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1 /* -*-C-*- Note some compilers choke on comments on `#line' lines. */
2 #line
3 /* Skeleton output parser for bison,
4 Copyright 1984, 1989, 1990, 2000, 2001 Free Software Foundation, Inc.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* As a special exception, when this file is copied by Bison into a
22 Bison output file, you may use that output file without restriction.
23 This special exception was added by the Free Software Foundation
24 in version 1.24 of Bison. */
25
26 /* This is the parser code that is written into each bison parser when
27 the %semantic_parser declaration is not specified in the grammar.
28 It was written by Richard Stallman by simplifying the hairy parser
29 used when %semantic_parser is specified. */
30
31 #ifndef YYSTACK_USE_ALLOCA
32 # ifdef alloca
33 # define YYSTACK_USE_ALLOCA 1
34 # else /* alloca not defined */
35 # ifdef __GNUC__
36 # define YYSTACK_USE_ALLOCA 1
37 # define alloca __builtin_alloca
38 # else /* not GNU C. */
39 # if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi) || (defined (__sun) && defined (__i386))
40 # define YYSTACK_USE_ALLOCA 1
41 # include <alloca.h>
42 # else /* not sparc */
43 /* We think this test detects Watcom and Microsoft C. */
44 /* This used to test MSDOS, but that is a bad idea since that
45 symbol is in the user namespace. */
46 # if (defined (_MSDOS) || defined (_MSDOS_)) && !defined (__TURBOC__)
47 # if 0
48 /* No need for malloc.h, which pollutes the namespace; instead,
49 just don't use alloca. */
50 # include <malloc.h>
51 # endif
52 # else /* not MSDOS, or __TURBOC__ */
53 # if defined(_AIX)
54 /* I don't know what this was needed for, but it pollutes the
55 namespace. So I turned it off. rms, 2 May 1997. */
56 /* #include <malloc.h> */
57 #pragma alloca
58 # define YYSTACK_USE_ALLOCA 1
59 # else /* not MSDOS, or __TURBOC__, or _AIX */
60 # if 0
61 /* haible@ilog.fr says this works for HPUX 9.05 and up, and on
62 HPUX 10. Eventually we can turn this on. */
63 # ifdef __hpux
64 # define YYSTACK_USE_ALLOCA 1
65 # define alloca __builtin_alloca
66 # endif /* __hpux */
67 # endif
68 # endif /* not _AIX */
69 # endif /* not MSDOS, or __TURBOC__ */
70 # endif /* not sparc */
71 # endif /* not GNU C */
72 # endif /* alloca not defined */
73 #endif /* YYSTACK_USE_ALLOCA not defined */
74
75 #ifndef YYSTACK_USE_ALLOCA
76 # define YYSTACK_USE_ALLOCA 0
77 #endif
78
79 /* Realloc WHAT from SIZE to YYSTACKSIZE elements of TYPE.
80 If WHAT was malloc'ed (not the original automatic ARRAY), free it. */
81 #if YYSTACK_USE_ALLOCA
82 # define YYSTACK_REALLOC(Type, What, Array) \
83 do { \
84 Type *old = What; \
85 What = (Type *) malloc (yystacksize * sizeof (Type)); \
86 __yy_memcpy ((char *) What, (char *) old, \
87 (size) * (unsigned int) sizeof (Type)); \
88 yyfree_stacks = 1; \
89 if (old != Array) \
90 free (old); \
91 } while (0)
92 #else
93 # define YYSTACK_REALLOC(Type, What, Array) \
94 do { \
95 Type *old = What; \
96 What = (Type *) alloca (yystacksize * sizeof (Type)); \
97 __yy_memcpy ((char *) What, (char *) old, \
98 (size) * (unsigned int) sizeof (Type)); \
99 } while (0)
100 #endif
101
102 #define yyerrok (yyerrstatus = 0)
103 #define yyclearin (yychar = YYEMPTY)
104 #define YYEMPTY -2
105 #define YYEOF 0
106 #define YYACCEPT goto yyacceptlab
107 #define YYABORT goto yyabortlab
108 #define YYERROR goto yyerrlab1
109 /* Like YYERROR except do call yyerror. This remains here temporarily
110 to ease the transition to the new meaning of YYERROR, for GCC.
