
187 options : OPTION_OP optionlist
188 ;
189
190 optionlist : optionlist option
191 |
192 ;
193
194 option : OPT_OUTFILE '=' NAME
195 {
196 outfilename = copy_string( nmstr );
197 did_outfilename = 1;
198 }
199 | OPT_EXTRA_TYPE '=' NAME
200 { extra_type = copy_string( nmstr ); }
201 | OPT_PREFIX '=' NAME
202 { prefix = copy_string( nmstr ); }
203 | OPT_YYCLASS '=' NAME
204 { yyclass = copy_string( nmstr ); }
205 | OPT_HEADER '=' NAME
206 { headerfilename = copy_string( nmstr ); }
207 | OPT_TABLES '=' NAME
208 { tablesext = true; tablesfilename = copy_string( nmstr ); }
209 ;
210
211 sect2 : sect2 scon initforrule flexrule '\n'
212 { scon_stk_ptr = $2; }
213 | sect2 scon '{' sect2 '}'
214 { scon_stk_ptr = $2; }
215 |
216 ;
217
218 initforrule :
219 {
220 /* Initialize for a parse of one rule. */
221 trlcontxt = variable_trail_rule = varlength = false;
222 trailcnt = headcnt = rulelen = 0;
223 current_state_type = STATE_NORMAL;
224 previous_continued_action = continued_action;
225 in_rule = true;
226
227 new_rule();
228 }
229 ;
230
231 flexrule : '^' rule
232 {
233 pat = $2;
234 finish_rule( pat, variable_trail_rule,
235 headcnt, trailcnt , previous_continued_action);
236
237 if ( scon_stk_ptr > 0 )
238 {
239 for ( i = 1; i <= scon_stk_ptr; ++i )
240 scbol[scon_stk[i]] =
241 mkbranch( scbol[scon_stk[i]],
242 pat );
243 }
244
245 else
246 {
247 /* Add to all non-exclusive start conditions,
248 * including the default (0) start condition.
249 */
250
251 for ( i = 1; i <= lastsc; ++i )
252 if ( ! scxclu[i] )
253 scbol[i] = mkbranch( scbol[i],
254 pat );
255 }
256
257 if ( ! bol_needed )
258 {
259 bol_needed = true;
260
261 if ( performance_report > 1 )
262 pinpoint_message(
263 "'^' operator results in sub-optimal performance" );
264 }
265 }
266
267 | rule
268 {
269 pat = $1;
270 finish_rule( pat, variable_trail_rule,
271 headcnt, trailcnt , previous_continued_action);
272
273 if ( scon_stk_ptr > 0 )
274 {
275 for ( i = 1; i <= scon_stk_ptr; ++i )
276 scset[scon_stk[i]] =
277 mkbranch( scset[scon_stk[i]],
278 pat );
279 }
280
281 else
282 {
283 for ( i = 1; i <= lastsc; ++i )
284 if ( ! scxclu[i] )
285 scset[i] =
286 mkbranch( scset[i],
287 pat );
288 }
289 }
290
291 | EOF_OP
292 {
293 if ( scon_stk_ptr > 0 )
294 build_eof_action();
295
296 else
297 {
298 /* This EOF applies to all start conditions
299 * which don't already have EOF actions.
