scan.l revision 1.47
1 %{ 2 /* $NetBSD: scan.l,v 1.47 2010/01/11 16:28:06 christos 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 1.47 2010/01/11 16:28:06 christos 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 54 /* Current position (its also updated when an included file is parsed) */ 55 pos_t curr_pos = { 1, "", 0 }; 56 57 /* 58 * Current position in C source (not updated when an included file is 59 * parsed). 60 */ 61 pos_t csrc_pos = { 1, "", 0 }; 62 63 static void incline(void); 64 static void badchar(int); 65 static sbuf_t *allocsb(void); 66 static void freesb(sbuf_t *); 67 static int inpc(void); 68 static int hash(const char *); 69 static sym_t *search(sbuf_t *); 70 static int name(void); 71 static int keyw(sym_t *); 72 static int icon(int); 73 static int fcon(void); 74 static int operator(int, op_t); 75 static int ccon(void); 76 static int wccon(void); 77 static int getescc(int); 78 static void directive(void); 79 static void comment(void); 80 static void slashslashcomment(void); 81 static int string(void); 82 static int wcstrg(void); 83 84 %} 85 86 L [_A-Za-z] 87 D [0-9] 88 NZD [1-9] 89 OD [0-7] 90 HD [0-9A-Fa-f] 91 EX ([eE][+-]?[0-9]+) 92 HX (p[+-]?[0-9A-Fa-f]+) 93 TL ([fFlL]?[i]?) 94 95 %option nounput 96 97 %% 98 99 {L}({L}|{D})* return (name()); 100 0{OD}*[lLuU]* return (icon(8)); 101 {NZD}{D}*[lLuU]* return (icon(10)); 102 0[xX]{HD}+[lLuU]* return (icon(16)); 103 {D}+\.{D}*{EX}?{TL} | 104 {D}+{EX}{TL} | 105 0[xX]{HD}+\.{HD}*{HX}{TL} | 106 0[xX]{HD}+{HX}{TL} | 107 \.{D}+{EX}?{TL} return (fcon()); 108 "=" return (operator(T_ASSIGN, ASSIGN)); 109 "*=" return (operator(T_OPASS, MULASS)); 110 "/=" return (operator(T_OPASS, DIVASS)); 111 "%=" return (operator(T_OPASS, MODASS)); 112 "+=" return (operator(T_OPASS, ADDASS)); 113 "-=" return (operator(T_OPASS, SUBASS)); 114 "<<=" return (operator(T_OPASS, SHLASS)); 115 ">>=" return (operator(T_OPASS, SHRASS)); 116 "&=" return (operator(T_OPASS, ANDASS)); 117 "^=" return (operator(T_OPASS, XORASS)); 118 "|=" return (operator(T_OPASS, ORASS)); 119 "||" return (operator(T_LOGOR, LOGOR)); 120 "&&" return (operator(T_LOGAND, LOGAND)); 121 "|" return (operator(T_OR, OR)); 122 "&" return (operator(T_AND, AND)); 123 "^" return (operator(T_XOR, XOR)); 124 "==" return (operator(T_EQOP, EQ)); 125 "!=" return (operator(T_EQOP, NE)); 126 "<" return (operator(T_RELOP, LT)); 127 ">" return (operator(T_RELOP, GT)); 128 "<=" return (operator(T_RELOP, LE)); 129 ">=" return (operator(T_RELOP, GE)); 130 "<<" return (operator(T_SHFTOP, SHL)); 131 ">>" return (operator(T_SHFTOP, SHR)); 132 "++" return (operator(T_INCDEC, INC)); 133 "--" return (operator(T_INCDEC, DEC)); 134 "->" return (operator(T_STROP, ARROW)); 135 "." return (operator(T_STROP, POINT)); 136 "+" return (operator(T_ADDOP, PLUS)); 137 "-" return (operator(T_ADDOP, MINUS)); 138 "*" return (operator(T_MULT, MULT)); 139 "/" return (operator(T_DIVOP, DIV)); 140 "%" return (operator(T_DIVOP, MOD)); 141 "!" return (operator(T_UNOP, NOT)); 142 "~" return (operator(T_UNOP, COMPL)); 143 "\"" return (string()); 144 "L\"" return (wcstrg()); 145 ";" return (T_SEMI); 146 "{" return (T_LBRACE); 147 "}" return (T_RBRACE); 148 "," return (T_COMMA); 149 ":" return (T_COLON); 150 "?" return (T_QUEST); 151 "[" return (T_LBRACK); 152 "]" return (T_RBRACK); 153 "(" return (T_LPARN); 154 ")" return (T_RPARN); 155 "..." return (T_ELLIPSE); 156 "'" return (ccon()); 157 "L'" return (wccon()); 158 ^#.*$ directive(); 159 \n incline(); 160 \t|" "|\f|\v ; 161 "/*" comment(); 162 "//" slashslashcomment(); 163 . badchar(yytext[0]); 164 165 %% 166 167 static void 168 incline(void) 169 { 170 curr_pos.p_line++; 171 curr_pos.p_uniq = 0; 172 if (curr_pos.p_file == csrc_pos.p_file) { 173 csrc_pos.p_line++; 174 csrc_pos.p_uniq = 0; 175 } 176 } 177 178 static void 179 badchar(int c) 180 { 181 182 /* unknown character \%o */ 183 error(250, c); 184 } 185 186 /* 187 * Keywords. 188 * During initialisation they are written to the symbol table. 