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373a8247 | 1 | /* YACC parser for Pascal expressions, for GDB. |
9b254dd1 | 2 | Copyright (C) 2000, 2006, 2007, 2008 Free Software Foundation, Inc. |
373a8247 PM |
3 | |
4 | This file is part of GDB. | |
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 of the License, or | |
9 | (at your option) 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 | |
197e01b6 EZ |
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
373a8247 PM |
20 | |
21 | /* This file is derived from c-exp.y */ | |
22 | ||
23 | /* Parse a Pascal expression from text in a string, | |
24 | and return the result as a struct expression pointer. | |
25 | That structure contains arithmetic operations in reverse polish, | |
26 | with constants represented by operations that are followed by special data. | |
27 | See expression.h for the details of the format. | |
28 | What is important here is that it can be built up sequentially | |
29 | during the process of parsing; the lower levels of the tree always | |
30 | come first in the result. | |
31 | ||
32 | Note that malloc's and realloc's in this file are transformed to | |
33 | xmalloc and xrealloc respectively by the same sed command in the | |
34 | makefile that remaps any other malloc/realloc inserted by the parser | |
35 | generator. Doing this with #defines and trying to control the interaction | |
36 | with include files (<malloc.h> and <stdlib.h> for example) just became | |
37 | too messy, particularly when such includes can be inserted at random | |
38 | times by the parser generator. */ | |
39 | ||
29f319b8 | 40 | /* Known bugs or limitations: |
373a8247 PM |
41 | - pascal string operations are not supported at all. |
42 | - there are some problems with boolean types. | |
43 | - Pascal type hexadecimal constants are not supported | |
44 | because they conflict with the internal variables format. | |
45 | Probably also lots of other problems, less well defined PM */ | |
46 | %{ | |
47 | ||
48 | #include "defs.h" | |
49 | #include "gdb_string.h" | |
50 | #include <ctype.h> | |
51 | #include "expression.h" | |
52 | #include "value.h" | |
53 | #include "parser-defs.h" | |
54 | #include "language.h" | |
55 | #include "p-lang.h" | |
56 | #include "bfd.h" /* Required by objfiles.h. */ | |
57 | #include "symfile.h" /* Required by objfiles.h. */ | |
58 | #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */ | |
fe898f56 | 59 | #include "block.h" |
373a8247 PM |
60 | |
61 | /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc), | |
62 | as well as gratuitiously global symbol names, so we can have multiple | |
63 | yacc generated parsers in gdb. Note that these are only the variables | |
64 | produced by yacc. If other parser generators (bison, byacc, etc) produce | |
65 | additional global names that conflict at link time, then those parser | |
66 | generators need to be fixed instead of adding those names to this list. */ | |
67 | ||
68 | #define yymaxdepth pascal_maxdepth | |
69 | #define yyparse pascal_parse | |
70 | #define yylex pascal_lex | |
71 | #define yyerror pascal_error | |
72 | #define yylval pascal_lval | |
73 | #define yychar pascal_char | |
74 | #define yydebug pascal_debug | |
75 | #define yypact pascal_pact | |
76 | #define yyr1 pascal_r1 | |
77 | #define yyr2 pascal_r2 | |
78 | #define yydef pascal_def | |
79 | #define yychk pascal_chk | |
80 | #define yypgo pascal_pgo | |
81 | #define yyact pascal_act | |
82 | #define yyexca pascal_exca | |
83 | #define yyerrflag pascal_errflag | |
84 | #define yynerrs pascal_nerrs | |
85 | #define yyps pascal_ps | |
86 | #define yypv pascal_pv | |
87 | #define yys pascal_s | |
88 | #define yy_yys pascal_yys | |
89 | #define yystate pascal_state | |
90 | #define yytmp pascal_tmp | |
91 | #define yyv pascal_v | |
92 | #define yy_yyv pascal_yyv | |
93 | #define yyval pascal_val | |
94 | #define yylloc pascal_lloc | |
95 | #define yyreds pascal_reds /* With YYDEBUG defined */ | |
96 | #define yytoks pascal_toks /* With YYDEBUG defined */ | |
06891d83 JT |
97 | #define yyname pascal_name /* With YYDEBUG defined */ |
98 | #define yyrule pascal_rule /* With YYDEBUG defined */ | |
373a8247 PM |
99 | #define yylhs pascal_yylhs |
100 | #define yylen pascal_yylen | |
101 | #define yydefred pascal_yydefred | |
102 | #define yydgoto pascal_yydgoto | |
103 | #define yysindex pascal_yysindex | |
104 | #define yyrindex pascal_yyrindex | |
105 | #define yygindex pascal_yygindex | |
106 | #define yytable pascal_yytable | |
107 | #define yycheck pascal_yycheck | |
108 | ||
109 | #ifndef YYDEBUG | |
f461f5cf | 110 | #define YYDEBUG 1 /* Default to yydebug support */ |
373a8247 PM |
111 | #endif |
112 | ||
f461f5cf PM |
113 | #define YYFPRINTF parser_fprintf |
114 | ||
373a8247 PM |
115 | int yyparse (void); |
116 | ||
117 | static int yylex (void); | |
118 | ||
119 | void | |
120 | yyerror (char *); | |
121 | ||
122 | static char * uptok (char *, int); | |
123 | %} | |
124 | ||
125 | /* Although the yacc "value" of an expression is not used, | |
126 | since the result is stored in the structure being created, | |
127 | other node types do have values. */ | |
128 | ||
129 | %union | |
130 | { | |
131 | LONGEST lval; | |
132 | struct { | |
133 | LONGEST val; | |
134 | struct type *type; | |
135 | } typed_val_int; | |
136 | struct { | |
137 | DOUBLEST dval; | |
138 | struct type *type; | |
139 | } typed_val_float; | |
140 | struct symbol *sym; | |
141 | struct type *tval; | |
142 | struct stoken sval; | |
143 | struct ttype tsym; | |
144 | struct symtoken ssym; | |
145 | int voidval; | |
146 | struct block *bval; | |
147 | enum exp_opcode opcode; | |
148 | struct internalvar *ivar; | |
149 | ||
150 | struct type **tvec; | |
151 | int *ivec; | |
152 | } | |
153 | ||
154 | %{ | |
155 | /* YYSTYPE gets defined by %union */ | |
156 | static int | |
157 | parse_number (char *, int, int, YYSTYPE *); | |
9819c6c8 PM |
158 | |
159 | static struct type *current_type; | |
4ae0885a | 160 | static int leftdiv_is_integer; |
b9362cc7 AC |
161 | static void push_current_type (void); |
162 | static void pop_current_type (void); | |
9819c6c8 | 163 | static int search_field; |
373a8247 PM |
164 | %} |
165 | ||
9819c6c8 | 166 | %type <voidval> exp exp1 type_exp start normal_start variable qualified_name |
373a8247 PM |
167 | %type <tval> type typebase |
168 | /* %type <bval> block */ | |
169 | ||
170 | /* Fancy type parsing. */ | |
171 | %type <tval> ptype | |
172 | ||
173 | %token <typed_val_int> INT | |
174 | %token <typed_val_float> FLOAT | |
175 | ||
176 | /* Both NAME and TYPENAME tokens represent symbols in the input, | |
177 | and both convey their data as strings. | |
178 | But a TYPENAME is a string that happens to be defined as a typedef | |
179 | or builtin type name (such as int or char) | |
180 | and a NAME is any other symbol. | |
181 | Contexts where this distinction is not important can use the | |
182 | nonterminal "name", which matches either NAME or TYPENAME. */ | |
183 | ||
9819c6c8 PM |
184 | %token <sval> STRING |
185 | %token <sval> FIELDNAME | |
373a8247 PM |
186 | %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */ |
187 | %token <tsym> TYPENAME | |
188 | %type <sval> name | |
189 | %type <ssym> name_not_typename | |
