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c8023e66 JG |
1 | /* Multiple source language support for GDB. |
2 | Copyright 1991 Free Software Foundation, Inc. | |
3 | Contributed by the Department of Computer Science at the State University | |
4 | of New York at Buffalo. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* This file contains functions that return things that are specific | |
23 | to languages. Each function should examine current_language if necessary, | |
24 | and return the appropriate result. */ | |
25 | ||
26 | /* FIXME: Most of these would be better organized as macros which | |
27 | return data out of a "language-specific" struct pointer that is set | |
28 | whenever the working language changes. That would be a lot faster. */ | |
29 | ||
30 | #include <stdio.h> | |
31 | #include <string.h> | |
32 | #include <varargs.h> | |
33 | ||
34 | #include "defs.h" | |
35 | #include "symtab.h" | |
36 | #include "value.h" | |
37 | #include "gdbcmd.h" | |
38 | #include "frame.h" | |
39 | #include "language.h" | |
40 | #include "expression.h" | |
41 | #include "target.h" | |
42 | #include "parser-defs.h" | |
43 | ||
c4668207 JG |
44 | extern volatile void return_to_top_level (); |
45 | ||
c8023e66 JG |
46 | /* Forward function declarations */ |
47 | static void set_type_range (); | |
48 | ||
49 | /* Forward declaration */ | |
50 | extern struct language_defn unknown_language_defn; | |
51 | ||
52 | /* The current (default at startup) state of type and range checking. | |
53 | (If the modes are set to "auto", though, these are changed based | |
54 | on the default language at startup, and then again based on the | |
55 | language of the first source file. */ | |
56 | ||
57 | enum range_mode range_mode = range_mode_auto; | |
58 | enum range_check range_check = range_check_off; | |
59 | enum type_mode type_mode = type_mode_auto; | |
60 | enum type_check type_check = type_check_off; | |
61 | ||
62 | /* The current language and language_mode (see language.h) */ | |
63 | ||
64 | struct language_defn *current_language = &unknown_language_defn; | |
65 | enum language_mode language_mode = language_mode_auto; | |
66 | ||
67 | /* The list of supported languages. The list itself is malloc'd. */ | |
68 | ||
69 | static struct language_defn **languages; | |
70 | static unsigned languages_size; | |
71 | static unsigned languages_allocsize; | |
72 | #define DEFAULT_ALLOCSIZE 3 | |
73 | ||
74 | /* The "set language/type/range" commands all put stuff in these | |
75 | buffers. This is to make them work as set/show commands. The | |
76 | user's string is copied here, then the set_* commands look at | |
77 | them and update them to something that looks nice when it is | |
78 | printed out. */ | |
79 | ||
80 | static char *language; | |
81 | static char *type; | |
82 | static char *range; | |
83 | ||
84 | /* Warning issued when current_language and the language of the current | |
85 | frame do not match. */ | |
86 | char lang_frame_mismatch_warn[] = | |
87 | "Warning: the current language does not match this frame."; | |
88 | ||
89 | void set_lang_str(); | |
90 | void set_type_str(); | |
91 | void set_range_str(); | |
92 | \f | |
93 | /* This page contains the functions corresponding to GDB commands | |
94 | and their helpers. */ | |
95 | ||
96 | /* Show command. Display a warning if the language set | |
97 | does not match the frame. */ | |
98 | void | |
d8ce1326 JG |
99 | show_language_command (ignore, from_tty) |
100 | char *ignore; | |
c8023e66 JG |
101 | int from_tty; |
102 | { | |
103 | enum language flang; /* The language of the current frame */ | |
104 | ||
105 | flang = get_frame_language(); | |
106 | if (flang != language_unknown && | |
107 | language_mode == language_mode_manual && | |
108 | current_language->la_language != flang) | |
109 | printf_filtered("%s\n",lang_frame_mismatch_warn); | |
110 | } | |
111 | ||
112 | /* Set command. Change the current working language. */ | |
113 | void | |
d8ce1326 JG |
114 | set_language_command (ignore, from_tty) |
115 | char *ignore; | |
c8023e66 JG |
116 | int from_tty; |
117 | { | |
118 | int i; | |
119 | enum language flang; | |
5f3d478e | 120 | char *err_lang; |
c8023e66 JG |
121 | |
122 | /* FIXME -- do this from the list, with HELP. */ | |
123 | if (!language || !language[0]) { | |
124 | printf("The currently understood settings are:\n\n\ | |
125 | local or auto Automatic setting based on source file\n\ | |
0b798409 | 126 | c Use the C language\n\ |
545af6ce | 127 | c++ Use the C++ language\n\ |
0b798409 JG |
128 | modula-2 Use the Modula-2 language\n"); |
129 | /* Restore the silly string. */ | |