189 */ 190 static struct kwtab { 191 const char *kw_name; /* keyword */ 192 int kw_token; /* token returned by yylex() */ 193 scl_t kw_scl; /* storage class if kw_token T_SCLASS */ 194 tspec_t kw_tspec; /* type spec. if kw_token T_TYPE or T_SOU */ 195 tqual_t kw_tqual; /* type qual. fi kw_token T_QUAL */ 196 u_int kw_c89; /* c89 keyword */ 197 u_int kw_c99; /* c99 keyword */ 198 u_int kw_gcc; /* GCC keyword */ 199 } kwtab[] = { 200 { "__alignof__", T_ALIGNOF, 0, 0, 0, 0, 0, 0 }, 201 { "__attribute__",T_ATTRIBUTE, 0, 0, 0, 0, 0, 1 }, 202 { "attribute", T_ATTRIBUTE, 0, 0, 0, 0, 0, 1 }, 203 { "__packed__", T_AT_PACKED, 0, 0, 0, 0, 0, 1 }, 204 { "packed", T_AT_PACKED, 0, 0, 0, 0, 0, 1 }, 205 { "__aligned__",T_AT_ALIGNED, 0, 0, 0, 0, 0, 1 }, 206 { "aligned", T_AT_ALIGNED, 0, 0, 0, 0, 0, 1 }, 207 { "__transparent_union__",T_AT_TUNION,0,0, 0, 0, 0, 1 }, 208 { "transparent_union",T_AT_TUNION,0, 0, 0, 0, 0, 1 }, 209 { "__unused__", T_AT_UNUSED, 0, 0, 0, 0, 0, 1 }, 210 { "unused", T_AT_UNUSED, 0, 0, 0, 0, 0, 1 }, 211 { "__deprecated__",T_AT_DEPRECATED,0, 0, 0, 0, 0, 1 }, 212 { "deprecated", T_AT_DEPRECATED,0, 0, 0, 0, 0, 1 }, 213 { "__may_alias__",T_AT_MAY_ALIAS,0, 0, 0, 0, 0, 1 }, 214 { "may_alias", T_AT_MAY_ALIAS, 0, 0, 0, 0, 0, 1 }, 215 { "asm", T_ASM, 0, 0, 0, 0, 0, 1 }, 216 { "__asm", T_ASM, 0, 0, 0, 0, 0, 0 }, 217 { "__asm__", T_ASM, 0, 0, 0, 0, 0, 0 }, 218 { "auto", T_SCLASS, AUTO, 0, 0, 0, 0, 0 }, 219 { "break", T_BREAK, 0, 0, 0, 0, 0, 0 }, 220 { "_Bool", T_TYPE, 0, BOOL, 0, 0, 1, 0 }, 221 { "case", T_CASE, 0, 0, 0, 0, 0, 0 }, 222 { "char", T_TYPE, 0, CHAR, 0, 0, 0, 0 }, 223 { "const", T_QUAL, 0, 0, CONST, 1, 0, 0 }, 224 { "_Complex", T_TYPE, 0, COMPLEX,0, 0, 1, 0 }, 225 { "__const__", T_QUAL, 0, 0, CONST, 0, 0, 0 }, 226 { "__const", T_QUAL, 0, 0, CONST, 0, 0, 0 }, 227 { "continue", T_CONTINUE, 0, 0, 0, 0, 0, 0 }, 228 { "default", T_DEFAULT, 0, 0, 0, 0, 0, 0 }, 229 { "do", T_DO, 0, 0, 0, 0, 0, 0 }, 230 { "double", T_TYPE, 0, DOUBLE, 0, 0, 0, 0 }, 231 { "else", T_ELSE, 0, 0, 0, 0, 0, 0 }, 232 { "enum", T_ENUM, 0, 0, 0, 0, 0, 0 }, 233 { "extern", T_SCLASS, EXTERN, 0, 0, 0, 0, 0 }, 234 { "float", T_TYPE, 0, FLOAT, 0, 0, 0, 0 }, 235 { "for", T_FOR, 0, 0, 0, 0, 0, 0 }, 236 { "goto", T_GOTO, 0, 0, 0, 0, 0, 0 }, 237 { "if", T_IF, 0, 0, 0, 0, 0, 0 }, 238 { "__imag__", T_IMAG, 0, 0, 0, 0, 1, 0 }, 239 { "inline", T_SCLASS, INLINE, 0, 0, 0, 1, 0 }, 240 { "__inline__", T_SCLASS, INLINE, 0, 0, 0, 0, 0 }, 241 { "__inline", T_SCLASS, INLINE, 0, 0, 0, 0, 0 }, 242 { "int", T_TYPE, 0, INT, 0, 0, 0, 0 }, 243 { "__symbolrename", T_SYMBOLRENAME, 0, 0, 0, 0, 0, 0 }, 244 { "long", T_TYPE, 0, LONG, 0, 0, 0, 0 }, 245 { "__real__", T_REAL, 0, 0, 0, 0, 1, 0 }, 246 { "register", T_SCLASS, REG, 0, 0, 0, 0, 0 }, 247 { "restrict", T_QUAL, 0, 0, RESTRICT, 0, 1, 0 }, 248 { "return", T_RETURN, 0, 0, 0, 0, 0, 0 }, 249 { "__packed", T_PACKED, 0, 0, 0, 0, 0, 0 }, 250 { "short", T_TYPE, 0, SHORT, 0, 0, 0, 0 }, 251 { "signed", T_TYPE, 0, SIGNED, 0, 1, 0, 0 }, 252 { "__signed__", T_TYPE, 0, SIGNED, 0, 0, 0, 0 }, 253 { "__signed", T_TYPE, 0, SIGNED, 0, 0, 0, 0 }, 254 { "sizeof", T_SIZEOF, 0, 0, 0, 0, 0, 0 }, 255 { "static", T_SCLASS, STATIC, 0, 0, 0, 0, 0 }, 256 { "struct", T_SOU, 0, STRUCT, 0, 0, 0, 0 }, 257 { "switch", T_SWITCH, 0, 0, 0, 0, 0, 0 }, 258 { "typedef", T_SCLASS, TYPEDEF, 0, 0, 0, 0, 0 }, 259 { "union", T_SOU, 0, UNION, 0, 0, 0, 0 }, 260 { "unsigned", T_TYPE, 0, UNSIGN, 0, 0, 0, 0 }, 261 { "void", T_TYPE, 0, VOID, 0, 0, 0, 0 }, 262 { "volatile", T_QUAL, 0, 0, VOLATILE, 1, 0, 0 }, 263 { "__volatile__", T_QUAL, 0, 0, VOLATILE, 0, 0, 0 }, 264 { "__volatile", T_QUAL, 0, 0, VOLATILE, 0, 0, 0 }, 265 { "while", T_WHILE, 0, 0, 0, 0, 0, 0 }, 266 { NULL, 0, 0, 0, 0, 0, 0, 0 } 267 }; 268 269 /* Symbol table */ 270 static sym_t *symtab[HSHSIZ1]; 271 272 /* bit i of the entry with index i is set */ 273 uint64_t qbmasks[sizeof(uint64_t) * CHAR_BIT]; 274 275 /* least significant i bits are set in the entry with index i */ 276 uint64_t qlmasks[sizeof(uint64_t) * CHAR_BIT + 1]; 277 278 /* least significant i bits are not set in the entry with index i */ 279 uint64_t qumasks[sizeof(uint64_t) * CHAR_BIT + 1]; 280 281 /* free list for sbuf structures */ 282 static sbuf_t *sbfrlst; 283 284 /* Typ of next expected symbol */ 285 symt_t symtyp; 286 287 288 /* 289 * All keywords are written to the symbol table. This saves us looking 290 * in a extra table for each name we found. 291 */ 292 void 293 initscan(void) 294 { 295 struct kwtab *kw; 296 sym_t *sym; 297 size_t h, i; 298 uint64_t uq; 299 300 for (kw = kwtab; kw->kw_name != NULL; kw++) { 301 if ((kw->kw_c89 || kw->kw_c99) && tflag) 302 continue; 303 if (kw->kw_c99 && !