Commit | Line | Data |
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c906108c | 1 | /* Perform arithmetic and other operations on values, for GDB. |
1bac305b | 2 | |
f23631e4 | 3 | Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
990a07ab AC |
4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free |
5 | Software Foundation, Inc. | |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "value.h" | |
26 | #include "symtab.h" | |
27 | #include "gdbtypes.h" | |
28 | #include "expression.h" | |
29 | #include "target.h" | |
30 | #include "language.h" | |
c906108c | 31 | #include "gdb_string.h" |
d16aafd8 | 32 | #include "doublest.h" |
c4093a6a | 33 | #include <math.h> |
04714b91 | 34 | #include "infcall.h" |
c906108c SS |
35 | |
36 | /* Define whether or not the C operator '/' truncates towards zero for | |
37 | differently signed operands (truncation direction is undefined in C). */ | |
38 | ||
39 | #ifndef TRUNCATION_TOWARDS_ZERO | |
40 | #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2) | |
41 | #endif | |
42 | ||
f23631e4 | 43 | static struct value *value_subscripted_rvalue (struct value *, struct value *, int); |
c906108c | 44 | |
a14ed312 | 45 | void _initialize_valarith (void); |
c906108c | 46 | \f |
c5aa993b | 47 | |
ca439ad2 JI |
48 | /* Given a pointer, return the size of its target. |
49 | If the pointer type is void *, then return 1. | |
50 | If the target type is incomplete, then error out. | |
51 | This isn't a general purpose function, but just a | |
52 | helper for value_sub & value_add. | |
53 | */ | |
54 | ||
55 | static LONGEST | |
56 | find_size_for_pointer_math (struct type *ptr_type) | |
57 | { | |
58 | LONGEST sz = -1; | |
59 | struct type *ptr_target; | |
60 | ||
61 | ptr_target = check_typedef (TYPE_TARGET_TYPE (ptr_type)); | |
62 | ||
63 | sz = TYPE_LENGTH (ptr_target); | |
64 | if (sz == 0) | |
65 | { | |
66 | if (TYPE_CODE (ptr_type) == TYPE_CODE_VOID) | |
67 | sz = 1; | |
68 | else | |
69 | { | |
70 | char *name; | |
71 | ||
72 | name = TYPE_NAME (ptr_target); | |
73 | if (name == NULL) | |
74 | name = TYPE_TAG_NAME (ptr_target); | |
75 | if (name == NULL) | |
8a3fe4f8 AC |
76 | error (_("Cannot perform pointer math on incomplete types, " |
77 | "try casting to a known type, or void *.")); | |
ca439ad2 | 78 | else |
8a3fe4f8 AC |
79 | error (_("Cannot perform pointer math on incomplete type \"%s\", " |
80 | "try casting to a known type, or void *."), name); | |
ca439ad2 JI |
81 | } |
82 | } | |
83 | return sz; | |
84 | } | |
85 | ||
f23631e4 AC |
86 | struct value * |
87 | value_add (struct value *arg1, struct value *arg2) | |
c906108c | 88 | { |
f23631e4 AC |
89 | struct value *valint; |
90 | struct value *valptr; | |
ca439ad2 | 91 | LONGEST sz; |
c906108c SS |
92 | struct type *type1, *type2, *valptrtype; |
93 | ||
994b9211 AC |
94 | arg1 = coerce_array (arg1); |
95 | arg2 = coerce_array (arg2); | |
df407dfe AC |
96 | type1 = check_typedef (value_type (arg1)); |
97 | type2 = check_typedef (value_type (arg2)); | |
c906108c SS |
98 | |
99 | if ((TYPE_CODE (type1) == TYPE_CODE_PTR | |
100 | || TYPE_CODE (type2) == TYPE_CODE_PTR) | |
101 | && | |
2de41bce | 102 | (is_integral_type (type1) || is_integral_type (type2))) |
c906108c SS |
103 | /* Exactly one argument is a pointer, and one is an integer. */ |
104 | { | |
f23631e4 | 105 | struct value *retval; |
c906108c SS |
106 | |
107 | if (TYPE_CODE (type1) == TYPE_CODE_PTR) | |
108 | { | |
109 | valptr = arg1; | |
110 | valint = arg2; | |
111 | valptrtype = type1; | |
112 | } | |
113 | else | |
114 | { | |
115 | valptr = arg2; | |
116 | valint = arg1; | |
117 | valptrtype = type2; | |
118 | } | |
ca439ad2 JI |
119 | |
120 | sz = find_size_for_pointer_math (valptrtype); | |
121 | ||
4478b372 | 122 | retval = value_from_pointer (valptrtype, |
1aa20aa8 | 123 | value_as_address (valptr) |
ca439ad2 | 124 | + (sz * value_as_long (valint))); |
c906108c SS |
125 | return retval; |
126 | } | |
127 | ||
128 | return value_binop (arg1, arg2, BINOP_ADD); | |
129 | } | |
130 | ||
f23631e4 AC |
131 | struct value * |
132 | value_sub (struct value *arg1, struct value *arg2) | |
c906108c SS |
133 | { |
134 | struct type *type1, *type2; | |
994b9211 AC |
135 | arg1 = coerce_array (arg1); |
136 | arg2 = coerce_array (arg2); | |
df407dfe AC |
137 | type1 = check_typedef (value_type (arg1)); |
138 | type2 = check_typedef (value_type (arg2)); | |
c906108c SS |
139 | |
140 | if (TYPE_CODE (type1) == TYPE_CODE_PTR) | |
141 | { | |
2de41bce | 142 | if (is_integral_type (type2)) |
c906108c SS |
143 | { |
144 | /* pointer - integer. */ | |
ca439ad2 JI |
145 | LONGEST sz = find_size_for_pointer_math (type1); |
146 | ||
dbbd9c57 | 147 | return value_from_pointer (type1, |
1aa20aa8 | 148 | (value_as_address (arg1) |
4478b372 | 149 | - (sz * value_as_long (arg2)))); |
c906108c SS |
150 | } |
151 | else if (TYPE_CODE (type2) == TYPE_CODE_PTR | |
3dd3139b MS |
152 | && TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1))) |
153 | == TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type2)))) | |
c906108c SS |
154 | { |
155 | /* pointer to <type x> - pointer to <type x>. */ | |
156 | LONGEST sz = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1))); | |
157 | return value_from_longest | |
c5aa993b | 158 | (builtin_type_long, /* FIXME -- should be ptrdiff_t */ |
c906108c SS |
159 | (value_as_long (arg1) - value_as_long (arg2)) / sz); |
160 | } | |
161 | else | |
162 | { | |
8a3fe4f8 | 163 | error (_("\ |
c906108c | 164 | First argument of `-' is a pointer and second argument is neither\n\ |
8a3fe4f8 | 165 | an integer nor a pointer of the same type.")); |
c906108c SS |
166 | } |
167 | } | |
168 | ||
169 | return value_binop (arg1, arg2, BINOP_SUB); | |
170 | } | |
171 | ||
172 | /* Return the value of ARRAY[IDX]. | |
173 | See comments in value_coerce_array() for rationale for reason for | |
174 | doing lower bounds adjustment here rather than there. | |
175 | FIXME: Perhaps we should validate that the index is valid and if | |
176 | verbosity is set, warn about invalid indices (but still use them). */ | |
177 | ||
f23631e4 AC |
178 | struct value * |
179 | value_subscript (struct value *array, struct value *idx) | |
c906108c | 180 | { |
f23631e4 | 181 | struct value *bound; |
c906108c SS |
182 | int c_style = current_language->c_style_arrays; |
183 | struct type *tarray; | |
184 | ||
994b9211 | 185 | array = coerce_ref (array); |
df407dfe | 186 | tarray = check_typedef (value_type (array)); |
c906108c SS |
187 | |
188 | if (TYPE_CODE (tarray) == TYPE_CODE_ARRAY | |