111 Once GCC version 2 has supplanted version 1, this can go. */
112 #define YYFAIL goto yyerrlab
113 #define YYRECOVERING() (!!yyerrstatus)
114 #define YYBACKUP(Token, Value) \
115 do \
116 if (yychar == YYEMPTY && yylen == 1) \
117 { \
118 yychar = (Token); \
119 yylval = (Value); \
120 yychar1 = YYTRANSLATE (yychar); \
121 YYPOPSTACK; \
122 goto yybackup; \
123 } \
124 else \
125 { \
126 yyerror ("syntax error: cannot back up"); \
127 YYERROR; \
128 } \
129 while (0)
130
131 #define YYTERROR 1
132 #define YYERRCODE 256
133
134
135 /* YYLLOC_DEFAULT -- Compute the default location (before the actions
136 are run).
137
138 When YYLLOC_DEFAULT is run, CURRENT is set the location of the
139 first token. By default, to implement support for ranges, extend
140 its range to the last symbol. */
141
142 #ifndef YYLLOC_DEFAULT
143 # define YYLLOC_DEFAULT(Current, Rhs, N) \
144 Current.last_line = Rhs[N].last_line; \
145 Current.last_column = Rhs[N].last_column;
146 #endif
147
148
149 /* YYLEX -- calling `yylex' with the right arguments. */
150
151 #if YYPURE
152 # if YYLSP_NEEDED
153 # ifdef YYLEX_PARAM
154 # define YYLEX yylex (&yylval, &yylloc, YYLEX_PARAM)
155 # else
156 # define YYLEX yylex (&yylval, &yylloc)
157 # endif
158 # else /* !YYLSP_NEEDED */
159 # ifdef YYLEX_PARAM
160 # define YYLEX yylex (&yylval, YYLEX_PARAM)
161 # else
162 # define YYLEX yylex (&yylval)
163 # endif
164 # endif /* !YYLSP_NEEDED */
165 #else /* !YYPURE */
166 # define YYLEX yylex ()
167 #endif /* !YYPURE */
168
169
170 /* Enable debugging if requested. */
171 #if YYDEBUG
172 # define YYDPRINTF(Args) \
173 do { \
174 if (yydebug) \
175 fprintf Args; \
176 } while (0)
177 /* Nonzero means print parse trace. [The following comment makes no
178 sense to me. Could someone clarify it? --akim] Since this is
179 uninitialized, it does not stop multiple parsers from coexisting.
180 */
181 int yydebug;
182 #else /* !YYDEBUG */
183 # define YYDPRINTF(Args)
184 #endif /* !YYDEBUG */
185
186 /* YYINITDEPTH -- initial size of the parser's stacks. */
187 #ifndef YYINITDEPTH
188 # define YYINITDEPTH 200
189 #endif
190
191 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
192 if the built-in stack extension method is used). */
193 #if YYMAXDEPTH == 0
194 # undef YYMAXDEPTH
195 #endif
196
197 #ifndef YYMAXDEPTH
198 # define YYMAXDEPTH 10000
199 #endif
200 \f
201 /* Define __yy_memcpy. Note that the size argument
202 should be passed with type unsigned int, because that is what the non-GCC
203 definitions require. With GCC, __builtin_memcpy takes an arg
204 of type size_t, but it can handle unsigned int. */
205
206 #if __GNUC__ > 1 /* GNU C and GNU C++ define this. */
207 # define __yy_memcpy(To, From, Count) __builtin_memcpy (To, From, Count)
208 #else /* not GNU C or C++ */
209
210 /* This is the most reliable way to avoid incompatibilities
211 in available built-in functions on various systems. */
212 static void
213 # ifndef __cplusplus
214 __yy_memcpy (to, from, count)
215 char *to;
216 const char *from;
217 unsigned int count;
218 # else /* __cplusplus */
219 __yy_memcpy (char *to, const char *from, unsigned int count)
220 # endif
221 {
222 register const char *f = from;
223 register char *t = to;
224 register int i = count;
225
226 while (i-- > 0)
227 *t++ = *f++;
228 }
229
230 #endif
231 \f
232 #line
233
234 /* The user can define YYPARSE_PARAM as the name of an argument to be passed
235 into yyparse. The argument should have type void *.
