| 1 | /* Parser for GNU CHILL (CCITT High-Level Language) -*- C -*- |
| 2 | Copyright (C) 1992, 1993, 1995 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | /* Parse a Chill expression from text in a string, |
| 21 | and return the result as a struct expression pointer. |
| 22 | That structure contains arithmetic operations in reverse polish, |
| 23 | with constants represented by operations that are followed by special data. |
| 24 | See expression.h for the details of the format. |
| 25 | What is important here is that it can be built up sequentially |
| 26 | during the process of parsing; the lower levels of the tree always |
| 27 | come first in the result. |
| 28 | |
| 29 | Note that the language accepted by this parser is more liberal |
| 30 | than the one accepted by an actual Chill compiler. For example, the |
| 31 | language rule that a simple name string can not be one of the reserved |
| 32 | simple name strings is not enforced (e.g "case" is not treated as a |
| 33 | reserved name). Another example is that Chill is a strongly typed |
| 34 | language, and certain expressions that violate the type constraints |
| 35 | may still be evaluated if gdb can do so in a meaningful manner, while |
| 36 | such expressions would be rejected by the compiler. The reason for |
| 37 | this more liberal behavior is the philosophy that the debugger |
| 38 | is intended to be a tool that is used by the programmer when things |
| 39 | go wrong, and as such, it should provide as few artificial barriers |
| 40 | to it's use as possible. If it can do something meaningful, even |
| 41 | something that violates language contraints that are enforced by the |
| 42 | compiler, it should do so without complaint. |
| 43 | |
| 44 | */ |
| 45 | |
| 46 | #include "defs.h" |
| 47 | #include "gdb_string.h" |
| 48 | #include <ctype.h> |
| 49 | #include "expression.h" |
| 50 | #include "language.h" |
| 51 | #include "value.h" |
| 52 | #include "parser-defs.h" |
| 53 | #include "ch-lang.h" |
| 54 | #include "bfd.h" /* Required by objfiles.h. */ |
| 55 | #include "symfile.h" /* Required by objfiles.h. */ |
| 56 | #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */ |
| 57 | |
| 58 | #ifdef __GNUC__ |
| 59 | #define INLINE __inline__ |
| 60 | #endif |
| 61 | |
| 62 | typedef union |
| 63 | |
| 64 | { |
| 65 | LONGEST lval; |
| 66 | ULONGEST ulval; |
| 67 | struct { |
| 68 | LONGEST val; |
| 69 | struct type *type; |
| 70 | } typed_val; |
| 71 | double dval; |
| 72 | struct symbol *sym; |
| 73 | struct type *tval; |
| 74 | struct stoken sval; |
| 75 | struct ttype tsym; |
| 76 | struct symtoken ssym; |
| 77 | }YYSTYPE; |
| 78 | |
| 79 | enum ch_terminal { |
| 80 | END_TOKEN = 0, |
| 81 | /* '\001' ... '\xff' come first. */ |
| 82 | OPEN_PAREN = '(', |
| 83 | TOKEN_NOT_READ = 999, |
| 84 | INTEGER_LITERAL, |
| 85 | BOOLEAN_LITERAL, |
| 86 | CHARACTER_LITERAL, |
| 87 | FLOAT_LITERAL, |
| 88 | GENERAL_PROCEDURE_NAME, |
| 89 | LOCATION_NAME, |
| 90 | EMPTINESS_LITERAL, |
| 91 | CHARACTER_STRING_LITERAL, |
| 92 | BIT_STRING_LITERAL, |
| 93 | TYPENAME, |
| 94 | DOT_FIELD_NAME, /* '.' followed by <field name> */ |
| 95 | CASE, |
| 96 | OF, |
| 97 | ESAC, |
| 98 | LOGIOR, |
| 99 | ORIF, |
| 100 | LOGXOR, |
| 101 | LOGAND, |
| 102 | ANDIF, |
| 103 | NOTEQUAL, |
| 104 | GEQ, |
| 105 | LEQ, |
| 106 | IN, |
| 107 | SLASH_SLASH, |
| 108 | MOD, |
| 109 | REM, |
| 110 | NOT, |
| 111 | POINTER, |
| 112 | RECEIVE, |
| 113 | UP, |
| 114 | IF, |
| 115 | THEN, |
| 116 | ELSE, |
| 117 | FI, |
| 118 | ELSIF, |
| 119 | ILLEGAL_TOKEN, |
| 120 | NUM, |
| 121 | PRED, |
| 122 | SUCC, |
| 123 | ABS, |
| 124 | CARD, |
| 125 | MAX_TOKEN, |
| 126 | MIN_TOKEN, |
| 127 | ADDR_TOKEN, |
| 128 | SIZE, |
| 129 | UPPER, |
| 130 | LOWER, |
| 131 | LENGTH, |
| 132 | ARRAY, |
| 133 | GDB_VARIABLE, |
| 134 | GDB_ASSIGNMENT |
| 135 | }; |
| 136 | |
| 137 | /* Forward declarations. */ |
| 138 | |
| 139 | static void write_lower_upper_value PARAMS ((enum exp_opcode, struct type *)); |
| 140 | static enum ch_terminal match_bitstring_literal PARAMS ((void)); |
| 141 | static enum ch_terminal match_integer_literal PARAMS ((void)); |
| 142 | static enum ch_terminal match_character_literal PARAMS ((void)); |
| 143 | static enum ch_terminal match_string_literal PARAMS ((void)); |
| 144 | static enum ch_terminal match_float_literal PARAMS ((void)); |
| 145 | static enum ch_terminal match_float_literal PARAMS ((void)); |
| 146 | static int decode_integer_literal PARAMS ((LONGEST *, char **)); |
| 147 | static int decode_integer_value PARAMS ((int, char **, LONGEST *)); |
| 148 | static char *match_simple_name_string PARAMS ((void)); |
| 149 | static void growbuf_by_size PARAMS ((int)); |
| 150 | static void parse_untyped_expr PARAMS ((void)); |
| 151 | static void parse_if_expression PARAMS ((void)); |
| 152 | static void parse_else_alternative PARAMS ((void)); |
| 153 | static void parse_then_alternative PARAMS ((void)); |
| 154 | static void parse_expr PARAMS ((void)); |
| 155 | static void parse_operand0 PARAMS ((void)); |
| 156 | static void parse_operand1 PARAMS ((void)); |
| 157 | static void parse_operand2 PARAMS ((void)); |
| 158 | static void parse_operand3 PARAMS ((void)); |
| 159 | static void parse_operand4 PARAMS ((void)); |
| 160 | static void parse_operand5 PARAMS ((void)); |
| 161 | static void parse_operand6 PARAMS ((void)); |
| 162 | static void parse_primval PARAMS ((void)); |
| 163 | static void parse_tuple PARAMS ((struct type *)); |
| 164 | static void parse_opt_element_list PARAMS ((struct type *)); |
| 165 | static void parse_tuple_element PARAMS ((struct type *)); |
| 166 | static void parse_named_record_element PARAMS ((void)); |
| 167 | static void parse_call PARAMS ((void)); |
| 168 | static struct type *parse_mode_or_normal_call PARAMS ((void)); |
| 169 | #if 0 |
| 170 | static struct type *parse_mode_call PARAMS ((void)); |
| 171 | #endif |
| 172 | static void parse_unary_call PARAMS ((void)); |
| 173 | static int parse_opt_untyped_expr PARAMS ((void)); |
| 174 | static void parse_case_label PARAMS ((void)); |
| 175 | static int expect PARAMS ((enum ch_terminal, char *)); |
| 176 | static void parse_expr PARAMS ((void)); |
| 177 | static void parse_primval PARAMS ((void)); |
| 178 | static void parse_untyped_expr PARAMS ((void)); |
| 179 | static int parse_opt_untyped_expr PARAMS ((void)); |
| 180 | static void parse_if_expression_body PARAMS((void)); |
| 181 | static enum ch_terminal ch_lex PARAMS ((void)); |
| 182 | INLINE static enum ch_terminal PEEK_TOKEN PARAMS ((void)); |
| 183 | static enum ch_terminal peek_token_ PARAMS ((int)); |
| 184 | static void forward_token_ PARAMS ((void)); |
| 185 | static void require PARAMS ((enum ch_terminal)); |
| 186 | static int check_token PARAMS ((enum ch_terminal)); |
| 187 | |
| 188 | #define MAX_LOOK_AHEAD 2 |
| 189 | static enum ch_terminal terminal_buffer[MAX_LOOK_AHEAD+1] = { |
| 190 | TOKEN_NOT_READ, TOKEN_NOT_READ, TOKEN_NOT_READ}; |
| 191 | static YYSTYPE yylval; |
| 192 | static YYSTYPE val_buffer[MAX_LOOK_AHEAD+1]; |
| 193 | |
| 194 | /*int current_token, lookahead_token;*/ |
| 195 | |
| 196 | INLINE static enum ch_terminal |
| 197 | PEEK_TOKEN() |
| 198 | { |
| 199 | if (terminal_buffer[0] == TOKEN_NOT_READ) |
| 200 | { |
| 201 | terminal_buffer[0] = ch_lex (); |
| 202 | val_buffer[0] = yylval; |
| 203 | } |
| 204 | return terminal_buffer[0]; |
| 205 | } |
| 206 | #define PEEK_LVAL() val_buffer[0] |
| 207 | #define PEEK_TOKEN1() peek_token_(1) |
| 208 | #define PEEK_TOKEN2() peek_token_(2) |
| 209 | static enum ch_terminal |
| 210 | peek_token_ (i) |
| 211 | int i; |
| 212 | { |
| 213 | if (i > MAX_LOOK_AHEAD) |
| 214 | fatal ("internal error - too much lookahead"); |
| 215 | if (terminal_buffer[i] == TOKEN_NOT_READ) |
| 216 | { |
| 217 | terminal_buffer[i] = ch_lex (); |
| 218 | val_buffer[i] = yylval; |
| 219 | } |
| 220 | return terminal_buffer[i]; |
| 221 | } |
| 222 | |
| 223 | #if 0 |
| 224 | |
| 225 | static void |
| 226 | pushback_token (code, node) |
| 227 | enum ch_terminal code; |
| 228 | YYSTYPE node; |
| 229 | { |
| 230 | int i; |
| 231 | if (terminal_buffer[MAX_LOOK_AHEAD] != TOKEN_NOT_READ) |
| 232 | fatal ("internal error - cannot pushback token"); |
| 233 | for (i = MAX_LOOK_AHEAD; i > 0; i--) |
| 234 | { |
| 235 | terminal_buffer[i] = terminal_buffer[i - 1]; |
| 236 | val_buffer[i] = val_buffer[i - 1]; |