189 | || TYPE_CODE (tarray) == TYPE_CODE_STRING) | |
190 | { | |
191 | struct type *range_type = TYPE_INDEX_TYPE (tarray); | |
192 | LONGEST lowerbound, upperbound; | |
193 | get_discrete_bounds (range_type, &lowerbound, &upperbound); | |
194 | ||
195 | if (VALUE_LVAL (array) != lval_memory) | |
196 | return value_subscripted_rvalue (array, idx, lowerbound); | |
197 | ||
198 | if (c_style == 0) | |
199 | { | |
200 | LONGEST index = value_as_long (idx); | |
201 | if (index >= lowerbound && index <= upperbound) | |
202 | return value_subscripted_rvalue (array, idx, lowerbound); | |
987504bb JJ |
203 | /* Emit warning unless we have an array of unknown size. |
204 | An array of unknown size has lowerbound 0 and upperbound -1. */ | |
205 | if (upperbound > -1) | |
8a3fe4f8 | 206 | warning (_("array or string index out of range")); |
c906108c SS |
207 | /* fall doing C stuff */ |
208 | c_style = 1; | |
209 | } | |
210 | ||
211 | if (lowerbound != 0) | |
212 | { | |
213 | bound = value_from_longest (builtin_type_int, (LONGEST) lowerbound); | |
214 | idx = value_sub (idx, bound); | |
215 | } | |
216 | ||
217 | array = value_coerce_array (array); | |
218 | } | |
219 | ||
220 | if (TYPE_CODE (tarray) == TYPE_CODE_BITSTRING) | |
221 | { | |
222 | struct type *range_type = TYPE_INDEX_TYPE (tarray); | |
223 | LONGEST index = value_as_long (idx); | |
f23631e4 | 224 | struct value *v; |
c906108c SS |
225 | int offset, byte, bit_index; |
226 | LONGEST lowerbound, upperbound; | |
227 | get_discrete_bounds (range_type, &lowerbound, &upperbound); | |
228 | if (index < lowerbound || index > upperbound) | |
8a3fe4f8 | 229 | error (_("bitstring index out of range")); |
c906108c SS |
230 | index -= lowerbound; |
231 | offset = index / TARGET_CHAR_BIT; | |
0fd88904 | 232 | byte = *((char *) value_contents (array) + offset); |
c906108c SS |
233 | bit_index = index % TARGET_CHAR_BIT; |
234 | byte >>= (BITS_BIG_ENDIAN ? TARGET_CHAR_BIT - 1 - bit_index : bit_index); | |
235 | v = value_from_longest (LA_BOOL_TYPE, byte & 1); | |
9bbda503 AC |
236 | set_value_bitpos (v, bit_index); |
237 | set_value_bitsize (v, 1); | |
c906108c SS |
238 | VALUE_LVAL (v) = VALUE_LVAL (array); |
239 | if (VALUE_LVAL (array) == lval_internalvar) | |
240 | VALUE_LVAL (v) = lval_internalvar_component; | |
241 | VALUE_ADDRESS (v) = VALUE_ADDRESS (array); | |
65d3800a | 242 | VALUE_FRAME_ID (v) = VALUE_FRAME_ID (array); |
f5cf64a7 | 243 | set_value_offset (v, offset + value_offset (array)); |
c906108c SS |
244 | return v; |
245 | } | |
246 | ||
247 | if (c_style) | |
248 | return value_ind (value_add (array, idx)); | |
249 | else | |
8a3fe4f8 | 250 | error (_("not an array or string")); |
c906108c SS |
251 | } |
252 | ||
253 | /* Return the value of EXPR[IDX], expr an aggregate rvalue | |
254 | (eg, a vector register). This routine used to promote floats | |
255 | to doubles, but no longer does. */ | |
256 | ||
f23631e4 AC |
257 | static struct value * |
258 | value_subscripted_rvalue (struct value *array, struct value *idx, int lowerbound) | |
c906108c | 259 | { |
df407dfe | 260 | struct type *array_type = check_typedef (value_type (array)); |
c906108c SS |
261 | struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (array_type)); |
262 | unsigned int elt_size = TYPE_LENGTH (elt_type); | |
263 | LONGEST index = value_as_long (idx); | |
264 | unsigned int elt_offs = elt_size * longest_to_int (index - lowerbound); | |
f23631e4 | 265 | struct value *v; |
c906108c SS |
266 | |
267 | if (index < lowerbound || elt_offs >= TYPE_LENGTH (array_type)) | |
8a3fe4f8 | 268 | error (_("no such vector element")); |
c906108c SS |
269 | |
270 | v = allocate_value (elt_type); | |
d69fe07e | 271 | if (value_lazy (array)) |
dfa52d88 | 272 | set_value_lazy (v, 1); |
c906108c | 273 | else |
0fd88904 AC |
274 | memcpy (value_contents_writeable (v), |
275 | value_contents (array) + elt_offs, elt_size); | |
c906108c SS |
276 | |
277 | if (VALUE_LVAL (array) == lval_internalvar) | |
278 | VALUE_LVAL (v) = lval_internalvar_component; | |
279 | else | |
280 | VALUE_LVAL (v) = VALUE_LVAL (array); | |
281 | VALUE_ADDRESS (v) = VALUE_ADDRESS (array); | |
9ee8fc9d | 282 | VALUE_REGNUM (v) = VALUE_REGNUM (array); |
65d3800a | 283 | VALUE_FRAME_ID (v) = VALUE_FRAME_ID (array); |
f5cf64a7 | 284 | set_value_offset (v, value_offset (array) + elt_offs); |
c906108c SS |
285 | return v; |
286 | } | |
287 | \f | |
288 | /* Check to see if either argument is a structure. This is called so | |
289 | we know whether to go ahead with the normal binop or look for a | |
290 | user defined function instead. | |
291 | ||
292 | For now, we do not overload the `=' operator. */ | |
293 | ||
294 | int | |
f23631e4 | 295 | binop_user_defined_p (enum exp_opcode op, struct value *arg1, struct value *arg2) |
c906108c SS |
296 | { |
297 | struct type *type1, *type2; | |
298 | if (op == BINOP_ASSIGN || op == BINOP_CONCAT) | |
299 | return 0; | |
df407dfe AC |
300 | type1 = check_typedef (value_type (arg1)); |
301 | type2 = check_typedef (value_type (arg2)); | |
c906108c SS |
302 | return (TYPE_CODE (type1) == TYPE_CODE_STRUCT |
303 | || TYPE_CODE (type2) == TYPE_CODE_STRUCT | |
304 | || (TYPE_CODE (type1) == TYPE_CODE_REF | |
305 | && TYPE_CODE (TYPE_TARGET_TYPE (type1)) == TYPE_CODE_STRUCT) | |
306 | || (TYPE_CODE (type2) == TYPE_CODE_REF | |
307 | && TYPE_CODE (TYPE_TARGET_TYPE (type2)) == TYPE_CODE_STRUCT)); | |
308 | } | |
309 | ||
310 | /* Check to see if argument is a structure. This is called so | |
311 | we know whether to go ahead with the normal unop or look for a | |
312 | user defined function instead. | |
313 | ||
314 | For now, we do not overload the `&' operator. */ | |
315 | ||
c5aa993b | 316 | int |
f23631e4 | 317 | unop_user_defined_p (enum exp_opcode op, struct value *arg1) |
c906108c SS |
318 | { |
319 | struct type *type1; | |
320 | if (op == UNOP_ADDR) | |
321 | return 0; | |
df407dfe | 322 | type1 = check_typedef (value_type (arg1)); |
c906108c SS |
323 | for (;;) |
324 | { | |
325 | if (TYPE_CODE (type1) == TYPE_CODE_STRUCT) | |
326 | return 1; | |
327 | else if (TYPE_CODE (type1) == TYPE_CODE_REF) | |
328 | type1 = TYPE_TARGET_TYPE (type1); | |
329 | else | |
330 | return 0; | |
331 | } | |
332 | } | |
333 | ||
334 | /* We know either arg1 or arg2 is a structure, so try to find the right | |
335 | user defined function. Create an argument vector that calls | |
336 | arg1.operator @ (arg1,arg2) and return that value (where '@' is any | |
337 | binary operator which is legal for GNU C++). | |
338 | ||
339 | OP is the operatore, and if it is BINOP_ASSIGN_MODIFY, then OTHEROP | |
