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c8023e66 | 1 | /* Multiple source language support for GDB. |
7ed0f002 | 2 | Copyright 1991, 1992 Free Software Foundation, Inc. |
c8023e66 JG |
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 | ||
d747e0af | 30 | #include "defs.h" |
c8023e66 JG |
31 | #include <string.h> |
32 | #include <varargs.h> | |
33 | ||
c8023e66 | 34 | #include "symtab.h" |
1ab3bf1b | 35 | #include "gdbtypes.h" |
c8023e66 JG |
36 | #include "value.h" |
37 | #include "gdbcmd.h" | |
38 | #include "frame.h" | |
c8023e66 | 39 | #include "expression.h" |
7ed0f002 | 40 | #include "language.h" |
c8023e66 JG |
41 | #include "target.h" |
42 | #include "parser-defs.h" | |
43 | ||
7ed0f002 JG |
44 | static void |
45 | show_language_command PARAMS ((char *, int)); | |
46 | ||
47 | static void | |
48 | set_language_command PARAMS ((char *, int)); | |
49 | ||
50 | static void | |
51 | show_type_command PARAMS ((char *, int)); | |
c4668207 | 52 | |
7ed0f002 JG |
53 | static void |
54 | set_type_command PARAMS ((char *, int)); | |
55 | ||
56 | static void | |
57 | show_range_command PARAMS ((char *, int)); | |
58 | ||
59 | static void | |
60 | set_range_command PARAMS ((char *, int)); | |
61 | ||
62 | static void | |
63 | set_range_str PARAMS ((void)); | |
64 | ||
65 | static void | |
66 | set_type_str PARAMS ((void)); | |
67 | ||
68 | static void | |
69 | set_lang_str PARAMS ((void)); | |
70 | ||
71 | static void | |
72 | unk_lang_error PARAMS ((char *)); | |
73 | ||
74 | static int | |
75 | unk_lang_parser PARAMS ((void)); | |
76 | ||
77 | static void | |
78 | show_check PARAMS ((char *, int)); | |
79 | ||
80 | static void | |
81 | set_check PARAMS ((char *, int)); | |
82 | ||
83 | static void | |
84 | set_type_range PARAMS ((void)); | |
c8023e66 JG |
85 | |
86 | /* Forward declaration */ | |
0c6efbcc | 87 | extern const struct language_defn unknown_language_defn; |
7ed0f002 | 88 | |
c8023e66 JG |
89 | /* The current (default at startup) state of type and range checking. |
90 | (If the modes are set to "auto", though, these are changed based | |
91 | on the default language at startup, and then again based on the | |
92 | language of the first source file. */ | |
93 | ||
94 | enum range_mode range_mode = range_mode_auto; | |
95 | enum range_check range_check = range_check_off; | |
96 | enum type_mode type_mode = type_mode_auto; | |
97 | enum type_check type_check = type_check_off; | |
98 | ||
99 | /* The current language and language_mode (see language.h) */ | |
100 | ||
0c6efbcc | 101 | const struct language_defn *current_language = &unknown_language_defn; |
c8023e66 JG |
102 | enum language_mode language_mode = language_mode_auto; |
103 | ||
104 | /* The list of supported languages. The list itself is malloc'd. */ | |
105 | ||
7ed0f002 | 106 | static const struct language_defn **languages; |
c8023e66 JG |
107 | static unsigned languages_size; |
108 | static unsigned languages_allocsize; | |
109 | #define DEFAULT_ALLOCSIZE 3 | |
110 | ||
111 | /* The "set language/type/range" commands all put stuff in these | |
112 | buffers. This is to make them work as set/show commands. The | |
113 | user's string is copied here, then the set_* commands look at | |
114 | them and update them to something that looks nice when it is | |
115 | printed out. */ | |
116 | ||
117 | static char *language; | |
118 | static char *type; | |
119 | static char *range; | |
120 | ||
121 | /* Warning issued when current_language and the language of the current | |
122 | frame do not match. */ | |
123 | char lang_frame_mismatch_warn[] = | |
124 | "Warning: the current language does not match this frame."; | |
125 | ||
c8023e66 JG |
126 | \f |
127 | /* This page contains the functions corresponding to GDB commands | |
128 | and their helpers. */ | |
129 | ||
130 | /* Show command. Display a warning if the language set | |
131 | does not match the frame. */ | |
7ed0f002 | 132 | static void |
d8ce1326 JG |
133 | show_language_command (ignore, from_tty) |
134 | char *ignore; | |
c8023e66 JG |
135 | int from_tty; |
136 | { | |
137 | enum language flang; /* The language of the current frame */ | |
138 | ||
139 | flang = get_frame_language(); | |
140 | if (flang != language_unknown && | |
141 | language_mode == language_mode_manual && | |
142 | current_language->la_language != flang) | |
143 | printf_filtered("%s\n",lang_frame_mismatch_warn); | |
144 | } | |
145 | ||
146 | /* Set command. Change the current working language. */ | |
7ed0f002 | 147 | static void |
d8ce1326 JG |
148 | set_language_command (ignore, from_tty) |
149 | char *ignore; | |
c8023e66 JG |
150 | int from_tty; |
151 | { | |
152 | int i; | |
153 | enum language flang; | |
5f3d478e | 154 | char *err_lang; |
c8023e66 JG |
155 | |
156 | /* FIXME -- do this from the list, with HELP. */ | |
157 | if (!language || !language[0]) { | |