| 237 | } |
| 238 | terminal_buffer[0] = code; |
| 239 | val_buffer[0] = node; |
| 240 | } |
| 241 | |
| 242 | #endif |
| 243 | |
| 244 | static void |
| 245 | forward_token_() |
| 246 | { |
| 247 | int i; |
| 248 | for (i = 0; i < MAX_LOOK_AHEAD; i++) |
| 249 | { |
| 250 | terminal_buffer[i] = terminal_buffer[i+1]; |
| 251 | val_buffer[i] = val_buffer[i+1]; |
| 252 | } |
| 253 | terminal_buffer[MAX_LOOK_AHEAD] = TOKEN_NOT_READ; |
| 254 | } |
| 255 | #define FORWARD_TOKEN() forward_token_() |
| 256 | |
| 257 | /* Skip the next token. |
| 258 | if it isn't TOKEN, the parser is broken. */ |
| 259 | |
| 260 | static void |
| 261 | require(token) |
| 262 | enum ch_terminal token; |
| 263 | { |
| 264 | if (PEEK_TOKEN() != token) |
| 265 | { |
| 266 | char buf[80]; |
| 267 | sprintf (buf, "internal parser error - expected token %d", (int)token); |
| 268 | fatal(buf); |
| 269 | } |
| 270 | FORWARD_TOKEN(); |
| 271 | } |
| 272 | |
| 273 | static int |
| 274 | check_token (token) |
| 275 | enum ch_terminal token; |
| 276 | { |
| 277 | if (PEEK_TOKEN() != token) |
| 278 | return 0; |
| 279 | FORWARD_TOKEN (); |
| 280 | return 1; |
| 281 | } |
| 282 | |
| 283 | /* return 0 if expected token was not found, |
| 284 | else return 1. |
| 285 | */ |
| 286 | static int |
| 287 | expect (token, message) |
| 288 | enum ch_terminal token; |
| 289 | char *message; |
| 290 | { |
| 291 | if (PEEK_TOKEN() != token) |
| 292 | { |
| 293 | if (message) |
| 294 | error (message); |
| 295 | else if (token < 256) |
| 296 | error ("syntax error - expected a '%c' here \"%s\"", token, lexptr); |
| 297 | else |
| 298 | error ("syntax error"); |
| 299 | return 0; |
| 300 | } |
| 301 | else |
| 302 | FORWARD_TOKEN(); |
| 303 | return 1; |
| 304 | } |
| 305 | |
| 306 | #if 0 |
| 307 | static tree |
| 308 | parse_opt_name_string (allow_all) |
| 309 | int allow_all; /* 1 if ALL is allowed as a postfix */ |
| 310 | { |
| 311 | int token = PEEK_TOKEN(); |
| 312 | tree name; |
| 313 | if (token != NAME) |
| 314 | { |
| 315 | if (token == ALL && allow_all) |
| 316 | { |
| 317 | FORWARD_TOKEN (); |
| 318 | return ALL_POSTFIX; |
| 319 | } |
| 320 | return NULL_TREE; |
| 321 | } |
| 322 | name = PEEK_LVAL(); |
| 323 | for (;;) |
| 324 | { |
| 325 | FORWARD_TOKEN (); |
| 326 | token = PEEK_TOKEN(); |
| 327 | if (token != '!') |
| 328 | return name; |
| 329 | FORWARD_TOKEN(); |
| 330 | token = PEEK_TOKEN(); |
| 331 | if (token == ALL && allow_all) |
| 332 | return get_identifier3(IDENTIFIER_POINTER (name), "!", "*"); |
| 333 | if (token != NAME) |
| 334 | { |
| 335 | if (pass == 1) |
| 336 | error ("'%s!' is not followed by an identifier", |
| 337 | IDENTIFIER_POINTER (name)); |
| 338 | return name; |
| 339 | } |
| 340 | name = get_identifier3(IDENTIFIER_POINTER(name), |
| 341 | "!", IDENTIFIER_POINTER(PEEK_LVAL())); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | static tree |
| 346 | parse_simple_name_string () |
| 347 | { |
| 348 | int token = PEEK_TOKEN(); |
| 349 | tree name; |
| 350 | if (token != NAME) |
| 351 | { |
| 352 | error ("expected a name here"); |
| 353 | return error_mark_node; |
| 354 | } |
| 355 | name = PEEK_LVAL (); |
| 356 | FORWARD_TOKEN (); |
| 357 | return name; |
| 358 | } |
| 359 | |
| 360 | static tree |
| 361 | parse_name_string () |
| 362 | { |
| 363 | tree name = parse_opt_name_string (0); |
| 364 | if (name) |
| 365 | return name; |
| 366 | if (pass == 1) |
| 367 | error ("expected a name string here"); |
| 368 | return error_mark_node; |
| 369 | } |
| 370 | |
| 371 | /* Matches: <name_string> |
| 372 | Returns if pass 1: the identifier. |
| 373 | Returns if pass 2: a decl or value for identifier. */ |
| 374 | |
| 375 | static tree |
| 376 | parse_name () |
| 377 | { |
| 378 | tree name = parse_name_string (); |
| 379 | if (pass == 1 || ignoring) |
| 380 | return name; |
| 381 | else |
| 382 | { |
| 383 | tree decl = lookup_name (name); |
| 384 | if (decl == NULL_TREE) |
| 385 | { |
| 386 | error ("`%s' undeclared", IDENTIFIER_POINTER (name)); |
| 387 | return error_mark_node; |
| 388 | } |
| 389 | else if (TREE_CODE (TREE_TYPE (decl)) == ERROR_MARK) |
| 390 | return error_mark_node; |
| 391 | else if (TREE_CODE (decl) == CONST_DECL) |
| 392 | return DECL_INITIAL (decl); |
| 393 | else if (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE) |
| 394 | return convert_from_reference (decl); |
| 395 | else |
| 396 | return decl; |
| 397 | } |
| 398 | } |
| 399 | #endif |
| 400 | |
| 401 | #if 0 |
| 402 | static void |
| 403 | pushback_paren_expr (expr) |
| 404 | tree expr; |
| 405 | { |
| 406 | if (pass == 1 && !ignoring) |
| 407 | expr = build1 (PAREN_EXPR, NULL_TREE, expr); |
| 408 | pushback_token (EXPR, expr); |
| 409 | } |
| 410 | #endif |
| 411 | |
| 412 | /* Matches: <case label> */ |
| 413 | |
| 414 | static void |
| 415 | parse_case_label () |
| 416 | { |
| 417 | if (check_token (ELSE)) |
| 418 | error ("ELSE in tuples labels not implemented"); |
| 419 | /* Does not handle the case of a mode name. FIXME */ |
| 420 | parse_expr (); |
| 421 | if (check_token (':')) |
| 422 | { |
| 423 | parse_expr (); |
| 424 | write_exp_elt_opcode (BINOP_RANGE); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | static int |
| 429 | parse_opt_untyped_expr () |
| 430 | { |
| 431 | switch (PEEK_TOKEN ()) |
| 432 | { |
| 433 | case ',': |
| 434 | case ':': |
| 435 | case ')': |
| 436 | return 0; |
| 437 | default: |
| 438 | parse_untyped_expr (); |
| 439 | return 1; |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | static void |
| 444 | parse_unary_call () |
| 445 | { |
| 446 | FORWARD_TOKEN (); |
| 447 | expect ('(', NULL); |
| 448 | parse_expr (); |
| 449 | expect (')', NULL); |
| 450 | } |
| 451 | |
| 452 | /* Parse NAME '(' MODENAME ')'. */ |
| 453 | |
| 454 | #if 0 |
| 455 | |
| 456 | static struct type * |
| 457 | parse_mode_call () |
| 458 | { |
| 459 | struct type *type; |
| 460 | FORWARD_TOKEN (); |
| 461 | expect ('(', NULL); |
| 462 | if (PEEK_TOKEN () != TYPENAME) |
| 463 | error ("expect MODENAME here `%s'", lexptr); |
| 464 | type = PEEK_LVAL().tsym.type; |
| 465 | FORWARD_TOKEN (); |
| 466 | expect (')', NULL); |
| 467 | return type; |
| 468 | } |
| 469 | |
| 470 | #endif |
| 471 | |
| 472 | static struct type * |
| 473 | parse_mode_or_normal_call () |
| 474 | { |
| 475 | struct type *type; |
| 476 | FORWARD_TOKEN (); |
| 477 | expect ('(', NULL); |
| 478 | if (PEEK_TOKEN () == TYPENAME) |
| 479 | { |
| 480 | type = PEEK_LVAL().tsym.type; |
| 481 | FORWARD_TOKEN (); |
| 482 | } |
| 483 | else |
| 484 | { |
| 485 | parse_expr (); |
| 486 | type = NULL; |
| 487 | } |
| 488 | expect (')', NULL); |
| 489 | return type; |
| 490 | } |
| 491 | |
| 492 | /* Parse something that looks like a function call. |
| 493 | Assume we have parsed the function, and are at the '('. */ |
| 494 | |
| 495 | static void |
| 496 | parse_call () |
| 497 | { |
| 498 | int arg_count; |
| 499 | require ('('); |
| 500 | /* This is to save the value of arglist_len |
| 501 | being accumulated for each dimension. */ |
| 502 | start_arglist (); |
| 503 | if (parse_opt_untyped_expr ()) |
| 504 | { |
| 505 | int tok = PEEK_TOKEN (); |
| 506 | arglist_len = 1; |
| 507 | if (tok == UP || tok == ':') |
| 508 | { |
| 509 | FORWARD_TOKEN (); |
| 510 | parse_expr (); |
| 511 | expect (')', "expected ')' to terminate slice"); |
| 512 | end_arglist (); |
| 513 | write_exp_elt_opcode (tok == UP ? TERNOP_SLICE_COUNT |
| 514 | : TERNOP_SLICE); |
| 515 | return; |
| 516 | } |
| 517 | while (check_token (',')) |
| 518 | { |
| 519 | parse_untyped_expr (); |
| 520 | arglist_len++; |
| 521 | } |
| 522 | } |
| 523 | else |
| 524 | arglist_len = 0; |
| 525 | expect (')', NULL); |
| 526 | arg_count = end_arglist (); |
| 527 | write_exp_elt_opcode (MULTI_SUBSCRIPT); |
| 528 | write_exp_elt_longcst (arg_count); |
| 529 | write_exp_elt_opcode (MULTI_SUBSCRIPT); |
| 530 | } |
| 531 | |
| 532 | static void |
| 533 | parse_named_record_element () |
| 534 | { |
| 535 | struct stoken label; |
| 536 | char buf[256]; |
| 537 | |
| 538 | label = PEEK_LVAL ().sval; |
| 539 | sprintf (buf, "expected a field name here `%s'", lexptr); |
| 540 | expect (DOT_FIELD_NAME, buf); |
| 541 | if (check_token (',')) |
| 542 | parse_named_record_element (); |
| 543 | else if (check_token (':')) |
| 544 | parse_expr (); |
| 545 | else |
| 546 | error ("syntax error near `%s' in named record tuple element", lexptr); |
