scan.l revision 1.37
1 %{ 2 /* $NetBSD: scan.l,v 1.37 2007/02/06 00:08:31 he Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved. 6 * Copyright (c) 1994, 1995 Jochen Pohl 7 * All Rights Reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Jochen Pohl for 20 * The NetBSD Project. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(__RCSID) && !defined(lint) 38 __RCSID("$NetBSD: scan.l,v 1.37 2007/02/06 00:08:31 he Exp $"); 39 #endif 40 41 #include <stdlib.h> 42 #include <string.h> 43 #include <limits.h> 44 #include <float.h> 45 #include <ctype.h> 46 #include <errno.h> 47 #include <math.h> 48 49 #include "lint1.h" 50 #include "cgram.h" 51 52 #define CHAR_MASK (~(~0 << CHAR_BIT)) 53 #define YY_NO_UNPUT 54 55 /* Current position (its also updated when an included file is parsed) */ 56 pos_t curr_pos = { 1, "", 0 }; 57 58 /* 59 * Current position in C source (not updated when an included file is 60 * parsed). 61 */ 62 pos_t csrc_pos = { 1, "", 0 }; 63 64 static void incline(void); 65 static void badchar(int); 66 static sbuf_t *allocsb(void); 67 static void freesb(sbuf_t *); 68 static int inpc(void); 69 static int hash(const char *); 70 static sym_t *search(sbuf_t *); 71 static int name(void); 72 static int keyw(sym_t *); 73 static int icon(int); 74 static int fcon(void); 75 static int operator(int, op_t); 76 static int ccon(void); 77 static int wccon(void); 78 static int getescc(int); 79 static void directive(void); 80 static void comment(void); 81 static void slashslashcomment(void); 82 static int string(void); 83 static int wcstrg(void); 84 85 %} 86 87 L [_A-Za-z] 88 D [0-9] 89 NZD [1-9] 90 OD [0-7] 91 HD [0-9A-Fa-f] 92 EX ([eE][+-]?[0-9]+) 93 94 %% 95 96 {L}({L}|{D})* return (name()); 97 0{OD}*[lLuU]* return (icon(8)); 98 {NZD}{D}*[lLuU]* return (icon(10)); 99 0[xX]{HD}+[lLuU]* return (icon(16)); 100 {D}+\.{D}*{EX}?[fFlL]? | 101 {D}+{EX}[fFlL]? | 102 0[xX]{HD}+p{HD}+[fFlL]? | 103 \.{D}+{EX}?[fFlL]? return (fcon()); 104 "=" return (operator(T_ASSIGN, ASSIGN)); 105 "*=" return (operator(T_OPASS, MULASS)); 106 "/=" return (operator(T_OPASS, DIVASS)); 107 "%=" return (operator(T_OPASS, MODASS)); 108 "+=" return (operator(T_OPASS, ADDASS)); 109 "-=" return (operator(T_OPASS, SUBASS)); 110 "<<=" return (operator(T_OPASS, SHLASS)); 111 ">>=" return (operator(T_OPASS, SHRASS)); 112 "&=" return (operator(T_OPASS, ANDASS)); 113 "^=" return (operator(T_OPASS, XORASS)); 114 "|=" return (operator(T_OPASS, ORASS)); 115 "||" return (operator(T_LOGOR, LOGOR)); 116 "&&" return (operator(T_LOGAND, LOGAND)); 117 "|" return (operator(T_OR, OR)); 118 "&" return (operator(T_AND, AND)); 119 "^" return (operator(T_XOR, XOR)); 120 "==" return (operator(T_EQOP, EQ)); 121 "!=" return (operator(T_EQOP, NE)); 122 "<" return (operator(T_RELOP, LT)); 123 ">" return (operator(T_RELOP, GT)); 124 "<=" return (operator(T_RELOP, LE)); 125 ">=" return (operator(T_RELOP, GE)); 126 "<<" return (operator(T_SHFTOP, SHL)); 127 ">>" return (operator(T_SHFTOP, SHR)); 128 "++" return (operator(T_INCDEC, INC)); 129 "--" return (operator(T_INCDEC, DEC)); 130 "->" return (operator(T_STROP, ARROW)); 131 "." return (operator(T_STROP, POINT)); 132 "+" return (operator(T_ADDOP, PLUS)); 133 "-" return (operator(T_ADDOP, MINUS)); 134 "*" return (operator(T_MULT, MULT)); 135 "/" return (operator(T_DIVOP, DIV)); 136 "%" return (operator(T_DIVOP, MOD)); 137 "!" return (operator(T_UNOP, NOT)); 138 "~" return (operator(T_UNOP, COMPL)); 139 "\"" return (string()); 140 "L\"" return (wcstrg()); 141 ";" return (T_SEMI); 142 "{" return (T_LBRACE); 143 "}" return (T_RBRACE); 144 "," return (T_COMMA); 145 ":" return (T_COLON); 146 "?" return (T_QUEST); 147 "[" return (T_LBRACK); 148 "]" return (T_RBRACK); 149 "(" return (T_LPARN); 150 ")" return (T_RPARN); 151 "..." return (T_ELLIPSE); 152 "'" return (ccon()); 153 "L'" return (wccon()); 154 ^#.*$ directive(); 155 \n incline(); 156 \t|" "|\f|\v ; 157 "/*" comment(); 158 "//" slashslashcomment(); 159 . badchar(yytext[0]); 160 161 %% 162 163 static void 164 incline(void) 165 { 166 curr_pos.p_line++; 167 curr_pos.p_uniq = 0; 168 if (curr_pos.p_file == csrc_pos.p_file) { 169 csrc_pos.p_line++; 170 csrc_pos.p_uniq = 0; 171 } 172 } 173 174 static void 175 badchar(int c) 176 { 177 178 /* unknown character \%o */ 179 error(250, c); 180 } 181 182 /* 183 * Keywords. 184 * During initialisation they are written to the symbol table. 