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ed3ef339 DE |
1 | /* GDB/Scheme support for math operations on values. |
2 | ||
32d0add0 | 3 | Copyright (C) 2008-2015 Free Software Foundation, Inc. |
ed3ef339 DE |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | /* See README file in this directory for implementation notes, coding | |
21 | conventions, et.al. */ | |
22 | ||
23 | #include "defs.h" | |
24 | #include "arch-utils.h" | |
25 | #include "charset.h" | |
26 | #include "cp-abi.h" | |
27 | #include "doublest.h" /* Needed by dfp.h. */ | |
28 | #include "expression.h" /* Needed by dfp.h. */ | |
29 | #include "dfp.h" | |
ed3ef339 DE |
30 | #include "symtab.h" /* Needed by language.h. */ |
31 | #include "language.h" | |
32 | #include "valprint.h" | |
33 | #include "value.h" | |
34 | #include "guile-internal.h" | |
35 | ||
36 | /* Note: Use target types here to remain consistent with the values system in | |
37 | GDB (which uses target arithmetic). */ | |
38 | ||
39 | enum valscm_unary_opcode | |
40 | { | |
41 | VALSCM_NOT, | |
42 | VALSCM_NEG, | |
43 | VALSCM_NOP, | |
44 | VALSCM_ABS, | |
45 | /* Note: This is Scheme's "logical not", not GDB's. | |
46 | GDB calls this UNOP_COMPLEMENT. */ | |
47 | VALSCM_LOGNOT | |
48 | }; | |
49 | ||
50 | enum valscm_binary_opcode | |
51 | { | |
52 | VALSCM_ADD, | |
53 | VALSCM_SUB, | |
54 | VALSCM_MUL, | |
55 | VALSCM_DIV, | |
56 | VALSCM_REM, | |
57 | VALSCM_MOD, | |
58 | VALSCM_POW, | |
59 | VALSCM_LSH, | |
60 | VALSCM_RSH, | |
61 | VALSCM_MIN, | |
62 | VALSCM_MAX, | |
63 | VALSCM_BITAND, | |
64 | VALSCM_BITOR, | |
65 | VALSCM_BITXOR | |
66 | }; | |
67 | ||
68 | /* If TYPE is a reference, return the target; otherwise return TYPE. */ | |
69 | #define STRIP_REFERENCE(TYPE) \ | |
70 | ((TYPE_CODE (TYPE) == TYPE_CODE_REF) ? (TYPE_TARGET_TYPE (TYPE)) : (TYPE)) | |
71 | ||
72 | /* Returns a value object which is the result of applying the operation | |
73 | specified by OPCODE to the given argument. | |
74 | If there's an error a Scheme exception is thrown. */ | |
75 | ||
76 | static SCM | |
77 | vlscm_unop (enum valscm_unary_opcode opcode, SCM x, const char *func_name) | |
78 | { | |
79 | struct gdbarch *gdbarch = get_current_arch (); | |
80 | const struct language_defn *language = current_language; | |
81 | struct value *arg1; | |
82 | SCM result = SCM_BOOL_F; | |
83 | struct value *res_val = NULL; | |
84 | SCM except_scm; | |
85 | struct cleanup *cleanups; | |
86 | volatile struct gdb_exception except; | |
87 | ||
88 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
89 | ||
90 | arg1 = vlscm_convert_value_from_scheme (func_name, SCM_ARG1, x, | |
91 | &except_scm, gdbarch, language); | |
92 | if (arg1 == NULL) | |
93 | { | |
94 | do_cleanups (cleanups); | |
95 | gdbscm_throw (except_scm); | |
96 | } | |
97 | ||
98 | TRY_CATCH (except, RETURN_MASK_ALL) | |
99 | { | |
100 | switch (opcode) | |
101 | { | |
102 | case VALSCM_NOT: | |
103 | /* Alas gdb and guile use the opposite meaning for "logical not". */ | |
104 | { | |
105 | struct type *type = language_bool_type (language, gdbarch); | |
106 | res_val | |
107 | = value_from_longest (type, (LONGEST) value_logical_not (arg1)); | |
108 | } | |
109 | break; | |
110 | case VALSCM_NEG: | |
111 | res_val = value_neg (arg1); | |
112 | break; | |
113 | case VALSCM_NOP: | |
114 | /* Seemingly a no-op, but if X was a Scheme value it is now | |
115 | a <gdb:value> object. */ | |
116 | res_val = arg1; | |
117 | break; | |
118 | case VALSCM_ABS: | |
119 | if (value_less (arg1, value_zero (value_type (arg1), not_lval))) | |
120 | res_val = value_neg (arg1); | |
121 | else | |
122 | res_val = arg1; | |
123 | break; | |
124 | case VALSCM_LOGNOT: | |
125 | res_val = value_complement (arg1); | |
126 | break; | |
127 | default: | |
128 | gdb_assert_not_reached ("unsupported operation"); | |
129 | } | |
130 | } | |
131 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
132 | ||