340 | is the opcode saying how to modify it. Otherwise, OTHEROP is | |
341 | unused. */ | |
342 | ||
f23631e4 AC |
343 | struct value * |
344 | value_x_binop (struct value *arg1, struct value *arg2, enum exp_opcode op, | |
fba45db2 | 345 | enum exp_opcode otherop, enum noside noside) |
c906108c | 346 | { |
f23631e4 | 347 | struct value **argvec; |
c906108c SS |
348 | char *ptr; |
349 | char tstr[13]; | |
350 | int static_memfuncp; | |
351 | ||
994b9211 AC |
352 | arg1 = coerce_ref (arg1); |
353 | arg2 = coerce_ref (arg2); | |
354 | arg1 = coerce_enum (arg1); | |
355 | arg2 = coerce_enum (arg2); | |
c906108c SS |
356 | |
357 | /* now we know that what we have to do is construct our | |
358 | arg vector and find the right function to call it with. */ | |
359 | ||
df407dfe | 360 | if (TYPE_CODE (check_typedef (value_type (arg1))) != TYPE_CODE_STRUCT) |
8a3fe4f8 | 361 | error (_("Can't do that binary op on that type")); /* FIXME be explicit */ |
c906108c | 362 | |
f23631e4 | 363 | argvec = (struct value **) alloca (sizeof (struct value *) * 4); |
c906108c SS |
364 | argvec[1] = value_addr (arg1); |
365 | argvec[2] = arg2; | |
366 | argvec[3] = 0; | |
367 | ||
c5aa993b JM |
368 | /* make the right function name up */ |
369 | strcpy (tstr, "operator__"); | |
370 | ptr = tstr + 8; | |
c906108c SS |
371 | switch (op) |
372 | { | |
c5aa993b JM |
373 | case BINOP_ADD: |
374 | strcpy (ptr, "+"); | |
375 | break; | |
376 | case BINOP_SUB: | |
377 | strcpy (ptr, "-"); | |
378 | break; | |
379 | case BINOP_MUL: | |
380 | strcpy (ptr, "*"); | |
381 | break; | |
382 | case BINOP_DIV: | |
383 | strcpy (ptr, "/"); | |
384 | break; | |
385 | case BINOP_REM: | |
386 | strcpy (ptr, "%"); | |
387 | break; | |
388 | case BINOP_LSH: | |
389 | strcpy (ptr, "<<"); | |
390 | break; | |
391 | case BINOP_RSH: | |
392 | strcpy (ptr, ">>"); | |
393 | break; | |
394 | case BINOP_BITWISE_AND: | |
395 | strcpy (ptr, "&"); | |
396 | break; | |
397 | case BINOP_BITWISE_IOR: | |
398 | strcpy (ptr, "|"); | |
399 | break; | |
400 | case BINOP_BITWISE_XOR: | |
401 | strcpy (ptr, "^"); | |
402 | break; | |
403 | case BINOP_LOGICAL_AND: | |
404 | strcpy (ptr, "&&"); | |
405 | break; | |
406 | case BINOP_LOGICAL_OR: | |
407 | strcpy (ptr, "||"); | |
408 | break; | |
409 | case BINOP_MIN: | |
410 | strcpy (ptr, "<?"); | |
411 | break; | |
412 | case BINOP_MAX: | |
413 | strcpy (ptr, ">?"); | |
414 | break; | |
415 | case BINOP_ASSIGN: | |
416 | strcpy (ptr, "="); | |
417 | break; | |
418 | case BINOP_ASSIGN_MODIFY: | |
c906108c SS |
419 | switch (otherop) |
420 | { | |
c5aa993b JM |
421 | case BINOP_ADD: |
422 | strcpy (ptr, "+="); | |
423 | break; | |
424 | case BINOP_SUB: | |
425 | strcpy (ptr, "-="); | |
426 | break; | |
427 | case BINOP_MUL: | |
428 | strcpy (ptr, "*="); | |
429 | break; | |
430 | case BINOP_DIV: | |
431 | strcpy (ptr, "/="); | |
432 | break; | |
433 | case BINOP_REM: | |
434 | strcpy (ptr, "%="); | |
435 | break; | |
436 | case BINOP_BITWISE_AND: | |
437 | strcpy (ptr, "&="); | |
438 | break; | |
439 | case BINOP_BITWISE_IOR: | |
440 | strcpy (ptr, "|="); | |
441 | break; | |
442 | case BINOP_BITWISE_XOR: | |
443 | strcpy (ptr, "^="); | |
444 | break; | |
445 | case BINOP_MOD: /* invalid */ | |
c906108c | 446 | default: |
8a3fe4f8 | 447 | error (_("Invalid binary operation specified.")); |
c906108c SS |
448 | } |
449 | break; | |
c5aa993b JM |
450 | case BINOP_SUBSCRIPT: |
451 | strcpy (ptr, "[]"); | |
452 | break; | |
453 | case BINOP_EQUAL: | |
454 | strcpy (ptr, "=="); | |
455 | break; | |
456 | case BINOP_NOTEQUAL: | |
457 | strcpy (ptr, "!="); | |
458 | break; | |
459 | case BINOP_LESS: | |
460 | strcpy (ptr, "<"); | |
461 | break; | |
462 | case BINOP_GTR: | |
463 | strcpy (ptr, ">"); | |
464 | break; | |
465 | case BINOP_GEQ: | |
466 | strcpy (ptr, ">="); | |
467 | break; | |
468 | case BINOP_LEQ: | |
469 | strcpy (ptr, "<="); | |
470 | break; | |
471 | case BINOP_MOD: /* invalid */ | |
c906108c | 472 | default: |
8a3fe4f8 | 473 | error (_("Invalid binary operation specified.")); |
c906108c SS |
474 | } |
475 | ||
c5aa993b JM |
476 | argvec[0] = value_struct_elt (&arg1, argvec + 1, tstr, &static_memfuncp, "structure"); |
477 | ||
c906108c SS |
478 | if (argvec[0]) |
479 | { | |
480 | if (static_memfuncp) | |
481 | { | |
482 | argvec[1] = argvec[0]; | |
483 | argvec++; | |
484 | } | |
485 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
486 | { | |
487 | struct type *return_type; | |
488 | return_type | |
df407dfe | 489 | = TYPE_TARGET_TYPE (check_typedef (value_type (argvec[0]))); |
c906108c SS |
490 | return value_zero (return_type, VALUE_LVAL (arg1)); |
491 | } | |
492 | return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1); | |
493 | } | |
8a3fe4f8 | 494 | error (_("member function %s not found"), tstr); |
c906108c SS |
495 | #ifdef lint |
496 | return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1); | |
497 | #endif | |
498 | } | |
499 | ||
500 | /* We know that arg1 is a structure, so try to find a unary user | |
501 | defined operator that matches the operator in question. | |
502 | Create an argument vector that calls arg1.operator @ (arg1) | |
503 | and return that value (where '@' is (almost) any unary operator which | |
504 | is legal for GNU C++). */ | |
505 | ||
f23631e4 AC |
506 | struct value * |
507 | value_x_unop (struct value *arg1, enum exp_opcode op, enum noside noside) | |
c906108c | 508 | { |
f23631e4 | 509 | struct value **argvec; |
c906108c SS |
510 | char *ptr, *mangle_ptr; |
511 | char tstr[13], mangle_tstr[13]; | |
491b8946 | 512 | int static_memfuncp, nargs; |
c906108c | 513 | |
994b9211 AC |
514 | arg1 = coerce_ref (arg1); |
515 | arg1 = coerce_enum (arg1); | |
c906108c SS |
516 | |
517 | /* now we know that what we have to do is construct our | |
518 | arg vector and find the right function to call it with. */ | |
519 | ||
df407dfe | 520 | if (TYPE_CODE (check_typedef (value_type (arg1))) != TYPE_CODE_STRUCT) |
8a3fe4f8 | 521 | error (_("Can't do that unary op on that type")); /* FIXME be explicit */ |
c906108c | 522 | |
491b8946 | 523 | argvec = (struct value **) alloca (sizeof (struct value *) * 4); |
c906108c SS |
524 | argvec[1] = value_addr (arg1); |
525 | argvec[2] = 0; | |
526 | ||
491b8946 DJ |
527 | nargs = 1; |
528 | ||
c5aa993b JM |
529 | /* make the right function name up */ |
530 | strcpy (tstr, "operator__"); | |
531 | ptr = tstr + 8; | |
532 | strcpy (mangle_tstr, "__"); | |
533 | mangle_ptr = mangle_tstr + 2; | |
c906108c SS |
534 | switch (op) |
535 | { | |
c5aa993b JM |
