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1.1 ! root 1: /* Lexical analyser for C and Objective C. ! 2: Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc. ! 3: ! 4: This file is part of GNU CC. ! 5: ! 6: GNU CC 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, or (at your option) ! 9: any later version. ! 10: ! 11: GNU CC 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 GNU CC; see the file COPYING. If not, write to ! 18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ ! 19: ! 20: ! 21: #include <stdio.h> ! 22: #include <errno.h> ! 23: #include <setjmp.h> ! 24: ! 25: #include "config.h" ! 26: #include "rtl.h" ! 27: #include "tree.h" ! 28: #include "input.h" ! 29: #include "c-lex.h" ! 30: #include "c-tree.h" ! 31: #include "flags.h" ! 32: #include "c-parse.h" ! 33: ! 34: #ifdef MULTIBYTE_CHARS ! 35: #include <stdlib.h> ! 36: #include <locale.h> ! 37: #endif ! 38: ! 39: #ifndef errno ! 40: extern int errno; ! 41: #endif ! 42: ! 43: /* The elements of `ridpointers' are identifier nodes ! 44: for the reserved type names and storage classes. ! 45: It is indexed by a RID_... value. */ ! 46: tree ridpointers[(int) RID_MAX]; ! 47: ! 48: /* Cause the `yydebug' variable to be defined. */ ! 49: #define YYDEBUG 1 ! 50: ! 51: /* the declaration found for the last IDENTIFIER token read in. ! 52: yylex must look this up to detect typedefs, which get token type TYPENAME, ! 53: so it is left around in case the identifier is not a typedef but is ! 54: used in a context which makes it a reference to a variable. */ ! 55: tree lastiddecl; ! 56: ! 57: /* Nonzero enables objc features. */ ! 58: ! 59: int doing_objc_thang; ! 60: ! 61: extern tree lookup_interface (); ! 62: ! 63: extern int yydebug; ! 64: ! 65: /* File used for outputting assembler code. */ ! 66: extern FILE *asm_out_file; ! 67: ! 68: #ifndef WCHAR_TYPE_SIZE ! 69: #ifdef INT_TYPE_SIZE ! 70: #define WCHAR_TYPE_SIZE INT_TYPE_SIZE ! 71: #else ! 72: #define WCHAR_TYPE_SIZE BITS_PER_WORD ! 73: #endif ! 74: #endif ! 75: ! 76: /* Number of bytes in a wide character. */ ! 77: #define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT) ! 78: ! 79: static int maxtoken; /* Current nominal length of token buffer. */ ! 80: char *token_buffer; /* Pointer to token buffer. ! 81: Actual allocated length is maxtoken + 2. ! 82: This is not static because objc-parse.y uses it. */ ! 83: ! 84: /* Nonzero if end-of-file has been seen on input. */ ! 85: static int end_of_file; ! 86: ! 87: /* Buffered-back input character; faster than using ungetc. */ ! 88: static int nextchar = -1; ! 89: ! 90: int check_newline (); ! 91: ! 92: /* Nonzero tells yylex to ignore \ in string constants. */ ! 93: static int ignore_escape_flag = 0; ! 94: ! 95: /* C code produced by gperf version 2.5 (GNU C++ version) */ ! 96: /* Command-line: gperf -p -j1 -i 1 -g -o -t -N is_reserved_word -k1,3,$ c-parse.gperf */ ! 97: struct resword { char *name; short token; enum rid rid; }; ! 98: ! 99: #define TOTAL_KEYWORDS 53 ! 100: #define MIN_WORD_LENGTH 2 ! 101: #define MAX_WORD_LENGTH 13 ! 102: #define MIN_HASH_VALUE 7 ! 103: #define MAX_HASH_VALUE 102 ! 104: /* maximum key range = 96, duplicates = 0 */ ! 105: ! 106: #ifdef __GNUC__ ! 107: __inline ! 108: #endif ! 109: static unsigned int ! 110: hash (str, len) ! 111: register char *str; ! 112: register int unsigned len; ! 113: { ! 114: static unsigned char asso_values[] = ! 115: { ! 116: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 117: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 118: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 119: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 120: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 121: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 122: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 123: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 124: 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, ! 125: 103, 103, 103, 103, 103, 1, 103, 2, 1, 24, ! 126: 1, 5, 19, 39, 16, 13, 103, 1, 25, 1, ! 127: 34, 34, 24, 103, 13, 12, 1, 45, 24, 7, ! 128: 103, 103, 2, 103, 103, 103, 103, 103, ! 129: }; ! 130: register int hval = len; ! 131: ! 132: switch (hval) ! 133: { ! 134: default: ! 135: case 3: ! 136: hval += asso_values[str[2]]; ! 137: case 2: ! 138: case 1: ! 139: hval += asso_values[str[0]]; ! 140: } ! 141: return hval + asso_values[str[len - 1]]; ! 142: } ! 143: ! 144: #ifdef __GNUC__ ! 145: __inline ! 146: #endif ! 147: struct resword * ! 148: is_reserved_word (str, len) ! 149: register char *str; ! 150: register unsigned int len; ! 151: { ! 152: static struct resword wordlist[] = ! 153: { ! 154: {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, ! 155: {"asm", ASM, NORID}, ! 156: {"",}, ! 157: {"__asm", ASM, NORID}, ! 158: {"",}, ! 159: {"__asm__", ASM, NORID}, ! 160: {"break", BREAK, NORID}, ! 161: {"__typeof__", TYPEOF, NORID}, ! 162: {"",}, ! 163: {"__alignof__", ALIGNOF, NORID}, ! 164: {"",}, ! 165: {"__attribute__", ATTRIBUTE, NORID}, ! 166: {"int", TYPESPEC, RID_INT}, ! 167: {"__attribute", ATTRIBUTE, NORID}, ! 168: {"__extension__", EXTENSION, NORID}, ! 169: {"",}, ! 170: {"__signed", TYPESPEC, RID_SIGNED}, ! 171: {"",}, ! 172: {"__signed__", TYPESPEC, RID_SIGNED}, ! 173: {"__inline__", SCSPEC, RID_INLINE}, ! 174: {"else", ELSE, NORID}, ! 175: {"__inline", SCSPEC, RID_INLINE}, ! 176: {"default", DEFAULT, NORID}, ! 177: {"__typeof", TYPEOF, NORID}, ! 178: {"while", WHILE, NORID}, ! 179: {"__alignof", ALIGNOF, NORID}, ! 180: {"struct", STRUCT, NORID}, ! 181: {"__const", TYPE_QUAL, RID_CONST}, ! 182: {"if", IF, NORID}, ! 183: {"__const__", TYPE_QUAL, RID_CONST}, ! 184: {"__label__", LABEL, NORID}, ! 185: {"do", DO, NORID}, ! 186: {"__volatile__", TYPE_QUAL, RID_VOLATILE}, ! 187: {"sizeof", SIZEOF, NORID}, ! 188: {"__volatile", TYPE_QUAL, RID_VOLATILE}, ! 189: {"auto", SCSPEC, RID_AUTO}, ! 190: {"void", TYPESPEC, RID_VOID}, ! 191: {"char", TYPESPEC, RID_CHAR}, ! 192: {"static", SCSPEC, RID_STATIC}, ! 193: {"case", CASE, NORID}, ! 194: {"extern", SCSPEC, RID_EXTERN}, ! 195: {"switch", SWITCH, NORID}, ! 196: {"for", FOR, NORID}, ! 197: {"inline", SCSPEC, RID_INLINE}, ! 198: {"typeof", TYPEOF, NORID}, ! 199: {"typedef", SCSPEC, RID_TYPEDEF}, ! 200: {"short", TYPESPEC, RID_SHORT}, ! 201: {"",}, ! 202: {"return", RETURN, NORID}, ! 203: {"enum", ENUM, NORID}, ! 204: {"",}, ! 205: {"double", TYPESPEC, RID_DOUBLE}, ! 206: {"signed", TYPESPEC, RID_SIGNED}, ! 207: {"float", TYPESPEC, RID_FLOAT}, ! 208: {"",}, {"",}, ! 209: {"volatile", TYPE_QUAL, RID_VOLATILE}, ! 210: {"",}, ! 211: {"const", TYPE_QUAL, RID_CONST}, ! 212: {"",}, ! 213: {"unsigned", TYPESPEC, RID_UNSIGNED}, ! 214: {"",}, {"",}, {"",}, {"",}, ! 215: {"continue", CONTINUE, NORID}, ! 216: {"",}, ! 217: {"register", SCSPEC, RID_REGISTER}, ! 218: {"",}, {"",}, {"",}, {"",}, ! 219: {"goto", GOTO, NORID}, ! 220: {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, ! 221: {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, ! 