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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 | ||
44 | /* Forward function declarations */ | |
45 | static void set_type_range (); | |
46 | ||
47 | /* Forward declaration */ | |
48 | extern struct language_defn unknown_language_defn; | |
49 | ||
50 | /* The current (default at startup) state of type and range checking. | |
51 | (If the modes are set to "auto", though, these are changed based | |
52 | on the default language at startup, and then again based on the | |
53 | language of the first source file. */ | |
54 | ||
55 | enum range_mode range_mode = range_mode_auto; | |
56 | enum range_check range_check = range_check_off; | |
57 | enum type_mode type_mode = type_mode_auto; | |
58 | enum type_check type_check = type_check_off; | |
59 | ||
60 | /* The current language and language_mode (see language.h) */ | |
61 | ||
62 | struct language_defn *current_language = &unknown_language_defn; | |
63 | enum language_mode language_mode = language_mode_auto; | |
64 | ||
65 | /* The list of supported languages. The list itself is malloc'd. */ | |
66 | ||
67 | static struct language_defn **languages; | |
68 | static unsigned languages_size; | |
69 | static unsigned languages_allocsize; | |
70 | #define DEFAULT_ALLOCSIZE 3 | |
71 | ||
72 | /* The "set language/type/range" commands all put stuff in these | |
73 | buffers. This is to make them work as set/show commands. The | |
74 | user's string is copied here, then the set_* commands look at | |
75 | them and update them to something that looks nice when it is | |
76 | printed out. */ | |
77 | ||
78 | static char *language; | |
79 | static char *type; | |
80 | static char *range; | |
81 | ||
82 | /* Warning issued when current_language and the language of the current | |
83 | frame do not match. */ | |
84 | char lang_frame_mismatch_warn[] = | |
85 | "Warning: the current language does not match this frame."; | |
86 | ||
87 | void set_lang_str(); | |
88 | void set_type_str(); | |
89 | void set_range_str(); | |
90 | \f | |
91 | /* This page contains the functions corresponding to GDB commands | |
92 | and their helpers. */ | |
93 | ||
94 | /* Show command. Display a warning if the language set | |
95 | does not match the frame. */ | |
96 | void | |
d8ce1326 JG |
97 | show_language_command (ignore, from_tty) |
98 | char *ignore; | |
c8023e66 JG |
99 | int from_tty; |
100 | { | |
101 | enum language flang; /* The language of the current frame */ | |
102 | ||
103 | flang = get_frame_language(); | |
104 | if (flang != language_unknown && | |
105 | language_mode == language_mode_manual && | |
106 | current_language->la_language != flang) | |
107 | printf_filtered("%s\n",lang_frame_mismatch_warn); | |
108 | } | |
109 | ||
110 | /* Set command. Change the current working language. */ | |
111 | void | |
d8ce1326 JG |
112 | set_language_command (ignore, from_tty) |
113 | char *ignore; | |
c8023e66 JG |
114 | int from_tty; |
115 | { | |
116 | int i; | |
117 | enum language flang; | |
5f3d478e | 118 | char *err_lang; |
c8023e66 JG |
119 | |
120 | /* FIXME -- do this from the list, with HELP. */ | |
121 | if (!language || !language[0]) { | |
122 | printf("The currently understood settings are:\n\n\ | |
123 | local or auto Automatic setting based on source file\n\ | |
0b798409 | 124 | c Use the C language\n\ |
545af6ce | 125 | c++ Use the C++ language\n\ |
0b798409 JG |
126 | modula-2 Use the Modula-2 language\n"); |
127 | /* Restore the silly string. */ | |
128 | set_language(current_language->la_language); | |
c8023e66 JG |
129 | return; |
130 | } | |
131 | ||
132 | /* Search the list of languages for a match. */ | |
133 | for (i = 0; i < languages_size; i++) { | |
134 | if (!strcmp (languages[i]->la_name, language)) { | |
135 | /* Found it! Go into manual mode, and use this language. */ | |
136 | if (languages[i]->la_language == language_auto) { | |
137 | /* Enter auto mode. Set to the current frame's language, if known. */ | |
138 | language_mode = language_mode_auto; | |
139 | flang = get_frame_language(); | |
140 | if (flang!=language_unknown) | |
141 | set_language(flang); | |
142 | return; | |
143 | } else { | |
144 | /* Enter manual mode. Set the specified language. */ | |
145 | language_mode = language_mode_manual; | |
146 | current_language = languages[i]; | |
147 | set_type_range (); | |
148 | set_lang_str(); | |
149 | return; | |
150 | } | |
151 | } | |
152 | } | |
153 | ||
5f3d478e JG |
154 | /* Reset the language (esp. the global string "language") to the |
155 | correct values. */ | |
