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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; |
318bf84f | 88 | extern char *warning_pre_print; |
7ed0f002 | 89 | |
c8023e66 JG |
90 | /* The current (default at startup) state of type and range checking. |
91 | (If the modes are set to "auto", though, these are changed based | |
92 | on the default language at startup, and then again based on the | |
93 | language of the first source file. */ | |
94 | ||
95 | enum range_mode range_mode = range_mode_auto; | |
96 | enum range_check range_check = range_check_off; | |
97 | enum type_mode type_mode = type_mode_auto; | |
98 | enum type_check type_check = type_check_off; | |
99 | ||
100 | /* The current language and language_mode (see language.h) */ | |
101 | ||
0c6efbcc | 102 | const struct language_defn *current_language = &unknown_language_defn; |
c8023e66 JG |
103 | enum language_mode language_mode = language_mode_auto; |
104 | ||
105 | /* The list of supported languages. The list itself is malloc'd. */ | |
106 | ||
7ed0f002 | 107 | static const struct language_defn **languages; |
c8023e66 JG |
108 | static unsigned languages_size; |
109 | static unsigned languages_allocsize; | |
110 | #define DEFAULT_ALLOCSIZE 3 | |
111 | ||
112 | /* The "set language/type/range" commands all put stuff in these | |
113 | buffers. This is to make them work as set/show commands. The | |
114 | user's string is copied here, then the set_* commands look at | |
115 | them and update them to something that looks nice when it is | |
116 | printed out. */ | |
117 | ||
118 | static char *language; | |
119 | static char *type; | |
120 | static char *range; | |
121 | ||
122 | /* Warning issued when current_language and the language of the current | |
123 | frame do not match. */ | |
124 | char lang_frame_mismatch_warn[] = | |
125 | "Warning: the current language does not match this frame."; | |
126 | ||
c8023e66 JG |
127 | \f |
128 | /* This page contains the functions corresponding to GDB commands | |
129 | and their helpers. */ | |
130 | ||
131 | /* Show command. Display a warning if the language set | |
132 | does not match the frame. */ | |
7ed0f002 | 133 | static void |
d8ce1326 JG |
134 | show_language_command (ignore, from_tty) |
135 | char *ignore; | |
c8023e66 JG |
136 | int from_tty; |
137 | { | |
138 | enum language flang; /* The language of the current frame */ | |
139 | ||
140 | flang = get_frame_language(); | |
141 | if (flang != language_unknown && | |
142 | language_mode == language_mode_manual && | |
143 | current_language->la_language != flang) | |
144 | printf_filtered("%s\n",lang_frame_mismatch_warn); | |
145 | } | |
146 | ||
147 | /* Set command. Change the current working language. */ | |
7ed0f002 | 148 | static void |
d8ce1326 JG |
149 | set_language_command (ignore, from_tty) |
150 | char *ignore; | |
c8023e66 JG |
151 | int from_tty; |
152 | { | |
153 | int i; | |
154 | enum language flang; | |
5f3d478e | 155 | char *err_lang; |
c8023e66 JG |
156 | |
157 | /* FIXME -- do this from the list, with HELP. */ | |
158 | if (!language || !language[0]) { | |
159 | printf("The currently understood settings are:\n\n\ | |
160 | local or auto Automatic setting based on source file\n\ | |
0b798409 | 161 | c Use the C language\n\ |
545af6ce | 162 | c++ Use the C++ language\n\ |
0b798409 JG |
163 | modula-2 Use the Modula-2 language\n"); |
164 | /* Restore the silly string. */ | |
165 | set_language(current_language->la_language); | |
c8023e66 JG |
166 | return; |
167 | } | |
168 | ||
169 | /* Search the list of languages for a match. */ | |
170 | for (i = 0; i < languages_size; i++) { | |
171 | if (!strcmp (languages[i]->la_name, language)) { | |
172 | /* Found it! Go into manual mode, and use this language. */ | |
173 | if (languages[i]->la_language == language_auto) { | |
174 | /* Enter auto mode. Set to the current frame's language, if known. */ | |
175 | language_mode = language_mode_auto; | |
176 | flang = get_frame_language(); | |
177 | if (flang!=language_unknown) | |
178 | set_language(flang); | |
179 | return; | |
180 | } else { | |
181 | /* Enter manual mode. Set the specified language. */ | |
182 | language_mode = language_mode_manual; | |
183 | current_language = languages[i]; | |
184 | set_type_range (); | |
185 | set_lang_str(); | |
186 | return; | |
187 | } | |
188 | } | |
189 | } | |
190 | ||
5f3d478e JG |
191 | /* Reset the language (esp. the global string "language") to the |
192 | correct values. */ | |
193 | err_lang=savestring(language,strlen(language)); | |
194 | make_cleanup (free, err_lang); /* Free it after error */ | |
195 | set_language(current_language->la_language); | |