130 | set_language(current_language->la_language); | |
c8023e66 JG |
131 | return; |
132 | } | |
133 | ||
134 | /* Search the list of languages for a match. */ | |
135 | for (i = 0; i < languages_size; i++) { | |
136 | if (!strcmp (languages[i]->la_name, language)) { | |
137 | /* Found it! Go into manual mode, and use this language. */ | |
138 | if (languages[i]->la_language == language_auto) { | |
139 | /* Enter auto mode. Set to the current frame's language, if known. */ | |
140 | language_mode = language_mode_auto; | |
141 | flang = get_frame_language(); | |
142 | if (flang!=language_unknown) | |
143 | set_language(flang); | |
144 | return; | |
145 | } else { | |
146 | /* Enter manual mode. Set the specified language. */ | |
147 | language_mode = language_mode_manual; | |
148 | current_language = languages[i]; | |
149 | set_type_range (); | |
150 | set_lang_str(); | |
151 | return; | |
152 | } | |
153 | } | |
154 | } | |
155 | ||
5f3d478e JG |
156 | /* Reset the language (esp. the global string "language") to the |
157 | correct values. */ | |
158 | err_lang=savestring(language,strlen(language)); | |
159 | make_cleanup (free, err_lang); /* Free it after error */ | |
160 | set_language(current_language->la_language); | |
161 | error ("Unknown language `%s'.",err_lang); | |
c8023e66 JG |
162 | } |
163 | ||
164 | /* Show command. Display a warning if the type setting does | |
165 | not match the current language. */ | |
166 | void | |
d8ce1326 JG |
167 | show_type_command(ignore, from_tty) |
168 | char *ignore; | |
c8023e66 JG |
169 | int from_tty; |
170 | { | |
171 | if (type_check != current_language->la_type_check) | |
172 | printf( | |
173 | "Warning: the current type check setting does not match the language.\n"); | |
174 | } | |
175 | ||
176 | /* Set command. Change the setting for type checking. */ | |
177 | void | |
d8ce1326 JG |
178 | set_type_command(ignore, from_tty) |
179 | char *ignore; | |
c8023e66 JG |
180 | int from_tty; |
181 | { | |
182 | if (!strcmp(type,"on")) | |
183 | { | |
184 | type_check = type_check_on; | |
185 | type_mode = type_mode_manual; | |
186 | } | |
187 | else if (!strcmp(type,"warn")) | |
188 | { | |
189 | type_check = type_check_warn; | |
190 | type_mode = type_mode_manual; | |
191 | } | |
192 | else if (!strcmp(type,"off")) | |
193 | { | |
194 | type_check = type_check_off; | |
195 | type_mode = type_mode_manual; | |
196 | } | |
197 | else if (!strcmp(type,"auto")) | |
198 | { | |
199 | type_mode = type_mode_auto; | |
200 | set_type_range(); | |
201 | /* Avoid hitting the set_type_str call below. We | |
202 | did it in set_type_range. */ | |
203 | return; | |
204 | } | |
205 | set_type_str(); | |
d8ce1326 | 206 | show_type_command((char *)NULL, from_tty); |
c8023e66 JG |
207 | } |
208 | ||
209 | /* Show command. Display a warning if the range setting does | |
210 | not match the current language. */ | |
211 | void | |
d8ce1326 JG |
212 | show_range_command(ignore, from_tty) |
213 | char *ignore; | |
c8023e66 JG |
214 | int from_tty; |
215 | { | |
216 | ||
217 | if (range_check != current_language->la_range_check) | |
218 | printf( | |
219 | "Warning: the current range check setting does not match the language.\n"); | |
220 | } | |
221 | ||
222 | /* Set command. Change the setting for range checking. */ | |
223 | void | |
d8ce1326 JG |
224 | set_range_command(ignore, from_tty) |
225 | char *ignore; | |
c8023e66 JG |
226 | int from_tty; |
227 | { | |
228 | if (!strcmp(range,"on")) | |
229 | { | |
230 | range_check = range_check_on; | |
231 | range_mode = range_mode_manual; | |
232 | } | |
233 | else if (!strcmp(range,"warn")) | |
234 | { | |
235 | range_check = range_check_warn; | |
236 | range_mode = range_mode_manual; | |
237 | } | |
238 | else if (!strcmp(range,"off")) | |
239 | { | |
240 | range_check = range_check_off; | |
241 | range_mode = range_mode_manual; | |
242 | } | |
243 | else if (!strcmp(range,"auto")) | |
244 | { | |
245 | range_mode = range_mode_auto; | |
246 | set_type_range(); | |
247 | /* Avoid hitting the set_range_str call below. We | |
248 | did it in set_type_range. */ | |
249 | return; | |
250 | } | |
251 | set_range_str(); | |
d8ce1326 | 252 | show_range_command((char *)0, from_tty); |
c8023e66 JG |
253 | } |
254 | ||
255 | /* Set the status of range and type checking based on | |
256 | the current modes and the current language. | |
257 | If SHOW is non-zero, then print out the current language, | |
258 | type and range checking status. */ | |
259 | static void | |
260 | set_type_range() | |
261 | { | |
c8023e66 JG |
262 | |
263 | if (range_mode == range_mode_auto) | |
264 | range_check = current_language->la_range_check; | |