(Sflag || gflag)) 304 continue; 305 if (kw->kw_gcc && !gflag) 306 continue; 307 sym = getblk(sizeof (sym_t)); 308 sym->s_name = kw->kw_name; 309 sym->s_keyw = 1; 310 sym->s_value.v_quad = kw->kw_token; 311 if (kw->kw_token == T_TYPE || kw->kw_token == T_SOU) { 312 sym->s_tspec = kw->kw_tspec; 313 } else if (kw->kw_token == T_SCLASS) { 314 sym->s_scl = kw->kw_scl; 315 } else if (kw->kw_token == T_QUAL) { 316 sym->s_tqual = kw->kw_tqual; 317 } 318 h = hash(sym->s_name); 319 if ((sym->s_link = symtab[h]) != NULL) 320 symtab[h]->s_rlink = &sym->s_link; 321 (symtab[h] = sym)->s_rlink = &symtab[h]; 322 } 323 324 /* initialize bit-masks for quads */ 325 for (i = 0; i < sizeof (uint64_t) * CHAR_BIT; i++) { 326 qbmasks[i] = (uint64_t)1 << i; 327 uq = ~(uint64_t)0 << i; 328 qumasks[i] = uq; 329 qlmasks[i] = ~uq; 330 } 331 qumasks[i] = 0; 332 qlmasks[i] = ~(uint64_t)0; 333 } 334 335 /* 336 * Get a free sbuf structure, if possible from the free list 337 */ 338 static sbuf_t * 339 allocsb(void) 340 { 341 sbuf_t *sb; 342 343 if ((sb = sbfrlst) != NULL) { 344 sbfrlst = sb->sb_nxt; 345 } else { 346 sb = xmalloc(sizeof (sbuf_t)); 347 } 348 (void)memset(sb, 0, sizeof (*sb)); 349 return (sb); 350 } 351 352 /* 353 * Put a sbuf structure to the free list 354 */ 355 static void 356 freesb(sbuf_t *sb) 357 { 358 359 sb->sb_nxt = sbfrlst; 360 sbfrlst = sb; 361 } 362 363 /* 364 * Read a character and ensure that it is positive (except EOF). 365 * Increment line count(s) if necessary. 366 */ 367 static int 368 inpc(void) 369 { 370 int c; 371 372 if ((c = input()) != EOF && (c &= CHAR_MASK) == '\n') 373 incline(); 374 return (c); 375 } 376 377 static int 378 hash(const char *s) 379 { 380 u_int v; 381 const u_char *us; 382 383 v = 0; 384 for (us = (const u_char *)s; *us != '\0'; us++) { 385 v = (v << sizeof (v)) + *us; 386 v ^= v >> (sizeof (v) * CHAR_BIT - sizeof (v)); 387 } 388 return (v % HSHSIZ1); 389 } 390 391 /* 392 * Lex has found a letter followed by zero or more letters or digits. 393 * It looks for a symbol in the symbol table with the same name. This 394 * symbol must either be a keyword or a symbol of the type required by 395 * symtyp (label, member, tag, ...). 396 * 397 * If it is a keyword, the token is returned. In some cases it is described 398 * more deeply by data written to yylval. 399 * 400 * If it is a symbol, T_NAME is returned and the pointer to a sbuf struct 401 * is stored in yylval. This struct contains the name of the symbol, it's 402 * length and hash value. If there is already a symbol of the same name 403 * and type in the symbol table, the sbuf struct also contains a pointer 404 * to the symbol table entry. 405 */ 406 static int 407 name(void) 408 { 409 char *s; 410 sbuf_t *sb; 411 sym_t *sym; 412 int tok; 413 414 sb = allocsb(); 415 sb->sb_name = yytext; 416 sb->sb_len = yyleng; 417 sb->sb_hash = hash(yytext); 418 if ((sym = search(sb)) != NULL && sym->s_keyw) { 419 freesb(sb); 420 return (keyw(sym)); 421 } 422 423 sb->sb_sym = sym; 424 425 if (sym != NULL) { 426 if (blklev < sym->s_blklev) 427 LERROR("name()"); 428 sb->sb_name = sym->s_name; 429 sb->sb_len = strlen(sym->s_name); 430 tok = sym->s_scl == TYPEDEF ? T_TYPENAME : T_NAME; 431 } else { 432 s = getblk(yyleng + 1); 433 (void)memcpy(s, yytext, yyleng + 1); 434 sb->sb_name = s; 435 sb->sb_len = yyleng; 436 tok = T_NAME; 437 } 438 439 yylval.y_sb = sb; 440 return (tok); 441 } 442 443 static sym_t * 444 search(sbuf_t *sb) 445 { 446 sym_t *sym; 447 448 for (sym = symtab[sb->sb_hash]; sym != NULL; sym = sym->s_link) { 449 if (strcmp(sym->s_name, sb->sb_name) == 0) { 450 if (sym->s_keyw || sym->s_kind == symtyp) 451 return (sym); 452 } 453 } 454 455 return (NULL); 456 } 457 458 static int 459 keyw(sym_t *sym) 460 { 461 int t; 462 463 if ((t = (int)sym->s_value.v_quad) == T_SCLASS) { 464 yylval.y_scl = sym->s_scl; 465 } else if (t == T_TYPE || t == T_SOU) { 466 yylval.y_tspec = sym->s_tspec; 467 } else if (t == T_QUAL) { 468 yylval.y_tqual = sym->s_tqual; 469 } 470 return (t); 471 } 472 473 /* 474 * Convert a string representing an integer into internal representation. 475 * The value is returned in yylval. icon() (and yylex()) returns T_CON. 476 */ 477 static int 478 icon(int base) 479 { 480 int l_suffix, u_suffix; 481 int len; 482 const char *cp; 483 char c, *eptr; 484 tspec_t typ; 485 uint64_t uq = 0; 486 int ansiu; 487 static tspec_t contypes[2][3] = { 488 { INT, LONG, QUAD }, 489 { UINT, ULONG, UQUAD } 490 }; 491 492 cp = yytext; 493 len = yyleng; 494 495 /* skip 0x */ 496 if (base == 16) { 497 cp += 2; 498 len -= 2; 499 } 500 501 /* read suffixes */ 502 l_suffix = u_suffix = 0; 503 for ( ; ; ) { 504 if ((c = cp[len - 1]) == 'l' || c == 'L') { 505 l_suffix++; 506 } else if (c == 'u' || c == 'U') { 507 u_suffix++; 508 } else { 509 break; 510 } 511 len--; 512 } 513 if (l_suffix > 2 || u_suffix > 1) { 514 /* malformed integer constant */ 515 warning(251); 516 if (l_suffix > 2) 517 l_suffix = 2; 518 if (u_suffix > 1) 519 u_suffix = 1; 520 } 521 if (tflag && u_suffix != 0) { 522 /* suffix U is illegal in traditional C */ 523 warning(97); 524 } 525 typ = contypes[u_suffix][l_suffix]; 526 527 errno = 0; 528 529 uq = strtouq(cp, &eptr, base); 530 if (eptr != cp + len) 531 LERROR("icon()"); 532 if (errno != 0) 533 /* integer constant out of range */ 534 warning(252); 535 536 /* 