196 | error ("Unknown language `%s'.",err_lang); | |
c8023e66 JG |
197 | } |
198 | ||
199 | /* Show command. Display a warning if the type setting does | |
200 | not match the current language. */ | |
7ed0f002 | 201 | static void |
d8ce1326 JG |
202 | show_type_command(ignore, from_tty) |
203 | char *ignore; | |
c8023e66 JG |
204 | int from_tty; |
205 | { | |
206 | if (type_check != current_language->la_type_check) | |
207 | printf( | |
208 | "Warning: the current type check setting does not match the language.\n"); | |
209 | } | |
210 | ||
211 | /* Set command. Change the setting for type checking. */ | |
7ed0f002 | 212 | static void |
d8ce1326 JG |
213 | set_type_command(ignore, from_tty) |
214 | char *ignore; | |
c8023e66 JG |
215 | int from_tty; |
216 | { | |
217 | if (!strcmp(type,"on")) | |
218 | { | |
219 | type_check = type_check_on; | |
220 | type_mode = type_mode_manual; | |
221 | } | |
222 | else if (!strcmp(type,"warn")) | |
223 | { | |
224 | type_check = type_check_warn; | |
225 | type_mode = type_mode_manual; | |
226 | } | |
227 | else if (!strcmp(type,"off")) | |
228 | { | |
229 | type_check = type_check_off; | |
230 | type_mode = type_mode_manual; | |
231 | } | |
232 | else if (!strcmp(type,"auto")) | |
233 | { | |
234 | type_mode = type_mode_auto; | |
235 | set_type_range(); | |
236 | /* Avoid hitting the set_type_str call below. We | |
237 | did it in set_type_range. */ | |
238 | return; | |
239 | } | |
240 | set_type_str(); | |
d8ce1326 | 241 | show_type_command((char *)NULL, from_tty); |
c8023e66 JG |
242 | } |
243 | ||
244 | /* Show command. Display a warning if the range setting does | |
245 | not match the current language. */ | |
7ed0f002 | 246 | static void |
d8ce1326 JG |
247 | show_range_command(ignore, from_tty) |
248 | char *ignore; | |
c8023e66 JG |
249 | int from_tty; |
250 | { | |
251 | ||
252 | if (range_check != current_language->la_range_check) | |
253 | printf( | |
254 | "Warning: the current range check setting does not match the language.\n"); | |
255 | } | |
256 | ||
257 | /* Set command. Change the setting for range checking. */ | |
7ed0f002 | 258 | static void |
d8ce1326 JG |
259 | set_range_command(ignore, from_tty) |
260 | char *ignore; | |
c8023e66 JG |
261 | int from_tty; |
262 | { | |
263 | if (!strcmp(range,"on")) | |
264 | { | |
265 | range_check = range_check_on; | |
266 | range_mode = range_mode_manual; | |
267 | } | |
268 | else if (!strcmp(range,"warn")) | |
269 | { | |
270 | range_check = range_check_warn; | |
271 | range_mode = range_mode_manual; | |
272 | } | |
273 | else if (!strcmp(range,"off")) | |
274 | { | |
275 | range_check = range_check_off; | |
276 | range_mode = range_mode_manual; | |
277 | } | |
278 | else if (!strcmp(range,"auto")) | |
279 | { | |
280 | range_mode = range_mode_auto; | |
281 | set_type_range(); | |
282 | /* Avoid hitting the set_range_str call below. We | |
283 | did it in set_type_range. */ | |
284 | return; | |
285 | } | |
286 | set_range_str(); | |
d8ce1326 | 287 | show_range_command((char *)0, from_tty); |
c8023e66 JG |
288 | } |
289 | ||
290 | /* Set the status of range and type checking based on | |
291 | the current modes and the current language. | |
292 | If SHOW is non-zero, then print out the current language, | |
293 | type and range checking status. */ | |
294 | static void | |
295 | set_type_range() | |
296 | { | |
c8023e66 JG |
297 | |
298 | if (range_mode == range_mode_auto) | |
299 | range_check = current_language->la_range_check; | |
300 | ||
301 | if (type_mode == type_mode_auto) | |
302 | type_check = current_language->la_type_check; | |
303 | ||
304 | set_type_str(); | |
305 | set_range_str(); | |
306 | } | |
307 | ||
308 | /* Set current language to (enum language) LANG. */ | |
309 | ||
310 | void | |
311 | set_language(lang) | |
312 | enum language lang; | |
313 | { | |
314 | int i; | |
315 | ||
316 | for (i = 0; i < languages_size; i++) { | |
317 | if (languages[i]->la_language == lang) { | |
318 | current_language = languages[i]; | |
319 | set_type_range (); | |
320 | set_lang_str(); | |
545af6ce | 321 | break; |
c8023e66 JG |
322 | } |
323 | } | |
324 | } | |
325 | \f | |
326 | /* This page contains functions that update the global vars | |
327 | language, type and range. */ | |
7ed0f002 | 328 | static void |
c8023e66 JG |
329 | set_lang_str() |
330 | { | |
d8ce1326 | 331 | char *prefix = ""; |
c8023e66 JG |
332 | |
333 | free (language); | |
334 | if (language_mode == language_mode_auto) | |
335 | prefix = "auto; currently "; | |
336 | ||
58ae87f6 | 337 | language = concat(prefix, current_language->la_name, NULL); |
c8023e66 JG |
338 | } |