| 547 | write_exp_elt_opcode (OP_LABELED); |
| 548 | write_exp_string (label); |
| 549 | write_exp_elt_opcode (OP_LABELED); |
| 550 | } |
| 551 | |
| 552 | /* Returns one or more TREE_LIST nodes, in reverse order. */ |
| 553 | |
| 554 | static void |
| 555 | parse_tuple_element (type) |
| 556 | struct type *type; |
| 557 | { |
| 558 | if (PEEK_TOKEN () == DOT_FIELD_NAME) |
| 559 | { |
| 560 | /* Parse a labelled structure tuple. */ |
| 561 | parse_named_record_element (); |
| 562 | return; |
| 563 | } |
| 564 | |
| 565 | if (check_token ('(')) |
| 566 | { |
| 567 | if (check_token ('*')) |
| 568 | { |
| 569 | expect (')', "missing ')' after '*' case label list"); |
| 570 | if (type) |
| 571 | { |
| 572 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
| 573 | { |
| 574 | /* do this as a range from low to high */ |
| 575 | struct type *range_type = TYPE_FIELD_TYPE (type, 0); |
| 576 | LONGEST low_bound, high_bound; |
| 577 | if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0) |
| 578 | error ("cannot determine bounds for (*)"); |
| 579 | /* lower bound */ |
| 580 | write_exp_elt_opcode (OP_LONG); |
| 581 | write_exp_elt_type (range_type); |
| 582 | write_exp_elt_longcst (low_bound); |
| 583 | write_exp_elt_opcode (OP_LONG); |
| 584 | /* upper bound */ |
| 585 | write_exp_elt_opcode (OP_LONG); |
| 586 | write_exp_elt_type (range_type); |
| 587 | write_exp_elt_longcst (high_bound); |
| 588 | write_exp_elt_opcode (OP_LONG); |
| 589 | write_exp_elt_opcode (BINOP_RANGE); |
| 590 | } |
| 591 | else |
| 592 | error ("(*) in invalid context"); |
| 593 | } |
| 594 | else |
| 595 | error ("(*) only possible with modename in front of tuple (mode[..])"); |
| 596 | } |
| 597 | else |
| 598 | { |
| 599 | parse_case_label (); |
| 600 | while (check_token (',')) |
| 601 | { |
| 602 | parse_case_label (); |
| 603 | write_exp_elt_opcode (BINOP_COMMA); |
| 604 | } |
| 605 | expect (')', NULL); |
| 606 | } |
| 607 | } |
| 608 | else |
| 609 | parse_untyped_expr (); |
| 610 | if (check_token (':')) |
| 611 | { |
| 612 | /* A powerset range or a labeled Array. */ |
| 613 | parse_untyped_expr (); |
| 614 | write_exp_elt_opcode (BINOP_RANGE); |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | /* Matches: a COMMA-separated list of tuple elements. |
| 619 | Returns a list (of TREE_LIST nodes). */ |
| 620 | static void |
| 621 | parse_opt_element_list (type) |
| 622 | struct type *type; |
| 623 | { |
| 624 | arglist_len = 0; |
| 625 | if (PEEK_TOKEN () == ']') |
| 626 | return; |
| 627 | for (;;) |
| 628 | { |
| 629 | parse_tuple_element (type); |
| 630 | arglist_len++; |
| 631 | if (PEEK_TOKEN () == ']') |
| 632 | break; |
| 633 | if (!check_token (',')) |
| 634 | error ("bad syntax in tuple"); |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | /* Parses: '[' elements ']' |
| 639 | If modename is non-NULL it prefixed the tuple. */ |
| 640 | |
| 641 | static void |
| 642 | parse_tuple (mode) |
| 643 | struct type *mode; |
| 644 | { |
| 645 | struct type *type; |
| 646 | if (mode) |
| 647 | type = check_typedef (mode); |
| 648 | else |
| 649 | type = 0; |
| 650 | require ('['); |
| 651 | start_arglist (); |
| 652 | parse_opt_element_list (type); |
| 653 | expect (']', "missing ']' after tuple"); |
| 654 | write_exp_elt_opcode (OP_ARRAY); |
| 655 | write_exp_elt_longcst ((LONGEST) 0); |
| 656 | write_exp_elt_longcst ((LONGEST) end_arglist () - 1); |
| 657 | write_exp_elt_opcode (OP_ARRAY); |
| 658 | if (type) |
| 659 | { |
| 660 | if (TYPE_CODE (type) != TYPE_CODE_ARRAY |
| 661 | && TYPE_CODE (type) != TYPE_CODE_STRUCT |
| 662 | && TYPE_CODE (type) != TYPE_CODE_SET) |
| 663 | error ("invalid tuple mode"); |
| 664 | write_exp_elt_opcode (UNOP_CAST); |
| 665 | write_exp_elt_type (mode); |
| 666 | write_exp_elt_opcode (UNOP_CAST); |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | static void |
| 671 | parse_primval () |
| 672 | { |
| 673 | struct type *type; |
| 674 | enum exp_opcode op; |
| 675 | char *op_name; |
| 676 | switch (PEEK_TOKEN ()) |
| 677 | { |
| 678 | case INTEGER_LITERAL: |
| 679 | case CHARACTER_LITERAL: |
| 680 | write_exp_elt_opcode (OP_LONG); |
| 681 | write_exp_elt_type (PEEK_LVAL ().typed_val.type); |
| 682 | write_exp_elt_longcst (PEEK_LVAL ().typed_val.val); |
| 683 | write_exp_elt_opcode (OP_LONG); |
| 684 | FORWARD_TOKEN (); |
| 685 | break; |
| 686 | case BOOLEAN_LITERAL: |
| 687 | write_exp_elt_opcode (OP_BOOL); |
| 688 | write_exp_elt_longcst ((LONGEST) PEEK_LVAL ().ulval); |
| 689 | write_exp_elt_opcode (OP_BOOL); |
| 690 | FORWARD_TOKEN (); |
| 691 | break; |
| 692 | case FLOAT_LITERAL: |
| 693 | write_exp_elt_opcode (OP_DOUBLE); |
| 694 | write_exp_elt_type (builtin_type_double); |
| 695 | write_exp_elt_dblcst (PEEK_LVAL ().dval); |
| 696 | write_exp_elt_opcode (OP_DOUBLE); |
| 697 | FORWARD_TOKEN (); |
| 698 | break; |
| 699 | case EMPTINESS_LITERAL: |
| 700 | write_exp_elt_opcode (OP_LONG); |
| 701 | write_exp_elt_type (lookup_pointer_type (builtin_type_void)); |
| 702 | write_exp_elt_longcst (0); |
| 703 | write_exp_elt_opcode (OP_LONG); |
| 704 | FORWARD_TOKEN (); |
| 705 | break; |
| 706 | case CHARACTER_STRING_LITERAL: |
| 707 | write_exp_elt_opcode (OP_STRING); |
| 708 | write_exp_string (PEEK_LVAL ().sval); |
| 709 | write_exp_elt_opcode (OP_STRING); |
| 710 | FORWARD_TOKEN (); |
| 711 | break; |
| 712 | case BIT_STRING_LITERAL: |
| 713 | write_exp_elt_opcode (OP_BITSTRING); |
| 714 | write_exp_bitstring (PEEK_LVAL ().sval); |
| 715 | write_exp_elt_opcode (OP_BITSTRING); |
| 716 | FORWARD_TOKEN (); |
| 717 | break; |
| 718 | case ARRAY: |
| 719 | FORWARD_TOKEN (); |
| 720 | /* This is pseudo-Chill, similar to C's '(TYPE[])EXPR' |
| 721 | which casts to an artificial array. */ |
| 722 | expect ('(', NULL); |
| 723 | expect (')', NULL); |
| 724 | if (PEEK_TOKEN () != TYPENAME) |
| 725 | error ("missing MODENAME after ARRAY()"); |
| 726 | type = PEEK_LVAL().tsym.type; |
| 727 | FORWARD_TOKEN (); |
| 728 | expect ('(', NULL); |
| 729 | parse_expr (); |
| 730 | expect (')', "missing right parenthesis"); |
| 731 | type = create_array_type ((struct type *) NULL, type, |
| 732 | create_range_type ((struct type *) NULL, |
| 733 | builtin_type_int, 0, 0)); |
| 734 | TYPE_ARRAY_UPPER_BOUND_TYPE(type) = BOUND_CANNOT_BE_DETERMINED; |
| 735 | write_exp_elt_opcode (UNOP_CAST); |
| 736 | write_exp_elt_type (type); |
| 737 | write_exp_elt_opcode (UNOP_CAST); |
| 738 | break; |
| 739 | #if 0 |
| 740 | case CONST: |
| 741 | case EXPR: |
| 742 | val = PEEK_LVAL(); |
| 743 | FORWARD_TOKEN (); |
| 744 | break; |
| 745 | #endif |
| 746 | case '(': |
| 747 | FORWARD_TOKEN (); |
| 748 | parse_expr (); |
| 749 | expect (')', "missing right parenthesis"); |
| 750 | break; |
| 751 | case '[': |
| 752 | parse_tuple (NULL); |
| 753 | break; |
| 754 | case GENERAL_PROCEDURE_NAME: |
| 755 | case LOCATION_NAME: |
| 756 | write_exp_elt_opcode (OP_VAR_VALUE); |
| 757 | write_exp_elt_block (NULL); |
| 758 | write_exp_elt_sym (PEEK_LVAL ().ssym.sym); |
| 759 | write_exp_elt_opcode (OP_VAR_VALUE); |
| 760 | FORWARD_TOKEN (); |
| 761 | break; |
| 762 | case GDB_VARIABLE: /* gdb specific */ |
| 763 | FORWARD_TOKEN (); |
| 764 | break; |
| 765 | case NUM: |
| 766 | parse_unary_call (); |
| 767 | write_exp_elt_opcode (UNOP_CAST); |
| 768 | write_exp_elt_type (builtin_type_int); |
| 769 | write_exp_elt_opcode (UNOP_CAST); |
| 770 | break; |
| 771 | case CARD: |
| 772 | parse_unary_call (); |
| 773 | write_exp_elt_opcode (UNOP_CARD); |
| 774 | break; |
| 775 | case MAX_TOKEN: |
| 776 | parse_unary_call (); |
| 777 | write_exp_elt_opcode (UNOP_CHMAX); |
| 778 | break; |
| 779 | case MIN_TOKEN: |
| 780 | parse_unary_call (); |
| 781 | write_exp_elt_opcode (UNOP_CHMIN); |
| 782 | break; |
| 783 | case PRED: op_name = "PRED"; goto unimplemented_unary_builtin; |
| 784 | case SUCC: op_name = "SUCC"; goto unimplemented_unary_builtin; |
| 785 | case ABS: op_name = "ABS"; goto unimplemented_unary_builtin; |
| 786 | unimplemented_unary_builtin: |
| 787 | parse_unary_call (); |
| 788 | error ("not implemented: %s builtin function", op_name); |
| 789 | break; |
| 790 | case ADDR_TOKEN: |
| 791 | parse_unary_call (); |
| 792 | write_exp_elt_opcode (UNOP_ADDR); |
| 793 | break; |
| 794 | case SIZE: |
| 795 | type = parse_mode_or_normal_call (); |
| 796 | if (type) |
| 797 | { write_exp_elt_opcode (OP_LONG); |