185 */ 186 static struct kwtab { 187 const char *kw_name; /* keyword */ 188 int kw_token; /* token returned by yylex() */ 189 scl_t kw_scl; /* storage class if kw_token T_SCLASS */ 190 tspec_t kw_tspec; /* type spec. if kw_token T_TYPE or T_SOU */ 191 tqual_t kw_tqual; /* type qual. fi kw_token T_QUAL */ 192 u_int kw_c89; /* c89 keyword */ 193 u_int kw_c99; /* c99 keyword */ 194 u_int kw_gcc; /* GCC keyword */ 195 } kwtab[] = { 196 { "asm", T_ASM, 0, 0, 0, 0, 0, 1 }, 197 { "__asm", T_ASM, 0, 0, 0, 0, 0, 0 }, 198 { "__asm__", T_ASM, 0, 0, 0, 0, 0, 0 }, 199 { "auto", T_SCLASS, AUTO, 0, 0, 0, 0, 0 }, 200 { "break", T_BREAK, 0, 0, 0, 0, 0, 0 }, 201 { "_Bool", T_TYPE, 0, BOOL, 0, 0, 1, 0 }, 202 { "case", T_CASE, 0, 0, 0, 0, 0, 0 }, 203 { "char", T_TYPE, 0, CHAR, 0, 0, 0, 0 }, 204 { "const", T_QUAL, 0, 0, CONST, 1, 0, 0 }, 205 { "__const__", T_QUAL, 0, 0, CONST, 0, 0, 0 }, 206 { "__const", T_QUAL, 0, 0, CONST, 0, 0, 0 }, 207 { "continue", T_CONTINUE, 0, 0, 0, 0, 0, 0 }, 208 { "default", T_DEFAULT, 0, 0, 0, 0, 0, 0 }, 209 { "do", T_DO, 0, 0, 0, 0, 0, 0 }, 210 { "double", T_TYPE, 0, DOUBLE, 0, 0, 0, 0 }, 211 { "else", T_ELSE, 0, 0, 0, 0, 0, 0 }, 212 { "enum", T_ENUM, 0, 0, 0, 0, 0, 0 }, 213 { "extern", T_SCLASS, EXTERN, 0, 0, 0, 0, 0 }, 214 { "float", T_TYPE, 0, FLOAT, 0, 0, 0, 0 }, 215 { "for", T_FOR, 0, 0, 0, 0, 0, 0 }, 216 { "goto", T_GOTO, 0, 0, 0, 0, 0, 0 }, 217 { "if", T_IF, 0, 0, 0, 0, 0, 0 }, 218 { "inline", T_SCLASS, INLINE, 0, 0, 0, 1, 0 }, 219 { "__inline__", T_SCLASS, INLINE, 0, 0, 0, 0, 0 }, 220 { "__inline", T_SCLASS, INLINE, 0, 0, 0, 0, 0 }, 221 { "int", T_TYPE, 0, INT, 0, 0, 0, 0 }, 222 { "__symbolrename", T_SYMBOLRENAME, 0, 0, 0, 0, 0, 0 }, 223 { "long", T_TYPE, 0, LONG, 0, 0, 0, 0 }, 224 { "register", T_SCLASS, REG, 0, 0, 0, 0, 0 }, 225 { "return", T_RETURN, 0, 0, 0, 0, 0, 0 }, 226 { "short", T_TYPE, 0, SHORT, 0, 0, 0, 0 }, 227 { "signed", T_TYPE, 0, SIGNED, 0, 1, 0, 0 }, 228 { "__signed__", T_TYPE, 0, SIGNED, 0, 0, 0, 0 }, 229 { "__signed", T_TYPE, 0, SIGNED, 0, 0, 0, 0 }, 230 { "sizeof", T_SIZEOF, 0, 0, 0, 0, 0, 0 }, 231 { "static", T_SCLASS, STATIC, 0, 0, 0, 0, 0 }, 232 { "struct", T_SOU, 0, STRUCT, 0, 0, 0, 0 }, 233 { "switch", T_SWITCH, 0, 0, 0, 0, 0, 0 }, 234 { "typedef", T_SCLASS, TYPEDEF, 0, 0, 0, 0, 0 }, 235 { "union", T_SOU, 0, UNION, 0, 0, 0, 0 }, 236 { "unsigned", T_TYPE, 0, UNSIGN, 0, 0, 0, 0 }, 237 { "void", T_TYPE, 0, VOID, 0, 0, 0, 0 }, 238 { "volatile", T_QUAL, 0, 0, VOLATILE, 1, 0, 0 }, 239 { "__volatile__", T_QUAL, 0, 0, VOLATILE, 0, 0, 0 }, 240 { "__volatile", T_QUAL, 0, 0, VOLATILE, 0, 0, 0 }, 241 { "while", T_WHILE, 0, 0, 0, 0, 0, 0 }, 242 { NULL, 0, 0, 0, 0, 0, 0, 0 } 243 }; 244 245 /* Symbol table */ 246 static sym_t *symtab[HSHSIZ1]; 247 248 /* bit i of the entry with index i is set */ 249 uint64_t qbmasks[sizeof(uint64_t) * CHAR_BIT]; 250 251 /* least significant i bits are set in the entry with index i */ 252 uint64_t qlmasks[sizeof(uint64_t) * CHAR_BIT + 1]; 253 254 /* least significant i bits are not set in the entry with index i */ 255 uint64_t qumasks[sizeof(uint64_t) * CHAR_BIT + 1]; 256 257 /* free list for sbuf structures */ 258 static sbuf_t *sbfrlst; 259 260 /* Typ of next expected symbol */ 261 symt_t symtyp; 262 263 264 /* 265 * All keywords are written to the symbol table. This saves us looking 266 * in a extra table for each name we found. 267 */ 268 void 269 initscan(void) 270 { 271 struct kwtab *kw; 272 sym_t *sym; 273 int h, i; 274 uint64_t uq; 275 276 for (kw = kwtab; kw->kw_name != NULL; kw++) { 277 if ((kw->kw_c89 || kw->kw_c99) && tflag) 278 continue; 279 if (kw->kw_c99 && !(Sflag || gflag)) 280 continue; 281 if (kw->kw_gcc && !gflag) 282 continue; 283 sym = getblk(sizeof (sym_t)); 284 sym->s_name = kw->kw_name; 285 sym->s_keyw = 1; 286 sym->s_value.v_quad = kw->kw_token; 287 if (kw->kw_token == T_TYPE || kw->kw_token == T_SOU) { 288 sym->s_tspec = kw->kw_tspec; 289 } else if (kw->kw_token == T_SCLASS) { 290 sym->s_scl = kw->kw_scl; 291 } else if (kw->kw_token == T_QUAL) { 292 sym->s_tqual = kw->kw_tqual; 293 } 294 h = hash(sym->s_name); 295 if ((sym->s_link = symtab[h]) != NULL) 296 symtab[h]->s_rlink = &sym->s_link; 297 (symtab[h] = sym)->s_rlink = &symtab[h]; 298 } 299 300 /* initialize bit-masks for quads */ 301 for (i = 0; i < sizeof (uint64_t) * CHAR_BIT; i++) { 302 qbmasks[i] = (uint64_t)1 << i; 303 uq = ~(uint64_t)0 << i; 304 qumasks[i] = uq; 305 qlmasks[i] = ~uq; 306 } 307 qumasks[i] = 0; 308 qlmasks[i] = ~(uint64_t)0; 309 } 310 311 /* 312 * Get a free sbuf structure, if possible from the free list 313 */ 314 static sbuf_t * 315 allocsb(void) 316 { 317 sbuf_t *sb; 318 319 if ((sb = sbfrlst) != NULL) { 320 sbfrlst = sb->sb_nxt; 321 } else { 322 sb = xmalloc(sizeof (sbuf_t)); 323 } 324 (void)memset(sb, 0, sizeof (sb)); 325 return (sb); 326 } 327 328 /* 329 * Put a sbuf structure to the free list 330 */ 331 static void 332 freesb(sbuf_t *sb) 333 { 334 335 sb->sb_nxt = sbfrlst; 336 sbfrlst = sb; 337 } 338 339 /* 340 * Read a character and ensure that it is positive (except EOF). 