156 | err_lang=savestring(language,strlen(language)); | |
157 | make_cleanup (free, err_lang); /* Free it after error */ | |
158 | set_language(current_language->la_language); | |
159 | error ("Unknown language `%s'.",err_lang); | |
c8023e66 JG |
160 | } |
161 | ||
162 | /* Show command. Display a warning if the type setting does | |
163 | not match the current language. */ | |
164 | void | |
d8ce1326 JG |
165 | show_type_command(ignore, from_tty) |
166 | char *ignore; | |
c8023e66 JG |
167 | int from_tty; |
168 | { | |
169 | if (type_check != current_language->la_type_check) | |
170 | printf( | |
171 | "Warning: the current type check setting does not match the language.\n"); | |
172 | } | |
173 | ||
174 | /* Set command. Change the setting for type checking. */ | |
175 | void | |
d8ce1326 JG |
176 | set_type_command(ignore, from_tty) |
177 | char *ignore; | |
c8023e66 JG |
178 | int from_tty; |
179 | { | |
180 | if (!strcmp(type,"on")) | |
181 | { | |
182 | type_check = type_check_on; | |
183 | type_mode = type_mode_manual; | |
184 | } | |
185 | else if (!strcmp(type,"warn")) | |
186 | { | |
187 | type_check = type_check_warn; | |
188 | type_mode = type_mode_manual; | |
189 | } | |
190 | else if (!strcmp(type,"off")) | |
191 | { | |
192 | type_check = type_check_off; | |
193 | type_mode = type_mode_manual; | |
194 | } | |
195 | else if (!strcmp(type,"auto")) | |
196 | { | |
197 | type_mode = type_mode_auto; | |
198 | set_type_range(); | |
199 | /* Avoid hitting the set_type_str call below. We | |
200 | did it in set_type_range. */ | |
201 | return; | |
202 | } | |
203 | set_type_str(); | |
d8ce1326 | 204 | show_type_command((char *)NULL, from_tty); |
c8023e66 JG |
205 | } |
206 | ||
207 | /* Show command. Display a warning if the range setting does | |
208 | not match the current language. */ | |
209 | void | |
d8ce1326 JG |
210 | show_range_command(ignore, from_tty) |
211 | char *ignore; | |
c8023e66 JG |
212 | int from_tty; |
213 | { | |
214 | ||
215 | if (range_check != current_language->la_range_check) | |
216 | printf( | |
217 | "Warning: the current range check setting does not match the language.\n"); | |
218 | } | |
219 | ||
220 | /* Set command. Change the setting for range checking. */ | |
221 | void | |
d8ce1326 JG |
222 | set_range_command(ignore, from_tty) |
223 | char *ignore; | |
c8023e66 JG |
224 | int from_tty; |
225 | { | |
226 | if (!strcmp(range,"on")) | |
227 | { | |
228 | range_check = range_check_on; | |
229 | range_mode = range_mode_manual; | |
230 | } | |
231 | else if (!strcmp(range,"warn")) | |
232 | { | |
233 | range_check = range_check_warn; | |
234 | range_mode = range_mode_manual; | |
235 | } | |
236 | else if (!strcmp(range,"off")) | |
237 | { | |
238 | range_check = range_check_off; | |
239 | range_mode = range_mode_manual; | |
240 | } | |
241 | else if (!strcmp(range,"auto")) | |
242 | { | |
243 | range_mode = range_mode_auto; | |
244 | set_type_range(); | |
245 | /* Avoid hitting the set_range_str call below. We | |
246 | did it in set_type_range. */ | |
247 | return; | |
248 | } | |
249 | set_range_str(); | |
d8ce1326 | 250 | show_range_command((char *)0, from_tty); |
c8023e66 JG |
251 | } |
252 | ||
253 | /* Set the status of range and type checking based on | |
254 | the current modes and the current language. | |
255 | If SHOW is non-zero, then print out the current language, | |
256 | type and range checking status. */ | |
257 | static void | |
258 | set_type_range() | |
259 | { | |
c8023e66 JG |
260 | |
261 | if (range_mode == range_mode_auto) | |
262 | range_check = current_language->la_range_check; | |
263 | ||
264 | if (type_mode == type_mode_auto) | |
265 | type_check = current_language->la_type_check; | |
266 | ||
267 | set_type_str(); | |
268 | set_range_str(); | |
269 | } | |
270 | ||
271 | /* Set current language to (enum language) LANG. */ | |
272 | ||
273 | void | |
274 | set_language(lang) | |
275 | enum language lang; | |
276 | { | |
277 | int i; | |
278 | ||
279 | for (i = 0; i < languages_size; i++) { | |
280 | if (languages[i]->la_language == lang) { | |
281 | current_language = languages[i]; | |
282 | set_type_range (); | |
283 | set_lang_str(); | |
545af6ce | 284 | break; |
c8023e66 JG |
285 | } |
286 | } | |
287 | } | |
288 | \f | |
289 | /* This page contains functions that update the global vars | |
290 | language, type and range. */ | |
291 | void | |
292 | set_lang_str() | |
293 | { | |
d8ce1326 | 294 | char *prefix = ""; |
c8023e66 JG |
295 | |
296 | free (language); | |
297 | if (language_mode == language_mode_auto) | |