158 | printf("The currently understood settings are:\n\n\ | |
159 | local or auto Automatic setting based on source file\n\ | |
0b798409 | 160 | c Use the C language\n\ |
545af6ce | 161 | c++ Use the C++ language\n\ |
0b798409 JG |
162 | modula-2 Use the Modula-2 language\n"); |
163 | /* Restore the silly string. */ | |
164 | set_language(current_language->la_language); | |
c8023e66 JG |
165 | return; |
166 | } | |
167 | ||
168 | /* Search the list of languages for a match. */ | |
169 | for (i = 0; i < languages_size; i++) { | |
170 | if (!strcmp (languages[i]->la_name, language)) { | |
171 | /* Found it! Go into manual mode, and use this language. */ | |
172 | if (languages[i]->la_language == language_auto) { | |
173 | /* Enter auto mode. Set to the current frame's language, if known. */ | |
174 | language_mode = language_mode_auto; | |
175 | flang = get_frame_language(); | |
176 | if (flang!=language_unknown) | |
177 | set_language(flang); | |
178 | return; | |
179 | } else { | |
180 | /* Enter manual mode. Set the specified language. */ | |
181 | language_mode = language_mode_manual; | |
182 | current_language = languages[i]; | |
183 | set_type_range (); | |
184 | set_lang_str(); | |
185 | return; | |
186 | } | |
187 | } | |
188 | } | |
189 | ||
5f3d478e JG |
190 | /* Reset the language (esp. the global string "language") to the |
191 | correct values. */ | |
192 | err_lang=savestring(language,strlen(language)); | |
193 | make_cleanup (free, err_lang); /* Free it after error */ | |
194 | set_language(current_language->la_language); | |
195 | error ("Unknown language `%s'.",err_lang); | |
c8023e66 JG |
196 | } |
197 | ||
198 | /* Show command. Display a warning if the type setting does | |
199 | not match the current language. */ | |
7ed0f002 | 200 | static void |
d8ce1326 JG |
201 | show_type_command(ignore, from_tty) |
202 | char *ignore; | |
c8023e66 JG |
203 | int from_tty; |
204 | { | |
205 | if (type_check != current_language->la_type_check) | |
206 | printf( | |
207 | "Warning: the current type check setting does not match the language.\n"); | |
208 | } | |
209 | ||
210 | /* Set command. Change the setting for type checking. */ | |
7ed0f002 | 211 | static void |
d8ce1326 JG |
212 | set_type_command(ignore, from_tty) |
213 | char *ignore; | |
c8023e66 JG |
214 | int from_tty; |
215 | { | |
216 | if (!strcmp(type,"on")) | |
217 | { | |
218 | type_check = type_check_on; | |
219 | type_mode = type_mode_manual; | |
220 | } | |
221 | else if (!strcmp(type,"warn")) | |
222 | { | |
223 | type_check = type_check_warn; | |
224 | type_mode = type_mode_manual; | |
225 | } | |
226 | else if (!strcmp(type,"off")) | |
227 | { | |
228 | type_check = type_check_off; | |
229 | type_mode = type_mode_manual; | |
230 | } | |
231 | else if (!strcmp(type,"auto")) | |
232 | { | |
233 | type_mode = type_mode_auto; | |
234 | set_type_range(); | |
235 | /* Avoid hitting the set_type_str call below. We | |
236 | did it in set_type_range. */ | |
237 | return; | |
238 | } | |
239 | set_type_str(); | |
d8ce1326 | 240 | show_type_command((char *)NULL, from_tty); |
c8023e66 JG |
241 | } |
242 | ||
243 | /* Show command. Display a warning if the range setting does | |
244 | not match the current language. */ | |
7ed0f002 | 245 | static void |
d8ce1326 JG |
246 | show_range_command(ignore, from_tty) |
247 | char *ignore; | |
c8023e66 JG |
248 | int from_tty; |
249 | { | |
250 | ||
251 | if (range_check != current_language->la_range_check) | |
252 | printf( | |
253 | "Warning: the current range check setting does not match the language.\n"); | |
254 | } | |
255 | ||
256 | /* Set command. Change the setting for range checking. */ | |
7ed0f002 | 257 | static void |
d8ce1326 JG |
258 | set_range_command(ignore, from_tty) |
259 | char *ignore; | |
c8023e66 JG |
260 | int from_tty; |
261 | { | |
262 | if (!strcmp(range,"on")) | |
263 | { | |
264 | range_check = range_check_on; | |
265 | range_mode = range_mode_manual; | |
266 | } | |
267 | else if (!strcmp(range,"warn")) | |
268 | { | |
269 | range_check = range_check_warn; | |
270 | range_mode = range_mode_manual; | |
271 | } | |
272 | else if (!strcmp(range,"off")) | |
273 | { | |
274 | range_check = range_check_off; | |
275 | range_mode = range_mode_manual; | |
276 | } | |
277 | else if (!strcmp(range,"auto")) | |
278 | { | |
279 | range_mode = range_mode_auto; | |
280 | set_type_range(); | |
281 | /* Avoid hitting the set_range_str call below. We | |
282 | did it in set_type_range. */ | |
283 | return; | |
284 | } | |
285 | set_range_str(); | |
d8ce1326 | 286 | show_range_command((char *)0, from_tty); |
c8023e66 JG |
287 | } |
288 | ||
289 | /* Set the status of range and type checking based on | |
290 | the current modes and the current language. | |
291 | If SHOW is non-zero, then print out the current language, | |
292 | type and range checking status. */ | |