300 */
301 for ( i = 1; i <= lastsc; ++i )
302 if ( ! sceof[i] )
303 scon_stk[++scon_stk_ptr] = i;
304
305 if ( scon_stk_ptr == 0 )
306 warn(
307 "all start conditions already have <<EOF>> rules" );
308
309 else
310 build_eof_action();
311 }
312 }
313
314 | error
315 { synerr( _("unrecognized rule") ); }
316 ;
317
318 scon_stk_ptr :
319 { $$ = scon_stk_ptr; }
320 ;
321
322 scon : '<' scon_stk_ptr namelist2 '>'
323 { $$ = $2; }
324
325 | '<' '*' '>'
326 {
327 $$ = scon_stk_ptr;
328
329 for ( i = 1; i <= lastsc; ++i )
330 {
331 int j;
332
333 for ( j = 1; j <= scon_stk_ptr; ++j )
334 if ( scon_stk[j] == i )
335 break;
336
337 if ( j > scon_stk_ptr )
338 scon_stk[++scon_stk_ptr] = i;
339 }
340 }
341
342 |
343 { $$ = scon_stk_ptr; }
344 ;
345
346 namelist2 : namelist2 ',' sconname
347
348 | sconname
349
350 | error
351 { synerr( _("bad start condition list") ); }
352 ;
353
354 sconname : NAME
355 {
356 if ( (scnum = sclookup( nmstr )) == 0 )
357 format_pinpoint_message(
358 "undeclared start condition %s",
359 nmstr );
360 else
361 {
362 for ( i = 1; i <= scon_stk_ptr; ++i )
363 if ( scon_stk[i] == scnum )
364 {
365 format_warn(
366 "<%s> specified twice",
367 scname[scnum] );
368 break;
369 }
370
371 if ( i > scon_stk_ptr )
372 scon_stk[++scon_stk_ptr] = scnum;
373 }
374 }
375 ;
376
377 rule : re2 re
378 {
379 if ( transchar[lastst[$2]] != SYM_EPSILON )
380 /* Provide final transition \now/ so it
381 * will be marked as a trailing context
382 * state.
383 */
384 $2 = link_machines( $2,
385 mkstate( SYM_EPSILON ) );
386
387 mark_beginning_as_normal( $2 );
388 current_state_type = STATE_NORMAL;
389
390 if ( previous_continued_action )
391 {
392 /* We need to treat this as variable trailing
393 * context so that the backup does not happen
394 * in the action but before the action switch
395 * statement. If the backup happens in the
396 * action, then the rules "falling into" this
397 * one's action will *also* do the backup,
398 * erroneously.
399 */
400 if ( ! varlength || headcnt != 0 )
401 warn(
402 "trailing context made variable due to preceding '|' action" );
403
404 /* Mark as variable. */
405 varlength = true;
406 headcnt = 0;
407
408 }
409
410 if ( lex_compat || (varlength && headcnt == 0) )
411 { /* variable trailing context rule */
412 /* Mark the first part of the rule as the
413 * accepting "head" part of a trailing
414 * context rule.
415 *
416 * By the way, we didn't do this at the
417 * beginning of this production because back
418 * then current_state_type was set up for a
419 * trail rule, and add_accept() can create
420 * a new state ...
421 */
422 add_accept( $1,
423 num_rules | YY_TRAILING_HEAD_MASK );
424 variable_trail_rule = true;
425 }
426
427 else
428 trailcnt = rulelen;
429
430 $$ = link_machines( $1, $2 );
431 }
432
433 | re2 re '$'
434 { synerr( _("trailing context used twice") ); }
435
436 | re '$'
437 {
438 headcnt = 0;
439 trailcnt = 1;
440 rulelen = 1;
441 varlength = false;
442
443 current_state_type = STATE_TRAILING_CONTEXT;
444
445 if ( trlcontxt )
446 {
447 synerr( _("trailing context used twice") );
448 $$ = mkstate( SYM_EPSILON );
449 }
450
451 else if ( previous_continued_action )
452 {
453 /* See the comment in the rule for "re2 re"
454 * above.
455 */
456 warn(
457 "trailing context made variable due to preceding '|' action" );
458
459 varlength = true;
460 }
461
462 if ( lex_compat || varlength )
463 {
464 /* Again, see the comment in the rule for
465 * "re2 re" above.
466 */
467 add_accept( $1,
468 num_rules | YY_TRAILING_HEAD_MASK );
469 variable_trail_rule = true;
470 }
471
472 trlcontxt = true;
473
474 eps = mkstate( SYM_EPSILON );
475 $$ = link_machines( $1,
476 link_machines( eps, mkstate( '\n' ) ) );
477 }
478
479 | re
480 {
481 $$ = $1;
482
483 if ( trlcontxt )
484 {
485 if ( lex_compat || (varlength && headcnt == 0) )
486 /* Both head and trail are
487 * variable-length.
488 */
489 variable_trail_rule = true;
490 else
491 trailcnt = rulelen;
492 }
493 }
494 ;
495
496
497 re : re '|' series
498 {
499 varlength = true;
500 $$ = mkor( $1, $3 );
501 }
502
503 | series
504 { $$ = $1; }
505 ;
506
507
508 re2 : re '/'
509 {
510 /* This rule is written separately so the
511 * reduction will occur before the trailing
512 * series is parsed.
