| 1 | |
| 2 | /* YACC parser for Fortran expressions, for GDB. |
| 3 | Copyright (C) 1986-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Motorola. Adapted from the C parser by Farooq Butt |
| 6 | (fmbutt@engage.sps.mot.com). |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | /* This was blantantly ripped off the C expression parser, please |
| 24 | be aware of that as you look at its basic structure -FMB */ |
| 25 | |
| 26 | /* Parse a F77 expression from text in a string, |
| 27 | and return the result as a struct expression pointer. |
| 28 | That structure contains arithmetic operations in reverse polish, |
| 29 | with constants represented by operations that are followed by special data. |
| 30 | See expression.h for the details of the format. |
| 31 | What is important here is that it can be built up sequentially |
| 32 | during the process of parsing; the lower levels of the tree always |
| 33 | come first in the result. |
| 34 | |
| 35 | Note that malloc's and realloc's in this file are transformed to |
| 36 | xmalloc and xrealloc respectively by the same sed command in the |
| 37 | makefile that remaps any other malloc/realloc inserted by the parser |
| 38 | generator. Doing this with #defines and trying to control the interaction |
| 39 | with include files (<malloc.h> and <stdlib.h> for example) just became |
| 40 | too messy, particularly when such includes can be inserted at random |
| 41 | times by the parser generator. */ |
| 42 | |
| 43 | %{ |
| 44 | |
| 45 | #include "defs.h" |
| 46 | #include "expression.h" |
| 47 | #include "value.h" |
| 48 | #include "parser-defs.h" |
| 49 | #include "language.h" |
| 50 | #include "f-lang.h" |
| 51 | #include "bfd.h" /* Required by objfiles.h. */ |
| 52 | #include "symfile.h" /* Required by objfiles.h. */ |
| 53 | #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */ |
| 54 | #include "block.h" |
| 55 | #include <ctype.h> |
| 56 | #include <algorithm> |
| 57 | #include "type-stack.h" |
| 58 | |
| 59 | #define parse_type(ps) builtin_type (ps->gdbarch ()) |
| 60 | #define parse_f_type(ps) builtin_f_type (ps->gdbarch ()) |
| 61 | |
| 62 | /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, |
| 63 | etc). */ |
| 64 | #define GDB_YY_REMAP_PREFIX f_ |
| 65 | #include "yy-remap.h" |
| 66 | |
| 67 | /* The state of the parser, used internally when we are parsing the |
| 68 | expression. */ |
| 69 | |
| 70 | static struct parser_state *pstate = NULL; |
| 71 | |
| 72 | /* Depth of parentheses. */ |
| 73 | static int paren_depth; |
| 74 | |
| 75 | /* The current type stack. */ |
| 76 | static struct type_stack *type_stack; |
| 77 | |
| 78 | int yyparse (void); |
| 79 | |
| 80 | static int yylex (void); |
| 81 | |
| 82 | static void yyerror (const char *); |
| 83 | |
| 84 | static void growbuf_by_size (int); |
| 85 | |
| 86 | static int match_string_literal (void); |
| 87 | |
| 88 | static void push_kind_type (LONGEST val, struct type *type); |
| 89 | |
| 90 | static struct type *convert_to_kind_type (struct type *basetype, int kind); |
| 91 | |
| 92 | %} |
| 93 | |
| 94 | /* Although the yacc "value" of an expression is not used, |
| 95 | since the result is stored in the structure being created, |
| 96 | other node types do have values. */ |
| 97 | |
| 98 | %union |
| 99 | { |
| 100 | LONGEST lval; |
| 101 | struct { |
| 102 | LONGEST val; |
| 103 | struct type *type; |
| 104 | } typed_val; |
| 105 | struct { |
| 106 | gdb_byte val[16]; |
| 107 | struct type *type; |
| 108 | } typed_val_float; |
| 109 | struct symbol *sym; |
| 110 | struct type *tval; |
| 111 | struct stoken sval; |
| 112 | struct ttype tsym; |
| 113 | struct symtoken ssym; |
| 114 | int voidval; |
| 115 | enum exp_opcode opcode; |
| 116 | struct internalvar *ivar; |
| 117 | |
| 118 | struct type **tvec; |
| 119 | int *ivec; |
| 120 | } |
| 121 | |
| 122 | %{ |
| 123 | /* YYSTYPE gets defined by %union */ |
| 124 | static int parse_number (struct parser_state *, const char *, int, |
| 125 | int, YYSTYPE *); |
| 126 | %} |
| 127 | |
| 128 | %type <voidval> exp type_exp start variable |
| 129 | %type <tval> type typebase |
| 130 | %type <tvec> nonempty_typelist |
| 131 | /* %type <bval> block */ |
| 132 | |
| 133 | /* Fancy type parsing. */ |
| 134 | %type <voidval> func_mod direct_abs_decl abs_decl |
| 135 | %type <tval> ptype |
| 136 | |
| 137 | %token <typed_val> INT |
| 138 | %token <typed_val_float> FLOAT |
| 139 | |
| 140 | /* Both NAME and TYPENAME tokens represent symbols in the input, |
| 141 | and both convey their data as strings. |
| 142 | But a TYPENAME is a string that happens to be defined as a typedef |
| 143 | or builtin type name (such as int or char) |
| 144 | and a NAME is any other symbol. |
| 145 | Contexts where this distinction is not important can use the |
| 146 | nonterminal "name", which matches either NAME or TYPENAME. */ |
| 147 | |
| 148 | %token <sval> STRING_LITERAL |
| 149 | %token <lval> BOOLEAN_LITERAL |
| 150 | %token <ssym> NAME |
| 151 | %token <tsym> TYPENAME |
| 152 | %type <sval> name |
| 153 | %type <ssym> name_not_typename |
| 154 | |
| 155 | /* A NAME_OR_INT is a symbol which is not known in the symbol table, |
| 156 | but which would parse as a valid number in the current input radix. |
| 157 | E.g. "c" when input_radix==16. Depending on the parse, it will be |
| 158 | turned into a name or into a number. */ |
| 159 | |
| 160 | %token <ssym> NAME_OR_INT |
| 161 | |
| 162 | %token SIZEOF KIND |
| 163 | %token ERROR |
| 164 | |
| 165 | /* Special type cases, put in to allow the parser to distinguish different |
| 166 | legal basetypes. */ |
| 167 | %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD |
| 168 | %token LOGICAL_S8_KEYWORD |