265 | ||
266 | if (type_mode == type_mode_auto) | |
267 | type_check = current_language->la_type_check; | |
268 | ||
269 | set_type_str(); | |
270 | set_range_str(); | |
271 | } | |
272 | ||
273 | /* Set current language to (enum language) LANG. */ | |
274 | ||
275 | void | |
276 | set_language(lang) | |
277 | enum language lang; | |
278 | { | |
279 | int i; | |
280 | ||
281 | for (i = 0; i < languages_size; i++) { | |
282 | if (languages[i]->la_language == lang) { | |
283 | current_language = languages[i]; | |
284 | set_type_range (); | |
285 | set_lang_str(); | |
545af6ce | 286 | break; |
c8023e66 JG |
287 | } |
288 | } | |
289 | } | |
290 | \f | |
291 | /* This page contains functions that update the global vars | |
292 | language, type and range. */ | |
293 | void | |
294 | set_lang_str() | |
295 | { | |
d8ce1326 | 296 | char *prefix = ""; |
c8023e66 JG |
297 | |
298 | free (language); | |
299 | if (language_mode == language_mode_auto) | |
300 | prefix = "auto; currently "; | |
301 | ||
58ae87f6 | 302 | language = concat(prefix, current_language->la_name, NULL); |
c8023e66 JG |
303 | } |
304 | ||
305 | void | |
306 | set_type_str() | |
307 | { | |
308 | char *tmp, *prefix = ""; | |
309 | ||
310 | free (type); | |
311 | if (type_mode==type_mode_auto) | |
312 | prefix = "auto; currently "; | |
313 | ||
314 | switch(type_check) | |
315 | { | |
316 | case type_check_on: | |
317 | tmp = "on"; | |
318 | break; | |
319 | case type_check_off: | |
320 | tmp = "off"; | |
321 | break; | |
322 | case type_check_warn: | |
323 | tmp = "warn"; | |
324 | break; | |
325 | default: | |
326 | error ("Unrecognized type check setting."); | |
327 | } | |
328 | ||
58ae87f6 | 329 | type = concat(prefix,tmp,NULL); |
c8023e66 JG |
330 | } |
331 | ||
332 | void | |
333 | set_range_str() | |
334 | { | |
335 | char *tmp, *pref = ""; | |
336 | ||
337 | free (range); | |
338 | if (range_mode==range_mode_auto) | |
339 | pref = "auto; currently "; | |
340 | ||
341 | switch(range_check) | |
342 | { | |
343 | case range_check_on: | |
344 | tmp = "on"; | |
345 | break; | |
346 | case range_check_off: | |
347 | tmp = "off"; | |
348 | break; | |
349 | case range_check_warn: | |
350 | tmp = "warn"; | |
351 | break; | |
352 | default: | |
353 | error ("Unrecognized range check setting."); | |
354 | } | |
355 | ||
58ae87f6 | 356 | range = concat(pref,tmp,NULL); |
c8023e66 JG |
357 | } |
358 | ||
359 | ||
360 | /* Print out the current language settings: language, range and | |
361 | type checking. */ | |
362 | void | |
363 | language_info () | |
364 | { | |
365 | printf("Current Language: %s\n",language); | |
d8ce1326 | 366 | show_language_command((char *)0, 1); |
c8023e66 | 367 | printf("Type checking: %s\n",type); |
d8ce1326 | 368 | show_type_command((char *)0, 1); |
c8023e66 | 369 | printf("Range checking: %s\n",range); |
d8ce1326 | 370 | show_range_command((char *)0, 1); |
c8023e66 JG |
371 | } |
372 | \f | |
373 | /* Return the result of a binary operation. */ | |
374 | struct type * | |
375 | binop_result_type(v1,v2) | |
376 | value v1,v2; | |
377 | { | |
378 | int l1,l2,size,uns; | |
379 | ||
d8ce1326 JG |
380 | l1 = TYPE_LENGTH(VALUE_TYPE(v1)); |
381 | l2 = TYPE_LENGTH(VALUE_TYPE(v2)); | |
c8023e66 JG |
382 | |
383 | switch(current_language->la_language) | |
384 | { | |
385 | case language_c: | |
545af6ce | 386 | case language_cplus: |
c8023e66 JG |
387 | if (TYPE_CODE(VALUE_TYPE(v1))==TYPE_CODE_FLT) |
388 | return TYPE_CODE(VALUE_TYPE(v2)) == TYPE_CODE_FLT && l2 > l1 ? | |
389 | VALUE_TYPE(v2) : VALUE_TYPE(v1); | |
390 | else if (TYPE_CODE(VALUE_TYPE(v2))==TYPE_CODE_FLT) | |
391 | return TYPE_CODE(VALUE_TYPE(v1)) == TYPE_CODE_FLT && l1 > l2 ? | |
392 | VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
393 | else if (TYPE_UNSIGNED(VALUE_TYPE(v1)) && l1 > l2) | |
394 | return VALUE_TYPE(v1); | |
395 | else if (TYPE_UNSIGNED(VALUE_TYPE(v2)) && l2 > l1) | |
396 | return VALUE_TYPE(v2); | |
397 | else /* Both are signed. Result is the longer type */ | |
398 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
399 | break; | |
400 | case language_m2: | |
401 | /* If we are doing type-checking, l1 should equal l2, so this is | |
402 | not needed. */ | |
403 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
404 | break; | |
405 | } | |
d8ce1326 JG |
406 | abort(); |
407 | return (struct type *)0; /* For lint */ | |
c8023e66 JG |
408 | } |
409 | \f | |
410 | /* This page contains functions that return format strings for | |
411 | printf for printing out numbers in different formats */ | |
412 | ||
413 | /* Returns the appropriate printf format for hexadecimal | |
414 | numbers. */ | |