298 | prefix = "auto; currently "; | |
299 | ||
300 | language = concat(prefix, current_language->la_name, ""); | |
301 | } | |
302 | ||
303 | void | |
304 | set_type_str() | |
305 | { | |
306 | char *tmp, *prefix = ""; | |
307 | ||
308 | free (type); | |
309 | if (type_mode==type_mode_auto) | |
310 | prefix = "auto; currently "; | |
311 | ||
312 | switch(type_check) | |
313 | { | |
314 | case type_check_on: | |
315 | tmp = "on"; | |
316 | break; | |
317 | case type_check_off: | |
318 | tmp = "off"; | |
319 | break; | |
320 | case type_check_warn: | |
321 | tmp = "warn"; | |
322 | break; | |
323 | default: | |
324 | error ("Unrecognized type check setting."); | |
325 | } | |
326 | ||
327 | type = concat(prefix,tmp,""); | |
328 | } | |
329 | ||
330 | void | |
331 | set_range_str() | |
332 | { | |
333 | char *tmp, *pref = ""; | |
334 | ||
335 | free (range); | |
336 | if (range_mode==range_mode_auto) | |
337 | pref = "auto; currently "; | |
338 | ||
339 | switch(range_check) | |
340 | { | |
341 | case range_check_on: | |
342 | tmp = "on"; | |
343 | break; | |
344 | case range_check_off: | |
345 | tmp = "off"; | |
346 | break; | |
347 | case range_check_warn: | |
348 | tmp = "warn"; | |
349 | break; | |
350 | default: | |
351 | error ("Unrecognized range check setting."); | |
352 | } | |
353 | ||
354 | range = concat(pref,tmp,""); | |
355 | } | |
356 | ||
357 | ||
358 | /* Print out the current language settings: language, range and | |
359 | type checking. */ | |
360 | void | |
361 | language_info () | |
362 | { | |
363 | printf("Current Language: %s\n",language); | |
d8ce1326 | 364 | show_language_command((char *)0, 1); |
c8023e66 | 365 | printf("Type checking: %s\n",type); |
d8ce1326 | 366 | show_type_command((char *)0, 1); |
c8023e66 | 367 | printf("Range checking: %s\n",range); |
d8ce1326 | 368 | show_range_command((char *)0, 1); |
c8023e66 JG |
369 | } |
370 | \f | |
371 | /* Return the result of a binary operation. */ | |
372 | struct type * | |
373 | binop_result_type(v1,v2) | |
374 | value v1,v2; | |
375 | { | |
376 | int l1,l2,size,uns; | |
377 | ||
d8ce1326 JG |
378 | l1 = TYPE_LENGTH(VALUE_TYPE(v1)); |
379 | l2 = TYPE_LENGTH(VALUE_TYPE(v2)); | |
c8023e66 JG |
380 | |
381 | switch(current_language->la_language) | |
382 | { | |
383 | case language_c: | |
545af6ce | 384 | case language_cplus: |
c8023e66 JG |
385 | if (TYPE_CODE(VALUE_TYPE(v1))==TYPE_CODE_FLT) |
386 | return TYPE_CODE(VALUE_TYPE(v2)) == TYPE_CODE_FLT && l2 > l1 ? | |
387 | VALUE_TYPE(v2) : VALUE_TYPE(v1); | |
388 | else if (TYPE_CODE(VALUE_TYPE(v2))==TYPE_CODE_FLT) | |
389 | return TYPE_CODE(VALUE_TYPE(v1)) == TYPE_CODE_FLT && l1 > l2 ? | |
390 | VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
391 | else if (TYPE_UNSIGNED(VALUE_TYPE(v1)) && l1 > l2) | |
392 | return VALUE_TYPE(v1); | |
393 | else if (TYPE_UNSIGNED(VALUE_TYPE(v2)) && l2 > l1) | |
394 | return VALUE_TYPE(v2); | |
395 | else /* Both are signed. Result is the longer type */ | |
396 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
397 | break; | |
398 | case language_m2: | |
399 | /* If we are doing type-checking, l1 should equal l2, so this is | |
400 | not needed. */ | |
401 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
402 | break; | |
403 | } | |
d8ce1326 JG |
404 | abort(); |
405 | return (struct type *)0; /* For lint */ | |
c8023e66 JG |
406 | } |
407 | \f | |
408 | /* This page contains functions that return format strings for | |
409 | printf for printing out numbers in different formats */ | |
410 | ||
411 | /* Returns the appropriate printf format for hexadecimal | |
412 | numbers. */ | |
413 | char * | |
414 | local_hex_format_custom(pre) | |
415 | char *pre; | |
416 | { | |
417 | static char form[50]; | |
418 | ||
419 | strcpy (form, current_language->la_hex_format_pre); | |
420 | strcat (form, pre); | |
421 | strcat (form, current_language->la_hex_format_suf); | |
422 | return form; | |
423 | } | |
424 | ||
425 | /* Converts a number to hexadecimal and stores it in a static | |
426 | string. Returns a pointer to this string. */ | |
427 | char * | |
428 | local_hex_string (num) | |
429 | int num; | |
430 | { | |
431 | static char res[50]; | |
432 | ||
433 | sprintf (res, current_language->la_hex_format, num); | |
434 | return res; | |
435 | } | |
436 | ||
437 | /* Converts a number to custom hexadecimal and stores it in a static | |
438 | string. Returns a pointer to this string. */ | |
439 | char * | |
440 | local_hex_string_custom(num,pre) | |
441 | int num; | |
442 | char *pre; | |
443 | { | |
444 | static char res[50]; | |
445 | ||