| 169 | %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD |
| 170 | %token COMPLEX_KEYWORD |
| 171 | %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD |
| 172 | %token BOOL_AND BOOL_OR BOOL_NOT |
| 173 | %token SINGLE DOUBLE PRECISION |
| 174 | %token <lval> CHARACTER |
| 175 | |
| 176 | %token <voidval> DOLLAR_VARIABLE |
| 177 | |
| 178 | %token <opcode> ASSIGN_MODIFY |
| 179 | %token <opcode> UNOP_INTRINSIC BINOP_INTRINSIC |
| 180 | |
| 181 | %left ',' |
| 182 | %left ABOVE_COMMA |
| 183 | %right '=' ASSIGN_MODIFY |
| 184 | %right '?' |
| 185 | %left BOOL_OR |
| 186 | %right BOOL_NOT |
| 187 | %left BOOL_AND |
| 188 | %left '|' |
| 189 | %left '^' |
| 190 | %left '&' |
| 191 | %left EQUAL NOTEQUAL |
| 192 | %left LESSTHAN GREATERTHAN LEQ GEQ |
| 193 | %left LSH RSH |
| 194 | %left '@' |
| 195 | %left '+' '-' |
| 196 | %left '*' '/' |
| 197 | %right STARSTAR |
| 198 | %right '%' |
| 199 | %right UNARY |
| 200 | %right '(' |
| 201 | |
| 202 | \f |
| 203 | %% |
| 204 | |
| 205 | start : exp |
| 206 | | type_exp |
| 207 | ; |
| 208 | |
| 209 | type_exp: type |
| 210 | { write_exp_elt_opcode (pstate, OP_TYPE); |
| 211 | write_exp_elt_type (pstate, $1); |
| 212 | write_exp_elt_opcode (pstate, OP_TYPE); } |
| 213 | ; |
| 214 | |
| 215 | exp : '(' exp ')' |
| 216 | { } |
| 217 | ; |
| 218 | |
| 219 | /* Expressions, not including the comma operator. */ |
| 220 | exp : '*' exp %prec UNARY |
| 221 | { write_exp_elt_opcode (pstate, UNOP_IND); } |
| 222 | ; |
| 223 | |
| 224 | exp : '&' exp %prec UNARY |
| 225 | { write_exp_elt_opcode (pstate, UNOP_ADDR); } |
| 226 | ; |
| 227 | |
| 228 | exp : '-' exp %prec UNARY |
| 229 | { write_exp_elt_opcode (pstate, UNOP_NEG); } |
| 230 | ; |
| 231 | |
| 232 | exp : BOOL_NOT exp %prec UNARY |
| 233 | { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); } |
| 234 | ; |
| 235 | |
| 236 | exp : '~' exp %prec UNARY |
| 237 | { write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); } |
| 238 | ; |
| 239 | |
| 240 | exp : SIZEOF exp %prec UNARY |
| 241 | { write_exp_elt_opcode (pstate, UNOP_SIZEOF); } |
| 242 | ; |
| 243 | |
| 244 | exp : KIND '(' exp ')' %prec UNARY |
| 245 | { write_exp_elt_opcode (pstate, UNOP_FORTRAN_KIND); } |
| 246 | ; |
| 247 | |
| 248 | /* No more explicit array operators, we treat everything in F77 as |
| 249 | a function call. The disambiguation as to whether we are |
| 250 | doing a subscript operation or a function call is done |
| 251 | later in eval.c. */ |
| 252 | |
| 253 | exp : exp '(' |
| 254 | { pstate->start_arglist (); } |
| 255 | arglist ')' |
| 256 | { write_exp_elt_opcode (pstate, |
| 257 | OP_F77_UNDETERMINED_ARGLIST); |
| 258 | write_exp_elt_longcst (pstate, |
| 259 | pstate->end_arglist ()); |
| 260 | write_exp_elt_opcode (pstate, |
| 261 | OP_F77_UNDETERMINED_ARGLIST); } |
| 262 | ; |
| 263 | |
| 264 | exp : UNOP_INTRINSIC '(' exp ')' |
| 265 | { write_exp_elt_opcode (pstate, $1); } |
| 266 | ; |
| 267 | |
| 268 | exp : BINOP_INTRINSIC '(' exp ',' exp ')' |
| 269 | { write_exp_elt_opcode (pstate, $1); } |
| 270 | ; |
| 271 | |
| 272 | arglist : |
| 273 | ; |
| 274 | |
| 275 | arglist : exp |
| 276 | { pstate->arglist_len = 1; } |
| 277 | ; |
| 278 | |
| 279 | arglist : subrange |
| 280 | { pstate->arglist_len = 1; } |
| 281 | ; |
| 282 | |
| 283 | arglist : arglist ',' exp %prec ABOVE_COMMA |
| 284 | { pstate->arglist_len++; } |
| 285 | ; |
| 286 | |
| 287 | /* There are four sorts of subrange types in F90. */ |
| 288 | |
| 289 | subrange: exp ':' exp %prec ABOVE_COMMA |
| 290 | { write_exp_elt_opcode (pstate, OP_RANGE); |
| 291 | write_exp_elt_longcst (pstate, NONE_BOUND_DEFAULT); |
| 292 | write_exp_elt_opcode (pstate, OP_RANGE); } |
| 293 | ; |
| 294 | |
| 295 | subrange: exp ':' %prec ABOVE_COMMA |
| 296 | { write_exp_elt_opcode (pstate, OP_RANGE); |
| 297 | write_exp_elt_longcst (pstate, HIGH_BOUND_DEFAULT); |
| 298 | write_exp_elt_opcode (pstate, OP_RANGE); } |
| 299 | ; |
| 300 | |
| 301 | subrange: ':' exp %prec ABOVE_COMMA |
| 302 | { write_exp_elt_opcode (pstate, OP_RANGE); |
| 303 | write_exp_elt_longcst (pstate, LOW_BOUND_DEFAULT); |
| 304 | write_exp_elt_opcode (pstate, OP_RANGE); } |
| 305 | ; |
| 306 | |
| 307 | subrange: ':' %prec ABOVE_COMMA |
| 308 | { write_exp_elt_opcode (pstate, OP_RANGE); |
| 309 | write_exp_elt_longcst (pstate, BOTH_BOUND_DEFAULT); |
| 310 | write_exp_elt_opcode (pstate, OP_RANGE); } |
| 311 | ; |
| 312 | |
| 313 | complexnum: exp ',' exp |
| 314 | { } |
| 315 | ; |
| 316 | |
| 317 | exp : '(' complexnum ')' |
| 318 | { write_exp_elt_opcode (pstate, OP_COMPLEX); |
| 319 | write_exp_elt_type (pstate, |
| 320 | parse_f_type (pstate) |
| 321 | ->builtin_complex_s16); |
| 322 | write_exp_elt_opcode (pstate, OP_COMPLEX); } |
| 323 | ; |
| 324 | |
| 325 | exp : '(' type ')' exp %prec UNARY |
| 326 | { write_exp_elt_opcode (pstate, UNOP_CAST); |
| 327 | write_exp_elt_type (pstate, $2); |
| 328 | write_exp_elt_opcode (pstate, UNOP_CAST); } |
| 329 | ; |
| 330 | |
| 331 | exp : exp '%' name |
| 332 | { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); |
| 333 | write_exp_string (pstate, $3); |
| 334 | write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); } |
| 335 | ; |
| 336 | |
| 337 | /* Binary operators in order of decreasing precedence. */ |
| 338 | |
| 339 | exp : exp '@' exp |
| 340 | { write_exp_elt_opcode (pstate, BINOP_REPEAT); } |
| 341 | ; |
| 342 | |
| 343 | exp : exp STARSTAR exp |
| 344 | { write_exp_elt_opcode (pstate, BINOP_EXP); } |
| 345 | ; |
| 346 | |
| 347 | exp : exp '*' exp |
| 348 | { write_exp_elt_opcode (pstate, BINOP_MUL); } |
| 349 | ; |
| 350 | |
| 351 | exp : exp '/' exp |
| 352 | { write_exp_elt_opcode (pstate, BINOP_DIV); } |
| 353 | ; |
| 354 | |
| 355 | exp : exp '+' exp |