| 798 | write_exp_elt_type (builtin_type_int); |
| 799 | CHECK_TYPEDEF (type); |
| 800 | write_exp_elt_longcst ((LONGEST) TYPE_LENGTH (type)); |
| 801 | write_exp_elt_opcode (OP_LONG); |
| 802 | } |
| 803 | else |
| 804 | write_exp_elt_opcode (UNOP_SIZEOF); |
| 805 | break; |
| 806 | case LOWER: |
| 807 | op = UNOP_LOWER; |
| 808 | goto lower_upper; |
| 809 | case UPPER: |
| 810 | op = UNOP_UPPER; |
| 811 | goto lower_upper; |
| 812 | lower_upper: |
| 813 | type = parse_mode_or_normal_call (); |
| 814 | write_lower_upper_value (op, type); |
| 815 | break; |
| 816 | case LENGTH: |
| 817 | parse_unary_call (); |
| 818 | write_exp_elt_opcode (UNOP_LENGTH); |
| 819 | break; |
| 820 | case TYPENAME: |
| 821 | type = PEEK_LVAL ().tsym.type; |
| 822 | FORWARD_TOKEN (); |
| 823 | switch (PEEK_TOKEN()) |
| 824 | { |
| 825 | case '[': |
| 826 | parse_tuple (type); |
| 827 | break; |
| 828 | case '(': |
| 829 | FORWARD_TOKEN (); |
| 830 | parse_expr (); |
| 831 | expect (')', "missing right parenthesis"); |
| 832 | write_exp_elt_opcode (UNOP_CAST); |
| 833 | write_exp_elt_type (type); |
| 834 | write_exp_elt_opcode (UNOP_CAST); |
| 835 | break; |
| 836 | default: |
| 837 | error ("typename in invalid context"); |
| 838 | } |
| 839 | break; |
| 840 | |
| 841 | default: |
| 842 | error ("invalid expression syntax at `%s'", lexptr); |
| 843 | } |
| 844 | for (;;) |
| 845 | { |
| 846 | switch (PEEK_TOKEN ()) |
| 847 | { |
| 848 | case DOT_FIELD_NAME: |
| 849 | write_exp_elt_opcode (STRUCTOP_STRUCT); |
| 850 | write_exp_string (PEEK_LVAL ().sval); |
| 851 | write_exp_elt_opcode (STRUCTOP_STRUCT); |
| 852 | FORWARD_TOKEN (); |
| 853 | continue; |
| 854 | case POINTER: |
| 855 | FORWARD_TOKEN (); |
| 856 | if (PEEK_TOKEN () == TYPENAME) |
| 857 | { |
| 858 | type = PEEK_LVAL ().tsym.type; |
| 859 | write_exp_elt_opcode (UNOP_CAST); |
| 860 | write_exp_elt_type (lookup_pointer_type (type)); |
| 861 | write_exp_elt_opcode (UNOP_CAST); |
| 862 | FORWARD_TOKEN (); |
| 863 | } |
| 864 | write_exp_elt_opcode (UNOP_IND); |
| 865 | continue; |
| 866 | case OPEN_PAREN: |
| 867 | parse_call (); |
| 868 | continue; |
| 869 | case CHARACTER_STRING_LITERAL: |
| 870 | case CHARACTER_LITERAL: |
| 871 | case BIT_STRING_LITERAL: |
| 872 | /* Handle string repetition. (See comment in parse_operand5.) */ |
| 873 | parse_primval (); |
| 874 | write_exp_elt_opcode (MULTI_SUBSCRIPT); |
| 875 | write_exp_elt_longcst (1); |
| 876 | write_exp_elt_opcode (MULTI_SUBSCRIPT); |
| 877 | continue; |
| 878 | case END_TOKEN: |
| 879 | case TOKEN_NOT_READ: |
| 880 | case INTEGER_LITERAL: |
| 881 | case BOOLEAN_LITERAL: |
| 882 | case FLOAT_LITERAL: |
| 883 | case GENERAL_PROCEDURE_NAME: |
| 884 | case LOCATION_NAME: |
| 885 | case EMPTINESS_LITERAL: |
| 886 | case TYPENAME: |
| 887 | case CASE: |
| 888 | case OF: |
| 889 | case ESAC: |
| 890 | case LOGIOR: |
| 891 | case ORIF: |
| 892 | case LOGXOR: |
| 893 | case LOGAND: |
| 894 | case ANDIF: |
| 895 | case NOTEQUAL: |
| 896 | case GEQ: |
| 897 | case LEQ: |
| 898 | case IN: |
| 899 | case SLASH_SLASH: |
| 900 | case MOD: |
| 901 | case REM: |
| 902 | case NOT: |
| 903 | case RECEIVE: |
| 904 | case UP: |
| 905 | case IF: |
| 906 | case THEN: |
| 907 | case ELSE: |
| 908 | case FI: |
| 909 | case ELSIF: |
| 910 | case ILLEGAL_TOKEN: |
| 911 | case NUM: |
| 912 | case PRED: |
| 913 | case SUCC: |
| 914 | case ABS: |
| 915 | case CARD: |
| 916 | case MAX_TOKEN: |
| 917 | case MIN_TOKEN: |
| 918 | case ADDR_TOKEN: |
| 919 | case SIZE: |
| 920 | case UPPER: |
| 921 | case LOWER: |
| 922 | case LENGTH: |
| 923 | case ARRAY: |
| 924 | case GDB_VARIABLE: |
| 925 | case GDB_ASSIGNMENT: |
| 926 | break; |
| 927 | } |
| 928 | break; |
| 929 | } |
| 930 | return; |
| 931 | } |
| 932 | |
| 933 | static void |
| 934 | parse_operand6 () |
| 935 | { |
| 936 | if (check_token (RECEIVE)) |
| 937 | { |
| 938 | parse_primval (); |
| 939 | error ("not implemented: RECEIVE expression"); |
| 940 | } |
| 941 | else if (check_token (POINTER)) |
| 942 | { |
| 943 | parse_primval (); |
| 944 | write_exp_elt_opcode (UNOP_ADDR); |
| 945 | } |
| 946 | else |
| 947 | parse_primval(); |
| 948 | } |
| 949 | |
| 950 | static void |
| 951 | parse_operand5() |
| 952 | { |
| 953 | enum exp_opcode op; |
| 954 | /* We are supposed to be looking for a <string repetition operator>, |
| 955 | but in general we can't distinguish that from a parenthesized |
| 956 | expression. This is especially difficult if we allow the |
| 957 | string operand to be a constant expression (as requested by |
| 958 | some users), and not just a string literal. |
| 959 | Consider: LPRN expr RPRN LPRN expr RPRN |
| 960 | Is that a function call or string repetition? |
| 961 | Instead, we handle string repetition in parse_primval, |
| 962 | and build_generalized_call. */ |
| 963 | switch (PEEK_TOKEN()) |
| 964 | { |
| 965 | case NOT: op = UNOP_LOGICAL_NOT; break; |
| 966 | case '-': op = UNOP_NEG; break; |
| 967 | default: |
| 968 | op = OP_NULL; |
| 969 | } |
| 970 | if (op != OP_NULL) |
| 971 | FORWARD_TOKEN(); |
| 972 | parse_operand6(); |
| 973 | if (op != OP_NULL) |
| 974 | write_exp_elt_opcode (op); |
| 975 | } |
| 976 | |
| 977 | static void |
| 978 | parse_operand4 () |
| 979 | { |
| 980 | enum exp_opcode op; |
| 981 | parse_operand5(); |
| 982 | for (;;) |
| 983 | { |
| 984 | switch (PEEK_TOKEN()) |
| 985 | { |
| 986 | case '*': op = BINOP_MUL; break; |
| 987 | case '/': op = BINOP_DIV; break; |
| 988 | case MOD: op = BINOP_MOD; break; |
| 989 | case REM: op = BINOP_REM; break; |
| 990 | default: |
| 991 | return; |
| 992 | } |
| 993 | FORWARD_TOKEN(); |
| 994 | parse_operand5(); |
| 995 | write_exp_elt_opcode (op); |
| 996 | } |
| 997 | } |
| 998 | |
| 999 | static void |
| 1000 | parse_operand3 () |
| 1001 | { |
| 1002 | enum exp_opcode op; |
| 1003 | parse_operand4 (); |
| 1004 | for (;;) |
| 1005 | { |
| 1006 | switch (PEEK_TOKEN()) |
| 1007 | { |
| 1008 | case '+': op = BINOP_ADD; break; |
| 1009 | case '-': op = BINOP_SUB; break; |
| 1010 | case SLASH_SLASH: op = BINOP_CONCAT; break; |
| 1011 | default: |
| 1012 | return; |
| 1013 | } |
| 1014 | FORWARD_TOKEN(); |
| 1015 | parse_operand4(); |
| 1016 | write_exp_elt_opcode (op); |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | static void |
| 1021 | parse_operand2 () |
| 1022 | { |
| 1023 | enum exp_opcode op; |
| 1024 | parse_operand3 (); |
| 1025 | for (;;) |
| 1026 | { |
| 1027 | if (check_token (IN)) |
| 1028 | { |
| 1029 | parse_operand3(); |
| 1030 | write_exp_elt_opcode (BINOP_IN); |
| 1031 | } |
| 1032 | else |
| 1033 | { |
| 1034 | switch (PEEK_TOKEN()) |
| 1035 | { |
| 1036 | case '>': op = BINOP_GTR; break; |
| 1037 | case GEQ: op = BINOP_GEQ; break; |
| 1038 | case '<': op = BINOP_LESS; break; |
| 1039 | case LEQ: op = BINOP_LEQ; break; |
| 1040 | case '=': op = BINOP_EQUAL; break; |
| 1041 | case NOTEQUAL: op = BINOP_NOTEQUAL; break; |
| 1042 | default: |
| 1043 | return; |
| 1044 | } |
| 1045 | FORWARD_TOKEN(); |
| 1046 | parse_operand3(); |
| 1047 | write_exp_elt_opcode (op); |
| 1048 | } |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | static void |
| 1053 | parse_operand1 () |
| 1054 | { |
| 1055 | enum exp_opcode op; |
| 1056 | parse_operand2 (); |
| 1057 | for (;;) |
| 1058 | { |
| 1059 | switch (PEEK_TOKEN()) |
| 1060 | { |
| 1061 | case LOGAND: op = BINOP_BITWISE_AND; break; |
| 1062 | case ANDIF: op = BINOP_LOGICAL_AND; break; |
| 1063 | default: |
| 1064 | return; |
| 1065 | } |
| 1066 | FORWARD_TOKEN(); |
| 1067 | parse_operand2(); |
| 1068 | write_exp_elt_opcode (op); |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | static void |
| 1073 | parse_operand0 () |
| 1074 | { |
| 1075 | enum exp_opcode op; |
| 1076 | parse_operand1(); |
| 1077 | for (;;) |
| 1078 | { |
| 1079 | switch (PEEK_TOKEN()) |
| 1080 | { |
| 1081 | case LOGIOR: op = BINOP_BITWISE_IOR; break; |
| 1082 | case LOGXOR: op = BINOP_BITWISE_XOR; break; |
| 1083 | case ORIF: op = BINOP_LOGICAL_OR; break; |
| 1084 | default: |
| 1085 | return; |
| 1086 | } |
| 1087 | FORWARD_TOKEN(); |
| 1088 | parse_operand1(); |
| 1089 | write_exp_elt_opcode (op); |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | static void |
| 1094 | parse_expr () |
| 1095 | { |
| 1096 | parse_operand0 (); |
| 1097 | if (check_token (GDB_ASSIGNMENT)) |
| 1098 | { |
| 1099 | parse_expr (); |
| 1100 | write_exp_elt_opcode (BINOP_ASSIGN); |
| 1101 | } |