222: ! 223: {"union", UNION, NORID}, ! 224: {"",}, {"",}, {"",}, {"",}, ! 225: {"long", TYPESPEC, RID_LONG}, ! 226: }; ! 227: ! 228: if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH) ! 229: { ! 230: register int key = hash (str, len); ! 231: ! 232: if (key <= MAX_HASH_VALUE && key >= 0) ! 233: { ! 234: register char *s = wordlist[key].name; ! 235: ! 236: if (*s == *str && !strcmp (str + 1, s + 1)) ! 237: return &wordlist[key]; ! 238: } ! 239: } ! 240: return 0; ! 241: } ! 242: ! 243: /* Return something to represent absolute declarators containing a *. ! 244: TARGET is the absolute declarator that the * contains. ! 245: TYPE_QUALS is a list of modifiers such as const or volatile ! 246: to apply to the pointer type, represented as identifiers. ! 247: ! 248: We return an INDIRECT_REF whose "contents" are TARGET ! 249: and whose type is the modifier list. */ ! 250: ! 251: tree ! 252: make_pointer_declarator (type_quals, target) ! 253: tree type_quals, target; ! 254: { ! 255: return build1 (INDIRECT_REF, type_quals, target); ! 256: } ! 257: ! 258: void ! 259: init_lex () ! 260: { ! 261: /* Make identifier nodes long enough for the language-specific slots. */ ! 262: set_identifier_size (sizeof (struct lang_identifier)); ! 263: ! 264: /* Start it at 0, because check_newline is called at the very beginning ! 265: and will increment it to 1. */ ! 266: lineno = 0; ! 267: ! 268: #ifdef MULTIBYTE_CHARS ! 269: /* Change to the native locale for multibyte conversions. */ ! 270: setlocale (LC_CTYPE, ""); ! 271: #endif ! 272: ! 273: maxtoken = 40; ! 274: token_buffer = (char *) xmalloc (maxtoken + 2); ! 275: ! 276: ridpointers[(int) RID_INT] = get_identifier ("int"); ! 277: ridpointers[(int) RID_CHAR] = get_identifier ("char"); ! 278: ridpointers[(int) RID_VOID] = get_identifier ("void"); ! 279: ridpointers[(int) RID_FLOAT] = get_identifier ("float"); ! 280: ridpointers[(int) RID_DOUBLE] = get_identifier ("double"); ! 281: ridpointers[(int) RID_SHORT] = get_identifier ("short"); ! 282: ridpointers[(int) RID_LONG] = get_identifier ("long"); ! 283: ridpointers[(int) RID_UNSIGNED] = get_identifier ("unsigned"); ! 284: ridpointers[(int) RID_SIGNED] = get_identifier ("signed"); ! 285: ridpointers[(int) RID_INLINE] = get_identifier ("inline"); ! 286: ridpointers[(int) RID_CONST] = get_identifier ("const"); ! 287: ridpointers[(int) RID_VOLATILE] = get_identifier ("volatile"); ! 288: ridpointers[(int) RID_AUTO] = get_identifier ("auto"); ! 289: ridpointers[(int) RID_STATIC] = get_identifier ("static"); ! 290: ridpointers[(int) RID_EXTERN] = get_identifier ("extern"); ! 291: ridpointers[(int) RID_TYPEDEF] = get_identifier ("typedef"); ! 292: ridpointers[(int) RID_REGISTER] = get_identifier ("register"); ! 293: ! 294: /* Some options inhibit certain reserved words. ! 295: Clear those words out of the hash table so they won't be recognized. */ ! 296: #define UNSET_RESERVED_WORD(STRING) \ ! 297: do { struct resword *s = is_reserved_word (STRING, sizeof (STRING) - 1); \ ! 298: if (s) s->name = ""; } while (0) ! 299: ! 300: if (flag_traditional) ! 301: { ! 302: UNSET_RESERVED_WORD ("const"); ! 303: UNSET_RESERVED_WORD ("volatile"); ! 304: UNSET_RESERVED_WORD ("typeof"); ! 305: UNSET_RESERVED_WORD ("signed"); ! 306: UNSET_RESERVED_WORD ("inline"); ! 307: } ! 308: if (flag_no_asm) ! 309: { ! 310: UNSET_RESERVED_WORD ("asm"); ! 311: UNSET_RESERVED_WORD ("typeof"); ! 312: UNSET_RESERVED_WORD ("inline"); ! 313: } ! 314: } ! 315: ! 316: void ! 317: reinit_parse_for_function () ! 318: { ! 319: } ! 320: ! 321: /* Function used when yydebug is set, to print a token in more detail. */ ! 322: ! 323: void ! 324: yyprint (file, yychar, yylval) ! 325: FILE *file; ! 326: int yychar; ! 327: YYSTYPE yylval; ! 328: { ! 329: tree t; ! 330: switch (yychar) ! 331: { ! 332: case IDENTIFIER: ! 333: case TYPENAME: ! 334: t = yylval.ttype; ! 335: if (IDENTIFIER_POINTER (t)) ! 336: fprintf (file, " `%s'", IDENTIFIER_POINTER (t)); ! 337: break; ! 338: ! 339: case CONSTANT: ! 340: t = yylval.ttype; ! 341: if (TREE_CODE (t) == INTEGER_CST) ! 342: fprintf (file, " 0x%8x%8x", TREE_INT_CST_HIGH (t), ! 343: TREE_INT_CST_LOW (t)); ! 344: break; ! 345: } ! 346: } ! 347: ! 348: ! 349: /* If C is not whitespace, return C. ! 350: Otherwise skip whitespace and return first nonwhite char read. */ ! 351: ! 352: static int ! 353: skip_white_space (c) ! 354: register int c; ! 355: { ! 356: #if 0 ! 357: register int inside; ! 358: #endif ! 359: ! 360: for (;;) ! 361: { ! 362: switch (c) ! 363: { ! 364: /* Don't recognize comments in cc1: all comments are removed by cpp, ! 365: and cpp output can include / and * consecutively as operators. */ ! 366: #if 0 ! 367: case '/': ! 368: c = getc (finput); ! 369: if (c != '*') ! 370: { ! 371: ungetc (c, finput); ! 372: return '/'; ! 373: } ! 374: ! 375: c = getc (finput); ! 376: ! 377: inside = 1; ! 378: while (inside) ! 379: { ! 380: if (c == '*') ! 381: { ! 382: while (c == '*') ! 383: c = getc (finput); ! 384: ! 385: if (c == '/') ! 386: { ! 387: inside = 0; ! 388: c = getc (finput); ! 389: } ! 390: } ! 391: else if (c == '\n') ! 392: { ! 393: lineno++; ! 394: c = getc (finput); ! 395: } ! 396: else if (c == EOF) ! 397: { ! 398: error ("unterminated comment"); ! 399: break; ! 400: } ! 401: else ! 402: c = getc (finput); ! 403: } ! 404: ! 405: break; ! 406: #endif ! 407: ! 408: case '\n': ! 409: c = check_newline (); ! 410: break; ! 411: ! 412: case ' ': ! 413: case '\t': ! 414: case '\f': ! 415: #if 0 /* ANSI says no. */ ! 416: case '\r': ! 417: #endif ! 418: case '\v': ! 419: case '\b': ! 420: c = getc (finput); ! 421: break; ! 422: ! 423: case '\\': ! 424: c = getc (finput); ! 425: if (c == '\n') ! 426: lineno++; ! 427: else ! 428: error ("stray '\\' in program"); ! 429: c = getc (finput); ! 430: break; ! 431: ! 432: default: ! 433: return (c); ! 434: } ! 435: } ! 436: } ! 437: ! 438: /* Skips all of the white space at the current location in the input file. ! 439: Must use and reset nextchar if it has the next character. */ ! 440: ! 441: void ! 442: position_after_white_space () ! 443: { ! 444: register int c; ! 445: ! 446: if (nextchar != -1) ! 447: c = nextchar, nextchar = -1; ! 448: else ! 449: c = getc (finput); ! 450: ! 451: ungetc (skip_white_space (c), finput); ! 452: } ! 453: ! 454: /* Make the token buffer longer, preserving the data in it. ! 455: P should point to just beyond the last valid character in the old buffer. ! 456: The value we return is a pointer to the new buffer ! 457: at a place corresponding to P. */ ! 458: ! 459: static char * ! 460: extend_token_buffer (p) ! 461: char *p; ! 462: { ! 463: int offset = p - token_buffer; ! 464: ! 465: maxtoken = maxtoken * 2 + 10; ! 466: token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2); ! 467: ! 468: return token_buffer + offset; ! 469: } ! 470: ! 471: /* At the beginning of a line, increment the line number ! 472: and process any #-directive on this line. ! 