133 | gdb_assert (res_val != NULL); | |
134 | result = vlscm_scm_from_value (res_val); | |
135 | ||
136 | do_cleanups (cleanups); | |
137 | ||
138 | if (gdbscm_is_exception (result)) | |
139 | gdbscm_throw (result); | |
140 | ||
141 | return result; | |
142 | } | |
143 | ||
144 | /* Returns a value object which is the result of applying the operation | |
145 | specified by OPCODE to the given arguments. | |
146 | If there's an error a Scheme exception is thrown. */ | |
147 | ||
148 | static SCM | |
149 | vlscm_binop (enum valscm_binary_opcode opcode, SCM x, SCM y, | |
150 | const char *func_name) | |
151 | { | |
152 | struct gdbarch *gdbarch = get_current_arch (); | |
153 | const struct language_defn *language = current_language; | |
154 | struct value *arg1, *arg2; | |
155 | SCM result = SCM_BOOL_F; | |
156 | struct value *res_val = NULL; | |
157 | SCM except_scm; | |
158 | struct cleanup *cleanups; | |
159 | volatile struct gdb_exception except; | |
160 | ||
161 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
162 | ||
163 | arg1 = vlscm_convert_value_from_scheme (func_name, SCM_ARG1, x, | |
164 | &except_scm, gdbarch, language); | |
165 | if (arg1 == NULL) | |
166 | { | |
167 | do_cleanups (cleanups); | |
168 | gdbscm_throw (except_scm); | |
169 | } | |
170 | arg2 = vlscm_convert_value_from_scheme (func_name, SCM_ARG2, y, | |
171 | &except_scm, gdbarch, language); | |
172 | if (arg2 == NULL) | |
173 | { | |
174 | do_cleanups (cleanups); | |
175 | gdbscm_throw (except_scm); | |
176 | } | |
177 | ||
178 | TRY_CATCH (except, RETURN_MASK_ALL) | |
179 | { | |
180 | switch (opcode) | |
181 | { | |
182 | case VALSCM_ADD: | |
183 | { | |
184 | struct type *ltype = value_type (arg1); | |
185 | struct type *rtype = value_type (arg2); | |
186 | ||
187 | CHECK_TYPEDEF (ltype); | |
188 | ltype = STRIP_REFERENCE (ltype); | |
189 | CHECK_TYPEDEF (rtype); | |
190 | rtype = STRIP_REFERENCE (rtype); | |
191 | ||
192 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR | |
193 | && is_integral_type (rtype)) | |
194 | res_val = value_ptradd (arg1, value_as_long (arg2)); | |
195 | else if (TYPE_CODE (rtype) == TYPE_CODE_PTR | |
196 | && is_integral_type (ltype)) | |
197 | res_val = value_ptradd (arg2, value_as_long (arg1)); | |
198 | else | |
199 | res_val = value_binop (arg1, arg2, BINOP_ADD); | |
200 | } | |
201 | break; | |
202 | case VALSCM_SUB: | |
203 | { | |
204 | struct type *ltype = value_type (arg1); | |
205 | struct type *rtype = value_type (arg2); | |
206 | ||
207 | CHECK_TYPEDEF (ltype); | |
208 | ltype = STRIP_REFERENCE (ltype); | |
209 | CHECK_TYPEDEF (rtype); | |
210 | rtype = STRIP_REFERENCE (rtype); | |
211 | ||
212 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR | |
213 | && TYPE_CODE (rtype) == TYPE_CODE_PTR) | |
214 | { | |
215 | /* A ptrdiff_t for the target would be preferable here. */ | |
216 | res_val | |
217 | = value_from_longest (builtin_type (gdbarch)->builtin_long, | |
218 | value_ptrdiff (arg1, arg2)); | |
219 | } | |
220 | else if (TYPE_CODE (ltype) == TYPE_CODE_PTR | |
221 | && is_integral_type (rtype)) | |
222 | res_val = value_ptradd (arg1, - value_as_long (arg2)); | |
223 | else | |
224 | res_val = value_binop (arg1, arg2, BINOP_SUB); | |
225 | } | |
226 | break; | |
227 | case VALSCM_MUL: | |
228 | res_val = value_binop (arg1, arg2, BINOP_MUL); | |
229 | break; | |
230 | case VALSCM_DIV: | |
231 | res_val = value_binop (arg1, arg2, BINOP_DIV); | |
232 | break; | |
233 | case VALSCM_REM: | |
234 | res_val = value_binop (arg1, arg2, BINOP_REM); | |
235 | break; | |
236 | case VALSCM_MOD: | |
237 | res_val = value_binop (arg1, arg2, BINOP_MOD); | |
238 | break; | |
239 | case VALSCM_POW: | |
240 | res_val = value_binop (arg1, arg2, BINOP_EXP); | |
241 | break; | |
242 | case VALSCM_LSH: | |
243 | res_val = value_binop (arg1, arg2, BINOP_LSH); | |
244 | break; | |
245 | case VALSCM_RSH: | |
246 | res_val = value_binop (arg1, arg2, BINOP_RSH); | |
247 | break; | |