537 * If the value is too big for the current type, we must choose 538 * another type. 539 */ 540 ansiu = 0; 541 switch (typ) { 542 case INT: 543 if (uq <= TARG_INT_MAX) { 544 /* ok */ 545 } else if (uq <= TARG_UINT_MAX && base != 10) { 546 typ = UINT; 547 } else if (uq <= TARG_LONG_MAX) { 548 typ = LONG; 549 } else { 550 typ = ULONG; 551 if (uq > TARG_ULONG_MAX) { 552 /* integer constant out of range */ 553 warning(252); 554 } 555 } 556 if (typ == UINT || typ == ULONG) { 557 if (tflag) { 558 typ = LONG; 559 } else if (!sflag) { 560 /* 561 * Remember that the constant is unsigned 562 * only in ANSI C 563 */ 564 ansiu = 1; 565 } 566 } 567 break; 568 case UINT: 569 if (uq > TARG_UINT_MAX) { 570 typ = ULONG; 571 if (uq > TARG_ULONG_MAX) { 572 /* integer constant out of range */ 573 warning(252); 574 } 575 } 576 break; 577 case LONG: 578 if (uq > TARG_LONG_MAX && !tflag) { 579 typ = ULONG; 580 if (!sflag) 581 ansiu = 1; 582 if (uq > TARG_ULONG_MAX) { 583 /* integer constant out of range */ 584 warning(252); 585 } 586 } 587 break; 588 case ULONG: 589 if (uq > TARG_ULONG_MAX) { 590 /* integer constant out of range */ 591 warning(252); 592 } 593 break; 594 case QUAD: 595 if (uq > TARG_QUAD_MAX && !tflag) { 596 typ = UQUAD; 597 if (!sflag) 598 ansiu = 1; 599 } 600 break; 601 case UQUAD: 602 if (uq > TARG_UQUAD_MAX) { 603 /* integer constant out of range */ 604 warning(252); 605 } 606 break; 607 /* LINTED (enumeration values not handled in switch) */ 608 case STRUCT: 609 case VOID: 610 case LDOUBLE: 611 case FUNC: 612 case ARRAY: 613 case PTR: 614 case ENUM: 615 case UNION: 616 case SIGNED: 617 case NOTSPEC: 618 case DOUBLE: 619 case FLOAT: 620 case USHORT: 621 case SHORT: 622 case UCHAR: 623 case SCHAR: 624 case CHAR: 625 case BOOL: 626 case UNSIGN: 627 case FCOMPLEX: 628 case DCOMPLEX: 629 case LCOMPLEX: 630 case COMPLEX: 631 break; 632 633 case NTSPEC: /* this value unused */ 634 break; 635 } 636 637 uq = (uint64_t)xsign((int64_t)uq, typ, -1); 638 639 (yylval.y_val = xcalloc(1, sizeof (val_t)))->v_tspec = typ; 640 yylval.y_val->v_ansiu = ansiu; 641 yylval.y_val->v_quad = (int64_t)uq; 642 643 return (T_CON); 644 } 645 646 /* 647 * Returns 1 if t is a signed type and the value is negative. 648 * 649 * len is the number of significant bits. If len is -1, len is set 650 * to the width of type t. 651 */ 652 int 653 sign(int64_t q, tspec_t t, int len) 654 { 655 656 if (t == PTR || isutyp(t)) 657 return (0); 658 return (msb(q, t, len)); 659 } 660 661 int 662 msb(int64_t q, tspec_t t, int len) 663 { 664 665 if (len <= 0) 666 len = size(t); 667 return ((q & qbmasks[len - 1]) != 0); 668 } 669 670 /* 671 * Extends the sign of q. 672 */ 673 int64_t 674 xsign(int64_t q, tspec_t t, int len) 675 { 676 677 if (len <= 0) 678 len = size(t); 679 680 if (t == PTR || isutyp(t) || !sign(q, t, len)) { 681 q &= qlmasks[len]; 682 } else { 683 q |= qumasks[len]; 684 } 685 return (q); 686 } 687 688 /* 689 * Convert a string representing a floating point value into its interal 690 * representation. Type and value are returned in yylval. fcon() 691 * (and yylex()) returns T_CON. 692 * XXX Currently it is not possible to convert constants of type 693 * long double which are greater than DBL_MAX. 694 */ 695 static int 696 fcon(void) 697 { 698 const char *cp; 699 int len; 700 tspec_t typ; 701 char c, *eptr; 702 double d; 703 float f = 0; 704 705 cp = yytext; 706 len = yyleng; 707 708 if (cp[len - 1] == 'i') { 709 /* imaginary, do nothing for now */ 710 len--; 711 } 712 if ((c = cp[len - 1]) == 'f' || c == 'F') { 713 typ = FLOAT; 714 len--; 715 } else if (c == 'l' || c == 'L') { 716 typ = LDOUBLE; 717 len--; 718 } else { 719 typ = DOUBLE; 720 } 721 722 if (tflag && typ != DOUBLE) { 723 /* suffixes F and L are illegal in traditional C */ 724 warning(98); 725 } 726 727 errno = 0; 728 d = strtod(cp, &eptr); 729 if (eptr != cp + len) { 730 switch (*eptr) { 731 /* 732 * XXX: non-native non-current strtod() may not handle hex 733 * floats, ignore the rest if we find traces of hex float 734 * syntax... 735 */ 736 case 'p': 737 case 'P': 738 case 'x': 739 case 'X': 740 d = 0; 741 errno = 0; 742 break; 743 default: 744 LERROR("fcon()"); 745 } 746 } 747 if (errno != 0) 748 /* floating-point constant out of range */ 749 warning(248); 750 751 if (typ == FLOAT) { 752 f = (float)d; 753 if (!finite(f)) { 754 /* floating-point constant out of range */ 755 warning(248); 756 f = f > 0 ? FLT_MAX : -FLT_MAX; 757 } 758 } 759 760 (yylval.y_val = xcalloc(1, sizeof (val_t)))->v_tspec = typ; 761 if (typ == FLOAT) { 762 yylval.y_val->v_ldbl = f; 763 } else { 764 yylval.y_val->v_ldbl = d; 765 } 766 767 return (T_CON); 768 } 769 770 static int 771 operator(int t, op_t o) 772 { 773 774 yylval.y_op = o; 775 return (t); 776 } 777 778 /* 779 * Called if lex found a leading \'. 