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flex
1 %{ 2 #include <stdio.h> 3 #include "mycalc.tab.h" 4 5 int yywrap(void) {return 1;} 6 %} 7 8 %% 9 10 "+" return ADD; 11 "-" return SUB; 12 "*" return MUL; 13 "/" return DIV; 14 "(" return LP; 15 ")" return RP; 16 "\n" return CR; 17 ([1-9][0-9]*)|0|([0-9]+\.[0-9]+) { 18 double temp; 19 sscanf(yytext, "%lf", &temp); 20 yylval.double_value = temp; 21 return DOUBLE_LITERAL; 22 } 23 [ \t] ; 24 . { 25 fprintf(stderr, "lexical error.\n"); 26 exit(1); 27 } 28 29 %%
bison
1 %{ 2 #include <stdio.h> 3 #include <stdlib.h> 4 #define YYDEBUG 1 5 %} 6 %union { 7 int int_value; 8 double double_value; 9 } 10 %token <double_value> DOUBLE_LITERAL 11 %token ADD SUB MUL DIV CR LP RP 12 %type <double_value> expression term primary_expression 13 14 %% 15 16 line_list 17 : line 18 | line_list line 19 ; 20 line 21 : expression CR 22 { 23 printf(">>%lf\n", $1); 24 } 25 expression 26 : term 27 | expression ADD term 28 { 29 $$ = $1 + $3; 30 } 31 | expression SUB term 32 { 33 $$ = $1 - $3; 34 } 35 ; 36 term 37 : primary_expression 38 | term MUL primary_expression 39 { 40 $$ = $1 * $3; 41 } 42 | term DIV primary_expression 43 { 44 $$ = $1 / $3; 45 } 46 ; 47 primary_expression 48 : DOUBLE_LITERAL 49 | SUB primary_expression 50 { 51 $$ = -$2; 52 } 53 | LP expression RP 54 { 55 $$ = $2; 56 } 57 ; 58 59 %% 60 61 int yyerror(char const *str) 62 { 63 extern char *yytext; 64 fprintf(stderr, "parser error near %s\n", yytext); 65 return 0; 66 } 67 68 int main() 69 { 70 extern int yyparse(void); 71 extern FILE *yyin; 72 yyin = stdin; 73 if (yyparse()) 74 { 75 fprintf(stderr, "Error ! Error! Error!\n"); 76 exit(1); 77 } 78 return 0; 79 }
bison -dv mycalc.y
flex mycalc.l
cc -o mycalc mycalc.tab.c lex.yy.c
1 /* A Bison parser, made by GNU Bison 3.0.2. */ 2 3 /* Bison interface for Yacc-like parsers in C 4 5 Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation, Inc. 6 7 This program is free software: you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation, either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 /* As a special exception, you may create a larger work that contains 21 part or all of the Bison parser skeleton and distribute that work 22 under terms of your choice, so long as that work isn‘t itself a 23 parser generator using the skeleton or a modified version thereof 24 as a parser skeleton. Alternatively, if you modify or redistribute 25 the parser skeleton itself, you may (at your option) remove this 26 special exception, which will cause the skeleton and the resulting 27 Bison output files to be licensed under the GNU General Public 28 License without this special exception. 29 30 This special exception was added by the Free Software Foundation in 31 version 2.2 of Bison. */ 32 33 #ifndef YY_YY_MYCALC_TAB_H_INCLUDED 34 # define YY_YY_MYCALC_TAB_H_INCLUDED 35 /* Debug traces. */ 36 #ifndef YYDEBUG 37 # define YYDEBUG 0 38 #endif 39 #if YYDEBUG 40 extern int yydebug; 41 #endif 42 43 /* Token type. */ 44 #ifndef YYTOKENTYPE 45 # define YYTOKENTYPE 46 enum yytokentype 47 { 48 DOUBLE_LITERAL = 258, 49 ADD = 259, 50 SUB = 260, 51 MUL = 261, 52 DIV = 262, 53 CR = 263, 54 LP = 264, 55 RP = 265 56 }; 57 #endif 58 59 /* Value type. */ 60 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED 61 typedef union YYSTYPE YYSTYPE; 62 union YYSTYPE 63 { 64 #line 6 "mycalc.y" /* yacc.c:1909 */ 65 66 int int_value; 67 double double_value; 68 69 #line 70 "mycalc.tab.h" /* yacc.c:1909 */ 70 }; 71 # define YYSTYPE_IS_TRIVIAL 1 72 # define YYSTYPE_IS_DECLARED 1 73 #endif 74 75 76 extern YYSTYPE yylval; 77 78 int yyparse (void); 79 80 #endif /* !YY_YY_MYCALC_TAB_H_INCLUDED */
1 /* A Bison parser, made by GNU Bison 3.0.2. */ 2 3 /* Bison implementation for Yacc-like parsers in C 4 5 Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation, Inc. 6 7 This program is free software: you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation, either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 /* As a special exception, you may create a larger work that contains 21 part or all of the Bison parser skeleton and distribute that work 22 under terms of your choice, so long as that work isn‘t itself a 23 parser generator using the skeleton or a modified version thereof 24 as a parser skeleton. Alternatively, if you modify or redistribute 25 the parser skeleton itself, you may (at your option) remove this 26 special exception, which will cause the skeleton and the resulting 27 Bison output files to be licensed under the GNU General Public 28 License without this special exception. 29 30 This special exception was added by the Free Software Foundation in 31 version 2.2 of Bison. */ 32 33 /* C LALR(1) parser skeleton written by Richard Stallman, by 34 simplifying the original so-called "semantic" parser. */ 35 36 /* All symbols defined below should begin with yy or YY, to avoid 37 infringing on user name space. This should be done even for local 38 variables, as they might otherwise be expanded by user macros. 39 There are some unavoidable exceptions within include files to 40 define necessary library symbols; they are noted "INFRINGES ON 41 USER NAME SPACE" below. */ 42 43 /* Identify Bison output. */ 44 #define YYBISON 1 45 46 /* Bison version. */ 47 #define YYBISON_VERSION "3.0.2" 48 49 /* Skeleton name. */ 50 #define YYSKELETON_NAME "yacc.c" 51 52 /* Pure parsers. */ 53 #define YYPURE 0 54 55 /* Push parsers. */ 56 #define YYPUSH 0 57 58 /* Pull parsers. */ 59 #define YYPULL 1 60 61 62 63 64 /* Copy the first part of user declarations. */ 65 #line 1 "mycalc.y" /* yacc.c:339 */ 66 67 #include <stdio.h> 68 #include <stdlib.h> 69 #define YYDEBUG 1 70 71 #line 72 "mycalc.tab.c" /* yacc.c:339 */ 72 73 # ifndef YY_NULLPTR 74 # if defined __cplusplus && 201103L <= __cplusplus 75 # define YY_NULLPTR nullptr 76 # else 77 # define YY_NULLPTR 0 78 # endif 79 # endif 80 81 /* Enabling verbose error messages. */ 82 #ifdef YYERROR_VERBOSE 83 # undef YYERROR_VERBOSE 84 # define YYERROR_VERBOSE 1 85 #else 86 # define YYERROR_VERBOSE 0 87 #endif 88 89 /* In a future release of Bison, this section will be replaced 90 by #include "mycalc.tab.h". */ 91 #ifndef YY_YY_MYCALC_TAB_H_INCLUDED 92 # define YY_YY_MYCALC_TAB_H_INCLUDED 93 /* Debug traces. */ 94 #ifndef YYDEBUG 95 # define YYDEBUG 0 96 #endif 97 #if YYDEBUG 98 extern int yydebug; 99 #endif 100 101 /* Token type. */ 102 #ifndef YYTOKENTYPE 103 # define YYTOKENTYPE 104 enum yytokentype 105 { 106 DOUBLE_LITERAL = 258, 107 ADD = 259, 108 SUB = 260, 109 MUL = 261, 110 DIV = 262, 111 CR = 263, 112 LP = 264, 113 RP = 265 114 }; 115 #endif 116 117 /* Value type. */ 118 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED 119 typedef union YYSTYPE YYSTYPE; 120 union YYSTYPE 121 { 122 #line 6 "mycalc.y" /* yacc.c:355 */ 123 124 int int_value; 125 double double_value; 126 127 #line 128 "mycalc.tab.c" /* yacc.c:355 */ 128 }; 129 # define YYSTYPE_IS_TRIVIAL 1 130 # define YYSTYPE_IS_DECLARED 1 131 #endif 132 133 134 extern YYSTYPE yylval; 135 136 int yyparse (void); 137 138 #endif /* !YY_YY_MYCALC_TAB_H_INCLUDED */ 139 140 /* Copy the second part of user declarations. */ 141 142 #line 143 "mycalc.tab.c" /* yacc.c:358 */ 143 144 #ifdef short 145 # undef short 146 #endif 147 148 #ifdef YYTYPE_UINT8 149 typedef YYTYPE_UINT8 yytype_uint8; 150 #else 151 typedef unsigned char yytype_uint8; 152 #endif 153 154 #ifdef YYTYPE_INT8 155 typedef YYTYPE_INT8 yytype_int8; 156 #else 157 typedef signed char yytype_int8; 158 #endif 159 160 #ifdef YYTYPE_UINT16 161 typedef YYTYPE_UINT16 yytype_uint16; 162 #else 163 typedef unsigned short int yytype_uint16; 164 #endif 165 166 #ifdef YYTYPE_INT16 167 typedef YYTYPE_INT16 yytype_int16; 168 #else 169 typedef short int yytype_int16; 170 #endif 171 172 #ifndef YYSIZE_T 173 # ifdef __SIZE_TYPE__ 174 # define YYSIZE_T __SIZE_TYPE__ 175 # elif defined size_t 176 # define YYSIZE_T size_t 177 # elif ! defined YYSIZE_T 178 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */ 179 # define YYSIZE_T size_t 180 # else 181 # define YYSIZE_T unsigned int 182 # endif 183 #endif 184 185 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1) 186 187 #ifndef YY_ 188 # if defined YYENABLE_NLS && YYENABLE_NLS 189 # if ENABLE_NLS 190 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */ 191 # define YY_(Msgid) dgettext ("bison-runtime", Msgid) 192 # endif 193 # endif 194 # ifndef YY_ 195 # define YY_(Msgid) Msgid 196 # endif 197 #endif 198 199 #ifndef YY_ATTRIBUTE 200 # if (defined __GNUC__ 201 && (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__))) 202 || defined __SUNPRO_C && 0x5110 <= __SUNPRO_C 203 # define YY_ATTRIBUTE(Spec) __attribute__(Spec) 204 # else 205 # define YY_ATTRIBUTE(Spec) /* empty */ 206 # endif 207 #endif 208 209 #ifndef YY_ATTRIBUTE_PURE 210 # define YY_ATTRIBUTE_PURE YY_ATTRIBUTE ((__pure__)) 211 #endif 212 213 #ifndef YY_ATTRIBUTE_UNUSED 214 # define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__)) 215 #endif 216 217 #if !defined _Noreturn 218 && (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112) 219 # if defined _MSC_VER && 1200 <= _MSC_VER 220 # define _Noreturn __declspec (noreturn) 221 # else 222 # define _Noreturn YY_ATTRIBUTE ((__noreturn__)) 223 # endif 224 #endif 225 226 /* Suppress unused-variable warnings by "using" E. */ 227 #if ! defined lint || defined __GNUC__ 228 # define YYUSE(E) ((void) (E)) 229 #else 230 # define YYUSE(E) /* empty */ 231 #endif 232 233 #if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__ 234 /* Suppress an incorrect diagnostic about yylval being uninitialized. */ 235 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 236 _Pragma ("GCC diagnostic push") 237 _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"") 238 _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"") 239 # define YY_IGNORE_MAYBE_UNINITIALIZED_END 240 _Pragma ("GCC diagnostic pop") 241 #else 242 # define YY_INITIAL_VALUE(Value) Value 243 #endif 244 #ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 245 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 246 # define YY_IGNORE_MAYBE_UNINITIALIZED_END 247 #endif 248 #ifndef YY_INITIAL_VALUE 249 # define YY_INITIAL_VALUE(Value) /* Nothing. */ 250 #endif 251 252 253 #if ! defined yyoverflow || YYERROR_VERBOSE 254 255 /* The parser invokes alloca or malloc; define the necessary symbols. */ 256 257 # ifdef YYSTACK_USE_ALLOCA 258 # if YYSTACK_USE_ALLOCA 259 # ifdef __GNUC__ 260 # define YYSTACK_ALLOC __builtin_alloca 261 # elif defined __BUILTIN_VA_ARG_INCR 262 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */ 263 # elif defined _AIX 264 # define YYSTACK_ALLOC __alloca 265 # elif defined _MSC_VER 266 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */ 267 # define alloca _alloca 268 # else 269 # define YYSTACK_ALLOC alloca 270 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS 271 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */ 272 /* Use EXIT_SUCCESS as a witness for stdlib.h. */ 273 # ifndef EXIT_SUCCESS 274 # define EXIT_SUCCESS 0 275 # endif 276 # endif 277 # endif 278 # endif 279 # endif 280 281 # ifdef YYSTACK_ALLOC 282 /* Pacify GCC‘s ‘empty if-body‘ warning. */ 283 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (0) 284 # ifndef YYSTACK_ALLOC_MAXIMUM 285 /* The OS might guarantee only one guard page at the bottom of the stack, 286 and a page size can be as small as 4096 bytes. So we cannot safely 287 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number 288 to allow for a few compiler-allocated temporary stack slots. */ 289 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */ 290 # endif 291 # else 292 # define YYSTACK_ALLOC YYMALLOC 293 # define YYSTACK_FREE YYFREE 294 # ifndef YYSTACK_ALLOC_MAXIMUM 295 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM 296 # endif 297 # if (defined __cplusplus && ! defined EXIT_SUCCESS 298 && ! ((defined YYMALLOC || defined malloc) 299 && (defined YYFREE || defined free))) 300 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */ 301 # ifndef EXIT_SUCCESS 302 # define EXIT_SUCCESS 0 303 # endif 304 # endif 305 # ifndef YYMALLOC 306 # define YYMALLOC malloc 307 # if ! defined malloc && ! defined EXIT_SUCCESS 308 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */ 309 # endif 310 # endif 311 # ifndef YYFREE 312 # define YYFREE free 313 # if ! defined free && ! defined EXIT_SUCCESS 314 void free (void *); /* INFRINGES ON USER NAME SPACE */ 315 # endif 316 # endif 317 # endif 318 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */ 319 320 321 #if (! defined yyoverflow 322 && (! defined __cplusplus 323 || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))) 324 325 /* A type that is properly aligned for any stack member. */ 326 union yyalloc 327 { 328 yytype_int16 yyss_alloc; 329 YYSTYPE yyvs_alloc; 330 }; 331 332 /* The size of the maximum gap between one aligned stack and the next. */ 333 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1) 334 335 /* The size of an array large to enough to hold all stacks, each with 336 N elements. */ 337 # define YYSTACK_BYTES(N) 338 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) 339 + YYSTACK_GAP_MAXIMUM) 340 341 # define YYCOPY_NEEDED 1 342 343 /* Relocate STACK from its old location to the new one. The 344 local variables YYSIZE and YYSTACKSIZE give the old and new number of 345 elements in the stack, and YYPTR gives the new location of the 346 stack. Advance YYPTR to a properly aligned location for the next 347 stack. */ 348 # define YYSTACK_RELOCATE(Stack_alloc, Stack) 349 do 350 { 351 YYSIZE_T yynewbytes; 352 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); 353 Stack = &yyptr->Stack_alloc; 354 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; 355 yyptr += yynewbytes / sizeof (*yyptr); 356 } 357 while (0) 358 359 #endif 360 361 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED 362 /* Copy COUNT objects from SRC to DST. The source and destination do 363 not overlap. */ 364 # ifndef YYCOPY 365 # if defined __GNUC__ && 1 < __GNUC__ 366 # define YYCOPY(Dst, Src, Count) 367 __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src))) 368 # else 369 # define YYCOPY(Dst, Src, Count) 370 do 371 { 372 YYSIZE_T yyi; 373 for (yyi = 0; yyi < (Count); yyi++) 374 (Dst)[yyi] = (Src)[yyi]; 375 } 376 while (0) 377 # endif 378 # endif 379 #endif /* !YYCOPY_NEEDED */ 380 381 /* YYFINAL -- State number of the termination state. */ 382 #define YYFINAL 11 383 /* YYLAST -- Last index in YYTABLE. */ 384 #define YYLAST 22 385 386 /* YYNTOKENS -- Number of terminals. */ 387 #define YYNTOKENS 11 388 /* YYNNTS -- Number of nonterminals. */ 389 #define YYNNTS 6 390 /* YYNRULES -- Number of rules. */ 391 #define YYNRULES 13 392 /* YYNSTATES -- Number of states. */ 393 #define YYNSTATES 23 394 395 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned 396 by yylex, with out-of-bounds checking. */ 397 #define YYUNDEFTOK 2 398 #define YYMAXUTOK 265 399 400 #define YYTRANSLATE(YYX) 401 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) 402 403 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM 404 as returned by yylex, without out-of-bounds checking. */ 405 static const yytype_uint8 yytranslate[] = 406 { 407 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 408 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 409 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 410 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 411 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 412 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 413 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 414 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 415 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 416 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 417 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 418 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 419 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 420 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 421 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 422 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 423 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 424 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 425 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 426 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 427 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 428 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 429 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 430 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 431 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 432 2, 2, 2, 2, 2, 2, 1, 2, 3, 4, 433 5, 6, 7, 8, 9, 10 434 }; 435 436 #if YYDEBUG 437 /* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ 438 static const yytype_uint8 yyrline[] = 439 { 440 0, 17, 17, 18, 21, 26, 27, 31, 37, 38, 441 42, 48, 49, 53 442 }; 443 #endif 444 445 #if YYDEBUG || YYERROR_VERBOSE || 0 446 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. 447 First, the terminals, then, starting at YYNTOKENS, nonterminals. */ 448 static const char *const yytname[] = 449 { 450 "$end", "error", "$undefined", "DOUBLE_LITERAL", "ADD", "SUB", "MUL", 451 "DIV", "CR", "LP", "RP", "$accept", "line_list", "line", "expression", 452 "term", "primary_expression", YY_NULLPTR 453 }; 454 #endif 455 456 # ifdef YYPRINT 457 /* YYTOKNUM[NUM] -- (External) token number corresponding to the 458 (internal) symbol number NUM (which must be that of a token). */ 459 static const yytype_uint16 yytoknum[] = 460 { 461 0, 256, 257, 258, 259, 260, 261, 262, 263, 264, 462 265 463 }; 464 # endif 465 466 #define YYPACT_NINF -3 467 468 #define yypact_value_is_default(Yystate) 469 (!!((Yystate) == (-3))) 470 471 #define YYTABLE_NINF -1 472 473 #define yytable_value_is_error(Yytable_value) 474 0 475 476 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing 477 STATE-NUM. */ 478 static const yytype_int8 yypact[] = 479 { 480 0, -3, 0, 0, 1, -3, 12, 5, -3, -3, 481 3, -3, -3, 0, 0, -3, 0, 0, -3, 5, 482 5, -3, -3 483 }; 484 485 /* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM. 486 Performed when YYTABLE does not specify something else to do. Zero 487 means the default is an error. */ 488 static const yytype_uint8 yydefact[] = 489 { 490 0, 11, 0, 0, 0, 2, 0, 5, 8, 12, 491 0, 1, 3, 0, 0, 4, 0, 0, 13, 6, 492 7, 9, 10 493 }; 494 495 /* YYPGOTO[NTERM-NUM]. */ 496 static const yytype_int8 yypgoto[] = 497 { 498 -3, -3, 14, -1, 8, -2 499 }; 500 501 /* YYDEFGOTO[NTERM-NUM]. */ 502 static const yytype_int8 yydefgoto[] = 503 { 504 -1, 4, 5, 6, 7, 8 505 }; 506 507 /* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM. If 508 positive, shift that token. If negative, reduce the rule whose 509 number is the opposite. If YYTABLE_NINF, syntax error. */ 510 static const yytype_uint8 yytable[] = 511 { 512 9, 11, 10, 1, 1, 2, 2, 13, 14, 3, 513 3, 16, 17, 18, 21, 22, 13, 14, 12, 0, 514 15, 19, 20 515 }; 516 517 static const yytype_int8 yycheck[] = 518 { 519 2, 0, 3, 3, 3, 5, 5, 4, 5, 9, 520 9, 6, 7, 10, 16, 17, 4, 5, 4, -1, 521 8, 13, 14 522 }; 523 524 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing 525 symbol of state STATE-NUM. */ 526 static const yytype_uint8 yystos[] = 527 { 528 0, 3, 5, 9, 12, 13, 14, 15, 16, 16, 529 14, 0, 13, 4, 5, 8, 6, 7, 10, 15, 530 15, 16, 16 531 }; 532 533 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ 534 static const yytype_uint8 yyr1[] = 535 { 536 0, 11, 12, 12, 13, 14, 14, 14, 15, 15, 537 15, 16, 16, 16 538 }; 539 540 /* YYR2[YYN] -- Number of symbols on the right hand side of rule YYN. */ 541 static const yytype_uint8 yyr2[] = 542 { 543 0, 2, 1, 2, 2, 1, 3, 3, 1, 3, 544 3, 1, 2, 3 545 }; 546 547 548 #define yyerrok (yyerrstatus = 0) 549 #define yyclearin (yychar = YYEMPTY) 550 #define YYEMPTY (-2) 551 #define YYEOF 0 552 553 #define YYACCEPT goto yyacceptlab 554 #define YYABORT goto yyabortlab 555 #define YYERROR goto yyerrorlab 556 557 558 #define YYRECOVERING() (!!yyerrstatus) 559 560 #define YYBACKUP(Token, Value) 561 do 562 if (yychar == YYEMPTY) 563 { 564 yychar = (Token); 565 yylval = (Value); 566 YYPOPSTACK (yylen); 567 yystate = *yyssp; 568 goto yybackup; 569 } 570 else 571 { 572 yyerror (YY_("syntax error: cannot back up")); 573 YYERROR; 574 } 575 while (0) 576 577 /* Error token number */ 578 #define YYTERROR 1 579 #define YYERRCODE 256 580 581 582 583 /* Enable debugging if requested. */ 584 #if YYDEBUG 585 586 # ifndef YYFPRINTF 587 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */ 588 # define YYFPRINTF fprintf 589 # endif 590 591 # define YYDPRINTF(Args) 592 do { 593 if (yydebug) 594 YYFPRINTF Args; 595 } while (0) 596 597 /* This macro is provided for backward compatibility. */ 598 #ifndef YY_LOCATION_PRINT 599 # define YY_LOCATION_PRINT(File, Loc) ((void) 0) 600 #endif 601 602 603 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) 604 do { 605 if (yydebug) 606 { 607 YYFPRINTF (stderr, "%s ", Title); 608 yy_symbol_print (stderr, 609 Type, Value); 610 YYFPRINTF (stderr, "\n"); 611 } 612 } while (0) 613 614 615 /*----------------------------------------. 616 | Print this symbol‘s value on YYOUTPUT. | 617 `----------------------------------------*/ 618 619 static void 620 yy_symbol_value_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep) 621 { 622 FILE *yyo = yyoutput; 623 YYUSE (yyo); 624 if (!yyvaluep) 625 return; 626 # ifdef YYPRINT 627 if (yytype < YYNTOKENS) 628 YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); 629 # endif 630 YYUSE (yytype); 631 } 632 633 634 /*--------------------------------. 635 | Print this symbol on YYOUTPUT. | 636 `--------------------------------*/ 637 638 static void 639 yy_symbol_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep) 640 { 641 YYFPRINTF (yyoutput, "%s %s (", 642 yytype < YYNTOKENS ? "token" : "nterm", yytname[yytype]); 643 644 yy_symbol_value_print (yyoutput, yytype, yyvaluep); 645 YYFPRINTF (yyoutput, ")"); 646 } 647 648 /*------------------------------------------------------------------. 649 | yy_stack_print -- Print the state stack from its BOTTOM up to its | 650 | TOP (included). | 651 `------------------------------------------------------------------*/ 652 653 static void 654 yy_stack_print (yytype_int16 *yybottom, yytype_int16 *yytop) 655 { 656 YYFPRINTF (stderr, "Stack now"); 657 for (; yybottom <= yytop; yybottom++) 658 { 659 int yybot = *yybottom; 660 YYFPRINTF (stderr, " %d", yybot); 661 } 662 YYFPRINTF (stderr, "\n"); 663 } 664 665 # define YY_STACK_PRINT(Bottom, Top) 666 do { 667 if (yydebug) 668 yy_stack_print ((Bottom), (Top)); 669 } while (0) 670 671 672 /*------------------------------------------------. 673 | Report that the YYRULE is going to be reduced. | 674 `------------------------------------------------*/ 675 676 static void 677 yy_reduce_print (yytype_int16 *yyssp, YYSTYPE *yyvsp, int yyrule) 678 { 679 unsigned long int yylno = yyrline[yyrule]; 680 int yynrhs = yyr2[yyrule]; 681 int yyi; 682 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n", 683 yyrule - 1, yylno); 684 /* The symbols being reduced. */ 685 for (yyi = 0; yyi < yynrhs; yyi++) 686 { 687 YYFPRINTF (stderr, " $%d = ", yyi + 1); 688 yy_symbol_print (stderr, 689 yystos[yyssp[yyi + 1 - yynrhs]], 690 &(yyvsp[(yyi + 1) - (yynrhs)]) 691 ); 692 YYFPRINTF (stderr, "\n"); 693 } 694 } 695 696 # define YY_REDUCE_PRINT(Rule) 697 do { 698 if (yydebug) 699 yy_reduce_print (yyssp, yyvsp, Rule); 700 } while (0) 701 702 /* Nonzero means print parse trace. It is left uninitialized so that 703 multiple parsers can coexist. */ 704 int yydebug; 705 #else /* !YYDEBUG */ 706 # define YYDPRINTF(Args) 707 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) 708 # define YY_STACK_PRINT(Bottom, Top) 709 # define YY_REDUCE_PRINT(Rule) 710 #endif /* !YYDEBUG */ 711 712 713 /* YYINITDEPTH -- initial size of the parser‘s stacks. */ 714 #ifndef YYINITDEPTH 715 # define YYINITDEPTH 200 716 #endif 717 718 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only 719 if the built-in stack extension method is used). 