339 | ||
7ed0f002 | 340 | static void |
c8023e66 JG |
341 | set_type_str() |
342 | { | |
343 | char *tmp, *prefix = ""; | |
344 | ||
345 | free (type); | |
346 | if (type_mode==type_mode_auto) | |
347 | prefix = "auto; currently "; | |
348 | ||
349 | switch(type_check) | |
350 | { | |
351 | case type_check_on: | |
352 | tmp = "on"; | |
353 | break; | |
354 | case type_check_off: | |
355 | tmp = "off"; | |
356 | break; | |
357 | case type_check_warn: | |
358 | tmp = "warn"; | |
359 | break; | |
360 | default: | |
361 | error ("Unrecognized type check setting."); | |
362 | } | |
363 | ||
58ae87f6 | 364 | type = concat(prefix,tmp,NULL); |
c8023e66 JG |
365 | } |
366 | ||
7ed0f002 | 367 | static void |
c8023e66 JG |
368 | set_range_str() |
369 | { | |
370 | char *tmp, *pref = ""; | |
371 | ||
372 | free (range); | |
373 | if (range_mode==range_mode_auto) | |
374 | pref = "auto; currently "; | |
375 | ||
376 | switch(range_check) | |
377 | { | |
378 | case range_check_on: | |
379 | tmp = "on"; | |
380 | break; | |
381 | case range_check_off: | |
382 | tmp = "off"; | |
383 | break; | |
384 | case range_check_warn: | |
385 | tmp = "warn"; | |
386 | break; | |
387 | default: | |
388 | error ("Unrecognized range check setting."); | |
389 | } | |
390 | ||
58ae87f6 | 391 | range = concat(pref,tmp,NULL); |
c8023e66 JG |
392 | } |
393 | ||
394 | ||
395 | /* Print out the current language settings: language, range and | |
7ed0f002 | 396 | type checking. If QUIETLY, print only what has changed. */ |
c8023e66 | 397 | void |
7ed0f002 JG |
398 | language_info (quietly) |
399 | int quietly; | |
c8023e66 | 400 | { |
7ed0f002 | 401 | /* FIXME: quietly is ignored at the moment. */ |
c8023e66 | 402 | printf("Current Language: %s\n",language); |
d8ce1326 | 403 | show_language_command((char *)0, 1); |
c8023e66 | 404 | printf("Type checking: %s\n",type); |
d8ce1326 | 405 | show_type_command((char *)0, 1); |
c8023e66 | 406 | printf("Range checking: %s\n",range); |
d8ce1326 | 407 | show_range_command((char *)0, 1); |
c8023e66 JG |
408 | } |
409 | \f | |
410 | /* Return the result of a binary operation. */ | |
7ed0f002 JG |
411 | |
412 | #if 0 /* Currently unused */ | |
413 | ||
c8023e66 JG |
414 | struct type * |
415 | binop_result_type(v1,v2) | |
416 | value v1,v2; | |
417 | { | |
418 | int l1,l2,size,uns; | |
419 | ||
d8ce1326 JG |
420 | l1 = TYPE_LENGTH(VALUE_TYPE(v1)); |
421 | l2 = TYPE_LENGTH(VALUE_TYPE(v2)); | |
c8023e66 JG |
422 | |
423 | switch(current_language->la_language) | |
424 | { | |
425 | case language_c: | |
545af6ce | 426 | case language_cplus: |
c8023e66 JG |
427 | if (TYPE_CODE(VALUE_TYPE(v1))==TYPE_CODE_FLT) |
428 | return TYPE_CODE(VALUE_TYPE(v2)) == TYPE_CODE_FLT && l2 > l1 ? | |
429 | VALUE_TYPE(v2) : VALUE_TYPE(v1); | |
430 | else if (TYPE_CODE(VALUE_TYPE(v2))==TYPE_CODE_FLT) | |
431 | return TYPE_CODE(VALUE_TYPE(v1)) == TYPE_CODE_FLT && l1 > l2 ? | |
432 | VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
433 | else if (TYPE_UNSIGNED(VALUE_TYPE(v1)) && l1 > l2) | |
434 | return VALUE_TYPE(v1); | |
435 | else if (TYPE_UNSIGNED(VALUE_TYPE(v2)) && l2 > l1) | |
436 | return VALUE_TYPE(v2); | |
437 | else /* Both are signed. Result is the longer type */ | |
438 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
439 | break; | |
440 | case language_m2: | |
441 | /* If we are doing type-checking, l1 should equal l2, so this is | |
442 | not needed. */ | |
443 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); | |
444 | break; | |
445 | } | |
d8ce1326 JG |
446 | abort(); |
447 | return (struct type *)0; /* For lint */ | |
c8023e66 | 448 | } |
7ed0f002 JG |
449 | |
450 | #endif /* 0 */ | |
451 | ||
c8023e66 JG |
452 | \f |
453 | /* This page contains functions that return format strings for | |
454 | printf for printing out numbers in different formats */ | |
455 | ||
456 | /* Returns the appropriate printf format for hexadecimal | |
457 | numbers. */ | |
458 | char * | |
459 | local_hex_format_custom(pre) | |
460 | char *pre; | |
461 | { | |
462 | static char form[50]; | |
463 | ||
464 | strcpy (form, current_language->la_hex_format_pre); | |
465 | strcat (form, pre); | |
466 | strcat (form, current_language->la_hex_format_suf); | |
467 | return form; | |
468 | } | |
469 | ||
470 | /* Converts a number to hexadecimal and stores it in a static | |
471 | string. Returns a pointer to this string. */ | |
472 | char * | |
473 | local_hex_string (num) | |
474 | int num; | |
475 | { | |
476 | static char res[50]; | |
477 | ||
478 | sprintf (res, current_language->la_hex_format, num); | |
479 | return res; | |
480 | } | |
481 | ||
482 | /* Converts a number to custom hexadecimal and stores it in a static | |