293 | static void | |
294 | set_type_range() | |
295 | { | |
c8023e66 JG |
296 | |
297 | if (range_mode == range_mode_auto) | |
298 | range_check = current_language->la_range_check; | |
299 | ||
300 | if (type_mode == type_mode_auto) | |
301 | type_check = current_language->la_type_check; | |
302 | ||
303 | set_type_str(); | |
304 | set_range_str(); | |
305 | } | |
306 | ||
307 | /* Set current language to (enum language) LANG. */ | |
308 | ||
309 | void | |
310 | set_language(lang) | |
311 | enum language lang; | |
312 | { | |
313 | int i; | |
314 | ||
315 | for (i = 0; i < languages_size; i++) { | |
316 | if (languages[i]->la_language == lang) { | |
317 | current_language = languages[i]; | |
318 | set_type_range (); | |
319 | set_lang_str(); | |
545af6ce | 320 | break; |
c8023e66 JG |
321 | } |
322 | } | |
323 | } | |
324 | \f | |
325 | /* This page contains functions that update the global vars | |
326 | language, type and range. */ | |
7ed0f002 | 327 | static void |
c8023e66 JG |
328 | set_lang_str() |
329 | { | |
d8ce1326 | 330 | char *prefix = ""; |
c8023e66 JG |
331 | |
332 | free (language); | |
333 | if (language_mode == language_mode_auto) | |
334 | prefix = "auto; currently "; | |
335 | ||
58ae87f6 | 336 | language = concat(prefix, current_language->la_name, NULL); |
c8023e66 JG |
337 | } |
338 | ||
7ed0f002 | 339 | static void |
c8023e66 JG |
340 | set_type_str() |
341 | { | |
342 | char *tmp, *prefix = ""; | |
343 | ||
344 | free (type); | |
345 | if (type_mode==type_mode_auto) | |
346 | prefix = "auto; currently "; | |
347 | ||
348 | switch(type_check) | |
349 | { | |
350 | case type_check_on: | |
351 | tmp = "on"; | |
352 | break; | |
353 | case type_check_off: | |
354 | tmp = "off"; | |
355 | break; | |
356 | case type_check_warn: | |
357 | tmp = "warn"; | |
358 | break; | |
359 | default: | |
360 | error ("Unrecognized type check setting."); | |
361 | } | |
362 | ||
58ae87f6 | 363 | type = concat(prefix,tmp,NULL); |
c8023e66 JG |
364 | } |
365 | ||
7ed0f002 | 366 | static void |
c8023e66 JG |
367 | set_range_str() |
368 | { | |
369 | char *tmp, *pref = ""; | |
370 | ||
371 | free (range); | |
372 | if (range_mode==range_mode_auto) | |
373 | pref = "auto; currently "; | |
374 | ||
375 | switch(range_check) | |
376 | { | |
377 | case range_check_on: | |
378 | tmp = "on"; | |
379 | break; | |
380 | case range_check_off: | |
381 | tmp = "off"; | |
382 | break; | |
383 | case range_check_warn: | |
384 | tmp = "warn"; | |
385 | break; | |
386 | default: | |
387 | error ("Unrecognized range check setting."); | |
388 | } | |
389 | ||
58ae87f6 | 390 | range = concat(pref,tmp,NULL); |
c8023e66 JG |
391 | } |
392 | ||
393 | ||
394 | /* Print out the current language settings: language, range and | |
7ed0f002 | 395 | type checking. If QUIETLY, print only what has changed. */ |
c8023e66 | 396 | void |
7ed0f002 JG |
397 | language_info (quietly) |
398 | int quietly; | |
c8023e66 | 399 | { |
7ed0f002 | 400 | /* FIXME: quietly is ignored at the moment. */ |
c8023e66 | 401 | printf("Current Language: %s\n",language); |
d8ce1326 | 402 | show_language_command((char *)0, 1); |
c8023e66 | 403 | printf("Type checking: %s\n",type); |
d8ce1326 | 404 | show_type_command((char *)0, 1); |
c8023e66 | 405 | printf("Range checking: %s\n",range); |
d8ce1326 | 406 | show_range_command((char *)0, 1); |
c8023e66 JG |
407 | } |
408 | \f | |
409 | /* Return the result of a binary operation. */ | |
7ed0f002 JG |
410 | |
411 | #if 0 /* Currently unused */ | |
412 | ||
c8023e66 JG |
413 | struct type * |
414 | binop_result_type(v1,v2) | |
415 | value v1,v2; | |
416 | { | |
417 | int l1,l2,size,uns; | |
418 | ||
d8ce1326 JG |
419 | l1 = TYPE_LENGTH(VALUE_TYPE(v1)); |
420 | l2 = TYPE_LENGTH(VALUE_TYPE(v2)); | |
c8023e66 JG |
421 | |
422 | switch(current_language->la_language) | |
423 | { | |
424 | case language_c: | |
545af6ce | 425 | case language_cplus: |
c8023e66 JG |
426 | if (TYPE_CODE(VALUE_TYPE(v1))==TYPE_CODE_FLT) |
427 | return TYPE_CODE(VALUE_TYPE(v2)) == TYPE_CODE_FLT && l2 > l1 ? | |
428 | VALUE_TYPE(v2) : VALUE_TYPE(v1); | |
429 | else if (TYPE_CODE(VALUE_TYPE(v2))==TYPE_CODE_FLT) | |
430 | return TYPE_CODE(VALUE_TYPE(v1)) == TYPE_CODE_FLT && l1 > l2 ? | |
431 | VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
432 | else if (TYPE_UNSIGNED(VALUE_TYPE(v1)) && l1 > l2) | |
433 | return VALUE_TYPE(v1); | |
434 | else if (TYPE_UNSIGNED(VALUE_TYPE(v2)) && l2 > l1) | |
435 | return VALUE_TYPE(v2); | |
436 | else /* Both are signed. Result is the longer type */ | |
437 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
438 | break; | |
439 | case language_m2: | |
440 | /* If we are doing type-checking, l1 should equal l2, so this is | |
441 | not needed. */ | |
442 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
443 | break; | |
444 | } | |
d8ce1326 JG |
445 | abort(); |