720 721 Do not make this value too large; the results are undefined if 722 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH) 723 evaluated with infinite-precision integer arithmetic. */ 724 725 #ifndef YYMAXDEPTH 726 # define YYMAXDEPTH 10000 727 #endif 728 729 730 #if YYERROR_VERBOSE 731 732 # ifndef yystrlen 733 # if defined __GLIBC__ && defined _STRING_H 734 # define yystrlen strlen 735 # else 736 /* Return the length of YYSTR. */ 737 static YYSIZE_T 738 yystrlen (const char *yystr) 739 { 740 YYSIZE_T yylen; 741 for (yylen = 0; yystr[yylen]; yylen++) 742 continue; 743 return yylen; 744 } 745 # endif 746 # endif 747 748 # ifndef yystpcpy 749 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE 750 # define yystpcpy stpcpy 751 # else 752 /* Copy YYSRC to YYDEST, returning the address of the terminating ‘\0‘ in 753 YYDEST. */ 754 static char * 755 yystpcpy (char *yydest, const char *yysrc) 756 { 757 char *yyd = yydest; 758 const char *yys = yysrc; 759 760 while ((*yyd++ = *yys++) != ‘\0‘) 761 continue; 762 763 return yyd - 1; 764 } 765 # endif 766 # endif 767 768 # ifndef yytnamerr 769 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary 770 quotes and backslashes, so that it‘s suitable for yyerror. The 771 heuristic is that double-quoting is unnecessary unless the string 772 contains an apostrophe, a comma, or backslash (other than 773 backslash-backslash). YYSTR is taken from yytname. If YYRES is 774 null, do not copy; instead, return the length of what the result 775 would have been. */ 776 static YYSIZE_T 777 yytnamerr (char *yyres, const char *yystr) 778 { 779 if (*yystr == ‘"‘) 780 { 781 YYSIZE_T yyn = 0; 782 char const *yyp = yystr; 783 784 for (;;) 785 switch (*++yyp) 786 { 787 case ‘\‘‘: 788 case ‘,‘: 789 goto do_not_strip_quotes; 790 791 case ‘\\‘: 792 if (*++yyp != ‘\\‘) 793 goto do_not_strip_quotes; 794 /* Fall through. */ 795 default: 796 if (yyres) 797 yyres[yyn] = *yyp; 798 yyn++; 799 break; 800 801 case ‘"‘: 802 if (yyres) 803 yyres[yyn] = ‘\0‘; 804 return yyn; 805 } 806 do_not_strip_quotes: ; 807 } 808 809 if (! yyres) 810 return yystrlen (yystr); 811 812 return yystpcpy (yyres, yystr) - yyres; 813 } 814 # endif 815 816 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message 817 about the unexpected token YYTOKEN for the state stack whose top is 818 YYSSP. 819 820 Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is 821 not large enough to hold the message. In that case, also set 822 *YYMSG_ALLOC to the required number of bytes. Return 2 if the 823 required number of bytes is too large to store. */ 824 static int 825 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg, 826 yytype_int16 *yyssp, int yytoken) 827 { 828 YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]); 829 YYSIZE_T yysize = yysize0; 830 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; 831 /* Internationalized format string. */ 832 const char *yyformat = YY_NULLPTR; 833 /* Arguments of yyformat. */ 834 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; 835 /* Number of reported tokens (one for the "unexpected", one per 836 "expected"). */ 837 int yycount = 0; 838 839 /* There are many possibilities here to consider: 840 - If this state is a consistent state with a default action, then 841 the only way this function was invoked is if the default action 842 is an error action. In that case, don‘t check for expected 843 tokens because there are none. 844 - The only way there can be no lookahead present (in yychar) is if 845 this state is a consistent state with a default action. Thus, 846 detecting the absence of a lookahead is sufficient to determine 847 that there is no unexpected or expected token to report. In that 848 case, just report a simple "syntax error". 849 - Don‘t assume there isn‘t a lookahead just because this state is a 850 consistent state with a default action. There might have been a 851 previous inconsistent state, consistent state with a non-default 852 action, or user semantic action that manipulated yychar. 853 - Of course, the expected token list depends on states to have 854 correct lookahead information, and it depends on the parser not 855 to perform extra reductions after fetching a lookahead from the 856 scanner and before detecting a syntax error. Thus, state merging 857 (from LALR or IELR) and default reductions corrupt the expected 858 token list. However, the list is correct for canonical LR with 859 one exception: it will still contain any token that will not be 860 accepted due to an error action in a later state. 861 */ 862 if (yytoken != YYEMPTY) 863 { 864 int yyn = yypact[*yyssp]; 865 yyarg[yycount++] = yytname[yytoken]; 866 if (!yypact_value_is_default (yyn)) 867 { 868 /* Start YYX at -YYN if negative to avoid negative indexes in 869 YYCHECK. In other words, skip the first -YYN actions for 870 this state because they are default actions. */ 871 int yyxbegin = yyn < 0 ? -yyn : 0; 872 /* Stay within bounds of both yycheck and yytname. */ 873 int yychecklim = YYLAST - yyn + 1; 874 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; 875 int yyx; 876 877 for (yyx = yyxbegin; yyx < yyxend; ++yyx) 878 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR 879 && !yytable_value_is_error (yytable[yyx + yyn])) 880 { 881 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) 882 { 883 yycount = 1; 884 yysize = yysize0; 885 break; 886 } 887 yyarg[yycount++] = yytname[yyx]; 888 { 889 YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]); 890 if (! (yysize <= yysize1 891 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) 892 return 2; 893 yysize = yysize1; 894 } 895 } 896 } 897 } 898 899 switch (yycount) 900 { 901 # define YYCASE_(N, S) 902 case N: 903 yyformat = S; 904 break 905 YYCASE_(0, YY_("syntax error")); 906 YYCASE_(1, YY_("syntax error, unexpected %s")); 907 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); 908 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); 909 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); 910 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); 911 # undef YYCASE_ 912 } 913 914 { 915 YYSIZE_T yysize1 = yysize + yystrlen (yyformat); 916 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) 917 return 2; 918 yysize = yysize1; 919 } 920 921 if (*yymsg_alloc < yysize) 922 { 923 *yymsg_alloc = 2 * yysize; 924 if (! (yysize <= *yymsg_alloc 925 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM)) 926 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM; 927 return 1; 928 } 929 930 /* Avoid sprintf, as that infringes on the user‘s name space. 931 Don‘t have undefined behavior even if the translation 932 produced a string with the wrong number of "%s"s. */ 933 { 934 char *yyp = *yymsg; 935 int yyi = 0; 936 while ((*yyp = *yyformat) != ‘\0‘) 937 if (*yyp == ‘%‘ && yyformat[1] == ‘s‘ && yyi < yycount) 938 { 939 yyp += yytnamerr (yyp, yyarg[yyi++]); 940 yyformat += 2; 941 } 942 else 943 { 944 yyp++; 945 yyformat++; 946 } 947 } 948 return 0; 949 } 950 #endif /* YYERROR_VERBOSE */ 951 952 /*-----------------------------------------------. 953 | Release the memory associated to this symbol. | 954 `-----------------------------------------------*/ 955 956 static void 957 yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep) 958 { 959 YYUSE (yyvaluep); 960 if (!yymsg) 961 yymsg = "Deleting"; 962 YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); 963 964 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 965 YYUSE (yytype); 966 YY_IGNORE_MAYBE_UNINITIALIZED_END 967 } 968 969 970 971 972 /* The lookahead symbol. */ 973 int yychar; 974 975 /* The semantic value of the lookahead symbol. */ 976 YYSTYPE yylval; 977 /* Number of syntax errors so far. */ 978 int yynerrs; 979 980 981 /*----------. 982 | yyparse. | 983 `----------*/ 984 985 int 986 yyparse (void) 987 { 988 int yystate; 989 /* Number of tokens to shift before error messages enabled. */ 990 int yyerrstatus; 991 992 /* The stacks and their tools: 993 ‘yyss‘: related to states. 994 ‘yyvs‘: related to semantic values. 995 996 Refer to the stacks through separate pointers, to allow yyoverflow 997 to reallocate them elsewhere. */ 998 999 /* The state stack. */ 1000 yytype_int16 yyssa[YYINITDEPTH]; 1001 yytype_int16 *yyss; 1002 yytype_int16 *yyssp; 1003 1004 /* The semantic value stack. */ 1005 YYSTYPE yyvsa[YYINITDEPTH]; 1006 YYSTYPE *yyvs; 1007 YYSTYPE *yyvsp; 1008 1009 YYSIZE_T yystacksize; 1010 1011 int yyn; 1012 int yyresult; 1013 /* Lookahead token as an internal (translated) token number. */ 1014 int yytoken = 0; 1015 /* The variables used to return semantic value and location from the 1016 action routines. */ 1017 YYSTYPE yyval; 1018 1019 #if YYERROR_VERBOSE 1020 /* Buffer for error messages, and its allocated size. */ 1021 char yymsgbuf[128]; 1022 char *yymsg = yymsgbuf; 1023 YYSIZE_T yymsg_alloc = sizeof yymsgbuf; 1024 #endif 1025 1026 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)) 1027 1028 /* The number of symbols on the RHS of the reduced rule. 1029 Keep to zero when no symbol should be popped. */ 1030 int yylen = 0; 1031 1032 yyssp = yyss = yyssa; 1033 yyvsp = yyvs = yyvsa; 1034 yystacksize = YYINITDEPTH; 1035 1036 YYDPRINTF ((stderr, "Starting parse\n")); 1037 1038 yystate = 0; 1039 yyerrstatus = 0; 1040 yynerrs = 0; 1041 yychar = YYEMPTY; /* Cause a token to be read. */ 1042 goto yysetstate; 1043 1044 /*------------------------------------------------------------. 1045 | yynewstate -- Push a new state, which is found in yystate. | 1046 `------------------------------------------------------------*/ 1047 yynewstate: 1048 /* In all cases, when you get here, the value and location stacks 1049 have just been pushed. So pushing a state here evens the stacks. */ 1050 yyssp++; 1051 1052 yysetstate: 1053 *yyssp = yystate; 1054 1055 if (yyss + yystacksize - 1 <= yyssp) 1056 { 1057 /* Get the current used size of the three stacks, in elements. */ 1058 YYSIZE_T yysize = yyssp - yyss + 1; 1059 1060 #ifdef yyoverflow 1061 { 1062 /* Give user a chance to reallocate the stack. Use copies of 1063 these so that the &‘s don‘t force the real ones into 1064 memory. */ 1065 YYSTYPE *yyvs1 = yyvs; 1066 yytype_int16 *yyss1 = yyss; 1067 1068 /* Each stack pointer address is followed by the size of the 1069 data in use in that stack, in bytes. This used to be a 1070 conditional around just the two extra args, but that might 1071 be undefined if yyoverflow is a macro. */ 1072 yyoverflow (YY_("memory exhausted"), 1073 &yyss1, yysize * sizeof (*yyssp), 1074 &yyvs1, yysize * sizeof (*yyvsp), 1075 &yystacksize); 1076 1077 yyss = yyss1; 1078 yyvs = yyvs1; 1079 } 1080 #else /* no yyoverflow */ 1081 # ifndef YYSTACK_RELOCATE 1082 goto yyexhaustedlab; 1083 # else 1084 /* Extend the stack our own way. */ 1085 if (YYMAXDEPTH <= yystacksize) 1086 goto yyexhaustedlab; 1087 yystacksize *= 2; 1088 if (YYMAXDEPTH < yystacksize) 1089 yystacksize = YYMAXDEPTH; 1090 1091 { 1092 yytype_int16 *yyss1 = yyss; 1093 union yyalloc *yyptr = 1094 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize)); 1095 if (! yyptr) 1096 goto yyexhaustedlab; 1097 YYSTACK_RELOCATE (yyss_alloc, yyss); 1098 YYSTACK_RELOCATE (yyvs_alloc, yyvs); 1099 # undef YYSTACK_RELOCATE 1100 if (yyss1 != yyssa) 1101 YYSTACK_FREE (yyss1); 1102 } 1103 # endif 1104 #endif /* no yyoverflow */ 1105 1106 yyssp = yyss + yysize - 1; 1107 yyvsp = yyvs + yysize - 1; 1108 1109 YYDPRINTF ((stderr, "Stack size increased to %lu\n", 1110 (unsigned long int) yystacksize)); 1111 1112 if (yyss + yystacksize - 1 <= yyssp) 1113 YYABORT; 1114 } 1115 1116 YYDPRINTF ((stderr, "Entering state %d\n", yystate)); 1117 1118 if (yystate == YYFINAL) 1119 YYACCEPT; 1120 1121 goto yybackup; 1122 1123 /*-----------. 1124 | yybackup. | 1125 `-----------*/ 1126 yybackup: 1127 1128 /* Do appropriate processing given the current state. Read a 1129 lookahead token if we need one and don‘t already have one. */ 1130 1131 /* First try to decide what to do without reference to lookahead token. */ 1132 yyn = yypact[yystate]; 1133 if (yypact_value_is_default (yyn)) 1134 goto yydefault; 1135 1136 /* Not known => get a lookahead token if don‘t already have one. */ 1137 1138 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */ 1139 if (yychar == YYEMPTY) 1140 { 1141 YYDPRINTF ((stderr, "Reading a token: ")); 1142 yychar = yylex (); 1143 } 1144 1145 if (yychar <= YYEOF) 1146 { 1147 yychar = yytoken = YYEOF; 1148 YYDPRINTF ((stderr, "Now at end of input.