248 | case VALSCM_MIN: | |
249 | res_val = value_binop (arg1, arg2, BINOP_MIN); | |
250 | break; | |
251 | case VALSCM_MAX: | |
252 | res_val = value_binop (arg1, arg2, BINOP_MAX); | |
253 | break; | |
254 | case VALSCM_BITAND: | |
255 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_AND); | |
256 | break; | |
257 | case VALSCM_BITOR: | |
258 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_IOR); | |
259 | break; | |
260 | case VALSCM_BITXOR: | |
261 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_XOR); | |
262 | break; | |
263 | default: | |
264 | gdb_assert_not_reached ("unsupported operation"); | |
265 | } | |
266 | } | |
267 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
268 | ||
269 | gdb_assert (res_val != NULL); | |
270 | result = vlscm_scm_from_value (res_val); | |
271 | ||
272 | do_cleanups (cleanups); | |
273 | ||
274 | if (gdbscm_is_exception (result)) | |
275 | gdbscm_throw (result); | |
276 | ||
277 | return result; | |
278 | } | |
279 | ||
280 | /* (value-add x y) -> <gdb:value> */ | |
281 | ||
282 | static SCM | |
283 | gdbscm_value_add (SCM x, SCM y) | |
284 | { | |
285 | return vlscm_binop (VALSCM_ADD, x, y, FUNC_NAME); | |
286 | } | |
287 | ||
288 | /* (value-sub x y) -> <gdb:value> */ | |
289 | ||
290 | static SCM | |
291 | gdbscm_value_sub (SCM x, SCM y) | |
292 | { | |
293 | return vlscm_binop (VALSCM_SUB, x, y, FUNC_NAME); | |
294 | } | |
295 | ||
296 | /* (value-mul x y) -> <gdb:value> */ | |
297 | ||
298 | static SCM | |
299 | gdbscm_value_mul (SCM x, SCM y) | |
300 | { | |
301 | return vlscm_binop (VALSCM_MUL, x, y, FUNC_NAME); | |
302 | } | |
303 | ||
304 | /* (value-div x y) -> <gdb:value> */ | |
305 | ||
306 | static SCM | |
307 | gdbscm_value_div (SCM x, SCM y) | |
308 | { | |
309 | return vlscm_binop (VALSCM_DIV, x, y, FUNC_NAME); | |
310 | } | |
311 | ||
312 | /* (value-rem x y) -> <gdb:value> */ | |
313 | ||
314 | static SCM | |
315 | gdbscm_value_rem (SCM x, SCM y) | |
316 | { | |
317 | return vlscm_binop (VALSCM_REM, x, y, FUNC_NAME); | |
318 | } | |
319 | ||
320 | /* (value-mod x y) -> <gdb:value> */ | |
321 | ||
322 | static SCM | |
323 | gdbscm_value_mod (SCM x, SCM y) | |
324 | { | |
325 | return vlscm_binop (VALSCM_MOD, x, y, FUNC_NAME); | |
326 | } | |
327 | ||
328 | /* (value-pow x y) -> <gdb:value> */ | |
329 | ||
330 | static SCM | |
331 | gdbscm_value_pow (SCM x, SCM y) | |
332 | { | |
333 | return vlscm_binop (VALSCM_POW, x, y, FUNC_NAME); | |
334 | } | |
335 | ||
336 | /* (value-neg x) -> <gdb:value> */ | |
337 | ||
338 | static SCM | |
339 | gdbscm_value_neg (SCM x) | |
340 | { | |
341 | return vlscm_unop (VALSCM_NEG, x, FUNC_NAME); | |
342 | } | |
343 | ||
344 | /* (value-pos x) -> <gdb:value> */ | |
345 | ||
346 | static SCM | |
347 | gdbscm_value_pos (SCM x) | |
348 | { | |
349 | return vlscm_unop (VALSCM_NOP, x, FUNC_NAME); | |
350 | } | |
351 | ||
352 | /* (value-abs x) -> <gdb:value> */ | |
353 | ||
354 | static SCM | |
355 | gdbscm_value_abs (SCM x) | |
356 | { | |
357 | return vlscm_unop (VALSCM_ABS, x, FUNC_NAME); | |
358 | } | |
359 | ||
360 | /* (value-lsh x y) -> <gdb:value> */ | |
361 | ||
362 | static SCM | |
363 | gdbscm_value_lsh (SCM x, SCM y) | |
364 | { | |
365 | return vlscm_binop (VALSCM_LSH, x, y, FUNC_NAME); | |
366 | } | |
367 | ||
368 | /* (value-rsh x y) -> <gdb:value> */ | |
369 | ||
370 | static SCM | |
371 | gdbscm_value_rsh (SCM x, SCM y) | |
372 | { | |
373 | return vlscm_binop (VALSCM_RSH, x, y, FUNC_NAME); | |
374 | } | |
375 | ||
376 | /* (value-min x y) -> <gdb:value> */ | |
377 | ||
378 | static SCM | |
379 | gdbscm_value_min (SCM x, SCM y) | |
380 | { | |
381 | return vlscm_binop (VALSCM_MIN, x, y, FUNC_NAME); | |
382 | } | |
383 | ||
384 | /* (value-max x y) -> <gdb:value> */ | |
385 | ||
386 | static SCM | |
387 | gdbscm_value_max (SCM x, SCM y) | |
388 | { | |
389 | return vlscm_binop (VALSCM_MAX, x, y, FUNC_NAME); | |
390 | } | |
391 | ||
392 | /* (value-not x) -> <gdb:value> */ | |