483 | string. Returns a pointer to this string. */ | |
484 | char * | |
485 | local_hex_string_custom(num,pre) | |
486 | int num; | |
487 | char *pre; | |
488 | { | |
489 | static char res[50]; | |
490 | ||
491 | sprintf (res, local_hex_format_custom(pre), num); | |
492 | return res; | |
493 | } | |
494 | ||
495 | /* Returns the appropriate printf format for octal | |
496 | numbers. */ | |
497 | char * | |
498 | local_octal_format_custom(pre) | |
499 | char *pre; | |
500 | { | |
501 | static char form[50]; | |
502 | ||
503 | strcpy (form, current_language->la_octal_format_pre); | |
504 | strcat (form, pre); | |
505 | strcat (form, current_language->la_octal_format_suf); | |
506 | return form; | |
507 | } | |
508 | \f | |
509 | /* This page contains functions that are used in type/range checking. | |
510 | They all return zero if the type/range check fails. | |
511 | ||
512 | It is hoped that these will make extending GDB to parse different | |
513 | languages a little easier. These are primarily used in eval.c when | |
514 | evaluating expressions and making sure that their types are correct. | |
515 | Instead of having a mess of conjucted/disjuncted expressions in an "if", | |
516 | the ideas of type can be wrapped up in the following functions. | |
517 | ||
518 | Note that some of them are not currently dependent upon which language | |
519 | is currently being parsed. For example, floats are the same in | |
520 | C and Modula-2 (ie. the only floating point type has TYPE_CODE of | |
521 | TYPE_CODE_FLT), while booleans are different. */ | |
522 | ||
523 | /* Returns non-zero if its argument is a simple type. This is the same for | |
524 | both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur, | |
525 | and thus will never cause the failure of the test. */ | |
526 | int | |
527 | simple_type(type) | |
528 | struct type *type; | |
529 | { | |
530 | switch (TYPE_CODE (type)) { | |
531 | case TYPE_CODE_INT: | |
532 | case TYPE_CODE_CHAR: | |
533 | case TYPE_CODE_ENUM: | |
534 | case TYPE_CODE_FLT: | |
535 | case TYPE_CODE_RANGE: | |
536 | case TYPE_CODE_BOOL: | |
537 | return 1; | |
538 | ||
539 | default: | |
540 | return 0; | |
541 | } | |
542 | } | |
543 | ||
544 | /* Returns non-zero if its argument is of an ordered type. */ | |
545 | int | |
546 | ordered_type (type) | |
547 | struct type *type; | |
548 | { | |
549 | switch (TYPE_CODE (type)) { | |
550 | case TYPE_CODE_INT: | |
551 | case TYPE_CODE_CHAR: | |
552 | case TYPE_CODE_ENUM: | |
553 | case TYPE_CODE_FLT: | |
554 | case TYPE_CODE_RANGE: | |
555 | return 1; | |
556 | ||
557 | default: | |
558 | return 0; | |
559 | } | |
560 | } | |
561 | ||
562 | /* Returns non-zero if the two types are the same */ | |
563 | int | |
564 | same_type (arg1, arg2) | |
565 | struct type *arg1, *arg2; | |
566 | { | |
567 | if (structured_type(arg1) ? !structured_type(arg2) : structured_type(arg2)) | |
568 | /* One is structured and one isn't */ | |
569 | return 0; | |
570 | else if (structured_type(arg1) && structured_type(arg2)) | |
571 | return arg1 == arg2; | |
572 | else if (numeric_type(arg1) && numeric_type(arg2)) | |
573 | return (TYPE_CODE(arg2) == TYPE_CODE(arg1)) && | |
574 | (TYPE_UNSIGNED(arg1) == TYPE_UNSIGNED(arg2)) | |
575 | ? 1 : 0; | |
576 | else | |
577 | return arg1==arg2; | |
578 | } | |
579 | ||
580 | /* Returns non-zero if the type is integral */ | |
581 | int | |
582 | integral_type (type) | |
583 | struct type *type; | |
584 | { | |
585 | switch(current_language->la_language) | |
586 | { | |
587 | case language_c: | |
545af6ce | 588 | case language_cplus: |
c8023e66 JG |
589 | return (TYPE_CODE(type) != TYPE_CODE_INT) && |
590 | (TYPE_CODE(type) != TYPE_CODE_ENUM) ? 0 : 1; | |
591 | case language_m2: | |
592 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; | |
593 | default: | |
594 | error ("Language not supported."); | |
595 | } | |
596 | } | |
597 | ||
598 | /* Returns non-zero if the value is numeric */ | |
599 | int | |
600 | numeric_type (type) | |
601 | struct type *type; | |
602 | { | |
603 | switch (TYPE_CODE (type)) { | |
604 | case TYPE_CODE_INT: | |
605 | case TYPE_CODE_FLT: | |
606 | return 1; | |
607 | ||
608 | default: | |
609 | return 0; | |
610 | } | |
611 | } | |
612 | ||
613 | /* Returns non-zero if the value is a character type */ | |
614 | int | |
615 | character_type (type) | |
616 | struct type *type; | |
617 | { | |
618 | switch(current_language->la_language) | |
619 | { | |
620 | case language_m2: | |
621 | return TYPE_CODE(type) != TYPE_CODE_CHAR ? 0 : 1; | |
622 | ||
623 | case language_c: | |
545af6ce | 624 | case language_cplus: |