\n")); 1149 } 1150 else 1151 { 1152 yytoken = YYTRANSLATE (yychar); 1153 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); 1154 } 1155 1156 /* If the proper action on seeing token YYTOKEN is to reduce or to 1157 detect an error, take that action. */ 1158 yyn += yytoken; 1159 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken) 1160 goto yydefault; 1161 yyn = yytable[yyn]; 1162 if (yyn <= 0) 1163 { 1164 if (yytable_value_is_error (yyn)) 1165 goto yyerrlab; 1166 yyn = -yyn; 1167 goto yyreduce; 1168 } 1169 1170 /* Count tokens shifted since error; after three, turn off error 1171 status. */ 1172 if (yyerrstatus) 1173 yyerrstatus--; 1174 1175 /* Shift the lookahead token. */ 1176 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); 1177 1178 /* Discard the shifted token. */ 1179 yychar = YYEMPTY; 1180 1181 yystate = yyn; 1182 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 1183 *++yyvsp = yylval; 1184 YY_IGNORE_MAYBE_UNINITIALIZED_END 1185 1186 goto yynewstate; 1187 1188 1189 /*-----------------------------------------------------------. 1190 | yydefault -- do the default action for the current state. | 1191 `-----------------------------------------------------------*/ 1192 yydefault: 1193 yyn = yydefact[yystate]; 1194 if (yyn == 0) 1195 goto yyerrlab; 1196 goto yyreduce; 1197 1198 1199 /*-----------------------------. 1200 | yyreduce -- Do a reduction. | 1201 `-----------------------------*/ 1202 yyreduce: 1203 /* yyn is the number of a rule to reduce with. */ 1204 yylen = yyr2[yyn]; 1205 1206 /* If YYLEN is nonzero, implement the default value of the action: 1207 ‘$$ = $1‘. 1208 1209 Otherwise, the following line sets YYVAL to garbage. 1210 This behavior is undocumented and Bison 1211 users should not rely upon it. Assigning to YYVAL 1212 unconditionally makes the parser a bit smaller, and it avoids a 1213 GCC warning that YYVAL may be used uninitialized. */ 1214 yyval = yyvsp[1-yylen]; 1215 1216 1217 YY_REDUCE_PRINT (yyn); 1218 switch (yyn) 1219 { 1220 case 4: 1221 #line 22 "mycalc.y" /* yacc.c:1646 */ 1222 { 1223 printf(">>%lf\n", (yyvsp[-1].double_value)); 1224 } 1225 #line 1226 "mycalc.tab.c" /* yacc.c:1646 */ 1226 break; 1227 1228 case 6: 1229 #line 28 "mycalc.y" /* yacc.c:1646 */ 1230 { 1231 (yyval.double_value) = (yyvsp[-2].double_value) + (yyvsp[0].double_value); 1232 } 1233 #line 1234 "mycalc.tab.c" /* yacc.c:1646 */ 1234 break; 1235 1236 case 7: 1237 #line 32 "mycalc.y" /* yacc.c:1646 */ 1238 { 1239 (yyval.double_value) = (yyvsp[-2].double_value) - (yyvsp[0].double_value); 1240 } 1241 #line 1242 "mycalc.tab.c" /* yacc.c:1646 */ 1242 break; 1243 1244 case 9: 1245 #line 39 "mycalc.y" /* yacc.c:1646 */ 1246 { 1247 (yyval.double_value) = (yyvsp[-2].double_value) * (yyvsp[0].double_value); 1248 } 1249 #line 1250 "mycalc.tab.c" /* yacc.c:1646 */ 1250 break; 1251 1252 case 10: 1253 #line 43 "mycalc.y" /* yacc.c:1646 */ 1254 { 1255 (yyval.double_value) = (yyvsp[-2].double_value) / (yyvsp[0].double_value); 1256 } 1257 #line 1258 "mycalc.tab.c" /* yacc.c:1646 */ 1258 break; 1259 1260 case 12: 1261 #line 50 "mycalc.y" /* yacc.c:1646 */ 1262 { 1263 (yyval.double_value) = -(yyvsp[0].double_value); 1264 } 1265 #line 1266 "mycalc.tab.c" /* yacc.c:1646 */ 1266 break; 1267 1268 case 13: 1269 #line 54 "mycalc.y" /* yacc.c:1646 */ 1270 { 1271 (yyval.double_value) = (yyvsp[-1].double_value); 1272 } 1273 #line 1274 "mycalc.tab.c" /* yacc.c:1646 */ 1274 break; 1275 1276 1277 #line 1278 "mycalc.tab.c" /* yacc.c:1646 */ 1278 default: break; 1279 } 1280 /* User semantic actions sometimes alter yychar, and that requires 1281 that yytoken be updated with the new translation. We take the 1282 approach of translating immediately before every use of yytoken. 1283 One alternative is translating here after every semantic action, 1284 but that translation would be missed if the semantic action invokes 1285 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or 1286 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an 1287 incorrect destructor might then be invoked immediately. In the 1288 case of YYERROR or YYBACKUP, subsequent parser actions might lead 1289 to an incorrect destructor call or verbose syntax error message 1290 before the lookahead is translated. */ 1291 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc); 1292 1293 YYPOPSTACK (yylen); 1294 yylen = 0; 1295 YY_STACK_PRINT (yyss, yyssp); 1296 1297 *++yyvsp = yyval; 1298 1299 /* Now ‘shift‘ the result of the reduction. Determine what state 1300 that goes to, based on the state we popped back to and the rule 1301 number reduced by. */ 1302 1303 yyn = yyr1[yyn]; 1304 1305 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp; 1306 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp) 1307 yystate = yytable[yystate]; 1308 else 1309 yystate = yydefgoto[yyn - YYNTOKENS]; 1310 1311 goto yynewstate; 1312 1313 1314 /*--------------------------------------. 1315 | yyerrlab -- here on detecting error. | 1316 `--------------------------------------*/ 1317 yyerrlab: 1318 /* Make sure we have latest lookahead translation. See comments at 1319 user semantic actions for why this is necessary. */ 1320 yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar); 1321 1322 /* If not already recovering from an error, report this error. */ 1323 if (!yyerrstatus) 1324 { 1325 ++yynerrs; 1326 #if ! YYERROR_VERBOSE 1327 yyerror (YY_("syntax error")); 1328 #else 1329 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, 1330 yyssp, yytoken) 1331 { 1332 char const *yymsgp = YY_("syntax error"); 1333 int yysyntax_error_status; 1334 yysyntax_error_status = YYSYNTAX_ERROR; 1335 if (yysyntax_error_status == 0) 1336 yymsgp = yymsg; 1337 else if (yysyntax_error_status == 1) 1338 { 1339 if (yymsg != yymsgbuf) 1340 YYSTACK_FREE (yymsg); 1341 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc); 1342 if (!yymsg) 1343 { 1344 yymsg = yymsgbuf; 1345 yymsg_alloc = sizeof yymsgbuf; 1346 yysyntax_error_status = 2; 1347 } 1348 else 1349 { 1350 yysyntax_error_status = YYSYNTAX_ERROR; 1351 yymsgp = yymsg; 1352 } 1353 } 1354 yyerror (yymsgp); 1355 if (yysyntax_error_status == 2) 1356 goto yyexhaustedlab; 1357 } 1358 # undef YYSYNTAX_ERROR 1359 #endif 1360 } 1361 1362 1363 1364 if (yyerrstatus == 3) 1365 { 1366 /* If just tried and failed to reuse lookahead token after an 1367 error, discard it. */ 1368 1369 if (yychar <= YYEOF) 1370 { 1371 /* Return failure if at end of input. */ 1372 if (yychar == YYEOF) 1373 YYABORT; 1374 } 1375 else 1376 { 1377 yydestruct ("Error: discarding", 1378 yytoken, &yylval); 1379 yychar = YYEMPTY; 1380 } 1381 } 1382 1383 /* Else will try to reuse lookahead token after shifting the error 1384 token. */ 1385 goto yyerrlab1; 1386 1387 1388 /*---------------------------------------------------. 1389 | yyerrorlab -- error raised explicitly by YYERROR. | 1390 `---------------------------------------------------*/ 1391 yyerrorlab: 1392 1393 /* Pacify compilers like GCC when the user code never invokes 1394 YYERROR and the label yyerrorlab therefore never appears in user 1395 code. */ 1396 if (/*CONSTCOND*/ 0) 1397 goto yyerrorlab; 1398 1399 /* Do not reclaim the symbols of the rule whose action triggered 1400 this YYERROR. */ 1401 YYPOPSTACK (yylen); 1402 yylen = 0; 1403 YY_STACK_PRINT (yyss, yyssp); 1404 yystate = *yyssp; 1405 goto yyerrlab1; 1406 1407 1408 /*-------------------------------------------------------------. 1409 | yyerrlab1 -- common code for both syntax error and YYERROR. | 1410 `-------------------------------------------------------------*/ 1411 yyerrlab1: 1412 yyerrstatus = 3; /* Each real token shifted decrements this. */ 1413 1414 for (;;) 1415 { 1416 yyn = yypact[yystate]; 1417 if (!yypact_value_is_default (yyn)) 1418 { 1419 yyn += YYTERROR; 1420 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) 1421 { 1422 yyn = yytable[yyn]; 1423 if (0 < yyn) 1424 break; 1425 } 1426 } 1427 1428 /* Pop the current state because it cannot handle the error token. */ 1429 if (yyssp == yyss) 1430 YYABORT; 1431 1432 1433 yydestruct ("Error: popping", 1434 yystos[yystate], yyvsp); 1435 YYPOPSTACK (1); 1436 yystate = *yyssp; 1437 YY_STACK_PRINT (yyss, yyssp); 1438 } 1439 1440 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 1441 *++yyvsp = yylval; 1442 YY_IGNORE_MAYBE_UNINITIALIZED_END 1443 1444 1445 /* Shift the error token. */ 1446 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp); 1447 1448 yystate = yyn; 1449 goto yynewstate; 1450 1451 1452 /*-------------------------------------. 1453 | yyacceptlab -- YYACCEPT comes here. | 1454 `-------------------------------------*/ 1455 yyacceptlab: 1456 yyresult = 0; 1457 goto yyreturn; 1458 1459 /*-----------------------------------. 1460 | yyabortlab -- YYABORT comes here. | 1461 `-----------------------------------*/ 1462 yyabortlab: 1463 yyresult = 1; 1464 goto yyreturn; 1465 1466 #if !defined yyoverflow || YYERROR_VERBOSE 1467 /*-------------------------------------------------. 1468 | yyexhaustedlab -- memory exhaustion comes here. | 1469 `-------------------------------------------------*/ 1470 yyexhaustedlab: 1471 yyerror (YY_("memory exhausted")); 1472 yyresult = 2; 1473 /* Fall through. */ 1474 #endif 1475 1476 yyreturn: 1477 if (yychar != YYEMPTY) 1478 { 1479 /* Make sure we have latest lookahead translation. See comments at 1480 user semantic actions for why this is necessary. */ 1481 yytoken = YYTRANSLATE (yychar); 1482 yydestruct ("Cleanup: discarding lookahead", 1483 yytoken, &yylval); 1484 } 1485 /* Do not reclaim the symbols of the rule whose action triggered 1486 this YYABORT or YYACCEPT. */ 1487 YYPOPSTACK (yylen); 1488 YY_STACK_PRINT (yyss, yyssp); 1489 while (yyssp != yyss) 1490 { 1491 yydestruct ("Cleanup: popping", 1492 yystos[*yyssp], yyvsp); 1493 YYPOPSTACK (1); 1494 } 1495 #ifndef yyoverflow 1496 if (yyss != yyssa) 1497 YYSTACK_FREE (yyss); 1498 #endif 1499 #if YYERROR_VERBOSE 1500 if (yymsg != yymsgbuf) 1501 YYSTACK_FREE (yymsg); 1502 #endif 1503 return yyresult; 1504 } 1505 #line 59 "mycalc.y" /* yacc.c:1906 */ 1506 1507 1508 int yyerror(char const *str) 1509 { 1510 extern char *yytext; 1511 fprintf(stderr, "parser error near %s\n", yytext); 1512 return 0; 1513 } 1514 1515 int main() 1516 { 1517 extern int yyparse(void); 1518 extern FILE *yyin; 1519 yyin = stdin; 1520 if (yyparse()) 1521 { 1522 fprintf(stderr, "Error ! Error! Error!\n"); 1523 exit(1); 1524 } 1525 return 0; 1526 }