236 It should actually point to an object.
237 Grammar actions can access the variable by casting it
238 to the proper pointer type. */
239
240 #ifdef YYPARSE_PARAM
241 # ifdef __cplusplus
242 # define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
243 # define YYPARSE_PARAM_DECL
244 # else /* !__cplusplus */
245 # define YYPARSE_PARAM_ARG YYPARSE_PARAM
246 # define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
247 # endif /* !__cplusplus */
248 #else /* !YYPARSE_PARAM */
249 # define YYPARSE_PARAM_ARG
250 # define YYPARSE_PARAM_DECL
251 #endif /* !YYPARSE_PARAM */
252
253 /* Prevent warning if -Wstrict-prototypes. */
254 #ifdef __GNUC__
255 # ifdef YYPARSE_PARAM
256 int yyparse (void *);
257 # else
258 int yyparse (void);
259 # endif
260 #endif
261
262 /* YY_DECL_VARIABLES -- depending whether we use a pure parser,
263 variables are global, or local to YYPARSE. */
264
265 #define _YY_DECL_VARIABLES \
266 /* The lookahead symbol. */ \
267 int yychar; \
268 \
269 /* The semantic value of the lookahead symbol. */ \
270 YYSTYPE yylval; \
271 \
272 /* Number of parse errors so far. */ \
273 int yynerrs;
274
275 #if YYLSP_NEEDED
276 # define YY_DECL_VARIABLES \
277 _YY_DECL_VARIABLES \
278 \
279 /* Location data for the lookahead symbol. */ \
280 YYLTYPE yylloc;
281 #else
282 # define YY_DECL_VARIABLES \
283 _YY_DECL_VARIABLES
284 #endif
285
286
287 /* If nonreentrant, generate the variables here. */
288
289 #if !YYPURE
290 YY_DECL_VARIABLES
291 #endif /* !YYPURE */
292
293 int
294 yyparse (YYPARSE_PARAM_ARG)
295 YYPARSE_PARAM_DECL
296 {
297 /* If reentrant, generate the variables here. */
298 #if YYPURE
299 YY_DECL_VARIABLES
300 #endif /* !YYPURE */
301
302 register int yystate;
303 register int yyn;
304 /* Number of tokens to shift before error messages enabled. */
305 int yyerrstatus;
306 /* Lookahead token as an internal (translated) token number. */
307 int yychar1 = 0;
308
309 /* Three stacks and their tools:
310 `yyss': related to states,
311 `yyvs': related to semantic values,
312 `yyls': related to locations.