473: If the line is a #-directive, read the entire line and return a newline. ! 474: Otherwise, return the line's first non-whitespace character. */ ! 475: ! 476: int ! 477: check_newline () ! 478: { ! 479: register int c; ! 480: register int token; ! 481: ! 482: lineno++; ! 483: ! 484: /* Read first nonwhite char on the line. */ ! 485: ! 486: c = getc (finput); ! 487: while (c == ' ' || c == '\t') ! 488: c = getc (finput); ! 489: ! 490: if (c != '#') ! 491: { ! 492: /* If not #, return it so caller will use it. */ ! 493: return c; ! 494: } ! 495: ! 496: /* Read first nonwhite char after the `#'. */ ! 497: ! 498: c = getc (finput); ! 499: while (c == ' ' || c == '\t') ! 500: c = getc (finput); ! 501: ! 502: /* If a letter follows, then if the word here is `line', skip ! 503: it and ignore it; otherwise, ignore the line, with an error ! 504: if the word isn't `pragma', `ident', `define', or `undef'. */ ! 505: ! 506: if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) ! 507: { ! 508: if (c == 'p') ! 509: { ! 510: if (getc (finput) == 'r' ! 511: && getc (finput) == 'a' ! 512: && getc (finput) == 'g' ! 513: && getc (finput) == 'm' ! 514: && getc (finput) == 'a' ! 515: && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) ! 516: { ! 517: #ifdef HANDLE_PRAGMA ! 518: HANDLE_PRAGMA (finput); ! 519: #endif /* HANDLE_PRAGMA */ ! 520: goto skipline; ! 521: } ! 522: } ! 523: ! 524: else if (c == 'd') ! 525: { ! 526: if (getc (finput) == 'e' ! 527: && getc (finput) == 'f' ! 528: && getc (finput) == 'i' ! 529: && getc (finput) == 'n' ! 530: && getc (finput) == 'e' ! 531: && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) ! 532: { ! 533: #ifdef DWARF_DEBUGGING_INFO ! 534: if ((debug_info_level == DINFO_LEVEL_VERBOSE) ! 535: && (write_symbols == DWARF_DEBUG)) ! 536: dwarfout_define (lineno, get_directive_line (finput)); ! 537: #endif /* DWARF_DEBUGGING_INFO */ ! 538: goto skipline; ! 539: } ! 540: } ! 541: else if (c == 'u') ! 542: { ! 543: if (getc (finput) == 'n' ! 544: && getc (finput) == 'd' ! 545: && getc (finput) == 'e' ! 546: && getc (finput) == 'f' ! 547: && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) ! 548: { ! 549: #ifdef DWARF_DEBUGGING_INFO ! 550: if ((debug_info_level == DINFO_LEVEL_VERBOSE) ! 551: && (write_symbols == DWARF_DEBUG)) ! 552: dwarfout_undef (lineno, get_directive_line (finput)); ! 553: #endif /* DWARF_DEBUGGING_INFO */ ! 554: goto skipline; ! 555: } ! 556: } ! 557: else if (c == 'l') ! 558: { ! 559: if (getc (finput) == 'i' ! 560: && getc (finput) == 'n' ! 561: && getc (finput) == 'e' ! 562: && ((c = getc (finput)) == ' ' || c == '\t')) ! 563: goto linenum; ! 564: } ! 565: else if (c == 'i') ! 566: { ! 567: if (getc (finput) == 'd' ! 568: && getc (finput) == 'e' ! 569: && getc (finput) == 'n' ! 570: && getc (finput) == 't' ! 571: && ((c = getc (finput)) == ' ' || c == '\t')) ! 572: { ! 573: /* #ident. The pedantic warning is now in cccp.c. */ ! 574: ! 575: /* Here we have just seen `#ident '. ! 576: A string constant should follow. */ ! 577: ! 578: while (c == ' ' || c == '\t') ! 579: c = getc (finput); ! 580: ! 581: /* If no argument, ignore the line. */ ! 582: if (c == '\n') ! 583: return c; ! 584: ! 585: ungetc (c, finput); ! 586: token = yylex (); ! 587: if (token != STRING ! 588: || TREE_CODE (yylval.ttype) != STRING_CST) ! 589: { ! 590: error ("invalid #ident"); ! 591: goto skipline; ! 592: } ! 593: ! 594: if (!flag_no_ident) ! 595: { ! 596: #ifdef ASM_OUTPUT_IDENT ! 597: ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (yylval.ttype)); ! 598: #endif ! 599: } ! 600: ! 601: /* Skip the rest of this line. */ ! 602: goto skipline; ! 603: } ! 604: } ! 605: ! 606: error ("undefined or invalid # directive"); ! 607: goto skipline; ! 608: } ! 609: ! 610: linenum: ! 611: /* Here we have either `#line' or `# <nonletter>'. ! 612: In either case, it should be a line number; a digit should follow. */ ! 613: ! 614: while (c == ' ' || c == '\t') ! 615: c = getc (finput); ! 616: ! 617: /* If the # is the only nonwhite char on the line, ! 618: just ignore it. Check the new newline. */ ! 619: if (c == '\n') ! 620: return c; ! 621: ! 622: /* Something follows the #; read a token. */ ! 623: ! 624: ungetc (c, finput); ! 625: token = yylex (); ! 626: ! 627: if (token == CONSTANT ! 628: && TREE_CODE (yylval.ttype) == INTEGER_CST) ! 629: { ! 630: int old_lineno = lineno; ! 631: int used_up = 0; ! 632: /* subtract one, because it is the following line that ! 633: gets the specified number */ ! 634: ! 635: int l = TREE_INT_CST_LOW (yylval.ttype) - 1; ! 636: ! 637: /* Is this the last nonwhite stuff on the line? */ ! 638: c = getc (finput); ! 639: while (c == ' ' || c == '\t') ! 640: c = getc (finput); ! 641: if (c == '\n') ! 642: { ! 643: /* No more: store the line number and check following line. */ ! 644: lineno = l; ! 645: return c; ! 646: } ! 647: ungetc (c, finput); ! 648: ! 649: /* More follows: it must be a string constant (filename). */ ! 650: ! 651: /* Read the string constant, but don't treat \ as special. */ ! 652: ignore_escape_flag = 1; ! 653: token = yylex (); ! 654: ignore_escape_flag = 0; ! 655: ! 656: if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST) ! 657: { ! 658: error ("invalid #line"); ! 659: goto skipline; ! 660: } ! 661: ! 662: input_filename ! 663: = (char *) permalloc (TREE_STRING_LENGTH (yylval.ttype) + 1); ! 664: strcpy (input_filename, TREE_STRING_POINTER (yylval.ttype)); ! 665: lineno = l; ! 666: ! 667: /* Each change of file name ! 668: reinitializes whether we are now in a system header. */ ! 669: in_system_header = 0; ! 670: ! 671: if (main_input_filename == 0) ! 672: main_input_filename = input_filename; ! 673: ! 674: /* Is this the last nonwhite stuff on the line? */ ! 675: c = getc (finput); ! 676: while (c == ' ' || c == '\t') ! 677: c = getc (finput); ! 678: if (c == '\n') ! 679: return c; ! 680: ungetc (c, finput); ! 681: ! 682: token = yylex (); ! 683: used_up = 0; ! 684: ! 685: /* `1' after file name means entering new file. ! 686: `2' after file name means just left a file. */ ! 687: ! 688: if (token == CONSTANT ! 689: && TREE_CODE (yylval.ttype) == INTEGER_CST) ! 690: { ! 691: if (TREE_INT_CST_LOW (yylval.ttype) == 1) ! 692: { ! 693: /* Pushing to a new file. */ ! 694: struct file_stack *p ! 695: = (struct file_stack *) xmalloc (sizeof (struct file_stack)); ! 696: input_file_stack->line = old_lineno; ! 697: p->next = input_file_stack; ! 698: p->name = input_filename; ! 699: input_file_stack = p; ! 700: input_file_stack_tick++; ! 701: #ifdef DWARF_DEBUGGING_INFO ! 702: if (debug_info_level == DINFO_LEVEL_VERBOSE ! 703: && write_symbols == DWARF_DEBUG) ! 704: dwarfout_start_new_source_file (input_filename); ! 705: #endif /* DWARF_DEBUGGING_INFO */ ! 706: ! 707: used_up = 1; ! 708: } ! 709: else if (TREE_INT_CST_LOW (yylval.ttype) == 2) ! 710: { ! 711: /* Popping out of a file. */ ! 712: if (input_file_stack->next) ! 713: { ! 714: struct file_stack *p = input_file_stack; ! 