415 | char * | |
416 | local_hex_format_custom(pre) | |
417 | char *pre; | |
418 | { | |
419 | static char form[50]; | |
420 | ||
421 | strcpy (form, current_language->la_hex_format_pre); | |
422 | strcat (form, pre); | |
423 | strcat (form, current_language->la_hex_format_suf); | |
424 | return form; | |
425 | } | |
426 | ||
427 | /* Converts a number to hexadecimal and stores it in a static | |
428 | string. Returns a pointer to this string. */ | |
429 | char * | |
430 | local_hex_string (num) | |
431 | int num; | |
432 | { | |
433 | static char res[50]; | |
434 | ||
435 | sprintf (res, current_language->la_hex_format, num); | |
436 | return res; | |
437 | } | |
438 | ||
439 | /* Converts a number to custom hexadecimal and stores it in a static | |
440 | string. Returns a pointer to this string. */ | |
441 | char * | |
442 | local_hex_string_custom(num,pre) | |
443 | int num; | |
444 | char *pre; | |
445 | { | |
446 | static char res[50]; | |
447 | ||
448 | sprintf (res, local_hex_format_custom(pre), num); | |
449 | return res; | |
450 | } | |
451 | ||
452 | /* Returns the appropriate printf format for octal | |
453 | numbers. */ | |
454 | char * | |
455 | local_octal_format_custom(pre) | |
456 | char *pre; | |
457 | { | |
458 | static char form[50]; | |
459 | ||
460 | strcpy (form, current_language->la_octal_format_pre); | |
461 | strcat (form, pre); | |
462 | strcat (form, current_language->la_octal_format_suf); | |
463 | return form; | |
464 | } | |
465 | \f | |
466 | /* This page contains functions that are used in type/range checking. | |
467 | They all return zero if the type/range check fails. | |
468 | ||
469 | It is hoped that these will make extending GDB to parse different | |
470 | languages a little easier. These are primarily used in eval.c when | |
471 | evaluating expressions and making sure that their types are correct. | |
472 | Instead of having a mess of conjucted/disjuncted expressions in an "if", | |
473 | the ideas of type can be wrapped up in the following functions. | |
474 | ||
475 | Note that some of them are not currently dependent upon which language | |
476 | is currently being parsed. For example, floats are the same in | |
477 | C and Modula-2 (ie. the only floating point type has TYPE_CODE of | |
478 | TYPE_CODE_FLT), while booleans are different. */ | |
479 | ||
480 | /* Returns non-zero if its argument is a simple type. This is the same for | |
481 | both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur, | |
482 | and thus will never cause the failure of the test. */ | |
483 | int | |
484 | simple_type(type) | |
485 | struct type *type; | |
486 | { | |
487 | switch (TYPE_CODE (type)) { | |
488 | case TYPE_CODE_INT: | |
489 | case TYPE_CODE_CHAR: | |
490 | case TYPE_CODE_ENUM: | |
491 | case TYPE_CODE_FLT: | |
492 | case TYPE_CODE_RANGE: | |
493 | case TYPE_CODE_BOOL: | |
494 | return 1; | |
495 | ||
496 | default: | |
497 | return 0; | |
498 | } | |
499 | } | |
500 | ||
501 | /* Returns non-zero if its argument is of an ordered type. */ | |
502 | int | |
503 | ordered_type (type) | |
504 | struct type *type; | |
505 | { | |
506 | switch (TYPE_CODE (type)) { | |
507 | case TYPE_CODE_INT: | |
508 | case TYPE_CODE_CHAR: | |
509 | case TYPE_CODE_ENUM: | |
510 | case TYPE_CODE_FLT: | |
511 | case TYPE_CODE_RANGE: | |
512 | return 1; | |
513 | ||
514 | default: | |
515 | return 0; | |
516 | } | |
517 | } | |
518 | ||
519 | /* Returns non-zero if the two types are the same */ | |
520 | int | |
521 | same_type (arg1, arg2) | |
522 | struct type *arg1, *arg2; | |
523 | { | |
524 | if (structured_type(arg1) ? !structured_type(arg2) : structured_type(arg2)) | |
525 | /* One is structured and one isn't */ | |
526 | return 0; | |
527 | else if (structured_type(arg1) && structured_type(arg2)) | |
528 | return arg1 == arg2; | |
529 | else if (numeric_type(arg1) && numeric_type(arg2)) | |
530 | return (TYPE_CODE(arg2) == TYPE_CODE(arg1)) && | |
531 | (TYPE_UNSIGNED(arg1) == TYPE_UNSIGNED(arg2)) | |
532 | ? 1 : 0; | |
533 | else | |
534 | return arg1==arg2; | |
535 | } | |
536 | ||
537 | /* Returns non-zero if the type is integral */ | |
538 | int | |
539 | integral_type (type) | |
540 | struct type *type; | |
541 | { | |
542 | switch(current_language->la_language) | |
543 | { | |
544 | case language_c: | |
545af6ce | 545 | case language_cplus: |
c8023e66 JG |
546 | return (TYPE_CODE(type) != TYPE_CODE_INT) && |
547 | (TYPE_CODE(type) != TYPE_CODE_ENUM) ? 0 : 1; | |
548 | case language_m2: | |
549 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; | |
550 | default: | |
551 | error ("Language not supported."); | |
552 | } | |