393 | ||
394 | static SCM | |
395 | gdbscm_value_not (SCM x) | |
396 | { | |
397 | return vlscm_unop (VALSCM_NOT, x, FUNC_NAME); | |
398 | } | |
399 | ||
400 | /* (value-lognot x) -> <gdb:value> */ | |
401 | ||
402 | static SCM | |
403 | gdbscm_value_lognot (SCM x) | |
404 | { | |
405 | return vlscm_unop (VALSCM_LOGNOT, x, FUNC_NAME); | |
406 | } | |
407 | ||
408 | /* (value-logand x y) -> <gdb:value> */ | |
409 | ||
410 | static SCM | |
411 | gdbscm_value_logand (SCM x, SCM y) | |
412 | { | |
413 | return vlscm_binop (VALSCM_BITAND, x, y, FUNC_NAME); | |
414 | } | |
415 | ||
416 | /* (value-logior x y) -> <gdb:value> */ | |
417 | ||
418 | static SCM | |
419 | gdbscm_value_logior (SCM x, SCM y) | |
420 | { | |
421 | return vlscm_binop (VALSCM_BITOR, x, y, FUNC_NAME); | |
422 | } | |
423 | ||
424 | /* (value-logxor x y) -> <gdb:value> */ | |
425 | ||
426 | static SCM | |
427 | gdbscm_value_logxor (SCM x, SCM y) | |
428 | { | |
429 | return vlscm_binop (VALSCM_BITXOR, x, y, FUNC_NAME); | |
430 | } | |
431 | ||
432 | /* Utility to perform all value comparisons. | |
433 | If there's an error a Scheme exception is thrown. */ | |
434 | ||
435 | static SCM | |
436 | vlscm_rich_compare (int op, SCM x, SCM y, const char *func_name) | |
437 | { | |
438 | struct gdbarch *gdbarch = get_current_arch (); | |
439 | const struct language_defn *language = current_language; | |
440 | struct value *v1, *v2; | |
441 | int result = 0; | |
442 | SCM except_scm; | |
443 | struct cleanup *cleanups; | |
444 | volatile struct gdb_exception except; | |
445 | ||
446 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
447 | ||
448 | v1 = vlscm_convert_value_from_scheme (func_name, SCM_ARG1, x, | |
449 | &except_scm, gdbarch, language); | |
450 | if (v1 == NULL) | |
451 | { | |
452 | do_cleanups (cleanups); | |
453 | gdbscm_throw (except_scm); | |
454 | } | |
455 | v2 = vlscm_convert_value_from_scheme (func_name, SCM_ARG2, y, | |
456 | &except_scm, gdbarch, language); | |
457 | if (v2 == NULL) | |
458 | { | |
459 | do_cleanups (cleanups); | |
460 | gdbscm_throw (except_scm); | |
461 | } | |
462 | ||
463 | TRY_CATCH (except, RETURN_MASK_ALL) | |
464 | { | |
465 | switch (op) | |
466 | { | |
467 | case BINOP_LESS: | |
468 | result = value_less (v1, v2); | |
469 | break; | |
470 | case BINOP_LEQ: | |
471 | result = (value_less (v1, v2) | |
472 | || value_equal (v1, v2)); | |
473 | break; | |
474 | case BINOP_EQUAL: | |
475 | result = value_equal (v1, v2); | |
476 | break; | |
477 | case BINOP_NOTEQUAL: | |
478 | gdb_assert_not_reached ("not-equal not implemented"); | |
479 | case BINOP_GTR: | |
480 | result = value_less (v2, v1); | |
481 | break; | |
482 | case BINOP_GEQ: | |
483 | result = (value_less (v2, v1) | |
484 | || value_equal (v1, v2)); | |
485 | break; | |
486 | default: | |
487 | gdb_assert_not_reached ("invalid <gdb:value> comparison"); | |
488 | } | |
489 | } | |
490 | do_cleanups (cleanups); | |
491 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
492 | ||
493 | return scm_from_bool (result); | |
494 | } | |
495 | ||
496 | /* (value=? x y) -> boolean | |
497 | There is no "not-equal?" function (value!= ?) on purpose. | |
498 | We're following string=?, etc. as our Guide here. */ | |
499 | ||
500 | static SCM | |
501 | gdbscm_value_eq_p (SCM x, SCM y) | |
502 | { | |
503 | return vlscm_rich_compare (BINOP_EQUAL, x, y, FUNC_NAME); | |
504 | } | |
505 | ||
506 | /* (value<? x y) -> boolean */ | |
507 | ||
508 | static SCM | |
509 | gdbscm_value_lt_p (SCM x, SCM y) | |
510 | { | |
511 | return vlscm_rich_compare (BINOP_LESS, x, y, FUNC_NAME); | |
512 | } | |
513 | ||
514 | /* (value<=? x y) -> boolean */ | |
515 | ||
516 | static SCM | |
517 | gdbscm_value_le_p (SCM x, SCM y) | |
518 | { | |
519 | return vlscm_rich_compare (BINOP_LEQ, x, y, FUNC_NAME); | |
520 | } | |
521 | ||
522 | /* (value>? x y) -> boolean */ | |
523 | ||
524 | static SCM | |
525 | gdbscm_value_gt_p (SCM x, SCM y) | |