446 | sprintf (res, local_hex_format_custom(pre), num); | |
447 | return res; | |
448 | } | |
449 | ||
450 | /* Returns the appropriate printf format for octal | |
451 | numbers. */ | |
452 | char * | |
453 | local_octal_format_custom(pre) | |
454 | char *pre; | |
455 | { | |
456 | static char form[50]; | |
457 | ||
458 | strcpy (form, current_language->la_octal_format_pre); | |
459 | strcat (form, pre); | |
460 | strcat (form, current_language->la_octal_format_suf); | |
461 | return form; | |
462 | } | |
463 | \f | |
464 | /* This page contains functions that are used in type/range checking. | |
465 | They all return zero if the type/range check fails. | |
466 | ||
467 | It is hoped that these will make extending GDB to parse different | |
468 | languages a little easier. These are primarily used in eval.c when | |
469 | evaluating expressions and making sure that their types are correct. | |
470 | Instead of having a mess of conjucted/disjuncted expressions in an "if", | |
471 | the ideas of type can be wrapped up in the following functions. | |
472 | ||
473 | Note that some of them are not currently dependent upon which language | |
474 | is currently being parsed. For example, floats are the same in | |
475 | C and Modula-2 (ie. the only floating point type has TYPE_CODE of | |
476 | TYPE_CODE_FLT), while booleans are different. */ | |
477 | ||
478 | /* Returns non-zero if its argument is a simple type. This is the same for | |
479 | both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur, | |
480 | and thus will never cause the failure of the test. */ | |
481 | int | |
482 | simple_type(type) | |
483 | struct type *type; | |
484 | { | |
485 | switch (TYPE_CODE (type)) { | |
486 | case TYPE_CODE_INT: | |
487 | case TYPE_CODE_CHAR: | |
488 | case TYPE_CODE_ENUM: | |
489 | case TYPE_CODE_FLT: | |
490 | case TYPE_CODE_RANGE: | |
491 | case TYPE_CODE_BOOL: | |
492 | return 1; | |
493 | ||
494 | default: | |
495 | return 0; | |
496 | } | |
497 | } | |
498 | ||
499 | /* Returns non-zero if its argument is of an ordered type. */ | |
500 | int | |
501 | ordered_type (type) | |
502 | struct type *type; | |
503 | { | |
504 | switch (TYPE_CODE (type)) { | |
505 | case TYPE_CODE_INT: | |
506 | case TYPE_CODE_CHAR: | |
507 | case TYPE_CODE_ENUM: | |
508 | case TYPE_CODE_FLT: | |
509 | case TYPE_CODE_RANGE: | |
510 | return 1; | |
511 | ||
512 | default: | |
513 | return 0; | |
514 | } | |
515 | } | |
516 | ||
517 | /* Returns non-zero if the two types are the same */ | |
518 | int | |
519 | same_type (arg1, arg2) | |
520 | struct type *arg1, *arg2; | |
521 | { | |
522 | if (structured_type(arg1) ? !structured_type(arg2) : structured_type(arg2)) | |
523 | /* One is structured and one isn't */ | |
524 | return 0; | |
525 | else if (structured_type(arg1) && structured_type(arg2)) | |
526 | return arg1 == arg2; | |
527 | else if (numeric_type(arg1) && numeric_type(arg2)) | |
528 | return (TYPE_CODE(arg2) == TYPE_CODE(arg1)) && | |
529 | (TYPE_UNSIGNED(arg1) == TYPE_UNSIGNED(arg2)) | |
530 | ? 1 : 0; | |
531 | else | |
532 | return arg1==arg2; | |
533 | } | |
534 | ||
535 | /* Returns non-zero if the type is integral */ | |
536 | int | |
537 | integral_type (type) | |
538 | struct type *type; | |
539 | { | |
540 | switch(current_language->la_language) | |
541 | { | |
542 | case language_c: | |
545af6ce | 543 | case language_cplus: |
c8023e66 JG |
544 | return (TYPE_CODE(type) != TYPE_CODE_INT) && |
545 | (TYPE_CODE(type) != TYPE_CODE_ENUM) ? 0 : 1; | |
546 | case language_m2: | |
547 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; | |
548 | default: | |
549 | error ("Language not supported."); | |
550 | } | |
551 | } | |
552 | ||
553 | /* Returns non-zero if the value is numeric */ | |
554 | int | |
555 | numeric_type (type) | |
556 | struct type *type; | |
557 | { | |
558 | switch (TYPE_CODE (type)) { | |
559 | case TYPE_CODE_INT: | |
560 | case TYPE_CODE_FLT: | |
561 | return 1; | |
562 | ||
563 | default: | |
564 | return 0; | |
565 | } | |
566 | } | |
567 | ||
568 | /* Returns non-zero if the value is a character type */ | |
569 | int | |
570 | character_type (type) | |
571 | struct type *type; | |
572 | { | |
573 | switch(current_language->la_language) | |
574 | { | |
575 | case language_m2: | |
576 | return TYPE_CODE(type) != TYPE_CODE_CHAR ? 0 : 1; | |
577 | ||
578 | case language_c: | |
545af6ce | 579 | case language_cplus: |
c8023e66 JG |
580 | return (TYPE_CODE(type) == TYPE_CODE_INT) && |
581 | TYPE_LENGTH(type) == sizeof(char) | |
582 | ? 1 : 0; | |
583 | } | |
584 | } | |
585 | ||