313
314 Refer to the stacks thru separate pointers, to allow yyoverflow
315 to reallocate them elsewhere. */
316
317 /* The state stack. */
318 short yyssa[YYINITDEPTH];
319 short *yyss = yyssa;
320 register short *yyssp;
321
322 /* The semantic value stack. */
323 YYSTYPE yyvsa[YYINITDEPTH];
324 YYSTYPE *yyvs = yyvsa;
325 register YYSTYPE *yyvsp;
326
327 #if YYLSP_NEEDED
328 /* The location stack. */
329 YYLTYPE yylsa[YYINITDEPTH];
330 YYLTYPE *yyls = yylsa;
331 YYLTYPE *yylsp;
332 #endif
333
334 #if YYLSP_NEEDED
335 # define YYPOPSTACK (yyvsp--, yyssp--, yylsp--)
336 #else
337 # define YYPOPSTACK (yyvsp--, yyssp--)
338 #endif
339
340 int yystacksize = YYINITDEPTH;
341 int yyfree_stacks = 0;
342
343
344 /* The variables used to return semantic value and location from the
345 action routines. */
346 YYSTYPE yyval;
347 # if YYLSP_NEEDED
348 YYLTYPE yyloc;
349 # endif
350
351 /* When reducing, the number of symbols on the RHS of the reduced
352 rule. */
353 int yylen;
354
355 YYDPRINTF ((stderr, "Starting parse\n"));
356
357 yystate = 0;
358 yyerrstatus = 0;
359 yynerrs = 0;
360 yychar = YYEMPTY; /* Cause a token to be read. */
361
362 /* Initialize stack pointers.
363 Waste one element of value and location stack
364 so that they stay on the same level as the state stack.
365 The wasted elements are never initialized. */
366
367 yyssp = yyss;
368 yyvsp = yyvs;
369 #if YYLSP_NEEDED
370 yylsp = yyls;
371 #endif
372 goto yysetstate;
373
374 /*------------------------------------------------------------.
375 | yynewstate -- Push a new state, which is found in yystate. |
376 `------------------------------------------------------------*/
377 yynewstate:
378 /* In all cases, when you get here, the value and location stacks
379 have just been pushed. so pushing a state here evens the stacks.
380 */
381 yyssp++;
382
383 yysetstate:
384 *yyssp = yystate;
385
386 if (yyssp >= yyss + yystacksize - 1)
387 {
388 /* Get the current used size of the three stacks, in elements. */
389 int size = yyssp - yyss + 1;
390
391 #ifdef yyoverflow
392 {
393 /* Give user a chance to reallocate the stack. Use copies of
394 these so that the &'s don't force the real ones into
395 memory. */
396 YYSTYPE *yyvs1 = yyvs;
397 short *yyss1 = yyss;
398
399 /* Each stack pointer address is followed by the size of the
400 data in use in that stack, in bytes. */
401 # if YYLSP_NEEDED
402 YYLTYPE *yyls1 = yyls;
403 /* This used to be a conditional around just the two extra args,
404 but that might be undefined if yyoverflow is a macro. */
405 yyoverflow ("parser stack overflow",
406 &yyss1, size * sizeof (*yyssp),
407 &yyvs1, size * sizeof (*yyvsp),
408 &yyls1, size * sizeof (*yylsp),
409 &yystacksize);
410 yyls = yyls1;
411 # else
412 yyoverflow ("parser stack overflow",
413 &yyss1, size * sizeof (*yyssp),
414 &yyvs1, size * sizeof (*yyvsp),
415 &yystacksize);
416 # endif
417 yyss = yyss1;
418 yyvs = yyvs1;
419 }
420 #else /* no yyoverflow */
421 /* Extend the stack our own way. */
422 if (yystacksize >= YYMAXDEPTH)
423 {
424 yyerror ("parser stack overflow");
425 if (yyfree_stacks)
426 {
427 free (yyss);
428 free (yyvs);
429 # if YYLSP_NEEDED
430 free (yyls);
431 # endif
432 }
433 return 2;
434 }
435 yystacksize *= 2;
436 if (yystacksize > YYMAXDEPTH)
437 yystacksize = YYMAXDEPTH;
438
439 YYSTACK_REALLOC (short, yyss, yyssa);
440 YYSTACK_REALLOC (YYSTYPE, yyvs, yyvsa);
441 # if YYLSP_NEEDED
442 YYSTACK_REALLOC (YYLTYPE, yyls, yylsa);
443 # endif
444 #endif /* no yyoverflow */
445
446 yyssp = yyss + size - 1;
447 yyvsp = yyvs + size - 1;
448 #if YYLSP_NEEDED
449 yylsp = yyls + size - 1;
450 #endif
451
452 YYDPRINTF ((stderr, "Stack size increased to %d\n", yystacksize));
453
454 if (yyssp >= yyss + yystacksize - 1)
455 YYABORT;
456 }
457
458 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
459
460 goto yybackup;
461
462
463 /*-----------.