526 | { | |
527 | return vlscm_rich_compare (BINOP_GTR, x, y, FUNC_NAME); | |
528 | } | |
529 | ||
530 | /* (value>=? x y) -> boolean */ | |
531 | ||
532 | static SCM | |
533 | gdbscm_value_ge_p (SCM x, SCM y) | |
534 | { | |
535 | return vlscm_rich_compare (BINOP_GEQ, x, y, FUNC_NAME); | |
536 | } | |
537 | \f | |
538 | /* Subroutine of vlscm_convert_typed_value_from_scheme to simplify it. | |
539 | Convert OBJ, a Scheme number, to a <gdb:value> object. | |
540 | OBJ_ARG_POS is its position in the argument list, used in exception text. | |
541 | ||
542 | TYPE is the result type. TYPE_ARG_POS is its position in | |
543 | the argument list, used in exception text. | |
544 | TYPE_SCM is Scheme object wrapping TYPE, used in exception text. | |
545 | ||
546 | If the number isn't representable, e.g. it's too big, a <gdb:exception> | |
547 | object is stored in *EXCEPT_SCMP and NULL is returned. | |
548 | The conversion may throw a gdb error, e.g., if TYPE is invalid. */ | |
549 | ||
550 | static struct value * | |
551 | vlscm_convert_typed_number (const char *func_name, int obj_arg_pos, SCM obj, | |
552 | int type_arg_pos, SCM type_scm, struct type *type, | |
553 | struct gdbarch *gdbarch, SCM *except_scmp) | |
554 | { | |
555 | if (is_integral_type (type) | |
556 | || TYPE_CODE (type) == TYPE_CODE_PTR) | |
557 | { | |
558 | if (TYPE_UNSIGNED (type)) | |
559 | { | |
560 | ULONGEST max; | |
561 | ||
562 | get_unsigned_type_max (type, &max); | |
563 | if (!scm_is_unsigned_integer (obj, 0, max)) | |
564 | { | |
565 | *except_scmp | |
566 | = gdbscm_make_out_of_range_error (func_name, | |
567 | obj_arg_pos, obj, | |
568 | _("value out of range for type")); | |
569 | return NULL; | |
570 | } | |
571 | return value_from_longest (type, gdbscm_scm_to_ulongest (obj)); | |
572 | } | |
573 | else | |
574 | { | |
575 | LONGEST min, max; | |
576 | ||
577 | get_signed_type_minmax (type, &min, &max); | |
578 | if (!scm_is_signed_integer (obj, min, max)) | |
579 | { | |
580 | *except_scmp | |
581 | = gdbscm_make_out_of_range_error (func_name, | |
582 | obj_arg_pos, obj, | |
583 | _("value out of range for type")); | |
584 | return NULL; | |
585 | } | |
586 | return value_from_longest (type, gdbscm_scm_to_longest (obj)); | |
587 | } | |
588 | } | |
589 | else if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
590 | return value_from_double (type, scm_to_double (obj)); | |
591 | else | |
592 | { | |
593 | *except_scmp = gdbscm_make_type_error (func_name, obj_arg_pos, obj, | |
594 | NULL); | |
595 | return NULL; | |
596 | } | |
597 | } | |
598 | ||
599 | /* Return non-zero if OBJ, an integer, fits in TYPE. */ | |
600 | ||
601 | static int | |
602 | vlscm_integer_fits_p (SCM obj, struct type *type) | |
603 | { | |
604 | if (TYPE_UNSIGNED (type)) | |
605 | { | |
606 | ULONGEST max; | |
607 | ||
608 | /* If scm_is_unsigned_integer can't work with this type, just punt. */ | |
609 | if (TYPE_LENGTH (type) > sizeof (scm_t_uintmax)) | |
610 | return 0; | |
611 | get_unsigned_type_max (type, &max); | |
612 | return scm_is_unsigned_integer (obj, 0, max); | |
613 | } | |
614 | else | |
615 | { | |
616 | LONGEST min, max; | |
617 | ||
618 | /* If scm_is_signed_integer can't work with this type, just punt. */ | |
619 | if (TYPE_LENGTH (type) > sizeof (scm_t_intmax)) | |
620 | return 0; | |
621 | get_signed_type_minmax (type, &min, &max); | |
622 | return scm_is_signed_integer (obj, min, max); | |
623 | } | |
624 | } | |
625 | ||
626 | /* Subroutine of vlscm_convert_typed_value_from_scheme to simplify it. | |
627 | Convert OBJ, a Scheme number, to a <gdb:value> object. | |
628 | OBJ_ARG_POS is its position in the argument list, used in exception text. | |
629 | ||
630 | If OBJ is an integer, then the smallest int that will hold the value in | |
631 | the following progression is chosen: | |
632 | int, unsigned int, long, unsigned long, long long, unsigned long long. | |