c8023e66 JG |
625 | return (TYPE_CODE(type) == TYPE_CODE_INT) && |
626 | TYPE_LENGTH(type) == sizeof(char) | |
627 | ? 1 : 0; | |
628 | } | |
7ed0f002 | 629 | return (0); |
c8023e66 JG |
630 | } |
631 | ||
632 | /* Returns non-zero if the value is a boolean type */ | |
633 | int | |
634 | boolean_type (type) | |
635 | struct type *type; | |
636 | { | |
637 | switch(current_language->la_language) | |
638 | { | |
639 | case language_m2: | |
640 | return TYPE_CODE(type) != TYPE_CODE_BOOL ? 0 : 1; | |
641 | ||
642 | case language_c: | |
545af6ce | 643 | case language_cplus: |
c8023e66 JG |
644 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; |
645 | } | |
7ed0f002 | 646 | return (0); |
c8023e66 JG |
647 | } |
648 | ||
649 | /* Returns non-zero if the value is a floating-point type */ | |
650 | int | |
651 | float_type (type) | |
652 | struct type *type; | |
653 | { | |
654 | return TYPE_CODE(type) == TYPE_CODE_FLT; | |
655 | } | |
656 | ||
657 | /* Returns non-zero if the value is a pointer type */ | |
658 | int | |
659 | pointer_type(type) | |
660 | struct type *type; | |
661 | { | |
662 | return TYPE_CODE(type) == TYPE_CODE_PTR || | |
663 | TYPE_CODE(type) == TYPE_CODE_REF; | |
664 | } | |
665 | ||
666 | /* Returns non-zero if the value is a structured type */ | |
667 | int | |
668 | structured_type(type) | |
669 | struct type *type; | |
670 | { | |
671 | switch(current_language->la_language) | |
672 | { | |
673 | case language_c: | |
545af6ce | 674 | case language_cplus: |
c8023e66 JG |
675 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || |
676 | (TYPE_CODE(type) == TYPE_CODE_UNION) || | |
677 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
678 | case language_m2: | |
679 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || | |
680 | (TYPE_CODE(type) == TYPE_CODE_SET) || | |
681 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); | |
682 | } | |
7ed0f002 | 683 | return (0); |
c8023e66 JG |
684 | } |
685 | \f | |
686 | /* This page contains functions that return info about | |
687 | (struct value) values used in GDB. */ | |
688 | ||
689 | /* Returns non-zero if the value VAL represents a true value. */ | |
690 | int | |
691 | value_true(val) | |
692 | value val; | |
693 | { | |
694 | int len, i; | |
695 | struct type *type; | |
696 | LONGEST v; | |
697 | ||
698 | switch (current_language->la_language) { | |
699 | ||
700 | case language_c: | |
545af6ce | 701 | case language_cplus: |
c8023e66 JG |
702 | return !value_zerop (val); |
703 | ||
704 | case language_m2: | |
705 | type = VALUE_TYPE(val); | |
706 | if (TYPE_CODE (type) != TYPE_CODE_BOOL) | |
707 | return 0; /* Not a BOOLEAN at all */ | |
708 | /* Search the fields for one that matches the current value. */ | |
709 | len = TYPE_NFIELDS (type); | |
710 | v = value_as_long (val); | |
711 | for (i = 0; i < len; i++) | |
712 | { | |
713 | QUIT; | |
714 | if (v == TYPE_FIELD_BITPOS (type, i)) | |
715 | break; | |
716 | } | |
717 | if (i >= len) | |
718 | return 0; /* Not a valid BOOLEAN value */ | |
719 | if (!strcmp ("TRUE", TYPE_FIELD_NAME(VALUE_TYPE(val), i))) | |
720 | return 1; /* BOOLEAN with value TRUE */ | |
721 | else | |
722 | return 0; /* BOOLEAN with value FALSE */ | |
723 | break; | |
724 | ||
725 | default: | |
726 | error ("Language not supported."); | |
727 | } | |
728 | } | |
729 | \f | |
730 | /* Returns non-zero if the operator OP is defined on | |
731 | the values ARG1 and ARG2. */ | |
7ed0f002 JG |
732 | |
733 | #if 0 /* Currently unused */ | |
734 | ||
c8023e66 JG |
735 | void |
736 | binop_type_check(arg1,arg2,op) | |
737 | value arg1,arg2; | |
738 | int op; | |
739 | { | |
740 | struct type *t1, *t2; | |
741 | ||
742 | /* If we're not checking types, always return success. */ | |
743 | if (!STRICT_TYPE) | |
744 | return; | |
745 | ||
746 | t1=VALUE_TYPE(arg1); | |
747 | if (arg2!=(value)NULL) | |
748 | t2=VALUE_TYPE(arg2); | |
749 | else | |
750 | t2=NULL; | |
751 | ||
752 | switch(op) | |
753 | { | |
754 | case BINOP_ADD: | |
755 | case BINOP_SUB: | |
756 | if ((numeric_type(t1) && pointer_type(t2)) || | |
757 | (pointer_type(t1) && numeric_type(t2))) | |
758 | { | |
318bf84f | 759 | warning ("combining pointer and integer.\n"); |
c8023e66 JG |
760 | break; |
761 | } | |
762 | case BINOP_MUL: | |
763 | case BINOP_LSH: | |
764 | case BINOP_RSH: | |
765 | if (!numeric_type(t1) || !numeric_type(t2)) | |
766 | type_op_error ("Arguments to %s must be numbers.",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 | case BINOP_AND: | |
772 | case BINOP_OR: | |
773 | if (!boolean_type(t1) || !boolean_type(t2)) | |
774 | type_op_error ("Arguments to %s must be of boolean type.",op); | |
