gcc/cexp.c

   1
   2 /*  A Bison parser, made from cexp.y
   3  by  GNU Bison version 1.25
   4   */
   5
   6 #define YYBISON 1  /* Identify Bison output.  */
   7
   8 #define INT     258
   9 #define CHAR    259
  10 #define NAME    260
  11 #define ERROR   261
  12 #define OR      262
  13 #define AND     263
  14 #define EQUAL   264
  15 #define NOTEQUAL        265
  16 #define LEQ     266
  17 #define GEQ     267
  18 #define LSH     268
  19 #define RSH     269
  20 #define UNARY   270
  21
  22 #line 27 "cexp.y"
  23
  24 #include "config.h"
  25
  26 #include "system.h"
  27 #include "intl.h"
  28 #include <setjmp.h>
  29 /* #define YYDEBUG 1 */
  30
  31 #ifdef MULTIBYTE_CHARS
  32 #include "mbchar.h"
  33 #include <locale.h>
  34 #endif /* MULTIBYTE_CHARS */
  35
  36 typedef unsigned char U_CHAR;
  37
  38 /* This is used for communicating lists of keywords with cccp.c.  */
  39 struct arglist {
  40   struct arglist *next;
  41   U_CHAR *name;
  42   int length;
  43   int argno;
  44 };
  45
  46 HOST_WIDEST_INT parse_c_expression PROTO((char *, int));
  47
  48 static int yylex PROTO((void));
  49 static void yyerror PVPROTO((const char *, ...))
  50   ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  51 static HOST_WIDEST_INT expression_value;
  52 #ifdef TEST_EXP_READER
  53 static int expression_signedp;
  54 #endif
  55
  56 static jmp_buf parse_return_error;
  57
  58 /* Nonzero means count most punctuation as part of a name.  */
  59 static int keyword_parsing = 0;
  60
  61 /* Nonzero means do not evaluate this expression.
  62    This is a count, since unevaluated expressions can nest.  */
  63 static int skip_evaluation;
  64
  65 /* Nonzero means warn if undefined identifiers are evaluated.  */
  66 static int warn_undef;
  67
  68 /* some external tables of character types */
  69 extern unsigned char is_idstart[], is_idchar[], is_space[];
  70
  71 /* Flag for -pedantic.  */
  72 extern int pedantic;
  73
  74 /* Flag for -traditional.  */
  75 extern int traditional;
  76
  77 /* Flag for -lang-c89.  */
  78 extern int c89;
  79
  80 #ifndef CHAR_TYPE_SIZE
  81 #define CHAR_TYPE_SIZE BITS_PER_UNIT
  82 #endif
  83
  84 #ifndef INT_TYPE_SIZE
  85 #define INT_TYPE_SIZE BITS_PER_WORD
  86 #endif
  87
  88 #ifndef LONG_TYPE_SIZE
  89 #define LONG_TYPE_SIZE BITS_PER_WORD
  90 #endif
  91
  92 #ifndef WCHAR_TYPE_SIZE
  93 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
  94 #endif
  95
  96 #ifndef MAX_CHAR_TYPE_SIZE
  97 #define MAX_CHAR_TYPE_SIZE CHAR_TYPE_SIZE
  98 #endif
  99
 100 #ifndef MAX_INT_TYPE_SIZE
 101 #define MAX_INT_TYPE_SIZE INT_TYPE_SIZE
 102 #endif
 103
 104 #ifndef MAX_LONG_TYPE_SIZE
 105 #define MAX_LONG_TYPE_SIZE LONG_TYPE_SIZE
 106 #endif
 107
 108 #ifndef MAX_WCHAR_TYPE_SIZE
 109 #define MAX_WCHAR_TYPE_SIZE WCHAR_TYPE_SIZE
 110 #endif
 111
 112 #define MAX_CHAR_TYPE_MASK (MAX_CHAR_TYPE_SIZE < HOST_BITS_PER_WIDEST_INT \
 113                             ? (~ (~ (HOST_WIDEST_INT) 0 << MAX_CHAR_TYPE_SIZE)) \
 114                             : ~ (HOST_WIDEST_INT) 0)
 115
 116 #define MAX_WCHAR_TYPE_MASK (MAX_WCHAR_TYPE_SIZE < HOST_BITS_PER_WIDEST_INT \
 117                              ? ~ (~ (HOST_WIDEST_INT) 0 << MAX_WCHAR_TYPE_SIZE) \
 118                              : ~ (HOST_WIDEST_INT) 0)
 119
 120 /* Suppose A1 + B1 = SUM1, using 2's complement arithmetic ignoring overflow.