| 1102 | } |
| 1103 | |
| 1104 | static void |
| 1105 | parse_then_alternative () |
| 1106 | { |
| 1107 | expect (THEN, "missing 'THEN' in 'IF' expression"); |
| 1108 | parse_expr (); |
| 1109 | } |
| 1110 | |
| 1111 | static void |
| 1112 | parse_else_alternative () |
| 1113 | { |
| 1114 | if (check_token (ELSIF)) |
| 1115 | parse_if_expression_body (); |
| 1116 | else if (check_token (ELSE)) |
| 1117 | parse_expr (); |
| 1118 | else |
| 1119 | error ("missing ELSE/ELSIF in IF expression"); |
| 1120 | } |
| 1121 | |
| 1122 | /* Matches: <boolean expression> <then alternative> <else alternative> */ |
| 1123 | |
| 1124 | static void |
| 1125 | parse_if_expression_body () |
| 1126 | { |
| 1127 | parse_expr (); |
| 1128 | parse_then_alternative (); |
| 1129 | parse_else_alternative (); |
| 1130 | write_exp_elt_opcode (TERNOP_COND); |
| 1131 | } |
| 1132 | |
| 1133 | static void |
| 1134 | parse_if_expression () |
| 1135 | { |
| 1136 | require (IF); |
| 1137 | parse_if_expression_body (); |
| 1138 | expect (FI, "missing 'FI' at end of conditional expression"); |
| 1139 | } |
| 1140 | |
| 1141 | /* An <untyped_expr> is a superset of <expr>. It also includes |
| 1142 | <conditional expressions> and untyped <tuples>, whose types |
| 1143 | are not given by their constituents. Hence, these are only |
| 1144 | allowed in certain contexts that expect a certain type. |
| 1145 | You should call convert() to fix up the <untyped_expr>. */ |
| 1146 | |
| 1147 | static void |
| 1148 | parse_untyped_expr () |
| 1149 | { |
| 1150 | switch (PEEK_TOKEN()) |
| 1151 | { |
| 1152 | case IF: |
| 1153 | parse_if_expression (); |
| 1154 | return; |
| 1155 | case CASE: |
| 1156 | error ("not implemented: CASE expression"); |
| 1157 | case '(': |
| 1158 | switch (PEEK_TOKEN1()) |
| 1159 | { |
| 1160 | case IF: |
| 1161 | case CASE: |
| 1162 | goto skip_lprn; |
| 1163 | case '[': |
| 1164 | skip_lprn: |
| 1165 | FORWARD_TOKEN (); |
| 1166 | parse_untyped_expr (); |
| 1167 | expect (')', "missing ')'"); |
| 1168 | return; |
| 1169 | default: ; |
| 1170 | /* fall through */ |
| 1171 | } |
| 1172 | default: |
| 1173 | parse_operand0 (); |
| 1174 | } |
| 1175 | } |
| 1176 | |
| 1177 | int |
| 1178 | chill_parse () |
| 1179 | { |
| 1180 | terminal_buffer[0] = TOKEN_NOT_READ; |
| 1181 | if (PEEK_TOKEN () == TYPENAME && PEEK_TOKEN1 () == END_TOKEN) |
| 1182 | { |
| 1183 | write_exp_elt_opcode(OP_TYPE); |
| 1184 | write_exp_elt_type(PEEK_LVAL ().tsym.type); |
| 1185 | write_exp_elt_opcode(OP_TYPE); |
| 1186 | FORWARD_TOKEN (); |
| 1187 | } |
| 1188 | else |
| 1189 | parse_expr (); |
| 1190 | if (terminal_buffer[0] != END_TOKEN) |
| 1191 | { |
| 1192 | if (comma_terminates && terminal_buffer[0] == ',') |
| 1193 | lexptr--; /* Put the comma back. */ |
| 1194 | else |
| 1195 | error ("Junk after end of expression."); |
| 1196 | } |
| 1197 | return 0; |
| 1198 | } |
| 1199 | |
| 1200 | |
| 1201 | /* Implementation of a dynamically expandable buffer for processing input |
| 1202 | characters acquired through lexptr and building a value to return in |
| 1203 | yylval. */ |
| 1204 | |
| 1205 | static char *tempbuf; /* Current buffer contents */ |
| 1206 | static int tempbufsize; /* Size of allocated buffer */ |
| 1207 | static int tempbufindex; /* Current index into buffer */ |
| 1208 | |
| 1209 | #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */ |
| 1210 | |
| 1211 | #define CHECKBUF(size) \ |
| 1212 | do { \ |
| 1213 | if (tempbufindex + (size) >= tempbufsize) \ |
| 1214 | { \ |
| 1215 | growbuf_by_size (size); \ |
| 1216 | } \ |
| 1217 | } while (0); |
| 1218 | |
| 1219 | /* Grow the static temp buffer if necessary, including allocating the first one |
| 1220 | on demand. */ |
| 1221 | |
| 1222 | static void |
| 1223 | growbuf_by_size (count) |
| 1224 | int count; |
| 1225 | { |
| 1226 | int growby; |
| 1227 | |
| 1228 | growby = max (count, GROWBY_MIN_SIZE); |
| 1229 | tempbufsize += growby; |
| 1230 | if (tempbuf == NULL) |
| 1231 | { |
| 1232 | tempbuf = (char *) xmalloc (tempbufsize); |
| 1233 | } |
| 1234 | else |
| 1235 | { |
| 1236 | tempbuf = (char *) xrealloc (tempbuf, tempbufsize); |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | /* Try to consume a simple name string token. If successful, returns |
| 1241 | a pointer to a nullbyte terminated copy of the name that can be used |
| 1242 | in symbol table lookups. If not successful, returns NULL. */ |
| 1243 | |
| 1244 | static char * |
| 1245 | match_simple_name_string () |
| 1246 | { |
| 1247 | char *tokptr = lexptr; |
| 1248 | |
| 1249 | if (isalpha (*tokptr) || *tokptr == '_') |
| 1250 | { |
| 1251 | char *result; |
| 1252 | do { |
| 1253 | tokptr++; |
| 1254 | } while (isalnum (*tokptr) || (*tokptr == '_')); |
| 1255 | yylval.sval.ptr = lexptr; |
| 1256 | yylval.sval.length = tokptr - lexptr; |
| 1257 | lexptr = tokptr; |
| 1258 | result = copy_name (yylval.sval); |
| 1259 | return result; |
| 1260 | } |
| 1261 | return (NULL); |
| 1262 | } |
| 1263 | |
| 1264 | /* Start looking for a value composed of valid digits as set by the base |
| 1265 | in use. Note that '_' characters are valid anywhere, in any quantity, |
| 1266 | and are simply ignored. Since we must find at least one valid digit, |
| 1267 | or reject this token as an integer literal, we keep track of how many |
| 1268 | digits we have encountered. */ |
| 1269 | |
| 1270 | static int |
| 1271 | decode_integer_value (base, tokptrptr, ivalptr) |
| 1272 | int base; |
| 1273 | char **tokptrptr; |
| 1274 | LONGEST *ivalptr; |
| 1275 | { |
| 1276 | char *tokptr = *tokptrptr; |
| 1277 | int temp; |
| 1278 | int digits = 0; |
| 1279 | |
| 1280 | while (*tokptr != '\0') |
| 1281 | { |
| 1282 | temp = *tokptr; |
| 1283 | if (isupper (temp)) |
| 1284 | temp = tolower (temp); |
| 1285 | tokptr++; |
| 1286 | switch (temp) |
| 1287 | { |
| 1288 | case '_': |
| 1289 | continue; |
| 1290 | case '0': case '1': case '2': case '3': case '4': |
| 1291 | case '5': case '6': case '7': case '8': case '9': |
| 1292 | temp -= '0'; |
| 1293 | break; |
| 1294 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 1295 | temp -= 'a'; |
| 1296 | temp += 10; |
| 1297 | break; |
| 1298 | default: |
| 1299 | temp = base; |
| 1300 | break; |
| 1301 | } |
| 1302 | if (temp < base) |
| 1303 | { |
| 1304 | digits++; |
| 1305 | *ivalptr *= base; |
| 1306 | *ivalptr += temp; |
| 1307 | } |
| 1308 | else |
| 1309 | { |
| 1310 | /* Found something not in domain for current base. */ |
| 1311 | tokptr--; /* Unconsume what gave us indigestion. */ |
| 1312 | break; |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | /* If we didn't find any digits, then we don't have a valid integer |
| 1317 | value, so reject the entire token. Otherwise, update the lexical |
| 1318 | scan pointer, and return non-zero for success. */ |
| 1319 | |
| 1320 | if (digits == 0) |
| 1321 | { |
| 1322 | return (0); |
| 1323 | } |
| 1324 | else |
| 1325 | { |
| 1326 | *tokptrptr = tokptr; |
| 1327 | return (1); |
| 1328 | } |
| 1329 | } |
| 1330 | |
| 1331 | static int |
| 1332 | decode_integer_literal (valptr, tokptrptr) |
| 1333 | LONGEST *valptr; |
| 1334 | char **tokptrptr; |
| 1335 | { |
| 1336 | char *tokptr = *tokptrptr; |
| 1337 | int base = 0; |
| 1338 | LONGEST ival = 0; |
| 1339 | int explicit_base = 0; |
| 1340 | |
| 1341 | /* Look for an explicit base specifier, which is optional. */ |
| 1342 | |
| 1343 | switch (*tokptr) |
| 1344 | { |
| 1345 | case 'd': |
| 1346 | case 'D': |
| 1347 | explicit_base++; |
| 1348 | base = 10; |
| 1349 | tokptr++; |
| 1350 | break; |
| 1351 | case 'b': |
| 1352 | case 'B': |
| 1353 | explicit_base++; |
| 1354 | base = 2; |
| 1355 | tokptr++; |
| 1356 | break; |
| 1357 | case 'h': |
| 1358 | case 'H': |
| 1359 | explicit_base++; |
| 1360 | base = 16; |
| 1361 | tokptr++; |
| 1362 | break; |
| 1363 | case 'o': |
| 1364 | case 'O': |
| 1365 | explicit_base++; |
| 1366 | base = 8; |
| 1367 | tokptr++; |
| 1368 | break; |
| 1369 | default: |
| 1370 | base = 10; |
| 1371 | break; |
| 1372 | } |
| 1373 | |
| 1374 | /* If we found an explicit base ensure that the character after the |
| 1375 | explicit base is a single quote. */ |
| 1376 | |
| 1377 | if (explicit_base && (*tokptr++ != '\'')) |
| 1378 | { |
| 1379 | return (0); |
| 1380 | } |
| 1381 | |
| 1382 | /* Attempt to decode whatever follows as an integer value in the |