464 | yybackup. |
465 `-----------*/
466 yybackup:
467
468 /* Do appropriate processing given the current state. */
469 /* Read a lookahead token if we need one and don't already have one. */
470 /* yyresume: */
471
472 /* First try to decide what to do without reference to lookahead token. */
473
474 yyn = yypact[yystate];
475 if (yyn == YYFLAG)
476 goto yydefault;
477
478 /* Not known => get a lookahead token if don't already have one. */
479
480 /* yychar is either YYEMPTY or YYEOF
481 or a valid token in external form. */
482
483 if (yychar == YYEMPTY)
484 {
485 YYDPRINTF ((stderr, "Reading a token: "));
486 yychar = YYLEX;
487 }
488
489 /* Convert token to internal form (in yychar1) for indexing tables with */
490
491 if (yychar <= 0) /* This means end of input. */
492 {
493 yychar1 = 0;
494 yychar = YYEOF; /* Don't call YYLEX any more */
495
496 YYDPRINTF ((stderr, "Now at end of input.\n"));
497 }
498 else
499 {
500 yychar1 = YYTRANSLATE (yychar);
501
502 #if YYDEBUG
503 /* We have to keep this `#if YYDEBUG', since we use variables
504 which are defined only if `YYDEBUG' is set. */
505 if (yydebug)
506 {
507 fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
508 /* Give the individual parser a way to print the precise
509 meaning of a token, for further debugging info. */
510 # ifdef YYPRINT
511 YYPRINT (stderr, yychar, yylval);
512 # endif
513 fprintf (stderr, ")\n");
514 }
515 #endif
516 }
517
518 yyn += yychar1;
519 if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
520 goto yydefault;
521
522 yyn = yytable[yyn];
523
524 /* yyn is what to do for this token type in this state.
525 Negative => reduce, -yyn is rule number.
526 Positive => shift, yyn is new state.
527 New state is final state => don't bother to shift,
528 just return success.
529 0, or most negative number => error. */
530
531 if (yyn < 0)
532 {
533 if (yyn == YYFLAG)
534 goto yyerrlab;
535 yyn = -yyn;
536 goto yyreduce;
537 }
538 else if (yyn == 0)
539 goto yyerrlab;
540
541 if (yyn == YYFINAL)
542 YYACCEPT;
543
544 /* Shift the lookahead token. */
545 YYDPRINTF ((stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]));
546
547 /* Discard the token being shifted unless it is eof. */
548 if (yychar != YYEOF)
549 yychar = YYEMPTY;
550
551 *++yyvsp = yylval;
552 #if YYLSP_NEEDED
553 *++yylsp = yylloc;
554 #endif
555
556 /* Count tokens shifted since error; after three, turn off error
557 status. */
558 if (yyerrstatus)
559 yyerrstatus--;
560
561 yystate = yyn;
562 goto yynewstate;
563
564
565 /*-----------------------------------------------------------.
566 | yydefault -- do the default action for the current state. |
567 `-----------------------------------------------------------*/
568 yydefault:
569 yyn = yydefact[yystate];
570 if (yyn == 0)
571 goto yyerrlab;
572 goto yyreduce;
573
574
575 /*-----------------------------.
576 | yyreduce -- Do a reduction. |
577 `-----------------------------*/
578 yyreduce:
579 /* yyn is the number of a rule to reduce with. */
580 yylen = yyr2[yyn];
581
582 /* If YYLEN is nonzero, implement the default value of the action:
583 `$$ = $1'.