715: input_file_stack = p->next; ! 716: free (p); ! 717: input_file_stack_tick++; ! 718: #ifdef DWARF_DEBUGGING_INFO ! 719: if (debug_info_level == DINFO_LEVEL_VERBOSE ! 720: && write_symbols == DWARF_DEBUG) ! 721: dwarfout_resume_previous_source_file (input_file_stack->line); ! 722: #endif /* DWARF_DEBUGGING_INFO */ ! 723: } ! 724: else ! 725: error ("#-lines for entering and leaving files don't match"); ! 726: ! 727: used_up = 1; ! 728: } ! 729: } ! 730: ! 731: /* If we have handled a `1' or a `2', ! 732: see if there is another number to read. */ ! 733: if (used_up) ! 734: { ! 735: /* Is this the last nonwhite stuff on the line? */ ! 736: c = getc (finput); ! 737: while (c == ' ' || c == '\t') ! 738: c = getc (finput); ! 739: if (c == '\n') ! 740: return c; ! 741: ungetc (c, finput); ! 742: ! 743: token = yylex (); ! 744: used_up = 0; ! 745: } ! 746: ! 747: /* `3' after file name means this is a system header file. */ ! 748: ! 749: if (token == CONSTANT ! 750: && TREE_CODE (yylval.ttype) == INTEGER_CST ! 751: && TREE_INT_CST_LOW (yylval.ttype) == 3) ! 752: in_system_header = 1; ! 753: } ! 754: else ! 755: error ("invalid #-line"); ! 756: ! 757: /* skip the rest of this line. */ ! 758: skipline: ! 759: if (c == '\n') ! 760: return c; ! 761: while ((c = getc (finput)) != EOF && c != '\n'); ! 762: return c; ! 763: } ! 764: ! 765: #define isalnum(char) ((char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') || (char >= '0' && char <= '9')) ! 766: #define isdigit(char) (char >= '0' && char <= '9') ! 767: #define ENDFILE -1 /* token that represents end-of-file */ ! 768: ! 769: /* Read an escape sequence, returning its equivalent as a character, ! 770: or -1 if it is backslash-newline. */ ! 771: ! 772: static int ! 773: readescape () ! 774: { ! 775: register int c = getc (finput); ! 776: register int code; ! 777: register unsigned count; ! 778: unsigned firstdig; ! 779: ! 780: switch (c) ! 781: { ! 782: case 'x': ! 783: if (warn_traditional) ! 784: warning ("the meaning of `\\x' varies with -traditional"); ! 785: ! 786: if (flag_traditional) ! 787: return c; ! 788: ! 789: code = 0; ! 790: count = 0; ! 791: while (1) ! 792: { ! 793: c = getc (finput); ! 794: if (!(c >= 'a' && c <= 'f') ! 795: && !(c >= 'A' && c <= 'F') ! 796: && !(c >= '0' && c <= '9')) ! 797: { ! 798: ungetc (c, finput); ! 799: break; ! 800: } ! 801: code *= 16; ! 802: if (c >= 'a' && c <= 'f') ! 803: code += c - 'a' + 10; ! 804: if (c >= 'A' && c <= 'F') ! 805: code += c - 'A' + 10; ! 806: if (c >= '0' && c <= '9') ! 807: code += c - '0'; ! 808: if (count == 0) ! 809: firstdig = code; ! 810: count++; ! 811: } ! 812: if (count == 0) ! 813: error ("\\x used with no following hex digits"); ! 814: else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node) ! 815: || (count > 1 ! 816: && ((1 << (TYPE_PRECISION (integer_type_node) - (count - 1) * 4)) ! 817: <= firstdig))) ! 818: pedwarn ("hex escape out of range"); ! 819: return code; ! 820: ! 821: case '0': case '1': case '2': case '3': case '4': ! 822: case '5': case '6': case '7': ! 823: code = 0; ! 824: count = 0; ! 825: while ((c <= '7') && (c >= '0') && (count++ < 3)) ! 826: { ! 827: code = (code * 8) + (c - '0'); ! 828: c = getc (finput); ! 829: } ! 830: ungetc (c, finput); ! 831: return code; ! 832: ! 833: case '\\': case '\'': case '"': ! 834: return c; ! 835: ! 836: case '\n': ! 837: lineno++; ! 838: return -1; ! 839: ! 840: case 'n': ! 841: return TARGET_NEWLINE; ! 842: ! 843: case 't': ! 844: return TARGET_TAB; ! 845: ! 846: case 'r': ! 847: return TARGET_CR; ! 848: ! 849: case 'f': ! 850: return TARGET_FF; ! 851: ! 852: case 'b': ! 853: return TARGET_BS; ! 854: ! 855: case 'a': ! 856: if (warn_traditional) ! 857: warning ("the meaning of `\\a' varies with -traditional"); ! 858: ! 859: if (flag_traditional) ! 860: return c; ! 861: return TARGET_BELL; ! 862: ! 863: case 'v': ! 864: #if 0 /* Vertical tab is present in common usage compilers. */ ! 865: if (flag_traditional) ! 866: return c; ! 867: #endif ! 868: return TARGET_VT; ! 869: ! 870: case 'E': ! 871: pedwarn ("non-ANSI-standard escape sequence, `\\E'"); ! 872: return 033; ! 873: ! 874: case '?': ! 875: return c; ! 876: ! 877: /* `\(', etc, are used at beginning of line to avoid confusing Emacs. */ ! 878: case '(': ! 879: case '{': ! 880: case '[': ! 881: if (pedantic) ! 882: pedwarn ("non-ANSI escape sequence `\\%c'", c); ! 883: return c; ! 884: } ! 885: if (c >= 040 && c <= 0177) ! 886: pedwarn ("unknown escape sequence `\\%c'", c); ! 887: else ! 888: pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c); ! 889: return c; ! 890: } ! 891: ! 892: void ! 893: yyerror (string) ! 894: char *string; ! 895: { ! 896: char buf[200]; ! 897: ! 898: strcpy (buf, string); ! 899: ! 900: /* We can't print string and character constants well ! 901: because the token_buffer contains the result of processing escapes. */ ! 902: if (end_of_file) ! 903: strcat (buf, " at end of input"); ! 904: else if (token_buffer[0] == 0) ! 905: strcat (buf, " at null character"); ! 906: else if (token_buffer[0] == '"') ! 907: strcat (buf, " before string constant"); ! 908: else if (token_buffer[0] == '\'') ! 909: strcat (buf, " before character constant"); ! 910: else if (token_buffer[0] < 040 || (unsigned char) token_buffer[0] >= 0177) ! 911: sprintf (buf + strlen (buf), " before character 0%o", ! 912: (unsigned char) token_buffer[0]); ! 913: else ! 914: strcat (buf, " before `%s'"); ! 915: ! 916: error (buf, token_buffer); ! 917: } ! 918: ! 919: #if 0 ! 920: ! 921: struct try_type ! 922: { ! 923: tree *node_var; ! 924: char unsigned_flag; ! 925: char long_flag; ! 926: char long_long_flag; ! 927: }; ! 928: ! 929: struct try_type type_sequence[] = ! 930: { ! 931: { &integer_type_node, 0, 0, 0}, ! 932: { &unsigned_type_node, 1, 0, 0}, ! 933: { &long_integer_type_node, 0, 1, 0}, ! 934: { &long_unsigned_type_node, 1, 1, 0}, ! 935: { &long_long_integer_type_node, 0, 1, 1}, ! 936: { &long_long_unsigned_type_node, 1, 1, 1} ! 937: }; ! 938: #endif /* 0 */ ! 939: ! 940: int ! 941: yylex () ! 942: { ! 943: register int c; ! 944: register char *p; ! 945: register int value; ! 946: int wide_flag = 0; ! 947: ! 948: if (nextchar >= 0) ! 949: c = nextchar, nextchar = -1; ! 950: else ! 951: c = getc (finput); ! 952: ! 953: /* Effectively do c = skip_white_space (c) ! 954: but do it faster in the usual cases. */ ! 955: while (1) ! 956: switch (c) ! 957: { ! 958: case '\r': ! 959: if (!flag_traditional) /* ANSI says no */ ! 960: goto found_nonwhite; ! 961: case ' ': ! 962: case '\t': ! 963: case '\f': ! 964: case '\v': ! 965: case '\b': ! 966: c = getc (finput); ! 967: break; ! 968: ! 969: case '\n': ! 970: case '/': ! 971: case '\\': ! 972: c = skip_white_space (c); ! 973: default: ! 974: goto found_nonwhite; ! 975: } ! 976: found_nonwhite: ! 977: ! 978: token_buffer[0] = c; ! 979: token_buffer[1] = 0; ! 980: ! 981: /* yylloc.first_line = lineno; */ ! 982: ! 983: switch (c) ! 984: { ! 985: case EOF: ! 