775 | break; | |
776 | ||
777 | case BINOP_EQUAL: | |
778 | if ((pointer_type(t1) && !(pointer_type(t2) || integral_type(t2))) || | |
779 | (pointer_type(t2) && !(pointer_type(t1) || integral_type(t1)))) | |
780 | type_op_error ("A pointer can only be compared to an integer or pointer.",op); | |
781 | else if ((pointer_type(t1) && integral_type(t2)) || | |
782 | (integral_type(t1) && pointer_type(t2))) | |
783 | { | |
318bf84f | 784 | warning ("combining integer and pointer.\n"); |
c8023e66 JG |
785 | break; |
786 | } | |
787 | else if (!simple_type(t1) || !simple_type(t2)) | |
788 | type_op_error ("Arguments to %s must be of simple type.",op); | |
789 | else if (!same_type(t1,t2)) | |
790 | type_op_error ("Arguments to %s must be of the same type.",op); | |
791 | break; | |
792 | ||
793 | case BINOP_REM: | |
794 | if (!integral_type(t1) || !integral_type(t2)) | |
795 | type_op_error ("Arguments to %s must be of integral type.",op); | |
796 | break; | |
797 | ||
798 | case BINOP_LESS: | |
799 | case BINOP_GTR: | |
800 | case BINOP_LEQ: | |
801 | case BINOP_GEQ: | |
802 | if (!ordered_type(t1) || !ordered_type(t2)) | |
803 | type_op_error ("Arguments to %s must be of ordered type.",op); | |
804 | else if (!same_type(t1,t2)) | |
805 | type_op_error ("Arguments to %s must be of the same type.",op); | |
806 | break; | |
807 | ||
808 | case BINOP_ASSIGN: | |
809 | if (pointer_type(t1) && !integral_type(t2)) | |
810 | type_op_error ("A pointer can only be assigned an integer.",op); | |
811 | else if (pointer_type(t1) && integral_type(t2)) | |
812 | { | |
318bf84f | 813 | warning ("combining integer and pointer."); |
c8023e66 JG |
814 | break; |
815 | } | |
816 | else if (!simple_type(t1) || !simple_type(t2)) | |
817 | type_op_error ("Arguments to %s must be of simple type.",op); | |
818 | else if (!same_type(t1,t2)) | |
819 | type_op_error ("Arguments to %s must be of the same type.",op); | |
820 | break; | |
821 | ||
822 | /* Unary checks -- arg2 is null */ | |
823 | ||
824 | case UNOP_ZEROP: | |
825 | if (!boolean_type(t1)) | |
826 | type_op_error ("Argument to %s must be of boolean type.",op); | |
827 | break; | |
828 | ||
829 | case UNOP_PLUS: | |
830 | case UNOP_NEG: | |
831 | if (!numeric_type(t1)) | |
832 | type_op_error ("Argument to %s must be of numeric type.",op); | |
833 | break; | |
834 | ||
835 | case UNOP_IND: | |
836 | if (integral_type(t1)) | |
837 | { | |
318bf84f | 838 | warning ("combining pointer and integer.\n"); |
c8023e66 JG |
839 | break; |
840 | } | |
841 | else if (!pointer_type(t1)) | |
842 | type_op_error ("Argument to %s must be a pointer.",op); | |
843 | break; | |
844 | ||
845 | case UNOP_PREINCREMENT: | |
846 | case UNOP_POSTINCREMENT: | |
847 | case UNOP_PREDECREMENT: | |
848 | case UNOP_POSTDECREMENT: | |
849 | if (!ordered_type(t1)) | |
850 | type_op_error ("Argument to %s must be of an ordered type.",op); | |
851 | break; | |
852 | ||
853 | default: | |
854 | /* Ok. The following operators have different meanings in | |
855 | different languages. */ | |
856 | switch(current_language->la_language) | |
857 | { | |
858 | #ifdef _LANG_c | |
859 | case language_c: | |
545af6ce | 860 | case language_cplus: |
c8023e66 JG |
861 | switch(op) |
862 | { | |
863 | case BINOP_DIV: | |
864 | if (!numeric_type(t1) || !numeric_type(t2)) | |
865 | type_op_error ("Arguments to %s must be numbers.",op); | |
866 | break; | |
867 | } | |
868 | break; | |
869 | #endif | |
870 | ||
871 | #ifdef _LANG_m2 | |
872 | case language_m2: | |
873 | switch(op) | |
874 | { | |
875 | case BINOP_DIV: | |
876 | if (!float_type(t1) || !float_type(t2)) | |
877 | type_op_error ("Arguments to %s must be floating point numbers.",op); | |
878 | break; | |
879 | case BINOP_INTDIV: | |
880 | if (!integral_type(t1) || !integral_type(t2)) | |
881 | type_op_error ("Arguments to %s must be of integral type.",op); | |
882 | break; | |
883 | } | |
884 | #endif | |
885 | } | |
886 | } | |
887 | } | |
7ed0f002 JG |
888 | |
889 | #endif /* 0 */ | |
890 | ||
c8023e66 JG |
891 | \f |
892 | /* This page contains functions for the printing out of | |
893 | error messages that occur during type- and range- | |
894 | checking. */ | |
895 | ||
896 | /* Prints the format string FMT with the operator as a string | |
897 | corresponding to the opcode OP. If FATAL is non-zero, then | |
898 | this is an error and error () is called. Otherwise, it is | |
899 | a warning and printf() is called. */ | |
900 | void | |
901 | op_error (fmt,op,fatal) | |
902 | char *fmt; | |
903 | enum exp_opcode op; | |
904 | int fatal; | |
905 | { | |
906 | if (fatal) | |
907 | error (fmt,op_string(op)); | |