446 | return (struct type *)0; /* For lint */ | |
c8023e66 | 447 | } |
7ed0f002 JG |
448 | |
449 | #endif /* 0 */ | |
450 | ||
c8023e66 JG |
451 | \f |
452 | /* This page contains functions that return format strings for | |
453 | printf for printing out numbers in different formats */ | |
454 | ||
455 | /* Returns the appropriate printf format for hexadecimal | |
456 | numbers. */ | |
457 | char * | |
458 | local_hex_format_custom(pre) | |
459 | char *pre; | |
460 | { | |
461 | static char form[50]; | |
462 | ||
463 | strcpy (form, current_language->la_hex_format_pre); | |
464 | strcat (form, pre); | |
465 | strcat (form, current_language->la_hex_format_suf); | |
466 | return form; | |
467 | } | |
468 | ||
469 | /* Converts a number to hexadecimal and stores it in a static | |
470 | string. Returns a pointer to this string. */ | |
471 | char * | |
472 | local_hex_string (num) | |
473 | int num; | |
474 | { | |
475 | static char res[50]; | |
476 | ||
477 | sprintf (res, current_language->la_hex_format, num); | |
478 | return res; | |
479 | } | |
480 | ||
481 | /* Converts a number to custom hexadecimal and stores it in a static | |
482 | string. Returns a pointer to this string. */ | |
483 | char * | |
484 | local_hex_string_custom(num,pre) | |
485 | int num; | |
486 | char *pre; | |
487 | { | |
488 | static char res[50]; | |
489 | ||
490 | sprintf (res, local_hex_format_custom(pre), num); | |
491 | return res; | |
492 | } | |
493 | ||
494 | /* Returns the appropriate printf format for octal | |
495 | numbers. */ | |
496 | char * | |
497 | local_octal_format_custom(pre) | |
498 | char *pre; | |
499 | { | |
500 | static char form[50]; | |
501 | ||
502 | strcpy (form, current_language->la_octal_format_pre); | |
503 | strcat (form, pre); | |
504 | strcat (form, current_language->la_octal_format_suf); | |
505 | return form; | |
506 | } | |
507 | \f | |
508 | /* This page contains functions that are used in type/range checking. | |
509 | They all return zero if the type/range check fails. | |
510 | ||
511 | It is hoped that these will make extending GDB to parse different | |
512 | languages a little easier. These are primarily used in eval.c when | |
513 | evaluating expressions and making sure that their types are correct. | |
514 | Instead of having a mess of conjucted/disjuncted expressions in an "if", | |
515 | the ideas of type can be wrapped up in the following functions. | |
516 | ||
517 | Note that some of them are not currently dependent upon which language | |
518 | is currently being parsed. For example, floats are the same in | |
519 | C and Modula-2 (ie. the only floating point type has TYPE_CODE of | |
520 | TYPE_CODE_FLT), while booleans are different. */ | |
521 | ||
522 | /* Returns non-zero if its argument is a simple type. This is the same for | |
523 | both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur, | |
524 | and thus will never cause the failure of the test. */ | |
525 | int | |
526 | simple_type(type) | |
527 | struct type *type; | |
528 | { | |
529 | switch (TYPE_CODE (type)) { | |
530 | case TYPE_CODE_INT: | |
531 | case TYPE_CODE_CHAR: | |
532 | case TYPE_CODE_ENUM: | |
533 | case TYPE_CODE_FLT: | |
534 | case TYPE_CODE_RANGE: | |
535 | case TYPE_CODE_BOOL: | |
536 | return 1; | |
537 | ||
538 | default: | |
539 | return 0; | |
540 | } | |
541 | } | |
542 | ||
543 | /* Returns non-zero if its argument is of an ordered type. */ | |
544 | int | |
545 | ordered_type (type) | |
546 | struct type *type; | |
547 | { | |
548 | switch (TYPE_CODE (type)) { | |
549 | case TYPE_CODE_INT: | |
550 | case TYPE_CODE_CHAR: | |
551 | case TYPE_CODE_ENUM: | |
552 | case TYPE_CODE_FLT: | |
553 | case TYPE_CODE_RANGE: | |
554 | return 1; | |
555 | ||
556 | default: | |
557 | return 0; | |
558 | } | |
559 | } | |
560 | ||
561 | /* Returns non-zero if the two types are the same */ | |
562 | int | |
563 | same_type (arg1, arg2) | |
564 | struct type *arg1, *arg2; | |
565 | { | |
566 | if (structured_type(arg1) ? !structured_type(arg2) : structured_type(arg2)) | |
567 | /* One is structured and one isn't */ | |
568 | return 0; | |
569 | else if (structured_type(arg1) && structured_type(arg2)) | |
570 | return arg1 == arg2; | |
571 | else if (numeric_type(arg1) && numeric_type(arg2)) | |
572 | return (TYPE_CODE(arg2) == TYPE_CODE(arg1)) && | |
573 | (TYPE_UNSIGNED(arg1) == TYPE_UNSIGNED(arg2)) | |
574 | ? 1 : 0; | |
575 | else | |
576 | return arg1==arg2; | |
577 | } | |
578 | ||
579 | /* Returns non-zero if the type is integral */ | |
580 | int | |
581 | integral_type (type) | |
582 | struct type *type; | |
583 | { | |
584 | switch(current_language->la_language) | |
585 | { | |
586 | case language_c: | |
545af6ce | 587 | case language_cplus: |
c8023e66 JG |
588 | return (TYPE_CODE(type) != TYPE_CODE_INT) && |
589 | (TYPE_CODE(type) != TYPE_CODE_ENUM) ? 0 : 1; | |