513 */
514
515 if ( trlcontxt )
516 synerr( _("trailing context used twice") );
517 else
518 trlcontxt = true;
519
520 if ( varlength )
521 /* We hope the trailing context is
522 * fixed-length.
523 */
524 varlength = false;
525 else
526 headcnt = rulelen;
527
528 rulelen = 0;
529
530 current_state_type = STATE_TRAILING_CONTEXT;
531 $$ = $1;
532 }
533 ;
534
535 series : series singleton
536 {
537 /* This is where concatenation of adjacent patterns
538 * gets done.
539 */
540 $$ = link_machines( $1, $2 );
541 }
542
543 | singleton
544 { $$ = $1; }
545
546 | series BEGIN_REPEAT_POSIX NUMBER ',' NUMBER END_REPEAT_POSIX
547 {
548 varlength = true;
549
550 if ( $3 > $5 || $3 < 0 )
551 {
552 synerr( _("bad iteration values") );
553 $$ = $1;
554 }
555 else
556 {
557 if ( $3 == 0 )
558 {
559 if ( $5 <= 0 )
560 {
561 synerr(
562 _("bad iteration values") );
563 $$ = $1;
564 }
565 else
566 $$ = mkopt(
567 mkrep( $1, 1, $5 ) );
568 }
569 else
570 $$ = mkrep( $1, $3, $5 );
571 }
572 }
573
574 | series BEGIN_REPEAT_POSIX NUMBER ',' END_REPEAT_POSIX
575 {
576 varlength = true;
577
578 if ( $3 <= 0 )
579 {
580 synerr( _("iteration value must be positive") );
581 $$ = $1;
582 }
583
584 else
585 $$ = mkrep( $1, $3, INFINITE_REPEAT );
586 }
587
588 | series BEGIN_REPEAT_POSIX NUMBER END_REPEAT_POSIX
589 {
590 /* The series could be something like "(foo)",
591 * in which case we have no idea what its length
592 * is, so we punt here.
593 */
594 varlength = true;
595
596 if ( $3 <= 0 )
597 {
598 synerr( _("iteration value must be positive")
599 );
600 $$ = $1;
601 }
602
603 else
604 $$ = link_machines( $1,
605 copysingl( $1, $3 - 1 ) );
606 }
607
608 ;
609
610 singleton : singleton '*'
611 {
612 varlength = true;
613
614 $$ = mkclos( $1 );
615 }
616
617 | singleton '+'
618 {
619 varlength = true;
620 $$ = mkposcl( $1 );
621 }
622
623 | singleton '?'
624 {
625 varlength = true;
626 $$ = mkopt( $1 );
627 }
628
629 | singleton BEGIN_REPEAT_FLEX NUMBER ',' NUMBER END_REPEAT_FLEX
630 {
631 varlength = true;
632
633 if ( $3 > $5 || $3 < 0 )
634 {
635 synerr( _("bad iteration values") );
636 $$ = $1;
637 }
638 else
639 {
640 if ( $3 == 0 )
641 {
642 if ( $5 <= 0 )
643 {
644 synerr(
645 _("bad iteration values") );
646 $$ = $1;
647 }
648 else
649 $$ = mkopt(
650 mkrep( $1, 1, $5 ) );
651 }
652 else
653 $$ = mkrep( $1, $3, $5 );
654 }
655 }
656
657 | singleton BEGIN_REPEAT_FLEX NUMBER ',' END_REPEAT_FLEX
658 {
659 varlength = true;
660
661 if ( $3 <= 0 )
662 {
663 synerr( _("iteration value must be positive") );
664 $$ = $1;
665 }
666
667 else
668 $$ = mkrep( $1, $3, INFINITE_REPEAT );
669 }
670
671 | singleton BEGIN_REPEAT_FLEX NUMBER END_REPEAT_FLEX
672 {
673 /* The singleton could be something like "(foo)",
674 * in which case we have no idea what its length
675 * is, so we punt here.