341 * Increment line count(s) if necessary. 342 */ 343 static int 344 inpc(void) 345 { 346 int c; 347 348 if ((c = input()) != EOF && (c &= CHAR_MASK) == '\n') 349 incline(); 350 return (c); 351 } 352 353 static int 354 hash(const char *s) 355 { 356 u_int v; 357 const u_char *us; 358 359 v = 0; 360 for (us = (const u_char *)s; *us != '\0'; us++) { 361 v = (v << sizeof (v)) + *us; 362 v ^= v >> (sizeof (v) * CHAR_BIT - sizeof (v)); 363 } 364 return (v % HSHSIZ1); 365 } 366 367 /* 368 * Lex has found a letter followed by zero or more letters or digits. 369 * It looks for a symbol in the symbol table with the same name. This 370 * symbol must either be a keyword or a symbol of the type required by 371 * symtyp (label, member, tag, ...). 372 * 373 * If it is a keyword, the token is returned. In some cases it is described 374 * more deeply by data written to yylval. 375 * 376 * If it is a symbol, T_NAME is returned and the pointer to a sbuf struct 377 * is stored in yylval. This struct contains the name of the symbol, it's 378 * length and hash value. If there is already a symbol of the same name 379 * and type in the symbol table, the sbuf struct also contains a pointer 380 * to the symbol table entry. 381 */ 382 static int 383 name(void) 384 { 385 char *s; 386 sbuf_t *sb; 387 sym_t *sym; 388 int tok; 389 390 sb = allocsb(); 391 sb->sb_name = yytext; 392 sb->sb_len = yyleng; 393 sb->sb_hash = hash(yytext); 394 395 if ((sym = search(sb)) != NULL && sym->s_keyw) { 396 freesb(sb); 397 return (keyw(sym)); 398 } 399 400 sb->sb_sym = sym; 401 402 if (sym != NULL) { 403 if (blklev < sym->s_blklev) 404 LERROR("name()"); 405 sb->sb_name = sym->s_name; 406 sb->sb_len = strlen(sym->s_name); 407 tok = sym->s_scl == TYPEDEF ? T_TYPENAME : T_NAME; 408 } else { 409 s = getblk(yyleng + 1); 410 (void)memcpy(s, yytext, yyleng + 1); 411 sb->sb_name = s; 412 sb->sb_len = yyleng; 413 tok = T_NAME; 414 } 415 416 yylval.y_sb = sb; 417 return (tok); 418 } 419 420 static sym_t * 421 search(sbuf_t *sb) 422 { 423 sym_t *sym; 424 425 for (sym = symtab[sb->sb_hash]; sym != NULL; sym = sym->s_link) { 426 if (strcmp(sym->s_name, sb->sb_name) == 0) { 427 if (sym->s_keyw || sym->s_kind == symtyp) 428 return (sym); 429 } 430 } 431 432 return (NULL); 433 } 434 435 static int 436 keyw(sym_t *sym) 437 { 438 int t; 439 440 if ((t = (int)sym->s_value.v_quad) == T_SCLASS) { 441 yylval.y_scl = sym->s_scl; 442 } else if (t == T_TYPE || t == T_SOU) { 443 yylval.y_tspec = sym->s_tspec; 444 } else if (t == T_QUAL) { 445 yylval.y_tqual = sym->s_tqual; 446 } 447 return (t); 448 } 449 450 /* 451 * Convert a string representing an integer into internal representation. 452 * The value is returned in yylval. icon() (and yylex()) returns T_CON. 453 */ 454 static int 455 icon(int base) 456 { 457 int l_suffix, u_suffix; 458 int len; 459 const char *cp; 460 char c, *eptr; 461 tspec_t typ; 462 uint64_t uq = 0; 463 int ansiu; 464 static tspec_t contypes[2][3] = { 465 { INT, LONG, QUAD }, 466 { UINT, ULONG, UQUAD } 467 }; 468 469 cp = yytext; 470 len = yyleng; 471 472 /* skip 0x */ 473 if (base == 16) { 474 cp += 2; 475 len -= 2; 476 } 477 478 /* read suffixes */ 479 l_suffix = u_suffix = 0; 480 for ( ; ; ) { 481 if ((c = cp[len - 1]) == 'l' || c == 'L') { 482 l_suffix++; 483 } else if (c == 'u' || c == 'U') { 484 u_suffix++; 485 } else { 486 break; 487 } 488 len--; 489 } 490 if (l_suffix > 2 || u_suffix > 1) { 491 /* malformed integer constant */ 492 warning(251); 493 if (l_suffix > 2) 494 l_suffix = 2; 495 if (u_suffix > 1) 496 u_suffix = 1; 497 } 498 if (tflag && u_suffix != 0) { 499 /* suffix U is illegal in traditional C */ 500 warning(97); 501 } 502 typ = contypes[u_suffix][l_suffix]; 503 504 errno = 0; 505 506 uq = strtouq(cp, &eptr, base); 507 if (eptr != cp + len) 508 LERROR("icon()"); 509 if (errno != 0) 510 /* integer constant out of range */ 511 warning(252); 512 513 /* 514 * If the value is too big for the current type, we must choose 515 * another type. 516 */ 517 ansiu = 0; 518 switch (typ) { 519 case INT: 520 if (uq <= TARG_INT_MAX) { 521 /* ok */ 522 } else if (uq <= TARG_UINT_MAX && base != 10) { 