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