986: end_of_file = 1; ! 987: token_buffer[0] = 0; ! 988: value = ENDFILE; ! 989: break; ! 990: ! 991: case '$': ! 992: if (dollars_in_ident) ! 993: goto letter; ! 994: return '$'; ! 995: ! 996: case 'L': ! 997: /* Capital L may start a wide-string or wide-character constant. */ ! 998: { ! 999: register int c = getc (finput); ! 1000: if (c == '\'') ! 1001: { ! 1002: wide_flag = 1; ! 1003: goto char_constant; ! 1004: } ! 1005: if (c == '"') ! 1006: { ! 1007: wide_flag = 1; ! 1008: goto string_constant; ! 1009: } ! 1010: ungetc (c, finput); ! 1011: } ! 1012: goto letter; ! 1013: ! 1014: case '@': ! 1015: if (!doing_objc_thang) ! 1016: { ! 1017: value = c; ! 1018: break; ! 1019: } ! 1020: p = token_buffer; ! 1021: *p++ = '@'; ! 1022: c = getc (finput); ! 1023: while (isalnum (c) || c == '_') ! 1024: { ! 1025: if (p >= token_buffer + maxtoken) ! 1026: p = extend_token_buffer (p); ! 1027: ! 1028: *p++ = c; ! 1029: c = getc (finput); ! 1030: } ! 1031: ! 1032: *p = 0; ! 1033: nextchar = c; ! 1034: value = recognize_objc_keyword (token_buffer + 1); ! 1035: if (value != 0) ! 1036: break; ! 1037: error ("invalid Objective C keyword `%s'", token_buffer); ! 1038: /* Cause a syntax error--1 is not a valid token type. */ ! 1039: value = 1; ! 1040: break; ! 1041: ! 1042: case 'A': case 'B': case 'C': case 'D': case 'E': ! 1043: case 'F': case 'G': case 'H': case 'I': case 'J': ! 1044: case 'K': case 'M': case 'N': case 'O': ! 1045: case 'P': case 'Q': case 'R': case 'S': case 'T': ! 1046: case 'U': case 'V': case 'W': case 'X': case 'Y': ! 1047: case 'Z': ! 1048: case 'a': case 'b': case 'c': case 'd': case 'e': ! 1049: case 'f': case 'g': case 'h': case 'i': case 'j': ! 1050: case 'k': case 'l': case 'm': case 'n': case 'o': ! 1051: case 'p': case 'q': case 'r': case 's': case 't': ! 1052: case 'u': case 'v': case 'w': case 'x': case 'y': ! 1053: case 'z': ! 1054: case '_': ! 1055: letter: ! 1056: p = token_buffer; ! 1057: while (isalnum (c) || c == '_' || c == '$' || c == '@') ! 1058: { ! 1059: if (p >= token_buffer + maxtoken) ! 1060: p = extend_token_buffer (p); ! 1061: if (c == '$' && ! dollars_in_ident) ! 1062: break; ! 1063: ! 1064: *p++ = c; ! 1065: c = getc (finput); ! 1066: } ! 1067: ! 1068: *p = 0; ! 1069: nextchar = c; ! 1070: ! 1071: value = IDENTIFIER; ! 1072: yylval.itype = 0; ! 1073: ! 1074: /* Try to recognize a keyword. Uses minimum-perfect hash function */ ! 1075: ! 1076: { ! 1077: register struct resword *ptr; ! 1078: ! 1079: if (ptr = is_reserved_word (token_buffer, p - token_buffer)) ! 1080: { ! 1081: if (ptr->rid) ! 1082: yylval.ttype = ridpointers[(int) ptr->rid]; ! 1083: value = (int) ptr->token; ! 1084: ! 1085: /* Even if we decided to recognize asm, still perhaps warn. */ ! 1086: if (pedantic ! 1087: && (value == ASM || value == TYPEOF ! 1088: || ptr->rid == RID_INLINE) ! 1089: && token_buffer[0] != '_') ! 1090: pedwarn ("ANSI does not permit the keyword `%s'", ! 1091: token_buffer); ! 1092: } ! 1093: } ! 1094: ! 1095: /* If we did not find a keyword, look for an identifier ! 1096: (or a typename). */ ! 1097: ! 1098: if (value == IDENTIFIER) ! 1099: { ! 1100: yylval.ttype = get_identifier (token_buffer); ! 1101: lastiddecl = lookup_name (yylval.ttype); ! 1102: ! 1103: if (lastiddecl != 0 && TREE_CODE (lastiddecl) == TYPE_DECL) ! 1104: value = TYPENAME; ! 1105: else if (doing_objc_thang) ! 1106: { ! 1107: tree objc_interface_decl = lookup_interface (yylval.ttype); ! 1108: ! 1109: if (objc_interface_decl) ! 1110: { ! 1111: value = CLASSNAME; ! 1112: yylval.ttype = objc_interface_decl; ! 1113: } ! 1114: } ! 1115: } ! 1116: ! 1117: break; ! 1118: ! 1119: case '0': case '1': case '2': case '3': case '4': ! 1120: case '5': case '6': case '7': case '8': case '9': ! 1121: case '.': ! 1122: { ! 1123: int base = 10; ! 1124: int count = 0; ! 1125: int largest_digit = 0; ! 1126: int numdigits = 0; ! 1127: /* for multi-precision arithmetic, ! 1128: we store only 8 live bits in each short, ! 1129: giving us 64 bits of reliable precision */ ! 1130: short shorts[8]; ! 1131: int overflow = 0; ! 1132: ! 1133: enum anon1 { NOT_FLOAT, AFTER_POINT, TOO_MANY_POINTS} floatflag ! 1134: = NOT_FLOAT; ! 1135: ! 1136: for (count = 0; count < 8; count++) ! 1137: shorts[count] = 0; ! 1138: ! 1139: p = token_buffer; ! 1140: *p++ = c; ! 1141: ! 1142: if (c == '0') ! 1143: { ! 1144: *p++ = (c = getc (finput)); ! 1145: if ((c == 'x') || (c == 'X')) ! 1146: { ! 1147: base = 16; ! 1148: *p++ = (c = getc (finput)); ! 1149: } ! 1150: /* Leading 0 forces octal unless the 0 is the only digit. */ ! 1151: else if (c >= '0' && c <= '9') ! 1152: { ! 1153: base = 8; ! 1154: numdigits++; ! 1155: } ! 1156: else ! 1157: numdigits++; ! 1158: } ! 1159: ! 1160: /* Read all the digits-and-decimal-points. */ ! 1161: ! 1162: while (c == '.' ! 1163: || (isalnum (c) && (c != 'l') && (c != 'L') ! 1164: && (c != 'u') && (c != 'U') ! 1165: && (floatflag == NOT_FLOAT || ((c != 'f') && (c != 'F'))))) ! 1166: { ! 1167: if (c == '.') ! 1168: { ! 1169: if (base == 16) ! 1170: error ("floating constant may not be in radix 16"); ! 1171: if (floatflag == AFTER_POINT) ! 1172: { ! 1173: error ("malformed floating constant"); ! 1174: floatflag = TOO_MANY_POINTS; ! 1175: } ! 1176: else ! 1177: floatflag = AFTER_POINT; ! 1178: ! 1179: base = 10; ! 1180: *p++ = c = getc (finput); ! 1181: /* Accept '.' as the start of a floating-point number ! 1182: only when it is followed by a digit. ! 1183: Otherwise, unread the following non-digit ! 1184: and use the '.' as a structural token. */ ! 1185: if (p == token_buffer + 2 && !isdigit (c)) ! 1186: { ! 1187: if (c == '.') ! 1188: { ! 1189: c = getc (finput); ! 1190: if (c == '.') ! 1191: { ! 1192: *p++ = c; ! 1193: *p = 0; ! 1194: return ELLIPSIS; ! 1195: } ! 1196: error ("parse error at `..'"); ! 1197: } ! 1198: ungetc (c, finput); ! 1199: token_buffer[1] = 0; ! 1200: value = '.'; ! 1201: goto done; ! 1202: } ! 1203: } ! 1204: else ! 1205: { ! 1206: /* It is not a decimal point. ! 1207: It should be a digit (perhaps a hex digit). */ ! 1208: ! 1209: if (isdigit (c)) ! 1210: { ! 1211: c = c - '0'; ! 1212: } ! 1213: else if (base <= 10) ! 1214: { ! 1215: if ((c&~040) == 'E') ! 1216: { ! 1217: base = 10; ! 1218: floatflag = AFTER_POINT; ! 1219: break; /* start of exponent */ ! 1220: } ! 1221: error ("nondigits in number and not hexadecimal"); ! 1222: c = 0; ! 1223: } ! 1224: else if (c >= 'a') ! 1225: { ! 1226: c = c - 'a' + 10; ! 1227: } ! 1228: else ! 1229: { ! 1230: c = c - 'A' + 10; ! 1231: } ! 1232: if (c >= largest_digit) ! 1233: largest_digit = c; ! 1234: numdigits++; ! 1235: ! 1236: for (count = 0; count < 8; count++) ! 1237: { ! 1238: shorts[count] *= base; ! 1239: if (count) ! 1240: { ! 1241: shorts[count] += (shorts[count-1] >> 8); ! 1242: shorts[count-1] &= (1<<8)-1; ! 1243: } ! 1244: else shorts[0] += c; ! 1245: } ! 1246: ! 1247: if (shorts[7] >= 1<<8 ! 1248: || shorts[7] < - (1 << 8)) ! 1249: overflow = TRUE; ! 1250: ! 1251: if (p >= token_buffer + maxtoken - 3) ! 