590 | case language_m2: | |
591 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; | |
592 | default: | |
593 | error ("Language not supported."); | |
594 | } | |
595 | } | |
596 | ||
597 | /* Returns non-zero if the value is numeric */ | |
598 | int | |
599 | numeric_type (type) | |
600 | struct type *type; | |
601 | { | |
602 | switch (TYPE_CODE (type)) { | |
603 | case TYPE_CODE_INT: | |
604 | case TYPE_CODE_FLT: | |
605 | return 1; | |
606 | ||
607 | default: | |
608 | return 0; | |
609 | } | |
610 | } | |
611 | ||
612 | /* Returns non-zero if the value is a character type */ | |
613 | int | |
614 | character_type (type) | |
615 | struct type *type; | |
616 | { | |
617 | switch(current_language->la_language) | |
618 | { | |
619 | case language_m2: | |
620 | return TYPE_CODE(type) != TYPE_CODE_CHAR ? 0 : 1; | |
621 | ||
622 | case language_c: | |
545af6ce | 623 | case language_cplus: |
c8023e66 JG |
624 | return (TYPE_CODE(type) == TYPE_CODE_INT) && |
625 | TYPE_LENGTH(type) == sizeof(char) | |
626 | ? 1 : 0; | |
627 | } | |
7ed0f002 | 628 | return (0); |
c8023e66 JG |
629 | } |
630 | ||
631 | /* Returns non-zero if the value is a boolean type */ | |
632 | int | |
633 | boolean_type (type) | |
634 | struct type *type; | |
635 | { | |
636 | switch(current_language->la_language) | |
637 | { | |
638 | case language_m2: | |
639 | return TYPE_CODE(type) != TYPE_CODE_BOOL ? 0 : 1; | |
640 | ||
641 | case language_c: | |
545af6ce | 642 | case language_cplus: |
c8023e66 JG |
643 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; |
644 | } | |
7ed0f002 | 645 | return (0); |
c8023e66 JG |
646 | } |
647 | ||
648 | /* Returns non-zero if the value is a floating-point type */ | |
649 | int | |
650 | float_type (type) | |
651 | struct type *type; | |
652 | { | |
653 | return TYPE_CODE(type) == TYPE_CODE_FLT; | |
654 | } | |
655 | ||
656 | /* Returns non-zero if the value is a pointer type */ | |
657 | int | |
658 | pointer_type(type) | |
659 | struct type *type; | |
660 | { | |
661 | return TYPE_CODE(type) == TYPE_CODE_PTR || | |
662 | TYPE_CODE(type) == TYPE_CODE_REF; | |
663 | } | |
664 | ||
665 | /* Returns non-zero if the value is a structured type */ | |
666 | int | |
667 | structured_type(type) | |
668 | struct type *type; | |
669 | { | |
670 | switch(current_language->la_language) | |
671 | { | |
672 | case language_c: | |
545af6ce | 673 | case language_cplus: |
c8023e66 JG |
674 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || |
675 | (TYPE_CODE(type) == TYPE_CODE_UNION) || | |
676 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
677 | case language_m2: | |
678 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || | |
679 | (TYPE_CODE(type) == TYPE_CODE_SET) || | |
680 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
681 | } | |
7ed0f002 | 682 | return (0); |
c8023e66 JG |
683 | } |
684 | \f | |
685 | /* This page contains functions that return info about | |
686 | (struct value) values used in GDB. */ | |
687 | ||
688 | /* Returns non-zero if the value VAL represents a true value. */ | |
689 | int | |
690 | value_true(val) | |
691 | value val; | |
692 | { | |
693 | int len, i; | |
694 | struct type *type; | |
695 | LONGEST v; | |
696 | ||
697 | switch (current_language->la_language) { | |
698 | ||
699 | case language_c: | |
545af6ce | 700 | case language_cplus: |
c8023e66 JG |
701 | return !value_zerop (val); |
702 | ||
703 | case language_m2: | |
704 | type = VALUE_TYPE(val); | |
705 | if (TYPE_CODE (type) != TYPE_CODE_BOOL) | |
706 | return 0; /* Not a BOOLEAN at all */ | |
707 | /* Search the fields for one that matches the current value. */ | |
708 | len = TYPE_NFIELDS (type); | |
709 | v = value_as_long (val); | |
710 | for (i = 0; i < len; i++) | |
711 | { | |
712 | QUIT; | |
713 | if (v == TYPE_FIELD_BITPOS (type, i)) | |
714 | break; | |
715 | } | |
716 | if (i >= len) | |
717 | return 0; /* Not a valid BOOLEAN value */ | |
718 | if (!strcmp ("TRUE", TYPE_FIELD_NAME(VALUE_TYPE(val), i))) | |
719 | return 1; /* BOOLEAN with value TRUE */ | |
720 | else | |
721 | return 0; /* BOOLEAN with value FALSE */ | |
722 | break; | |
723 | ||
724 | default: | |
725 | error ("Language not supported."); | |
726 | } | |
727 | } | |
728 | \f | |
729 | /* Returns non-zero if the operator OP is defined on | |
730 | the values ARG1 and ARG2. */ | |
7ed0f002 JG |
731 | |
732 | #if 0 /* Currently unused */ | |
733 | ||
c8023e66 JG |
734 | void |
735 | binop_type_check(arg1,arg2,op) | |
736 | value arg1,arg2; | |
737 | int op; | |
738 | { | |
739 | struct type *t1, *t2; | |
740 | ||
741 | /* If we're not checking types, always return success. */ | |
742 | if (!STRICT_TYPE) | |
743 | return; | |
744 | ||
745 | t1=VALUE_TYPE(arg1); | |
746 | if (arg2!=(value)NULL) | |
747 | t2=VALUE_TYPE(arg2); | |
748 | else | |
749 | t2=NULL; | |
750 | ||
751 | switch(op) | |