780 */ 781 static int 782 ccon(void) 783 { 784 size_t n; 785 int val, c; 786 char cv; 787 788 n = 0; 789 val = 0; 790 while ((c = getescc('\'')) >= 0) { 791 val = (val << CHAR_BIT) + c; 792 n++; 793 } 794 if (c == -2) { 795 /* unterminated character constant */ 796 error(253); 797 } else { 798 if (n > sizeof (int) || (n > 1 && (pflag || hflag))) { 799 /* too many characters in character constant */ 800 error(71); 801 } else if (n > 1) { 802 /* multi-character character constant */ 803 warning(294); 804 } else if (n == 0) { 805 /* empty character constant */ 806 error(73); 807 } 808 } 809 if (n == 1) { 810 cv = (char)val; 811 val = cv; 812 } 813 814 yylval.y_val = xcalloc(1, sizeof (val_t)); 815 yylval.y_val->v_tspec = INT; 816 yylval.y_val->v_quad = val; 817 818 return (T_CON); 819 } 820 821 /* 822 * Called if lex found a leading L\' 823 */ 824 static int 825 wccon(void) 826 { 827 static char buf[MB_LEN_MAX + 1]; 828 size_t i; 829 int c; 830 wchar_t wc; 831 832 i = 0; 833 while ((c = getescc('\'')) >= 0) { 834 if (i < MB_CUR_MAX) 835 buf[i] = (char)c; 836 i++; 837 } 838 839 wc = 0; 840 841 if (c == -2) { 842 /* unterminated character constant */ 843 error(253); 844 } else if (c == 0) { 845 /* empty character constant */ 846 error(73); 847 } else { 848 if (i > MB_CUR_MAX) { 849 i = MB_CUR_MAX; 850 /* too many characters in character constant */ 851 error(71); 852 } else { 853 buf[i] = '\0'; 854 (void)mbtowc(NULL, NULL, 0); 855 if (mbtowc(&wc, buf, MB_CUR_MAX) < 0) 856 /* invalid multibyte character */ 857 error(291); 858 } 859 } 860 861 yylval.y_val = xcalloc(1, sizeof (val_t)); 862 yylval.y_val->v_tspec = WCHAR; 863 yylval.y_val->v_quad = wc; 864 865 return (T_CON); 866 } 867 868 /* 869 * Read a character which is part of a character constant or of a string 870 * and handle escapes. 871 * 872 * The Argument is the character which delimits the character constant or 873 * string. 874 * 875 * Returns -1 if the end of the character constant or string is reached, 876 * -2 if the EOF is reached, and the character otherwise. 877 */ 878 static int 879 getescc(int d) 880 { 881 static int pbc = -1; 882 int n, c, v; 883 884 if (pbc == -1) { 885 c = inpc(); 886 } else { 887 c = pbc; 888 pbc = -1; 889 } 890 if (c == d) 891 return (-1); 892 switch (c) { 893 case '\n': 894 if (tflag) { 895 /* newline in string or char constant */ 896 error(254); 897 return (-2); 898 } 899 return (c); 900 case EOF: 901 return (-2); 902 case '\\': 903 switch (c = inpc()) { 904 case '"': 905 if (tflag && d == '\'') 906 /* \" inside character constant undef. ... */ 907 warning(262); 908 return ('"'); 909 case '\'': 910 return ('\''); 911 case '?': 912 if (tflag) 913 /* \? undefined in traditional C */ 914 warning(263); 915 return ('?'); 916 case '\\': 917 return ('\\'); 918 case 'a': 919 if (tflag) 920 /* \a undefined in traditional C */ 921 warning(81); 922 return ('\a'); 923 case 'b': 924 return ('\b'); 925 case 'f': 926 return ('\f'); 927 case 'n': 928 return ('\n'); 929 case 'r': 930 return ('\r'); 931 case 't': 932 return ('\t'); 933 case 'v': 934 if (tflag) 935 /* \v undefined in traditional C */ 936 warning(264); 937 return ('\v'); 938 case '8': case '9': 939 /* bad octal digit %c */ 940 warning(77, c); 941 /* FALLTHROUGH */ 942 case '0': case '1': case '2': case '3': 943 case '4': case '5': case '6': case '7': 944 n = 3; 945 v = 0; 946 do { 947 v = (v << 3) + (c - '0'); 948 c = inpc(); 949 } while (--n && isdigit(c) && (tflag || c <= '7')); 950 if (tflag && n > 0 && isdigit(c)) 951 /* bad octal digit %c */ 952 warning(77, c); 953 pbc = c; 954 if (v > UCHAR_MAX) { 955 /* character escape does not fit in char. */ 956 warning(76); 957 v &= CHAR_MASK; 958 } 959 return (v); 960 case 'x': 961 if (tflag) 962 /* \x undefined in traditional C */ 963 warning(82); 964 v = 0; 965 n = 0; 966 while ((c = inpc()) >= 0 && isxdigit(c)) { 967 c = isdigit(c) ? 