1 #line 3 "lex.yy.c" 2 3 #define YY_INT_ALIGNED short int 4 5 /* A lexical scanner generated by flex */ 6 7 #define FLEX_SCANNER 8 #define YY_FLEX_MAJOR_VERSION 2 9 #define YY_FLEX_MINOR_VERSION 5 10 #define YY_FLEX_SUBMINOR_VERSION 35 11 #if YY_FLEX_SUBMINOR_VERSION > 0 12 #define FLEX_BETA 13 #endif 14 15 /* First, we deal with platform-specific or compiler-specific issues. */ 16 17 /* begin standard C headers. */ 18 #include <stdio.h> 19 #include <string.h> 20 #include <errno.h> 21 #include <stdlib.h> 22 23 /* end standard C headers. */ 24 25 /* flex integer type definitions */ 26 27 #ifndef FLEXINT_H 28 #define FLEXINT_H 29 30 /* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */ 31 32 #if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L 33 34 /* C99 says to define __STDC_LIMIT_MACROS before including stdint.h, 35 * if you want the limit (max/min) macros for int types. 36 */ 37 #ifndef __STDC_LIMIT_MACROS 38 #define __STDC_LIMIT_MACROS 1 39 #endif 40 41 #include <inttypes.h> 42 typedef int8_t flex_int8_t; 43 typedef uint8_t flex_uint8_t; 44 typedef int16_t flex_int16_t; 45 typedef uint16_t flex_uint16_t; 46 typedef int32_t flex_int32_t; 47 typedef uint32_t flex_uint32_t; 48 #else 49 typedef signed char flex_int8_t; 50 typedef short int flex_int16_t; 51 typedef int flex_int32_t; 52 typedef unsigned char flex_uint8_t; 53 typedef unsigned short int flex_uint16_t; 54 typedef unsigned int flex_uint32_t; 55 56 /* Limits of integral types. */ 57 #ifndef INT8_MIN 58 #define INT8_MIN (-128) 59 #endif 60 #ifndef INT16_MIN 61 #define INT16_MIN (-32767-1) 62 #endif 63 #ifndef INT32_MIN 64 #define INT32_MIN (-2147483647-1) 65 #endif 66 #ifndef INT8_MAX 67 #define INT8_MAX (127) 68 #endif 69 #ifndef INT16_MAX 70 #define INT16_MAX (32767) 71 #endif 72 #ifndef INT32_MAX 73 #define INT32_MAX (2147483647) 74 #endif 75 #ifndef UINT8_MAX 76 #define UINT8_MAX (255U) 77 #endif 78 #ifndef UINT16_MAX 79 #define UINT16_MAX (65535U) 80 #endif 81 #ifndef UINT32_MAX 82 #define UINT32_MAX (4294967295U) 83 #endif 84 85 #endif /* ! C99 */ 86 87 #endif /* ! FLEXINT_H */ 88 89 #ifdef __cplusplus 90 91 /* The "const" storage-class-modifier is valid. */ 92 #define YY_USE_CONST 93 94 #else /* ! __cplusplus */ 95 96 /* C99 requires __STDC__ to be defined as 1. */ 97 #if defined (__STDC__) 98 99 #define YY_USE_CONST 100 101 #endif /* defined (__STDC__) */ 102 #endif /* ! __cplusplus */ 103 104 #ifdef YY_USE_CONST 105 #define yyconst const 106 #else 107 #define yyconst 108 #endif 109 110 /* Returned upon end-of-file. */ 111 #define YY_NULL 0 112 113 /* Promotes a possibly negative, possibly signed char to an unsigned 114 * integer for use as an array index. If the signed char is negative, 115 * we want to instead treat it as an 8-bit unsigned char, hence the 116 * double cast. 117 */ 118 #define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c) 119 120 /* Enter a start condition. This macro really ought to take a parameter, 121 * but we do it the disgusting crufty way forced on us by the ()-less 122 * definition of BEGIN. 123 */ 124 #define BEGIN (yy_start) = 1 + 2 * 125 126 /* Translate the current start state into a value that can be later handed 127 * to BEGIN to return to the state. The YYSTATE alias is for lex 128 * compatibility. 129 */ 130 #define YY_START (((yy_start) - 1) / 2) 131 #define YYSTATE YY_START 132 133 /* Action number for EOF rule of a given start state. */ 134 #define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1) 135 136 /* Special action meaning "start processing a new file". */ 137 #define YY_NEW_FILE yyrestart(yyin ) 138 139 #define YY_END_OF_BUFFER_CHAR 0 140 141 /* Size of default input buffer. */ 142 #ifndef YY_BUF_SIZE 143 #ifdef __ia64__ 144 /* On IA-64, the buffer size is 16k, not 8k. 145 * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case. 146 * Ditto for the __ia64__ case accordingly. 147 */ 148 #define YY_BUF_SIZE 32768 149 #else 150 #define YY_BUF_SIZE 16384 151 #endif /* __ia64__ */ 152 #endif 153 154 /* The state buf must be large enough to hold one state per character in the main buffer. 155 */ 156 #define YY_STATE_BUF_SIZE ((YY_BUF_SIZE + 2) * sizeof(yy_state_type)) 157 158 #ifndef YY_TYPEDEF_YY_BUFFER_STATE 159 #define YY_TYPEDEF_YY_BUFFER_STATE 160 typedef struct yy_buffer_state *YY_BUFFER_STATE; 161 #endif 162 163 extern int yyleng; 164 165 extern FILE *yyin, *yyout; 166 167 #define EOB_ACT_CONTINUE_SCAN 0 168 #define EOB_ACT_END_OF_FILE 1 169 #define EOB_ACT_LAST_MATCH 2 170 171 #define YY_LESS_LINENO(n) 172 173 /* Return all but the first "n" matched characters back to the input stream. */ 174 #define yyless(n) 175 do 176 { 177 /* Undo effects of setting up yytext. */ 178 int yyless_macro_arg = (n); 179 YY_LESS_LINENO(yyless_macro_arg); 180 *yy_cp = (yy_hold_char); 181 YY_RESTORE_YY_MORE_OFFSET 182 (yy_c_buf_p) = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; 183 YY_DO_BEFORE_ACTION; /* set up yytext again */ 184 } 185 while ( 0 ) 186 187 #define unput(c) yyunput( c, (yytext_ptr) ) 188 189 #ifndef YY_TYPEDEF_YY_SIZE_T 190 #define YY_TYPEDEF_YY_SIZE_T 191 typedef size_t yy_size_t; 192 #endif 193 194 #ifndef YY_STRUCT_YY_BUFFER_STATE 195 #define YY_STRUCT_YY_BUFFER_STATE 196 struct yy_buffer_state 197 { 198 FILE *yy_input_file; 199 200 char *yy_ch_buf; /* input buffer */ 201 char *yy_buf_pos; /* current position in input buffer */ 202 203 /* Size of input buffer in bytes, not including room for EOB 204 * characters. 205 */ 206 yy_size_t yy_buf_size; 207 208 /* Number of characters read into yy_ch_buf, not including EOB 209 * characters. 210 */ 211 int yy_n_chars; 212 213 /* Whether we "own" the buffer - i.e., we know we created it, 214 * and can realloc() it to grow it, and should free() it to 215 * delete it. 216 */ 217 int yy_is_our_buffer; 218 219 /* Whether this is an "interactive" input source; if so, and 220 * if we‘re using stdio for input, then we want to use getc() 221 * instead of fread(), to make sure we stop fetching input after 222 * each newline. 223 */ 224 int yy_is_interactive; 225 226 /* Whether we‘re considered to be at the beginning of a line. 227 * If so, ‘^‘ rules will be active on the next match, otherwise 228 * not. 229 */ 230 int yy_at_bol; 231 232 int yy_bs_lineno; /**< The line count. */ 233 int yy_bs_column; /**< The column count. */ 234 235 /* Whether to try to fill the input buffer when we reach the 236 * end of it. 237 */ 238 int yy_fill_buffer; 239 240 int yy_buffer_status; 241 242 #define YY_BUFFER_NEW 0 243 #define YY_BUFFER_NORMAL 1 244 /* When an EOF‘s been seen but there‘s still some text to process 245 * then we mark the buffer as YY_EOF_PENDING, to indicate that we 246 * shouldn‘t try reading from the input source any more. We might 247 * still have a bunch of tokens to match, though, because of 248 * possible backing-up. 249 * 250 * When we actually see the EOF, we change the status to "new" 251 * (via yyrestart()), so that the user can continue scanning by 252 * just pointing yyin at a new input file. 253 */ 254 #define YY_BUFFER_EOF_PENDING 2 255 256 }; 257 #endif /* !YY_STRUCT_YY_BUFFER_STATE */ 258 259 /* Stack of input buffers. */ 260 static size_t yy_buffer_stack_top = 0; /**< index of top of stack. */ 261 static size_t yy_buffer_stack_max = 0; /**< capacity of stack. */ 262 static YY_BUFFER_STATE * yy_buffer_stack = 0; /**< Stack as an array. */ 263 264 /* We provide macros for accessing buffer states in case in the 265 * future we want to put the buffer states in a more general 266 * "scanner state". 267 * 268 * Returns the top of the stack, or NULL. 269 */ 270 #define YY_CURRENT_BUFFER ( (yy_buffer_stack) 271 ? (yy_buffer_stack)[(yy_buffer_stack_top)] 272 : NULL) 273 274 /* Same as previous macro, but useful when we know that the buffer stack is not 275 * NULL or when we need an lvalue. For internal use only. 276 */ 277 #define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)] 278 279 /* yy_hold_char holds the character lost when yytext is formed. */ 280 static char yy_hold_char; 281 static int yy_n_chars; /* number of characters read into yy_ch_buf */ 282 int yyleng; 283 284 /* Points to current character in buffer. */ 285 static char *yy_c_buf_p = (char *) 0; 286 static int yy_init = 0; /* whether we need to initialize */ 287 static int yy_start = 0; /* start state number */ 288 289 /* Flag which is used to allow yywrap()‘s to do buffer switches 290 * instead of setting up a fresh yyin. A bit of a hack ... 291 */ 292 static int yy_did_buffer_switch_on_eof; 293 294 void yyrestart (FILE *input_file ); 295 void yy_switch_to_buffer (YY_BUFFER_STATE new_buffer ); 296 YY_BUFFER_STATE yy_create_buffer (FILE *file,int size ); 297 void yy_delete_buffer (YY_BUFFER_STATE b ); 298 void yy_flush_buffer (YY_BUFFER_STATE b ); 299 void yypush_buffer_state (YY_BUFFER_STATE new_buffer ); 300 void yypop_buffer_state (void ); 301 302 static void yyensure_buffer_stack (void ); 303 static void yy_load_buffer_state (void ); 304 static void yy_init_buffer (YY_BUFFER_STATE b,FILE *file ); 305 306 #define YY_FLUSH_BUFFER yy_flush_buffer(YY_CURRENT_BUFFER ) 307 308 YY_BUFFER_STATE yy_scan_buffer (char *base,yy_size_t size ); 309 YY_BUFFER_STATE yy_scan_string (yyconst char *yy_str ); 310 YY_BUFFER_STATE yy_scan_bytes (yyconst char *bytes,int len ); 311 312 void *yyalloc (yy_size_t ); 313 void *yyrealloc (void *,yy_size_t ); 314 void yyfree (void * ); 315 316 #define yy_new_buffer yy_create_buffer 317 318 #define yy_set_interactive(is_interactive) 319 { 320 if ( ! YY_CURRENT_BUFFER ){ 321 yyensure_buffer_stack (); 322 YY_CURRENT_BUFFER_LVALUE = 323 yy_create_buffer(yyin,YY_BUF_SIZE ); 324 } 325 YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; 326 } 327 328 #define yy_set_bol(at_bol) 329 { 330 if ( ! YY_CURRENT_BUFFER ){ 331 yyensure_buffer_stack (); 332 YY_CURRENT_BUFFER_LVALUE = 333 yy_create_buffer(yyin,YY_BUF_SIZE ); 334 } 335 YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; 336 } 337 338 #define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol) 339 340 /* Begin user sect3 */ 341 342 typedef unsigned char YY_CHAR; 343 344 FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0; 345 346 typedef int yy_state_type; 347 348 extern int yylineno; 349 350 int yylineno = 1; 351 352 extern char *yytext; 353 #define yytext_ptr yytext 354 355 static yy_state_type yy_get_previous_state (void ); 356 static yy_state_type yy_try_NUL_trans (yy_state_type current_state ); 357 static int yy_get_next_buffer (void ); 358 static void yy_fatal_error (yyconst char msg[] ); 359 360 /* Done after the current pattern has been matched and before the 361 * corresponding action - sets up yytext. 362 */ 363 #define YY_DO_BEFORE_ACTION 364 (yytext_ptr) = yy_bp; 365 yyleng = (size_t) (yy_cp - yy_bp); 366 (yy_hold_char) = *yy_cp; 367 *yy_cp = ‘\0‘; 368 (yy_c_buf_p) = yy_cp; 369 370 #define YY_NUM_RULES 11 371 #define YY_END_OF_BUFFER 12 372 /* This struct is not used in this scanner, 373 but its presence is necessary. */ 374 struct yy_trans_info 375 { 376 flex_int32_t yy_verify; 377 flex_int32_t yy_nxt; 378 }; 379 static yyconst flex_int16_t yy_accept[20] = 380 { 0, 381 0, 0, 12, 10, 9, 7, 5, 6, 3, 1, 382 2, 4, 8, 8, 0, 0, 8, 8, 0 383 } ; 384 385 static yyconst flex_int32_t yy_ec[256] = 386 { 0, 387 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 388 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 389 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 390 1, 2, 1, 1, 1, 1, 1, 1, 1, 4, 391 5, 6, 7, 1, 8, 9, 10, 11, 12, 12, 392 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 393 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 394 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 395 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 396 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 397 398 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 399 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 400 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 401 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 402 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 403 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 404 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 405 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 406 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 407 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 408 409 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 410 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 411 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 412 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 413 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 414 1, 1, 1, 1, 1 415 } ; 416 417 static yyconst flex_int32_t yy_meta[13] = 418 { 0, 419 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 420 3, 3 421 } ; 422 423 static yyconst flex_int16_t yy_base[23] = 424 { 0, 425 0, 0, 22, 23, 23, 23, 23, 23, 23, 23, 426 23, 23, 12, 11, 0, 10, 9, 0, 23, 11, 427 13, 14 428 } ; 429 430 static yyconst flex_int16_t yy_def[23] = 431 { 0, 432 19, 1, 19, 19, 19, 19, 19, 19, 19, 19, 433 19, 19, 20, 21, 22, 20, 21, 22, 0, 19, 434 19, 19 435 } ; 436 437 static yyconst flex_int16_t yy_nxt[36] = 438 { 0, 439 4, 5, 6, 7, 8, 9, 10, 11, 4, 12, 440 13, 14, 16, 16, 17, 17, 18, 15, 15, 15, 441 15, 19, 3, 19, 19, 19, 19, 19, 19, 19, 442 19, 19, 19, 19, 19 443 } ; 444 445 static yyconst flex_int16_t yy_chk[36] = 446 { 0, 447 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 448 1, 1, 20, 20, 21, 21, 22, 17, 16, 14, 449 13, 3, 19, 19, 19, 19, 19, 19, 19, 19, 450 19, 19, 19, 19, 19 451 } ; 452 453 static yy_state_type yy_last_accepting_state; 454 static char *yy_last_accepting_cpos; 455 456 extern int yy_flex_debug; 457 int yy_flex_debug = 0; 458 459 /* The intent behind this definition is that it‘ll catch 460 * any uses of REJECT which flex missed. 