 121    Suppose A, B and SUM have the same respective signs as A1, B1, and SUM1.
 122    Suppose SIGNEDP is negative if the result is signed, zero if unsigned.
 123    Then this yields nonzero if overflow occurred during the addition.
 124    Overflow occurs if A and B have the same sign, but A and SUM differ in sign,
 125    and SIGNEDP is negative.
 126    Use `^' to test whether signs differ, and `< 0' to isolate the sign.  */
 127 #define overflow_sum_sign(a, b, sum, signedp) \
 128         ((~((a) ^ (b)) & ((a) ^ (sum)) & (signedp)) < 0)
 129
 130 struct constant;
 131
 132 HOST_WIDEST_INT parse_escape PROTO((char **, HOST_WIDEST_INT));
 133 int check_assertion PROTO((U_CHAR *, int, int, struct arglist *));
 134 struct hashnode *lookup PROTO((U_CHAR *, int, int));
 135 void error PVPROTO((const char *, ...)) ATTRIBUTE_PRINTF_1;
 136 void verror PROTO((const char *, va_list));
 137 void pedwarn PVPROTO((const char *, ...)) ATTRIBUTE_PRINTF_1;
 138 void warning PVPROTO((const char *, ...)) ATTRIBUTE_PRINTF_1;
 139
 140 static int parse_number PROTO((int));
 141 static HOST_WIDEST_INT left_shift PROTO((struct constant *, unsigned HOST_WIDEST_INT));
 142 static HOST_WIDEST_INT right_shift PROTO((struct constant *, unsigned HOST_WIDEST_INT));
 143 static void integer_overflow PROTO((void));
 144
 145 /* `signedp' values */
 146 #define SIGNED (~0)
 147 #define UNSIGNED 0
 148
 149 #line 154 "cexp.y"
 150 typedef union {
 151   struct constant {HOST_WIDEST_INT value; int signedp;} integer;
 152   struct name {U_CHAR *address; int length;} name;
 153   struct arglist *keywords;
 154 } YYSTYPE;
 155 #include <stdio.h>
 156
 157 #ifndef __cplusplus
 158 #ifndef __STDC__
 159 #define const
 160 #endif
 161 #endif
 162
 163
 164
 165 #define YYFINAL         77
 166 #define YYFLAG          -32768
 167 #define YYNTBASE        34
 168
 169 #define YYTRANSLATE(x) ((unsigned)(x) <= 270 ? yytranslate[x] : 43)
 170
 171 static const char yytranslate[] = {     0,
 172      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 173      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 174      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 175      2,     2,    29,     2,    31,     2,    27,    14,     2,    32,
 176     33,    25,    23,     9,    24,     2,    26,     2,     2,     2,
 177      2,     2,     2,     2,     2,     2,     2,     8,     2,    17,
 178      2,    18,     7,     2,     2,     2,     2,     2,     2,     2,
 179      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 180      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 181      2,     2,     2,    13,     2,     2,     2,     2,     2,     2,
 182      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 183      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 184      2,     2,     2,    12,     2,    30,     2,     2,     2,     2,
 185      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 186      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 187      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 188      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 189      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 190      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 191      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 192      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 193      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 194      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 195      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 196      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 197      2,     2,     2,     2,     2,     1,     2,     3,     4,     5,
 198      6,    10,    11,    15,    16,    19,    20,    21,    22,    28
 199 };
 200
 201 #if YYDEBUG != 0
 202 static const short yyprhs[] = {     0,
 203      0,     2,     4,     8,    11,    14,    17,    20,    23,    24,
 204     31,    35,    39,    43,    47,    51,    55,    59,    63,    67,
 205     71,    75,    79,    83,    87,    91,    95,    99,   100,   105,
 206    106,   111,   112,   113,   121,   123,   125,   127,   128,   133
 207 };
 208
 209 static const short yyrhs[] = {    35,
 210      0,    36,     0,    35,     9,    36,     0,    24,    36,     0,
 211     29,    36,     0,    23,    36,     0,    30,    36,     0,    31,
 212      5,     0,     0,    31,     5,    37,    32,    42,    33,     0,
 213     32,    35,    33,     0,    36,    25,    36,     0,    36,    26,
 214     36,     0,    36,    27,    36,     0,    36,    23,    36,     0,