536 | case UNOP_PREINCREMENT: |
537 | strcpy (ptr, "++"); | |
538 | break; | |
539 | case UNOP_PREDECREMENT: | |
491b8946 | 540 | strcpy (ptr, "--"); |
c5aa993b JM |
541 | break; |
542 | case UNOP_POSTINCREMENT: | |
543 | strcpy (ptr, "++"); | |
491b8946 DJ |
544 | argvec[2] = value_from_longest (builtin_type_int, 0); |
545 | argvec[3] = 0; | |
546 | nargs ++; | |
c5aa993b JM |
547 | break; |
548 | case UNOP_POSTDECREMENT: | |
491b8946 DJ |
549 | strcpy (ptr, "--"); |
550 | argvec[2] = value_from_longest (builtin_type_int, 0); | |
551 | argvec[3] = 0; | |
552 | nargs ++; | |
c5aa993b JM |
553 | break; |
554 | case UNOP_LOGICAL_NOT: | |
555 | strcpy (ptr, "!"); | |
556 | break; | |
557 | case UNOP_COMPLEMENT: | |
558 | strcpy (ptr, "~"); | |
559 | break; | |
560 | case UNOP_NEG: | |
561 | strcpy (ptr, "-"); | |
562 | break; | |
36e9969c NS |
563 | case UNOP_PLUS: |
564 | strcpy (ptr, "+"); | |
565 | break; | |
c5aa993b JM |
566 | case UNOP_IND: |
567 | strcpy (ptr, "*"); | |
568 | break; | |
c906108c | 569 | default: |
8a3fe4f8 | 570 | error (_("Invalid unary operation specified.")); |
c906108c SS |
571 | } |
572 | ||
c5aa993b | 573 | argvec[0] = value_struct_elt (&arg1, argvec + 1, tstr, &static_memfuncp, "structure"); |
c906108c SS |
574 | |
575 | if (argvec[0]) | |
576 | { | |
577 | if (static_memfuncp) | |
578 | { | |
579 | argvec[1] = argvec[0]; | |
491b8946 | 580 | nargs --; |
c906108c SS |
581 | argvec++; |
582 | } | |
583 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
584 | { | |
585 | struct type *return_type; | |
586 | return_type | |
df407dfe | 587 | = TYPE_TARGET_TYPE (check_typedef (value_type (argvec[0]))); |
c906108c SS |
588 | return value_zero (return_type, VALUE_LVAL (arg1)); |
589 | } | |
491b8946 | 590 | return call_function_by_hand (argvec[0], nargs, argvec + 1); |
c906108c | 591 | } |
8a3fe4f8 | 592 | error (_("member function %s not found"), tstr); |
c5aa993b | 593 | return 0; /* For lint -- never reached */ |
c906108c | 594 | } |
c906108c | 595 | \f |
c5aa993b | 596 | |
c906108c SS |
597 | /* Concatenate two values with the following conditions: |
598 | ||
c5aa993b JM |
599 | (1) Both values must be either bitstring values or character string |
600 | values and the resulting value consists of the concatenation of | |
601 | ARG1 followed by ARG2. | |
c906108c | 602 | |
c5aa993b | 603 | or |
c906108c | 604 | |
c5aa993b JM |
605 | One value must be an integer value and the other value must be |
606 | either a bitstring value or character string value, which is | |
607 | to be repeated by the number of times specified by the integer | |
608 | value. | |
c906108c SS |
609 | |
610 | ||
c5aa993b JM |
611 | (2) Boolean values are also allowed and are treated as bit string |
612 | values of length 1. | |
c906108c | 613 | |
c5aa993b JM |
614 | (3) Character values are also allowed and are treated as character |
615 | string values of length 1. | |
616 | */ | |
c906108c | 617 | |
f23631e4 AC |
618 | struct value * |
619 | value_concat (struct value *arg1, struct value *arg2) | |
c906108c | 620 | { |
f23631e4 AC |
621 | struct value *inval1; |
622 | struct value *inval2; | |
623 | struct value *outval = NULL; | |
c906108c SS |
624 | int inval1len, inval2len; |
625 | int count, idx; | |
626 | char *ptr; | |
627 | char inchar; | |
df407dfe AC |
628 | struct type *type1 = check_typedef (value_type (arg1)); |
629 | struct type *type2 = check_typedef (value_type (arg2)); | |
c906108c | 630 | |
c906108c SS |
631 | /* First figure out if we are dealing with two values to be concatenated |
632 | or a repeat count and a value to be repeated. INVAL1 is set to the | |
633 | first of two concatenated values, or the repeat count. INVAL2 is set | |
634 | to the second of the two concatenated values or the value to be | |
635 | repeated. */ | |
636 | ||
637 | if (TYPE_CODE (type2) == TYPE_CODE_INT) | |
638 | { | |
639 | struct type *tmp = type1; | |
640 | type1 = tmp; | |
641 | tmp = type2; | |
642 | inval1 = arg2; | |
643 | inval2 = arg1; | |
644 | } | |
645 | else | |
646 | { | |
647 | inval1 = arg1; | |
648 | inval2 = arg2; | |
649 | } | |
650 | ||
651 | /* Now process the input values. */ | |
652 | ||
653 | if (TYPE_CODE (type1) == TYPE_CODE_INT) | |
654 | { | |
655 | /* We have a repeat count. Validate the second value and then | |
c5aa993b | 656 | construct a value repeated that many times. */ |
c906108c SS |
657 | if (TYPE_CODE (type2) == TYPE_CODE_STRING |
658 | || TYPE_CODE (type2) == TYPE_CODE_CHAR) | |
659 | { | |
660 | count = longest_to_int (value_as_long (inval1)); | |
661 | inval2len = TYPE_LENGTH (type2); | |
662 | ptr = (char *) alloca (count * inval2len); | |
663 | if (TYPE_CODE (type2) == TYPE_CODE_CHAR) | |
664 | { | |
665 | inchar = (char) unpack_long (type2, | |
0fd88904 | 666 | value_contents (inval2)); |
c906108c SS |
667 | for (idx = 0; idx < count; idx++) |
668 | { | |
669 | *(ptr + idx) = inchar; | |
670 | } | |
671 | } | |
672 | else | |
673 | { | |
674 | for (idx = 0; idx < count; idx++) | |
675 | { | |
0fd88904 | 676 | memcpy (ptr + (idx * inval2len), value_contents (inval2), |
c906108c SS |
677 | inval2len); |
678 | } | |
679 | } | |
680 | outval = value_string (ptr, count * inval2len); | |
681 | } | |
682 | else if (TYPE_CODE (type2) == TYPE_CODE_BITSTRING | |
683 | || TYPE_CODE (type2) == TYPE_CODE_BOOL) | |
684 | { | |
8a3fe4f8 | 685 | error (_("unimplemented support for bitstring/boolean repeats")); |
c906108c SS |
686 | } |
687 | else | |
688 | { | |
8a3fe4f8 | 689 | error (_("can't repeat values of that type")); |
c906108c SS |
690 | } |
691 | } | |
692 | else if (TYPE_CODE (type1) == TYPE_CODE_STRING | |
c5aa993b | 693 | || TYPE_CODE (type1) == TYPE_CODE_CHAR) |
c906108c SS |
694 | { |
695 | /* We have two character strings to concatenate. */ | |
696 | if (TYPE_CODE (type2) != TYPE_CODE_STRING | |
697 | && TYPE_CODE (type2) != TYPE_CODE_CHAR) | |
698 | { | |
8a3fe4f8 | 699 | error (_("Strings can only be concatenated with other strings.")); |
c906108c SS |
700 | } |
701 | inval1len = TYPE_LENGTH (type1); | |
702 | inval2len = TYPE_LENGTH (type2); | |
703 | ptr = (char *) alloca (inval1len + inval2len); | |
704 | if (TYPE_CODE (type1) == TYPE_CODE_CHAR) | |
705 | { | |
0fd88904 | 706 | *ptr = (char) unpack_long (type1, value_contents (inval1)); |
c906108c SS |
707 | } |
708 | else | |
709 | { | |
0fd88904 | 710 | memcpy (ptr, value_contents (inval1), inval1len); |
c906108c SS |
711 | } |
712 | if (TYPE_CODE (type2) == TYPE_CODE_CHAR) | |
713 | { | |
c5aa993b | 714 | *(ptr + inval1len) = |