| 356 | { write_exp_elt_opcode (pstate, BINOP_ADD); } |
| 357 | ; |
| 358 | |
| 359 | exp : exp '-' exp |
| 360 | { write_exp_elt_opcode (pstate, BINOP_SUB); } |
| 361 | ; |
| 362 | |
| 363 | exp : exp LSH exp |
| 364 | { write_exp_elt_opcode (pstate, BINOP_LSH); } |
| 365 | ; |
| 366 | |
| 367 | exp : exp RSH exp |
| 368 | { write_exp_elt_opcode (pstate, BINOP_RSH); } |
| 369 | ; |
| 370 | |
| 371 | exp : exp EQUAL exp |
| 372 | { write_exp_elt_opcode (pstate, BINOP_EQUAL); } |
| 373 | ; |
| 374 | |
| 375 | exp : exp NOTEQUAL exp |
| 376 | { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); } |
| 377 | ; |
| 378 | |
| 379 | exp : exp LEQ exp |
| 380 | { write_exp_elt_opcode (pstate, BINOP_LEQ); } |
| 381 | ; |
| 382 | |
| 383 | exp : exp GEQ exp |
| 384 | { write_exp_elt_opcode (pstate, BINOP_GEQ); } |
| 385 | ; |
| 386 | |
| 387 | exp : exp LESSTHAN exp |
| 388 | { write_exp_elt_opcode (pstate, BINOP_LESS); } |
| 389 | ; |
| 390 | |
| 391 | exp : exp GREATERTHAN exp |
| 392 | { write_exp_elt_opcode (pstate, BINOP_GTR); } |
| 393 | ; |
| 394 | |
| 395 | exp : exp '&' exp |
| 396 | { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); } |
| 397 | ; |
| 398 | |
| 399 | exp : exp '^' exp |
| 400 | { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); } |
| 401 | ; |
| 402 | |
| 403 | exp : exp '|' exp |
| 404 | { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); } |
| 405 | ; |
| 406 | |
| 407 | exp : exp BOOL_AND exp |
| 408 | { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); } |
| 409 | ; |
| 410 | |
| 411 | |
| 412 | exp : exp BOOL_OR exp |
| 413 | { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); } |
| 414 | ; |
| 415 | |
| 416 | exp : exp '=' exp |
| 417 | { write_exp_elt_opcode (pstate, BINOP_ASSIGN); } |
| 418 | ; |
| 419 | |
| 420 | exp : exp ASSIGN_MODIFY exp |
| 421 | { write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY); |
| 422 | write_exp_elt_opcode (pstate, $2); |
| 423 | write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY); } |
| 424 | ; |
| 425 | |
| 426 | exp : INT |
| 427 | { write_exp_elt_opcode (pstate, OP_LONG); |
| 428 | write_exp_elt_type (pstate, $1.type); |
| 429 | write_exp_elt_longcst (pstate, (LONGEST) ($1.val)); |
| 430 | write_exp_elt_opcode (pstate, OP_LONG); } |
| 431 | ; |
| 432 | |
| 433 | exp : NAME_OR_INT |
| 434 | { YYSTYPE val; |
| 435 | parse_number (pstate, $1.stoken.ptr, |
| 436 | $1.stoken.length, 0, &val); |
| 437 | write_exp_elt_opcode (pstate, OP_LONG); |
| 438 | write_exp_elt_type (pstate, val.typed_val.type); |
| 439 | write_exp_elt_longcst (pstate, |
| 440 | (LONGEST)val.typed_val.val); |
| 441 | write_exp_elt_opcode (pstate, OP_LONG); } |
| 442 | ; |
| 443 | |
| 444 | exp : FLOAT |
| 445 | { write_exp_elt_opcode (pstate, OP_FLOAT); |
| 446 | write_exp_elt_type (pstate, $1.type); |
| 447 | write_exp_elt_floatcst (pstate, $1.val); |
| 448 | write_exp_elt_opcode (pstate, OP_FLOAT); } |
| 449 | ; |
| 450 | |
| 451 | exp : variable |
| 452 | ; |
| 453 | |
| 454 | exp : DOLLAR_VARIABLE |
| 455 | ; |
| 456 | |
| 457 | exp : SIZEOF '(' type ')' %prec UNARY |
| 458 | { write_exp_elt_opcode (pstate, OP_LONG); |
| 459 | write_exp_elt_type (pstate, |
| 460 | parse_f_type (pstate) |
| 461 | ->builtin_integer); |
| 462 | $3 = check_typedef ($3); |
| 463 | write_exp_elt_longcst (pstate, |
| 464 | (LONGEST) TYPE_LENGTH ($3)); |
| 465 | write_exp_elt_opcode (pstate, OP_LONG); } |
| 466 | ; |
| 467 | |
| 468 | exp : BOOLEAN_LITERAL |
| 469 | { write_exp_elt_opcode (pstate, OP_BOOL); |
| 470 | write_exp_elt_longcst (pstate, (LONGEST) $1); |
| 471 | write_exp_elt_opcode (pstate, OP_BOOL); |
| 472 | } |
| 473 | ; |
| 474 | |
| 475 | exp : STRING_LITERAL |
| 476 | { |
| 477 | write_exp_elt_opcode (pstate, OP_STRING); |
| 478 | write_exp_string (pstate, $1); |
| 479 | write_exp_elt_opcode (pstate, OP_STRING); |
| 480 | } |
| 481 | ; |
| 482 | |
| 483 | variable: name_not_typename |
| 484 | { struct block_symbol sym = $1.sym; |
| 485 | |
| 486 | if (sym.symbol) |
| 487 | { |
| 488 | if (symbol_read_needs_frame (sym.symbol)) |
| 489 | pstate->block_tracker->update (sym); |
| 490 | write_exp_elt_opcode (pstate, OP_VAR_VALUE); |
| 491 | write_exp_elt_block (pstate, sym.block); |
| 492 | write_exp_elt_sym (pstate, sym.symbol); |
| 493 | write_exp_elt_opcode (pstate, OP_VAR_VALUE); |
| 494 | break; |
| 495 | } |
| 496 | else |
| 497 | { |
| 498 | struct bound_minimal_symbol msymbol; |
| 499 | std::string arg = copy_name ($1.stoken); |
| 500 | |
| 501 | msymbol = |
| 502 | lookup_bound_minimal_symbol (arg.c_str ()); |
| 503 | if (msymbol.minsym != NULL) |
| 504 | write_exp_msymbol (pstate, msymbol); |
| 505 | else if (!have_full_symbols () && !have_partial_symbols ()) |
| 506 | error (_("No symbol table is loaded. Use the \"file\" command.")); |
| 507 | else |
| 508 | error (_("No symbol \"%s\" in current context."), |
| 509 | arg.c_str ()); |
| 510 | } |
| 511 | } |
| 512 | ; |
| 513 | |
| 514 | |
| 515 | type : ptype |
| 516 | ; |
| 517 | |
| 518 | ptype : typebase |
| 519 | | typebase abs_decl |
| 520 | { |
| 521 | /* This is where the interesting stuff happens. */ |
| 522 | int done = 0; |
| 523 | int array_size; |
| 524 | struct type *follow_type = $1; |
| 525 | struct type *range_type; |
| 526 | |
| 527 | while (!done) |
| 528 | switch (type_stack->pop ()) |
| 529 | { |
| 530 | case tp_end: |
| 531 | done = 1; |
| 532 | break; |
| 533 | case tp_pointer: |
| 534 | follow_type = lookup_pointer_type (follow_type); |
| 535 | break; |
| 536 | case tp_reference: |
| 537 | follow_type = lookup_lvalue_reference_type (follow_type); |
| 538 | break; |
| 539 | case tp_array: |
| 540 | array_size = type_stack->pop_int (); |
| 541 | if (array_size != -1) |
| 542 | { |
| 543 | range_type = |