676 */
677 varlength = true;
678
679 if ( $3 <= 0 )
680 {
681 synerr( _("iteration value must be positive") );
682 $$ = $1;
683 }
684
685 else
686 $$ = link_machines( $1,
687 copysingl( $1, $3 - 1 ) );
688 }
689
690 | '.'
691 {
692 if ( ! madeany )
693 {
694 /* Create the '.' character class. */
695 ccldot = cclinit();
696 ccladd( ccldot, '\n' );
697 cclnegate( ccldot );
698
699 if ( useecs )
700 mkeccl( ccltbl + cclmap[ccldot],
701 ccllen[ccldot], nextecm,
702 ecgroup, csize, csize );
703
704 /* Create the (?s:'.') character class. */
705 cclany = cclinit();
706 cclnegate( cclany );
707
708 if ( useecs )
709 mkeccl( ccltbl + cclmap[cclany],
710 ccllen[cclany], nextecm,
711 ecgroup, csize, csize );
712
713 madeany = true;
714 }
715
716 ++rulelen;
717
718 if (sf_dot_all())
719 $$ = mkstate( -cclany );
720 else
721 $$ = mkstate( -ccldot );
722 }
723
724 | fullccl
725 {
726 /* Sort characters for fast searching.
727 */
728 qsort( ccltbl + cclmap[$1], ccllen[$1], sizeof (*ccltbl), cclcmp );
729
730 if ( useecs )
731 mkeccl( ccltbl + cclmap[$1], ccllen[$1],
732 nextecm, ecgroup, csize, csize );
733
734 ++rulelen;
735
736 if (ccl_has_nl[$1])
737 rule_has_nl[num_rules] = true;
738
739 $$ = mkstate( -$1 );
740 }
741
742 | PREVCCL
743 {
744 ++rulelen;
745
746 if (ccl_has_nl[$1])
747 rule_has_nl[num_rules] = true;
748
749 $$ = mkstate( -$1 );
750 }
751
752 | '"' string '"'
753 { $$ = $2; }
754
755 | '(' re ')'
756 { $$ = $2; }
757
758 | CHAR
759 {
760 ++rulelen;
761
762 if ($1 == nlch)
763 rule_has_nl[num_rules] = true;
764
765 if (sf_case_ins() && has_case($1))
766 /* create an alternation, as in (a|A) */
767 $$ = mkor (mkstate($1), mkstate(reverse_case($1)));
768 else
769 $$ = mkstate( $1 );
770 }
771 ;
772 fullccl:
773 fullccl CCL_OP_DIFF braceccl { $$ = ccl_set_diff ($1, $3); }
774 | fullccl CCL_OP_UNION braceccl { $$ = ccl_set_union ($1, $3); }
775 | braceccl
776 ;
777
778 braceccl:
779
780 '[' ccl ']' { $$ = $2; }
781
782 | '[' '^' ccl ']'
783 {
784 cclnegate( $3 );
785 $$ = $3;
786 }
787 ;
788
789 ccl : ccl CHAR '-' CHAR
790 {
791
792 if (sf_case_ins())
793 {
794
795 /* If one end of the range has case and the other
796 * does not, or the cases are different, then we're not
797 * sure what range the user is trying to express.
798 * Examples: [@-z] or [S-t]
799 */
800 if (has_case ($2) != has_case ($4)
801 || (has_case ($2) && (b_islower ($2) != b_islower ($4)))
802 || (has_case ($2) && (b_isupper ($2) != b_isupper ($4))))
803 format_warn3 (
804 _("the character range [%c-%c] is ambiguous in a case-insensitive scanner"),
805 $2, $4);
806
807 /* If the range spans uppercase characters but not
808 * lowercase (or vice-versa), then should we automatically
809 * include lowercase characters in the range?
810 * Example: [@-_] spans [a-z] but not [A-Z]
811 */
812 else if (!has_case ($2) && !has_case ($4) && !range_covers_case ($2, $4))
813 format_warn3 (
814 _("the character range [%c-%c] is ambiguous in a case-insensitive scanner"),
815 $2, $4);
816 }
817
818 if ( $2 > $4 )
819 synerr( _("negative range in character class") );
820
821 else
822 {
823 for ( i = $2; i <= $4; ++i )
824 ccladd( $1, i );
825
826 /* Keep track if this ccl is staying in
827 * alphabetical order.