0fd88904 | 715 | (char) unpack_long (type2, value_contents (inval2)); |
c906108c SS |
716 | } |
717 | else | |
718 | { | |
0fd88904 | 719 | memcpy (ptr + inval1len, value_contents (inval2), inval2len); |
c906108c SS |
720 | } |
721 | outval = value_string (ptr, inval1len + inval2len); | |
722 | } | |
723 | else if (TYPE_CODE (type1) == TYPE_CODE_BITSTRING | |
724 | || TYPE_CODE (type1) == TYPE_CODE_BOOL) | |
725 | { | |
726 | /* We have two bitstrings to concatenate. */ | |
727 | if (TYPE_CODE (type2) != TYPE_CODE_BITSTRING | |
728 | && TYPE_CODE (type2) != TYPE_CODE_BOOL) | |
729 | { | |
8a3fe4f8 | 730 | error (_("Bitstrings or booleans can only be concatenated with other bitstrings or booleans.")); |
c906108c | 731 | } |
8a3fe4f8 | 732 | error (_("unimplemented support for bitstring/boolean concatenation.")); |
c5aa993b | 733 | } |
c906108c SS |
734 | else |
735 | { | |
736 | /* We don't know how to concatenate these operands. */ | |
8a3fe4f8 | 737 | error (_("illegal operands for concatenation.")); |
c906108c SS |
738 | } |
739 | return (outval); | |
740 | } | |
c906108c SS |
741 | \f |
742 | ||
c5aa993b | 743 | |
c906108c SS |
744 | /* Perform a binary operation on two operands which have reasonable |
745 | representations as integers or floats. This includes booleans, | |
746 | characters, integers, or floats. | |
747 | Does not support addition and subtraction on pointers; | |
748 | use value_add or value_sub if you want to handle those possibilities. */ | |
749 | ||
f23631e4 AC |
750 | struct value * |
751 | value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op) | |
c906108c | 752 | { |
f23631e4 | 753 | struct value *val; |
c906108c SS |
754 | struct type *type1, *type2; |
755 | ||
994b9211 AC |
756 | arg1 = coerce_ref (arg1); |
757 | arg2 = coerce_ref (arg2); | |
df407dfe AC |
758 | type1 = check_typedef (value_type (arg1)); |
759 | type2 = check_typedef (value_type (arg2)); | |
c906108c | 760 | |
2de41bce | 761 | if ((TYPE_CODE (type1) != TYPE_CODE_FLT && !is_integral_type (type1)) |
c906108c | 762 | || |
2de41bce | 763 | (TYPE_CODE (type2) != TYPE_CODE_FLT && !is_integral_type (type2))) |
8a3fe4f8 | 764 | error (_("Argument to arithmetic operation not a number or boolean.")); |
c906108c SS |
765 | |
766 | if (TYPE_CODE (type1) == TYPE_CODE_FLT | |
767 | || | |
768 | TYPE_CODE (type2) == TYPE_CODE_FLT) | |
769 | { | |
770 | /* FIXME-if-picky-about-floating-accuracy: Should be doing this | |
c5aa993b JM |
771 | in target format. real.c in GCC probably has the necessary |
772 | code. */ | |
c4093a6a | 773 | DOUBLEST v1, v2, v = 0; |
c906108c SS |
774 | v1 = value_as_double (arg1); |
775 | v2 = value_as_double (arg2); | |
776 | switch (op) | |
777 | { | |
778 | case BINOP_ADD: | |
779 | v = v1 + v2; | |
780 | break; | |
781 | ||
782 | case BINOP_SUB: | |
783 | v = v1 - v2; | |
784 | break; | |
785 | ||
786 | case BINOP_MUL: | |
787 | v = v1 * v2; | |
788 | break; | |
789 | ||
790 | case BINOP_DIV: | |
791 | v = v1 / v2; | |
792 | break; | |
793 | ||
c4093a6a JM |
794 | case BINOP_EXP: |
795 | v = pow (v1, v2); | |
796 | if (errno) | |
8a3fe4f8 | 797 | error (_("Cannot perform exponentiation: %s"), safe_strerror (errno)); |
c4093a6a JM |
798 | break; |
799 | ||
c906108c | 800 | default: |
8a3fe4f8 | 801 | error (_("Integer-only operation on floating point number.")); |
c906108c SS |
802 | } |
803 | ||
804 | /* If either arg was long double, make sure that value is also long | |
c5aa993b | 805 | double. */ |
c906108c | 806 | |
c5aa993b JM |
807 | if (TYPE_LENGTH (type1) * 8 > TARGET_DOUBLE_BIT |
808 | || TYPE_LENGTH (type2) * 8 > TARGET_DOUBLE_BIT) | |
c906108c SS |
809 | val = allocate_value (builtin_type_long_double); |
810 | else | |
811 | val = allocate_value (builtin_type_double); | |
812 | ||
990a07ab | 813 | store_typed_floating (value_contents_raw (val), value_type (val), v); |
c906108c SS |
814 | } |
815 | else if (TYPE_CODE (type1) == TYPE_CODE_BOOL | |
816 | && | |
817 | TYPE_CODE (type2) == TYPE_CODE_BOOL) | |
c5aa993b | 818 | { |
c4093a6a | 819 | LONGEST v1, v2, v = 0; |
c5aa993b JM |
820 | v1 = value_as_long (arg1); |
821 | v2 = value_as_long (arg2); | |
822 | ||
823 | switch (op) | |
824 | { | |
825 | case BINOP_BITWISE_AND: | |
826 | v = v1 & v2; | |
827 | break; | |
828 | ||
829 | case BINOP_BITWISE_IOR: | |
830 | v = v1 | v2; | |
831 | break; | |
832 | ||
833 | case BINOP_BITWISE_XOR: | |
834 | v = v1 ^ v2; | |
c4093a6a JM |
835 | break; |
836 | ||
837 | case BINOP_EQUAL: | |
838 | v = v1 == v2; | |
839 | break; | |
840 | ||
841 | case BINOP_NOTEQUAL: | |
842 | v = v1 != v2; | |
c5aa993b JM |
843 | break; |
844 | ||
845 | default: | |
8a3fe4f8 | 846 | error (_("Invalid operation on booleans.")); |
c5aa993b JM |
847 | } |
848 | ||
849 | val = allocate_value (type1); | |
990a07ab | 850 | store_signed_integer (value_contents_raw (val), |
c5aa993b JM |
851 | TYPE_LENGTH (type1), |
852 | v); | |
853 | } | |
c906108c SS |
854 | else |
855 | /* Integral operations here. */ | |
856 | /* FIXME: Also mixed integral/booleans, with result an integer. */ | |
857 | /* FIXME: This implements ANSI C rules (also correct for C++). | |
1b831c93 | 858 | What about FORTRAN and (the deleted) chill ? */ |
c906108c SS |
859 | { |
860 | unsigned int promoted_len1 = TYPE_LENGTH (type1); | |
861 | unsigned int promoted_len2 = TYPE_LENGTH (type2); | |
862 | int is_unsigned1 = TYPE_UNSIGNED (type1); | |
863 | int is_unsigned2 = TYPE_UNSIGNED (type2); | |
864 | unsigned int result_len; | |
865 | int unsigned_operation; | |
866 | ||
867 | /* Determine type length and signedness after promotion for | |
c5aa993b | 868 | both operands. */ |
c906108c SS |
869 | if (promoted_len1 < TYPE_LENGTH (builtin_type_int)) |
870 | { | |
871 | is_unsigned1 = 0; | |
872 | promoted_len1 = TYPE_LENGTH (builtin_type_int); | |
873 | } | |
874 | if (promoted_len2 < TYPE_LENGTH (builtin_type_int)) | |
875 | { | |
876 | is_unsigned2 = 0; | |
877 | promoted_len2 = TYPE_LENGTH (builtin_type_int); | |
878 | } | |
879 | ||
880 | /* Determine type length of the result, and if the operation should | |
c5aa993b JM |
881 | be done unsigned. |
882 | Use the signedness of the operand with the greater length. | |
883 | If both operands are of equal length, use unsigned operation | |
884 | if one of the operands is unsigned. */ | |
c906108c SS |
885 | if (promoted_len1 > promoted_len2) |
886 | { | |
887 | unsigned_operation = is_unsigned1; | |
888 | result_len = promoted_len1; | |
889 | } | |
890 | else if (promoted_len2 > promoted_len1) | |
891 | { | |
892 | unsigned_operation = is_unsigned2; | |
893 | result_len = promoted_len2; | |