190 | ||
191 | /* A NAME_OR_INT is a symbol which is not known in the symbol table, | |
192 | but which would parse as a valid number in the current input radix. | |
193 | E.g. "c" when input_radix==16. Depending on the parse, it will be | |
194 | turned into a name or into a number. */ | |
195 | ||
196 | %token <ssym> NAME_OR_INT | |
197 | ||
198 | %token STRUCT CLASS SIZEOF COLONCOLON | |
199 | %token ERROR | |
200 | ||
201 | /* Special type cases, put in to allow the parser to distinguish different | |
202 | legal basetypes. */ | |
203 | ||
204 | %token <voidval> VARIABLE | |
205 | ||
206 | ||
207 | /* Object pascal */ | |
208 | %token THIS | |
2692ddb3 | 209 | %token <lval> TRUEKEYWORD FALSEKEYWORD |
373a8247 PM |
210 | |
211 | %left ',' | |
212 | %left ABOVE_COMMA | |
213 | %right ASSIGN | |
214 | %left NOT | |
215 | %left OR | |
216 | %left XOR | |
217 | %left ANDAND | |
218 | %left '=' NOTEQUAL | |
219 | %left '<' '>' LEQ GEQ | |
220 | %left LSH RSH DIV MOD | |
221 | %left '@' | |
222 | %left '+' '-' | |
223 | %left '*' '/' | |
224 | %right UNARY INCREMENT DECREMENT | |
225 | %right ARROW '.' '[' '(' | |
29f319b8 | 226 | %left '^' |
373a8247 PM |
227 | %token <ssym> BLOCKNAME |
228 | %type <bval> block | |
229 | %left COLONCOLON | |
230 | ||
231 | \f | |
232 | %% | |
233 | ||
9819c6c8 PM |
234 | start : { current_type = NULL; |
235 | search_field = 0; | |
4ae0885a | 236 | leftdiv_is_integer = 0; |
9819c6c8 | 237 | } |
ef944135 TR |
238 | normal_start {} |
239 | ; | |
9819c6c8 PM |
240 | |
241 | normal_start : | |
242 | exp1 | |
373a8247 PM |
243 | | type_exp |
244 | ; | |
245 | ||
246 | type_exp: type | |
247 | { write_exp_elt_opcode(OP_TYPE); | |
248 | write_exp_elt_type($1); | |
9819c6c8 PM |
249 | write_exp_elt_opcode(OP_TYPE); |
250 | current_type = $1; } ; | |
373a8247 PM |
251 | |
252 | /* Expressions, including the comma operator. */ | |
253 | exp1 : exp | |
254 | | exp1 ',' exp | |
255 | { write_exp_elt_opcode (BINOP_COMMA); } | |
256 | ; | |
257 | ||
258 | /* Expressions, not including the comma operator. */ | |
259 | exp : exp '^' %prec UNARY | |
9819c6c8 PM |
260 | { write_exp_elt_opcode (UNOP_IND); |
261 | if (current_type) | |
262 | current_type = TYPE_TARGET_TYPE (current_type); } | |
ef944135 | 263 | ; |
373a8247 PM |
264 | |
265 | exp : '@' exp %prec UNARY | |
9819c6c8 PM |
266 | { write_exp_elt_opcode (UNOP_ADDR); |
267 | if (current_type) | |
268 | current_type = TYPE_POINTER_TYPE (current_type); } | |
ef944135 | 269 | ; |
373a8247 PM |
270 | |
271 | exp : '-' exp %prec UNARY | |
272 | { write_exp_elt_opcode (UNOP_NEG); } | |
273 | ; | |
274 | ||
275 | exp : NOT exp %prec UNARY | |
276 | { write_exp_elt_opcode (UNOP_LOGICAL_NOT); } | |
277 | ; | |
278 | ||
279 | exp : INCREMENT '(' exp ')' %prec UNARY | |
280 | { write_exp_elt_opcode (UNOP_PREINCREMENT); } | |
281 | ; | |
282 | ||
283 | exp : DECREMENT '(' exp ')' %prec UNARY | |
284 | { write_exp_elt_opcode (UNOP_PREDECREMENT); } | |
285 | ; | |
286 | ||
9819c6c8 PM |
287 | exp : exp '.' { search_field = 1; } |
288 | FIELDNAME | |
289 | /* name */ | |
373a8247 | 290 | { write_exp_elt_opcode (STRUCTOP_STRUCT); |
9819c6c8 PM |
291 | write_exp_string ($4); |
292 | write_exp_elt_opcode (STRUCTOP_STRUCT); | |
293 | search_field = 0; | |
294 | if (current_type) | |
295 | { while (TYPE_CODE (current_type) == TYPE_CODE_PTR) | |
296 | current_type = TYPE_TARGET_TYPE (current_type); | |
297 | current_type = lookup_struct_elt_type ( | |
020cc13c | 298 | current_type, $4.ptr, 0); }; |
9819c6c8 PM |
299 | } ; |
300 | exp : exp '[' | |
301 | /* We need to save the current_type value */ | |
302 | { char *arrayname; | |
303 | int arrayfieldindex; | |
304 | arrayfieldindex = is_pascal_string_type ( | |
305 | current_type, NULL, NULL, | |
306 | NULL, NULL, &arrayname); | |
307 | if (arrayfieldindex) | |
308 | { | |
309 | struct stoken stringsval; | |
310 | stringsval.ptr = alloca (strlen (arrayname) + 1); | |
311 | stringsval.length = strlen (arrayname); | |
312 | strcpy (stringsval.ptr, arrayname); | |
313 | current_type = TYPE_FIELD_TYPE (current_type, | |
314 | arrayfieldindex - 1); | |
315 | write_exp_elt_opcode (STRUCTOP_STRUCT); | |
316 | write_exp_string (stringsval); | |
317 | write_exp_elt_opcode (STRUCTOP_STRUCT); | |
318 | } | |
319 | push_current_type (); } | |
320 | exp1 ']' | |
321 | { pop_current_type (); | |
322 | write_exp_elt_opcode (BINOP_SUBSCRIPT); | |
323 | if (current_type) | |
324 | current_type = TYPE_TARGET_TYPE (current_type); } | |
ef944135 | 325 | ; |
373a8247 PM |
326 | |
327 | exp : exp '(' | |
328 | /* This is to save the value of arglist_len | |
329 | being accumulated by an outer function call. */ | |
9819c6c8 PM |
330 | { push_current_type (); |
331 | start_arglist (); } | |
373a8247 PM |
332 | arglist ')' %prec ARROW |
333 | { write_exp_elt_opcode (OP_FUNCALL); | |
334 | write_exp_elt_longcst ((LONGEST) end_arglist ()); | |
9819c6c8 | 335 | write_exp_elt_opcode (OP_FUNCALL); |
4ae0885a PM |
336 | pop_current_type (); |
337 | if (current_type) | |
338 | current_type = TYPE_TARGET_TYPE (current_type); | |
339 | } | |
373a8247 PM |
340 | ; |
341 | ||
342 | arglist : | |
343 | | exp | |
344 | { arglist_len = 1; } | |
345 | | arglist ',' exp %prec ABOVE_COMMA | |
346 | { arglist_len++; } | |
347 | ; | |
348 | ||
349 | exp : type '(' exp ')' %prec UNARY | |
fd0e9d45 PM |
350 | { if (current_type) |
351 | { | |
352 | /* Allow automatic dereference of classes. */ | |
353 | if ((TYPE_CODE (current_type) == TYPE_CODE_PTR) | |
354 | && (TYPE_CODE (TYPE_TARGET_TYPE (current_type)) == TYPE_CODE_CLASS) | |
355 | && (TYPE_CODE ($1) == TYPE_CODE_CLASS)) | |
356 | write_exp_elt_opcode (UNOP_IND); | |
357 | } | |
358 | write_exp_elt_opcode (UNOP_CAST); | |
373a8247 | 359 | write_exp_elt_type ($1); |
9819c6c8 PM |
360 | write_exp_elt_opcode (UNOP_CAST); |
361 | current_type = $1; } | |
373a8247 PM |
362 | ; |
363 | ||
364 | exp : '(' exp1 ')' | |
365 | { } | |
366 | ; | |
367 | ||
368 | /* Binary operators in order of decreasing precedence. */ | |
369 | ||
370 | exp : exp '*' exp | |
371 | { write_exp_elt_opcode (BINOP_MUL); } | |
372 | ; | |
373 | ||
4ae0885a PM |
374 | exp : exp '/' { |
375 | if (current_type && is_integral_type (current_type)) | |
376 | leftdiv_is_integer = 1; | |
377 | } | |
378 | exp | |
379 | { | |
380 | if (leftdiv_is_integer && current_type | |
381 | && is_integral_type (current_type)) | |
382 | { | |
383 | write_exp_elt_opcode (UNOP_CAST); | |
384 | write_exp_elt_type (builtin_type_long_double); | |
385 | current_type = builtin_type_long_double; | |
386 | write_exp_elt_opcode (UNOP_CAST); | |
387 | leftdiv_is_integer = 0; | |
388 | } | |
389 | ||
390 | write_exp_elt_opcode (BINOP_DIV); | |
391 | } | |
373a8247 PM |
392 | ; |
393 | ||
394 | exp : exp DIV exp | |
395 | { write_exp_elt_opcode (BINOP_INTDIV); } | |
396 | ; | |
397 | ||
398 | exp : exp MOD exp | |
399 | { write_exp_elt_opcode (BINOP_REM); } | |
400 | ; | |
401 | ||
402 | exp : exp '+' exp | |
403 | { write_exp_elt_opcode (BINOP_ADD); } | |
404 | ; | |
405 | ||
406 | exp : exp '-' exp | |
407 | { write_exp_elt_opcode (BINOP_SUB); } | |
408 | ; | |
409 | ||
410 | exp : exp LSH exp | |
411 | { write_exp_elt_opcode (BINOP_LSH); } | |
412 | ; | |
413 | ||