1252: p = extend_token_buffer (p); ! 1253: *p++ = (c = getc (finput)); ! 1254: } ! 1255: } ! 1256: ! 1257: if (numdigits == 0) ! 1258: error ("numeric constant with no digits"); ! 1259: ! 1260: if (largest_digit >= base) ! 1261: error ("numeric constant contains digits beyond the radix"); ! 1262: ! 1263: /* Remove terminating char from the token buffer and delimit the string */ ! 1264: *--p = 0; ! 1265: ! 1266: if (floatflag != NOT_FLOAT) ! 1267: { ! 1268: tree type = double_type_node; ! 1269: char f_seen = 0; ! 1270: char l_seen = 0; ! 1271: REAL_VALUE_TYPE value; ! 1272: jmp_buf handler; ! 1273: ! 1274: /* Read explicit exponent if any, and put it in tokenbuf. */ ! 1275: ! 1276: if ((c == 'e') || (c == 'E')) ! 1277: { ! 1278: if (p >= token_buffer + maxtoken - 3) ! 1279: p = extend_token_buffer (p); ! 1280: *p++ = c; ! 1281: c = getc (finput); ! 1282: if ((c == '+') || (c == '-')) ! 1283: { ! 1284: *p++ = c; ! 1285: c = getc (finput); ! 1286: } ! 1287: if (! isdigit (c)) ! 1288: error ("floating constant exponent has no digits"); ! 1289: while (isdigit (c)) ! 1290: { ! 1291: if (p >= token_buffer + maxtoken - 3) ! 1292: p = extend_token_buffer (p); ! 1293: *p++ = c; ! 1294: c = getc (finput); ! 1295: } ! 1296: } ! 1297: ! 1298: *p = 0; ! 1299: errno = 0; ! 1300: ! 1301: /* Convert string to a double, checking for overflow. */ ! 1302: if (setjmp (handler)) ! 1303: { ! 1304: error ("floating constant out of range"); ! 1305: value = dconst0; ! 1306: } ! 1307: else ! 1308: { ! 1309: set_float_handler (handler); ! 1310: value = REAL_VALUE_ATOF (token_buffer); ! 1311: set_float_handler (0); ! 1312: } ! 1313: #ifdef ERANGE ! 1314: if (errno == ERANGE && !flag_traditional) ! 1315: { ! 1316: char *p1 = token_buffer; ! 1317: /* Check for "0.0" and variants; ! 1318: Sunos 4 spuriously returns ERANGE for them. */ ! 1319: while (*p1 == '0') p1++; ! 1320: if (*p1 == '.') ! 1321: { ! 1322: p1++; ! 1323: while (*p1 == '0') p1++; ! 1324: } ! 1325: if (*p1 == 'e' || *p1 == 'E') ! 1326: { ! 1327: /* with significand==0, ignore the exponent */ ! 1328: p1++; ! 1329: while (*p1 != 0) p1++; ! 1330: } ! 1331: /* ERANGE is also reported for underflow, ! 1332: so test the value to distinguish overflow from that. */ ! 1333: if (*p1 != 0 && (value > 1.0 || value < -1.0)) ! 1334: warning ("floating point number exceeds range of `double'"); ! 1335: } ! 1336: #endif ! 1337: ! 1338: /* Read the suffixes to choose a data type. */ ! 1339: while (1) ! 1340: { ! 1341: if (c == 'f' || c == 'F') ! 1342: { ! 1343: if (f_seen) ! 1344: error ("two `f's in floating constant"); ! 1345: f_seen = 1; ! 1346: type = float_type_node; ! 1347: value = REAL_VALUE_TRUNCATE (TYPE_MODE (type), value); ! 1348: } ! 1349: else if (c == 'l' || c == 'L') ! 1350: { ! 1351: if (l_seen) ! 1352: error ("two `l's in floating constant"); ! 1353: l_seen = 1; ! 1354: type = long_double_type_node; ! 1355: } ! 1356: else ! 1357: { ! 1358: if (isalnum (c)) ! 1359: { ! 1360: error ("garbage at end of number"); ! 1361: while (isalnum (c)) ! 1362: { ! 1363: if (p >= token_buffer + maxtoken - 3) ! 1364: p = extend_token_buffer (p); ! 1365: *p++ = c; ! 1366: c = getc (finput); ! 1367: } ! 1368: } ! 1369: break; ! 1370: } ! 1371: if (p >= token_buffer + maxtoken - 3) ! 1372: p = extend_token_buffer (p); ! 1373: *p++ = c; ! 1374: c = getc (finput); ! 1375: } ! 1376: ! 1377: /* Create a node with determined type and value. */ ! 1378: yylval.ttype = build_real (type, value); ! 1379: ! 1380: ungetc (c, finput); ! 1381: *p = 0; ! 1382: } ! 1383: else ! 1384: { ! 1385: tree traditional_type, ansi_type, type; ! 1386: int spec_unsigned = 0; ! 1387: int spec_long = 0; ! 1388: int spec_long_long = 0; ! 1389: int bytes, warn, i; ! 1390: ! 1391: while (1) ! 1392: { ! 1393: if (c == 'u' || c == 'U') ! 1394: { ! 1395: if (spec_unsigned) ! 1396: error ("two `u's in integer constant"); ! 1397: spec_unsigned = 1; ! 1398: } ! 1399: else if (c == 'l' || c == 'L') ! 1400: { ! 1401: if (spec_long) ! 1402: { ! 1403: if (spec_long_long) ! 1404: error ("three `l's in integer constant"); ! 1405: else if (pedantic) ! 1406: pedwarn ("ANSI C forbids long long integer constants"); ! 1407: spec_long_long = 1; ! 1408: } ! 1409: spec_long = 1; ! 1410: } ! 1411: else ! 1412: { ! 1413: if (isalnum (c)) ! 1414: { ! 1415: error ("garbage at end of number"); ! 1416: while (isalnum (c)) ! 1417: { ! 1418: if (p >= token_buffer + maxtoken - 3) ! 1419: p = extend_token_buffer (p); ! 1420: *p++ = c; ! 1421: c = getc (finput); ! 1422: } ! 1423: } ! 1424: break; ! 1425: } ! 1426: if (p >= token_buffer + maxtoken - 3) ! 1427: p = extend_token_buffer (p); ! 1428: *p++ = c; ! 1429: c = getc (finput); ! 1430: } ! 1431: ! 1432: ungetc (c, finput); ! 1433: ! 1434: /* If the constant is not long long and it won't fit in an ! 1435: unsigned long, or if the constant is long long and won't fit ! 1436: in an unsigned long long, then warn that the constant is out ! 1437: of range. */ ! 1438: ! 1439: /* ??? This assumes that long long and long integer types are ! 1440: a multiple of 8 bits. This better than the original code ! 1441: though which assumed that long was exactly 32 bits and long ! 1442: long was exactly 64 bits. */ ! 1443: ! 1444: if (spec_long_long) ! 1445: bytes = TYPE_PRECISION (long_long_integer_type_node) / 8; ! 1446: else ! 1447: bytes = TYPE_PRECISION (long_integer_type_node) / 8; ! 1448: ! 1449: if (bytes <= 8) ! 1450: { ! 1451: warn = overflow; ! 1452: for (i = bytes; i < 8; i++) ! 1453: if (shorts[i]) ! 1454: { ! 1455: /* If LL was not used, then clear any excess precision. ! 1456: This is equivalent to the original code, but it is ! 1457: not clear why this is being done. Perhaps to prevent ! 1458: ANSI programs from creating long long constants ! 1459: by accident? */ ! 1460: if (! spec_long_long) ! 1461: shorts[i] = 0; ! 1462: warn = 1; ! 1463: } ! 1464: if (warn) ! 1465: warning ("integer constant out of range"); ! 1466: } ! 1467: else if (overflow) ! 1468: warning ("integer constant larger than compiler can handle"); ! 1469: ! 1470: /* If it overflowed our internal buffer, then make it unsigned. ! 1471: We can't distinguish based on the tree node because ! 1472: any integer constant fits any long long type. */ ! 1473: if (overflow) ! 1474: spec_unsigned = 1; ! 1475: ! 1476: /* This is simplified by the fact that our constant ! 1477: is always positive. */ ! 1478: /* The casts in the following statement should not be ! 1479: needed, but they get around bugs in some C compilers. */ ! 1480: yylval.ttype ! 1481: = (build_int_2 ! 1482: ((((long)shorts[3]<<24) + ((long)shorts[2]<<16) ! 1483: + ((long)shorts[1]<<8) + (long)shorts[0]), ! 1484: (((long)shorts[7]<<24) + ((long)shorts[6]<<16) ! 1485: + ((long)shorts[5]<<8) + (long)shorts[4]))); ! 1486: ! 1487: #if 0 ! 1488: /* Find the first allowable type that the value fits in. */ ! 1489: type = 0; ! 1490: for (i = 0; i < sizeof (type_sequence) / sizeof (type_sequence[0]); ! 1491: i++) ! 