968 c - '0' : toupper(c) - 'A' + 10; 969 v = (v << 4) + c; 970 if (n >= 0) { 971 if ((v & ~CHAR_MASK) != 0) { 972 /* overflow in hex escape */ 973 warning(75); 974 n = -1; 975 } else { 976 n++; 977 } 978 } 979 } 980 pbc = c; 981 if (n == 0) { 982 /* no hex digits follow \x */ 983 error(74); 984 } if (n == -1) { 985 v &= CHAR_MASK; 986 } 987 return (v); 988 case '\n': 989 return (getescc(d)); 990 case EOF: 991 return (-2); 992 default: 993 if (isprint(c)) { 994 /* dubious escape \%c */ 995 warning(79, c); 996 } else { 997 /* dubious escape \%o */ 998 warning(80, c); 999 } 1000 } 1001 } 1002 return (c); 1003 } 1004 1005 /* 1006 * Called for preprocessor directives. Currently implemented are: 1007 * # lineno 1008 * # lineno "filename" 1009 */ 1010 static void 1011 directive(void) 1012 { 1013 const char *cp, *fn; 1014 char c, *eptr; 1015 size_t fnl; 1016 long ln; 1017 static int first = 1; 1018 1019 /* Go to first non-whitespace after # */ 1020 for (cp = yytext + 1; (c = *cp) == ' ' || c == '\t'; cp++) 1021 continue; 1022 1023 if (!isdigit((unsigned char)c)) { 1024 error: 1025 /* undefined or invalid # directive */ 1026 warning(255); 1027 return; 1028 } 1029 ln = strtol(--cp, &eptr, 10); 1030 if (cp == eptr) 1031 goto error; 1032 if ((c = *(cp = eptr)) != ' ' && c != '\t' && c != '\0') 1033 goto error; 1034 while ((c = *cp++) == ' ' || c == '\t') 1035 continue; 1036 if (c != '\0') { 1037 if (c != '"') 1038 goto error; 1039 fn = cp; 1040 while ((c = *cp) != '"' && c != '\0') 1041 cp++; 1042 if (c != '"') 1043 goto error; 1044 if ((fnl = cp++ - fn) > PATH_MAX) 1045 goto error; 1046 while ((c = *cp++) == ' ' || c == '\t') 1047 continue; 1048 #if 0 1049 if (c != '\0') 1050 warning("extra character(s) after directive"); 1051 #endif 1052 1053 /* empty string means stdin */ 1054 if (fnl == 0) { 1055 fn = "{standard input}"; 1056 fnl = 16; /* strlen (fn) */ 1057 } 1058 curr_pos.p_file = fnnalloc(fn, fnl); 1059 /* 1060 * If this is the first directive, the name is the name 1061 * of the C source file as specified at the command line. 1062 * It is written to the output file. 1063 */ 1064 if (first) { 1065 csrc_pos.p_file = curr_pos.p_file; 1066 outsrc(curr_pos.p_file); 1067 first = 0; 1068 } 1069 } 1070 curr_pos.p_line = (int)ln - 1; 1071 curr_pos.p_uniq = 0; 1072 if (curr_pos.p_file == csrc_pos.p_file) { 1073 csrc_pos.p_line = (int)ln - 1; 1074 csrc_pos.p_uniq = 0; 1075 } 1076 } 1077 1078 /* 1079 * Handle lint comments. Following comments are currently understood: 1080 * ARGSUSEDn 1081 * BITFIELDTYPE 1082 * CONSTCOND CONSTANTCOND CONSTANTCONDITION 1083 * FALLTHRU FALLTHROUGH 1084 * LINTLIBRARY 1085 * LINTED NOSTRICT 1086 * LONGLONG 1087 * NOTREACHED 1088 * PRINTFLIKEn 1089 * PROTOLIB 1090 * SCANFLIKEn 1091 * VARARGSn 1092 * If one of this comments is recognized, the arguments, if any, are 1093 * parsed and a function which handles this comment is called. 1094 */ 1095 static void 1096 comment(void) 1097 { 1098 int c, lc; 1099 static struct { 1100 const char *keywd; 1101 int arg; 1102 void (*func)(int); 1103 } keywtab[] = { 1104 { "ARGSUSED", 1, argsused }, 1105 { "BITFIELDTYPE", 0, bitfieldtype }, 1106 { "CONSTCOND", 0, constcond }, 1107 { "CONSTANTCOND", 0, constcond }, 1108 { "CONSTANTCONDITION", 0, constcond }, 1109 { "FALLTHRU", 0, fallthru }, 1110 { "FALLTHROUGH", 0, fallthru }, 1111 { "LINTLIBRARY", 0, lintlib }, 1112 { "LINTED", 0, linted }, 1113 { "LONGLONG", 0, longlong }, 1114 { "NOSTRICT", 0, linted }, 1115 { "NOTREACHED", 0, notreach }, 1116 { "PRINTFLIKE", 1, printflike }, 1117 { "PROTOLIB", 1, protolib }, 1118 { "SCANFLIKE", 1, scanflike }, 1119 { "VARARGS", 1, varargs }, 1120 }; 1121 char keywd[32]; 1122 char arg[32]; 1123 size_t l, i; 1124 int a; 1125 int eoc; 1126 1127 eoc = 0; 1128 1129 /* Skip white spaces after the start of the comment */ 1130 while ((c = inpc()) != EOF && isspace(c)) 1131 continue; 1132 1133 /* Read the potential keyword to keywd */ 1134 l = 0; 1135 while (c != EOF && isupper(c) && l < sizeof (keywd) - 1) { 1136 keywd[l++] = (char)c; 1137 c = inpc(); 1138 } 1139 keywd[l] = '\0'; 1140 1141 /* look for the keyword */ 1142 for (i = 0; i < sizeof (keywtab) / sizeof (keywtab[0]); i++) { 1143 if (strcmp(keywtab[i].keywd, keywd) == 0) 1144 break; 1145 } 1146 if (i == sizeof (keywtab) / sizeof (keywtab[0])) 1147 goto skip_rest; 1148 1149 /* skip white spaces after the keyword */ 1150 while (c != EOF && isspace(c)) 1151 c = inpc(); 1152 1153 /* read the argument, if the keyword accepts one and there is one */ 1154 l = 0; 1155 if (keywtab[i].arg) { 1156 while (c != EOF && isdigit(c) && l < sizeof (arg) - 1) { 1157 arg[l++] = (char)c; 1158 c = inpc(); 1159 } 1160 } 1161 arg[l] = '\0'; 1162 a = l != 0 ? atoi(arg) : -1; 1163 1164 /* skip white spaces after the argument */ 1165 while (c != EOF && isspace(c)) 1166 c = inpc(); 1167 1168 if (c != '*' || (c = inpc()) != '/') { 1169 if (keywtab[i].func != linted) 1170 /* extra characters in lint comment */ 1171 warning(257); 1172 } else { 1173 /* 1174 * remember that we have already found the end of the 1175 * comment 1176 */ 1177 eoc = 1; 1178 } 1179 1180 if (keywtab[i].func != NULL) 1181 (*keywtab[i].func)(a); 1182 1183 skip_rest: 1184 while (!eoc) { 1185 lc = c; 1186 if ((c = inpc()) == EOF) { 1187 /* unterminated comment */ 1188 error(256); 1189 break; 1190 } 1191 if (lc == '*' && c == '/') 1192 eoc = 1; 1193 } 1194 } 1195 1196 /* 1197 * Handle // style comments 1198 */ 1199 static void 1200 slashslashcomment(void) 1201 { 1202 int c; 1203 1204 if (!Sflag && !gflag) 1205 /* // comments only supported in C99 */ 1206 (void)gnuism(312, tflag ? "traditional" : "ANSI"); 1207 1208 while ((c = inpc()) != EOF && c != '\n') 1209 continue; 1210 } 1211 1212 /* 1213 * Clear flags for lint comments LINTED, LONGLONG and CONSTCOND. 