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