523 typ = UINT; 524 } else if (uq <= TARG_LONG_MAX) { 525 typ = LONG; 526 } else { 527 typ = ULONG; 528 if (uq > TARG_ULONG_MAX) { 529 /* integer constant out of range */ 530 warning(252); 531 } 532 } 533 if (typ == UINT || typ == ULONG) { 534 if (tflag) { 535 typ = LONG; 536 } else if (!sflag) { 537 /* 538 * Remember that the constant is unsigned 539 * only in ANSI C 540 */ 541 ansiu = 1; 542 } 543 } 544 break; 545 case UINT: 546 if (uq > TARG_UINT_MAX) { 547 typ = ULONG; 548 if (uq > TARG_ULONG_MAX) { 549 /* integer constant out of range */ 550 warning(252); 551 } 552 } 553 break; 554 case LONG: 555 if (uq > TARG_LONG_MAX && !tflag) { 556 typ = ULONG; 557 if (!sflag) 558 ansiu = 1; 559 if (uq > TARG_ULONG_MAX) { 560 /* integer constant out of range */ 561 warning(252); 562 } 563 } 564 break; 565 case QUAD: 566 if (uq > TARG_QUAD_MAX && !tflag) { 567 typ = UQUAD; 568 if (!sflag) 569 ansiu = 1; 570 } 571 break; 572 /* LINTED (enumeration values not handled in switch) */ 573 case STRUCT: 574 case VOID: 575 case LDOUBLE: 576 case FUNC: 577 case ARRAY: 578 case PTR: 579 case ENUM: 580 case UNION: 581 case SIGNED: 582 case NOTSPEC: 583 case DOUBLE: 584 case FLOAT: 585 case UQUAD: 586 case ULONG: 587 case USHORT: 588 case SHORT: 589 case UCHAR: 590 case SCHAR: 591 case CHAR: 592 case BOOL: 593 case UNSIGN: 594 break; 595 596 case NTSPEC: /* this value unused */ 597 break; 598 } 599 600 uq = (uint64_t)xsign((int64_t)uq, typ, -1); 601 602 (yylval.y_val = xcalloc(1, sizeof (val_t)))->v_tspec = typ; 603 yylval.y_val->v_ansiu = ansiu; 604 yylval.y_val->v_quad = (int64_t)uq; 605 606 return (T_CON); 607 } 608 609 /* 610 * Returns 1 if t is a signed type and the value is negative. 611 * 612 * len is the number of significant bits. If len is -1, len is set 613 * to the width of type t. 614 */ 615 int 616 sign(int64_t q, tspec_t t, int len) 617 { 618 619 if (t == PTR || isutyp(t)) 620 return (0); 621 return (msb(q, t, len)); 622 } 623 624 int 625 msb(int64_t q, tspec_t t, int len) 626 { 627 628 if (len <= 0) 629 len = size(t); 630 return ((q & qbmasks[len - 1]) != 0); 631 } 632 633 /* 634 * Extends the sign of q. 635 */ 636 int64_t 637 xsign(int64_t q, tspec_t t, int len) 638 { 639 640 if (len <= 0) 641 len = size(t); 642 643 if (t == PTR || isutyp(t) || !sign(q, t, len)) { 644 q &= qlmasks[len]; 645 } else { 646 q |= qumasks[len]; 647 } 648 return (q); 649 } 650 651 /* 652 * Convert a string representing a floating point value into its interal 653 * representation. Type and value are returned in yylval. fcon() 654 * (and yylex()) returns T_CON. 655 * XXX Currently it is not possible to convert constants of type 656 * long double which are greater than DBL_MAX. 657 */ 658 static int 659 fcon(void) 660 { 661 const char *cp; 662 int len; 663 tspec_t typ; 664 char c, *eptr; 665 double d; 666 float f = 0; 667 668 cp = yytext; 669 len = yyleng; 670 671 if ((c = cp[len - 1]) == 'f' || c == 'F') { 672 typ = FLOAT; 673 len--; 674 } else if (c == 'l' || c == 'L') { 675 typ = LDOUBLE; 676 len--; 677 } else { 678 typ = DOUBLE; 679 } 680 681 if (tflag && typ != DOUBLE) { 682 /* suffixes F and L are illegal in traditional C */ 683 warning(98); 684 } 685 686 errno = 0; 687 d = strtod(cp, &eptr); 688 if (eptr != cp + len) { 689 switch (*eptr) { 690 /* 691 * XXX: non-native non-current strtod() may not handle hex 692 * floats, ignore the rest if we find traces of hex float 693 * syntax... 694 */ 695 case 'p': 696 case 'P': 697 case 'x': 698 case 'X': 699 d = 0; 700 errno = 0; 701 break; 702 default: 703 LERROR("fcon()"); 704 } 705 } 706 if (errno != 0) 707 /* floating-point constant out of range */ 708 warning(248); 709 710 if (typ == FLOAT) { 711 f = (float)d; 712 if (!finite(f)) { 713 /* floating-point constant out of range */ 714 warning(248); 715 f = f > 0 ? FLT_MAX : -FLT_MAX; 716 } 717 } 718 719 (yylval.y_val = xcalloc(1, sizeof (val_t)))->v_tspec = typ; 720 if (typ == FLOAT) { 721 yylval.y_val->v_ldbl = f; 722 } else { 723 yylval.y_val->v_ldbl = d; 724 } 725 726 return (T_CON); 727 } 728 729 static int 730 operator(int t, op_t o) 731 { 732 733 yylval.y_op = o; 734 return (t); 735 } 736 737 /* 738 * Called if lex found a leading \'. 