1492: if (!(spec_long && !type_sequence[i].long_flag) ! 1493: && !(spec_long_long && !type_sequence[i].long_long_flag) ! 1494: && !(spec_unsigned && !type_sequence[i].unsigned_flag) ! 1495: /* A decimal constant can't be unsigned int ! 1496: unless explicitly specified. */ ! 1497: && !(base == 10 && !spec_unsigned ! 1498: && *type_sequence[i].node_var == unsigned_type_node)) ! 1499: if (int_fits_type_p (yylval.ttype, *type_sequence[i].node_var)) ! 1500: { ! 1501: type = *type_sequence[i].node_var; ! 1502: break; ! 1503: } ! 1504: if (flag_traditional && type == long_unsigned_type_node ! 1505: && !spec_unsigned) ! 1506: type = long_integer_type_node; ! 1507: ! 1508: if (type == 0) ! 1509: { ! 1510: type = long_long_integer_type_node; ! 1511: warning ("integer constant out of range"); ! 1512: } ! 1513: ! 1514: /* Warn about some cases where the type of a given constant ! 1515: changes from traditional C to ANSI C. */ ! 1516: if (warn_traditional) ! 1517: { ! 1518: tree other_type = 0; ! 1519: ! 1520: /* This computation is the same as the previous one ! 1521: except that flag_traditional is used backwards. */ ! 1522: for (i = 0; i < sizeof (type_sequence) / sizeof (type_sequence[0]); ! 1523: i++) ! 1524: if (!(spec_long && !type_sequence[i].long_flag) ! 1525: && !(spec_long_long && !type_sequence[i].long_long_flag) ! 1526: && !(spec_unsigned && !type_sequence[i].unsigned_flag) ! 1527: /* A decimal constant can't be unsigned int ! 1528: unless explicitly specified. */ ! 1529: && !(base == 10 && !spec_unsigned ! 1530: && *type_sequence[i].node_var == unsigned_type_node)) ! 1531: if (int_fits_type_p (yylval.ttype, *type_sequence[i].node_var)) ! 1532: { ! 1533: other_type = *type_sequence[i].node_var; ! 1534: break; ! 1535: } ! 1536: if (!flag_traditional && type == long_unsigned_type_node ! 1537: && !spec_unsigned) ! 1538: type = long_integer_type_node; ! 1539: ! 1540: if (other_type != 0 && other_type != type) ! 1541: { ! 1542: if (flag_traditional) ! 1543: warning ("type of integer constant would be different without -traditional"); ! 1544: else ! 1545: warning ("type of integer constant would be different with -traditional"); ! 1546: } ! 1547: } ! 1548: ! 1549: #else /* 1 */ ! 1550: /* If warn_traditional, calculate both the ANSI type and the ! 1551: traditional type, then see if they disagree. ! 1552: Otherwise, calculate only the type for the dialect in use. */ ! 1553: if (warn_traditional || flag_traditional) ! 1554: { ! 1555: /* Calculate the traditional type. */ ! 1556: /* Traditionally, any constant is signed; ! 1557: but if unsigned is specified explicitly, obey that. ! 1558: Use the smallest size with the right number of bits, ! 1559: except for one special case with decimal constants. */ ! 1560: if (! spec_long && base != 10 ! 1561: && int_fits_type_p (yylval.ttype, unsigned_type_node)) ! 1562: traditional_type = (spec_unsigned ? unsigned_type_node ! 1563: : integer_type_node); ! 1564: /* A decimal constant must be long ! 1565: if it does not fit in type int. ! 1566: I think this is independent of whether ! 1567: the constant is signed. */ ! 1568: else if (! spec_long && base == 10 ! 1569: && int_fits_type_p (yylval.ttype, integer_type_node)) ! 1570: traditional_type = (spec_unsigned ? unsigned_type_node ! 1571: : integer_type_node); ! 1572: else if (! spec_long_long ! 1573: && int_fits_type_p (yylval.ttype, ! 1574: long_unsigned_type_node)) ! 1575: traditional_type = (spec_unsigned ? long_unsigned_type_node ! 1576: : long_integer_type_node); ! 1577: else ! 1578: traditional_type = (spec_unsigned ! 1579: ? long_long_unsigned_type_node ! 1580: : long_long_integer_type_node); ! 1581: } ! 1582: if (warn_traditional || ! flag_traditional) ! 1583: { ! 1584: /* Calculate the ANSI type. */ ! 1585: if (! spec_long && ! spec_unsigned ! 1586: && int_fits_type_p (yylval.ttype, integer_type_node)) ! 1587: ansi_type = integer_type_node; ! 1588: else if (! spec_long && (base != 10 || spec_unsigned) ! 1589: && int_fits_type_p (yylval.ttype, unsigned_type_node)) ! 1590: ansi_type = unsigned_type_node; ! 1591: else if (! spec_unsigned && !spec_long_long ! 1592: && int_fits_type_p (yylval.ttype, long_integer_type_node)) ! 1593: ansi_type = long_integer_type_node; ! 1594: else if (! spec_long_long ! 1595: && int_fits_type_p (yylval.ttype, ! 1596: long_unsigned_type_node)) ! 1597: ansi_type = long_unsigned_type_node; ! 1598: else if (! spec_unsigned ! 1599: && int_fits_type_p (yylval.ttype, ! 1600: long_long_integer_type_node)) ! 1601: ansi_type = long_long_integer_type_node; ! 1602: else ! 1603: ansi_type = long_long_unsigned_type_node; ! 1604: } ! 1605: ! 1606: type = flag_traditional ? traditional_type : ansi_type; ! 1607: ! 1608: if (warn_traditional && traditional_type != ansi_type) ! 1609: { ! 1610: if (TYPE_PRECISION (traditional_type) ! 1611: != TYPE_PRECISION (ansi_type)) ! 1612: warning ("width of integer constant changes with -traditional"); ! 1613: else if (TREE_UNSIGNED (traditional_type) ! 1614: != TREE_UNSIGNED (ansi_type)) ! 1615: warning ("integer constant is unsigned in ANSI C, signed with -traditional"); ! 1616: else abort (); ! 1617: } ! 1618: #endif ! 1619: ! 1620: TREE_TYPE (yylval.ttype) = type; ! 1621: *p = 0; ! 1622: } ! 1623: ! 1624: value = CONSTANT; break; ! 1625: } ! 1626: ! 1627: case '\'': ! 1628: char_constant: ! 1629: { ! 1630: register int result = 0; ! 1631: register num_chars = 0; ! 1632: unsigned width = TYPE_PRECISION (char_type_node); ! 1633: int max_chars; ! 1634: ! 1635: if (wide_flag) ! 1636: { ! 1637: width = WCHAR_TYPE_SIZE; ! 1638: #ifdef MULTIBYTE_CHARS ! 1639: max_chars = MB_CUR_MAX; ! 1640: #else ! 1641: max_chars = 1; ! 1642: #endif ! 1643: } ! 1644: else ! 1645: max_chars = TYPE_PRECISION (integer_type_node) / width; ! 1646: ! 1647: while (1) ! 1648: { ! 1649: tryagain: ! 1650: ! 1651: c = getc (finput); ! 1652: ! 1653: if (c == '\'' || c == EOF) ! 1654: break; ! 1655: ! 1656: if (c == '\\') ! 1657: { ! 1658: c = readescape (); ! 1659: if (c < 0) ! 1660: goto tryagain; ! 1661: if (width < HOST_BITS_PER_INT ! 1662: && (unsigned) c >= (1 << width)) ! 1663: pedwarn ("escape sequence out of range for character"); ! 1664: } ! 1665: else if (c == '\n') ! 1666: { ! 1667: if (pedantic) ! 1668: pedwarn ("ANSI C forbids newline in character constant"); ! 1669: lineno++; ! 1670: } ! 1671: ! 1672: num_chars++; ! 1673: if (num_chars > maxtoken - 4) ! 1674: extend_token_buffer (token_buffer); ! 1675: ! 1676: token_buffer[num_chars] = c; ! 1677: ! 1678: /* Merge character into result; ignore excess chars. */ ! 1679: if (num_chars < max_chars + 1) ! 1680: { ! 1681: if (width < HOST_BITS_PER_INT) ! 1682: result = (result << width) | (c & ((1 << width) - 1)); ! 1683: else ! 1684: result = c; ! 1685: } ! 1686: } ! 1687: ! 1688: token_buffer[num_chars + 1] = '\''; ! 1689: token_buffer[num_chars + 2] = 0; ! 1690: ! 1691: if (c != '\'') ! 1692: error ("malformatted character constant"); ! 1693: else if (num_chars == 0) ! 