633 | Otherwise, if OBJ is a real number, then it is converted to a double. | |
634 | Otherwise an exception is thrown. | |
635 | ||
636 | If the number isn't representable, e.g. it's too big, a <gdb:exception> | |
637 | object is stored in *EXCEPT_SCMP and NULL is returned. */ | |
638 | ||
639 | static struct value * | |
640 | vlscm_convert_number (const char *func_name, int obj_arg_pos, SCM obj, | |
641 | struct gdbarch *gdbarch, SCM *except_scmp) | |
642 | { | |
643 | const struct builtin_type *bt = builtin_type (gdbarch); | |
644 | ||
645 | /* One thing to keep in mind here is that we are interested in the | |
646 | target's representation of OBJ, not the host's. */ | |
647 | ||
648 | if (scm_is_exact (obj) && scm_is_integer (obj)) | |
649 | { | |
650 | if (vlscm_integer_fits_p (obj, bt->builtin_int)) | |
651 | return value_from_longest (bt->builtin_int, | |
652 | gdbscm_scm_to_longest (obj)); | |
653 | if (vlscm_integer_fits_p (obj, bt->builtin_unsigned_int)) | |
654 | return value_from_longest (bt->builtin_unsigned_int, | |
655 | gdbscm_scm_to_ulongest (obj)); | |
656 | if (vlscm_integer_fits_p (obj, bt->builtin_long)) | |
657 | return value_from_longest (bt->builtin_long, | |
658 | gdbscm_scm_to_longest (obj)); | |
659 | if (vlscm_integer_fits_p (obj, bt->builtin_unsigned_long)) | |
660 | return value_from_longest (bt->builtin_unsigned_long, | |
661 | gdbscm_scm_to_ulongest (obj)); | |
662 | if (vlscm_integer_fits_p (obj, bt->builtin_long_long)) | |
663 | return value_from_longest (bt->builtin_long_long, | |
664 | gdbscm_scm_to_longest (obj)); | |
665 | if (vlscm_integer_fits_p (obj, bt->builtin_unsigned_long_long)) | |
666 | return value_from_longest (bt->builtin_unsigned_long_long, | |
667 | gdbscm_scm_to_ulongest (obj)); | |
668 | } | |
669 | else if (scm_is_real (obj)) | |
670 | return value_from_double (bt->builtin_double, scm_to_double (obj)); | |
671 | ||
672 | *except_scmp = gdbscm_make_out_of_range_error (func_name, obj_arg_pos, obj, | |
673 | _("value not a number representable on the target")); | |
674 | return NULL; | |
675 | } | |
676 | ||
677 | /* Subroutine of vlscm_convert_typed_value_from_scheme to simplify it. | |
678 | Convert BV, a Scheme bytevector, to a <gdb:value> object. | |
679 | ||
680 | TYPE, if non-NULL, is the result type. Otherwise, a vector of type | |
681 | uint8_t is used. | |
682 | TYPE_SCM is Scheme object wrapping TYPE, used in exception text, | |
683 | or #f if TYPE is NULL. | |
684 | ||
685 | If the bytevector isn't the same size as the type, then a <gdb:exception> | |
686 | object is stored in *EXCEPT_SCMP, and NULL is returned. */ | |
687 | ||
688 | static struct value * | |
689 | vlscm_convert_bytevector (SCM bv, struct type *type, SCM type_scm, | |
690 | int arg_pos, const char *func_name, | |
691 | SCM *except_scmp, struct gdbarch *gdbarch) | |
692 | { | |
693 | LONGEST length = SCM_BYTEVECTOR_LENGTH (bv); | |
694 | struct value *value; | |
695 | ||
696 | if (type == NULL) | |
697 | { | |
698 | type = builtin_type (gdbarch)->builtin_uint8; | |
699 | type = lookup_array_range_type (type, 0, length); | |
700 | make_vector_type (type); | |
701 | } | |
702 | type = check_typedef (type); | |
703 | if (TYPE_LENGTH (type) != length) | |
704 | { | |
705 | *except_scmp = gdbscm_make_out_of_range_error (func_name, arg_pos, | |
706 | type_scm, | |
707 | _("size of type does not match size of bytevector")); | |
708 | return NULL; | |
709 | } | |
710 | ||
711 | value = value_from_contents (type, | |
712 | (gdb_byte *) SCM_BYTEVECTOR_CONTENTS (bv)); | |
713 | return value; | |
714 | } | |
715 | ||
716 | /* Convert OBJ, a Scheme value, to a <gdb:value> object. | |
717 | OBJ_ARG_POS is its position in the argument list, used in exception text. | |
718 | ||
719 | TYPE, if non-NULL, is the result type which must be compatible with | |
720 | the value being converted. | |
721 | If TYPE is NULL then a suitable default type is chosen. | |
722 | TYPE_SCM is Scheme object wrapping TYPE, used in exception text, | |