553 | } | |
554 | ||
555 | /* Returns non-zero if the value is numeric */ | |
556 | int | |
557 | numeric_type (type) | |
558 | struct type *type; | |
559 | { | |
560 | switch (TYPE_CODE (type)) { | |
561 | case TYPE_CODE_INT: | |
562 | case TYPE_CODE_FLT: | |
563 | return 1; | |
564 | ||
565 | default: | |
566 | return 0; | |
567 | } | |
568 | } | |
569 | ||
570 | /* Returns non-zero if the value is a character type */ | |
571 | int | |
572 | character_type (type) | |
573 | struct type *type; | |
574 | { | |
575 | switch(current_language->la_language) | |
576 | { | |
577 | case language_m2: | |
578 | return TYPE_CODE(type) != TYPE_CODE_CHAR ? 0 : 1; | |
579 | ||
580 | case language_c: | |
545af6ce | 581 | case language_cplus: |
c8023e66 JG |
582 | return (TYPE_CODE(type) == TYPE_CODE_INT) && |
583 | TYPE_LENGTH(type) == sizeof(char) | |
584 | ? 1 : 0; | |
585 | } | |
586 | } | |
587 | ||
588 | /* Returns non-zero if the value is a boolean type */ | |
589 | int | |
590 | boolean_type (type) | |
591 | struct type *type; | |
592 | { | |
593 | switch(current_language->la_language) | |
594 | { | |
595 | case language_m2: | |
596 | return TYPE_CODE(type) != TYPE_CODE_BOOL ? 0 : 1; | |
597 | ||
598 | case language_c: | |
545af6ce | 599 | case language_cplus: |
c8023e66 JG |
600 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; |
601 | } | |
602 | } | |
603 | ||
604 | /* Returns non-zero if the value is a floating-point type */ | |
605 | int | |
606 | float_type (type) | |
607 | struct type *type; | |
608 | { | |
609 | return TYPE_CODE(type) == TYPE_CODE_FLT; | |
610 | } | |
611 | ||
612 | /* Returns non-zero if the value is a pointer type */ | |
613 | int | |
614 | pointer_type(type) | |
615 | struct type *type; | |
616 | { | |
617 | return TYPE_CODE(type) == TYPE_CODE_PTR || | |
618 | TYPE_CODE(type) == TYPE_CODE_REF; | |
619 | } | |
620 | ||
621 | /* Returns non-zero if the value is a structured type */ | |
622 | int | |
623 | structured_type(type) | |
624 | struct type *type; | |
625 | { | |
626 | switch(current_language->la_language) | |
627 | { | |
628 | case language_c: | |
545af6ce | 629 | case language_cplus: |
c8023e66 JG |
630 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || |
631 | (TYPE_CODE(type) == TYPE_CODE_UNION) || | |
632 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
633 | case language_m2: | |
634 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || | |
635 | (TYPE_CODE(type) == TYPE_CODE_SET) || | |
636 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
637 | } | |
638 | } | |
639 | \f | |
640 | /* This page contains functions that return info about | |
641 | (struct value) values used in GDB. */ | |
642 | ||
643 | /* Returns non-zero if the value VAL represents a true value. */ | |
644 | int | |
645 | value_true(val) | |
646 | value val; | |
647 | { | |
648 | int len, i; | |
649 | struct type *type; | |
650 | LONGEST v; | |
651 | ||
652 | switch (current_language->la_language) { | |
653 | ||
654 | case language_c: | |
545af6ce | 655 | case language_cplus: |
c8023e66 JG |
656 | return !value_zerop (val); |
657 | ||
658 | case language_m2: | |
659 | type = VALUE_TYPE(val); | |
660 | if (TYPE_CODE (type) != TYPE_CODE_BOOL) | |
661 | return 0; /* Not a BOOLEAN at all */ | |
662 | /* Search the fields for one that matches the current value. */ | |
663 | len = TYPE_NFIELDS (type); | |
664 | v = value_as_long (val); | |
665 | for (i = 0; i < len; i++) | |
666 | { | |
667 | QUIT; | |
668 | if (v == TYPE_FIELD_BITPOS (type, i)) | |
669 | break; | |
670 | } | |
671 | if (i >= len) | |
672 | return 0; /* Not a valid BOOLEAN value */ | |
673 | if (!strcmp ("TRUE", TYPE_FIELD_NAME(VALUE_TYPE(val), i))) | |
674 | return 1; /* BOOLEAN with value TRUE */ | |
675 | else | |
676 | return 0; /* BOOLEAN with value FALSE */ | |
677 | break; | |
678 | ||
679 | default: | |
680 | error ("Language not supported."); | |
681 | } | |
682 | } | |
683 | \f | |
684 | /* Returns non-zero if the operator OP is defined on | |
685 | the values ARG1 and ARG2. */ | |
686 | void | |
687 | binop_type_check(arg1,arg2,op) | |
688 | value arg1,arg2; | |
689 | int op; | |
690 | { | |
691 | struct type *t1, *t2; | |
692 | ||
693 | /* If we're not checking types, always return success. */ | |
694 | if (!STRICT_TYPE) | |
695 | return; | |
696 | ||
697 | t1=VALUE_TYPE(arg1); | |
698 | if (arg2!=(value)NULL) | |
699 | t2=VALUE_TYPE(arg2); | |
700 | else | |
701 | t2=NULL; | |
702 | ||
703 | switch(op) | |
704 | { | |
705 | case BINOP_ADD: | |
706 | case BINOP_SUB: | |
707 | if ((numeric_type(t1) && pointer_type(t2)) || | |
708 | (pointer_type(t1) && numeric_type(t2))) | |