| 544 | create_static_range_type ((struct type *) NULL, |
| 545 | parse_f_type (pstate) |
| 546 | ->builtin_integer, |
| 547 | 0, array_size - 1); |
| 548 | follow_type = |
| 549 | create_array_type ((struct type *) NULL, |
| 550 | follow_type, range_type); |
| 551 | } |
| 552 | else |
| 553 | follow_type = lookup_pointer_type (follow_type); |
| 554 | break; |
| 555 | case tp_function: |
| 556 | follow_type = lookup_function_type (follow_type); |
| 557 | break; |
| 558 | case tp_kind: |
| 559 | { |
| 560 | int kind_val = type_stack->pop_int (); |
| 561 | follow_type |
| 562 | = convert_to_kind_type (follow_type, kind_val); |
| 563 | } |
| 564 | break; |
| 565 | } |
| 566 | $$ = follow_type; |
| 567 | } |
| 568 | ; |
| 569 | |
| 570 | abs_decl: '*' |
| 571 | { type_stack->push (tp_pointer); $$ = 0; } |
| 572 | | '*' abs_decl |
| 573 | { type_stack->push (tp_pointer); $$ = $2; } |
| 574 | | '&' |
| 575 | { type_stack->push (tp_reference); $$ = 0; } |
| 576 | | '&' abs_decl |
| 577 | { type_stack->push (tp_reference); $$ = $2; } |
| 578 | | direct_abs_decl |
| 579 | ; |
| 580 | |
| 581 | direct_abs_decl: '(' abs_decl ')' |
| 582 | { $$ = $2; } |
| 583 | | '(' KIND '=' INT ')' |
| 584 | { push_kind_type ($4.val, $4.type); } |
| 585 | | '*' INT |
| 586 | { push_kind_type ($2.val, $2.type); } |
| 587 | | direct_abs_decl func_mod |
| 588 | { type_stack->push (tp_function); } |
| 589 | | func_mod |
| 590 | { type_stack->push (tp_function); } |
| 591 | ; |
| 592 | |
| 593 | func_mod: '(' ')' |
| 594 | { $$ = 0; } |
| 595 | | '(' nonempty_typelist ')' |
| 596 | { free ($2); $$ = 0; } |
| 597 | ; |
| 598 | |
| 599 | typebase /* Implements (approximately): (type-qualifier)* type-specifier */ |
| 600 | : TYPENAME |
| 601 | { $$ = $1.type; } |
| 602 | | INT_KEYWORD |
| 603 | { $$ = parse_f_type (pstate)->builtin_integer; } |
| 604 | | INT_S2_KEYWORD |
| 605 | { $$ = parse_f_type (pstate)->builtin_integer_s2; } |
| 606 | | CHARACTER |
| 607 | { $$ = parse_f_type (pstate)->builtin_character; } |
| 608 | | LOGICAL_S8_KEYWORD |
| 609 | { $$ = parse_f_type (pstate)->builtin_logical_s8; } |
| 610 | | LOGICAL_KEYWORD |
| 611 | { $$ = parse_f_type (pstate)->builtin_logical; } |
| 612 | | LOGICAL_S2_KEYWORD |
| 613 | { $$ = parse_f_type (pstate)->builtin_logical_s2; } |
| 614 | | LOGICAL_S1_KEYWORD |
| 615 | { $$ = parse_f_type (pstate)->builtin_logical_s1; } |
| 616 | | REAL_KEYWORD |
| 617 | { $$ = parse_f_type (pstate)->builtin_real; } |
| 618 | | REAL_S8_KEYWORD |
| 619 | { $$ = parse_f_type (pstate)->builtin_real_s8; } |
| 620 | | REAL_S16_KEYWORD |
| 621 | { $$ = parse_f_type (pstate)->builtin_real_s16; } |
| 622 | | COMPLEX_KEYWORD |
| 623 | { $$ = parse_f_type (pstate)->builtin_complex_s8; } |
| 624 | | COMPLEX_S8_KEYWORD |
| 625 | { $$ = parse_f_type (pstate)->builtin_complex_s8; } |
| 626 | | COMPLEX_S16_KEYWORD |
| 627 | { $$ = parse_f_type (pstate)->builtin_complex_s16; } |
| 628 | | COMPLEX_S32_KEYWORD |
| 629 | { $$ = parse_f_type (pstate)->builtin_complex_s32; } |
| 630 | | SINGLE PRECISION |
| 631 | { $$ = parse_f_type (pstate)->builtin_real;} |
| 632 | | DOUBLE PRECISION |
| 633 | { $$ = parse_f_type (pstate)->builtin_real_s8;} |
| 634 | | SINGLE COMPLEX_KEYWORD |
| 635 | { $$ = parse_f_type (pstate)->builtin_complex_s8;} |
| 636 | | DOUBLE COMPLEX_KEYWORD |
| 637 | { $$ = parse_f_type (pstate)->builtin_complex_s16;} |
| 638 | ; |
| 639 | |
| 640 | nonempty_typelist |
| 641 | : type |
| 642 | { $$ = (struct type **) malloc (sizeof (struct type *) * 2); |
| 643 | $<ivec>$[0] = 1; /* Number of types in vector */ |
| 644 | $$[1] = $1; |
| 645 | } |
| 646 | | nonempty_typelist ',' type |
| 647 | { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1); |
| 648 | $$ = (struct type **) realloc ((char *) $1, len); |
| 649 | $$[$<ivec>$[0]] = $3; |
| 650 | } |
| 651 | ; |
| 652 | |
| 653 | name : NAME |
| 654 | { $$ = $1.stoken; } |
| 655 | ; |
| 656 | |
| 657 | name_not_typename : NAME |
| 658 | /* These would be useful if name_not_typename was useful, but it is just |
| 659 | a fake for "variable", so these cause reduce/reduce conflicts because |
| 660 | the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable, |
| 661 | =exp) or just an exp. If name_not_typename was ever used in an lvalue |
| 662 | context where only a name could occur, this might be useful. |
| 663 | | NAME_OR_INT |
| 664 | */ |
| 665 | ; |
| 666 | |
| 667 | %% |
| 668 | |
| 669 | /* Take care of parsing a number (anything that starts with a digit). |
| 670 | Set yylval and return the token type; update lexptr. |
| 671 | LEN is the number of characters in it. */ |
| 672 | |
| 673 | /*** Needs some error checking for the float case ***/ |
| 674 | |
| 675 | static int |
| 676 | parse_number (struct parser_state *par_state, |
| 677 | const char *p, int len, int parsed_float, YYSTYPE *putithere) |
| 678 | { |
| 679 | LONGEST n = 0; |
| 680 | LONGEST prevn = 0; |
| 681 | int c; |
| 682 | int base = input_radix; |
| 683 | int unsigned_p = 0; |
| 684 | int long_p = 0; |
| 685 | ULONGEST high_bit; |
| 686 | struct type *signed_type; |
| 687 | struct type *unsigned_type; |
| 688 | |
| 689 | if (parsed_float) |
| 690 | { |
| 691 | /* It's a float since it contains a point or an exponent. */ |
| 692 | /* [dD] is not understood as an exponent by parse_float, |
| 693 | change it to 'e'. */ |
| 694 | char *tmp, *tmp2; |
| 695 | |
| 696 | tmp = xstrdup (p); |
| 697 | for (tmp2 = tmp; *tmp2; ++tmp2) |
| 698 | if (*tmp2 == 'd' || *tmp2 == 'D') |
| 699 | *tmp2 = 'e'; |
| 700 | |
| 701 | /* FIXME: Should this use different types? */ |
| 702 | putithere->typed_val_float.type = parse_f_type (pstate)->builtin_real_s8; |
| 703 | bool parsed = parse_float (tmp, len, |
| 704 | putithere->typed_val_float.type, |