739 */ 740 static int 741 ccon(void) 742 { 743 int n, val, c; 744 char cv; 745 746 n = 0; 747 val = 0; 748 while ((c = getescc('\'')) >= 0) { 749 val = (val << CHAR_BIT) + c; 750 n++; 751 } 752 if (c == -2) { 753 /* unterminated character constant */ 754 error(253); 755 } else { 756 if (n > sizeof (int) || (n > 1 && (pflag || hflag))) { 757 /* too many characters in character constant */ 758 error(71); 759 } else if (n > 1) { 760 /* multi-character character constant */ 761 warning(294); 762 } else if (n == 0) { 763 /* empty character constant */ 764 error(73); 765 } 766 } 767 if (n == 1) { 768 cv = (char)val; 769 val = cv; 770 } 771 772 yylval.y_val = xcalloc(1, sizeof (val_t)); 773 yylval.y_val->v_tspec = INT; 774 yylval.y_val->v_quad = val; 775 776 return (T_CON); 777 } 778 779 /* 780 * Called if lex found a leading L\' 781 */ 782 static int 783 wccon(void) 784 { 785 static char buf[MB_LEN_MAX + 1]; 786 int i, c; 787 wchar_t wc; 788 789 i = 0; 790 while ((c = getescc('\'')) >= 0) { 791 if (i < MB_CUR_MAX) 792 buf[i] = (char)c; 793 i++; 794 } 795 796 wc = 0; 797 798 if (c == -2) { 799 /* unterminated character constant */ 800 error(253); 801 } else if (c == 0) { 802 /* empty character constant */ 803 error(73); 804 } else { 805 if (i > MB_CUR_MAX) { 806 i = MB_CUR_MAX; 807 /* too many characters in character constant */ 808 error(71); 809 } else { 810 buf[i] = '\0'; 811 (void)mbtowc(NULL, NULL, 0); 812 if (mbtowc(&wc, buf, MB_CUR_MAX) < 0) 813 /* invalid multibyte character */ 814 error(291); 815 } 816 } 817 818 yylval.y_val = xcalloc(1, sizeof (val_t)); 819 yylval.y_val->v_tspec = WCHAR; 820 yylval.y_val->v_quad = wc; 821 822 return (T_CON); 823 } 824 825 /* 826 * Read a character which is part of a character constant or of a string 827 * and handle escapes. 828 * 829 * The Argument is the character which delimits the character constant or 830 * string. 831 * 832 * Returns -1 if the end of the character constant or string is reached, 833 * -2 if the EOF is reached, and the character otherwise. 834 */ 835 static int 836 getescc(int d) 837 { 838 static int pbc = -1; 839 int n, c, v; 840 841 if (pbc == -1) { 842 c = inpc(); 843 } else { 844 c = pbc; 845 pbc = -1; 846 } 847 if (c == d) 848 return (-1); 849 switch (c) { 850 case '\n': 851 if (tflag) { 852 /* newline in string or char constant */ 853 error(254); 854 return (-2); 855 } 856 return (c); 857 case EOF: 858 return (-2); 859 case '\\': 860 switch (c = inpc()) { 861 case '"': 862 if (tflag && d == '\'') 863 /* \" inside character constant undef. ... */ 864 warning(262); 865 return ('"'); 866 case '\'': 867 return ('\''); 868 case '?': 869 if (tflag) 870 /* \? undefined in traditional C */ 871 warning(263); 872 return ('?'); 873 case '\\': 874 return ('\\'); 875 case 'a': 876 if (tflag) 877 /* \a undefined in traditional C */ 878 warning(81); 879 return ('\a'); 880 case 'b': 881 return ('\b'); 882 case 'f': 883 return ('\f'); 884 case 'n': 885 return ('\n'); 886 case 'r': 887 return ('\r'); 888 case 't': 889 return ('\t'); 890 case 'v': 891 if (tflag) 892 /* \v undefined in traditional C */ 893 warning(264); 894 return ('\v'); 895 case '8': case '9': 896 /* bad octal digit %c */ 897 warning(77, c); 898 /* FALLTHROUGH */ 899 case '0': case '1': case '2': case '3': 900 case '4': case '5': case '6': case '7': 901 n = 3; 902 v = 0; 903 do { 904 v = (v << 3) + (c - '0'); 905 c = inpc(); 906 } while (--n && isdigit(c) && (tflag || c <= '7')); 907 if (tflag && n > 0 && isdigit(c)) 908 /* bad octal digit %c */ 909 warning(77, c); 910 pbc = c; 911 if (v > UCHAR_MAX) { 912 /* character escape does not fit in char. */ 913 warning(76); 914 v &= CHAR_MASK; 915 } 916 return (v); 917 case 'x': 918 if (tflag) 919 /* \x undefined in traditional C */ 920 warning(82); 921 v = 0; 922 n = 0; 923 while ((c = inpc()) >= 0 && isxdigit(c)) { 924 c = isdigit(c) ? 925 c - '0' : toupper(c) - 'A' + 10; 926 v = (v << 4) + c; 927 if (n >= 0) { 928 if ((v & ~CHAR_MASK) != 0) { 929 /* overflow in hex escape */ 930 warning(75); 931 n = -1; 932 } else { 933 n++; 934 } 935 } 936 } 937 pbc = c; 938 if (n == 0) { 939 /* no hex digits follow \x */ 940 error(74); 941 } if (n == -1) { 942 v &= CHAR_MASK; 943 } 944 return (v); 945 case '\n': 946 return (getescc(d)); 947 case EOF: 948 return (-2); 949 default: 950 if (isprint(c)) { 951 /* dubious escape \%c */ 952 warning(79, c); 953 } else { 954 /* dubious escape \%o */ 955 warning(80, c); 956 } 957 } 958 } 959 return (c); 960 } 961 962 /* 963 * Called for preprocessor directives. Currently implemented are: 964 * # lineno 965 * # lineno "filename" 966 */ 967 static void 968 directive(void) 969 { 970 const char *cp, *fn; 971 char c, *eptr; 972 size_t fnl; 973 long ln; 974 static int first = 1; 975 976 /* Go to first non-whitespace after # */ 977 for (cp = yytext + 1; (c = *cp) == ' ' || c == '\t'; cp++) 978 continue; 979 980 if (!isdigit((unsigned char)c)) { 981 error: 982 /* undefined or invalid # directive */ 983 warning(255); 984 return; 985 } 986 ln = strtol(--cp, &eptr, 10); 987 if (cp == eptr) 988 goto error; 989 if ((c = *(cp = eptr)) != ' ' && c != '\t' && c != '\0') 990 goto error; 991 while ((c = *cp++) == ' ' || c == '\t') 992 continue; 993 if (c != '\0') { 994 if (c != '"') 995 goto error; 996 fn = cp; 997 while ((c = *cp) != '"' && c != '\0') 998 cp++; 999 if (c != '"') 1000 goto error; 1001 if ((fnl = cp++ - fn) > PATH_MAX) 1002 goto error; 1003 while ((c = *cp++) == ' ' || c == '\t') 1004 continue; 1005 #if 0 1006 if (c != '\0') 1007 warning("extra character(s) after directive"); 1008 #endif 1009 1010 /* empty string means stdin */ 1011 if (fnl == 0) { 1012 fn = "{standard input}"; 1013 fnl = 16; /* strlen (fn) */ 1014 } 1015 curr_pos.p_file = fnnalloc(fn, fnl); 1016 /* 1017 * If this is the first directive, the name is the name 1018 * of the C source file as specified at the command line. 1019 * It is written to the output file. 1020 */ 1021 if (first) { 1022 csrc_pos.p_file = curr_pos.p_file; 1023 outsrc(curr_pos.p_file); 1024 first = 0; 1025 } 1026 } 1027 curr_pos.p_line = (int)ln - 1; 1028 curr_pos.p_uniq = 0; 1029 if (curr_pos.p_file == csrc_pos.p_file) { 1030 csrc_pos.p_line = (int)ln - 1; 1031 csrc_pos.p_uniq = 0; 1032 } 1033 } 1034 1035 /* 1036 * Handle lint comments. Following comments are currently understood: 1037 * ARGSUSEDn 1038 * BITFIELDTYPE 1039 * CONSTCOND CONSTANTCOND CONSTANTCONDITION 1040 * FALLTHRU FALLTHROUGH 1041 * LINTLIBRARY 1042 * LINTED NOSTRICT 1043 * LONGLONG 1044 * NOTREACHED 1045 * PRINTFLIKEn 1046 * PROTOLIB 1047 * SCANFLIKEn 1048 * VARARGSn 1049 * If one of this comments is recognized, the arguments, if any, are 1050 * parsed and a function which handles this comment is called. 1051 */ 1052 static void 1053 comment(void) 1054 { 1055 int c, lc; 1056 static struct { 1057 const char *keywd; 1058 int arg; 1059 void (*func)(int); 1060 } keywtab[] = { 1061 { "ARGSUSED", 1, argsused }, 1062 { "BITFIELDTYPE", 0, bitfieldtype }, 1063 { "CONSTCOND", 0, constcond }, 1064 { "CONSTANTCOND", 0, constcond }, 1065 { "CONSTANTCONDITION", 0, constcond }, 1066 { "FALLTHRU", 0, fallthru }, 1067 { "FALLTHROUGH", 0, fallthru }, 1068 { "LINTLIBRARY", 0, lintlib }, 1069 { "LINTED", 0, linted }, 1070 { "LONGLONG", 0, longlong }, 1071 { "NOSTRICT", 0, linted }, 1072 { "NOTREACHED", 0, notreach }, 1073 { "PRINTFLIKE", 1, printflike }, 1074 { "PROTOLIB", 1, protolib }, 1075 { "SCANFLIKE", 1, scanflike }, 1076 { "VARARGS", 1, varargs }, 1077 }; 1078 char keywd[32]; 1079 char arg[32]; 1080 int l, i, a; 1081 int eoc; 1082 1083 eoc = 0; 1084 1085 /* Skip white spaces after the start of the comment */ 1086 while ((c = inpc()) != EOF && isspace(c)) 1087 continue; 1088 1089 /* Read the potential keyword to keywd */ 1090 l = 0; 1091 while (c != EOF && isupper(c) && l < sizeof (keywd) - 1) { 1092 keywd[l++] = (char)c; 1093 c = inpc(); 1094 } 1095 keywd[l] = '\0'; 1096 1097 /* look for the keyword */ 1098 for (i = 0; i < sizeof (keywtab) / sizeof (keywtab[0]); i++) { 1099 if (strcmp(keywtab[i].keywd, keywd) == 0) 1100 break; 1101 } 1102 if (i == sizeof (keywtab) / sizeof (keywtab[0])) 1103 goto skip_rest; 1104 1105 /* skip white spaces after the keyword */ 1106 while (c != EOF && isspace(c)) 1107 c = inpc(); 1108 1109 /* read the argument, if the keyword accepts one and there is one */ 1110 l = 0; 1111 if (keywtab[i].arg) { 1112 while (c != EOF && isdigit(c) && l < sizeof (arg) - 1) { 1113 arg[l++] = (char)c; 1114 c = inpc(); 1115 } 1116 } 1117 arg[l] = '\0'; 1118 a = l != 0 ? atoi(arg) : -1; 1119 1120 /* skip white spaces after the argument */ 1121 while (c != EOF && isspace(c)) 1122 c = inpc(); 1123 1124 if (c != '*' || (c = inpc()) != '/') { 1125 if (keywtab[i].func != linted) 1126 /* extra characters in lint comment */ 1127 warning(257); 1128 } else { 1129 /* 1130 * remember that we have already found the end of the 1131 * comment 1132 */ 1133 eoc = 1; 1134 } 1135 1136 if (keywtab[i].func != NULL) 1137 (*keywtab[i].func)(a); 1138 1139 skip_rest: 1140 while (!eoc) { 1141 lc = c; 1142 if ((c = inpc()) == EOF) { 1143 /* unterminated comment */ 1144 error(256); 1145 break; 1146 } 1147 if (lc == '*' && c == '/') 1148 eoc = 1; 1149 } 1150 } 1151 1152 /* 1153 * Handle // style comments 1154 */ 1155 static void 1156 slashslashcomment(void) 1157 { 1158 int c; 1159 1160 if (!Sflag && !gflag) 1161 /* // comments only supported in C99 */ 1162 (void)gnuism(312, tflag ? "traditional" : "ANSI"); 1163 1164 while ((c = inpc()) != EOF && c != '\n') 1165 continue; 1166 } 1167 1168 /* 1169 * Clear flags for lint comments LINTED, LONGLONG and CONSTCOND. 