461 */ 462 #define REJECT reject_used_but_not_detected 463 #define yymore() yymore_used_but_not_detected 464 #define YY_MORE_ADJ 0 465 #define YY_RESTORE_YY_MORE_OFFSET 466 char *yytext; 467 #line 1 "mycalc.l" 468 #line 2 "mycalc.l" 469 #include <stdio.h> 470 #include "mycalc.tab.h" 471 472 int yywrap(void) {return 1;} 473 #line 475 "lex.yy.c" 474 475 #define INITIAL 0 476 477 #ifndef YY_NO_UNISTD_H 478 /* Special case for "unistd.h", since it is non-ANSI. We include it way 479 * down here because we want the user‘s section 1 to have been scanned first. 480 * The user has a chance to override it with an option. 481 */ 482 #include <unistd.h> 483 #endif 484 485 #ifndef YY_EXTRA_TYPE 486 #define YY_EXTRA_TYPE void * 487 #endif 488 489 static int yy_init_globals (void ); 490 491 /* Accessor methods to globals. 492 These are made visible to non-reentrant scanners for convenience. */ 493 494 int yylex_destroy (void ); 495 496 int yyget_debug (void ); 497 498 void yyset_debug (int debug_flag ); 499 500 YY_EXTRA_TYPE yyget_extra (void ); 501 502 void yyset_extra (YY_EXTRA_TYPE user_defined ); 503 504 FILE *yyget_in (void ); 505 506 void yyset_in (FILE * in_str ); 507 508 FILE *yyget_out (void ); 509 510 void yyset_out (FILE * out_str ); 511 512 int yyget_leng (void ); 513 514 char *yyget_text (void ); 515 516 int yyget_lineno (void ); 517 518 void yyset_lineno (int line_number ); 519 520 /* Macros after this point can all be overridden by user definitions in 521 * section 1. 522 */ 523 524 #ifndef YY_SKIP_YYWRAP 525 #ifdef __cplusplus 526 extern "C" int yywrap (void ); 527 #else 528 extern int yywrap (void ); 529 #endif 530 #endif 531 532 static void yyunput (int c,char *buf_ptr ); 533 534 #ifndef yytext_ptr 535 static void yy_flex_strncpy (char *,yyconst char *,int ); 536 #endif 537 538 #ifdef YY_NEED_STRLEN 539 static int yy_flex_strlen (yyconst char * ); 540 #endif 541 542 #ifndef YY_NO_INPUT 543 544 #ifdef __cplusplus 545 static int yyinput (void ); 546 #else 547 static int input (void ); 548 #endif 549 550 #endif 551 552 /* Amount of stuff to slurp up with each read. */ 553 #ifndef YY_READ_BUF_SIZE 554 #ifdef __ia64__ 555 /* On IA-64, the buffer size is 16k, not 8k */ 556 #define YY_READ_BUF_SIZE 16384 557 #else 558 #define YY_READ_BUF_SIZE 8192 559 #endif /* __ia64__ */ 560 #endif 561 562 /* Copy whatever the last rule matched to the standard output. */ 563 #ifndef ECHO 564 /* This used to be an fputs(), but since the string might contain NUL‘s, 565 * we now use fwrite(). 566 */ 567 #define ECHO do { if (fwrite( yytext, yyleng, 1, yyout )) {} } while (0) 568 #endif 569 570 /* Gets input and stuffs it into "buf". number of characters read, or YY_NULL, 571 * is returned in "result". 572 */ 573 #ifndef YY_INPUT 574 #define YY_INPUT(buf,result,max_size) 575 if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) 576 { 577 int c = ‘*‘; 578 size_t n; 579 for ( n = 0; n < max_size && 580 (c = getc( yyin )) != EOF && c != ‘\n‘; ++n ) 581 buf[n] = (char) c; 582 if ( c == ‘\n‘ ) 583 buf[n++] = (char) c; 584 if ( c == EOF && ferror( yyin ) ) 585 YY_FATAL_ERROR( "input in flex scanner failed" ); 586 result = n; 587 } 588 else 589 { 590 errno=0; 591 while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) 592 { 593 if( errno != EINTR) 594 { 595 YY_FATAL_ERROR( "input in flex scanner failed" ); 596 break; 597 } 598 errno=0; 599 clearerr(yyin); 600 } 601 } 602 603 604 #endif 605 606 /* No semi-colon after return; correct usage is to write "yyterminate();" - 607 * we don‘t want an extra ‘;‘ after the "return" because that will cause 608 * some compilers to complain about unreachable statements. 609 */ 610 #ifndef yyterminate 611 #define yyterminate() return YY_NULL 612 #endif 613 614 /* Number of entries by which start-condition stack grows. */ 615 #ifndef YY_START_STACK_INCR 616 #define YY_START_STACK_INCR 25 617 #endif 618 619 /* Report a fatal error. */ 620 #ifndef YY_FATAL_ERROR 621 #define YY_FATAL_ERROR(msg) yy_fatal_error( msg ) 622 #endif 623 624 /* end tables serialization structures and prototypes */ 625 626 /* Default declaration of generated scanner - a define so the user can 627 * easily add parameters. 628 */ 629 #ifndef YY_DECL 630 #define YY_DECL_IS_OURS 1 631 632 extern int yylex (void); 633 634 #define YY_DECL int yylex (void) 635 #endif /* !YY_DECL */ 636 637 /* Code executed at the beginning of each rule, after yytext and yyleng 638 * have been set up. 639 */ 640 #ifndef YY_USER_ACTION 641 #define YY_USER_ACTION 642 #endif 643 644 /* Code executed at the end of each rule. */ 645 #ifndef YY_BREAK 646 #define YY_BREAK break; 647 #endif 648 649 #define YY_RULE_SETUP 650 YY_USER_ACTION 651 652 /** The main scanner function which does all the work. 653 */ 654 YY_DECL 655 { 656 register yy_state_type yy_current_state; 657 register char *yy_cp, *yy_bp; 658 register int yy_act; 659 660 #line 8 "mycalc.l" 661 662 663 #line 665 "lex.yy.c" 664 665 if ( !(yy_init) ) 666 { 667 (yy_init) = 1; 668 669 #ifdef YY_USER_INIT 670 YY_USER_INIT; 671 #endif 672 673 if ( ! (yy_start) ) 674 (yy_start) = 1; /* first start state */ 675 676 if ( ! yyin ) 677 yyin = stdin; 678 679 if ( ! yyout ) 680 yyout = stdout; 681 682 if ( ! YY_CURRENT_BUFFER ) { 683 yyensure_buffer_stack (); 684 YY_CURRENT_BUFFER_LVALUE = 685 yy_create_buffer(yyin,YY_BUF_SIZE ); 686 } 687 688 yy_load_buffer_state( ); 689 } 690 691 while ( 1 ) /* loops until end-of-file is reached */ 692 { 693 yy_cp = (yy_c_buf_p); 694 695 /* Support of yytext. */ 696 *yy_cp = (yy_hold_char); 697 698 /* yy_bp points to the position in yy_ch_buf of the start of 699 * the current run. 700 */ 701 yy_bp = yy_cp; 702 703 yy_current_state = (yy_start); 704 yy_match: 705 do 706 { 707 register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)]; 708 if ( yy_accept[yy_current_state] ) 709 { 710 (yy_last_accepting_state) = yy_current_state; 711 (yy_last_accepting_cpos) = yy_cp; 712 } 713 while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) 714 { 715 yy_current_state = (int) yy_def[yy_current_state]; 716 if ( yy_current_state >= 20 ) 717 yy_c = yy_meta[(unsigned int) yy_c]; 718 } 719 yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c]; 720 ++yy_cp; 721 } 722 while ( yy_base[yy_current_state] != 23 ); 723 724 yy_find_action: 725 yy_act = yy_accept[yy_current_state]; 726 if ( yy_act == 0 ) 727 { /* have to back up */ 728 yy_cp = (yy_last_accepting_cpos); 729 yy_current_state = (yy_last_accepting_state); 730 yy_act = yy_accept[yy_current_state]; 731 } 732 733 YY_DO_BEFORE_ACTION; 734 735 do_action: /* This label is used only to access EOF actions. */ 736 737 switch ( yy_act ) 738 { /* beginning of action switch */ 739 case 0: /* must back up */ 740 /* undo the effects of YY_DO_BEFORE_ACTION */ 741 *yy_cp = (yy_hold_char); 742 yy_cp = (yy_last_accepting_cpos); 743 yy_current_state = (yy_last_accepting_state); 744 goto yy_find_action; 745 746 case 1: 747 YY_RULE_SETUP 748 #line 10 "mycalc.l" 749 return ADD; 750 YY_BREAK 751 case 2: 752 YY_RULE_SETUP 753 #line 11 "mycalc.l" 754 return SUB; 755 YY_BREAK 756 case 3: 757 YY_RULE_SETUP 758 #line 12 "mycalc.l" 759 return MUL; 760 YY_BREAK 761 case 4: 762 YY_RULE_SETUP 763 #line 13 "mycalc.l" 764 return DIV; 765 YY_BREAK 766 case 5: 767 YY_RULE_SETUP 768 #line 14 "mycalc.l" 769 return LP; 770 YY_BREAK 771 case 6: 772 YY_RULE_SETUP 773 #line 15 "mycalc.l" 774 return RP; 775 YY_BREAK 776 case 7: 777 /* rule 7 can match eol */ 778 YY_RULE_SETUP 779 #line 16 "mycalc.l" 780 return CR; 781 YY_BREAK 782 case 8: 783 YY_RULE_SETUP 784 #line 17 "mycalc.l" 785 { 786 double temp; 787 sscanf(yytext, "%lf", &temp); 788 yylval.double_value = temp; 789 return DOUBLE_LITERAL; 790 } 791 YY_BREAK 792 case 9: 793 YY_RULE_SETUP 794 #line 23 "mycalc.l" 795 ; 796 YY_BREAK 797 case 10: 798 YY_RULE_SETUP 799 #line 24 "mycalc.l" 800 { 801 fprintf(stderr, "lexical error.\n"); 802 exit(1); 803 } 804 YY_BREAK 805 case 11: 806 YY_RULE_SETUP 807 #line 29 "mycalc.l" 808 ECHO; 809 YY_BREAK 810 #line 812 "lex.yy.c" 811 case YY_STATE_EOF(INITIAL): 812 yyterminate(); 813 814 case YY_END_OF_BUFFER: 815 { 816 /* Amount of text matched not including the EOB char. */ 817 int yy_amount_of_matched_text = (int) (yy_cp - (yytext_ptr)) - 1; 818 819 /* Undo the effects of YY_DO_BEFORE_ACTION. */ 820 *yy_cp = (yy_hold_char); 821 YY_RESTORE_YY_MORE_OFFSET 822 823 if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW ) 824 { 825 /* We‘re scanning a new file or input source. It‘s 826 * possible that this happened because the user 827 * just pointed yyin at a new source and called 828 * yylex(). If so, then we have to assure 829 * consistency between YY_CURRENT_BUFFER and our 830 * globals. Here is the right place to do so, because 831 * this is the first action (other than possibly a 832 * back-up) that will match for the new input source. 833 */ 834 (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars; 835 YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin; 836 YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL; 837 } 838 839 /* Note that here we test for yy_c_buf_p "<=" to the position 840 * of the first EOB in the buffer, since yy_c_buf_p will 841 * already have been incremented past the NUL character 842 * (since all states make transitions on EOB to the 843 * end-of-buffer state). Contrast this with the test 844 * in input(). 845 */ 846 if ( (yy_c_buf_p) <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] ) 847 { /* This was really a NUL. */ 848 yy_state_type yy_next_state; 849 850 (yy_c_buf_p) = (yytext_ptr) + yy_amount_of_matched_text; 851 852 yy_current_state = yy_get_previous_state( ); 853 854 /* Okay, we‘re now positioned to make the NUL 855 * transition. We couldn‘t have 856 * yy_get_previous_state() go ahead and do it 857 * for us because it doesn‘t know how to deal 858 * with the possibility of jamming (and we don‘t 859 * want to build jamming into it because then it 860 * will run more slowly). 861 */ 862 863 yy_next_state = yy_try_NUL_trans( yy_current_state ); 864 865 yy_bp = (yytext_ptr) + YY_MORE_ADJ; 866 867 if ( yy_next_state ) 868 { 869 /* Consume the NUL. */ 870 yy_cp = ++(yy_c_buf_p); 871 yy_current_state = yy_next_state; 872 goto yy_match; 873 } 874 875 else 876 { 877 yy_cp = (yy_c_buf_p); 878 goto yy_find_action; 879 } 880 } 881 882 else switch ( yy_get_next_buffer( ) ) 883 { 884 case EOB_ACT_END_OF_FILE: 885 { 886 (yy_did_buffer_switch_on_eof) = 0; 887 888 if ( yywrap( ) ) 889 { 890 /* Note: because we‘ve taken care in 891 * yy_get_next_buffer() to have set up 892 * yytext, we can now set up 893 * yy_c_buf_p so that if some total 894 * hoser (like flex itself) wants to 895 * call the scanner after we return the 896 * YY_NULL, it‘ll still work - another 897 * YY_NULL will get returned. 