584
585 Otherwise, the following line sets YYVAL to the semantic value of
586 the lookahead token. This behavior is undocumented and Bison
587 users should not rely upon it. Assigning to YYVAL
588 unconditionally makes the parser a bit smaller, and it avoids a
589 GCC warning that YYVAL may be used uninitialized. */
590 yyval = yyvsp[1-yylen];
591
592 #if YYLSP_NEEDED
593 /* Similarly for the default location. Let the user run additional
594 commands if for instance locations are ranges. */
595 yyloc = yylsp[1-yylen];
596 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);
597 #endif
598
599 #if YYDEBUG
600 /* We have to keep this `#if YYDEBUG', since we use variables which
601 are defined only if `YYDEBUG' is set. */
602 if (yydebug)
603 {
604 int i;
605
606 fprintf (stderr, "Reducing via rule %d (line %d), ",
607 yyn, yyrline[yyn]);
608
609 /* Print the symbols being reduced, and their result. */
610 for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
611 fprintf (stderr, "%s ", yytname[yyrhs[i]]);
612 fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
613 }
614 #endif
615 %% actions /* The action file replaces this line. */
616 #line
617 \f
618 yyvsp -= yylen;
619 yyssp -= yylen;
620 #if YYLSP_NEEDED
621 yylsp -= yylen;
622 #endif
623
624 #if YYDEBUG
625 if (yydebug)
626 {
627 short *ssp1 = yyss - 1;
628 fprintf (stderr, "state stack now");
629 while (ssp1 != yyssp)
630 fprintf (stderr, " %d", *++ssp1);
631 fprintf (stderr, "\n");
632 }
633 #endif
634
635 *++yyvsp = yyval;
636 #if YYLSP_NEEDED
637 *++yylsp = yyloc;
638 #endif
639
640 /* Now `shift' the result of the reduction. Determine what state
641 that goes to, based on the state we popped back to and the rule
642 number reduced by. */
643
644 yyn = yyr1[yyn];
645
646 yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
647 if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
648 yystate = yytable[yystate];
649 else
650 yystate = yydefgoto[yyn - YYNTBASE];
651
652 goto yynewstate;
653
654
655 /*------------------------------------.
656 | yyerrlab -- here on detecting error |
657 `------------------------------------*/
658 yyerrlab:
659 /* If not already recovering from an error, report this error. */
660 if (!yyerrstatus)
661 {
662 ++yynerrs;
663
664 #ifdef YYERROR_VERBOSE
665 yyn = yypact[yystate];
666
667 if (yyn > YYFLAG && yyn < YYLAST)
668 {
669 int size = 0;
670 char *msg;
671 int x, count;
672
673 count = 0;
674 /* Start X at -yyn if nec to avoid negative indexes in yycheck. */
675 for (x = (yyn < 0 ? -yyn : 0);
676 x < (int) (sizeof (yytname) / sizeof (char *)); x++)
677 if (yycheck[x + yyn] == x)
678 size += strlen (yytname[x]) + 15, count++;
679 size += strlen ("parse error, unexpected `") + 1;
680 size += strlen (yytname[YYTRANSLATE (yychar)]);
681 msg = (char *) malloc (size);
682 if (msg != 0)
683 {
684 strcpy (msg, "parse error, unexpected `");
685 strcat (msg, yytname[YYTRANSLATE (yychar)]);
686 strcat (msg, "'");
687
688 if (count < 5)
689 {
690 count = 0;
691 for (x = (yyn < 0 ? -yyn : 0);
692 x < (int) (sizeof (yytname) / sizeof (char *)); x++)
693 if (yycheck[x + yyn] == x)
694 {
695 strcat (msg, count == 0 ? ", expecting `" : " or `");
696 strcat (msg, yytname[x]);
697 strcat (msg, "'");
698 count++;
699 }
700 }
701 yyerror (msg);
702 free (msg);
703 }
704 else
705 yyerror ("parse error; also virtual memory exceeded");
706 }
707 else
708 #endif /* YYERROR_VERBOSE */
709 yyerror ("parse error");
710 }
711 goto yyerrlab1;
712
713
714 /*--------------------------------------------------.