894 | } | |
895 | else | |
896 | { | |
897 | unsigned_operation = is_unsigned1 || is_unsigned2; | |
898 | result_len = promoted_len1; | |
899 | } | |
900 | ||
901 | if (unsigned_operation) | |
902 | { | |
c4093a6a | 903 | ULONGEST v1, v2, v = 0; |
c906108c SS |
904 | v1 = (ULONGEST) value_as_long (arg1); |
905 | v2 = (ULONGEST) value_as_long (arg2); | |
906 | ||
907 | /* Truncate values to the type length of the result. */ | |
908 | if (result_len < sizeof (ULONGEST)) | |
909 | { | |
910 | v1 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1; | |
911 | v2 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1; | |
912 | } | |
c5aa993b | 913 | |
c906108c SS |
914 | switch (op) |
915 | { | |
916 | case BINOP_ADD: | |
917 | v = v1 + v2; | |
918 | break; | |
c5aa993b | 919 | |
c906108c SS |
920 | case BINOP_SUB: |
921 | v = v1 - v2; | |
922 | break; | |
c5aa993b | 923 | |
c906108c SS |
924 | case BINOP_MUL: |
925 | v = v1 * v2; | |
926 | break; | |
c5aa993b | 927 | |
c906108c SS |
928 | case BINOP_DIV: |
929 | v = v1 / v2; | |
930 | break; | |
c5aa993b | 931 | |
c4093a6a JM |
932 | case BINOP_EXP: |
933 | v = pow (v1, v2); | |
934 | if (errno) | |
8a3fe4f8 | 935 | error (_("Cannot perform exponentiation: %s"), safe_strerror (errno)); |
c4093a6a JM |
936 | break; |
937 | ||
c906108c SS |
938 | case BINOP_REM: |
939 | v = v1 % v2; | |
940 | break; | |
c5aa993b | 941 | |
c906108c SS |
942 | case BINOP_MOD: |
943 | /* Knuth 1.2.4, integer only. Note that unlike the C '%' op, | |
944 | v1 mod 0 has a defined value, v1. */ | |
c906108c SS |
945 | if (v2 == 0) |
946 | { | |
947 | v = v1; | |
948 | } | |
949 | else | |
950 | { | |
c5aa993b | 951 | v = v1 / v2; |
c906108c SS |
952 | /* Note floor(v1/v2) == v1/v2 for unsigned. */ |
953 | v = v1 - (v2 * v); | |
954 | } | |
955 | break; | |
c5aa993b | 956 | |
c906108c SS |
957 | case BINOP_LSH: |
958 | v = v1 << v2; | |
959 | break; | |
c5aa993b | 960 | |
c906108c SS |
961 | case BINOP_RSH: |
962 | v = v1 >> v2; | |
963 | break; | |
c5aa993b | 964 | |
c906108c SS |
965 | case BINOP_BITWISE_AND: |
966 | v = v1 & v2; | |
967 | break; | |
c5aa993b | 968 | |
c906108c SS |
969 | case BINOP_BITWISE_IOR: |
970 | v = v1 | v2; | |
971 | break; | |
c5aa993b | 972 | |
c906108c SS |
973 | case BINOP_BITWISE_XOR: |
974 | v = v1 ^ v2; | |
975 | break; | |
c5aa993b | 976 | |
c906108c SS |
977 | case BINOP_LOGICAL_AND: |
978 | v = v1 && v2; | |
979 | break; | |
c5aa993b | 980 | |
c906108c SS |
981 | case BINOP_LOGICAL_OR: |
982 | v = v1 || v2; | |
983 | break; | |
c5aa993b | 984 | |
c906108c SS |
985 | case BINOP_MIN: |
986 | v = v1 < v2 ? v1 : v2; | |
987 | break; | |
c5aa993b | 988 | |
c906108c SS |
989 | case BINOP_MAX: |
990 | v = v1 > v2 ? v1 : v2; | |
991 | break; | |
992 | ||
993 | case BINOP_EQUAL: | |
994 | v = v1 == v2; | |
995 | break; | |
996 | ||
c4093a6a JM |
997 | case BINOP_NOTEQUAL: |
998 | v = v1 != v2; | |
999 | break; | |
1000 | ||
c906108c SS |
1001 | case BINOP_LESS: |
1002 | v = v1 < v2; | |
1003 | break; | |
c5aa993b | 1004 | |
c906108c | 1005 | default: |
8a3fe4f8 | 1006 | error (_("Invalid binary operation on numbers.")); |
c906108c SS |
1007 | } |
1008 | ||
1009 | /* This is a kludge to get around the fact that we don't | |
1010 | know how to determine the result type from the types of | |
1011 | the operands. (I'm not really sure how much we feel the | |
1012 | need to duplicate the exact rules of the current | |
1013 | language. They can get really hairy. But not to do so | |
1014 | makes it hard to document just what we *do* do). */ | |
1015 | ||
1016 | /* Can't just call init_type because we wouldn't know what | |
1017 | name to give the type. */ | |
1018 | val = allocate_value | |
1019 | (result_len > TARGET_LONG_BIT / HOST_CHAR_BIT | |
1020 | ? builtin_type_unsigned_long_long | |
1021 | : builtin_type_unsigned_long); | |
990a07ab | 1022 | store_unsigned_integer (value_contents_raw (val), |
df407dfe | 1023 | TYPE_LENGTH (value_type (val)), |
c906108c SS |
1024 | v); |
1025 | } | |
1026 | else | |
1027 | { | |
c4093a6a | 1028 | LONGEST v1, v2, v = 0; |
c906108c SS |
1029 | v1 = value_as_long (arg1); |
1030 | v2 = value_as_long (arg2); | |
c5aa993b | 1031 | |
c906108c SS |
1032 | switch (op) |
1033 | { | |
1034 | case BINOP_ADD: | |
1035 | v = v1 + v2; | |
1036 | break; | |
c5aa993b | 1037 | |
c906108c SS |
1038 | case BINOP_SUB: |
1039 | v = v1 - v2; | |
1040 | break; | |
c5aa993b | 1041 | |
c906108c SS |
1042 | case BINOP_MUL: |
1043 | v = v1 * v2; | |
1044 | break; | |
c5aa993b | 1045 | |
c906108c | 1046 | case BINOP_DIV: |
399cfac6 DL |
1047 | if (v2 != 0) |
1048 | v = v1 / v2; | |
1049 | else | |
8a3fe4f8 | 1050 | error (_("Division by zero")); |
c4093a6a JM |
1051 | break; |
1052 | ||
1053 | case BINOP_EXP: | |
1054 | v = pow (v1, v2); | |
1055 | if (errno) | |
8a3fe4f8 | 1056 | error (_("Cannot perform exponentiation: %s"), safe_strerror (errno)); |
c906108c | 1057 | break; |
c5aa993b | 1058 | |
c906108c | 1059 | case BINOP_REM: |
399cfac6 DL |
1060 | if (v2 != 0) |
1061 | v = v1 % v2; | |
1062 | else | |
8a3fe4f8 | 1063 | error (_("Division by zero")); |
c906108c | 1064 | break; |
c5aa993b | 1065 | |
c906108c SS |
1066 | case BINOP_MOD: |
1067 | /* Knuth 1.2.4, integer only. Note that unlike the C '%' op, | |
1068 | X mod 0 has a defined value, X. */ | |
c906108c SS |
1069 | if (v2 == 0) |
1070 | { | |
1071 | v = v1; | |
1072 | } | |
1073 | else | |
1074 | { | |
c5aa993b | 1075 | v = v1 / v2; |
c906108c SS |
1076 | /* Compute floor. */ |
1077 | if (TRUNCATION_TOWARDS_ZERO && (v < 0) && ((v1 % v2) != 0)) | |
1078 | { | |
1079 | v--; | |
1080 | } | |
1081 | v = v1 - (v2 * v); | |
1082 | } | |
1083 | break; | |
c5aa993b | 1084 | |
c906108c SS |
1085 | case BINOP_LSH: |
1086 | v = v1 << v2; | |
1087 | break; | |
c5aa993b | 1088 | |
c906108c SS |
1089 | case BINOP_RSH: |
1090 | v = v1 >> v2; | |
1091 | break; | |
c5aa993b | 1092 | |
c906108c SS |
1093 | case BINOP_BITWISE_AND: |
1094 | v = v1 & v2; | |
1095 | break; | |
c5aa993b | 1096 | |
c906108c SS |
1097 | case BINOP_BITWISE_IOR: |
1098 | v = v1 | v2; | |
1099 | break; | |
c5aa993b | 1100 | |
c906108c SS |
1101 | case BINOP_BITWISE_XOR: |
1102 | v = v1 ^ v2; | |
1103 | break; | |
c5aa993b | 1104 | |
c906108c SS |
1105 | case BINOP_LOGICAL_AND: |
1106 | v = v1 && v2; | |
1107 | break; | |
c5aa993b | 1108 | |
c906108c SS |
1109 | case BINOP_LOGICAL_OR: |
1110 | v = v1 || v2; | |
1111 | break; | |
c5aa993b | 1112 | |
c906108c SS |
1113 | case BINOP_MIN: |
1114 | v = v1 < v2 ? v1 : v2; | |
1115 | break; | |
c5aa993b | 1116 | |