| 1383 | indicated base, updating the token pointer in the process and |
| 1384 | computing the value into ival. Also, if we have an explicit |
| 1385 | base, then the next character must not be a single quote, or we |
| 1386 | have a bitstring literal, so reject the entire token in this case. |
| 1387 | Otherwise, update the lexical scan pointer, and return non-zero |
| 1388 | for success. */ |
| 1389 | |
| 1390 | if (!decode_integer_value (base, &tokptr, &ival)) |
| 1391 | { |
| 1392 | return (0); |
| 1393 | } |
| 1394 | else if (explicit_base && (*tokptr == '\'')) |
| 1395 | { |
| 1396 | return (0); |
| 1397 | } |
| 1398 | else |
| 1399 | { |
| 1400 | *valptr = ival; |
| 1401 | *tokptrptr = tokptr; |
| 1402 | return (1); |
| 1403 | } |
| 1404 | } |
| 1405 | |
| 1406 | /* If it wasn't for the fact that floating point values can contain '_' |
| 1407 | characters, we could just let strtod do all the hard work by letting it |
| 1408 | try to consume as much of the current token buffer as possible and |
| 1409 | find a legal conversion. Unfortunately we need to filter out the '_' |
| 1410 | characters before calling strtod, which we do by copying the other |
| 1411 | legal chars to a local buffer to be converted. However since we also |
| 1412 | need to keep track of where the last unconsumed character in the input |
| 1413 | buffer is, we have transfer only as many characters as may compose a |
| 1414 | legal floating point value. */ |
| 1415 | |
| 1416 | static enum ch_terminal |
| 1417 | match_float_literal () |
| 1418 | { |
| 1419 | char *tokptr = lexptr; |
| 1420 | char *buf; |
| 1421 | char *copy; |
| 1422 | double dval; |
| 1423 | extern double strtod (); |
| 1424 | |
| 1425 | /* Make local buffer in which to build the string to convert. This is |
| 1426 | required because underscores are valid in chill floating point numbers |
| 1427 | but not in the string passed to strtod to convert. The string will be |
| 1428 | no longer than our input string. */ |
| 1429 | |
| 1430 | copy = buf = (char *) alloca (strlen (tokptr) + 1); |
| 1431 | |
| 1432 | /* Transfer all leading digits to the conversion buffer, discarding any |
| 1433 | underscores. */ |
| 1434 | |
| 1435 | while (isdigit (*tokptr) || *tokptr == '_') |
| 1436 | { |
| 1437 | if (*tokptr != '_') |
| 1438 | { |
| 1439 | *copy++ = *tokptr; |
| 1440 | } |
| 1441 | tokptr++; |
| 1442 | } |
| 1443 | |
| 1444 | /* Now accept either a '.', or one of [eEdD]. Dot is legal regardless |
| 1445 | of whether we found any leading digits, and we simply accept it and |
| 1446 | continue on to look for the fractional part and/or exponent. One of |
| 1447 | [eEdD] is legal only if we have seen digits, and means that there |
| 1448 | is no fractional part. If we find neither of these, then this is |
| 1449 | not a floating point number, so return failure. */ |
| 1450 | |
| 1451 | switch (*tokptr++) |
| 1452 | { |
| 1453 | case '.': |
| 1454 | /* Accept and then look for fractional part and/or exponent. */ |
| 1455 | *copy++ = '.'; |
| 1456 | break; |
| 1457 | |
| 1458 | case 'e': |
| 1459 | case 'E': |
| 1460 | case 'd': |
| 1461 | case 'D': |
| 1462 | if (copy == buf) |
| 1463 | { |
| 1464 | return (0); |
| 1465 | } |
| 1466 | *copy++ = 'e'; |
| 1467 | goto collect_exponent; |
| 1468 | break; |
| 1469 | |
| 1470 | default: |
| 1471 | return (0); |
| 1472 | break; |
| 1473 | } |
| 1474 | |
| 1475 | /* We found a '.', copy any fractional digits to the conversion buffer, up |
| 1476 | to the first nondigit, non-underscore character. */ |
| 1477 | |
| 1478 | while (isdigit (*tokptr) || *tokptr == '_') |
| 1479 | { |
| 1480 | if (*tokptr != '_') |
| 1481 | { |
| 1482 | *copy++ = *tokptr; |
| 1483 | } |
| 1484 | tokptr++; |
| 1485 | } |
| 1486 | |
| 1487 | /* Look for an exponent, which must start with one of [eEdD]. If none |
| 1488 | is found, jump directly to trying to convert what we have collected |
| 1489 | so far. */ |
| 1490 | |
| 1491 | switch (*tokptr) |
| 1492 | { |
| 1493 | case 'e': |
| 1494 | case 'E': |
| 1495 | case 'd': |
| 1496 | case 'D': |
| 1497 | *copy++ = 'e'; |
| 1498 | tokptr++; |
| 1499 | break; |
| 1500 | default: |
| 1501 | goto convert_float; |
| 1502 | break; |
| 1503 | } |
| 1504 | |
| 1505 | /* Accept an optional '-' or '+' following one of [eEdD]. */ |
| 1506 | |
| 1507 | collect_exponent: |
| 1508 | if (*tokptr == '+' || *tokptr == '-') |
| 1509 | { |
| 1510 | *copy++ = *tokptr++; |
| 1511 | } |
| 1512 | |
| 1513 | /* Now copy an exponent into the conversion buffer. Note that at the |
| 1514 | moment underscores are *not* allowed in exponents. */ |
| 1515 | |
| 1516 | while (isdigit (*tokptr)) |
| 1517 | { |
| 1518 | *copy++ = *tokptr++; |
| 1519 | } |
| 1520 | |
| 1521 | /* If we transfered any chars to the conversion buffer, try to interpret its |
| 1522 | contents as a floating point value. If any characters remain, then we |
| 1523 | must not have a valid floating point string. */ |
| 1524 | |
| 1525 | convert_float: |
| 1526 | *copy = '\0'; |
| 1527 | if (copy != buf) |
| 1528 | { |
| 1529 | dval = strtod (buf, ©); |
| 1530 | if (*copy == '\0') |
| 1531 | { |
| 1532 | yylval.dval = dval; |
| 1533 | lexptr = tokptr; |
| 1534 | return (FLOAT_LITERAL); |
| 1535 | } |
| 1536 | } |
| 1537 | return (0); |
| 1538 | } |
| 1539 | |
| 1540 | /* Recognize a string literal. A string literal is a sequence |
| 1541 | of characters enclosed in matching single or double quotes, except that |
| 1542 | a single character inside single quotes is a character literal, which |
| 1543 | we reject as a string literal. To embed the terminator character inside |
| 1544 | a string, it is simply doubled (I.E. "this""is""one""string") */ |
| 1545 | |
| 1546 | static enum ch_terminal |
| 1547 | match_string_literal () |
| 1548 | { |
| 1549 | char *tokptr = lexptr; |
| 1550 | int in_ctrlseq = 0; |
| 1551 | LONGEST ival; |
| 1552 | |
| 1553 | for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++) |
| 1554 | { |
| 1555 | CHECKBUF (1); |
| 1556 | tryagain: ; |
| 1557 | if (in_ctrlseq) |
| 1558 | { |
| 1559 | /* skip possible whitespaces */ |
| 1560 | while ((*tokptr == ' ' || *tokptr == '\t') && *tokptr) |
| 1561 | tokptr++; |
| 1562 | if (*tokptr == ')') |
| 1563 | { |
| 1564 | in_ctrlseq = 0; |
| 1565 | tokptr++; |
| 1566 | goto tryagain; |
| 1567 | } |
| 1568 | else if (*tokptr != ',') |
| 1569 | error ("Invalid control sequence"); |
| 1570 | tokptr++; |
| 1571 | /* skip possible whitespaces */ |
| 1572 | while ((*tokptr == ' ' || *tokptr == '\t') && *tokptr) |
| 1573 | tokptr++; |
| 1574 | if (!decode_integer_literal (&ival, &tokptr)) |
| 1575 | error ("Invalid control sequence"); |
| 1576 | tokptr--; |
| 1577 | } |
| 1578 | else if (*tokptr == *lexptr) |
| 1579 | { |
| 1580 | if (*(tokptr + 1) == *lexptr) |
| 1581 | { |
| 1582 | ival = *tokptr++; |
| 1583 | } |
| 1584 | else |
| 1585 | { |
| 1586 | break; |
| 1587 | } |
| 1588 | } |
| 1589 | else if (*tokptr == '^') |
| 1590 | { |
| 1591 | if (*(tokptr + 1) == '(') |
| 1592 | { |
| 1593 | in_ctrlseq = 1; |
| 1594 | tokptr += 2; |
| 1595 | if (!decode_integer_literal (&ival, &tokptr)) |
| 1596 | error ("Invalid control sequence"); |
| 1597 | tokptr--; |
| 1598 | } |
| 1599 | else if (*(tokptr + 1) == '^') |
| 1600 | ival = *tokptr++; |
| 1601 | else |
| 1602 | error ("Invalid control sequence"); |
| 1603 | } |
| 1604 | else |
| 1605 | ival = *tokptr; |
| 1606 | tempbuf[tempbufindex++] = ival; |
| 1607 | } |
| 1608 | if (in_ctrlseq) |
| 1609 | error ("Invalid control sequence"); |
| 1610 | |
| 1611 | if (*tokptr == '\0' /* no terminator */ |
| 1612 | || (tempbufindex == 1 && *tokptr == '\'')) /* char literal */ |
| 1613 | { |
| 1614 | return (0); |
| 1615 | } |
| 1616 | else |
| 1617 | { |
| 1618 | tempbuf[tempbufindex] = '\0'; |
| 1619 | yylval.sval.ptr = tempbuf; |
| 1620 | yylval.sval.length = tempbufindex; |
| 1621 | lexptr = ++tokptr; |
| 1622 | return (CHARACTER_STRING_LITERAL); |
| 1623 | } |
| 1624 | } |
| 1625 | |
| 1626 | /* Recognize a character literal. A character literal is single character |
| 1627 | or a control sequence, enclosed in single quotes. A control sequence |
| 1628 | is a comma separated list of one or more integer literals, enclosed |
| 1629 | in parenthesis and introduced with a circumflex character. |
| 1630 | |
| 1631 | EX: 'a' '^(7)' '^(7,8)' |
| 1632 | |
| 1633 | As a GNU chill extension, the syntax C'xx' is also recognized as a |