1214 * clrwflgs() is called after function definitions and global and 1215 * local declarations and definitions. It is also called between 1216 * the controlling expression and the body of control statements 1217 * (if, switch, for, while). 1218 */ 1219 void 1220 clrwflgs(void) 1221 { 1222 1223 nowarn = 0; 1224 quadflg = 0; 1225 ccflg = 0; 1226 } 1227 1228 /* 1229 * Strings are stored in a dynamically alloceted buffer and passed 1230 * in yylval.y_xstrg to the parser. The parser or the routines called 1231 * by the parser are responsible for freeing this buffer. 1232 */ 1233 static int 1234 string(void) 1235 { 1236 u_char *s; 1237 int c; 1238 size_t len, max; 1239 strg_t *strg; 1240 1241 s = xmalloc(max = 64); 1242 1243 len = 0; 1244 while ((c = getescc('"')) >= 0) { 1245 /* +1 to reserve space for a trailing NUL character */ 1246 if (len + 1 == max) 1247 s = xrealloc(s, max *= 2); 1248 s[len++] = (char)c; 1249 } 1250 s[len] = '\0'; 1251 if (c == -2) 1252 /* unterminated string constant */ 1253 error(258); 1254 1255 strg = xcalloc(1, sizeof (strg_t)); 1256 strg->st_tspec = CHAR; 1257 strg->st_len = len; 1258 strg->st_cp = s; 1259 1260 yylval.y_strg = strg; 1261 return (T_STRING); 1262 } 1263 1264 static int 1265 wcstrg(void) 1266 { 1267 char *s; 1268 int c, n; 1269 size_t i, wi; 1270 size_t len, max, wlen; 1271 wchar_t *ws; 1272 strg_t *strg; 1273 1274 s = xmalloc(max = 64); 1275 len = 0; 1276 while ((c = getescc('"')) >= 0) { 1277 /* +1 to save space for a trailing NUL character */ 1278 if (len + 1 >= max) 1279 s = xrealloc(s, max *= 2); 1280 s[len++] = (char)c; 1281 } 1282 s[len] = '\0'; 1283 if (c == -2) 1284 /* unterminated string constant */ 1285 error(258); 1286 1287 /* get length of wide character string */ 1288 (void)mblen(NULL, 0); 1289 for (i = 0, wlen = 0; i < len; i += n, wlen++) { 1290 if ((n = mblen(&s[i], MB_CUR_MAX)) == -1) { 1291 /* invalid multibyte character */ 1292 error(291); 1293 break; 1294 } 1295 if (n == 0) 1296 n = 1; 1297 } 1298 1299 ws = xmalloc((wlen + 1) * sizeof (wchar_t)); 1300 1301 /* convert from multibyte to wide char */ 1302 (void)mbtowc(NULL, NULL, 0); 1303 for (i = 0, wi = 0; i < len; i += n, wi++) { 1304 if ((n = mbtowc(&ws[wi], &s[i], MB_CUR_MAX)) == -1) 1305 break; 1306 if (n == 0) 1307 n = 1; 1308 } 1309 ws[wi] = 0; 1310 free(s); 1311 1312 strg = xcalloc(1, sizeof (strg_t)); 1313 strg->st_tspec = WCHAR; 1314 strg->st_len = wlen; 1315 strg->st_wcp = ws; 1316 1317 yylval.y_strg = strg; 1318 return (T_STRING); 1319 } 1320 1321 /* 1322 * As noted above the scanner does not create new symbol table entries 1323 * for symbols it cannot find in the symbol table. This is to avoid 1324 * putting undeclared symbols into the symbol table if a syntax error 1325 * occurs. 1326 * 1327 * getsym() is called as soon as it is probably ok to put the symbol to 1328 * the symbol table. This does not mean that it is not possible that 1329 * symbols are put to the symbol table which are than not completely 1330 * declared due to syntax errors. To avoid too many problems in this 1331 * case symbols get type int in getsym(). 1332 * 1333 * XXX calls to getsym() should be delayed until decl1*() is called 1334 */ 1335 sym_t * 1336 getsym(sbuf_t *sb) 1337 { 1338 dinfo_t *di; 1339 char *s; 1340 sym_t *sym; 1341 1342 sym = sb->sb_sym; 1343 1344 /* 1345 * During member declaration it is possible that name() looked 1346 * for symbols of type FVFT, although it should have looked for 1347 * symbols of type FTAG. Same can happen for labels. Both cases 1348 * are compensated here. 1349 */ 1350 if (symtyp == FMOS || symtyp == FLAB) { 1351 if (sym == NULL || sym->s_kind == FVFT) 1352 sym = search(sb); 1353 } 1354 1355 if (sym != NULL) { 1356 if (sym->s_kind != symtyp) 1357 LERROR("storesym()"); 1358 symtyp = FVFT; 1359 freesb(sb); 1360 return (sym); 1361 } 1362 1363 /* create a new symbol table entry */ 1364 1365 /* labels must always be allocated at level 1 (outhermost block) */ 1366 if (symtyp == FLAB) { 1367 sym = getlblk(1, sizeof (sym_t)); 1368 s = getlblk(1, sb->sb_len + 1); 1369 (void)memcpy(s, sb->sb_name, sb->sb_len + 1); 1370 sym->s_name = s; 1371 sym->s_blklev = 1; 1372 di = dcs; 1373 while (di->d_nxt != NULL && di->d_nxt->d_nxt != NULL) 1374 di = di->d_nxt; 1375 if (di->d_ctx != AUTO) 1376 LERROR("storesym()"); 1377 } else { 1378 sym = getblk(sizeof (sym_t)); 1379 sym->s_name = sb->sb_name; 1380 sym->s_blklev = blklev; 1381 di = dcs; 1382 } 1383 1384 UNIQUE_CURR_POS(sym->s_dpos); 1385 if ((sym->s_kind = symtyp) != FLAB) 1386 sym->s_type = gettyp(INT); 1387 1388 symtyp = FVFT; 1389 1390 if ((sym->s_link = symtab[sb->sb_hash]) != NULL) 1391 symtab[sb->sb_hash]->s_rlink = &sym->s_link; 1392 (symtab[sb->sb_hash] = sym)->s_rlink = &symtab[sb->sb_hash]; 1393 1394 *di->d_ldlsym = sym; 1395 di->d_ldlsym = &sym->s_dlnxt; 1396 1397 freesb(sb); 1398 return (sym); 1399 } 1400 1401 /* 1402 * Construct a temporary symbol. The symbol starts with a digit, so that 1403 * it is illegal. 1404 */ 1405 sym_t * 1406 mktempsym(type_t *t) 1407 { 1408 static int n = 0; 1409 int h; 1410 char *s = getlblk(blklev, 64); 1411 sym_t *sym = getblk(sizeof (sym_t)); 1412 1413 (void)snprintf(s, 64, "%.8d_tmp", n++); 1414 h = hash(s); 1415 1416 sym->s_name = s; 1417 sym->s_type = t; 1418 sym->s_blklev = blklev; 1419 sym->s_scl = AUTO; 1420 sym->s_kind = FVFT; 1421 sym->s_used = 1; 1422 sym->s_set = 1; 1423 1424 if ((sym->s_link = symtab[h]) != NULL) 1425 symtab[h]->s_rlink = &sym->s_link; 1426 (symtab[h] = sym)->s_rlink = &symtab[h]; 1427 1428 *dcs->d_ldlsym = sym; 1429 dcs->d_ldlsym = &sym->s_dlnxt; 1430 1431 return sym; 1432 } 1433 1434 /* 1435 * Remove a symbol forever from the symbol table. s_blklev 1436 * is set to -1 to avoid that the symbol will later be put 1437 * back to the symbol table. 1438 */ 1439 void 1440 rmsym(sym_t *sym) 1441 { 1442 1443 if ((*sym->s_rlink = sym->s_link) != NULL) 1444 sym->s_link->s_rlink = sym->s_rlink; 1445 sym->s_blklev = -1; 1446 sym->s_link = NULL; 1447 } 1448 1449 /* 1450 * Remove a list of symbols declared at one level from the symbol 1451 * table. 1452 */ 1453 void 1454 rmsyms(sym_t *syms) 1455 { 1456 sym_t *sym; 1457 1458 for (sym = syms; sym != NULL; sym = sym->s_dlnxt) { 1459 if (sym->s_blklev != -1) { 1460 if ((*sym->s_rlink = sym->s_link) != NULL) 1461 sym->s_link->s_rlink = sym->s_rlink; 1462 sym->s_link = NULL; 1463 sym->s_rlink = NULL; 1464 } 1465 } 1466 } 1467 1468 /* 1469 * Put a symbol into the symbol table 1470 */ 1471 void 1472 inssym(int bl, sym_t *sym) 1473 { 1474 int h; 1475 1476 h = hash(sym->s_name); 1477 if ((sym->s_link = symtab[h]) != NULL) 1478 symtab[h]->s_rlink = &sym->s_link; 1479 (symtab[h] = sym)->s_rlink = &symtab[h]; 1480 sym->s_blklev = bl; 1481 if (sym->s_link != NULL && sym->s_blklev < sym->s_link->s_blklev) 1482 LERROR("inssym()"); 1483 } 1484 1485 /* 1486 * Called at level 0 after syntax errors 1487 * Removes all symbols which are not declared at level 0 from the 1488 * symbol table. Also frees all memory which is not associated with 1489 * level 0. 1490 */ 1491 void 1492 cleanup(void) 1493 { 1494 sym_t *sym, *nsym; 1495 int i; 1496 1497 for (i = 0; i < HSHSIZ1; i++) { 1498 for (sym = symtab[i]; sym != NULL; sym = nsym) { 1499 nsym = sym->s_link; 1500 if (sym->s_blklev >= 1) { 1501 if ((*sym->s_rlink = nsym) != NULL) 1502 nsym->s_rlink = sym->s_rlink; 1503 } 1504 } 1505 } 1506 1507 for (i = mblklev; i > 0; i--) 1508 freelblk(i); 1509 } 1510 1511 /* 1512 * Create a new symbol with the name of an existing symbol. 1513 */ 1514 sym_t * 1515 pushdown(sym_t *sym) 1516 { 1517 int h; 1518 sym_t *nsym; 1519 1520 h = hash(sym->s_name); 1521 nsym = getblk(sizeof (sym_t)); 1522 if (sym->s_blklev > blklev) 1523 LERROR("pushdown()"); 1524 nsym->s_name = sym->s_name; 1525 UNIQUE_CURR_POS(nsym->s_dpos); 1526 nsym->s_kind = sym->s_kind; 1527 nsym->s_blklev = blklev; 1528 1529 if ((nsym->s_link = symtab[h]) != NULL) 1530 symtab[h]->s_rlink = &nsym->s_link; 1531 (symtab[h] = nsym)->s_rlink = &symtab[h]; 1532 1533 *dcs->d_ldlsym = nsym; 1534 dcs->d_ldlsym = &nsym->s_dlnxt; 1535 1536 return (nsym); 1537 } 1538 1539 /* 1540 * Free any dynamically allocated memory referenced by 1541 * the value stack or yylval. 1542 * The type of information in yylval is described by tok. 1543 */ 1544 void 1545 freeyyv(void *sp, int tok) 1546 { 1547 if (tok == T_NAME || tok == T_TYPENAME) { 1548 sbuf_t *sb = *(sbuf_t **)sp; 1549 freesb(sb); 1550 } else if (tok == T_CON) { 1551 val_t *val = *(val_t **)sp; 1552 free(val); 1553 } else if (tok == T_STRING) { 1554 strg_t *strg = *(strg_t **)sp; 1555 if (strg->st_tspec == CHAR) { 1556 free(strg->st_cp); 1557 } else if (strg->st_tspec == WCHAR) { 1558 free(strg->st_wcp); 1559 } else { 1560 LERROR("fryylv()"); 1561 } 1562 free(strg); 1563 } 1564 } 1565
Indexes created Thu Oct 02 14:10:14 GMT 2025