c906108c SS |
1117 | case BINOP_MAX: |
1118 | v = v1 > v2 ? v1 : v2; | |
1119 | break; | |
1120 | ||
1121 | case BINOP_EQUAL: | |
1122 | v = v1 == v2; | |
1123 | break; | |
1124 | ||
1125 | case BINOP_LESS: | |
1126 | v = v1 < v2; | |
1127 | break; | |
c5aa993b | 1128 | |
c906108c | 1129 | default: |
8a3fe4f8 | 1130 | error (_("Invalid binary operation on numbers.")); |
c906108c SS |
1131 | } |
1132 | ||
1133 | /* This is a kludge to get around the fact that we don't | |
1134 | know how to determine the result type from the types of | |
1135 | the operands. (I'm not really sure how much we feel the | |
1136 | need to duplicate the exact rules of the current | |
1137 | language. They can get really hairy. But not to do so | |
1138 | makes it hard to document just what we *do* do). */ | |
1139 | ||
1140 | /* Can't just call init_type because we wouldn't know what | |
1141 | name to give the type. */ | |
1142 | val = allocate_value | |
1143 | (result_len > TARGET_LONG_BIT / HOST_CHAR_BIT | |
1144 | ? builtin_type_long_long | |
1145 | : builtin_type_long); | |
990a07ab | 1146 | store_signed_integer (value_contents_raw (val), |
df407dfe | 1147 | TYPE_LENGTH (value_type (val)), |
c906108c SS |
1148 | v); |
1149 | } | |
1150 | } | |
1151 | ||
1152 | return val; | |
1153 | } | |
1154 | \f | |
1155 | /* Simulate the C operator ! -- return 1 if ARG1 contains zero. */ | |
1156 | ||
1157 | int | |
f23631e4 | 1158 | value_logical_not (struct value *arg1) |
c906108c | 1159 | { |
52f0bd74 | 1160 | int len; |
0fd88904 | 1161 | const bfd_byte *p; |
c906108c SS |
1162 | struct type *type1; |
1163 | ||
994b9211 | 1164 | arg1 = coerce_number (arg1); |
df407dfe | 1165 | type1 = check_typedef (value_type (arg1)); |
c906108c SS |
1166 | |
1167 | if (TYPE_CODE (type1) == TYPE_CODE_FLT) | |
1168 | return 0 == value_as_double (arg1); | |
1169 | ||
1170 | len = TYPE_LENGTH (type1); | |
0fd88904 | 1171 | p = value_contents (arg1); |
c906108c SS |
1172 | |
1173 | while (--len >= 0) | |
1174 | { | |
1175 | if (*p++) | |
1176 | break; | |
1177 | } | |
1178 | ||
1179 | return len < 0; | |
1180 | } | |
1181 | ||
c4093a6a JM |
1182 | /* Perform a comparison on two string values (whose content are not |
1183 | necessarily null terminated) based on their length */ | |
1184 | ||
1185 | static int | |
f23631e4 | 1186 | value_strcmp (struct value *arg1, struct value *arg2) |
c4093a6a | 1187 | { |
df407dfe AC |
1188 | int len1 = TYPE_LENGTH (value_type (arg1)); |
1189 | int len2 = TYPE_LENGTH (value_type (arg2)); | |
0fd88904 AC |
1190 | const bfd_byte *s1 = value_contents (arg1); |
1191 | const bfd_byte *s2 = value_contents (arg2); | |
c4093a6a JM |
1192 | int i, len = len1 < len2 ? len1 : len2; |
1193 | ||
1194 | for (i = 0; i < len; i++) | |
1195 | { | |
1196 | if (s1[i] < s2[i]) | |
1197 | return -1; | |
1198 | else if (s1[i] > s2[i]) | |
1199 | return 1; | |
1200 | else | |
1201 | continue; | |
1202 | } | |
1203 | ||
1204 | if (len1 < len2) | |
1205 | return -1; | |
1206 | else if (len1 > len2) | |
1207 | return 1; | |
1208 | else | |
1209 | return 0; | |
1210 | } | |
1211 | ||
c906108c SS |
1212 | /* Simulate the C operator == by returning a 1 |
1213 | iff ARG1 and ARG2 have equal contents. */ | |
1214 | ||
1215 | int | |
f23631e4 | 1216 | value_equal (struct value *arg1, struct value *arg2) |
c906108c | 1217 | { |
52f0bd74 | 1218 | int len; |
0fd88904 AC |
1219 | const bfd_byte *p1; |
1220 | const bfd_byte *p2; | |
c906108c SS |
1221 | struct type *type1, *type2; |
1222 | enum type_code code1; | |
1223 | enum type_code code2; | |
2de41bce | 1224 | int is_int1, is_int2; |
c906108c | 1225 | |
994b9211 AC |
1226 | arg1 = coerce_array (arg1); |
1227 | arg2 = coerce_array (arg2); | |
c906108c | 1228 | |
df407dfe AC |
1229 | type1 = check_typedef (value_type (arg1)); |
1230 | type2 = check_typedef (value_type (arg2)); | |
c906108c SS |
1231 | code1 = TYPE_CODE (type1); |
1232 | code2 = TYPE_CODE (type2); | |
2de41bce PH |
1233 | is_int1 = is_integral_type (type1); |
1234 | is_int2 = is_integral_type (type2); | |
c906108c | 1235 | |
2de41bce | 1236 | if (is_int1 && is_int2) |
c906108c SS |
1237 | return longest_to_int (value_as_long (value_binop (arg1, arg2, |
1238 | BINOP_EQUAL))); | |
2de41bce PH |
1239 | else if ((code1 == TYPE_CODE_FLT || is_int1) |
1240 | && (code2 == TYPE_CODE_FLT || is_int2)) | |
c906108c SS |
1241 | return value_as_double (arg1) == value_as_double (arg2); |
1242 | ||
1243 | /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever | |
1244 | is bigger. */ | |
2de41bce | 1245 | else if (code1 == TYPE_CODE_PTR && is_int2) |
1aa20aa8 | 1246 | return value_as_address (arg1) == (CORE_ADDR) value_as_long (arg2); |
2de41bce | 1247 | else if (code2 == TYPE_CODE_PTR && is_int1) |
1aa20aa8 | 1248 | return (CORE_ADDR) value_as_long (arg1) == value_as_address (arg2); |
c906108c SS |
1249 | |
1250 | else if (code1 == code2 | |
1251 | && ((len = (int) TYPE_LENGTH (type1)) | |
1252 | == (int) TYPE_LENGTH (type2))) | |
1253 | { | |
0fd88904 AC |
1254 | p1 = value_contents (arg1); |
1255 | p2 = value_contents (arg2); | |
c906108c SS |
1256 | while (--len >= 0) |
1257 | { | |
1258 | if (*p1++ != *p2++) | |
1259 | break; | |
1260 | } | |
1261 | return len < 0; | |
1262 | } | |
c4093a6a JM |
1263 | else if (code1 == TYPE_CODE_STRING && code2 == TYPE_CODE_STRING) |
1264 | { | |
1265 | return value_strcmp (arg1, arg2) == 0; | |
1266 | } | |
c906108c SS |
1267 | else |
1268 | { | |
8a3fe4f8 | 1269 | error (_("Invalid type combination in equality test.")); |
c5aa993b | 1270 | return 0; /* For lint -- never reached */ |
c906108c SS |
1271 | } |
1272 | } | |
1273 | ||
1274 | /* Simulate the C operator < by returning 1 | |
1275 | iff ARG1's contents are less than ARG2's. */ | |
1276 | ||
1277 | int | |
f23631e4 | 1278 | value_less (struct value *arg1, struct value *arg2) |
c906108c | 1279 | { |
52f0bd74 AC |
1280 | enum type_code code1; |
1281 | enum type_code code2; | |
c906108c | 1282 | struct type *type1, *type2; |
2de41bce | 1283 | int is_int1, is_int2; |
c906108c | 1284 | |
994b9211 AC |
1285 | arg1 = coerce_array (arg1); |
1286 | arg2 = coerce_array (arg2); | |
c906108c | 1287 | |
df407dfe AC |
1288 | type1 = check_typedef (value_type (arg1)); |
1289 | type2 = check_typedef (value_type (arg2)); | |
c906108c SS |
1290 | code1 = TYPE_CODE (type1); |
1291 | code2 = TYPE_CODE (type2); | |
2de41bce PH |
1292 | is_int1 = is_integral_type (type1); |
1293 | is_int2 = is_integral_type (type2); | |
c906108c | 1294 | |
2de41bce | 1295 | if (is_int1 && is_int2) |
c906108c SS |