908 | else | |
909 | { | |
318bf84f | 910 | warning (fmt,op_string(op)); |
c8023e66 JG |
911 | } |
912 | } | |
913 | ||
914 | /* These are called when a language fails a type- or range-check. | |
915 | The first argument should be a printf()-style format string, and | |
916 | the rest of the arguments should be its arguments. If | |
917 | [type|range]_check is [type|range]_check_on, then return_to_top_level() | |
918 | is called in the style of error (). Otherwise, the message is prefixed | |
318bf84f | 919 | by the value of warning_pre_print and we do not return to the top level. */ |
7ed0f002 | 920 | |
c8023e66 JG |
921 | void |
922 | type_error (va_alist) | |
7ed0f002 | 923 | va_dcl |
c8023e66 JG |
924 | { |
925 | va_list args; | |
926 | char *string; | |
927 | ||
928 | if (type_check==type_check_warn) | |
318bf84f | 929 | fprintf(stderr,warning_pre_print); |
c8023e66 JG |
930 | else |
931 | target_terminal_ours(); | |
932 | ||
933 | va_start (args); | |
934 | string = va_arg (args, char *); | |
935 | vfprintf (stderr, string, args); | |
936 | fprintf (stderr, "\n"); | |
937 | va_end (args); | |
938 | if (type_check==type_check_on) | |
939 | return_to_top_level(); | |
940 | } | |
941 | ||
942 | void | |
943 | range_error (va_alist) | |
7ed0f002 | 944 | va_dcl |
c8023e66 JG |
945 | { |
946 | va_list args; | |
947 | char *string; | |
948 | ||
949 | if (range_check==range_check_warn) | |
318bf84f | 950 | fprintf(stderr,warning_pre_print); |
c8023e66 JG |
951 | else |
952 | target_terminal_ours(); | |
953 | ||
954 | va_start (args); | |
955 | string = va_arg (args, char *); | |
956 | vfprintf (stderr, string, args); | |
957 | fprintf (stderr, "\n"); | |
958 | va_end (args); | |
959 | if (range_check==range_check_on) | |
960 | return_to_top_level(); | |
961 | } | |
962 | ||
963 | \f | |
964 | /* This page contains miscellaneous functions */ | |
965 | ||
966 | /* Return the language as a string */ | |
967 | char * | |
968 | language_str(lang) | |
969 | enum language lang; | |
970 | { | |
971 | int i; | |
972 | ||
973 | for (i = 0; i < languages_size; i++) { | |
974 | if (languages[i]->la_language == lang) { | |
975 | return languages[i]->la_name; | |
976 | } | |
977 | } | |
978 | return "Unknown"; | |
979 | } | |
980 | ||
981 | struct cmd_list_element *setchecklist = NULL; | |
982 | struct cmd_list_element *showchecklist = NULL; | |
983 | ||
984 | static void | |
d8ce1326 JG |
985 | set_check (ignore, from_tty) |
986 | char *ignore; | |
c8023e66 JG |
987 | int from_tty; |
988 | { | |
989 | printf( | |
990 | "\"set check\" must be followed by the name of a check subcommand.\n"); | |
991 | help_list(setchecklist, "set check ", -1, stdout); | |
992 | } | |
993 | ||
994 | static void | |
be772100 JG |
995 | show_check (ignore, from_tty) |
996 | char *ignore; | |
c8023e66 JG |
997 | int from_tty; |
998 | { | |
999 | cmd_show_list(showchecklist, from_tty, ""); | |
1000 | } | |
1001 | \f | |
1002 | /* Add a language to the set of known languages. */ | |
1003 | ||
1004 | void | |
1005 | add_language (lang) | |
7ed0f002 | 1006 | const struct language_defn *lang; |
c8023e66 JG |
1007 | { |
1008 | if (lang->la_magic != LANG_MAGIC) | |
1009 | { | |
1010 | fprintf(stderr, "Magic number of %s language struct wrong\n", | |
1011 | lang->la_name); | |
1012 | abort(); | |
1013 | } | |
1014 | ||
1015 | if (!languages) | |
1016 | { | |
1017 | languages_allocsize = DEFAULT_ALLOCSIZE; | |
7ed0f002 | 1018 | languages = (const struct language_defn **) xmalloc |
c8023e66 JG |
1019 | (languages_allocsize * sizeof (*languages)); |
1020 | } | |
1021 | if (languages_size >= languages_allocsize) | |
1022 | { | |
1023 | languages_allocsize *= 2; | |
7ed0f002 | 1024 | languages = (const struct language_defn **) xrealloc ((char *) languages, |
c8023e66 JG |
1025 | languages_allocsize * sizeof (*languages)); |
1026 | } | |
1027 | languages[languages_size++] = lang; | |
c8023e66 JG |
1028 | } |
1029 | ||
1030 | /* Define the language that is no language. */ | |
1031 | ||
7ed0f002 | 1032 | static int |
c8023e66 JG |
1033 | unk_lang_parser () |
1034 | { | |
1035 | return 1; | |
1036 | } | |
1037 | ||
7ed0f002 JG |
1038 | static void |
1039 | unk_lang_error (msg) | |
1040 | char *msg; | |
c8023e66 JG |
1041 | { |
1042 | error ("Attempted to parse an expression with unknown language"); | |
1043 | } | |
1044 | ||
1045 | static struct type ** const (unknown_builtin_types[]) = { 0 }; | |
1046 | static const struct op_print unk_op_print_tab[] = { 0 }; | |
1047 | ||
1048 | const struct language_defn unknown_language_defn = { | |
1049 | "unknown", | |
1050 | language_unknown, | |
1051 | &unknown_builtin_types[0], | |