586 | /* Returns non-zero if the value is a boolean type */ | |
587 | int | |
588 | boolean_type (type) | |
589 | struct type *type; | |
590 | { | |
591 | switch(current_language->la_language) | |
592 | { | |
593 | case language_m2: | |
594 | return TYPE_CODE(type) != TYPE_CODE_BOOL ? 0 : 1; | |
595 | ||
596 | case language_c: | |
545af6ce | 597 | case language_cplus: |
c8023e66 JG |
598 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; |
599 | } | |
600 | } | |
601 | ||
602 | /* Returns non-zero if the value is a floating-point type */ | |
603 | int | |
604 | float_type (type) | |
605 | struct type *type; | |
606 | { | |
607 | return TYPE_CODE(type) == TYPE_CODE_FLT; | |
608 | } | |
609 | ||
610 | /* Returns non-zero if the value is a pointer type */ | |
611 | int | |
612 | pointer_type(type) | |
613 | struct type *type; | |
614 | { | |
615 | return TYPE_CODE(type) == TYPE_CODE_PTR || | |
616 | TYPE_CODE(type) == TYPE_CODE_REF; | |
617 | } | |
618 | ||
619 | /* Returns non-zero if the value is a structured type */ | |
620 | int | |
621 | structured_type(type) | |
622 | struct type *type; | |
623 | { | |
624 | switch(current_language->la_language) | |
625 | { | |
626 | case language_c: | |
545af6ce | 627 | case language_cplus: |
c8023e66 JG |
628 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || |
629 | (TYPE_CODE(type) == TYPE_CODE_UNION) || | |
630 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
631 | case language_m2: | |
632 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || | |
633 | (TYPE_CODE(type) == TYPE_CODE_SET) || | |
634 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
635 | } | |
636 | } | |
637 | \f | |
638 | /* This page contains functions that return info about | |
639 | (struct value) values used in GDB. */ | |
640 | ||
641 | /* Returns non-zero if the value VAL represents a true value. */ | |
642 | int | |
643 | value_true(val) | |
644 | value val; | |
645 | { | |
646 | int len, i; | |
647 | struct type *type; | |
648 | LONGEST v; | |
649 | ||
650 | switch (current_language->la_language) { | |
651 | ||
652 | case language_c: | |
545af6ce | 653 | case language_cplus: |
c8023e66 JG |
654 | return !value_zerop (val); |
655 | ||
656 | case language_m2: | |
657 | type = VALUE_TYPE(val); | |
658 | if (TYPE_CODE (type) != TYPE_CODE_BOOL) | |
659 | return 0; /* Not a BOOLEAN at all */ | |
660 | /* Search the fields for one that matches the current value. */ | |
661 | len = TYPE_NFIELDS (type); | |
662 | v = value_as_long (val); | |
663 | for (i = 0; i < len; i++) | |
664 | { | |
665 | QUIT; | |
666 | if (v == TYPE_FIELD_BITPOS (type, i)) | |
667 | break; | |
668 | } | |
669 | if (i >= len) | |
670 | return 0; /* Not a valid BOOLEAN value */ | |
671 | if (!strcmp ("TRUE", TYPE_FIELD_NAME(VALUE_TYPE(val), i))) | |
672 | return 1; /* BOOLEAN with value TRUE */ | |
673 | else | |
674 | return 0; /* BOOLEAN with value FALSE */ | |
675 | break; | |
676 | ||
677 | default: | |
678 | error ("Language not supported."); | |
679 | } | |
680 | } | |
681 | \f | |
682 | /* Returns non-zero if the operator OP is defined on | |
683 | the values ARG1 and ARG2. */ | |
684 | void | |
685 | binop_type_check(arg1,arg2,op) | |
686 | value arg1,arg2; | |
687 | int op; | |
688 | { | |
689 | struct type *t1, *t2; | |
690 | ||
691 | /* If we're not checking types, always return success. */ | |
692 | if (!STRICT_TYPE) | |
693 | return; | |
694 | ||
695 | t1=VALUE_TYPE(arg1); | |
696 | if (arg2!=(value)NULL) | |
697 | t2=VALUE_TYPE(arg2); | |
698 | else | |
699 | t2=NULL; | |
700 | ||
701 | switch(op) | |
702 | { | |
703 | case BINOP_ADD: | |
704 | case BINOP_SUB: | |
705 | if ((numeric_type(t1) && pointer_type(t2)) || | |
706 | (pointer_type(t1) && numeric_type(t2))) | |
707 | { | |
708 | printf("warning: combining pointer and integer.\n"); | |
709 | break; | |
710 | } | |
711 | case BINOP_MUL: | |
712 | case BINOP_LSH: | |
713 | case BINOP_RSH: | |
714 | if (!numeric_type(t1) || !numeric_type(t2)) | |
715 | type_op_error ("Arguments to %s must be numbers.",op); | |
716 | else if (!same_type(t1,t2)) | |
717 | type_op_error ("Arguments to %s must be of the same type.",op); | |
718 | break; | |
719 | ||
720 | case BINOP_AND: | |
721 | case BINOP_OR: | |
722 | if (!boolean_type(t1) || !boolean_type(t2)) | |
723 | type_op_error ("Arguments to %s must be of boolean type.",op); | |
724 | break; | |
725 | ||
726 | case BINOP_EQUAL: | |
727 | if ((pointer_type(t1) && !(pointer_type(t2) || integral_type(t2))) || | |
728 | (pointer_type(t2) && !(pointer_type(t1) || integral_type(t1)))) | |