414 | exp : exp RSH exp | |
415 | { write_exp_elt_opcode (BINOP_RSH); } | |
416 | ; | |
417 | ||
418 | exp : exp '=' exp | |
4ae0885a PM |
419 | { write_exp_elt_opcode (BINOP_EQUAL); |
420 | current_type = builtin_type_bool; | |
421 | } | |
373a8247 PM |
422 | ; |
423 | ||
424 | exp : exp NOTEQUAL exp | |
4ae0885a PM |
425 | { write_exp_elt_opcode (BINOP_NOTEQUAL); |
426 | current_type = builtin_type_bool; | |
427 | } | |
373a8247 PM |
428 | ; |
429 | ||
430 | exp : exp LEQ exp | |
4ae0885a PM |
431 | { write_exp_elt_opcode (BINOP_LEQ); |
432 | current_type = builtin_type_bool; | |
433 | } | |
373a8247 PM |
434 | ; |
435 | ||
436 | exp : exp GEQ exp | |
4ae0885a PM |
437 | { write_exp_elt_opcode (BINOP_GEQ); |
438 | current_type = builtin_type_bool; | |
439 | } | |
373a8247 PM |
440 | ; |
441 | ||
442 | exp : exp '<' exp | |
4ae0885a PM |
443 | { write_exp_elt_opcode (BINOP_LESS); |
444 | current_type = builtin_type_bool; | |
445 | } | |
373a8247 PM |
446 | ; |
447 | ||
448 | exp : exp '>' exp | |
4ae0885a PM |
449 | { write_exp_elt_opcode (BINOP_GTR); |
450 | current_type = builtin_type_bool; | |
451 | } | |
373a8247 PM |
452 | ; |
453 | ||
454 | exp : exp ANDAND exp | |
455 | { write_exp_elt_opcode (BINOP_BITWISE_AND); } | |
456 | ; | |
457 | ||
458 | exp : exp XOR exp | |
459 | { write_exp_elt_opcode (BINOP_BITWISE_XOR); } | |
460 | ; | |
461 | ||
462 | exp : exp OR exp | |
463 | { write_exp_elt_opcode (BINOP_BITWISE_IOR); } | |
464 | ; | |
465 | ||
466 | exp : exp ASSIGN exp | |
467 | { write_exp_elt_opcode (BINOP_ASSIGN); } | |
468 | ; | |
469 | ||
2692ddb3 | 470 | exp : TRUEKEYWORD |
373a8247 PM |
471 | { write_exp_elt_opcode (OP_BOOL); |
472 | write_exp_elt_longcst ((LONGEST) $1); | |
4ae0885a | 473 | current_type = builtin_type_bool; |
373a8247 PM |
474 | write_exp_elt_opcode (OP_BOOL); } |
475 | ; | |
476 | ||
2692ddb3 | 477 | exp : FALSEKEYWORD |
373a8247 PM |
478 | { write_exp_elt_opcode (OP_BOOL); |
479 | write_exp_elt_longcst ((LONGEST) $1); | |
4ae0885a | 480 | current_type = builtin_type_bool; |
373a8247 PM |
481 | write_exp_elt_opcode (OP_BOOL); } |
482 | ; | |
483 | ||
484 | exp : INT | |
485 | { write_exp_elt_opcode (OP_LONG); | |
486 | write_exp_elt_type ($1.type); | |
4ae0885a | 487 | current_type = $1.type; |
373a8247 PM |
488 | write_exp_elt_longcst ((LONGEST)($1.val)); |
489 | write_exp_elt_opcode (OP_LONG); } | |
490 | ; | |
491 | ||
492 | exp : NAME_OR_INT | |
493 | { YYSTYPE val; | |
494 | parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val); | |
495 | write_exp_elt_opcode (OP_LONG); | |
496 | write_exp_elt_type (val.typed_val_int.type); | |
4ae0885a | 497 | current_type = val.typed_val_int.type; |
373a8247 PM |
498 | write_exp_elt_longcst ((LONGEST)val.typed_val_int.val); |
499 | write_exp_elt_opcode (OP_LONG); | |
500 | } | |
501 | ; | |
502 | ||
503 | ||
504 | exp : FLOAT | |
505 | { write_exp_elt_opcode (OP_DOUBLE); | |
506 | write_exp_elt_type ($1.type); | |
4ae0885a | 507 | current_type = $1.type; |
373a8247 PM |
508 | write_exp_elt_dblcst ($1.dval); |
509 | write_exp_elt_opcode (OP_DOUBLE); } | |
510 | ; | |
511 | ||
512 | exp : variable | |
513 | ; | |
514 | ||
515 | exp : VARIABLE | |
516 | /* Already written by write_dollar_variable. */ | |
517 | ; | |
518 | ||
519 | exp : SIZEOF '(' type ')' %prec UNARY | |
520 | { write_exp_elt_opcode (OP_LONG); | |
521 | write_exp_elt_type (builtin_type_int); | |
522 | CHECK_TYPEDEF ($3); | |
523 | write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3)); | |
524 | write_exp_elt_opcode (OP_LONG); } | |
525 | ; | |
526 | ||
527 | exp : STRING | |
528 | { /* C strings are converted into array constants with | |
529 | an explicit null byte added at the end. Thus | |
530 | the array upper bound is the string length. | |
531 | There is no such thing in C as a completely empty | |
532 | string. */ | |
533 | char *sp = $1.ptr; int count = $1.length; | |
534 | while (count-- > 0) | |
535 | { | |
536 | write_exp_elt_opcode (OP_LONG); | |
537 | write_exp_elt_type (builtin_type_char); | |
538 | write_exp_elt_longcst ((LONGEST)(*sp++)); | |
539 | write_exp_elt_opcode (OP_LONG); | |
540 | } | |
541 | write_exp_elt_opcode (OP_LONG); | |
542 | write_exp_elt_type (builtin_type_char); | |
543 | write_exp_elt_longcst ((LONGEST)'\0'); | |
544 | write_exp_elt_opcode (OP_LONG); | |
545 | write_exp_elt_opcode (OP_ARRAY); | |
546 | write_exp_elt_longcst ((LONGEST) 0); | |
547 | write_exp_elt_longcst ((LONGEST) ($1.length)); | |
548 | write_exp_elt_opcode (OP_ARRAY); } | |
549 | ; | |
550 | ||
551 | /* Object pascal */ | |
552 | exp : THIS | |
fd0e9d45 PM |
553 | { |
554 | struct value * this_val; | |
555 | struct type * this_type; | |
556 | write_exp_elt_opcode (OP_THIS); | |
557 | write_exp_elt_opcode (OP_THIS); | |
558 | /* we need type of this */ | |
559 | this_val = value_of_this (0); | |
560 | if (this_val) | |
04624583 | 561 | this_type = value_type (this_val); |
fd0e9d45 PM |
562 | else |
563 | this_type = NULL; | |
564 | if (this_type) | |
565 | { | |
566 | if (TYPE_CODE (this_type) == TYPE_CODE_PTR) | |
567 | { | |
568 | this_type = TYPE_TARGET_TYPE (this_type); | |
569 | write_exp_elt_opcode (UNOP_IND); | |
570 | } | |
571 | } | |
572 | ||
573 | current_type = this_type; | |
574 | } | |
373a8247 PM |
575 | ; |
576 | ||
577 | /* end of object pascal. */ | |
578 | ||
579 | block : BLOCKNAME | |
580 | { | |
581 | if ($1.sym != 0) | |
582 | $$ = SYMBOL_BLOCK_VALUE ($1.sym); | |
583 | else | |
584 | { | |
585 | struct symtab *tem = | |
586 | lookup_symtab (copy_name ($1.stoken)); | |
587 | if (tem) | |
588 | $$ = BLOCKVECTOR_BLOCK (BLOCKVECTOR (tem), STATIC_BLOCK); | |
589 | else | |
590 | error ("No file or function \"%s\".", | |
591 | copy_name ($1.stoken)); | |
592 | } | |
593 | } | |
594 | ; | |
595 | ||
596 | block : block COLONCOLON name | |
597 | { struct symbol *tem | |
598 | = lookup_symbol (copy_name ($3), $1, | |
176620f1 | 599 | VAR_DOMAIN, (int *) NULL, |
373a8247 PM |
600 | (struct symtab **) NULL); |
601 | if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK) | |
602 | error ("No function \"%s\" in specified context.", | |
603 | copy_name ($3)); | |
604 | $$ = SYMBOL_BLOCK_VALUE (tem); } | |
605 | ; | |
606 | ||
607 | variable: block COLONCOLON name | |
608 | { struct symbol *sym; | |
609 | sym = lookup_symbol (copy_name ($3), $1, | |
176620f1 | 610 | VAR_DOMAIN, (int *) NULL, |
373a8247 PM |
611 | (struct symtab **) NULL); |
612 | if (sym == 0) | |
613 | error ("No symbol \"%s\" in specified context.", | |
614 | copy_name ($3)); | |
615 | ||
616 | write_exp_elt_opcode (OP_VAR_VALUE); | |
617 | /* block_found is set by lookup_symbol. */ | |
618 | write_exp_elt_block (block_found); | |
619 | write_exp_elt_sym (sym); | |
620 | write_exp_elt_opcode (OP_VAR_VALUE); } | |
621 | ; | |
622 | ||
623 | qualified_name: typebase COLONCOLON name | |
624 | { | |
625 | struct type *type = $1; | |
626 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT | |
627 | && TYPE_CODE (type) != TYPE_CODE_UNION) | |
628 | error ("`%s' is not defined as an aggregate type.", | |
629 | TYPE_NAME (type)); | |
630 | ||
631 | write_exp_elt_opcode (OP_SCOPE); | |
632 | write_exp_elt_type (type); | |
633 | write_exp_string ($3); | |
634 | write_exp_elt_opcode (OP_SCOPE); | |
635 | } | |