1296 | return longest_to_int (value_as_long (value_binop (arg1, arg2, |
1297 | BINOP_LESS))); | |
2de41bce PH |
1298 | else if ((code1 == TYPE_CODE_FLT || is_int1) |
1299 | && (code2 == TYPE_CODE_FLT || is_int2)) | |
c906108c SS |
1300 | return value_as_double (arg1) < value_as_double (arg2); |
1301 | else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR) | |
1aa20aa8 | 1302 | return value_as_address (arg1) < value_as_address (arg2); |
c906108c SS |
1303 | |
1304 | /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever | |
1305 | is bigger. */ | |
2de41bce | 1306 | else if (code1 == TYPE_CODE_PTR && is_int2) |
1aa20aa8 | 1307 | return value_as_address (arg1) < (CORE_ADDR) value_as_long (arg2); |
2de41bce | 1308 | else if (code2 == TYPE_CODE_PTR && is_int1) |
1aa20aa8 | 1309 | return (CORE_ADDR) value_as_long (arg1) < value_as_address (arg2); |
c4093a6a JM |
1310 | else if (code1 == TYPE_CODE_STRING && code2 == TYPE_CODE_STRING) |
1311 | return value_strcmp (arg1, arg2) < 0; | |
c906108c SS |
1312 | else |
1313 | { | |
8a3fe4f8 | 1314 | error (_("Invalid type combination in ordering comparison.")); |
c906108c SS |
1315 | return 0; |
1316 | } | |
1317 | } | |
1318 | \f | |
36e9969c NS |
1319 | /* The unary operators +, - and ~. They free the argument ARG1. */ |
1320 | ||
1321 | struct value * | |
1322 | value_pos (struct value *arg1) | |
1323 | { | |
1324 | struct type *type; | |
1325 | ||
1326 | arg1 = coerce_ref (arg1); | |
1327 | ||
1328 | type = check_typedef (value_type (arg1)); | |
1329 | ||
1330 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
1331 | return value_from_double (type, value_as_double (arg1)); | |
1332 | else if (is_integral_type (type)) | |
1333 | { | |
1334 | /* Perform integral promotion for ANSI C/C++. FIXME: What about | |
1335 | FORTRAN and (the deleted) chill ? */ | |
1336 | if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int)) | |
1337 | type = builtin_type_int; | |
1338 | ||
1339 | return value_from_longest (type, value_as_long (arg1)); | |
1340 | } | |
1341 | else | |
1342 | { | |
1343 | error ("Argument to positive operation not a number."); | |
1344 | return 0; /* For lint -- never reached */ | |
1345 | } | |
1346 | } | |
c906108c | 1347 | |
f23631e4 AC |
1348 | struct value * |
1349 | value_neg (struct value *arg1) | |
c906108c | 1350 | { |
52f0bd74 | 1351 | struct type *type; |
df407dfe | 1352 | struct type *result_type = value_type (arg1); |
c906108c | 1353 | |
994b9211 | 1354 | arg1 = coerce_ref (arg1); |
c906108c | 1355 | |
df407dfe | 1356 | type = check_typedef (value_type (arg1)); |
c906108c SS |
1357 | |
1358 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
c5aa993b | 1359 | return value_from_double (result_type, -value_as_double (arg1)); |
2de41bce | 1360 | else if (is_integral_type (type)) |
c906108c | 1361 | { |
db034ac5 | 1362 | /* Perform integral promotion for ANSI C/C++. FIXME: What about |
1b831c93 | 1363 | FORTRAN and (the deleted) chill ? */ |
c906108c SS |
1364 | if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int)) |
1365 | result_type = builtin_type_int; | |
1366 | ||
c5aa993b JM |
1367 | return value_from_longest (result_type, -value_as_long (arg1)); |
1368 | } | |
1369 | else | |
1370 | { | |
8a3fe4f8 | 1371 | error (_("Argument to negate operation not a number.")); |
c5aa993b | 1372 | return 0; /* For lint -- never reached */ |
c906108c | 1373 | } |
c906108c SS |
1374 | } |
1375 | ||
f23631e4 AC |
1376 | struct value * |
1377 | value_complement (struct value *arg1) | |
c906108c | 1378 | { |
52f0bd74 | 1379 | struct type *type; |
df407dfe | 1380 | struct type *result_type = value_type (arg1); |
c906108c | 1381 | |
994b9211 | 1382 | arg1 = coerce_ref (arg1); |
c906108c | 1383 | |
df407dfe | 1384 | type = check_typedef (value_type (arg1)); |
c906108c | 1385 | |
2de41bce | 1386 | if (!is_integral_type (type)) |
8a3fe4f8 | 1387 | error (_("Argument to complement operation not an integer or boolean.")); |
c906108c SS |
1388 | |
1389 | /* Perform integral promotion for ANSI C/C++. | |
1390 | FIXME: What about FORTRAN ? */ | |
1391 | if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int)) | |
1392 | result_type = builtin_type_int; | |
1393 | ||
c5aa993b | 1394 | return value_from_longest (result_type, ~value_as_long (arg1)); |
c906108c SS |
1395 | } |
1396 | \f | |
df407dfe | 1397 | /* The INDEX'th bit of SET value whose value_type is TYPE, |
0fd88904 | 1398 | and whose value_contents is valaddr. |
c906108c SS |
1399 | Return -1 if out of range, -2 other error. */ |
1400 | ||
1401 | int | |
c84141d6 | 1402 | value_bit_index (struct type *type, const bfd_byte *valaddr, int index) |
c906108c SS |
1403 | { |
1404 | LONGEST low_bound, high_bound; | |
1405 | LONGEST word; | |
1406 | unsigned rel_index; | |
1407 | struct type *range = TYPE_FIELD_TYPE (type, 0); | |
1408 | if (get_discrete_bounds (range, &low_bound, &high_bound) < 0) | |
1409 | return -2; | |
1410 | if (index < low_bound || index > high_bound) | |
1411 | return -1; | |
1412 | rel_index = index - low_bound; | |
1413 | word = unpack_long (builtin_type_unsigned_char, | |
1414 | valaddr + (rel_index / TARGET_CHAR_BIT)); | |
1415 | rel_index %= TARGET_CHAR_BIT; | |
1416 | if (BITS_BIG_ENDIAN) | |
1417 | rel_index = TARGET_CHAR_BIT - 1 - rel_index; | |
1418 | return (word >> rel_index) & 1; | |
1419 | } | |
1420 | ||
f23631e4 AC |
1421 | struct value * |
1422 | value_in (struct value *element, struct value *set) | |
c906108c SS |
1423 | { |
1424 | int member; | |
df407dfe AC |
1425 | struct type *settype = check_typedef (value_type (set)); |
1426 | struct type *eltype = check_typedef (value_type (element)); | |
c906108c SS |
1427 | if (TYPE_CODE (eltype) == TYPE_CODE_RANGE) |
1428 | eltype = TYPE_TARGET_TYPE (eltype); | |
1429 | if (TYPE_CODE (settype) != TYPE_CODE_SET) | |
8a3fe4f8 | 1430 | error (_("Second argument of 'IN' has wrong type")); |
c906108c SS |
1431 | if (TYPE_CODE (eltype) != TYPE_CODE_INT |
1432 | && TYPE_CODE (eltype) != TYPE_CODE_CHAR | |
1433 | && TYPE_CODE (eltype) != TYPE_CODE_ENUM | |
1434 | && TYPE_CODE (eltype) != TYPE_CODE_BOOL) | |
8a3fe4f8 | 1435 | error (_("First argument of 'IN' has wrong type")); |
0fd88904 | 1436 | member = value_bit_index (settype, value_contents (set), |
c906108c SS |
1437 | value_as_long (element)); |
1438 | if (member < 0) | |
8a3fe4f8 | 1439 | error (_("First argument of 'IN' not in range")); |
c906108c SS |
1440 | return value_from_longest (LA_BOOL_TYPE, member); |
1441 | } | |
1442 | ||
1443 | void | |
fba45db2 | 1444 | _initialize_valarith (void) |
c906108c SS |
1445 | { |
1446 | } |