709 | { | |
710 | printf("warning: combining pointer and integer.\n"); | |
711 | break; | |
712 | } | |
713 | case BINOP_MUL: | |
714 | case BINOP_LSH: | |
715 | case BINOP_RSH: | |
716 | if (!numeric_type(t1) || !numeric_type(t2)) | |
717 | type_op_error ("Arguments to %s must be numbers.",op); | |
718 | else if (!same_type(t1,t2)) | |
719 | type_op_error ("Arguments to %s must be of the same type.",op); | |
720 | break; | |
721 | ||
722 | case BINOP_AND: | |
723 | case BINOP_OR: | |
724 | if (!boolean_type(t1) || !boolean_type(t2)) | |
725 | type_op_error ("Arguments to %s must be of boolean type.",op); | |
726 | break; | |
727 | ||
728 | case BINOP_EQUAL: | |
729 | if ((pointer_type(t1) && !(pointer_type(t2) || integral_type(t2))) || | |
730 | (pointer_type(t2) && !(pointer_type(t1) || integral_type(t1)))) | |
731 | type_op_error ("A pointer can only be compared to an integer or pointer.",op); | |
732 | else if ((pointer_type(t1) && integral_type(t2)) || | |
733 | (integral_type(t1) && pointer_type(t2))) | |
734 | { | |
735 | printf("warning: combining integer and pointer.\n"); | |
736 | break; | |
737 | } | |
738 | else if (!simple_type(t1) || !simple_type(t2)) | |
739 | type_op_error ("Arguments to %s must be of simple type.",op); | |
740 | else if (!same_type(t1,t2)) | |
741 | type_op_error ("Arguments to %s must be of the same type.",op); | |
742 | break; | |
743 | ||
744 | case BINOP_REM: | |
745 | if (!integral_type(t1) || !integral_type(t2)) | |
746 | type_op_error ("Arguments to %s must be of integral type.",op); | |
747 | break; | |
748 | ||
749 | case BINOP_LESS: | |
750 | case BINOP_GTR: | |
751 | case BINOP_LEQ: | |
752 | case BINOP_GEQ: | |
753 | if (!ordered_type(t1) || !ordered_type(t2)) | |
754 | type_op_error ("Arguments to %s must be of ordered type.",op); | |
755 | else if (!same_type(t1,t2)) | |
756 | type_op_error ("Arguments to %s must be of the same type.",op); | |
757 | break; | |
758 | ||
759 | case BINOP_ASSIGN: | |
760 | if (pointer_type(t1) && !integral_type(t2)) | |
761 | type_op_error ("A pointer can only be assigned an integer.",op); | |
762 | else if (pointer_type(t1) && integral_type(t2)) | |
763 | { | |
764 | printf("warning: combining integer and pointer."); | |
765 | break; | |
766 | } | |
767 | else if (!simple_type(t1) || !simple_type(t2)) | |
768 | type_op_error ("Arguments to %s must be of simple type.",op); | |
769 | else if (!same_type(t1,t2)) | |
770 | type_op_error ("Arguments to %s must be of the same type.",op); | |
771 | break; | |
772 | ||
773 | /* Unary checks -- arg2 is null */ | |
774 | ||
775 | case UNOP_ZEROP: | |
776 | if (!boolean_type(t1)) | |
777 | type_op_error ("Argument to %s must be of boolean type.",op); | |
778 | break; | |
779 | ||
780 | case UNOP_PLUS: | |
781 | case UNOP_NEG: | |
782 | if (!numeric_type(t1)) | |
783 | type_op_error ("Argument to %s must be of numeric type.",op); | |
784 | break; | |
785 | ||
786 | case UNOP_IND: | |
787 | if (integral_type(t1)) | |
788 | { | |
789 | printf("warning: combining pointer and integer.\n"); | |
790 | break; | |
791 | } | |
792 | else if (!pointer_type(t1)) | |
793 | type_op_error ("Argument to %s must be a pointer.",op); | |
794 | break; | |
795 | ||
796 | case UNOP_PREINCREMENT: | |
797 | case UNOP_POSTINCREMENT: | |
798 | case UNOP_PREDECREMENT: | |
799 | case UNOP_POSTDECREMENT: | |
800 | if (!ordered_type(t1)) | |
801 | type_op_error ("Argument to %s must be of an ordered type.",op); | |
802 | break; | |
803 | ||
804 | default: | |
805 | /* Ok. The following operators have different meanings in | |
806 | different languages. */ | |
807 | switch(current_language->la_language) | |
808 | { | |
809 | #ifdef _LANG_c | |
810 | case language_c: | |
545af6ce | 811 | case language_cplus: |
c8023e66 JG |
812 | switch(op) |
813 | { | |
814 | case BINOP_DIV: | |
815 | if (!numeric_type(t1) || !numeric_type(t2)) | |
816 | type_op_error ("Arguments to %s must be numbers.",op); | |
817 | break; | |
818 | } | |
819 | break; | |
820 | #endif | |
821 | ||
822 | #ifdef _LANG_m2 | |
823 | case language_m2: | |
824 | switch(op) | |
825 | { | |
826 | case BINOP_DIV: | |
827 | if (!float_type(t1) || !float_type(t2)) | |
828 | type_op_error ("Arguments to %s must be floating point numbers.",op); | |
829 | break; | |
830 | case BINOP_INTDIV: | |
831 | if (!integral_type(t1) || !integral_type(t2)) | |
832 | type_op_error ("Arguments to %s must be of integral type.",op); | |
833 | break; | |
834 | } | |
835 | #endif | |
836 | } | |
837 | } | |
838 | } | |
839 | \f | |
840 | /* This page contains functions for the printing out of | |
841 | error messages that occur during type- and range- | |