| 705 | putithere->typed_val_float.val); |
| 706 | free (tmp); |
| 707 | return parsed? FLOAT : ERROR; |
| 708 | } |
| 709 | |
| 710 | /* Handle base-switching prefixes 0x, 0t, 0d, 0 */ |
| 711 | if (p[0] == '0') |
| 712 | switch (p[1]) |
| 713 | { |
| 714 | case 'x': |
| 715 | case 'X': |
| 716 | if (len >= 3) |
| 717 | { |
| 718 | p += 2; |
| 719 | base = 16; |
| 720 | len -= 2; |
| 721 | } |
| 722 | break; |
| 723 | |
| 724 | case 't': |
| 725 | case 'T': |
| 726 | case 'd': |
| 727 | case 'D': |
| 728 | if (len >= 3) |
| 729 | { |
| 730 | p += 2; |
| 731 | base = 10; |
| 732 | len -= 2; |
| 733 | } |
| 734 | break; |
| 735 | |
| 736 | default: |
| 737 | base = 8; |
| 738 | break; |
| 739 | } |
| 740 | |
| 741 | while (len-- > 0) |
| 742 | { |
| 743 | c = *p++; |
| 744 | if (isupper (c)) |
| 745 | c = tolower (c); |
| 746 | if (len == 0 && c == 'l') |
| 747 | long_p = 1; |
| 748 | else if (len == 0 && c == 'u') |
| 749 | unsigned_p = 1; |
| 750 | else |
| 751 | { |
| 752 | int i; |
| 753 | if (c >= '0' && c <= '9') |
| 754 | i = c - '0'; |
| 755 | else if (c >= 'a' && c <= 'f') |
| 756 | i = c - 'a' + 10; |
| 757 | else |
| 758 | return ERROR; /* Char not a digit */ |
| 759 | if (i >= base) |
| 760 | return ERROR; /* Invalid digit in this base */ |
| 761 | n *= base; |
| 762 | n += i; |
| 763 | } |
| 764 | /* Portably test for overflow (only works for nonzero values, so make |
| 765 | a second check for zero). */ |
| 766 | if ((prevn >= n) && n != 0) |
| 767 | unsigned_p=1; /* Try something unsigned */ |
| 768 | /* If range checking enabled, portably test for unsigned overflow. */ |
| 769 | if (RANGE_CHECK && n != 0) |
| 770 | { |
| 771 | if ((unsigned_p && (unsigned)prevn >= (unsigned)n)) |
| 772 | range_error (_("Overflow on numeric constant.")); |
| 773 | } |
| 774 | prevn = n; |
| 775 | } |
| 776 | |
| 777 | /* If the number is too big to be an int, or it's got an l suffix |
| 778 | then it's a long. Work out if this has to be a long by |
| 779 | shifting right and seeing if anything remains, and the |
| 780 | target int size is different to the target long size. |
| 781 | |
| 782 | In the expression below, we could have tested |
| 783 | (n >> gdbarch_int_bit (parse_gdbarch)) |
| 784 | to see if it was zero, |
| 785 | but too many compilers warn about that, when ints and longs |
| 786 | are the same size. So we shift it twice, with fewer bits |
| 787 | each time, for the same result. */ |
| 788 | |
| 789 | if ((gdbarch_int_bit (par_state->gdbarch ()) |
| 790 | != gdbarch_long_bit (par_state->gdbarch ()) |
| 791 | && ((n >> 2) |
| 792 | >> (gdbarch_int_bit (par_state->gdbarch ())-2))) /* Avoid |
| 793 | shift warning */ |
| 794 | || long_p) |
| 795 | { |
| 796 | high_bit = ((ULONGEST)1) |
| 797 | << (gdbarch_long_bit (par_state->gdbarch ())-1); |
| 798 | unsigned_type = parse_type (par_state)->builtin_unsigned_long; |
| 799 | signed_type = parse_type (par_state)->builtin_long; |
| 800 | } |
| 801 | else |
| 802 | { |
| 803 | high_bit = |
| 804 | ((ULONGEST)1) << (gdbarch_int_bit (par_state->gdbarch ()) - 1); |
| 805 | unsigned_type = parse_type (par_state)->builtin_unsigned_int; |
| 806 | signed_type = parse_type (par_state)->builtin_int; |
| 807 | } |
| 808 | |
| 809 | putithere->typed_val.val = n; |
| 810 | |
| 811 | /* If the high bit of the worked out type is set then this number |
| 812 | has to be unsigned. */ |
| 813 | |
| 814 | if (unsigned_p || (n & high_bit)) |
| 815 | putithere->typed_val.type = unsigned_type; |
| 816 | else |
| 817 | putithere->typed_val.type = signed_type; |
| 818 | |
| 819 | return INT; |
| 820 | } |
| 821 | |
| 822 | /* Called to setup the type stack when we encounter a '(kind=N)' type |
| 823 | modifier, performs some bounds checking on 'N' and then pushes this to |
| 824 | the type stack followed by the 'tp_kind' marker. */ |
| 825 | static void |
| 826 | push_kind_type (LONGEST val, struct type *type) |
| 827 | { |
| 828 | int ival; |
| 829 | |
| 830 | if (TYPE_UNSIGNED (type)) |
| 831 | { |
| 832 | ULONGEST uval = static_cast <ULONGEST> (val); |
| 833 | if (uval > INT_MAX) |
| 834 | error (_("kind value out of range")); |
| 835 | ival = static_cast <int> (uval); |
| 836 | } |
| 837 | else |
| 838 | { |
| 839 | if (val > INT_MAX || val < 0) |
| 840 | error (_("kind value out of range")); |
| 841 | ival = static_cast <int> (val); |
| 842 | } |
| 843 | |
| 844 | type_stack->push (ival); |
| 845 | type_stack->push (tp_kind); |
| 846 | } |
| 847 | |
| 848 | /* Called when a type has a '(kind=N)' modifier after it, for example |
| 849 | 'character(kind=1)'. The BASETYPE is the type described by 'character' |
| 850 | in our example, and KIND is the integer '1'. This function returns a |
| 851 | new type that represents the basetype of a specific kind. */ |
| 852 | static struct type * |
| 853 | convert_to_kind_type (struct type *basetype, int kind) |
| 854 | { |
| 855 | if (basetype == parse_f_type (pstate)->builtin_character) |
| 856 | { |
| 857 | /* Character of kind 1 is a special case, this is the same as the |
| 858 | base character type. */ |
| 859 | if (kind == 1) |
| 860 | return parse_f_type (pstate)->builtin_character; |
| 861 | } |
| 862 | else if (basetype == parse_f_type (pstate)->builtin_complex_s8) |
| 863 | { |
| 864 | if (kind == 4) |
| 865 | return parse_f_type (pstate)->builtin_complex_s8; |
| 866 | else if (kind == 8) |
| 867 | return parse_f_type (pstate)->builtin_complex_s16; |
| 868 | else if (kind == 16) |
| 869 | return parse_f_type (pstate)->builtin_complex_s32; |
| 870 | } |
| 871 | else if (basetype == parse_f_type (pstate)->builtin_real) |
| 872 | { |
| 873 | if (kind == 4) |
| 874 | return parse_f_type (pstate)->builtin_real; |
| 875 | else if (kind == 8) |