898 */ 899 (yy_c_buf_p) = (yytext_ptr) + YY_MORE_ADJ; 900 901 yy_act = YY_STATE_EOF(YY_START); 902 goto do_action; 903 } 904 905 else 906 { 907 if ( ! (yy_did_buffer_switch_on_eof) ) 908 YY_NEW_FILE; 909 } 910 break; 911 } 912 913 case EOB_ACT_CONTINUE_SCAN: 914 (yy_c_buf_p) = 915 (yytext_ptr) + yy_amount_of_matched_text; 916 917 yy_current_state = yy_get_previous_state( ); 918 919 yy_cp = (yy_c_buf_p); 920 yy_bp = (yytext_ptr) + YY_MORE_ADJ; 921 goto yy_match; 922 923 case EOB_ACT_LAST_MATCH: 924 (yy_c_buf_p) = 925 &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)]; 926 927 yy_current_state = yy_get_previous_state( ); 928 929 yy_cp = (yy_c_buf_p); 930 yy_bp = (yytext_ptr) + YY_MORE_ADJ; 931 goto yy_find_action; 932 } 933 break; 934 } 935 936 default: 937 YY_FATAL_ERROR( 938 "fatal flex scanner internal error--no action found" ); 939 } /* end of action switch */ 940 } /* end of scanning one token */ 941 } /* end of yylex */ 942 943 /* yy_get_next_buffer - try to read in a new buffer 944 * 945 * Returns a code representing an action: 946 * EOB_ACT_LAST_MATCH - 947 * EOB_ACT_CONTINUE_SCAN - continue scanning from current position 948 * EOB_ACT_END_OF_FILE - end of file 949 */ 950 static int yy_get_next_buffer (void) 951 { 952 register char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf; 953 register char *source = (yytext_ptr); 954 register int number_to_move, i; 955 int ret_val; 956 957 if ( (yy_c_buf_p) > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] ) 958 YY_FATAL_ERROR( 959 "fatal flex scanner internal error--end of buffer missed" ); 960 961 if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 ) 962 { /* Don‘t try to fill the buffer, so this is an EOF. */ 963 if ( (yy_c_buf_p) - (yytext_ptr) - YY_MORE_ADJ == 1 ) 964 { 965 /* We matched a single character, the EOB, so 966 * treat this as a final EOF. 967 */ 968 return EOB_ACT_END_OF_FILE; 969 } 970 971 else 972 { 973 /* We matched some text prior to the EOB, first 974 * process it. 975 */ 976 return EOB_ACT_LAST_MATCH; 977 } 978 } 979 980 /* Try to read more data. */ 981 982 /* First move last chars to start of buffer. */ 983 number_to_move = (int) ((yy_c_buf_p) - (yytext_ptr)) - 1; 984 985 for ( i = 0; i < number_to_move; ++i ) 986 *(dest++) = *(source++); 987 988 if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING ) 989 /* don‘t do the read, it‘s not guaranteed to return an EOF, 990 * just force an EOF 991 */ 992 YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars) = 0; 993 994 else 995 { 996 int num_to_read = 997 YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1; 998 999 while ( num_to_read <= 0 ) 1000 { /* Not enough room in the buffer - grow it. */ 1001 1002 /* just a shorter name for the current buffer */ 1003 YY_BUFFER_STATE b = YY_CURRENT_BUFFER; 1004 1005 int yy_c_buf_p_offset = 1006 (int) ((yy_c_buf_p) - b->yy_ch_buf); 1007 1008 if ( b->yy_is_our_buffer ) 1009 { 1010 int new_size = b->yy_buf_size * 2; 1011 1012 if ( new_size <= 0 ) 1013 b->yy_buf_size += b->yy_buf_size / 8; 1014 else 1015 b->yy_buf_size *= 2; 1016 1017 b->yy_ch_buf = (char *) 1018 /* Include room in for 2 EOB chars. */ 1019 yyrealloc((void *) b->yy_ch_buf,b->yy_buf_size + 2 ); 1020 } 1021 else 1022 /* Can‘t grow it, we don‘t own it. */ 1023 b->yy_ch_buf = 0; 1024 1025 if ( ! b->yy_ch_buf ) 1026 YY_FATAL_ERROR( 1027 "fatal error - scanner input buffer overflow" ); 1028 1029 (yy_c_buf_p) = &b->yy_ch_buf[yy_c_buf_p_offset]; 1030 1031 num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size - 1032 number_to_move - 1; 1033 1034 } 1035 1036 if ( num_to_read > YY_READ_BUF_SIZE ) 1037 num_to_read = YY_READ_BUF_SIZE; 1038 1039 /* Read in more data. */ 1040 YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]), 1041 (yy_n_chars), (size_t) num_to_read ); 1042 1043 YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars); 1044 } 1045 1046 if ( (yy_n_chars) == 0 ) 1047 { 1048 if ( number_to_move == YY_MORE_ADJ ) 1049 { 1050 ret_val = EOB_ACT_END_OF_FILE; 1051 yyrestart(yyin ); 1052 } 1053 1054 else 1055 { 1056 ret_val = EOB_ACT_LAST_MATCH; 1057 YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = 1058 YY_BUFFER_EOF_PENDING; 1059 } 1060 } 1061 1062 else 1063 ret_val = EOB_ACT_CONTINUE_SCAN; 1064 1065 if ((yy_size_t) ((yy_n_chars) + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) { 1066 /* Extend the array by 50%, plus the number we really need. */ 1067 yy_size_t new_size = (yy_n_chars) + number_to_move + ((yy_n_chars) >> 1); 1068 YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) yyrealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,new_size ); 1069 if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf ) 1070 YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" ); 1071 } 1072 1073 (yy_n_chars) += number_to_move; 1074 YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] = YY_END_OF_BUFFER_CHAR; 1075 YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] = YY_END_OF_BUFFER_CHAR; 1076 1077 (yytext_ptr) = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0]; 1078 1079 return ret_val; 1080 } 1081 1082 /* yy_get_previous_state - get the state just before the EOB char was reached */ 1083 1084 static yy_state_type yy_get_previous_state (void) 1085 { 1086 register yy_state_type yy_current_state; 1087 register char *yy_cp; 1088 1089 yy_current_state = (yy_start); 1090 1091 for ( yy_cp = (yytext_ptr) + YY_MORE_ADJ; yy_cp < (yy_c_buf_p); ++yy_cp ) 1092 { 1093 register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1); 1094 if ( yy_accept[yy_current_state] ) 1095 { 1096 (yy_last_accepting_state) = yy_current_state; 1097 (yy_last_accepting_cpos) = yy_cp; 1098 } 1099 while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) 1100 { 1101 yy_current_state = (int) yy_def[yy_current_state]; 1102 if ( yy_current_state >= 20 ) 1103 yy_c = yy_meta[(unsigned int) yy_c]; 1104 } 1105 yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c]; 1106 } 1107 1108 return yy_current_state; 1109 } 1110 1111 /* yy_try_NUL_trans - try to make a transition on the NUL character 1112 * 1113 * synopsis 1114 * next_state = yy_try_NUL_trans( current_state ); 1115 */ 1116 static yy_state_type yy_try_NUL_trans (yy_state_type yy_current_state ) 1117 { 1118 register int yy_is_jam; 1119 register char *yy_cp = (yy_c_buf_p); 1120 1121 register YY_CHAR yy_c = 1; 1122 if ( yy_accept[yy_current_state] ) 1123 { 1124 (yy_last_accepting_state) = yy_current_state; 1125 (yy_last_accepting_cpos) = yy_cp; 1126 } 1127 while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) 1128 { 1129 yy_current_state = (int) yy_def[yy_current_state]; 1130 if ( yy_current_state >= 20 ) 1131 yy_c = yy_meta[(unsigned int) yy_c]; 1132 } 1133 yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c]; 1134 yy_is_jam = (yy_current_state == 19); 1135 1136 return yy_is_jam ? 0 : yy_current_state; 1137 } 1138 1139 static void yyunput (int c, register char * yy_bp ) 1140 { 1141 register char *yy_cp; 1142 1143 yy_cp = (yy_c_buf_p); 1144 1145 /* undo effects of setting up yytext */ 1146 *yy_cp = (yy_hold_char); 1147 1148 if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 ) 1149 { /* need to shift things up to make room */ 1150 /* +2 for EOB chars. */ 1151 register int number_to_move = (yy_n_chars) + 2; 1152 register char *dest = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[ 1153 YY_CURRENT_BUFFER_LVALUE->yy_buf_size + 2]; 1154 register char *source = 1155 &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]; 1156 1157 while ( source > YY_CURRENT_BUFFER_LVALUE->yy_ch_buf ) 1158 *--dest = *--source; 1159 1160 yy_cp += (int) (dest - source); 1161 yy_bp += (int) (dest - source); 1162 YY_CURRENT_BUFFER_LVALUE->yy_n_chars = 1163 (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_buf_size; 1164 1165 if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 ) 1166 YY_FATAL_ERROR( "flex scanner push-back overflow" ); 1167 } 1168 1169 *--yy_cp = (char) c; 1170 1171 (yytext_ptr) = yy_bp; 1172 (yy_hold_char) = *yy_cp; 1173 (yy_c_buf_p) = yy_cp; 1174 } 1175 1176 #ifndef YY_NO_INPUT 1177 #ifdef __cplusplus 1178 static int yyinput (void) 1179 #else 1180 static int input (void) 1181 #endif 1182 1183 { 1184 int c; 1185 1186 *(yy_c_buf_p) = (yy_hold_char); 1187 1188 if ( *(yy_c_buf_p) == YY_END_OF_BUFFER_CHAR ) 1189 { 1190 /* yy_c_buf_p now points to the character we want to return. 1191 * If this occurs *before* the EOB characters, then it‘s a 1192 * valid NUL; if not, then we‘ve hit the end of the buffer. 1193 */ 1194 if ( (yy_c_buf_p) < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] ) 1195 /* This was really a NUL. */ 1196 *(yy_c_buf_p) = ‘\0‘; 1197 1198 else 1199 { /* need more input */ 1200 int offset = (yy_c_buf_p) - (yytext_ptr); 1201 ++(yy_c_buf_p); 1202 1203 switch ( yy_get_next_buffer( ) ) 1204 { 1205 case EOB_ACT_LAST_MATCH: 1206 /* This happens because yy_g_n_b() 1207 * sees that we‘ve accumulated a 1208 * token and flags that we need to 1209 * try matching the token before 1210 * proceeding. But for input(), 1211 * there‘s no matching to consider. 1212 * So convert the EOB_ACT_LAST_MATCH 1213 * to EOB_ACT_END_OF_FILE. 1214 */ 1215 1216 /* Reset buffer status. */ 1217 yyrestart(yyin ); 1218 1219 /*FALLTHROUGH*/ 1220 1221 case EOB_ACT_END_OF_FILE: 1222 { 1223 if ( yywrap( ) ) 1224 return EOF; 1225 1226 if ( ! (yy_did_buffer_switch_on_eof) ) 1227 YY_NEW_FILE; 1228 #ifdef __cplusplus 1229 return yyinput(); 1230 #else 1231 return input(); 1232 #endif 1233 } 1234 1235 case EOB_ACT_CONTINUE_SCAN: 1236 (yy_c_buf_p) = (yytext_ptr) + offset; 1237 break; 1238 } 1239 } 1240 } 1241 1242 c = *(unsigned char *) (yy_c_buf_p); /* cast for 8-bit char‘s */ 1243 *(yy_c_buf_p) = ‘\0‘; /* preserve yytext */ 1244 (yy_hold_char) = *++(yy_c_buf_p); 1245 1246 return c; 1247 } 1248 #endif /* ifndef YY_NO_INPUT */ 1249 1250 /** Immediately switch to a different input stream. 1251 * @param input_file A readable stream. 1252 * 1253 * @note This function does not reset the start condition to @c INITIAL . 1254 */ 1255 void yyrestart (FILE * input_file ) 1256 { 1257 1258 if ( ! YY_CURRENT_BUFFER ){ 1259 yyensure_buffer_stack (); 1260 YY_CURRENT_BUFFER_LVALUE = 1261 yy_create_buffer(yyin,YY_BUF_SIZE ); 1262 } 1263 1264 yy_init_buffer(YY_CURRENT_BUFFER,input_file ); 1265 yy_load_buffer_state( ); 1266 } 1267 1268 /** Switch to a different input buffer. 1269 * @param new_buffer The new input buffer. 1270 * 1271 */ 1272 void yy_switch_to_buffer (YY_BUFFER_STATE new_buffer ) 1273 { 1274 1275 /* TODO. We should be able to replace this entire function body 1276 * with 1277 * yypop_buffer_state(); 1278 * yypush_buffer_state(new_buffer); 1279 */ 1280 yyensure_buffer_stack (); 1281 if ( YY_CURRENT_BUFFER == new_buffer ) 1282 return; 1283 1284 if ( YY_CURRENT_BUFFER ) 1285 { 1286 /* Flush out information for old buffer. */ 1287 *(yy_c_buf_p) = (yy_hold_char); 1288 YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p); 1289 YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars); 1290 } 1291 1292 YY_CURRENT_BUFFER_LVALUE = new_buffer; 1293 yy_load_buffer_state( ); 1294 1295 /* We don‘t actually know whether we did this switch during 1296 * EOF (yywrap()) processing, but the only time this flag 1297 * is looked at is after yywrap() is called, so it‘s safe 1298 * to go ahead and always set it. 1299 */ 1300 (yy_did_buffer_switch_on_eof) = 1; 1301 } 1302 1303 static void yy_load_buffer_state (void) 1304 { 1305 (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars; 1306 (yytext_ptr) = (yy_c_buf_p) = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos; 1307 yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file; 1308 (yy_hold_char) = *(yy_c_buf_p); 1309 } 1310 1311 /** Allocate and initialize an input buffer state. 1312 * @param file A readable stream. 1313 * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE. 1314 * 1315 * @return the allocated buffer state. 1316 */ 1317 YY_BUFFER_STATE yy_create_buffer (FILE * file, int size ) 1318 { 1319 YY_BUFFER_STATE b; 1320 1321 b = (YY_BUFFER_STATE) yyalloc(sizeof( struct yy_buffer_state ) ); 1322 if ( ! b ) 1323 YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" ); 1324 1325 b->yy_buf_size = size; 1326 1327 /* yy_ch_buf has to be 2 characters longer than the size given because 1328 * we need to put in 2 end-of-buffer characters. 1329 */ 1330 b->yy_ch_buf = (char *) yyalloc(b->yy_buf_size + 2 ); 1331 if ( ! b->yy_ch_buf ) 1332 YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" ); 1333 1334 b->yy_is_our_buffer = 1; 1335 1336 yy_init_buffer(b,file ); 1337 1338 return b; 1339 } 1340 1341 /** Destroy the buffer. 1342 * @param b a buffer created with yy_create_buffer() 1343 * 1344 */ 1345 void yy_delete_buffer (YY_BUFFER_STATE b ) 1346 { 1347 1348 if ( ! b ) 1349 return; 1350 1351 if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */ 1352 YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0; 1353 1354 if ( b->yy_is_our_buffer ) 1355 yyfree((void *) b->yy_ch_buf ); 1356 1357 yyfree((void *) b ); 1358 } 1359 1360 #ifndef __cplusplus 1361 extern int isatty (int ); 1362 #endif /* __cplusplus */ 1363 1364 /* Initializes or reinitializes a buffer. 