1694: error ("empty character constant"); ! 1695: else if (num_chars > max_chars) ! 1696: { ! 1697: num_chars = max_chars; ! 1698: error ("character constant too long"); ! 1699: } ! 1700: else if (num_chars != 1 && ! flag_traditional) ! 1701: warning ("multi-character character constant"); ! 1702: ! 1703: /* If char type is signed, sign-extend the constant. */ ! 1704: if (! wide_flag) ! 1705: { ! 1706: int num_bits = num_chars * width; ! 1707: if (TREE_UNSIGNED (char_type_node) ! 1708: || ((result >> (num_bits - 1)) & 1) == 0) ! 1709: yylval.ttype ! 1710: = build_int_2 (result & ((unsigned) ~0 ! 1711: >> (HOST_BITS_PER_INT - num_bits)), ! 1712: 0); ! 1713: else ! 1714: yylval.ttype ! 1715: = build_int_2 (result | ~((unsigned) ~0 ! 1716: >> (HOST_BITS_PER_INT - num_bits)), ! 1717: -1); ! 1718: } ! 1719: else ! 1720: { ! 1721: #ifdef MULTIBYTE_CHARS ! 1722: /* Set the initial shift state and convert the next sequence. */ ! 1723: result = 0; ! 1724: /* In all locales L'\0' is zero and mbtowc will return zero, ! 1725: so don't use it. */ ! 1726: if (num_chars > 1 ! 1727: || (num_chars == 1 && token_buffer[1] != '\0')) ! 1728: { ! 1729: wchar_t wc; ! 1730: (void) mbtowc (NULL, NULL, 0); ! 1731: if (mbtowc (& wc, token_buffer + 1, num_chars) == num_chars) ! 1732: result = wc; ! 1733: else ! 1734: warning ("Ignoring invalid multibyte character"); ! 1735: } ! 1736: #endif ! 1737: yylval.ttype = build_int_2 (result, 0); ! 1738: } ! 1739: ! 1740: TREE_TYPE (yylval.ttype) = integer_type_node; ! 1741: value = CONSTANT; ! 1742: break; ! 1743: } ! 1744: ! 1745: case '"': ! 1746: string_constant: ! 1747: { ! 1748: c = getc (finput); ! 1749: p = token_buffer + 1; ! 1750: ! 1751: while (c != '"' && c >= 0) ! 1752: { ! 1753: /* ignore_escape_flag is set for reading the filename in #line. */ ! 1754: if (!ignore_escape_flag && c == '\\') ! 1755: { ! 1756: c = readescape (); ! 1757: if (c < 0) ! 1758: goto skipnewline; ! 1759: if (!wide_flag && c >= (1 << TYPE_PRECISION (char_type_node))) ! 1760: pedwarn ("escape sequence out of range for character"); ! 1761: } ! 1762: else if (c == '\n') ! 1763: { ! 1764: if (pedantic) ! 1765: pedwarn ("ANSI C forbids newline in string constant"); ! 1766: lineno++; ! 1767: } ! 1768: ! 1769: if (p == token_buffer + maxtoken) ! 1770: p = extend_token_buffer (p); ! 1771: *p++ = c; ! 1772: ! 1773: skipnewline: ! 1774: c = getc (finput); ! 1775: } ! 1776: *p = 0; ! 1777: ! 1778: /* We have read the entire constant. ! 1779: Construct a STRING_CST for the result. */ ! 1780: ! 1781: if (wide_flag) ! 1782: { ! 1783: /* If this is a L"..." wide-string, convert the multibyte string ! 1784: to a wide character string. */ ! 1785: char *widep = (char *) alloca ((p - token_buffer) * WCHAR_BYTES); ! 1786: int len; ! 1787: ! 1788: #ifdef MULTIBYTE_CHARS ! 1789: len = mbstowcs ((wchar_t *) widep, token_buffer + 1, p - token_buffer); ! 1790: if ((unsigned) len >= (p - token_buffer)) ! 1791: { ! 1792: warning ("Ignoring invalid multibyte string"); ! 1793: len = 0; ! 1794: } ! 1795: bzero (widep + (len * WCHAR_BYTES), WCHAR_BYTES); ! 1796: #else ! 1797: { ! 1798: union { long l; char c[sizeof (long)]; } u; ! 1799: int big_endian; ! 1800: char *wp, *cp; ! 1801: ! 1802: /* Determine whether host is little or big endian. */ ! 1803: u.l = 1; ! 1804: big_endian = u.c[sizeof (long) - 1]; ! 1805: wp = widep + (big_endian ? WCHAR_BYTES - 1 : 0); ! 1806: ! 1807: bzero (widep, (p - token_buffer) * WCHAR_BYTES); ! 1808: for (cp = token_buffer + 1; cp < p; cp++) ! 1809: *wp = *cp, wp += WCHAR_BYTES; ! 1810: len = p - token_buffer - 1; ! 1811: } ! 1812: #endif ! 1813: yylval.ttype = build_string ((len + 1) * WCHAR_BYTES, widep); ! 1814: TREE_TYPE (yylval.ttype) = wchar_array_type_node; ! 1815: } ! 1816: else ! 1817: { ! 1818: yylval.ttype = build_string (p - token_buffer, token_buffer + 1); ! 1819: TREE_TYPE (yylval.ttype) = char_array_type_node; ! 1820: } ! 1821: ! 1822: *p++ = '"'; ! 1823: *p = 0; ! 1824: ! 1825: value = STRING; break; ! 1826: } ! 1827: ! 1828: case '+': ! 1829: case '-': ! 1830: case '&': ! 1831: case '|': ! 1832: case '<': ! 1833: case '>': ! 1834: case '*': ! 1835: case '/': ! 1836: case '%': ! 1837: case '^': ! 1838: case '!': ! 1839: case '=': ! 1840: { ! 1841: register int c1; ! 1842: ! 1843: combine: ! 1844: ! 1845: switch (c) ! 1846: { ! 1847: case '+': ! 1848: yylval.code = PLUS_EXPR; break; ! 1849: case '-': ! 1850: yylval.code = MINUS_EXPR; break; ! 1851: case '&': ! 1852: yylval.code = BIT_AND_EXPR; break; ! 1853: case '|': ! 1854: yylval.code = BIT_IOR_EXPR; break; ! 1855: case '*': ! 1856: yylval.code = MULT_EXPR; break; ! 1857: case '/': ! 1858: yylval.code = TRUNC_DIV_EXPR; break; ! 1859: case '%': ! 1860: yylval.code = TRUNC_MOD_EXPR; break; ! 1861: case '^': ! 1862: yylval.code = BIT_XOR_EXPR; break; ! 1863: case LSHIFT: ! 1864: yylval.code = LSHIFT_EXPR; break; ! 1865: case RSHIFT: ! 1866: yylval.code = RSHIFT_EXPR; break; ! 1867: case '<': ! 1868: yylval.code = LT_EXPR; break; ! 1869: case '>': ! 1870: yylval.code = GT_EXPR; break; ! 1871: } ! 1872: ! 1873: token_buffer[1] = c1 = getc (finput); ! 1874: token_buffer[2] = 0; ! 1875: ! 1876: if (c1 == '=') ! 1877: { ! 1878: switch (c) ! 1879: { ! 1880: case '<': ! 1881: value = ARITHCOMPARE; yylval.code = LE_EXPR; goto done; ! 1882: case '>': ! 1883: value = ARITHCOMPARE; yylval.code = GE_EXPR; goto done; ! 1884: case '!': ! 1885: value = EQCOMPARE; yylval.code = NE_EXPR; goto done; ! 1886: case '=': ! 1887: value = EQCOMPARE; yylval.code = EQ_EXPR; goto done; ! 1888: } ! 1889: value = ASSIGN; goto done; ! 1890: } ! 1891: else if (c == c1) ! 1892: switch (c) ! 1893: { ! 1894: case '+': ! 1895: value = PLUSPLUS; goto done; ! 1896: case '-': ! 1897: value = MINUSMINUS; goto done; ! 1898: case '&': ! 1899: value = ANDAND; goto done; ! 1900: case '|': ! 1901: value = OROR; goto done; ! 1902: case '<': ! 1903: c = LSHIFT; ! 1904: goto combine; ! 1905: case '>': ! 1906: c = RSHIFT; ! 1907: goto combine; ! 1908: } ! 1909: else if ((c == '-') && (c1 == '>')) ! 1910: { value = POINTSAT; goto done; } ! 1911: ungetc (c1, finput); ! 1912: token_buffer[1] = 0; ! 1913: ! 1914: if ((c == '<') || (c == '>')) ! 1915: value = ARITHCOMPARE; ! 1916: else value = c; ! 1917: goto done; ! 1918: } ! 1919: ! 1920: case 0: ! 1921: /* Don't make yyparse think this is eof. */ ! 1922: value = 1; ! 1923: break; ! 1924: ! 1925: default: ! 1926: value = c; ! 1927: } ! 1928: ! 1929: done: ! 1930: /* yylloc.last_line = lineno; */ ! 1931: ! 1932: return value; ! 1933: } ! 1934: ! 1935: /* Sets the value of the 'yydebug' varable to VALUE. ! 1936: This is a function so we don't have to have YYDEBUG defined ! 1937: in order to build the compiler. */ ! 1938: ! 1939: void ! 1940: set_yydebug (value) ! 1941: int value; ! 1942: { ! 1943: #if YYDEBUG != 0 ! 1944: yydebug = value; ! 1945: #else ! 1946: warning ("YYDEBUG not defined."); ! 1947: #endif ! 1948: }
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