| 876 | return parse_f_type (pstate)->builtin_real_s8; |
| 877 | else if (kind == 16) |
| 878 | return parse_f_type (pstate)->builtin_real_s16; |
| 879 | } |
| 880 | else if (basetype == parse_f_type (pstate)->builtin_logical) |
| 881 | { |
| 882 | if (kind == 1) |
| 883 | return parse_f_type (pstate)->builtin_logical_s1; |
| 884 | else if (kind == 2) |
| 885 | return parse_f_type (pstate)->builtin_logical_s2; |
| 886 | else if (kind == 4) |
| 887 | return parse_f_type (pstate)->builtin_logical; |
| 888 | else if (kind == 8) |
| 889 | return parse_f_type (pstate)->builtin_logical_s8; |
| 890 | } |
| 891 | else if (basetype == parse_f_type (pstate)->builtin_integer) |
| 892 | { |
| 893 | if (kind == 2) |
| 894 | return parse_f_type (pstate)->builtin_integer_s2; |
| 895 | else if (kind == 4) |
| 896 | return parse_f_type (pstate)->builtin_integer; |
| 897 | else if (kind == 8) |
| 898 | return parse_f_type (pstate)->builtin_integer_s8; |
| 899 | } |
| 900 | |
| 901 | error (_("unsupported kind %d for type %s"), |
| 902 | kind, TYPE_SAFE_NAME (basetype)); |
| 903 | |
| 904 | /* Should never get here. */ |
| 905 | return nullptr; |
| 906 | } |
| 907 | |
| 908 | struct token |
| 909 | { |
| 910 | /* The string to match against. */ |
| 911 | const char *oper; |
| 912 | |
| 913 | /* The lexer token to return. */ |
| 914 | int token; |
| 915 | |
| 916 | /* The expression opcode to embed within the token. */ |
| 917 | enum exp_opcode opcode; |
| 918 | |
| 919 | /* When this is true the string in OPER is matched exactly including |
| 920 | case, when this is false OPER is matched case insensitively. */ |
| 921 | bool case_sensitive; |
| 922 | }; |
| 923 | |
| 924 | static const struct token dot_ops[] = |
| 925 | { |
| 926 | { ".and.", BOOL_AND, BINOP_END, false }, |
| 927 | { ".or.", BOOL_OR, BINOP_END, false }, |
| 928 | { ".not.", BOOL_NOT, BINOP_END, false }, |
| 929 | { ".eq.", EQUAL, BINOP_END, false }, |
| 930 | { ".eqv.", EQUAL, BINOP_END, false }, |
| 931 | { ".neqv.", NOTEQUAL, BINOP_END, false }, |
| 932 | { ".ne.", NOTEQUAL, BINOP_END, false }, |
| 933 | { ".le.", LEQ, BINOP_END, false }, |
| 934 | { ".ge.", GEQ, BINOP_END, false }, |
| 935 | { ".gt.", GREATERTHAN, BINOP_END, false }, |
| 936 | { ".lt.", LESSTHAN, BINOP_END, false }, |
| 937 | }; |
| 938 | |
| 939 | /* Holds the Fortran representation of a boolean, and the integer value we |
| 940 | substitute in when one of the matching strings is parsed. */ |
| 941 | struct f77_boolean_val |
| 942 | { |
| 943 | /* The string representing a Fortran boolean. */ |
| 944 | const char *name; |
| 945 | |
| 946 | /* The integer value to replace it with. */ |
| 947 | int value; |
| 948 | }; |
| 949 | |
| 950 | /* The set of Fortran booleans. These are matched case insensitively. */ |
| 951 | static const struct f77_boolean_val boolean_values[] = |
| 952 | { |
| 953 | { ".true.", 1 }, |
| 954 | { ".false.", 0 } |
| 955 | }; |
| 956 | |
| 957 | static const struct token f77_keywords[] = |
| 958 | { |
| 959 | /* Historically these have always been lowercase only in GDB. */ |
| 960 | { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END, true }, |
| 961 | { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END, true }, |
| 962 | { "character", CHARACTER, BINOP_END, true }, |
| 963 | { "integer_2", INT_S2_KEYWORD, BINOP_END, true }, |
| 964 | { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END, true }, |
| 965 | { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END, true }, |
| 966 | { "logical_8", LOGICAL_S8_KEYWORD, BINOP_END, true }, |
| 967 | { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END, true }, |
| 968 | { "integer", INT_KEYWORD, BINOP_END, true }, |
| 969 | { "logical", LOGICAL_KEYWORD, BINOP_END, true }, |
| 970 | { "real_16", REAL_S16_KEYWORD, BINOP_END, true }, |
| 971 | { "complex", COMPLEX_KEYWORD, BINOP_END, true }, |
| 972 | { "sizeof", SIZEOF, BINOP_END, true }, |
| 973 | { "real_8", REAL_S8_KEYWORD, BINOP_END, true }, |
| 974 | { "real", REAL_KEYWORD, BINOP_END, true }, |
| 975 | { "single", SINGLE, BINOP_END, true }, |
| 976 | { "double", DOUBLE, BINOP_END, true }, |
| 977 | { "precision", PRECISION, BINOP_END, true }, |
| 978 | /* The following correspond to actual functions in Fortran and are case |
| 979 | insensitive. */ |
| 980 | { "kind", KIND, BINOP_END, false }, |
| 981 | { "abs", UNOP_INTRINSIC, UNOP_ABS, false }, |
| 982 | { "mod", BINOP_INTRINSIC, BINOP_MOD, false }, |
| 983 | { "floor", UNOP_INTRINSIC, UNOP_FORTRAN_FLOOR, false }, |
| 984 | { "ceiling", UNOP_INTRINSIC, UNOP_FORTRAN_CEILING, false }, |
| 985 | { "modulo", BINOP_INTRINSIC, BINOP_FORTRAN_MODULO, false }, |
| 986 | { "cmplx", BINOP_INTRINSIC, BINOP_FORTRAN_CMPLX, false }, |
| 987 | }; |
| 988 | |
| 989 | /* Implementation of a dynamically expandable buffer for processing input |
| 990 | characters acquired through lexptr and building a value to return in |
| 991 | yylval. Ripped off from ch-exp.y */ |
| 992 | |
| 993 | static char *tempbuf; /* Current buffer contents */ |
| 994 | static int tempbufsize; /* Size of allocated buffer */ |
| 995 | static int tempbufindex; /* Current index into buffer */ |
| 996 | |
| 997 | #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */ |
| 998 | |
| 999 | #define CHECKBUF(size) \ |
| 1000 | do { \ |
| 1001 | if (tempbufindex + (size) >= tempbufsize) \ |
| 1002 | { \ |
| 1003 | growbuf_by_size (size); \ |
| 1004 | } \ |
| 1005 | } while (0); |
| 1006 | |
| 1007 | |
| 1008 | /* Grow the static temp buffer if necessary, including allocating the |
| 1009 | first one on demand. */ |
| 1010 | |
| 1011 | static void |
| 1012 | growbuf_by_size (int count) |
| 1013 | { |
| 1014 | int growby; |
| 1015 | |
| 1016 | growby = std::max (count, GROWBY_MIN_SIZE); |