715 | yyerrlab1 -- error raised explicitly by an action |
716 `--------------------------------------------------*/
717 yyerrlab1:
718 if (yyerrstatus == 3)
719 {
720 /* If just tried and failed to reuse lookahead token after an
721 error, discard it. */
722
723 /* return failure if at end of input */
724 if (yychar == YYEOF)
725 YYABORT;
726 YYDPRINTF ((stderr, "Discarding token %d (%s).\n",
727 yychar, yytname[yychar1]));
728 yychar = YYEMPTY;
729 }
730
731 /* Else will try to reuse lookahead token after shifting the error
732 token. */
733
734 yyerrstatus = 3; /* Each real token shifted decrements this */
735
736 goto yyerrhandle;
737
738
739 /*-------------------------------------------------------------------.
740 | yyerrdefault -- current state does not do anything special for the |
741 | error token. |
742 `-------------------------------------------------------------------*/
743 yyerrdefault:
744 #if 0
745 /* This is wrong; only states that explicitly want error tokens
746 should shift them. */
747
748 /* If its default is to accept any token, ok. Otherwise pop it. */
749 yyn = yydefact[yystate];
750 if (yyn)
751 goto yydefault;
752 #endif
753
754
755 /*---------------------------------------------------------------.
756 | yyerrpop -- pop the current state because it cannot handle the |
757 | error token |
758 `---------------------------------------------------------------*/
759 yyerrpop:
760 if (yyssp == yyss)
761 YYABORT;
762 yyvsp--;
763 yystate = *--yyssp;
764 #if YYLSP_NEEDED
765 yylsp--;
766 #endif
767
768 #if YYDEBUG
769 if (yydebug)
770 {
771 short *ssp1 = yyss - 1;
772 fprintf (stderr, "Error: state stack now");
773 while (ssp1 != yyssp)
774 fprintf (stderr, " %d", *++ssp1);
775 fprintf (stderr, "\n");
776 }
777 #endif
778
779 /*--------------.
780 | yyerrhandle. |
781 `--------------*/
782 yyerrhandle:
783 yyn = yypact[yystate];
784 if (yyn == YYFLAG)
785 goto yyerrdefault;
786
787 yyn += YYTERROR;
788 if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
789 goto yyerrdefault;
790
791 yyn = yytable[yyn];
792 if (yyn < 0)
793 {
794 if (yyn == YYFLAG)
795 goto yyerrpop;
796 yyn = -yyn;
797 goto yyreduce;
798 }
799 else if (yyn == 0)
800 goto yyerrpop;
801
802 if (yyn == YYFINAL)
803 YYACCEPT;
804
805 YYDPRINTF ((stderr, "Shifting error token, "));
806
807 *++yyvsp = yylval;
808 #if YYLSP_NEEDED
809 *++yylsp = yylloc;
810 #endif
811
812 yystate = yyn;
813 goto yynewstate;
814
815
816 /*-------------------------------------.
817 | yyacceptlab -- YYACCEPT comes here. |
818 `-------------------------------------*/
819 yyacceptlab:
820 if (yyfree_stacks)
821 {
822 free (yyss);
823 free (yyvs);
824 #if YYLSP_NEEDED
825 free (yyls);
826 #endif
827 }
828 return 0;
829
830
831 /*-----------------------------------.
832 | yyabortlab -- YYABORT comes here. |
833 `-----------------------------------*/
834 yyabortlab:
835 if (yyfree_stacks)
836 {
837 free (yyss);
838 free (yyvs);
839 #if YYLSP_NEEDED
840 free (yyls);
841 #endif
842 }
843 return 1;
844 }