729 | type_op_error ("A pointer can only be compared to an integer or pointer.",op); | |
730 | else if ((pointer_type(t1) && integral_type(t2)) || | |
731 | (integral_type(t1) && pointer_type(t2))) | |
732 | { | |
733 | printf("warning: combining integer and pointer.\n"); | |
734 | break; | |
735 | } | |
736 | else if (!simple_type(t1) || !simple_type(t2)) | |
737 | type_op_error ("Arguments to %s must be of simple type.",op); | |
738 | else if (!same_type(t1,t2)) | |
739 | type_op_error ("Arguments to %s must be of the same type.",op); | |
740 | break; | |
741 | ||
742 | case BINOP_REM: | |
743 | if (!integral_type(t1) || !integral_type(t2)) | |
744 | type_op_error ("Arguments to %s must be of integral type.",op); | |
745 | break; | |
746 | ||
747 | case BINOP_LESS: | |
748 | case BINOP_GTR: | |
749 | case BINOP_LEQ: | |
750 | case BINOP_GEQ: | |
751 | if (!ordered_type(t1) || !ordered_type(t2)) | |
752 | type_op_error ("Arguments to %s must be of ordered type.",op); | |
753 | else if (!same_type(t1,t2)) | |
754 | type_op_error ("Arguments to %s must be of the same type.",op); | |
755 | break; | |
756 | ||
757 | case BINOP_ASSIGN: | |
758 | if (pointer_type(t1) && !integral_type(t2)) | |
759 | type_op_error ("A pointer can only be assigned an integer.",op); | |
760 | else if (pointer_type(t1) && integral_type(t2)) | |
761 | { | |
762 | printf("warning: combining integer and pointer."); | |
763 | break; | |
764 | } | |
765 | else if (!simple_type(t1) || !simple_type(t2)) | |
766 | type_op_error ("Arguments to %s must be of simple type.",op); | |
767 | else if (!same_type(t1,t2)) | |
768 | type_op_error ("Arguments to %s must be of the same type.",op); | |
769 | break; | |
770 | ||
771 | /* Unary checks -- arg2 is null */ | |
772 | ||
773 | case UNOP_ZEROP: | |
774 | if (!boolean_type(t1)) | |
775 | type_op_error ("Argument to %s must be of boolean type.",op); | |
776 | break; | |
777 | ||
778 | case UNOP_PLUS: | |
779 | case UNOP_NEG: | |
780 | if (!numeric_type(t1)) | |
781 | type_op_error ("Argument to %s must be of numeric type.",op); | |
782 | break; | |
783 | ||
784 | case UNOP_IND: | |
785 | if (integral_type(t1)) | |
786 | { | |
787 | printf("warning: combining pointer and integer.\n"); | |
788 | break; | |
789 | } | |
790 | else if (!pointer_type(t1)) | |
791 | type_op_error ("Argument to %s must be a pointer.",op); | |
792 | break; | |
793 | ||
794 | case UNOP_PREINCREMENT: | |
795 | case UNOP_POSTINCREMENT: | |
796 | case UNOP_PREDECREMENT: | |
797 | case UNOP_POSTDECREMENT: | |
798 | if (!ordered_type(t1)) | |
799 | type_op_error ("Argument to %s must be of an ordered type.",op); | |
800 | break; | |
801 | ||
802 | default: | |
803 | /* Ok. The following operators have different meanings in | |
804 | different languages. */ | |
805 | switch(current_language->la_language) | |
806 | { | |
807 | #ifdef _LANG_c | |
808 | case language_c: | |
545af6ce | 809 | case language_cplus: |
c8023e66 JG |
810 | switch(op) |
811 | { | |
812 | case BINOP_DIV: | |
813 | if (!numeric_type(t1) || !numeric_type(t2)) | |
814 | type_op_error ("Arguments to %s must be numbers.",op); | |
815 | break; | |
816 | } | |
817 | break; | |
818 | #endif | |
819 | ||
820 | #ifdef _LANG_m2 | |
821 | case language_m2: | |
822 | switch(op) | |
823 | { | |
824 | case BINOP_DIV: | |
825 | if (!float_type(t1) || !float_type(t2)) | |
826 | type_op_error ("Arguments to %s must be floating point numbers.",op); | |
827 | break; | |
828 | case BINOP_INTDIV: | |
829 | if (!integral_type(t1) || !integral_type(t2)) | |
830 | type_op_error ("Arguments to %s must be of integral type.",op); | |
831 | break; | |
832 | } | |
833 | #endif | |
834 | } | |
835 | } | |
836 | } | |
837 | \f | |
838 | /* This page contains functions for the printing out of | |
839 | error messages that occur during type- and range- | |
840 | checking. */ | |
841 | ||
842 | /* Prints the format string FMT with the operator as a string | |
843 | corresponding to the opcode OP. If FATAL is non-zero, then | |
844 | this is an error and error () is called. Otherwise, it is | |
845 | a warning and printf() is called. */ | |
846 | void | |
847 | op_error (fmt,op,fatal) | |
848 | char *fmt; | |
849 | enum exp_opcode op; | |
850 | int fatal; | |
851 | { | |
852 | if (fatal) | |
853 | error (fmt,op_string(op)); | |
854 | else | |
855 | { | |
856 | printf("warning: "); | |
857 | printf(fmt,op_string(op)); | |
858 | printf("\n"); | |
859 | } | |
860 | } | |
861 | ||
862 | /* These are called when a language fails a type- or range-check. | |