828 */
829 cclsorted = cclsorted && ($2 > lastchar);
830 lastchar = $4;
831
832 /* Do it again for upper/lowercase */
833 if (sf_case_ins() && has_case($2) && has_case($4)){
834 $2 = reverse_case ($2);
835 $4 = reverse_case ($4);
836
837 for ( i = $2; i <= $4; ++i )
838 ccladd( $1, i );
839
840 cclsorted = cclsorted && ($2 > lastchar);
841 lastchar = $4;
842 }
843
844 }
845
846 $$ = $1;
847 }
848
849 | ccl CHAR
850 {
851 ccladd( $1, $2 );
852 cclsorted = cclsorted && ($2 > lastchar);
853 lastchar = $2;
854
855 /* Do it again for upper/lowercase */
856 if (sf_case_ins() && has_case($2)){
857 $2 = reverse_case ($2);
858 ccladd ($1, $2);
859
860 cclsorted = cclsorted && ($2 > lastchar);
861 lastchar = $2;
862 }
863
864 $$ = $1;
865 }
866
867 | ccl ccl_expr
868 {
869 /* Too hard to properly maintain cclsorted. */
870 cclsorted = false;
871 $$ = $1;
872 }
873
874 |
875 {
876 cclsorted = true;
877 lastchar = 0;
878 currccl = $$ = cclinit();
879 }
880 ;
881
882 ccl_expr:
883 CCE_ALNUM { CCL_EXPR(isalnum); }
884 | CCE_ALPHA { CCL_EXPR(isalpha); }
885 | CCE_BLANK { CCL_EXPR(IS_BLANK); }
886 | CCE_CNTRL { CCL_EXPR(iscntrl); }
887 | CCE_DIGIT { CCL_EXPR(isdigit); }
888 | CCE_GRAPH { CCL_EXPR(isgraph); }
889 | CCE_LOWER {
890 CCL_EXPR(islower);
891 if (sf_case_ins())
892 CCL_EXPR(isupper);
893 }
894 | CCE_PRINT { CCL_EXPR(isprint); }
895 | CCE_PUNCT { CCL_EXPR(ispunct); }
896 | CCE_SPACE { CCL_EXPR(isspace); }
897 | CCE_XDIGIT { CCL_EXPR(isxdigit); }
898 | CCE_UPPER {
899 CCL_EXPR(isupper);
900 if (sf_case_ins())
901 CCL_EXPR(islower);
902 }
903
904 | CCE_NEG_ALNUM { CCL_NEG_EXPR(isalnum); }
905 | CCE_NEG_ALPHA { CCL_NEG_EXPR(isalpha); }
906 | CCE_NEG_BLANK { CCL_NEG_EXPR(IS_BLANK); }
907 | CCE_NEG_CNTRL { CCL_NEG_EXPR(iscntrl); }
908 | CCE_NEG_DIGIT { CCL_NEG_EXPR(isdigit); }
909 | CCE_NEG_GRAPH { CCL_NEG_EXPR(isgraph); }
910 | CCE_NEG_PRINT { CCL_NEG_EXPR(isprint); }
911 | CCE_NEG_PUNCT { CCL_NEG_EXPR(ispunct); }
912 | CCE_NEG_SPACE { CCL_NEG_EXPR(isspace); }
913 | CCE_NEG_XDIGIT { CCL_NEG_EXPR(isxdigit); }
914 | CCE_NEG_LOWER {
915 if ( sf_case_ins() )
916 warn(_("[:^lower:] is ambiguous in case insensitive scanner"));
917 else
918 CCL_NEG_EXPR(islower);
919 }
920 | CCE_NEG_UPPER {
921 if ( sf_case_ins() )
922 warn(_("[:^upper:] ambiguous in case insensitive scanner"));
923 else
924 CCL_NEG_EXPR(isupper);
925 }
926 ;
927
928 string : string CHAR
929 {
930 if ( $2 == nlch )
931 rule_has_nl[num_rules] = true;
932
933 ++rulelen;
934
935 if (sf_case_ins() && has_case($2))
936 $$ = mkor (mkstate($2), mkstate(reverse_case($2)));
937 else
938 $$ = mkstate ($2);
939
940 $$ = link_machines( $1, $$);
941 }
942
943 |
944 { $$ = mkstate( SYM_EPSILON ); }
945 ;
946
947 %%
948
949
950 /* build_eof_action - build the "<<EOF>>" action for the active start
951 * conditions
952 */
953
954 void build_eof_action()
955 {
956 int i;
957 char action_text[MAXLINE];
958
959 for ( i = 1; i <= scon_stk_ptr; ++i )
960 {
961 if ( sceof[scon_stk[i]] )
962 format_pinpoint_message(