842 | checking. */ | |
843 | ||
844 | /* Prints the format string FMT with the operator as a string | |
845 | corresponding to the opcode OP. If FATAL is non-zero, then | |
846 | this is an error and error () is called. Otherwise, it is | |
847 | a warning and printf() is called. */ | |
848 | void | |
849 | op_error (fmt,op,fatal) | |
850 | char *fmt; | |
851 | enum exp_opcode op; | |
852 | int fatal; | |
853 | { | |
854 | if (fatal) | |
855 | error (fmt,op_string(op)); | |
856 | else | |
857 | { | |
858 | printf("warning: "); | |
859 | printf(fmt,op_string(op)); | |
860 | printf("\n"); | |
861 | } | |
862 | } | |
863 | ||
864 | /* These are called when a language fails a type- or range-check. | |
865 | The first argument should be a printf()-style format string, and | |
866 | the rest of the arguments should be its arguments. If | |
867 | [type|range]_check is [type|range]_check_on, then return_to_top_level() | |
868 | is called in the style of error (). Otherwise, the message is prefixed | |
869 | by "warning: " and we do not return to the top level. */ | |
870 | void | |
871 | type_error (va_alist) | |
872 | va_dcl | |
873 | { | |
874 | va_list args; | |
875 | char *string; | |
876 | ||
877 | if (type_check==type_check_warn) | |
878 | fprintf(stderr,"warning: "); | |
879 | else | |
880 | target_terminal_ours(); | |
881 | ||
882 | va_start (args); | |
883 | string = va_arg (args, char *); | |
884 | vfprintf (stderr, string, args); | |
885 | fprintf (stderr, "\n"); | |
886 | va_end (args); | |
887 | if (type_check==type_check_on) | |
888 | return_to_top_level(); | |
889 | } | |
890 | ||
891 | void | |
892 | range_error (va_alist) | |
893 | va_dcl | |
894 | { | |
895 | va_list args; | |
896 | char *string; | |
897 | ||
898 | if (range_check==range_check_warn) | |
899 | fprintf(stderr,"warning: "); | |
900 | else | |
901 | target_terminal_ours(); | |
902 | ||
903 | va_start (args); | |
904 | string = va_arg (args, char *); | |
905 | vfprintf (stderr, string, args); | |
906 | fprintf (stderr, "\n"); | |
907 | va_end (args); | |
908 | if (range_check==range_check_on) | |
909 | return_to_top_level(); | |
910 | } | |
911 | ||
912 | \f | |
913 | /* This page contains miscellaneous functions */ | |
914 | ||
915 | /* Return the language as a string */ | |
916 | char * | |
917 | language_str(lang) | |
918 | enum language lang; | |
919 | { | |
920 | int i; | |
921 | ||
922 | for (i = 0; i < languages_size; i++) { | |
923 | if (languages[i]->la_language == lang) { | |
924 | return languages[i]->la_name; | |
925 | } | |
926 | } | |
927 | return "Unknown"; | |
928 | } | |
929 | ||
930 | struct cmd_list_element *setchecklist = NULL; | |
931 | struct cmd_list_element *showchecklist = NULL; | |
932 | ||
933 | static void | |
d8ce1326 JG |
934 | set_check (ignore, from_tty) |
935 | char *ignore; | |
c8023e66 JG |
936 | int from_tty; |
937 | { | |
938 | printf( | |
939 | "\"set check\" must be followed by the name of a check subcommand.\n"); | |
940 | help_list(setchecklist, "set check ", -1, stdout); | |
941 | } | |
942 | ||
943 | static void | |
944 | show_check (arg, from_tty) | |
945 | char *arg; | |
946 | int from_tty; | |
947 | { | |
948 | cmd_show_list(showchecklist, from_tty, ""); | |
949 | } | |
950 | \f | |
951 | /* Add a language to the set of known languages. */ | |
952 | ||
953 | void | |
954 | add_language (lang) | |
955 | struct language_defn *lang; | |
956 | { | |
957 | if (lang->la_magic != LANG_MAGIC) | |
958 | { | |
959 | fprintf(stderr, "Magic number of %s language struct wrong\n", | |
960 | lang->la_name); | |
961 | abort(); | |
962 | } | |
963 | ||
964 | if (!languages) | |
965 | { | |
966 | languages_allocsize = DEFAULT_ALLOCSIZE; | |
967 | languages = (struct language_defn **) xmalloc | |
968 | (languages_allocsize * sizeof (*languages)); | |
969 | } | |
970 | if (languages_size >= languages_allocsize) | |
971 | { | |
972 | languages_allocsize *= 2; | |
973 | languages = (struct language_defn **) xrealloc (languages, | |
974 | languages_allocsize * sizeof (*languages)); | |
975 | } | |
976 | languages[languages_size++] = lang; | |
c8023e66 JG |
977 | } |
978 | ||
979 | /* Define the language that is no language. */ | |
980 | ||
981 | int | |
982 | unk_lang_parser () | |
983 | { | |
984 | return 1; | |
985 | } | |
986 | ||
987 | void | |
988 | unk_lang_error () | |
989 | { | |
990 | error ("Attempted to parse an expression with unknown language"); | |
991 | } | |
992 | ||
993 | static struct type ** const (unknown_builtin_types[]) = { 0 }; | |
994 | static const struct op_print unk_op_print_tab[] = { 0 }; | |
995 | ||