| 1017 | tempbufsize += growby; |
| 1018 | if (tempbuf == NULL) |
| 1019 | tempbuf = (char *) malloc (tempbufsize); |
| 1020 | else |
| 1021 | tempbuf = (char *) realloc (tempbuf, tempbufsize); |
| 1022 | } |
| 1023 | |
| 1024 | /* Blatantly ripped off from ch-exp.y. This routine recognizes F77 |
| 1025 | string-literals. |
| 1026 | |
| 1027 | Recognize a string literal. A string literal is a nonzero sequence |
| 1028 | of characters enclosed in matching single quotes, except that |
| 1029 | a single character inside single quotes is a character literal, which |
| 1030 | we reject as a string literal. To embed the terminator character inside |
| 1031 | a string, it is simply doubled (I.E. 'this''is''one''string') */ |
| 1032 | |
| 1033 | static int |
| 1034 | match_string_literal (void) |
| 1035 | { |
| 1036 | const char *tokptr = pstate->lexptr; |
| 1037 | |
| 1038 | for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++) |
| 1039 | { |
| 1040 | CHECKBUF (1); |
| 1041 | if (*tokptr == *pstate->lexptr) |
| 1042 | { |
| 1043 | if (*(tokptr + 1) == *pstate->lexptr) |
| 1044 | tokptr++; |
| 1045 | else |
| 1046 | break; |
| 1047 | } |
| 1048 | tempbuf[tempbufindex++] = *tokptr; |
| 1049 | } |
| 1050 | if (*tokptr == '\0' /* no terminator */ |
| 1051 | || tempbufindex == 0) /* no string */ |
| 1052 | return 0; |
| 1053 | else |
| 1054 | { |
| 1055 | tempbuf[tempbufindex] = '\0'; |
| 1056 | yylval.sval.ptr = tempbuf; |
| 1057 | yylval.sval.length = tempbufindex; |
| 1058 | pstate->lexptr = ++tokptr; |
| 1059 | return STRING_LITERAL; |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | /* Read one token, getting characters through lexptr. */ |
| 1064 | |
| 1065 | static int |
| 1066 | yylex (void) |
| 1067 | { |
| 1068 | int c; |
| 1069 | int namelen; |
| 1070 | unsigned int token; |
| 1071 | const char *tokstart; |
| 1072 | |
| 1073 | retry: |
| 1074 | |
| 1075 | pstate->prev_lexptr = pstate->lexptr; |
| 1076 | |
| 1077 | tokstart = pstate->lexptr; |
| 1078 | |
| 1079 | /* First of all, let us make sure we are not dealing with the |
| 1080 | special tokens .true. and .false. which evaluate to 1 and 0. */ |
| 1081 | |
| 1082 | if (*pstate->lexptr == '.') |
| 1083 | { |
| 1084 | for (int i = 0; i < ARRAY_SIZE (boolean_values); i++) |
| 1085 | { |
| 1086 | if (strncasecmp (tokstart, boolean_values[i].name, |
| 1087 | strlen (boolean_values[i].name)) == 0) |
| 1088 | { |
| 1089 | pstate->lexptr += strlen (boolean_values[i].name); |
| 1090 | yylval.lval = boolean_values[i].value; |
| 1091 | return BOOLEAN_LITERAL; |
| 1092 | } |
| 1093 | } |
| 1094 | } |
| 1095 | |
| 1096 | /* See if it is a special .foo. operator. */ |
| 1097 | for (int i = 0; i < ARRAY_SIZE (dot_ops); i++) |
| 1098 | if (strncasecmp (tokstart, dot_ops[i].oper, |
| 1099 | strlen (dot_ops[i].oper)) == 0) |
| 1100 | { |
| 1101 | gdb_assert (!dot_ops[i].case_sensitive); |
| 1102 | pstate->lexptr += strlen (dot_ops[i].oper); |
| 1103 | yylval.opcode = dot_ops[i].opcode; |
| 1104 | return dot_ops[i].token; |
| 1105 | } |
| 1106 | |
| 1107 | /* See if it is an exponentiation operator. */ |
| 1108 | |
| 1109 | if (strncmp (tokstart, "**", 2) == 0) |
| 1110 | { |
| 1111 | pstate->lexptr += 2; |
| 1112 | yylval.opcode = BINOP_EXP; |
| 1113 | return STARSTAR; |
| 1114 | } |
| 1115 | |
| 1116 | switch (c = *tokstart) |
| 1117 | { |
| 1118 | case 0: |
| 1119 | return 0; |
| 1120 | |
| 1121 | case ' ': |
| 1122 | case '\t': |
| 1123 | case '\n': |
| 1124 | pstate->lexptr++; |
| 1125 | goto retry; |
| 1126 | |
| 1127 | case '\'': |
| 1128 | token = match_string_literal (); |
| 1129 | if (token != 0) |
| 1130 | return (token); |
| 1131 | break; |
| 1132 | |
| 1133 | case '(': |
| 1134 | paren_depth++; |
| 1135 | pstate->lexptr++; |
| 1136 | return c; |
| 1137 | |
| 1138 | case ')': |
| 1139 | if (paren_depth == 0) |
| 1140 | return 0; |
| 1141 | paren_depth--; |
| 1142 | pstate->lexptr++; |
| 1143 | return c; |
| 1144 | |
| 1145 | case ',': |
| 1146 | if (pstate->comma_terminates && paren_depth == 0) |
| 1147 | return 0; |
| 1148 | pstate->lexptr++; |
| 1149 | return c; |
| 1150 | |
| 1151 | case '.': |
| 1152 | /* Might be a floating point number. */ |
| 1153 | if (pstate->lexptr[1] < '0' || pstate->lexptr[1] > '9') |
| 1154 | goto symbol; /* Nope, must be a symbol. */ |
| 1155 | /* FALL THRU. */ |
| 1156 | |
| 1157 | case '0': |
| 1158 | case '1': |
| 1159 | case '2': |
| 1160 | case '3': |
| 1161 | case '4': |
| 1162 | case '5': |
| 1163 | case '6': |
| 1164 | case '7': |
| 1165 | case '8': |
| 1166 | case '9': |
| 1167 | { |
| 1168 | /* It's a number. */ |
| 1169 | int got_dot = 0, got_e = 0, got_d = 0, toktype; |
| 1170 | const char *p = tokstart; |
| 1171 | int hex = input_radix > 10; |
| 1172 | |
| 1173 | if (c == '0' && (p[1] == 'x' || p[1] == 'X')) |
| 1174 | { |
| 1175 | p += 2; |
| 1176 | hex = 1; |
| 1177 | } |
| 1178 | else if (c == '0' && (p[1]=='t' || p[1]=='T' |
| 1179 | || p[1]=='d' || p[1]=='D')) |
| 1180 | { |
| 1181 | p += 2; |
| 1182 | hex = 0; |
| 1183 | } |
| 1184 | |
| 1185 | for (;; ++p) |
| 1186 | { |
| 1187 | if (!hex && !got_e && (*p == 'e' || *p == 'E')) |
| 1188 | got_dot = got_e = 1; |
| 1189 | else if (!hex && !got_d && (*p == 'd' || *p == 'D')) |
| 1190 | got_dot = got_d = 1; |
| 1191 | else if (!hex && !got_dot && *p == '.') |
| 1192 | got_dot = 1; |
| 1193 | else if (((got_e && (p[-1] == 'e' || p[-1] == 'E')) |
| 1194 | || (got_d && (p[-1] == 'd' || p[-1] == 'D'))) |
| 1195 | && (*p == '-' || *p == '+')) |
| 1196 | /* This is the sign of the exponent, not the end of the |
| 1197 | number. */ |
| 1198 | continue; |
| 1199 | /* We will take any letters or digits. parse_number will |
| 1200 | complain if past the radix, or if L or U are not final. */ |