1170 * clrwflgs() is called after function definitions and global and 1171 * local declarations and definitions. It is also called between 1172 * the controlling expression and the body of control statements 1173 * (if, switch, for, while). 1174 */ 1175 void 1176 clrwflgs(void) 1177 { 1178 1179 nowarn = 0; 1180 quadflg = 0; 1181 ccflg = 0; 1182 } 1183 1184 /* 1185 * Strings are stored in a dynamically alloceted buffer and passed 1186 * in yylval.y_xstrg to the parser. The parser or the routines called 1187 * by the parser are responsible for freeing this buffer. 1188 */ 1189 static int 1190 string(void) 1191 { 1192 u_char *s; 1193 int c; 1194 size_t len, max; 1195 strg_t *strg; 1196 1197 s = xmalloc(max = 64); 1198 1199 len = 0; 1200 while ((c = getescc('"')) >= 0) { 1201 /* +1 to reserve space for a trailing NUL character */ 1202 if (len + 1 == max) 1203 s = xrealloc(s, max *= 2); 1204 s[len++] = (char)c; 1205 } 1206 s[len] = '\0'; 1207 if (c == -2) 1208 /* unterminated string constant */ 1209 error(258); 1210 1211 strg = xcalloc(1, sizeof (strg_t)); 1212 strg->st_tspec = CHAR; 1213 strg->st_len = len; 1214 strg->st_cp = s; 1215 1216 yylval.y_strg = strg; 1217 return (T_STRING); 1218 } 1219 1220 static int 1221 wcstrg(void) 1222 { 1223 char *s; 1224 int c, i, n, wi; 1225 size_t len, max, wlen; 1226 wchar_t *ws; 1227 strg_t *strg; 1228 1229 s = xmalloc(max = 64); 1230 len = 0; 1231 while ((c = getescc('"')) >= 0) { 1232 /* +1 to save space for a trailing NUL character */ 1233 if (len + 1 >= max) 1234 s = xrealloc(s, max *= 2); 1235 s[len++] = (char)c; 1236 } 1237 s[len] = '\0'; 1238 if (c == -2) 1239 /* unterminated string constant */ 1240 error(258); 1241 1242 /* get length of wide character string */ 1243 (void)mblen(NULL, 0); 1244 for (i = 0, wlen = 0; i < len; i += n, wlen++) { 1245 if ((n = mblen(&s[i], MB_CUR_MAX)) == -1) { 1246 /* invalid multibyte character */ 1247 error(291); 1248 break; 1249 } 1250 if (n == 0) 1251 n = 1; 1252 } 1253 1254 ws = xmalloc((wlen + 1) * sizeof (wchar_t)); 1255 1256 /* convert from multibyte to wide char */ 1257 (void)mbtowc(NULL, NULL, 0); 1258 for (i = 0, wi = 0; i < len; i += n, wi++) { 1259 if ((n = mbtowc(&ws[wi], &s[i], MB_CUR_MAX)) == -1) 1260 break; 1261 if (n == 0) 1262 n = 1; 1263 } 1264 ws[wi] = 0; 1265 free(s); 1266 1267 strg = xcalloc(1, sizeof (strg_t)); 1268 strg->st_tspec = WCHAR; 1269 strg->st_len = wlen; 1270 strg->st_wcp = ws; 1271 1272 yylval.y_strg = strg; 1273 return (T_STRING); 1274 } 1275 1276 /* 1277 * As noted above the scanner does not create new symbol table entries 1278 * for symbols it cannot find in the symbol table. This is to avoid 1279 * putting undeclared symbols into the symbol table if a syntax error 1280 * occurs. 1281 * 1282 * getsym() is called as soon as it is probably ok to put the symbol to 1283 * the symbol table. This does not mean that it is not possible that 1284 * symbols are put to the symbol table which are than not completely 1285 * declared due to syntax errors. To avoid too many problems in this 1286 * case symbols get type int in getsym(). 1287 * 1288 * XXX calls to getsym() should be delayed until decl1*() is called 1289 */ 1290 sym_t * 1291 getsym(sbuf_t *sb) 1292 { 1293 dinfo_t *di; 1294 char *s; 1295 sym_t *sym; 1296 1297 sym = sb->sb_sym; 1298 1299 /* 1300 * During member declaration it is possible that name() looked 1301 * for symbols of type FVFT, although it should have looked for 1302 * symbols of type FTAG. Same can happen for labels. Both cases 1303 * are compensated here. 1304 */ 1305 if (symtyp == FMOS || symtyp == FLAB) { 1306 if (sym == NULL || sym->s_kind == FVFT) 1307 sym = search(sb); 1308 } 1309 1310 if (sym != NULL) { 1311 if (sym->s_kind != symtyp) 1312 LERROR("storesym()"); 1313 symtyp = FVFT; 1314 freesb(sb); 1315 return (sym); 1316 } 1317 1318 /* create a new symbol table entry */ 1319 1320 /* labels must always be allocated at level 1 (outhermost block) */ 1321 if (symtyp == FLAB) { 1322 sym = getlblk(1, sizeof (sym_t)); 1323 s = getlblk(1, sb->sb_len + 1); 1324 (void)memcpy(s, sb->sb_name, sb->sb_len + 1); 1325 sym->s_name = s; 1326 sym->s_blklev = 1; 1327 di = dcs; 1328 while (di->d_nxt != NULL && di->d_nxt->d_nxt != NULL) 1329 di = di->d_nxt; 1330 if (di->d_ctx != AUTO) 1331 LERROR("storesym()"); 1332 } else { 1333 sym = getblk(sizeof (sym_t)); 1334 sym->s_name = sb->sb_name; 1335 sym->s_blklev = blklev; 1336 di = dcs; 1337 } 1338 1339 UNIQUE_CURR_POS(sym->s_dpos); 1340 if ((sym->s_kind = symtyp) != FLAB) 1341 sym->s_type = gettyp(INT); 1342 1343 symtyp = FVFT; 1344 1345 if ((sym->s_link = symtab[sb->sb_hash]) != NULL) 1346 symtab[sb->sb_hash]->s_rlink = &sym->s_link; 1347 (symtab[sb->sb_hash] = sym)->s_rlink = &symtab[sb->sb_hash]; 1348 1349 *di->d_ldlsym = sym; 1350 di->d_ldlsym = &sym->s_dlnxt; 1351 1352 freesb(sb); 1353 return (sym); 1354 } 1355 1356 /* 1357 * Construct a temporary symbol. The symbol starts with a digit, so that 1358 * it is illegal. 