| 1634 | character literal, where xx is a hex value for the character. |
| 1635 | |
| 1636 | Note that more than a single character, enclosed in single quotes, is |
| 1637 | a string literal. |
| 1638 | |
| 1639 | Returns CHARACTER_LITERAL if a match is found. |
| 1640 | */ |
| 1641 | |
| 1642 | static enum ch_terminal |
| 1643 | match_character_literal () |
| 1644 | { |
| 1645 | char *tokptr = lexptr; |
| 1646 | LONGEST ival = 0; |
| 1647 | |
| 1648 | if ((*tokptr == 'c' || *tokptr == 'C') && (*(tokptr + 1) == '\'')) |
| 1649 | { |
| 1650 | /* We have a GNU chill extension form, so skip the leading "C'", |
| 1651 | decode the hex value, and then ensure that we have a trailing |
| 1652 | single quote character. */ |
| 1653 | tokptr += 2; |
| 1654 | if (!decode_integer_value (16, &tokptr, &ival) || (*tokptr != '\'')) |
| 1655 | { |
| 1656 | return (0); |
| 1657 | } |
| 1658 | tokptr++; |
| 1659 | } |
| 1660 | else if (*tokptr == '\'') |
| 1661 | { |
| 1662 | tokptr++; |
| 1663 | |
| 1664 | /* Determine which form we have, either a control sequence or the |
| 1665 | single character form. */ |
| 1666 | |
| 1667 | if (*tokptr == '^') |
| 1668 | { |
| 1669 | if (*(tokptr + 1) == '(') |
| 1670 | { |
| 1671 | /* Match and decode a control sequence. Return zero if we don't |
| 1672 | find a valid integer literal, or if the next unconsumed character |
| 1673 | after the integer literal is not the trailing ')'. */ |
| 1674 | tokptr += 2; |
| 1675 | if (!decode_integer_literal (&ival, &tokptr) || (*tokptr++ != ')')) |
| 1676 | { |
| 1677 | return (0); |
| 1678 | } |
| 1679 | } |
| 1680 | else if (*(tokptr + 1) == '^') |
| 1681 | { |
| 1682 | ival = *tokptr; |
| 1683 | tokptr += 2; |
| 1684 | } |
| 1685 | else |
| 1686 | /* fail */ |
| 1687 | error ("Invalid control sequence"); |
| 1688 | } |
| 1689 | else if (*tokptr == '\'') |
| 1690 | { |
| 1691 | /* this must be duplicated */ |
| 1692 | ival = *tokptr; |
| 1693 | tokptr += 2; |
| 1694 | } |
| 1695 | else |
| 1696 | { |
| 1697 | ival = *tokptr++; |
| 1698 | } |
| 1699 | |
| 1700 | /* The trailing quote has not yet been consumed. If we don't find |
| 1701 | it, then we have no match. */ |
| 1702 | |
| 1703 | if (*tokptr++ != '\'') |
| 1704 | { |
| 1705 | return (0); |
| 1706 | } |
| 1707 | } |
| 1708 | else |
| 1709 | { |
| 1710 | /* Not a character literal. */ |
| 1711 | return (0); |
| 1712 | } |
| 1713 | yylval.typed_val.val = ival; |
| 1714 | yylval.typed_val.type = builtin_type_chill_char; |
| 1715 | lexptr = tokptr; |
| 1716 | return (CHARACTER_LITERAL); |
| 1717 | } |
| 1718 | |
| 1719 | /* Recognize an integer literal, as specified in Z.200 sec 5.2.4.2. |
| 1720 | Note that according to 5.2.4.2, a single "_" is also a valid integer |
| 1721 | literal, however GNU-chill requires there to be at least one "digit" |
| 1722 | in any integer literal. */ |
| 1723 | |
| 1724 | static enum ch_terminal |
| 1725 | match_integer_literal () |
| 1726 | { |
| 1727 | char *tokptr = lexptr; |
| 1728 | LONGEST ival; |
| 1729 | |
| 1730 | if (!decode_integer_literal (&ival, &tokptr)) |
| 1731 | { |
| 1732 | return (0); |
| 1733 | } |
| 1734 | else |
| 1735 | { |
| 1736 | yylval.typed_val.val = ival; |
| 1737 | #if defined(CC_HAS_LONG_LONG) && defined(__STDC__) |
| 1738 | if (ival > (LONGEST)2147483647U || ival < -(LONGEST)2147483648U) |
| 1739 | yylval.typed_val.type = builtin_type_long_long; |
| 1740 | else |
| 1741 | #endif |
| 1742 | yylval.typed_val.type = builtin_type_int; |
| 1743 | lexptr = tokptr; |
| 1744 | return (INTEGER_LITERAL); |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | /* Recognize a bit-string literal, as specified in Z.200 sec 5.2.4.8 |
| 1749 | Note that according to 5.2.4.8, a single "_" is also a valid bit-string |
| 1750 | literal, however GNU-chill requires there to be at least one "digit" |
| 1751 | in any bit-string literal. */ |
| 1752 | |
| 1753 | static enum ch_terminal |
| 1754 | match_bitstring_literal () |
| 1755 | { |
| 1756 | register char *tokptr = lexptr; |
| 1757 | int bitoffset = 0; |
| 1758 | int bitcount = 0; |
| 1759 | int bits_per_char; |
| 1760 | int digit; |
| 1761 | |
| 1762 | tempbufindex = 0; |
| 1763 | CHECKBUF (1); |
| 1764 | tempbuf[0] = 0; |
| 1765 | |
| 1766 | /* Look for the required explicit base specifier. */ |
| 1767 | |
| 1768 | switch (*tokptr++) |
| 1769 | { |
| 1770 | case 'b': |
| 1771 | case 'B': |
| 1772 | bits_per_char = 1; |
| 1773 | break; |
| 1774 | case 'o': |
| 1775 | case 'O': |
| 1776 | bits_per_char = 3; |
| 1777 | break; |
| 1778 | case 'h': |
| 1779 | case 'H': |
| 1780 | bits_per_char = 4; |
| 1781 | break; |
| 1782 | default: |
| 1783 | return (0); |
| 1784 | break; |
| 1785 | } |
| 1786 | |
| 1787 | /* Ensure that the character after the explicit base is a single quote. */ |
| 1788 | |
| 1789 | if (*tokptr++ != '\'') |
| 1790 | { |
| 1791 | return (0); |
| 1792 | } |
| 1793 | |
| 1794 | while (*tokptr != '\0' && *tokptr != '\'') |
| 1795 | { |
| 1796 | digit = *tokptr; |
| 1797 | if (isupper (digit)) |
| 1798 | digit = tolower (digit); |
| 1799 | tokptr++; |
| 1800 | switch (digit) |
| 1801 | { |
| 1802 | case '_': |
| 1803 | continue; |
| 1804 | case '0': case '1': case '2': case '3': case '4': |
| 1805 | case '5': case '6': case '7': case '8': case '9': |
| 1806 | digit -= '0'; |
| 1807 | break; |
| 1808 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 1809 | digit -= 'a'; |
| 1810 | digit += 10; |
| 1811 | break; |
| 1812 | default: |
| 1813 | /* this is not a bitstring literal, probably an integer */ |
| 1814 | return 0; |
| 1815 | } |
| 1816 | if (digit >= 1 << bits_per_char) |
| 1817 | { |
| 1818 | /* Found something not in domain for current base. */ |
| 1819 | error ("Too-large digit in bitstring or integer."); |
| 1820 | } |
| 1821 | else |
| 1822 | { |
| 1823 | /* Extract bits from digit, packing them into the bitstring byte. */ |
| 1824 | int k = TARGET_BYTE_ORDER == BIG_ENDIAN ? bits_per_char - 1 : 0; |
| 1825 | for (; TARGET_BYTE_ORDER == BIG_ENDIAN ? k >= 0 : k < bits_per_char; |
| 1826 | TARGET_BYTE_ORDER == BIG_ENDIAN ? k-- : k++) |
| 1827 | { |
| 1828 | bitcount++; |
| 1829 | if (digit & (1 << k)) |
| 1830 | { |
| 1831 | tempbuf[tempbufindex] |= |
| 1832 | (TARGET_BYTE_ORDER == BIG_ENDIAN) |
| 1833 | ? (1 << (HOST_CHAR_BIT - 1 - bitoffset)) |
| 1834 | : (1 << bitoffset); |
| 1835 | } |
| 1836 | bitoffset++; |
| 1837 | if (bitoffset == HOST_CHAR_BIT) |
| 1838 | { |
| 1839 | bitoffset = 0; |
| 1840 | tempbufindex++; |
| 1841 | CHECKBUF(1); |
| 1842 | tempbuf[tempbufindex] = 0; |
| 1843 | } |
| 1844 | } |
| 1845 | } |
| 1846 | } |
| 1847 | |
| 1848 | /* Verify that we consumed everything up to the trailing single quote, |
| 1849 | and that we found some bits (IE not just underbars). */ |
| 1850 | |
| 1851 | if (*tokptr++ != '\'') |
| 1852 | { |
| 1853 | return (0); |
| 1854 | } |
| 1855 | else |
| 1856 | { |
| 1857 | yylval.sval.ptr = tempbuf; |
| 1858 | yylval.sval.length = bitcount; |
| 1859 | lexptr = tokptr; |
| 1860 | return (BIT_STRING_LITERAL); |
| 1861 | } |
| 1862 | } |
| 1863 | |
| 1864 | struct token |
| 1865 | { |
| 1866 | char *operator; |
| 1867 | int token; |
| 1868 | }; |
| 1869 | |
| 1870 | static const struct token idtokentab[] = |
| 1871 | { |
| 1872 | { "array", ARRAY }, |
| 1873 | { "length", LENGTH }, |
| 1874 | { "lower", LOWER }, |
| 1875 | { "upper", UPPER }, |
| 1876 | { "andif", ANDIF }, |
| 1877 | { "pred", PRED }, |
| 1878 | { "succ", SUCC }, |
| 1879 | { "card", CARD }, |
| 1880 | { "size", SIZE }, |
| 1881 | { "orif", ORIF }, |
| 1882 | { "num", NUM }, |
| 1883 | { "abs", ABS }, |
| 1884 | { "max", MAX_TOKEN }, |
| 1885 | { "min", MIN_TOKEN }, |
| 1886 | { "mod", MOD }, |
| 1887 | { "rem", REM }, |
| 1888 | { "not", NOT }, |
| 1889 | { "xor", LOGXOR }, |
| 1890 | { "and", LOGAND }, |
| 1891 | { "in", IN }, |
| 1892 | { "or", LOGIOR }, |
| 1893 | { "up", UP }, |
| 1894 | { "addr", ADDR_TOKEN }, |
| 1895 | { "null", EMPTINESS_LITERAL } |
| 1896 | }; |
| 1897 | |
| 1898 | static const struct token tokentab2[] = |
| 1899 | { |
| 1900 | { ":=", GDB_ASSIGNMENT }, |
| 1901 | { "//", SLASH_SLASH }, |
| 1902 | { "->", POINTER }, |
| 1903 | { "/=", NOTEQUAL }, |
| 1904 | { "<=", LEQ }, |
| 1905 | { ">=", GEQ } |
| 1906 | }; |
| 1907 | |
| 1908 | /* Read one token, getting characters through lexptr. */ |
| 1909 | /* This is where we will check to make sure that the language and the |