636 | ; | |
637 | ||
638 | variable: qualified_name | |
639 | | COLONCOLON name | |
640 | { | |
641 | char *name = copy_name ($2); | |
642 | struct symbol *sym; | |
643 | struct minimal_symbol *msymbol; | |
644 | ||
645 | sym = | |
646 | lookup_symbol (name, (const struct block *) NULL, | |
176620f1 | 647 | VAR_DOMAIN, (int *) NULL, |
373a8247 PM |
648 | (struct symtab **) NULL); |
649 | if (sym) | |
650 | { | |
651 | write_exp_elt_opcode (OP_VAR_VALUE); | |
652 | write_exp_elt_block (NULL); | |
653 | write_exp_elt_sym (sym); | |
654 | write_exp_elt_opcode (OP_VAR_VALUE); | |
655 | break; | |
656 | } | |
657 | ||
658 | msymbol = lookup_minimal_symbol (name, NULL, NULL); | |
659 | if (msymbol != NULL) | |
660 | { | |
661 | write_exp_msymbol (msymbol, | |
662 | lookup_function_type (builtin_type_int), | |
663 | builtin_type_int); | |
664 | } | |
665 | else | |
666 | if (!have_full_symbols () && !have_partial_symbols ()) | |
667 | error ("No symbol table is loaded. Use the \"file\" command."); | |
668 | else | |
669 | error ("No symbol \"%s\" in current context.", name); | |
670 | } | |
671 | ; | |
672 | ||
673 | variable: name_not_typename | |
674 | { struct symbol *sym = $1.sym; | |
675 | ||
676 | if (sym) | |
677 | { | |
678 | if (symbol_read_needs_frame (sym)) | |
679 | { | |
0b058123 PM |
680 | if (innermost_block == 0 |
681 | || contained_in (block_found, | |
682 | innermost_block)) | |
373a8247 PM |
683 | innermost_block = block_found; |
684 | } | |
685 | ||
686 | write_exp_elt_opcode (OP_VAR_VALUE); | |
687 | /* We want to use the selected frame, not | |
688 | another more inner frame which happens to | |
689 | be in the same block. */ | |
690 | write_exp_elt_block (NULL); | |
691 | write_exp_elt_sym (sym); | |
692 | write_exp_elt_opcode (OP_VAR_VALUE); | |
9819c6c8 | 693 | current_type = sym->type; } |
373a8247 PM |
694 | else if ($1.is_a_field_of_this) |
695 | { | |
9819c6c8 PM |
696 | struct value * this_val; |
697 | struct type * this_type; | |
373a8247 PM |
698 | /* Object pascal: it hangs off of `this'. Must |
699 | not inadvertently convert from a method call | |
700 | to data ref. */ | |
0b058123 PM |
701 | if (innermost_block == 0 |
702 | || contained_in (block_found, | |
703 | innermost_block)) | |
373a8247 PM |
704 | innermost_block = block_found; |
705 | write_exp_elt_opcode (OP_THIS); | |
706 | write_exp_elt_opcode (OP_THIS); | |
707 | write_exp_elt_opcode (STRUCTOP_PTR); | |
708 | write_exp_string ($1.stoken); | |
709 | write_exp_elt_opcode (STRUCTOP_PTR); | |
9819c6c8 PM |
710 | /* we need type of this */ |
711 | this_val = value_of_this (0); | |
712 | if (this_val) | |
04624583 | 713 | this_type = value_type (this_val); |
9819c6c8 PM |
714 | else |
715 | this_type = NULL; | |
716 | if (this_type) | |
717 | current_type = lookup_struct_elt_type ( | |
718 | this_type, | |
020cc13c | 719 | copy_name ($1.stoken), 0); |
9819c6c8 PM |
720 | else |
721 | current_type = NULL; | |
373a8247 PM |
722 | } |
723 | else | |
724 | { | |
725 | struct minimal_symbol *msymbol; | |
710122da | 726 | char *arg = copy_name ($1.stoken); |
373a8247 PM |
727 | |
728 | msymbol = | |
729 | lookup_minimal_symbol (arg, NULL, NULL); | |
730 | if (msymbol != NULL) | |
731 | { | |
732 | write_exp_msymbol (msymbol, | |
733 | lookup_function_type (builtin_type_int), | |
734 | builtin_type_int); | |
735 | } | |
736 | else if (!have_full_symbols () && !have_partial_symbols ()) | |
737 | error ("No symbol table is loaded. Use the \"file\" command."); | |
738 | else | |
739 | error ("No symbol \"%s\" in current context.", | |
740 | copy_name ($1.stoken)); | |
741 | } | |
742 | } | |
743 | ; | |
744 | ||
745 | ||
746 | ptype : typebase | |
747 | ; | |
748 | ||
749 | /* We used to try to recognize more pointer to member types here, but | |
750 | that didn't work (shift/reduce conflicts meant that these rules never | |
751 | got executed). The problem is that | |
752 | int (foo::bar::baz::bizzle) | |
753 | is a function type but | |
754 | int (foo::bar::baz::bizzle::*) | |
755 | is a pointer to member type. Stroustrup loses again! */ | |
756 | ||
757 | type : ptype | |
373a8247 PM |
758 | ; |
759 | ||
760 | typebase /* Implements (approximately): (type-qualifier)* type-specifier */ | |
fd0e9d45 PM |
761 | : '^' typebase |
762 | { $$ = lookup_pointer_type ($2); } | |
763 | | TYPENAME | |
373a8247 PM |
764 | { $$ = $1.type; } |
765 | | STRUCT name | |
766 | { $$ = lookup_struct (copy_name ($2), | |
767 | expression_context_block); } | |
768 | | CLASS name | |
769 | { $$ = lookup_struct (copy_name ($2), | |
770 | expression_context_block); } | |
771 | /* "const" and "volatile" are curently ignored. A type qualifier | |
772 | after the type is handled in the ptype rule. I think these could | |
773 | be too. */ | |
774 | ; | |
775 | ||
776 | name : NAME { $$ = $1.stoken; } | |
777 | | BLOCKNAME { $$ = $1.stoken; } | |
778 | | TYPENAME { $$ = $1.stoken; } | |
779 | | NAME_OR_INT { $$ = $1.stoken; } | |
780 | ; | |
781 | ||
782 | name_not_typename : NAME | |
783 | | BLOCKNAME | |
784 | /* These would be useful if name_not_typename was useful, but it is just | |
785 | a fake for "variable", so these cause reduce/reduce conflicts because | |
786 | the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable, | |
787 | =exp) or just an exp. If name_not_typename was ever used in an lvalue | |
788 | context where only a name could occur, this might be useful. | |
789 | | NAME_OR_INT | |
790 | */ | |
791 | ; | |
792 | ||
793 | %% | |
794 | ||
795 | /* Take care of parsing a number (anything that starts with a digit). | |
796 | Set yylval and return the token type; update lexptr. | |
797 | LEN is the number of characters in it. */ | |
798 | ||
799 | /*** Needs some error checking for the float case ***/ | |
800 | ||
801 | static int | |
802 | parse_number (p, len, parsed_float, putithere) | |
710122da DC |
803 | char *p; |
804 | int len; | |
373a8247 PM |
805 | int parsed_float; |
806 | YYSTYPE *putithere; | |
807 | { | |
808 | /* FIXME: Shouldn't these be unsigned? We don't deal with negative values | |
809 | here, and we do kind of silly things like cast to unsigned. */ | |
710122da DC |
810 | LONGEST n = 0; |
811 | LONGEST prevn = 0; | |
373a8247 PM |
812 | ULONGEST un; |
813 | ||
710122da DC |
814 | int i = 0; |
815 | int c; | |
816 | int base = input_radix; | |
373a8247 PM |
817 | int unsigned_p = 0; |
818 | ||
819 | /* Number of "L" suffixes encountered. */ | |
820 | int long_p = 0; | |
821 | ||
822 | /* We have found a "L" or "U" suffix. */ | |
823 | int found_suffix = 0; | |
824 | ||
825 | ULONGEST high_bit; | |
826 | struct type *signed_type; | |
827 | struct type *unsigned_type; | |
828 | ||
829 | if (parsed_float) | |
830 | { | |
831 | /* It's a float since it contains a point or an exponent. */ | |
832 | char c; | |
833 | int num = 0; /* number of tokens scanned by scanf */ | |
834 | char saved_char = p[len]; | |
835 | ||
836 | p[len] = 0; /* null-terminate the token */ | |
689e4e2d | 837 | num = sscanf (p, "%" DOUBLEST_SCAN_FORMAT "%c", |
96c1eda2 | 838 | &putithere->typed_val_float.dval, &c); |
373a8247 PM |
839 | p[len] = saved_char; /* restore the input stream */ |
840 | if (num != 1) /* check scanf found ONLY a float ... */ | |
841 | return ERROR; | |