1359 */ 1360 sym_t * 1361 mktempsym(type_t *t) 1362 { 1363 static int n = 0; 1364 int h; 1365 char *s = getlblk(blklev, 64); 1366 sym_t *sym = getblk(sizeof (sym_t)); 1367 1368 (void)snprintf(s, 64, "%.8d_tmp", n++); 1369 h = hash(s); 1370 1371 sym->s_name = s; 1372 sym->s_type = t; 1373 sym->s_blklev = blklev; 1374 sym->s_scl = AUTO; 1375 sym->s_kind = FVFT; 1376 sym->s_used = 1; 1377 sym->s_set = 1; 1378 1379 if ((sym->s_link = symtab[h]) != NULL) 1380 symtab[h]->s_rlink = &sym->s_link; 1381 (symtab[h] = sym)->s_rlink = &symtab[h]; 1382 1383 *dcs->d_ldlsym = sym; 1384 dcs->d_ldlsym = &sym->s_dlnxt; 1385 1386 return sym; 1387 } 1388 1389 /* 1390 * Remove a symbol forever from the symbol table. s_blklev 1391 * is set to -1 to avoid that the symbol will later be put 1392 * back to the symbol table. 1393 */ 1394 void 1395 rmsym(sym_t *sym) 1396 { 1397 1398 if ((*sym->s_rlink = sym->s_link) != NULL) 1399 sym->s_link->s_rlink = sym->s_rlink; 1400 sym->s_blklev = -1; 1401 sym->s_link = NULL; 1402 } 1403 1404 /* 1405 * Remove a list of symbols declared at one level from the symbol 1406 * table. 1407 */ 1408 void 1409 rmsyms(sym_t *syms) 1410 { 1411 sym_t *sym; 1412 1413 for (sym = syms; sym != NULL; sym = sym->s_dlnxt) { 1414 if (sym->s_blklev != -1) { 1415 if ((*sym->s_rlink = sym->s_link) != NULL) 1416 sym->s_link->s_rlink = sym->s_rlink; 1417 sym->s_link = NULL; 1418 sym->s_rlink = NULL; 1419 } 1420 } 1421 } 1422 1423 /* 1424 * Put a symbol into the symbol table 1425 */ 1426 void 1427 inssym(int bl, sym_t *sym) 1428 { 1429 int h; 1430 1431 h = hash(sym->s_name); 1432 if ((sym->s_link = symtab[h]) != NULL) 1433 symtab[h]->s_rlink = &sym->s_link; 1434 (symtab[h] = sym)->s_rlink = &symtab[h]; 1435 sym->s_blklev = bl; 1436 if (sym->s_link != NULL && sym->s_blklev < sym->s_link->s_blklev) 1437 LERROR("inssym()"); 1438 } 1439 1440 /* 1441 * Called at level 0 after syntax errors 1442 * Removes all symbols which are not declared at level 0 from the 1443 * symbol table. Also frees all memory which is not associated with 1444 * level 0. 1445 */ 1446 void 1447 cleanup(void) 1448 { 1449 sym_t *sym, *nsym; 1450 int i; 1451 1452 for (i = 0; i < HSHSIZ1; i++) { 1453 for (sym = symtab[i]; sym != NULL; sym = nsym) { 1454 nsym = sym->s_link; 1455 if (sym->s_blklev >= 1) { 1456 if ((*sym->s_rlink = nsym) != NULL) 1457 nsym->s_rlink = sym->s_rlink; 1458 } 1459 } 1460 } 1461 1462 for (i = mblklev; i > 0; i--) 1463 freelblk(i); 1464 } 1465 1466 /* 1467 * Create a new symbol with the name of an existing symbol. 1468 */ 1469 sym_t * 1470 pushdown(sym_t *sym) 1471 { 1472 int h; 1473 sym_t *nsym; 1474 1475 h = hash(sym->s_name); 1476 nsym = getblk(sizeof (sym_t)); 1477 if (sym->s_blklev > blklev) 1478 LERROR("pushdown()"); 1479 nsym->s_name = sym->s_name; 1480 UNIQUE_CURR_POS(nsym->s_dpos); 1481 nsym->s_kind = sym->s_kind; 1482 nsym->s_blklev = blklev; 1483 1484 if ((nsym->s_link = symtab[h]) != NULL) 1485 symtab[h]->s_rlink = &nsym->s_link; 1486 (symtab[h] = nsym)->s_rlink = &symtab[h]; 1487 1488 *dcs->d_ldlsym = nsym; 1489 dcs->d_ldlsym = &nsym->s_dlnxt; 1490 1491 return (nsym); 1492 } 1493 1494 /* 1495 * Free any dynamically allocated memory referenced by 1496 * the value stack or yylval. 1497 * The type of information in yylval is described by tok. 1498 */ 1499 void 1500 freeyyv(void *sp, int tok) 1501 { 1502 if (tok == T_NAME || tok == T_TYPENAME) { 1503 sbuf_t *sb = *(sbuf_t **)sp; 1504 freesb(sb); 1505 } else if (tok == T_CON) { 1506 val_t *val = *(val_t **)sp; 1507 free(val); 1508 } else if (tok == T_STRING) { 1509 strg_t *strg = *(strg_t **)sp; 1510 if (strg->st_tspec == CHAR) { 1511 free(strg->st_cp); 1512 } else if (strg->st_tspec == WCHAR) { 1513 free(strg->st_wcp); 1514 } else { 1515 LERROR("fryylv()"); 1516 } 1517 free(strg); 1518 } 1519 } 1520
Indexes created Tue Sep 30 20:09:53 GMT 2025