752 | { | |
753 | case BINOP_ADD: | |
754 | case BINOP_SUB: | |
755 | if ((numeric_type(t1) && pointer_type(t2)) || | |
756 | (pointer_type(t1) && numeric_type(t2))) | |
757 | { | |
758 | printf("warning: combining pointer and integer.\n"); | |
759 | break; | |
760 | } | |
761 | case BINOP_MUL: | |
762 | case BINOP_LSH: | |
763 | case BINOP_RSH: | |
764 | if (!numeric_type(t1) || !numeric_type(t2)) | |
765 | type_op_error ("Arguments to %s must be numbers.",op); | |
766 | else if (!same_type(t1,t2)) | |
767 | type_op_error ("Arguments to %s must be of the same type.",op); | |
768 | break; | |
769 | ||
770 | case BINOP_AND: | |
771 | case BINOP_OR: | |
772 | if (!boolean_type(t1) || !boolean_type(t2)) | |
773 | type_op_error ("Arguments to %s must be of boolean type.",op); | |
774 | break; | |
775 | ||
776 | case BINOP_EQUAL: | |
777 | if ((pointer_type(t1) && !(pointer_type(t2) || integral_type(t2))) || | |
778 | (pointer_type(t2) && !(pointer_type(t1) || integral_type(t1)))) | |
779 | type_op_error ("A pointer can only be compared to an integer or pointer.",op); | |
780 | else if ((pointer_type(t1) && integral_type(t2)) || | |
781 | (integral_type(t1) && pointer_type(t2))) | |
782 | { | |
783 | printf("warning: combining integer and pointer.\n"); | |
784 | break; | |
785 | } | |
786 | else if (!simple_type(t1) || !simple_type(t2)) | |
787 | type_op_error ("Arguments to %s must be of simple type.",op); | |
788 | else if (!same_type(t1,t2)) | |
789 | type_op_error ("Arguments to %s must be of the same type.",op); | |
790 | break; | |
791 | ||
792 | case BINOP_REM: | |
793 | if (!integral_type(t1) || !integral_type(t2)) | |
794 | type_op_error ("Arguments to %s must be of integral type.",op); | |
795 | break; | |
796 | ||
797 | case BINOP_LESS: | |
798 | case BINOP_GTR: | |
799 | case BINOP_LEQ: | |
800 | case BINOP_GEQ: | |
801 | if (!ordered_type(t1) || !ordered_type(t2)) | |
802 | type_op_error ("Arguments to %s must be of ordered type.",op); | |
803 | else if (!same_type(t1,t2)) | |
804 | type_op_error ("Arguments to %s must be of the same type.",op); | |
805 | break; | |
806 | ||
807 | case BINOP_ASSIGN: | |
808 | if (pointer_type(t1) && !integral_type(t2)) | |
809 | type_op_error ("A pointer can only be assigned an integer.",op); | |
810 | else if (pointer_type(t1) && integral_type(t2)) | |
811 | { | |
812 | printf("warning: combining integer and pointer."); | |
813 | break; | |
814 | } | |
815 | else if (!simple_type(t1) || !simple_type(t2)) | |
816 | type_op_error ("Arguments to %s must be of simple type.",op); | |
817 | else if (!same_type(t1,t2)) | |
818 | type_op_error ("Arguments to %s must be of the same type.",op); | |
819 | break; | |
820 | ||
821 | /* Unary checks -- arg2 is null */ | |
822 | ||
823 | case UNOP_ZEROP: | |
824 | if (!boolean_type(t1)) | |
825 | type_op_error ("Argument to %s must be of boolean type.",op); | |
826 | break; | |
827 | ||
828 | case UNOP_PLUS: | |
829 | case UNOP_NEG: | |
830 | if (!numeric_type(t1)) | |
831 | type_op_error ("Argument to %s must be of numeric type.",op); | |
832 | break; | |
833 | ||
834 | case UNOP_IND: | |
835 | if (integral_type(t1)) | |
836 | { | |
837 | printf("warning: combining pointer and integer.\n"); | |
838 | break; | |
839 | } | |
840 | else if (!pointer_type(t1)) | |
841 | type_op_error ("Argument to %s must be a pointer.",op); | |
842 | break; | |
843 | ||
844 | case UNOP_PREINCREMENT: | |
845 | case UNOP_POSTINCREMENT: | |
846 | case UNOP_PREDECREMENT: | |
847 | case UNOP_POSTDECREMENT: | |
848 | if (!ordered_type(t1)) | |
849 | type_op_error ("Argument to %s must be of an ordered type.",op); | |
850 | break; | |
851 | ||
852 | default: | |
853 | /* Ok. The following operators have different meanings in | |
854 | different languages. */ | |
855 | switch(current_language->la_language) | |
856 | { | |
857 | #ifdef _LANG_c | |
858 | case language_c: | |
545af6ce | 859 | case language_cplus: |
c8023e66 JG |
860 | switch(op) |
861 | { | |
862 | case BINOP_DIV: | |
863 | if (!numeric_type(t1) || !numeric_type(t2)) | |
864 | type_op_error ("Arguments to %s must be numbers.",op); | |
865 | break; | |
866 | } | |
867 | break; | |
868 | #endif | |
869 | ||
870 | #ifdef _LANG_m2 | |
871 | case language_m2: | |
872 | switch(op) | |
873 | { | |
874 | case BINOP_DIV: | |
875 | if (!float_type(t1) || !float_type(t2)) | |
876 | type_op_error ("Arguments to %s must be floating point numbers.",op); | |
877 | break; | |
878 | case BINOP_INTDIV: | |
879 | if (!integral_type(t1) || !integral_type(t2)) | |
880 | type_op_error ("Arguments to %s must be of integral type.",op); | |
881 | break; | |
882 | } | |
883 | #endif | |
884 | } | |
885 | } | |
886 | } | |
7ed0f002 JG |
887 | |
888 | #endif /* 0 */ | |
889 | ||
c8023e66 JG |
890 | \f |
891 | /* This page contains functions for the printing out of | |