842 | /* See if it has `f' or `l' suffix (float or long double). */ | |
843 | ||
844 | c = tolower (p[len - 1]); | |
845 | ||
846 | if (c == 'f') | |
847 | putithere->typed_val_float.type = builtin_type_float; | |
848 | else if (c == 'l') | |
849 | putithere->typed_val_float.type = builtin_type_long_double; | |
850 | else if (isdigit (c) || c == '.') | |
851 | putithere->typed_val_float.type = builtin_type_double; | |
852 | else | |
853 | return ERROR; | |
854 | ||
855 | return FLOAT; | |
856 | } | |
857 | ||
858 | /* Handle base-switching prefixes 0x, 0t, 0d, 0 */ | |
859 | if (p[0] == '0') | |
860 | switch (p[1]) | |
861 | { | |
862 | case 'x': | |
863 | case 'X': | |
864 | if (len >= 3) | |
865 | { | |
866 | p += 2; | |
867 | base = 16; | |
868 | len -= 2; | |
869 | } | |
870 | break; | |
871 | ||
872 | case 't': | |
873 | case 'T': | |
874 | case 'd': | |
875 | case 'D': | |
876 | if (len >= 3) | |
877 | { | |
878 | p += 2; | |
879 | base = 10; | |
880 | len -= 2; | |
881 | } | |
882 | break; | |
883 | ||
884 | default: | |
885 | base = 8; | |
886 | break; | |
887 | } | |
888 | ||
889 | while (len-- > 0) | |
890 | { | |
891 | c = *p++; | |
892 | if (c >= 'A' && c <= 'Z') | |
893 | c += 'a' - 'A'; | |
894 | if (c != 'l' && c != 'u') | |
895 | n *= base; | |
896 | if (c >= '0' && c <= '9') | |
897 | { | |
898 | if (found_suffix) | |
899 | return ERROR; | |
900 | n += i = c - '0'; | |
901 | } | |
902 | else | |
903 | { | |
904 | if (base > 10 && c >= 'a' && c <= 'f') | |
905 | { | |
906 | if (found_suffix) | |
907 | return ERROR; | |
908 | n += i = c - 'a' + 10; | |
909 | } | |
910 | else if (c == 'l') | |
911 | { | |
912 | ++long_p; | |
913 | found_suffix = 1; | |
914 | } | |
915 | else if (c == 'u') | |
916 | { | |
917 | unsigned_p = 1; | |
918 | found_suffix = 1; | |
919 | } | |
920 | else | |
921 | return ERROR; /* Char not a digit */ | |
922 | } | |
923 | if (i >= base) | |
924 | return ERROR; /* Invalid digit in this base */ | |
925 | ||
926 | /* Portably test for overflow (only works for nonzero values, so make | |
927 | a second check for zero). FIXME: Can't we just make n and prevn | |
928 | unsigned and avoid this? */ | |
929 | if (c != 'l' && c != 'u' && (prevn >= n) && n != 0) | |
930 | unsigned_p = 1; /* Try something unsigned */ | |
931 | ||
932 | /* Portably test for unsigned overflow. | |
933 | FIXME: This check is wrong; for example it doesn't find overflow | |
934 | on 0x123456789 when LONGEST is 32 bits. */ | |
935 | if (c != 'l' && c != 'u' && n != 0) | |
936 | { | |
937 | if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n)) | |
938 | error ("Numeric constant too large."); | |
939 | } | |
940 | prevn = n; | |
941 | } | |
942 | ||
943 | /* An integer constant is an int, a long, or a long long. An L | |
944 | suffix forces it to be long; an LL suffix forces it to be long | |
945 | long. If not forced to a larger size, it gets the first type of | |
946 | the above that it fits in. To figure out whether it fits, we | |
947 | shift it right and see whether anything remains. Note that we | |
948 | can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one | |
949 | operation, because many compilers will warn about such a shift | |
9a76efb6 UW |
950 | (which always produces a zero result). Sometimes gdbarch_int_bit |
951 | or gdbarch_long_bit will be that big, sometimes not. To deal with | |
373a8247 PM |
952 | the case where it is we just always shift the value more than |
953 | once, with fewer bits each time. */ | |
954 | ||
955 | un = (ULONGEST)n >> 2; | |
956 | if (long_p == 0 | |
9a76efb6 | 957 | && (un >> (gdbarch_int_bit (current_gdbarch) - 2)) == 0) |
373a8247 | 958 | { |
9a76efb6 | 959 | high_bit = ((ULONGEST)1) << (gdbarch_int_bit (current_gdbarch) - 1); |
373a8247 PM |
960 | |
961 | /* A large decimal (not hex or octal) constant (between INT_MAX | |
962 | and UINT_MAX) is a long or unsigned long, according to ANSI, | |
963 | never an unsigned int, but this code treats it as unsigned | |
964 | int. This probably should be fixed. GCC gives a warning on | |
965 | such constants. */ | |
966 | ||
967 | unsigned_type = builtin_type_unsigned_int; | |
968 | signed_type = builtin_type_int; | |
969 | } | |
970 | else if (long_p <= 1 | |
9a76efb6 | 971 | && (un >> (gdbarch_long_bit (current_gdbarch) - 2)) == 0) |
373a8247 | 972 | { |
9a76efb6 | 973 | high_bit = ((ULONGEST)1) << (gdbarch_long_bit (current_gdbarch) - 1); |
373a8247 PM |
974 | unsigned_type = builtin_type_unsigned_long; |
975 | signed_type = builtin_type_long; | |
976 | } | |
977 | else | |
978 | { | |
7451d027 | 979 | int shift; |
9a76efb6 UW |
980 | if (sizeof (ULONGEST) * HOST_CHAR_BIT |
981 | < gdbarch_long_long_bit (current_gdbarch)) | |
373a8247 | 982 | /* A long long does not fit in a LONGEST. */ |
7451d027 AC |
983 | shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1); |
984 | else | |
9a76efb6 | 985 | shift = (gdbarch_long_long_bit (current_gdbarch) - 1); |
7451d027 | 986 | high_bit = (ULONGEST) 1 << shift; |
373a8247 PM |
987 | unsigned_type = builtin_type_unsigned_long_long; |
988 | signed_type = builtin_type_long_long; | |
989 | } | |
990 | ||
991 | putithere->typed_val_int.val = n; | |
992 | ||
993 | /* If the high bit of the worked out type is set then this number | |
994 | has to be unsigned. */ | |
995 | ||
996 | if (unsigned_p || (n & high_bit)) | |
997 | { | |
998 | putithere->typed_val_int.type = unsigned_type; | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | putithere->typed_val_int.type = signed_type; | |
1003 | } | |
1004 | ||
1005 | return INT; | |
1006 | } | |
1007 | ||
9819c6c8 PM |
1008 | |
1009 | struct type_push | |
1010 | { | |
1011 | struct type *stored; | |
1012 | struct type_push *next; | |
1013 | }; | |
1014 | ||
1015 | static struct type_push *tp_top = NULL; | |
1016 | ||
b9362cc7 AC |
1017 | static void |
1018 | push_current_type (void) | |
9819c6c8 PM |
1019 | { |
1020 | struct type_push *tpnew; | |
1021 | tpnew = (struct type_push *) malloc (sizeof (struct type_push)); | |
1022 | tpnew->next = tp_top; | |
1023 | tpnew->stored = current_type; | |
1024 | current_type = NULL; | |
1025 | tp_top = tpnew; | |
1026 | } | |
1027 | ||
b9362cc7 AC |
1028 | static void |
1029 | pop_current_type (void) | |
9819c6c8 PM |
1030 | { |
1031 | struct type_push *tp = tp_top; | |
1032 | if (tp) | |
1033 | { | |
1034 | current_type = tp->stored; | |
1035 | tp_top = tp->next; | |
1036 | xfree (tp); | |
1037 | } | |
1038 | } | |
1039 | ||
373a8247 PM |
1040 | struct token |
1041 | { | |
1042 | char *operator; | |
1043 | int token; | |
1044 | enum exp_opcode opcode; | |
1045 | }; | |
1046 | ||
1047 | static const struct token tokentab3[] = | |
1048 | { | |
1049 | {"shr", RSH, BINOP_END}, | |
1050 | {"shl", LSH, BINOP_END}, | |
1051 | {"and", ANDAND, BINOP_END}, | |
1052 | {"div", DIV, BINOP_END}, | |
1053 | {"not", NOT, BINOP_END}, | |
1054 | {"mod", MOD, BINOP_END}, | |
1055 | {"inc", INCREMENT, BINOP_END}, | |
1056 | {"dec", DECREMENT, BINOP_END}, | |
1057 | {"xor", XOR, BINOP_END} | |
1058 | }; | |
1059 | ||
1060 | static const struct token tokentab2[] = | |
1061 | { | |
1062 | {"or", OR, BINOP_END}, | |
1063 | {"<>", NOTEQUAL, BINOP_END}, | |
1064 | {"<=", LEQ, BINOP_END}, | |
1065 | {">=", GEQ, BINOP_END}, | |