| 1201 | else if ((*p < '0' || *p > '9') |
| 1202 | && ((*p < 'a' || *p > 'z') |
| 1203 | && (*p < 'A' || *p > 'Z'))) |
| 1204 | break; |
| 1205 | } |
| 1206 | toktype = parse_number (pstate, tokstart, p - tokstart, |
| 1207 | got_dot|got_e|got_d, |
| 1208 | &yylval); |
| 1209 | if (toktype == ERROR) |
| 1210 | { |
| 1211 | char *err_copy = (char *) alloca (p - tokstart + 1); |
| 1212 | |
| 1213 | memcpy (err_copy, tokstart, p - tokstart); |
| 1214 | err_copy[p - tokstart] = 0; |
| 1215 | error (_("Invalid number \"%s\"."), err_copy); |
| 1216 | } |
| 1217 | pstate->lexptr = p; |
| 1218 | return toktype; |
| 1219 | } |
| 1220 | |
| 1221 | case '+': |
| 1222 | case '-': |
| 1223 | case '*': |
| 1224 | case '/': |
| 1225 | case '%': |
| 1226 | case '|': |
| 1227 | case '&': |
| 1228 | case '^': |
| 1229 | case '~': |
| 1230 | case '!': |
| 1231 | case '@': |
| 1232 | case '<': |
| 1233 | case '>': |
| 1234 | case '[': |
| 1235 | case ']': |
| 1236 | case '?': |
| 1237 | case ':': |
| 1238 | case '=': |
| 1239 | case '{': |
| 1240 | case '}': |
| 1241 | symbol: |
| 1242 | pstate->lexptr++; |
| 1243 | return c; |
| 1244 | } |
| 1245 | |
| 1246 | if (!(c == '_' || c == '$' || c ==':' |
| 1247 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))) |
| 1248 | /* We must have come across a bad character (e.g. ';'). */ |
| 1249 | error (_("Invalid character '%c' in expression."), c); |
| 1250 | |
| 1251 | namelen = 0; |
| 1252 | for (c = tokstart[namelen]; |
| 1253 | (c == '_' || c == '$' || c == ':' || (c >= '0' && c <= '9') |
| 1254 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')); |
| 1255 | c = tokstart[++namelen]); |
| 1256 | |
| 1257 | /* The token "if" terminates the expression and is NOT |
| 1258 | removed from the input stream. */ |
| 1259 | |
| 1260 | if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f') |
| 1261 | return 0; |
| 1262 | |
| 1263 | pstate->lexptr += namelen; |
| 1264 | |
| 1265 | /* Catch specific keywords. */ |
| 1266 | |
| 1267 | for (int i = 0; i < ARRAY_SIZE (f77_keywords); i++) |
| 1268 | if (strlen (f77_keywords[i].oper) == namelen |
| 1269 | && ((!f77_keywords[i].case_sensitive |
| 1270 | && strncasecmp (tokstart, f77_keywords[i].oper, namelen) == 0) |
| 1271 | || (f77_keywords[i].case_sensitive |
| 1272 | && strncmp (tokstart, f77_keywords[i].oper, namelen) == 0))) |
| 1273 | { |
| 1274 | yylval.opcode = f77_keywords[i].opcode; |
| 1275 | return f77_keywords[i].token; |
| 1276 | } |
| 1277 | |
| 1278 | yylval.sval.ptr = tokstart; |
| 1279 | yylval.sval.length = namelen; |
| 1280 | |
| 1281 | if (*tokstart == '$') |
| 1282 | { |
| 1283 | write_dollar_variable (pstate, yylval.sval); |
| 1284 | return DOLLAR_VARIABLE; |
| 1285 | } |
| 1286 | |
| 1287 | /* Use token-type TYPENAME for symbols that happen to be defined |
| 1288 | currently as names of types; NAME for other symbols. |
| 1289 | The caller is not constrained to care about the distinction. */ |
| 1290 | { |
| 1291 | std::string tmp = copy_name (yylval.sval); |
| 1292 | struct block_symbol result; |
| 1293 | enum domain_enum_tag lookup_domains[] = |
| 1294 | { |
| 1295 | STRUCT_DOMAIN, |
| 1296 | VAR_DOMAIN, |
| 1297 | MODULE_DOMAIN |
| 1298 | }; |
| 1299 | int hextype; |
| 1300 | |
| 1301 | for (int i = 0; i < ARRAY_SIZE (lookup_domains); ++i) |
| 1302 | { |
| 1303 | result = lookup_symbol (tmp.c_str (), pstate->expression_context_block, |
| 1304 | lookup_domains[i], NULL); |
| 1305 | if (result.symbol && SYMBOL_CLASS (result.symbol) == LOC_TYPEDEF) |
| 1306 | { |
| 1307 | yylval.tsym.type = SYMBOL_TYPE (result.symbol); |
| 1308 | return TYPENAME; |
| 1309 | } |
| 1310 | |
| 1311 | if (result.symbol) |
| 1312 | break; |
| 1313 | } |
| 1314 | |
| 1315 | yylval.tsym.type |
| 1316 | = language_lookup_primitive_type (pstate->language (), |
| 1317 | pstate->gdbarch (), tmp.c_str ()); |
| 1318 | if (yylval.tsym.type != NULL) |
| 1319 | return TYPENAME; |
| 1320 | |
| 1321 | /* Input names that aren't symbols but ARE valid hex numbers, |
| 1322 | when the input radix permits them, can be names or numbers |
| 1323 | depending on the parse. Note we support radixes > 16 here. */ |
| 1324 | if (!result.symbol |
| 1325 | && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) |
| 1326 | || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10))) |
| 1327 | { |
| 1328 | YYSTYPE newlval; /* Its value is ignored. */ |
| 1329 | hextype = parse_number (pstate, tokstart, namelen, 0, &newlval); |
| 1330 | if (hextype == INT) |
| 1331 | { |
| 1332 | yylval.ssym.sym = result; |
| 1333 | yylval.ssym.is_a_field_of_this = false; |
| 1334 | return NAME_OR_INT; |
| 1335 | } |
| 1336 | } |
| 1337 | |
| 1338 | /* Any other kind of symbol */ |
| 1339 | yylval.ssym.sym = result; |
| 1340 | yylval.ssym.is_a_field_of_this = false; |
| 1341 | return NAME; |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | int |
| 1346 | f_parse (struct parser_state *par_state) |
| 1347 | { |
| 1348 | /* Setting up the parser state. */ |
| 1349 | scoped_restore pstate_restore = make_scoped_restore (&pstate); |
| 1350 | scoped_restore restore_yydebug = make_scoped_restore (&yydebug, |
| 1351 | parser_debug); |
| 1352 | gdb_assert (par_state != NULL); |
| 1353 | pstate = par_state; |
| 1354 | paren_depth = 0; |
| 1355 | |
| 1356 | struct type_stack stack; |
| 1357 | scoped_restore restore_type_stack = make_scoped_restore (&type_stack, |
| 1358 | &stack); |
| 1359 | |
| 1360 | return yyparse (); |
| 1361 | } |
| 1362 | |
| 1363 | static void |
| 1364 | yyerror (const char *msg) |
| 1365 | { |
| 1366 | if (pstate->prev_lexptr) |
| 1367 | pstate->lexptr = pstate->prev_lexptr; |
| 1368 | |
| 1369 | error (_("A %s in expression, near `%s'."), msg, pstate->lexptr); |
| 1370 | } |