892 | error messages that occur during type- and range- | |
893 | checking. */ | |
894 | ||
895 | /* Prints the format string FMT with the operator as a string | |
896 | corresponding to the opcode OP. If FATAL is non-zero, then | |
897 | this is an error and error () is called. Otherwise, it is | |
898 | a warning and printf() is called. */ | |
899 | void | |
900 | op_error (fmt,op,fatal) | |
901 | char *fmt; | |
902 | enum exp_opcode op; | |
903 | int fatal; | |
904 | { | |
905 | if (fatal) | |
906 | error (fmt,op_string(op)); | |
907 | else | |
908 | { | |
909 | printf("warning: "); | |
910 | printf(fmt,op_string(op)); | |
911 | printf("\n"); | |
912 | } | |
913 | } | |
914 | ||
915 | /* These are called when a language fails a type- or range-check. | |
916 | The first argument should be a printf()-style format string, and | |
917 | the rest of the arguments should be its arguments. If | |
918 | [type|range]_check is [type|range]_check_on, then return_to_top_level() | |
919 | is called in the style of error (). Otherwise, the message is prefixed | |
920 | by "warning: " and we do not return to the top level. */ | |
7ed0f002 | 921 | |
c8023e66 JG |
922 | void |
923 | type_error (va_alist) | |
7ed0f002 | 924 | va_dcl |
c8023e66 JG |
925 | { |
926 | va_list args; | |
927 | char *string; | |
928 | ||
929 | if (type_check==type_check_warn) | |
930 | fprintf(stderr,"warning: "); | |
931 | else | |
932 | target_terminal_ours(); | |
933 | ||
934 | va_start (args); | |
935 | string = va_arg (args, char *); | |
936 | vfprintf (stderr, string, args); | |
937 | fprintf (stderr, "\n"); | |
938 | va_end (args); | |
939 | if (type_check==type_check_on) | |
940 | return_to_top_level(); | |
941 | } | |
942 | ||
943 | void | |
944 | range_error (va_alist) | |
7ed0f002 | 945 | va_dcl |
c8023e66 JG |
946 | { |
947 | va_list args; | |
948 | char *string; | |
949 | ||
950 | if (range_check==range_check_warn) | |
951 | fprintf(stderr,"warning: "); | |
952 | else | |
953 | target_terminal_ours(); | |
954 | ||
955 | va_start (args); | |
956 | string = va_arg (args, char *); | |
957 | vfprintf (stderr, string, args); | |
958 | fprintf (stderr, "\n"); | |
959 | va_end (args); | |
960 | if (range_check==range_check_on) | |
961 | return_to_top_level(); | |
962 | } | |
963 | ||
964 | \f | |
965 | /* This page contains miscellaneous functions */ | |
966 | ||
967 | /* Return the language as a string */ | |
968 | char * | |
969 | language_str(lang) | |
970 | enum language lang; | |
971 | { | |
972 | int i; | |
973 | ||
974 | for (i = 0; i < languages_size; i++) { | |
975 | if (languages[i]->la_language == lang) { | |
976 | return languages[i]->la_name; | |
977 | } | |
978 | } | |
979 | return "Unknown"; | |
980 | } | |
981 | ||
982 | struct cmd_list_element *setchecklist = NULL; | |
983 | struct cmd_list_element *showchecklist = NULL; | |
984 | ||
985 | static void | |
d8ce1326 JG |
986 | set_check (ignore, from_tty) |
987 | char *ignore; | |
c8023e66 JG |
988 | int from_tty; |
989 | { | |
990 | printf( | |
991 | "\"set check\" must be followed by the name of a check subcommand.\n"); | |
992 | help_list(setchecklist, "set check ", -1, stdout); | |
993 | } | |
994 | ||
995 | static void | |
996 | show_check (arg, from_tty) | |
997 | char *arg; | |
998 | int from_tty; | |
999 | { | |
1000 | cmd_show_list(showchecklist, from_tty, ""); | |
1001 | } | |
1002 | \f | |
1003 | /* Add a language to the set of known languages. */ | |
1004 | ||
1005 | void | |
1006 | add_language (lang) | |
7ed0f002 | 1007 | const struct language_defn *lang; |
c8023e66 JG |
1008 | { |
1009 | if (lang->la_magic != LANG_MAGIC) | |
1010 | { | |
1011 | fprintf(stderr, "Magic number of %s language struct wrong\n", | |
1012 | lang->la_name); | |
1013 | abort(); | |
1014 | } | |
1015 | ||
1016 | if (!languages) | |
1017 | { | |
1018 | languages_allocsize = DEFAULT_ALLOCSIZE; | |
7ed0f002 | 1019 | languages = (const struct language_defn **) xmalloc |
c8023e66 JG |
1020 | (languages_allocsize * sizeof (*languages)); |
1021 | } | |
1022 | if (languages_size >= languages_allocsize) | |
1023 | { | |
1024 | languages_allocsize *= 2; | |
7ed0f002 | 1025 | languages = (const struct language_defn **) xrealloc ((char *) languages, |
c8023e66 JG |
1026 | languages_allocsize * sizeof (*languages)); |
1027 | } | |
1028 | languages[languages_size++] = lang; | |
c8023e66 JG |
1029 | } |
1030 | ||
1031 | /* Define the language that is no language. */ | |
1032 | ||
7ed0f002 | 1033 | static int |
c8023e66 JG |
1034 | unk_lang_parser () |
1035 | { | |
1036 | return 1; | |
1037 | } | |
1038 | ||
7ed0f002 JG |
1039 | static void |
1040 | unk_lang_error (msg) | |
1041 | char *msg; | |
c8023e66 JG |
1042 | { |
1043 | error ("Attempted to parse an expression with unknown language"); | |
1044 | } | |
1045 | ||
1046 | static struct type ** const (unknown_builtin_types[]) = { 0 }; | |