9819c6c8 PM |
1066 | {":=", ASSIGN, BINOP_END}, |
1067 | {"::", COLONCOLON, BINOP_END} }; | |
373a8247 PM |
1068 | |
1069 | /* Allocate uppercased var */ | |
1070 | /* make an uppercased copy of tokstart */ | |
1071 | static char * uptok (tokstart, namelen) | |
1072 | char *tokstart; | |
1073 | int namelen; | |
1074 | { | |
1075 | int i; | |
1076 | char *uptokstart = (char *)malloc(namelen+1); | |
1077 | for (i = 0;i <= namelen;i++) | |
1078 | { | |
1079 | if ((tokstart[i]>='a' && tokstart[i]<='z')) | |
1080 | uptokstart[i] = tokstart[i]-('a'-'A'); | |
1081 | else | |
1082 | uptokstart[i] = tokstart[i]; | |
1083 | } | |
1084 | uptokstart[namelen]='\0'; | |
1085 | return uptokstart; | |
1086 | } | |
1087 | /* Read one token, getting characters through lexptr. */ | |
1088 | ||
1089 | ||
1090 | static int | |
1091 | yylex () | |
1092 | { | |
1093 | int c; | |
1094 | int namelen; | |
1095 | unsigned int i; | |
1096 | char *tokstart; | |
1097 | char *uptokstart; | |
1098 | char *tokptr; | |
1099 | char *p; | |
d3d6d173 | 1100 | int explen, tempbufindex; |
373a8247 PM |
1101 | static char *tempbuf; |
1102 | static int tempbufsize; | |
1103 | ||
1104 | retry: | |
1105 | ||
24467a86 PM |
1106 | prev_lexptr = lexptr; |
1107 | ||
373a8247 | 1108 | tokstart = lexptr; |
d3d6d173 | 1109 | explen = strlen (lexptr); |
373a8247 | 1110 | /* See if it is a special token of length 3. */ |
d3d6d173 PM |
1111 | if (explen > 2) |
1112 | for (i = 0; i < sizeof (tokentab3) / sizeof (tokentab3[0]); i++) | |
9c21ccdc | 1113 | if (strncasecmp (tokstart, tokentab3[i].operator, 3) == 0 |
d3d6d173 PM |
1114 | && (!isalpha (tokentab3[i].operator[0]) || explen == 3 |
1115 | || (!isalpha (tokstart[3]) && !isdigit (tokstart[3]) && tokstart[3] != '_'))) | |
1116 | { | |
1117 | lexptr += 3; | |
1118 | yylval.opcode = tokentab3[i].opcode; | |
1119 | return tokentab3[i].token; | |
1120 | } | |
373a8247 PM |
1121 | |
1122 | /* See if it is a special token of length 2. */ | |
d3d6d173 PM |
1123 | if (explen > 1) |
1124 | for (i = 0; i < sizeof (tokentab2) / sizeof (tokentab2[0]); i++) | |
9c21ccdc | 1125 | if (strncasecmp (tokstart, tokentab2[i].operator, 2) == 0 |
d3d6d173 PM |
1126 | && (!isalpha (tokentab2[i].operator[0]) || explen == 2 |
1127 | || (!isalpha (tokstart[2]) && !isdigit (tokstart[2]) && tokstart[2] != '_'))) | |
1128 | { | |
1129 | lexptr += 2; | |
1130 | yylval.opcode = tokentab2[i].opcode; | |
1131 | return tokentab2[i].token; | |
1132 | } | |
373a8247 PM |
1133 | |
1134 | switch (c = *tokstart) | |
1135 | { | |
1136 | case 0: | |
1137 | return 0; | |
1138 | ||
1139 | case ' ': | |
1140 | case '\t': | |
1141 | case '\n': | |
1142 | lexptr++; | |
1143 | goto retry; | |
1144 | ||
1145 | case '\'': | |
1146 | /* We either have a character constant ('0' or '\177' for example) | |
1147 | or we have a quoted symbol reference ('foo(int,int)' in object pascal | |
1148 | for example). */ | |
1149 | lexptr++; | |
1150 | c = *lexptr++; | |
1151 | if (c == '\\') | |
1152 | c = parse_escape (&lexptr); | |
1153 | else if (c == '\'') | |
1154 | error ("Empty character constant."); | |
1155 | ||
1156 | yylval.typed_val_int.val = c; | |
1157 | yylval.typed_val_int.type = builtin_type_char; | |
1158 | ||
1159 | c = *lexptr++; | |
1160 | if (c != '\'') | |
1161 | { | |
1162 | namelen = skip_quoted (tokstart) - tokstart; | |
1163 | if (namelen > 2) | |
1164 | { | |
1165 | lexptr = tokstart + namelen; | |
1166 | if (lexptr[-1] != '\'') | |
1167 | error ("Unmatched single quote."); | |
1168 | namelen -= 2; | |
1169 | tokstart++; | |
1170 | uptokstart = uptok(tokstart,namelen); | |
1171 | goto tryname; | |
1172 | } | |
1173 | error ("Invalid character constant."); | |
1174 | } | |
1175 | return INT; | |
1176 | ||
1177 | case '(': | |
1178 | paren_depth++; | |
1179 | lexptr++; | |
1180 | return c; | |
1181 | ||
1182 | case ')': | |
1183 | if (paren_depth == 0) | |
1184 | return 0; | |
1185 | paren_depth--; | |
1186 | lexptr++; | |
1187 | return c; | |
1188 | ||
1189 | case ',': | |
1190 | if (comma_terminates && paren_depth == 0) | |
1191 | return 0; | |
1192 | lexptr++; | |
1193 | return c; | |
1194 | ||
1195 | case '.': | |
1196 | /* Might be a floating point number. */ | |
1197 | if (lexptr[1] < '0' || lexptr[1] > '9') | |
1198 | goto symbol; /* Nope, must be a symbol. */ | |
1199 | /* FALL THRU into number case. */ | |
1200 | ||
1201 | case '0': | |
1202 | case '1': | |
1203 | case '2': | |
1204 | case '3': | |
1205 | case '4': | |
1206 | case '5': | |
1207 | case '6': | |
1208 | case '7': | |
1209 | case '8': | |
1210 | case '9': | |
1211 | { | |
1212 | /* It's a number. */ | |
1213 | int got_dot = 0, got_e = 0, toktype; | |
710122da | 1214 | char *p = tokstart; |
373a8247 PM |
1215 | int hex = input_radix > 10; |
1216 | ||
1217 | if (c == '0' && (p[1] == 'x' || p[1] == 'X')) | |
1218 | { | |
1219 | p += 2; | |
1220 | hex = 1; | |
1221 | } | |
1222 | else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D')) | |
1223 | { | |
1224 | p += 2; | |
1225 | hex = 0; | |
1226 | } | |
1227 | ||
1228 | for (;; ++p) | |
1229 | { | |
1230 | /* This test includes !hex because 'e' is a valid hex digit | |
1231 | and thus does not indicate a floating point number when | |
1232 | the radix is hex. */ | |
1233 | if (!hex && !got_e && (*p == 'e' || *p == 'E')) | |
1234 | got_dot = got_e = 1; | |
1235 | /* This test does not include !hex, because a '.' always indicates | |
1236 | a decimal floating point number regardless of the radix. */ | |
1237 | else if (!got_dot && *p == '.') | |
1238 | got_dot = 1; | |
1239 | else if (got_e && (p[-1] == 'e' || p[-1] == 'E') | |
1240 | && (*p == '-' || *p == '+')) | |
1241 | /* This is the sign of the exponent, not the end of the | |
1242 | number. */ | |
1243 | continue; | |
1244 | /* We will take any letters or digits. parse_number will | |
1245 | complain if past the radix, or if L or U are not final. */ | |
1246 | else if ((*p < '0' || *p > '9') | |
1247 | && ((*p < 'a' || *p > 'z') | |
1248 | && (*p < 'A' || *p > 'Z'))) | |
1249 | break; | |
1250 | } | |
1251 | toktype = parse_number (tokstart, p - tokstart, got_dot|got_e, &yylval); | |
1252 | if (toktype == ERROR) | |
1253 | { | |
1254 | char *err_copy = (char *) alloca (p - tokstart + 1); | |
1255 | ||
1256 | memcpy (err_copy, tokstart, p - tokstart); | |
1257 | err_copy[p - tokstart] = 0; | |
1258 | error ("Invalid number \"%s\".", err_copy); | |
1259 | } | |
1260 | lexptr = p; | |
1261 | return toktype; | |
1262 | } | |
1263 | ||
1264 | case '+': | |
1265 | case '-': | |
1266 | case '*': | |
1267 | case '/': | |
1268 | case '|': | |
1269 | case '&': | |
1270 | case '^': | |
1271 | case '~': | |
1272 | case '!': | |
1273 | case '@': | |
1274 | case '<': | |
1275 | case '>': | |
1276 | case '[': | |
1277 | case ']': | |
1278 | case '?': | |
1279 | case ':': | |
1280 | case '=': | |
1281 | case '{': | |
1282 | case '}': | |
1283 | symbol: | |
1284 | lexptr++; | |
1285 | return c; | |
1286 | ||
1287 | case '"': | |
1288 | ||
1289 | /* Build the gdb internal form of the input string in tempbuf, | |
1290 | translating any standard C escape forms seen. Note that the | |
1291 | buffer is null byte terminated *only* for the convenience of | |
1292 | debugging gdb itself and printing the buffer contents when | |