723 | or SCM_UNDEFINED if TYPE is NULL. | |
724 | TYPE_ARG_POS is its position in the argument list, used in exception text, | |
725 | or -1 if TYPE is NULL. | |
726 | ||
727 | OBJ may also be a <gdb:value> object, in which case a copy is returned | |
728 | and TYPE must be NULL. | |
729 | ||
730 | If the value cannot be converted, NULL is returned and a gdb:exception | |
731 | object is stored in *EXCEPT_SCMP. | |
732 | Otherwise the new value is returned, added to the all_values chain. */ | |
733 | ||
734 | struct value * | |
735 | vlscm_convert_typed_value_from_scheme (const char *func_name, | |
736 | int obj_arg_pos, SCM obj, | |
737 | int type_arg_pos, SCM type_scm, | |
738 | struct type *type, | |
739 | SCM *except_scmp, | |
740 | struct gdbarch *gdbarch, | |
741 | const struct language_defn *language) | |
742 | { | |
743 | struct value *value = NULL; | |
744 | SCM except_scm = SCM_BOOL_F; | |
745 | volatile struct gdb_exception except; | |
746 | ||
747 | if (type == NULL) | |
748 | { | |
749 | gdb_assert (type_arg_pos == -1); | |
750 | gdb_assert (SCM_UNBNDP (type_scm)); | |
751 | } | |
752 | ||
753 | *except_scmp = SCM_BOOL_F; | |
754 | ||
755 | TRY_CATCH (except, RETURN_MASK_ALL) | |
756 | { | |
757 | if (vlscm_is_value (obj)) | |
758 | { | |
759 | if (type != NULL) | |
760 | { | |
761 | except_scm = gdbscm_make_misc_error (func_name, type_arg_pos, | |
762 | type_scm, | |
763 | _("No type allowed")); | |
764 | value = NULL; | |
765 | } | |
766 | else | |
767 | value = value_copy (vlscm_scm_to_value (obj)); | |
768 | } | |
769 | else if (gdbscm_is_true (scm_bytevector_p (obj))) | |
770 | { | |
771 | value = vlscm_convert_bytevector (obj, type, type_scm, | |
772 | obj_arg_pos, func_name, | |
773 | &except_scm, gdbarch); | |
774 | } | |
775 | else if (gdbscm_is_bool (obj)) | |
776 | { | |
777 | if (type != NULL | |
778 | && !is_integral_type (type)) | |
779 | { | |
780 | except_scm = gdbscm_make_type_error (func_name, type_arg_pos, | |
781 | type_scm, NULL); | |
782 | } | |
783 | else | |
784 | { | |
785 | value = value_from_longest (type | |
786 | ? type | |
787 | : language_bool_type (language, | |
788 | gdbarch), | |
789 | gdbscm_is_true (obj)); | |
790 | } | |
791 | } | |
792 | else if (scm_is_number (obj)) | |
793 | { | |
794 | if (type != NULL) | |
795 | { | |
796 | value = vlscm_convert_typed_number (func_name, obj_arg_pos, obj, | |
797 | type_arg_pos, type_scm, type, | |
798 | gdbarch, &except_scm); | |
799 | } | |
800 | else | |
801 | { | |
802 | value = vlscm_convert_number (func_name, obj_arg_pos, obj, | |
803 | gdbarch, &except_scm); | |
804 | } | |
805 | } | |
806 | else if (scm_is_string (obj)) | |
807 | { | |
808 | char *s; | |
809 | size_t len; | |
810 | struct cleanup *cleanup; | |
811 | ||
812 | if (type != NULL) | |
813 | { | |
814 | except_scm = gdbscm_make_misc_error (func_name, type_arg_pos, | |
815 | type_scm, | |
816 | _("No type allowed")); | |
817 | value = NULL; | |
818 | } | |
819 | else | |
820 | { | |
821 | /* TODO: Provide option to specify conversion strategy. */ | |
822 | s = gdbscm_scm_to_string (obj, &len, | |
823 | target_charset (gdbarch), | |
824 | 0 /*non-strict*/, | |
825 | &except_scm); | |
826 | if (s != NULL) | |
827 | { | |
828 | cleanup = make_cleanup (xfree, s); | |
829 | value | |
830 | = value_cstring (s, len, | |
831 | language_string_char_type (language, | |
832 | gdbarch)); | |
833 | do_cleanups (cleanup); | |
834 | } | |
835 | else | |
836 | value = NULL; | |
837 | } | |
838 | } | |
839 | else if (lsscm_is_lazy_string (obj)) | |
840 | { | |
841 | if (type != NULL) | |
842 | { | |
843 | except_scm = gdbscm_make_misc_error (func_name, type_arg_pos, | |
844 | type_scm, | |
845 | _("No type allowed")); | |
846 | value = NULL; | |
847 | } | |
848 | else | |
849 | { | |
850 | value = lsscm_safe_lazy_string_to_value (obj, obj_arg_pos, | |
851 | func_name, | |
852 | &except_scm); | |
853 | } | |