863 | The first argument should be a printf()-style format string, and | |
864 | the rest of the arguments should be its arguments. If | |
865 | [type|range]_check is [type|range]_check_on, then return_to_top_level() | |
866 | is called in the style of error (). Otherwise, the message is prefixed | |
867 | by "warning: " and we do not return to the top level. */ | |
868 | void | |
869 | type_error (va_alist) | |
870 | va_dcl | |
871 | { | |
872 | va_list args; | |
873 | char *string; | |
874 | ||
875 | if (type_check==type_check_warn) | |
876 | fprintf(stderr,"warning: "); | |
877 | else | |
878 | target_terminal_ours(); | |
879 | ||
880 | va_start (args); | |
881 | string = va_arg (args, char *); | |
882 | vfprintf (stderr, string, args); | |
883 | fprintf (stderr, "\n"); | |
884 | va_end (args); | |
885 | if (type_check==type_check_on) | |
886 | return_to_top_level(); | |
887 | } | |
888 | ||
889 | void | |
890 | range_error (va_alist) | |
891 | va_dcl | |
892 | { | |
893 | va_list args; | |
894 | char *string; | |
895 | ||
896 | if (range_check==range_check_warn) | |
897 | fprintf(stderr,"warning: "); | |
898 | else | |
899 | target_terminal_ours(); | |
900 | ||
901 | va_start (args); | |
902 | string = va_arg (args, char *); | |
903 | vfprintf (stderr, string, args); | |
904 | fprintf (stderr, "\n"); | |
905 | va_end (args); | |
906 | if (range_check==range_check_on) | |
907 | return_to_top_level(); | |
908 | } | |
909 | ||
910 | \f | |
911 | /* This page contains miscellaneous functions */ | |
912 | ||
913 | /* Return the language as a string */ | |
914 | char * | |
915 | language_str(lang) | |
916 | enum language lang; | |
917 | { | |
918 | int i; | |
919 | ||
920 | for (i = 0; i < languages_size; i++) { | |
921 | if (languages[i]->la_language == lang) { | |
922 | return languages[i]->la_name; | |
923 | } | |
924 | } | |
925 | return "Unknown"; | |
926 | } | |
927 | ||
928 | struct cmd_list_element *setchecklist = NULL; | |
929 | struct cmd_list_element *showchecklist = NULL; | |
930 | ||
931 | static void | |
d8ce1326 JG |
932 | set_check (ignore, from_tty) |
933 | char *ignore; | |
c8023e66 JG |
934 | int from_tty; |
935 | { | |
936 | printf( | |
937 | "\"set check\" must be followed by the name of a check subcommand.\n"); | |
938 | help_list(setchecklist, "set check ", -1, stdout); | |
939 | } | |
940 | ||
941 | static void | |
942 | show_check (arg, from_tty) | |
943 | char *arg; | |
944 | int from_tty; | |
945 | { | |
946 | cmd_show_list(showchecklist, from_tty, ""); | |
947 | } | |
948 | \f | |
949 | /* Add a language to the set of known languages. */ | |
950 | ||
951 | void | |
952 | add_language (lang) | |
953 | struct language_defn *lang; | |
954 | { | |
955 | if (lang->la_magic != LANG_MAGIC) | |
956 | { | |
957 | fprintf(stderr, "Magic number of %s language struct wrong\n", | |
958 | lang->la_name); | |
959 | abort(); | |
960 | } | |
961 | ||
962 | if (!languages) | |
963 | { | |
964 | languages_allocsize = DEFAULT_ALLOCSIZE; | |
965 | languages = (struct language_defn **) xmalloc | |
966 | (languages_allocsize * sizeof (*languages)); | |
967 | } | |
968 | if (languages_size >= languages_allocsize) | |
969 | { | |
970 | languages_allocsize *= 2; | |
971 | languages = (struct language_defn **) xrealloc (languages, | |
972 | languages_allocsize * sizeof (*languages)); | |
973 | } | |
974 | languages[languages_size++] = lang; | |
975 | ||
976 | #if FIXME | |
977 | if (targetlist == NULL) | |
978 | add_prefix_cmd ("target", class_run, target_command, | |
979 | "Connect to a target machine or process.\n\ | |
980 | The first argument is the type or protocol of the target machine.\n\ | |
981 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
982 | information on the arguments for a particular protocol, type\n\ | |
983 | `help target ' followed by the protocol name.", | |
984 | &targetlist, "target ", 0, &cmdlist); | |
985 | add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist); | |
986 | #endif FIXME | |
987 | } | |
988 | ||
989 | /* Define the language that is no language. */ | |
990 | ||
991 | int | |
992 | unk_lang_parser () | |
993 | { | |
994 | return 1; | |
995 | } | |
996 | ||
997 | void | |
998 | unk_lang_error () | |
999 | { | |
1000 | error ("Attempted to parse an expression with unknown language"); | |
1001 | } | |
1002 | ||
1003 | static struct type ** const (unknown_builtin_types[]) = { 0 }; | |
1004 | static const struct op_print unk_op_print_tab[] = { 0 }; | |
1005 | ||
1006 | const struct language_defn unknown_language_defn = { | |
1007 | "unknown", | |
1008 | language_unknown, | |