963 "multiple <<EOF>> rules for start condition %s",
964 scname[scon_stk[i]] );
965
966 else
967 {
968 sceof[scon_stk[i]] = true;
969
970 if (previous_continued_action /* && previous action was regular */)
971 add_action("YY_RULE_SETUP\n");
972
973 snprintf( action_text, sizeof(action_text), "case YY_STATE_EOF(%s):\n",
974 scname[scon_stk[i]] );
975 add_action( action_text );
976 }
977 }
978
979 line_directive_out( (FILE *) 0, 1 );
980
981 /* This isn't a normal rule after all - don't count it as
982 * such, so we don't have any holes in the rule numbering
983 * (which make generating "rule can never match" warnings
984 * more difficult.
985 */
986 --num_rules;
987 ++num_eof_rules;
988 }
989
990
991 /* format_synerr - write out formatted syntax error */
992
format_synerr(msg,arg)993 void format_synerr( msg, arg )
994 const char *msg, arg[];
995 {
996 char errmsg[MAXLINE];
997
998 (void) snprintf( errmsg, sizeof(errmsg), msg, arg );
999 synerr( errmsg );
1000 }
1001
1002
1003 /* synerr - report a syntax error */
1004
synerr(str)1005 void synerr( str )
1006 const char *str;
1007 {
1008 syntaxerror = true;
1009 pinpoint_message( str );
1010 }
1011
1012
1013 /* format_warn - write out formatted warning */
1014
format_warn(msg,arg)1015 void format_warn( msg, arg )
1016 const char *msg, arg[];
1017 {
1018 char warn_msg[MAXLINE];
1019
1020 snprintf( warn_msg, sizeof(warn_msg), msg, arg );
1021 warn( warn_msg );
1022 }
1023
1024
1025 /* warn - report a warning, unless -w was given */
1026
warn(str)1027 void warn( str )
1028 const char *str;
1029 {
1030 line_warning( str, linenum );
1031 }
1032
1033 /* format_pinpoint_message - write out a message formatted with one string,
1034 * pinpointing its location
1035 */
1036
format_pinpoint_message(msg,arg)1037 void format_pinpoint_message( msg, arg )
1038 const char *msg, arg[];
1039 {
1040 char errmsg[MAXLINE];
1041
1042 snprintf( errmsg, sizeof(errmsg), msg, arg );
1043 pinpoint_message( errmsg );
1044 }
1045
1046
1047 /* pinpoint_message - write out a message, pinpointing its location */
1048
pinpoint_message(str)1049 void pinpoint_message( str )
1050 const char *str;
1051 {
1052 line_pinpoint( str, linenum );
1053 }
1054
1055
1056 /* line_warning - report a warning at a given line, unless -w was given */
1057
line_warning(str,line)1058 void line_warning( str, line )
1059 const char *str;
1060 int line;
1061 {
1062 char warning[MAXLINE];
1063
1064 if ( ! nowarn )
1065 {
1066 snprintf( warning, sizeof(warning), "warning, %s", str );
1067 line_pinpoint( warning, line );
1068 }
1069 }
1070
1071
1072 /* line_pinpoint - write out a message, pinpointing it at the given line */
1073
line_pinpoint(str,line)1074 void line_pinpoint( str, line )
1075 const char *str;
1076 int line;
1077 {
1078 fprintf( stderr, "%s:%d: %s\n", infilename, line, str );
1079 }
1080
1081
1082 /* yyerror - eat up an error message from the parser;
1083 * currently, messages are ignore
1084 */
1085
yyerror(msg)1086 void yyerror( msg )
1087 const char *msg;
1088 {
1089 }
1090