854 | } | |
855 | else /* OBJ isn't anything we support. */ | |
856 | { | |
857 | except_scm = gdbscm_make_type_error (func_name, obj_arg_pos, obj, | |
858 | NULL); | |
859 | value = NULL; | |
860 | } | |
861 | } | |
862 | if (except.reason < 0) | |
863 | except_scm = gdbscm_scm_from_gdb_exception (except); | |
864 | ||
865 | if (gdbscm_is_true (except_scm)) | |
866 | { | |
867 | gdb_assert (value == NULL); | |
868 | *except_scmp = except_scm; | |
869 | } | |
870 | ||
871 | return value; | |
872 | } | |
873 | ||
874 | /* Wrapper around vlscm_convert_typed_value_from_scheme for cases where there | |
875 | is no supplied type. See vlscm_convert_typed_value_from_scheme for | |
876 | details. */ | |
877 | ||
878 | struct value * | |
879 | vlscm_convert_value_from_scheme (const char *func_name, | |
880 | int obj_arg_pos, SCM obj, | |
881 | SCM *except_scmp, struct gdbarch *gdbarch, | |
882 | const struct language_defn *language) | |
883 | { | |
884 | return vlscm_convert_typed_value_from_scheme (func_name, obj_arg_pos, obj, | |
885 | -1, SCM_UNDEFINED, NULL, | |
886 | except_scmp, | |
887 | gdbarch, language); | |
888 | } | |
889 | \f | |
890 | /* Initialize value math support. */ | |
891 | ||
892 | static const scheme_function math_functions[] = | |
893 | { | |
894 | { "value-add", 2, 0, 0, gdbscm_value_add, | |
895 | "\ | |
896 | Return a + b." }, | |
897 | ||
898 | { "value-sub", 2, 0, 0, gdbscm_value_sub, | |
899 | "\ | |
900 | Return a - b." }, | |
901 | ||
902 | { "value-mul", 2, 0, 0, gdbscm_value_mul, | |
903 | "\ | |
904 | Return a * b." }, | |
905 | ||
906 | { "value-div", 2, 0, 0, gdbscm_value_div, | |
907 | "\ | |
908 | Return a / b." }, | |
909 | ||
910 | { "value-rem", 2, 0, 0, gdbscm_value_rem, | |
911 | "\ | |
912 | Return a % b." }, | |
913 | ||
914 | { "value-mod", 2, 0, 0, gdbscm_value_mod, | |
915 | "\ | |
916 | Return a mod b. See Knuth 1.2.4." }, | |
917 | ||
918 | { "value-pow", 2, 0, 0, gdbscm_value_pow, | |
919 | "\ | |
920 | Return pow (x, y)." }, | |
921 | ||
922 | { "value-not", 1, 0, 0, gdbscm_value_not, | |
923 | "\ | |
924 | Return !a." }, | |
925 | ||
926 | { "value-neg", 1, 0, 0, gdbscm_value_neg, | |
927 | "\ | |
928 | Return -a." }, | |
929 | ||
930 | { "value-pos", 1, 0, 0, gdbscm_value_pos, | |
931 | "\ | |
932 | Return a." }, | |
933 | ||
934 | { "value-abs", 1, 0, 0, gdbscm_value_abs, | |
935 | "\ | |
936 | Return abs (a)." }, | |
937 | ||
938 | { "value-lsh", 2, 0, 0, gdbscm_value_lsh, | |
939 | "\ | |
940 | Return a << b." }, | |
941 | ||
942 | { "value-rsh", 2, 0, 0, gdbscm_value_rsh, | |
943 | "\ | |
944 | Return a >> b." }, | |
945 | ||
946 | { "value-min", 2, 0, 0, gdbscm_value_min, | |
947 | "\ | |
948 | Return min (a, b)." }, | |
949 | ||
950 | { "value-max", 2, 0, 0, gdbscm_value_max, | |
951 | "\ | |
952 | Return max (a, b)." }, | |
953 | ||
954 | { "value-lognot", 1, 0, 0, gdbscm_value_lognot, | |
955 | "\ | |
956 | Return ~a." }, | |
957 | ||
958 | { "value-logand", 2, 0, 0, gdbscm_value_logand, | |
959 | "\ | |
960 | Return a & b." }, | |
961 | ||
962 | { "value-logior", 2, 0, 0, gdbscm_value_logior, | |
963 | "\ | |
964 | Return a | b." }, | |
965 | ||
966 | { "value-logxor", 2, 0, 0, gdbscm_value_logxor, | |
967 | "\ | |
968 | Return a ^ b." }, | |
969 | ||
970 | { "value=?", 2, 0, 0, gdbscm_value_eq_p, | |
971 | "\ | |
972 | Return a == b." }, | |
973 | ||
974 | { "value<?", 2, 0, 0, gdbscm_value_lt_p, | |
975 | "\ | |
976 | Return a < b." }, | |
977 | ||
978 | { "value<=?", 2, 0, 0, gdbscm_value_le_p, | |
979 | "\ | |
980 | Return a <= b." }, | |
981 | ||
982 | { "value>?", 2, 0, 0, gdbscm_value_gt_p, | |
983 | "\ | |
984 | Return a > b." }, | |
985 | ||
986 | { "value>=?", 2, 0, 0, gdbscm_value_ge_p, | |
987 | "\ | |
988 | Return a >= b." }, | |
989 | ||
990 | END_FUNCTIONS | |
991 | }; | |
992 | ||
993 | void | |
994 | gdbscm_initialize_math (void) | |
995 | { | |
996 | gdbscm_define_functions (math_functions, 1); | |
997 | } |