| 1910 | operators used are compatible. */ |
| 1911 | |
| 1912 | static enum ch_terminal |
| 1913 | ch_lex () |
| 1914 | { |
| 1915 | unsigned int i; |
| 1916 | enum ch_terminal token; |
| 1917 | char *inputname; |
| 1918 | struct symbol *sym; |
| 1919 | |
| 1920 | /* Skip over any leading whitespace. */ |
| 1921 | while (isspace (*lexptr)) |
| 1922 | { |
| 1923 | lexptr++; |
| 1924 | } |
| 1925 | /* Look for special single character cases which can't be the first |
| 1926 | character of some other multicharacter token. */ |
| 1927 | switch (*lexptr) |
| 1928 | { |
| 1929 | case '\0': |
| 1930 | return END_TOKEN; |
| 1931 | case ',': |
| 1932 | case '=': |
| 1933 | case ';': |
| 1934 | case '!': |
| 1935 | case '+': |
| 1936 | case '*': |
| 1937 | case '(': |
| 1938 | case ')': |
| 1939 | case '[': |
| 1940 | case ']': |
| 1941 | return (*lexptr++); |
| 1942 | } |
| 1943 | /* Look for characters which start a particular kind of multicharacter |
| 1944 | token, such as a character literal, register name, convenience |
| 1945 | variable name, string literal, etc. */ |
| 1946 | switch (*lexptr) |
| 1947 | { |
| 1948 | case '\'': |
| 1949 | case '\"': |
| 1950 | /* First try to match a string literal, which is any |
| 1951 | sequence of characters enclosed in matching single or double |
| 1952 | quotes, except that a single character inside single quotes |
| 1953 | is a character literal, so we have to catch that case also. */ |
| 1954 | token = match_string_literal (); |
| 1955 | if (token != 0) |
| 1956 | { |
| 1957 | return (token); |
| 1958 | } |
| 1959 | if (*lexptr == '\'') |
| 1960 | { |
| 1961 | token = match_character_literal (); |
| 1962 | if (token != 0) |
| 1963 | { |
| 1964 | return (token); |
| 1965 | } |
| 1966 | } |
| 1967 | break; |
| 1968 | case 'C': |
| 1969 | case 'c': |
| 1970 | token = match_character_literal (); |
| 1971 | if (token != 0) |
| 1972 | { |
| 1973 | return (token); |
| 1974 | } |
| 1975 | break; |
| 1976 | case '$': |
| 1977 | yylval.sval.ptr = lexptr; |
| 1978 | do { |
| 1979 | lexptr++; |
| 1980 | } while (isalnum (*lexptr) || *lexptr == '_' || *lexptr == '$'); |
| 1981 | yylval.sval.length = lexptr - yylval.sval.ptr; |
| 1982 | write_dollar_variable (yylval.sval); |
| 1983 | return GDB_VARIABLE; |
| 1984 | break; |
| 1985 | } |
| 1986 | /* See if it is a special token of length 2. */ |
| 1987 | for (i = 0; i < sizeof (tokentab2) / sizeof (tokentab2[0]); i++) |
| 1988 | { |
| 1989 | if (STREQN (lexptr, tokentab2[i].operator, 2)) |
| 1990 | { |
| 1991 | lexptr += 2; |
| 1992 | return (tokentab2[i].token); |
| 1993 | } |
| 1994 | } |
| 1995 | /* Look for single character cases which which could be the first |
| 1996 | character of some other multicharacter token, but aren't, or we |
| 1997 | would already have found it. */ |
| 1998 | switch (*lexptr) |
| 1999 | { |
| 2000 | case '-': |
| 2001 | case ':': |
| 2002 | case '/': |
| 2003 | case '<': |
| 2004 | case '>': |
| 2005 | return (*lexptr++); |
| 2006 | } |
| 2007 | /* Look for a float literal before looking for an integer literal, so |
| 2008 | we match as much of the input stream as possible. */ |
| 2009 | token = match_float_literal (); |
| 2010 | if (token != 0) |
| 2011 | { |
| 2012 | return (token); |
| 2013 | } |
| 2014 | token = match_bitstring_literal (); |
| 2015 | if (token != 0) |
| 2016 | { |
| 2017 | return (token); |
| 2018 | } |
| 2019 | token = match_integer_literal (); |
| 2020 | if (token != 0) |
| 2021 | { |
| 2022 | return (token); |
| 2023 | } |
| 2024 | |
| 2025 | /* Try to match a simple name string, and if a match is found, then |
| 2026 | further classify what sort of name it is and return an appropriate |
| 2027 | token. Note that attempting to match a simple name string consumes |
| 2028 | the token from lexptr, so we can't back out if we later find that |
| 2029 | we can't classify what sort of name it is. */ |
| 2030 | |
| 2031 | inputname = match_simple_name_string (); |
| 2032 | |
| 2033 | if (inputname != NULL) |
| 2034 | { |
| 2035 | char *simplename = (char*) alloca (strlen (inputname) + 1); |
| 2036 | |
| 2037 | char *dptr = simplename, *sptr = inputname; |
| 2038 | for (; *sptr; sptr++) |
| 2039 | *dptr++ = isupper (*sptr) ? tolower(*sptr) : *sptr; |
| 2040 | *dptr = '\0'; |
| 2041 | |
| 2042 | /* See if it is a reserved identifier. */ |
| 2043 | for (i = 0; i < sizeof (idtokentab) / sizeof (idtokentab[0]); i++) |
| 2044 | { |
| 2045 | if (STREQ (simplename, idtokentab[i].operator)) |
| 2046 | { |
| 2047 | return (idtokentab[i].token); |
| 2048 | } |
| 2049 | } |
| 2050 | |
| 2051 | /* Look for other special tokens. */ |
| 2052 | if (STREQ (simplename, "true")) |
| 2053 | { |
| 2054 | yylval.ulval = 1; |
| 2055 | return (BOOLEAN_LITERAL); |
| 2056 | } |
| 2057 | if (STREQ (simplename, "false")) |
| 2058 | { |
| 2059 | yylval.ulval = 0; |
| 2060 | return (BOOLEAN_LITERAL); |
| 2061 | } |
| 2062 | |
| 2063 | sym = lookup_symbol (inputname, expression_context_block, |
| 2064 | VAR_NAMESPACE, (int *) NULL, |
| 2065 | (struct symtab **) NULL); |
| 2066 | if (sym == NULL && strcmp (inputname, simplename) != 0) |
| 2067 | { |
| 2068 | sym = lookup_symbol (simplename, expression_context_block, |
| 2069 | VAR_NAMESPACE, (int *) NULL, |
| 2070 | (struct symtab **) NULL); |
| 2071 | } |
| 2072 | if (sym != NULL) |
| 2073 | { |
| 2074 | yylval.ssym.stoken.ptr = NULL; |
| 2075 | yylval.ssym.stoken.length = 0; |
| 2076 | yylval.ssym.sym = sym; |
| 2077 | yylval.ssym.is_a_field_of_this = 0; /* FIXME, C++'ism */ |
| 2078 | switch (SYMBOL_CLASS (sym)) |
| 2079 | { |
| 2080 | case LOC_BLOCK: |
| 2081 | /* Found a procedure name. */ |
| 2082 | return (GENERAL_PROCEDURE_NAME); |
| 2083 | case LOC_STATIC: |
| 2084 | /* Found a global or local static variable. */ |
| 2085 | return (LOCATION_NAME); |
| 2086 | case LOC_REGISTER: |
| 2087 | case LOC_ARG: |
| 2088 | case LOC_REF_ARG: |
| 2089 | case LOC_REGPARM: |
| 2090 | case LOC_REGPARM_ADDR: |
| 2091 | case LOC_LOCAL: |
| 2092 | case LOC_LOCAL_ARG: |
| 2093 | case LOC_BASEREG: |
| 2094 | case LOC_BASEREG_ARG: |
| 2095 | if (innermost_block == NULL |
| 2096 | || contained_in (block_found, innermost_block)) |
| 2097 | { |
| 2098 | innermost_block = block_found; |
| 2099 | } |
| 2100 | return (LOCATION_NAME); |
| 2101 | break; |
| 2102 | case LOC_CONST: |
| 2103 | case LOC_LABEL: |
| 2104 | return (LOCATION_NAME); |
| 2105 | break; |
| 2106 | case LOC_TYPEDEF: |
| 2107 | yylval.tsym.type = SYMBOL_TYPE (sym); |
| 2108 | return TYPENAME; |
| 2109 | case LOC_UNDEF: |
| 2110 | case LOC_CONST_BYTES: |
| 2111 | case LOC_OPTIMIZED_OUT: |
| 2112 | error ("Symbol \"%s\" names no location.", inputname); |
| 2113 | break; |
| 2114 | case LOC_UNRESOLVED: |
| 2115 | error ("unhandled SYMBOL_CLASS in ch_lex()"); |
| 2116 | break; |
| 2117 | } |
| 2118 | } |
| 2119 | else if (!have_full_symbols () && !have_partial_symbols ()) |
| 2120 | { |
| 2121 | error ("No symbol table is loaded. Use the \"file\" command."); |
| 2122 | } |
| 2123 | else |
| 2124 | { |
| 2125 | error ("No symbol \"%s\" in current context.", inputname); |
| 2126 | } |
| 2127 | } |
| 2128 | |
| 2129 | /* Catch single character tokens which are not part of some |
| 2130 | longer token. */ |
| 2131 | |
| 2132 | switch (*lexptr) |
| 2133 | { |
| 2134 | case '.': /* Not float for example. */ |
| 2135 | lexptr++; |
| 2136 | while (isspace (*lexptr)) lexptr++; |
| 2137 | inputname = match_simple_name_string (); |
| 2138 | if (!inputname) |
| 2139 | return '.'; |
| 2140 | return DOT_FIELD_NAME; |
| 2141 | } |
| 2142 | |
| 2143 | return (ILLEGAL_TOKEN); |
| 2144 | } |
| 2145 | |
| 2146 | static void |
| 2147 | write_lower_upper_value (opcode, type) |
| 2148 | enum exp_opcode opcode; /* Either UNOP_LOWER or UNOP_UPPER */ |
| 2149 | struct type *type; |
| 2150 | { |
| 2151 | if (type == NULL) |
| 2152 | write_exp_elt_opcode (opcode); |
| 2153 | else |
| 2154 | { |
| 2155 | struct type *result_type; |
| 2156 | LONGEST val = type_lower_upper (opcode, type, &result_type); |
| 2157 | write_exp_elt_opcode (OP_LONG); |
| 2158 | write_exp_elt_type (result_type); |
| 2159 | write_exp_elt_longcst (val); |
| 2160 | write_exp_elt_opcode (OP_LONG); |
| 2161 | } |
| 2162 | } |
| 2163 | |
| 2164 | void |
| 2165 | chill_error (msg) |
| 2166 | char *msg; |
| 2167 | { |
| 2168 | /* Never used. */ |
| 2169 | } |