1009 | &unknown_builtin_types[0], | |
1010 | range_check_off, | |
1011 | type_check_off, | |
1012 | unk_lang_parser, | |
1013 | unk_lang_error, | |
1014 | &builtin_type_error, /* longest signed integral type */ | |
1015 | &builtin_type_error, /* longest unsigned integral type */ | |
1016 | &builtin_type_error, /* longest floating point type */ | |
1017 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1018 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1019 | unk_op_print_tab, /* expression operators for printing */ | |
1020 | LANG_MAGIC | |
1021 | }; | |
1022 | ||
1023 | /* These two structs define fake entries for the "local" and "auto" options. */ | |
1024 | const struct language_defn auto_language_defn = { | |
1025 | "auto", | |
1026 | language_auto, | |
1027 | &unknown_builtin_types[0], | |
1028 | range_check_off, | |
1029 | type_check_off, | |
1030 | unk_lang_parser, | |
1031 | unk_lang_error, | |
1032 | &builtin_type_error, /* longest signed integral type */ | |
1033 | &builtin_type_error, /* longest unsigned integral type */ | |
1034 | &builtin_type_error, /* longest floating point type */ | |
1035 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1036 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1037 | unk_op_print_tab, /* expression operators for printing */ | |
1038 | LANG_MAGIC | |
1039 | }; | |
1040 | ||
1041 | const struct language_defn local_language_defn = { | |
1042 | "local", | |
1043 | language_auto, | |
1044 | &unknown_builtin_types[0], | |
1045 | range_check_off, | |
1046 | type_check_off, | |
1047 | unk_lang_parser, | |
1048 | unk_lang_error, | |
1049 | &builtin_type_error, /* longest signed integral type */ | |
1050 | &builtin_type_error, /* longest unsigned integral type */ | |
1051 | &builtin_type_error, /* longest floating point type */ | |
1052 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1053 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1054 | unk_op_print_tab, /* expression operators for printing */ | |
1055 | LANG_MAGIC | |
1056 | }; | |
1057 | \f | |
1058 | /* Initialize the language routines */ | |
1059 | ||
1060 | void | |
1061 | _initialize_language() | |
1062 | { | |
1063 | struct cmd_list_element *set, *show; | |
1064 | ||
1065 | /* GDB commands for language specific stuff */ | |
1066 | ||
1067 | set = add_set_cmd ("language", class_support, var_string_noescape, | |
1068 | (char *)&language, | |
0b798409 | 1069 | "Set the current source language.", |
c8023e66 JG |
1070 | &setlist); |
1071 | show = add_show_from_set (set, &showlist); | |
1072 | set->function = set_language_command; | |
1073 | show->function = show_language_command; | |
1074 | ||
1075 | add_prefix_cmd ("check", no_class, set_check, | |
1076 | "Set the status of the type/range checker", | |
1077 | &setchecklist, "set check ", 0, &setlist); | |
1078 | add_alias_cmd ("c", "check", no_class, 1, &setlist); | |
1079 | add_alias_cmd ("ch", "check", no_class, 1, &setlist); | |
1080 | ||
1081 | add_prefix_cmd ("check", no_class, show_check, | |
1082 | "Show the status of the type/range checker", | |
7cb83757 | 1083 | &showchecklist, "show check ", 0, &showlist); |
c8023e66 JG |
1084 | add_alias_cmd ("c", "check", no_class, 1, &showlist); |
1085 | add_alias_cmd ("ch", "check", no_class, 1, &showlist); | |
1086 | ||
1087 | set = add_set_cmd ("type", class_support, var_string_noescape, | |
1088 | (char *)&type, | |
7cb83757 | 1089 | "Set type checking. (on/warn/off/auto)", |
c8023e66 JG |
1090 | &setchecklist); |
1091 | show = add_show_from_set (set, &showchecklist); | |
1092 | set->function = set_type_command; | |
1093 | show->function = show_type_command; | |
1094 | ||
1095 | set = add_set_cmd ("range", class_support, var_string_noescape, | |
1096 | (char *)&range, | |
7cb83757 | 1097 | "Set range checking. (on/warn/off/auto)", |
c8023e66 JG |
1098 | &setchecklist); |
1099 | show = add_show_from_set (set, &showchecklist); | |
1100 | set->function = set_range_command; | |
1101 | show->function = show_range_command; | |
1102 | ||
1103 | add_language (&unknown_language_defn); | |
1104 | add_language (&local_language_defn); | |
1105 | add_language (&auto_language_defn); | |
1106 | ||
1107 | language = savestring ("auto",strlen("auto")); | |
1108 | range = savestring ("auto",strlen("auto")); | |
1109 | type = savestring ("auto",strlen("auto")); | |
1110 | ||
1111 | /* Have the above take effect */ | |
1112 | ||
5f3d478e | 1113 | set_language_command (language, 0); |
c8023e66 JG |
1114 | set_type_command (NULL, 0); |
1115 | set_range_command (NULL, 0); | |
1116 | } |