1052 | range_check_off, | |
1053 | type_check_off, | |
1054 | unk_lang_parser, | |
1055 | unk_lang_error, | |
1056 | &builtin_type_error, /* longest signed integral type */ | |
1057 | &builtin_type_error, /* longest unsigned integral type */ | |
1058 | &builtin_type_error, /* longest floating point type */ | |
1059 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1060 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1061 | unk_op_print_tab, /* expression operators for printing */ | |
1062 | LANG_MAGIC | |
1063 | }; | |
1064 | ||
1065 | /* These two structs define fake entries for the "local" and "auto" options. */ | |
1066 | const struct language_defn auto_language_defn = { | |
1067 | "auto", | |
1068 | language_auto, | |
1069 | &unknown_builtin_types[0], | |
1070 | range_check_off, | |
1071 | type_check_off, | |
1072 | unk_lang_parser, | |
1073 | unk_lang_error, | |
1074 | &builtin_type_error, /* longest signed integral type */ | |
1075 | &builtin_type_error, /* longest unsigned integral type */ | |
1076 | &builtin_type_error, /* longest floating point type */ | |
1077 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1078 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1079 | unk_op_print_tab, /* expression operators for printing */ | |
1080 | LANG_MAGIC | |
1081 | }; | |
1082 | ||
1083 | const struct language_defn local_language_defn = { | |
1084 | "local", | |
1085 | language_auto, | |
1086 | &unknown_builtin_types[0], | |
1087 | range_check_off, | |
1088 | type_check_off, | |
1089 | unk_lang_parser, | |
1090 | unk_lang_error, | |
1091 | &builtin_type_error, /* longest signed integral type */ | |
1092 | &builtin_type_error, /* longest unsigned integral type */ | |
1093 | &builtin_type_error, /* longest floating point type */ | |
1094 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ | |
1095 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ | |
1096 | unk_op_print_tab, /* expression operators for printing */ | |
1097 | LANG_MAGIC | |
1098 | }; | |
1099 | \f | |
1100 | /* Initialize the language routines */ | |
1101 | ||
1102 | void | |
1103 | _initialize_language() | |
1104 | { | |
1105 | struct cmd_list_element *set, *show; | |
1106 | ||
1107 | /* GDB commands for language specific stuff */ | |
1108 | ||
1109 | set = add_set_cmd ("language", class_support, var_string_noescape, | |
1110 | (char *)&language, | |
0b798409 | 1111 | "Set the current source language.", |
c8023e66 JG |
1112 | &setlist); |
1113 | show = add_show_from_set (set, &showlist); | |
1ab3bf1b JG |
1114 | set->function.cfunc = set_language_command; |
1115 | show->function.cfunc = show_language_command; | |
c8023e66 JG |
1116 | |
1117 | add_prefix_cmd ("check", no_class, set_check, | |
1118 | "Set the status of the type/range checker", | |
1119 | &setchecklist, "set check ", 0, &setlist); | |
1120 | add_alias_cmd ("c", "check", no_class, 1, &setlist); | |
1121 | add_alias_cmd ("ch", "check", no_class, 1, &setlist); | |
1122 | ||
1123 | add_prefix_cmd ("check", no_class, show_check, | |
1124 | "Show the status of the type/range checker", | |
7cb83757 | 1125 | &showchecklist, "show check ", 0, &showlist); |
c8023e66 JG |
1126 | add_alias_cmd ("c", "check", no_class, 1, &showlist); |
1127 | add_alias_cmd ("ch", "check", no_class, 1, &showlist); | |
1128 | ||
1129 | set = add_set_cmd ("type", class_support, var_string_noescape, | |
1130 | (char *)&type, | |
7cb83757 | 1131 | "Set type checking. (on/warn/off/auto)", |
c8023e66 JG |
1132 | &setchecklist); |
1133 | show = add_show_from_set (set, &showchecklist); | |
1ab3bf1b JG |
1134 | set->function.cfunc = set_type_command; |
1135 | show->function.cfunc = show_type_command; | |
c8023e66 JG |
1136 | |
1137 | set = add_set_cmd ("range", class_support, var_string_noescape, | |
1138 | (char *)&range, | |
7cb83757 | 1139 | "Set range checking. (on/warn/off/auto)", |
c8023e66 JG |
1140 | &setchecklist); |
1141 | show = add_show_from_set (set, &showchecklist); | |
1ab3bf1b JG |
1142 | set->function.cfunc = set_range_command; |
1143 | show->function.cfunc = show_range_command; | |
c8023e66 JG |
1144 | |
1145 | add_language (&unknown_language_defn); | |
1146 | add_language (&local_language_defn); | |
1147 | add_language (&auto_language_defn); | |
1148 | ||
1149 | language = savestring ("auto",strlen("auto")); | |
1150 | range = savestring ("auto",strlen("auto")); | |
1151 | type = savestring ("auto",strlen("auto")); | |
1152 | ||
1153 | /* Have the above take effect */ | |
1154 | ||
5f3d478e | 1155 | set_language_command (language, 0); |
c8023e66 JG |
1156 | set_type_command (NULL, 0); |
1157 | set_range_command (NULL, 0); | |
1158 | } |