996 | const struct language_defn unknown_language_defn = { | |
997 | "unknown", | |
998 | language_unknown, | |
999 | &unknown_builtin_types[0], | |
1000 | range_check_off, | |
1001 | type_check_off, | |
1002 | unk_lang_parser, | |
1003 | unk_lang_error, | |
1004 | &builtin_type_error, /* longest signed integral type */ | |
1005 | &builtin_type_error, /* longest unsigned integral type */ | |
1006 | &builtin_type_error, /* longest floating point type */ | |
1007 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1008 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1009 | unk_op_print_tab, /* expression operators for printing */ | |
1010 | LANG_MAGIC | |
1011 | }; | |
1012 | ||
1013 | /* These two structs define fake entries for the "local" and "auto" options. */ | |
1014 | const struct language_defn auto_language_defn = { | |
1015 | "auto", | |
1016 | language_auto, | |
1017 | &unknown_builtin_types[0], | |
1018 | range_check_off, | |
1019 | type_check_off, | |
1020 | unk_lang_parser, | |
1021 | unk_lang_error, | |
1022 | &builtin_type_error, /* longest signed integral type */ | |
1023 | &builtin_type_error, /* longest unsigned integral type */ | |
1024 | &builtin_type_error, /* longest floating point type */ | |
1025 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1026 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1027 | unk_op_print_tab, /* expression operators for printing */ | |
1028 | LANG_MAGIC | |
1029 | }; | |
1030 | ||
1031 | const struct language_defn local_language_defn = { | |
1032 | "local", | |
1033 | language_auto, | |
1034 | &unknown_builtin_types[0], | |
1035 | range_check_off, | |
1036 | type_check_off, | |
1037 | unk_lang_parser, | |
1038 | unk_lang_error, | |
1039 | &builtin_type_error, /* longest signed integral type */ | |
1040 | &builtin_type_error, /* longest unsigned integral type */ | |
1041 | &builtin_type_error, /* longest floating point type */ | |
1042 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1043 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1044 | unk_op_print_tab, /* expression operators for printing */ | |
1045 | LANG_MAGIC | |
1046 | }; | |
1047 | \f | |
1048 | /* Initialize the language routines */ | |
1049 | ||
1050 | void | |
1051 | _initialize_language() | |
1052 | { | |
1053 | struct cmd_list_element *set, *show; | |
1054 | ||
1055 | /* GDB commands for language specific stuff */ | |
1056 | ||
1057 | set = add_set_cmd ("language", class_support, var_string_noescape, | |
1058 | (char *)&language, | |
0b798409 | 1059 | "Set the current source language.", |
c8023e66 JG |
1060 | &setlist); |
1061 | show = add_show_from_set (set, &showlist); | |
1062 | set->function = set_language_command; | |
1063 | show->function = show_language_command; | |
1064 | ||
1065 | add_prefix_cmd ("check", no_class, set_check, | |
1066 | "Set the status of the type/range checker", | |
1067 | &setchecklist, "set check ", 0, &setlist); | |
1068 | add_alias_cmd ("c", "check", no_class, 1, &setlist); | |
1069 | add_alias_cmd ("ch", "check", no_class, 1, &setlist); | |
1070 | ||
1071 | add_prefix_cmd ("check", no_class, show_check, | |
1072 | "Show the status of the type/range checker", | |
7cb83757 | 1073 | &showchecklist, "show check ", 0, &showlist); |
c8023e66 JG |
1074 | add_alias_cmd ("c", "check", no_class, 1, &showlist); |
1075 | add_alias_cmd ("ch", "check", no_class, 1, &showlist); | |
1076 | ||
1077 | set = add_set_cmd ("type", class_support, var_string_noescape, | |
1078 | (char *)&type, | |
7cb83757 | 1079 | "Set type checking. (on/warn/off/auto)", |
c8023e66 JG |
1080 | &setchecklist); |
1081 | show = add_show_from_set (set, &showchecklist); | |
1082 | set->function = set_type_command; | |
1083 | show->function = show_type_command; | |
1084 | ||
1085 | set = add_set_cmd ("range", class_support, var_string_noescape, | |
1086 | (char *)&range, | |
7cb83757 | 1087 | "Set range checking. (on/warn/off/auto)", |
c8023e66 JG |
1088 | &setchecklist); |
1089 | show = add_show_from_set (set, &showchecklist); | |
1090 | set->function = set_range_command; | |
1091 | show->function = show_range_command; | |
1092 | ||
1093 | add_language (&unknown_language_defn); | |
1094 | add_language (&local_language_defn); | |
1095 | add_language (&auto_language_defn); | |
1096 | ||
1097 | language = savestring ("auto",strlen("auto")); | |
1098 | range = savestring ("auto",strlen("auto")); | |
1099 | type = savestring ("auto",strlen("auto")); | |
1100 | ||
1101 | /* Have the above take effect */ | |
1102 | ||
5f3d478e | 1103 | set_language_command (language, 0); |
c8023e66 JG |
1104 | set_type_command (NULL, 0); |
1105 | set_range_command (NULL, 0); | |
1106 | } |