1047 | static const struct op_print unk_op_print_tab[] = { 0 }; | |
1048 | ||
1049 | const struct language_defn unknown_language_defn = { | |
1050 | "unknown", | |
1051 | language_unknown, | |
1052 | &unknown_builtin_types[0], | |
1053 | range_check_off, | |
1054 | type_check_off, | |
1055 | unk_lang_parser, | |
1056 | unk_lang_error, | |
1057 | &builtin_type_error, /* longest signed integral type */ | |
1058 | &builtin_type_error, /* longest unsigned integral type */ | |
1059 | &builtin_type_error, /* longest floating point type */ | |
1060 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1061 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1062 | unk_op_print_tab, /* expression operators for printing */ | |
1063 | LANG_MAGIC | |
1064 | }; | |
1065 | ||
1066 | /* These two structs define fake entries for the "local" and "auto" options. */ | |
1067 | const struct language_defn auto_language_defn = { | |
1068 | "auto", | |
1069 | language_auto, | |
1070 | &unknown_builtin_types[0], | |
1071 | range_check_off, | |
1072 | type_check_off, | |
1073 | unk_lang_parser, | |
1074 | unk_lang_error, | |
1075 | &builtin_type_error, /* longest signed integral type */ | |
1076 | &builtin_type_error, /* longest unsigned integral type */ | |
1077 | &builtin_type_error, /* longest floating point type */ | |
1078 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1079 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1080 | unk_op_print_tab, /* expression operators for printing */ | |
1081 | LANG_MAGIC | |
1082 | }; | |
1083 | ||
1084 | const struct language_defn local_language_defn = { | |
1085 | "local", | |
1086 | language_auto, | |
1087 | &unknown_builtin_types[0], | |
1088 | range_check_off, | |
1089 | type_check_off, | |
1090 | unk_lang_parser, | |
1091 | unk_lang_error, | |
1092 | &builtin_type_error, /* longest signed integral type */ | |
1093 | &builtin_type_error, /* longest unsigned integral type */ | |
1094 | &builtin_type_error, /* longest floating point type */ | |
1095 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1096 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1097 | unk_op_print_tab, /* expression operators for printing */ | |
1098 | LANG_MAGIC | |
1099 | }; | |
1100 | \f | |
1101 | /* Initialize the language routines */ | |
1102 | ||
1103 | void | |
1104 | _initialize_language() | |
1105 | { | |
1106 | struct cmd_list_element *set, *show; | |
1107 | ||
1108 | /* GDB commands for language specific stuff */ | |
1109 | ||
1110 | set = add_set_cmd ("language", class_support, var_string_noescape, | |
1111 | (char *)&language, | |
0b798409 | 1112 | "Set the current source language.", |
c8023e66 JG |
1113 | &setlist); |
1114 | show = add_show_from_set (set, &showlist); | |
1ab3bf1b JG |
1115 | set->function.cfunc = set_language_command; |
1116 | show->function.cfunc = show_language_command; | |
c8023e66 JG |
1117 | |
1118 | add_prefix_cmd ("check", no_class, set_check, | |
1119 | "Set the status of the type/range checker", | |
1120 | &setchecklist, "set check ", 0, &setlist); | |
1121 | add_alias_cmd ("c", "check", no_class, 1, &setlist); | |
1122 | add_alias_cmd ("ch", "check", no_class, 1, &setlist); | |
1123 | ||
1124 | add_prefix_cmd ("check", no_class, show_check, | |
1125 | "Show the status of the type/range checker", | |
7cb83757 | 1126 | &showchecklist, "show check ", 0, &showlist); |
c8023e66 JG |
1127 | add_alias_cmd ("c", "check", no_class, 1, &showlist); |
1128 | add_alias_cmd ("ch", "check", no_class, 1, &showlist); | |
1129 | ||
1130 | set = add_set_cmd ("type", class_support, var_string_noescape, | |
1131 | (char *)&type, | |
7cb83757 | 1132 | "Set type checking. (on/warn/off/auto)", |
c8023e66 JG |
1133 | &setchecklist); |
1134 | show = add_show_from_set (set, &showchecklist); | |
1ab3bf1b JG |
1135 | set->function.cfunc = set_type_command; |
1136 | show->function.cfunc = show_type_command; | |
c8023e66 JG |
1137 | |
1138 | set = add_set_cmd ("range", class_support, var_string_noescape, | |
1139 | (char *)&range, | |
7cb83757 | 1140 | "Set range checking. (on/warn/off/auto)", |
c8023e66 JG |
1141 | &setchecklist); |
1142 | show = add_show_from_set (set, &showchecklist); | |
1ab3bf1b JG |
1143 | set->function.cfunc = set_range_command; |
1144 | show->function.cfunc = show_range_command; | |
c8023e66 JG |
1145 | |
1146 | add_language (&unknown_language_defn); | |
1147 | add_language (&local_language_defn); | |
1148 | add_language (&auto_language_defn); | |
1149 | ||
1150 | language = savestring ("auto",strlen("auto")); | |
1151 | range = savestring ("auto",strlen("auto")); | |
1152 | type = savestring ("auto",strlen("auto")); | |
1153 | ||
1154 | /* Have the above take effect */ | |
1155 | ||
5f3d478e | 1156 | set_language_command (language, 0); |
c8023e66 JG |
1157 | set_type_command (NULL, 0); |
1158 | set_range_command (NULL, 0); | |
1159 | } |