1365 * This function is sometimes called more than once on the same buffer, 1366 * such as during a yyrestart() or at EOF. 1367 */ 1368 static void yy_init_buffer (YY_BUFFER_STATE b, FILE * file ) 1369 1370 { 1371 int oerrno = errno; 1372 1373 yy_flush_buffer(b ); 1374 1375 b->yy_input_file = file; 1376 b->yy_fill_buffer = 1; 1377 1378 /* If b is the current buffer, then yy_init_buffer was _probably_ 1379 * called from yyrestart() or through yy_get_next_buffer. 1380 * In that case, we don‘t want to reset the lineno or column. 1381 */ 1382 if (b != YY_CURRENT_BUFFER){ 1383 b->yy_bs_lineno = 1; 1384 b->yy_bs_column = 0; 1385 } 1386 1387 b->yy_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0; 1388 1389 errno = oerrno; 1390 } 1391 1392 /** Discard all buffered characters. On the next scan, YY_INPUT will be called. 1393 * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER. 1394 * 1395 */ 1396 void yy_flush_buffer (YY_BUFFER_STATE b ) 1397 { 1398 if ( ! b ) 1399 return; 1400 1401 b->yy_n_chars = 0; 1402 1403 /* We always need two end-of-buffer characters. The first causes 1404 * a transition to the end-of-buffer state. The second causes 1405 * a jam in that state. 1406 */ 1407 b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR; 1408 b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR; 1409 1410 b->yy_buf_pos = &b->yy_ch_buf[0]; 1411 1412 b->yy_at_bol = 1; 1413 b->yy_buffer_status = YY_BUFFER_NEW; 1414 1415 if ( b == YY_CURRENT_BUFFER ) 1416 yy_load_buffer_state( ); 1417 } 1418 1419 /** Pushes the new state onto the stack. The new state becomes 1420 * the current state. This function will allocate the stack 1421 * if necessary. 1422 * @param new_buffer The new state. 1423 * 1424 */ 1425 void yypush_buffer_state (YY_BUFFER_STATE new_buffer ) 1426 { 1427 if (new_buffer == NULL) 1428 return; 1429 1430 yyensure_buffer_stack(); 1431 1432 /* This block is copied from yy_switch_to_buffer. */ 1433 if ( YY_CURRENT_BUFFER ) 1434 { 1435 /* Flush out information for old buffer. */ 1436 *(yy_c_buf_p) = (yy_hold_char); 1437 YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p); 1438 YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars); 1439 } 1440 1441 /* Only push if top exists. Otherwise, replace top. */ 1442 if (YY_CURRENT_BUFFER) 1443 (yy_buffer_stack_top)++; 1444 YY_CURRENT_BUFFER_LVALUE = new_buffer; 1445 1446 /* copied from yy_switch_to_buffer. */ 1447 yy_load_buffer_state( ); 1448 (yy_did_buffer_switch_on_eof) = 1; 1449 } 1450 1451 /** Removes and deletes the top of the stack, if present. 1452 * The next element becomes the new top. 1453 * 1454 */ 1455 void yypop_buffer_state (void) 1456 { 1457 if (!YY_CURRENT_BUFFER) 1458 return; 1459 1460 yy_delete_buffer(YY_CURRENT_BUFFER ); 1461 YY_CURRENT_BUFFER_LVALUE = NULL; 1462 if ((yy_buffer_stack_top) > 0) 1463 --(yy_buffer_stack_top); 1464 1465 if (YY_CURRENT_BUFFER) { 1466 yy_load_buffer_state( ); 1467 (yy_did_buffer_switch_on_eof) = 1; 1468 } 1469 } 1470 1471 /* Allocates the stack if it does not exist. 1472 * Guarantees space for at least one push. 1473 */ 1474 static void yyensure_buffer_stack (void) 1475 { 1476 int num_to_alloc; 1477 1478 if (!(yy_buffer_stack)) { 1479 1480 /* First allocation is just for 2 elements, since we don‘t know if this 1481 * scanner will even need a stack. We use 2 instead of 1 to avoid an 1482 * immediate realloc on the next call. 1483 */ 1484 num_to_alloc = 1; 1485 (yy_buffer_stack) = (struct yy_buffer_state**)yyalloc 1486 (num_to_alloc * sizeof(struct yy_buffer_state*) 1487 ); 1488 if ( ! (yy_buffer_stack) ) 1489 YY_FATAL_ERROR( "out of dynamic memory in yyensure_buffer_stack()" ); 1490 1491 memset((yy_buffer_stack), 0, num_to_alloc * sizeof(struct yy_buffer_state*)); 1492 1493 (yy_buffer_stack_max) = num_to_alloc; 1494 (yy_buffer_stack_top) = 0; 1495 return; 1496 } 1497 1498 if ((yy_buffer_stack_top) >= ((yy_buffer_stack_max)) - 1){ 1499 1500 /* Increase the buffer to prepare for a possible push. */ 1501 int grow_size = 8 /* arbitrary grow size */; 1502 1503 num_to_alloc = (yy_buffer_stack_max) + grow_size; 1504 (yy_buffer_stack) = (struct yy_buffer_state**)yyrealloc 1505 ((yy_buffer_stack), 1506 num_to_alloc * sizeof(struct yy_buffer_state*) 1507 ); 1508 if ( ! (yy_buffer_stack) ) 1509 YY_FATAL_ERROR( "out of dynamic memory in yyensure_buffer_stack()" ); 1510 1511 /* zero only the new slots.*/ 1512 memset((yy_buffer_stack) + (yy_buffer_stack_max), 0, grow_size * sizeof(struct yy_buffer_state*)); 1513 (yy_buffer_stack_max) = num_to_alloc; 1514 } 1515 } 1516 1517 /** Setup the input buffer state to scan directly from a user-specified character buffer. 1518 * @param base the character buffer 1519 * @param size the size in bytes of the character buffer 1520 * 1521 * @return the newly allocated buffer state object. 1522 */ 1523 YY_BUFFER_STATE yy_scan_buffer (char * base, yy_size_t size ) 1524 { 1525 YY_BUFFER_STATE b; 1526 1527 if ( size < 2 || 1528 base[size-2] != YY_END_OF_BUFFER_CHAR || 1529 base[size-1] != YY_END_OF_BUFFER_CHAR ) 1530 /* They forgot to leave room for the EOB‘s. */ 1531 return 0; 1532 1533 b = (YY_BUFFER_STATE) yyalloc(sizeof( struct yy_buffer_state ) ); 1534 if ( ! b ) 1535 YY_FATAL_ERROR( "out of dynamic memory in yy_scan_buffer()" ); 1536 1537 b->yy_buf_size = size - 2; /* "- 2" to take care of EOB‘s */ 1538 b->yy_buf_pos = b->yy_ch_buf = base; 1539 b->yy_is_our_buffer = 0; 1540 b->yy_input_file = 0; 1541 b->yy_n_chars = b->yy_buf_size; 1542 b->yy_is_interactive = 0; 1543 b->yy_at_bol = 1; 1544 b->yy_fill_buffer = 0; 1545 b->yy_buffer_status = YY_BUFFER_NEW; 1546 1547 yy_switch_to_buffer(b ); 1548 1549 return b; 1550 } 1551 1552 /** Setup the input buffer state to scan a string. The next call to yylex() will 1553 * scan from a @e copy of @a str. 1554 * @param yystr a NUL-terminated string to scan 1555 * 1556 * @return the newly allocated buffer state object. 1557 * @note If you want to scan bytes that may contain NUL values, then use 1558 * yy_scan_bytes() instead. 1559 */ 1560 YY_BUFFER_STATE yy_scan_string (yyconst char * yystr ) 1561 { 1562 1563 return yy_scan_bytes(yystr,strlen(yystr) ); 1564 } 1565 1566 /** Setup the input buffer state to scan the given bytes. The next call to yylex() will 1567 * scan from a @e copy of @a bytes. 1568 * @param yybytes the byte buffer to scan 1569 * @param _yybytes_len the number of bytes in the buffer pointed to by @a bytes. 1570 * 1571 * @return the newly allocated buffer state object. 1572 */ 1573 YY_BUFFER_STATE yy_scan_bytes (yyconst char * yybytes, int _yybytes_len ) 1574 { 1575 YY_BUFFER_STATE b; 1576 char *buf; 1577 yy_size_t n; 1578 int i; 1579 1580 /* Get memory for full buffer, including space for trailing EOB‘s. */ 1581 n = _yybytes_len + 2; 1582 buf = (char *) yyalloc(n ); 1583 if ( ! buf ) 1584 YY_FATAL_ERROR( "out of dynamic memory in yy_scan_bytes()" ); 1585 1586 for ( i = 0; i < _yybytes_len; ++i ) 1587 buf[i] = yybytes[i]; 1588 1589 buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR; 1590 1591 b = yy_scan_buffer(buf,n ); 1592 if ( ! b ) 1593 YY_FATAL_ERROR( "bad buffer in yy_scan_bytes()" ); 1594 1595 /* It‘s okay to grow etc. this buffer, and we should throw it 1596 * away when we‘re done. 1597 */ 1598 b->yy_is_our_buffer = 1; 1599 1600 return b; 1601 } 1602 1603 #ifndef YY_EXIT_FAILURE 1604 #define YY_EXIT_FAILURE 2 1605 #endif 1606 1607 static void yy_fatal_error (yyconst char* msg ) 1608 { 1609 (void) fprintf( stderr, "%s\n", msg ); 1610 exit( YY_EXIT_FAILURE ); 1611 } 1612 1613 /* Redefine yyless() so it works in section 3 code. */ 1614 1615 #undef yyless 1616 #define yyless(n) 1617 do 1618 { 1619 /* Undo effects of setting up yytext. */ 1620 int yyless_macro_arg = (n); 1621 YY_LESS_LINENO(yyless_macro_arg);1622 yytext[yyleng] = (yy_hold_char); 1623 (yy_c_buf_p) = yytext + yyless_macro_arg; 1624 (yy_hold_char) = *(yy_c_buf_p); 1625 *(yy_c_buf_p) = ‘\0‘; 1626 yyleng = yyless_macro_arg; 1627 } 1628 while ( 0 ) 1629 1630 /* Accessor methods (get/set functions) to struct members. */ 1631 1632 /** Get the current line number. 1633 * 1634 */ 1635 int yyget_lineno (void) 1636 { 1637 1638 return yylineno; 1639 } 1640 1641 /** Get the input stream. 1642 * 1643 */ 1644 FILE *yyget_in (void) 1645 { 1646 return yyin; 1647 } 1648 1649 /** Get the output stream. 1650 * 1651 */ 1652 FILE *yyget_out (void) 1653 { 1654 return yyout; 1655 } 1656 1657 /** Get the length of the current token. 1658 * 1659 */ 1660 int yyget_leng (void) 1661 { 1662 return yyleng; 1663 } 1664 1665 /** Get the current token. 1666 * 1667 */ 1668 1669 char *yyget_text (void) 1670 { 1671 return yytext; 1672 } 1673 1674 /** Set the current line number. 1675 * @param line_number 1676 * 1677 */ 1678 void yyset_lineno (int line_number ) 1679 { 1680 1681 yylineno = line_number; 1682 } 1683 1684 /** Set the input stream. This does not discard the current 1685 * input buffer. 1686 * @param in_str A readable stream. 1687 * 1688 * @see yy_switch_to_buffer 1689 */ 1690 void yyset_in (FILE * in_str ) 1691 { 1692 yyin = in_str ; 1693 } 1694 1695 void yyset_out (FILE * out_str ) 1696 { 1697 yyout = out_str ; 1698 } 1699 1700 int yyget_debug (void) 1701 { 1702 return yy_flex_debug; 1703 } 1704 1705 void yyset_debug (int bdebug ) 1706 { 1707 yy_flex_debug = bdebug ; 1708 } 1709 1710 static int yy_init_globals (void) 1711 { 1712 /* Initialization is the same as for the non-reentrant scanner. 1713 * This function is called from yylex_destroy(), so don‘t allocate here. 1714 */ 1715 1716 (yy_buffer_stack) = 0; 1717 (yy_buffer_stack_top) = 0; 1718 (yy_buffer_stack_max) = 0; 1719 (yy_c_buf_p) = (char *) 0; 1720 (yy_init) = 0; 1721 (yy_start) = 0; 1722 1723 /* Defined in main.c */ 1724 #ifdef YY_STDINIT 1725 yyin = stdin; 1726 yyout = stdout; 1727 #else 1728 yyin = (FILE *) 0; 1729 yyout = (FILE *) 0; 1730 #endif 1731 1732 /* For future reference: Set errno on error, since we are called by 1733 * yylex_init() 1734 */ 1735 return 0; 1736 } 1737 1738 /* yylex_destroy is for both reentrant and non-reentrant scanners. */ 1739 int yylex_destroy (void) 1740 { 1741 1742 /* Pop the buffer stack, destroying each element. */ 1743 while(YY_CURRENT_BUFFER){ 1744 yy_delete_buffer(YY_CURRENT_BUFFER ); 1745 YY_CURRENT_BUFFER_LVALUE = NULL; 1746 yypop_buffer_state(); 1747 } 1748 1749 /* Destroy the stack itself. */ 1750 yyfree((yy_buffer_stack) ); 1751 (yy_buffer_stack) = NULL; 1752 1753 /* Reset the globals. This is important in a non-reentrant scanner so the next time 1754 * yylex() is called, initialization will occur. */ 1755 yy_init_globals( ); 1756 1757 return 0; 1758 } 1759 1760 /* 1761 * Internal utility routines. 1762 */ 1763 1764 #ifndef yytext_ptr 1765 static void yy_flex_strncpy (char* s1, yyconst char * s2, int n ) 1766 { 1767 register int i; 1768 for ( i = 0; i < n; ++i ) 1769 s1[i] = s2[i]; 1770 } 1771 #endif 1772 1773 #ifdef YY_NEED_STRLEN 1774 static int yy_flex_strlen (yyconst char * s ) 1775 { 1776 register int n; 1777 for ( n = 0; s[n]; ++n ) 1778 ; 1779 1780 return n; 1781 } 1782 #endif 1783 1784 void *yyalloc (yy_size_t size ) 1785 { 1786 return (void *) malloc( size ); 1787 } 1788 1789 void *yyrealloc (void * ptr, yy_size_t size ) 1790 { 1791 /* The cast to (char *) in the following accommodates both 1792 * implementations that use char* generic pointers, and those 1793 * that use void* generic pointers. It works with the latter 1794 * because both ANSI C and C++ allow castless assignment from 1795 * any pointer type to void*, and deal with argument conversions 1796 * as though doing an assignment. 1797 */ 1798 return (void *) realloc( (char *) ptr, size ); 1799 } 1800 1801 void yyfree (void * ptr ) 1802 { 1803 free( (char *) ptr ); /* see yyrealloc() for (char *) cast */ 1804 } 1805 1806 #define YYTABLES_NAME "yytables" 1807 1808 #line 29 "mycalc.l"
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原文地址：http://www.cnblogs.com/zinthos/p/4188671.html