1293 | the buffer contains no embedded nulls. Gdb does not depend | |
1294 | upon the buffer being null byte terminated, it uses the length | |
1295 | string instead. This allows gdb to handle C strings (as well | |
1296 | as strings in other languages) with embedded null bytes */ | |
1297 | ||
1298 | tokptr = ++tokstart; | |
1299 | tempbufindex = 0; | |
1300 | ||
1301 | do { | |
1302 | /* Grow the static temp buffer if necessary, including allocating | |
1303 | the first one on demand. */ | |
1304 | if (tempbufindex + 1 >= tempbufsize) | |
1305 | { | |
1306 | tempbuf = (char *) realloc (tempbuf, tempbufsize += 64); | |
1307 | } | |
9819c6c8 | 1308 | |
373a8247 PM |
1309 | switch (*tokptr) |
1310 | { | |
1311 | case '\0': | |
1312 | case '"': | |
1313 | /* Do nothing, loop will terminate. */ | |
1314 | break; | |
1315 | case '\\': | |
1316 | tokptr++; | |
1317 | c = parse_escape (&tokptr); | |
1318 | if (c == -1) | |
1319 | { | |
1320 | continue; | |
1321 | } | |
1322 | tempbuf[tempbufindex++] = c; | |
1323 | break; | |
1324 | default: | |
1325 | tempbuf[tempbufindex++] = *tokptr++; | |
1326 | break; | |
1327 | } | |
1328 | } while ((*tokptr != '"') && (*tokptr != '\0')); | |
1329 | if (*tokptr++ != '"') | |
1330 | { | |
1331 | error ("Unterminated string in expression."); | |
1332 | } | |
1333 | tempbuf[tempbufindex] = '\0'; /* See note above */ | |
1334 | yylval.sval.ptr = tempbuf; | |
1335 | yylval.sval.length = tempbufindex; | |
1336 | lexptr = tokptr; | |
1337 | return (STRING); | |
1338 | } | |
1339 | ||
1340 | if (!(c == '_' || c == '$' | |
1341 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))) | |
1342 | /* We must have come across a bad character (e.g. ';'). */ | |
1343 | error ("Invalid character '%c' in expression.", c); | |
1344 | ||
1345 | /* It's a name. See how long it is. */ | |
1346 | namelen = 0; | |
1347 | for (c = tokstart[namelen]; | |
1348 | (c == '_' || c == '$' || (c >= '0' && c <= '9') | |
1349 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');) | |
1350 | { | |
1351 | /* Template parameter lists are part of the name. | |
1352 | FIXME: This mishandles `print $a<4&&$a>3'. */ | |
1353 | if (c == '<') | |
1354 | { | |
1355 | int i = namelen; | |
1356 | int nesting_level = 1; | |
1357 | while (tokstart[++i]) | |
1358 | { | |
1359 | if (tokstart[i] == '<') | |
1360 | nesting_level++; | |
1361 | else if (tokstart[i] == '>') | |
1362 | { | |
1363 | if (--nesting_level == 0) | |
1364 | break; | |
1365 | } | |
1366 | } | |
1367 | if (tokstart[i] == '>') | |
1368 | namelen = i; | |
1369 | else | |
1370 | break; | |
1371 | } | |
1372 | ||
1373 | /* do NOT uppercase internals because of registers !!! */ | |
1374 | c = tokstart[++namelen]; | |
1375 | } | |
1376 | ||
1377 | uptokstart = uptok(tokstart,namelen); | |
1378 | ||
1379 | /* The token "if" terminates the expression and is NOT | |
1380 | removed from the input stream. */ | |
1381 | if (namelen == 2 && uptokstart[0] == 'I' && uptokstart[1] == 'F') | |
1382 | { | |
7877e977 | 1383 | free (uptokstart); |
373a8247 PM |
1384 | return 0; |
1385 | } | |
1386 | ||
1387 | lexptr += namelen; | |
1388 | ||
1389 | tryname: | |
1390 | ||
1391 | /* Catch specific keywords. Should be done with a data structure. */ | |
1392 | switch (namelen) | |
1393 | { | |
1394 | case 6: | |
0b058123 | 1395 | if (strcmp (uptokstart, "OBJECT") == 0) |
7877e977 MS |
1396 | { |
1397 | free (uptokstart); | |
1398 | return CLASS; | |
1399 | } | |
0b058123 | 1400 | if (strcmp (uptokstart, "RECORD") == 0) |
7877e977 MS |
1401 | { |
1402 | free (uptokstart); | |
1403 | return STRUCT; | |
1404 | } | |
0b058123 | 1405 | if (strcmp (uptokstart, "SIZEOF") == 0) |
7877e977 MS |
1406 | { |
1407 | free (uptokstart); | |
1408 | return SIZEOF; | |
1409 | } | |
373a8247 PM |
1410 | break; |
1411 | case 5: | |
0b058123 | 1412 | if (strcmp (uptokstart, "CLASS") == 0) |
7877e977 MS |
1413 | { |
1414 | free (uptokstart); | |
1415 | return CLASS; | |
1416 | } | |
0b058123 | 1417 | if (strcmp (uptokstart, "FALSE") == 0) |
373a8247 PM |
1418 | { |
1419 | yylval.lval = 0; | |
7877e977 | 1420 | free (uptokstart); |
2692ddb3 | 1421 | return FALSEKEYWORD; |
373a8247 PM |
1422 | } |
1423 | break; | |
1424 | case 4: | |
0b058123 | 1425 | if (strcmp (uptokstart, "TRUE") == 0) |
373a8247 PM |
1426 | { |
1427 | yylval.lval = 1; | |
7877e977 | 1428 | free (uptokstart); |
2692ddb3 | 1429 | return TRUEKEYWORD; |
373a8247 | 1430 | } |
0b058123 | 1431 | if (strcmp (uptokstart, "SELF") == 0) |
373a8247 PM |
1432 | { |
1433 | /* here we search for 'this' like | |
1434 | inserted in FPC stabs debug info */ | |
8343f86c | 1435 | static const char this_name[] = "this"; |
373a8247 PM |
1436 | |
1437 | if (lookup_symbol (this_name, expression_context_block, | |
176620f1 | 1438 | VAR_DOMAIN, (int *) NULL, |
373a8247 | 1439 | (struct symtab **) NULL)) |
7877e977 MS |
1440 | { |
1441 | free (uptokstart); | |
1442 | return THIS; | |
1443 | } | |
373a8247 PM |
1444 | } |
1445 | break; | |
1446 | default: | |
1447 | break; | |
1448 | } | |
1449 | ||
1450 | yylval.sval.ptr = tokstart; | |
1451 | yylval.sval.length = namelen; | |
1452 | ||
1453 | if (*tokstart == '$') | |
1454 | { | |
1455 | /* $ is the normal prefix for pascal hexadecimal values | |
1456 | but this conflicts with the GDB use for debugger variables | |
1457 | so in expression to enter hexadecimal values | |
1458 | we still need to use C syntax with 0xff */ | |
1459 | write_dollar_variable (yylval.sval); | |
7877e977 | 1460 | free (uptokstart); |
373a8247 PM |
1461 | return VARIABLE; |
1462 | } | |
1463 | ||
1464 | /* Use token-type BLOCKNAME for symbols that happen to be defined as | |
1465 | functions or symtabs. If this is not so, then ... | |
1466 | Use token-type TYPENAME for symbols that happen to be defined | |
1467 | currently as names of types; NAME for other symbols. | |
1468 | The caller is not constrained to care about the distinction. */ | |
1469 | { | |
1470 | char *tmp = copy_name (yylval.sval); | |
1471 | struct symbol *sym; | |
1472 | int is_a_field_of_this = 0; | |
9819c6c8 | 1473 | int is_a_field = 0; |
373a8247 PM |
1474 | int hextype; |
1475 | ||
9819c6c8 PM |
1476 | |
1477 | if (search_field && current_type) | |
1478 | is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL); | |
1479 | if (is_a_field) | |
1480 | sym = NULL; | |
1481 | else | |
1482 | sym = lookup_symbol (tmp, expression_context_block, | |
176620f1 | 1483 | VAR_DOMAIN, |
9819c6c8 PM |
1484 | &is_a_field_of_this, |
1485 | (struct symtab **) NULL); | |
94a716bf | 1486 | /* second chance uppercased (as Free Pascal does). */ |
9819c6c8 | 1487 | if (!sym && !is_a_field_of_this && !is_a_field) |
373a8247 | 1488 | { |
94a716bf | 1489 | for (i = 0; i <= namelen; i++) |
373a8247 | 1490 | { |
94a716bf | 1491 | if ((tmp[i] >= 'a' && tmp[i] <= 'z')) |
373a8247 | 1492 | tmp[i] -= ('a'-'A'); |
373a8247 | 1493 | } |
9819c6c8 PM |
1494 | if (search_field && current_type) |
1495 | is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL); | |
1496 | if (is_a_field) | |
1497 | sym = NULL; | |
1498 | else | |
1499 | sym = lookup_symbol (tmp, expression_context_block, | |
176620f1 | 1500 | VAR_DOMAIN, |
94a716bf PM |
1501 | &is_a_field_of_this, |
1502 | (struct symtab **) NULL); | |
9819c6c8 | 1503 | if (sym || is_a_field_of_this || is_a_field) |
94a716bf PM |
1504 | for (i = 0; i <= namelen; i++) |
1505 | { | |
1506 | if ((tokstart[i] >= 'a' && tokstart[i] <= 'z')) | |
1507 | tokstart[i] -= ('a'-'A'); | |
1508 | } | |
1509 | } | |
1510 | /* Third chance Capitalized (as GPC does). */ | |
9819c6c8 | 1511 | if (!sym && !is_a_field_of_this && !is_a_field) |
94a716bf PM |
1512 | { |
1513 | for (i = 0; i <= namelen; i++) | |
1514 | { | |
1515 | if (i == 0) | |
1516 | { | |
1517 | if ((tmp[i] >= 'a' && tmp[i] <= 'z')) | |
1518 | tmp[i] -= ('a'-'A'); | |
1519 | } | |
1520 | else | |
1521 | if ((tmp[i] >= 'A' && tmp[i] <= 'Z')) | |
1522 | tmp[i] -= ('A'-'a'); | |
1523 | } | |
9819c6c8 PM |
1524 | if (search_field && current_type) |
1525 | is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL); | |
1526 | if (is_a_field) | |
1527 | sym = NULL; | |
1528 | else | |
1529 | sym = lookup_symbol (tmp, expression_context_block, | |
176620f1 | 1530 | VAR_DOMAIN, |
94a716bf PM |
1531 | &is_a_field_of_this, |
1532 | (struct symtab **) NULL); | |
9819c6c8 | 1533 | if (sym || is_a_field_of_this || is_a_field) |
94a716bf PM |
1534 | for (i = 0; i <= namelen; i++) |
1535 | { | |
1536 | if (i == 0) | |
1537 | { | |
1538 | if ((tokstart[i] >= 'a' && tokstart[i] <= 'z')) | |
1539 | tokstart[i] -= ('a'-'A'); | |
1540 | } | |
1541 | else | |
1542 | if ((tokstart[i] >= 'A' && tokstart[i] <= 'Z')) | |
1543 | tokstart[i] -= ('A'-'a'); | |
1544 | } | |
373a8247 | 1545 | } |
9819c6c8 PM |
1546 | |
1547 | if (is_a_field) | |
1548 | { | |
1549 | tempbuf = (char *) realloc (tempbuf, namelen + 1); | |
1550 | strncpy (tempbuf, tokstart, namelen); tempbuf [namelen] = 0; | |
1551 | yylval.sval.ptr = tempbuf; | |
1552 | yylval.sval.length = namelen; | |
7877e977 | 1553 | free (uptokstart); |
9819c6c8 PM |
1554 | return FIELDNAME; |
1555 | } | |
373a8247 PM |
1556 | /* Call lookup_symtab, not lookup_partial_symtab, in case there are |
1557 | no psymtabs (coff, xcoff, or some future change to blow away the | |
1558 | psymtabs once once symbols are read). */ | |
0b058123 PM |
1559 | if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK) |
1560 | || lookup_symtab (tmp)) | |
373a8247 PM |
1561 | { |
1562 | yylval.ssym.sym = sym; | |
1563 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; | |
7877e977 | 1564 | free (uptokstart); |
373a8247 PM |
1565 | return BLOCKNAME; |
1566 | } | |
1567 | if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF) | |
1568 | { | |
1569 | #if 1 | |
1570 | /* Despite the following flaw, we need to keep this code enabled. | |
1571 | Because we can get called from check_stub_method, if we don't | |
1572 | handle nested types then it screws many operations in any | |
1573 | program which uses nested types. */ | |
1574 | /* In "A::x", if x is a member function of A and there happens | |
1575 | to be a type (nested or not, since the stabs don't make that | |
1576 | distinction) named x, then this code incorrectly thinks we | |
1577 | are dealing with nested types rather than a member function. */ | |
1578 | ||
1579 | char *p; | |
1580 | char *namestart; | |
1581 | struct symbol *best_sym; | |
1582 | ||
1583 | /* Look ahead to detect nested types. This probably should be | |
1584 | done in the grammar, but trying seemed to introduce a lot | |
1585 | of shift/reduce and reduce/reduce conflicts. It's possible | |
1586 | that it could be done, though. Or perhaps a non-grammar, but | |
1587 | less ad hoc, approach would work well. */ | |
1588 | ||
1589 | /* Since we do not currently have any way of distinguishing | |
1590 | a nested type from a non-nested one (the stabs don't tell | |
1591 | us whether a type is nested), we just ignore the | |
1592 | containing type. */ | |
1593 | ||
1594 | p = lexptr; | |
1595 | best_sym = sym; | |
1596 | while (1) | |
1597 | { | |
1598 | /* Skip whitespace. */ | |
1599 | while (*p == ' ' || *p == '\t' || *p == '\n') | |
1600 | ++p; | |
1601 | if (*p == ':' && p[1] == ':') | |
1602 | { | |
1603 | /* Skip the `::'. */ | |
1604 | p += 2; | |
1605 | /* Skip whitespace. */ | |
1606 | while (*p == ' ' || *p == '\t' || *p == '\n') | |
1607 | ++p; | |
1608 | namestart = p; | |
1609 | while (*p == '_' || *p == '$' || (*p >= '0' && *p <= '9') | |
1610 | || (*p >= 'a' && *p <= 'z') | |
1611 | || (*p >= 'A' && *p <= 'Z')) | |
1612 | ++p; | |
1613 | if (p != namestart) | |
1614 | { | |
1615 | struct symbol *cur_sym; | |
1616 | /* As big as the whole rest of the expression, which is | |
1617 | at least big enough. */ | |
1618 | char *ncopy = alloca (strlen (tmp)+strlen (namestart)+3); | |
1619 | char *tmp1; | |
1620 | ||
1621 | tmp1 = ncopy; | |
1622 | memcpy (tmp1, tmp, strlen (tmp)); | |
1623 | tmp1 += strlen (tmp); | |
1624 | memcpy (tmp1, "::", 2); | |
1625 | tmp1 += 2; | |
1626 | memcpy (tmp1, namestart, p - namestart); | |
1627 | tmp1[p - namestart] = '\0'; | |
1628 | cur_sym = lookup_symbol (ncopy, expression_context_block, | |
176620f1 | 1629 | VAR_DOMAIN, (int *) NULL, |
373a8247 PM |
1630 | (struct symtab **) NULL); |
1631 | if (cur_sym) | |
1632 | { | |
1633 | if (SYMBOL_CLASS (cur_sym) == LOC_TYPEDEF) | |
1634 | { | |
1635 | best_sym = cur_sym; | |
1636 | lexptr = p; | |
1637 | } | |
1638 | else | |
1639 | break; | |
1640 | } | |
1641 | else | |
1642 | break; | |
1643 | } | |
1644 | else | |
1645 | break; | |
1646 | } | |
1647 | else | |
1648 | break; | |
1649 | } | |
1650 | ||
1651 | yylval.tsym.type = SYMBOL_TYPE (best_sym); | |
1652 | #else /* not 0 */ | |
1653 | yylval.tsym.type = SYMBOL_TYPE (sym); | |
1654 | #endif /* not 0 */ | |
7877e977 | 1655 | free (uptokstart); |
373a8247 PM |
1656 | return TYPENAME; |
1657 | } | |
54a5b07d AC |
1658 | yylval.tsym.type |
1659 | = language_lookup_primitive_type_by_name (current_language, | |
1660 | current_gdbarch, tmp); | |
1661 | if (yylval.tsym.type != NULL) | |
7877e977 MS |
1662 | { |
1663 | free (uptokstart); | |
1664 | return TYPENAME; | |
1665 | } | |
373a8247 PM |
1666 | |
1667 | /* Input names that aren't symbols but ARE valid hex numbers, | |
1668 | when the input radix permits them, can be names or numbers | |
1669 | depending on the parse. Note we support radixes > 16 here. */ | |
0b058123 PM |
1670 | if (!sym |
1671 | && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) | |
1672 | || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10))) | |
373a8247 PM |
1673 | { |
1674 | YYSTYPE newlval; /* Its value is ignored. */ | |
1675 | hextype = parse_number (tokstart, namelen, 0, &newlval); | |
1676 | if (hextype == INT) | |
1677 | { | |
1678 | yylval.ssym.sym = sym; | |
1679 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; | |
7877e977 | 1680 | free (uptokstart); |
373a8247 PM |
1681 | return NAME_OR_INT; |
1682 | } | |
1683 | } | |
1684 | ||
1685 | free(uptokstart); | |
1686 | /* Any other kind of symbol */ | |
1687 | yylval.ssym.sym = sym; | |
1688 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; | |
1689 | return NAME; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | void | |
1694 | yyerror (msg) | |
1695 | char *msg; | |
1696 | { | |
24467a86 PM |
1697 | if (prev_lexptr) |
1698 | lexptr = prev_lexptr; | |
1699 | ||
373a8247 PM |
1700 | error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr); |
1701 | } |