 215     36,    24,    36,     0,    36,    21,    36,     0,    36,    22,
 216     36,     0,    36,    15,    36,     0,    36,    16,    36,     0,
 217     36,    19,    36,     0,    36,    20,    36,     0,    36,    17,
 218     36,     0,    36,    18,    36,     0,    36,    14,    36,     0,
 219     36,    13,    36,     0,    36,    12,    36,     0,     0,    36,
 220     11,    38,    36,     0,     0,    36,    10,    39,    36,     0,
 221      0,     0,    36,     7,    40,    36,     8,    41,    36,     0,
 222      3,     0,     4,     0,     5,     0,     0,    32,    42,    33,
 223     42,     0,     5,    42,     0
 224 };
 225
 226 #endif
 227
 228 #if YYDEBUG != 0
 229 static const short yyrline[] = { 0,
 230    184,   194,   195,   202,   207,   210,   212,   215,   219,   221,
 231    226,   231,   244,   261,   274,   280,   286,   292,   298,   301,
 232    304,   311,   318,   325,   332,   335,   338,   341,   344,   347,
 233    350,   353,   355,   358,   361,   363,   365,   373,   375,   388
 234 };
 235 #endif
 236
 237
 238 #if YYDEBUG != 0 || defined (YYERROR_VERBOSE)
 239
 240 static const char * const yytname[] = {   "$","error","$undefined.","INT","CHAR",
 241 "NAME","ERROR","'?'","':'","','","OR","AND","'|'","'^'","'&'","EQUAL","NOTEQUAL",
 242 "'<'","'>'","LEQ","GEQ","LSH","RSH","'+'","'-'","'*'","'/'","'%'","UNARY","'!'",
 243 "'~'","'#'","'('","')'","start","exp1","exp","@1","@2","@3","@4","@5","keywords", NULL
 244 };
 245 #endif
 246
 247 static const short yyr1[] = {     0,
 248     34,    35,    35,    36,    36,    36,    36,    36,    37,    36,
 249     36,    36,    36,    36,    36,    36,    36,    36,    36,    36,
 250     36,    36,    36,    36,    36,    36,    36,    38,    36,    39,
 251     36,    40,    41,    36,    36,    36,    36,    42,    42,    42
 252 };
 253
 254 static const short yyr2[] = {     0,
 255      1,     1,     3,     2,     2,     2,     2,     2,     0,     6,
 256      3,     3,     3,     3,     3,     3,     3,     3,     3,     3,
 257      3,     3,     3,     3,     3,     3,     3,     0,     4,     0,
 258      4,     0,     0,     7,     1,     1,     1,     0,     4,     2
 259 };
 260
 261 static const short yydefact[] = {     0,
 262     35,    36,    37,     0,     0,     0,     0,     0,     0,     1,
 263      2,     6,     4,     5,     7,     8,     0,     0,    32,    30,
 264     28,     0,     0,     0,     0,     0,     0,     0,     0,     0,
 265      0,     0,     0,     0,     0,     0,     0,     0,    11,     3,
 266      0,     0,     0,    27,    26,    25,    19,    20,    23,    24,
 267     21,    22,    17,    18,    15,    16,    12,    13,    14,    38,
 268      0,    31,    29,    38,    38,     0,    33,    40,     0,    10,
 269      0,    38,    34,    39,     0,     0,     0
 270 };
 271
 272 static const short yydefgoto[] = {    75,
 273     10,    11,    38,    43,    42,    41,    71,    66
 274 };
 275
 276 static const short yypact[] = {    12,
 277 -32768,-32768,-32768,    12,    12,    12,    12,     1,    12,     4,
 278     79,-32768,-32768,-32768,-32768,   -21,    31,    12,-32768,-32768,
 279 -32768,    12,    12,    12,    12,    12,    12,    12,    12,    12,
 280     12,    12,    12,    12,    12,    12,    12,    30,-32768,    79,
 281     12,    12,    12,   110,   124,   137,   148,   148,   155,   155,
 282    155,   155,   160,   160,   -17,   -17,-32768,-32768,-32768,     2,
 283     58,    34,    95,     2,     2,    54,-32768,-32768,    55,-32768,
 284     12,     2,    79,-32768,    63,   188,-32768
 285 };
 286
 287 static const short yypgoto[] = {-32768,
 288    180,    -4,-32768,-32768,-32768,-32768,-32768,   -60
 289 };
 290
 291
 292 #define YYLAST          189
 293
 294
 295 static const short yytable[] = {    12,
 296     13,    14,    15,    68,    69,    16,    64,    35,    36,    37,
 297     -9,    74,    18,    40,     1,     2,     3,    44,    45,    46,
 298     47,    48,    49,    50,    51,    52,    53,    54,    55,    56,
 299     57,    58,    59,    65,     4,     5,    61,    62,    63,    18,
 300      6,     7,     8,     9,    21,    22,    23,    24,    25,    26,
 301     27,    28,    29,    30,    31,    32,    33,    34,    35,    36,
 302     37,    60,    76,    39,    19,    67,    73,    20,    21,    22,
 303     23,    24,    25,    26,    27,    28,    29,    30,    31,    32,
 304     33,    34,    35,    36,    37,    19,    70,    72,    20,    21,
 305     22,    23,    24,    25,    26,    27,    28,    29,    30,    31,
 306     32,    33,    34,    35,    36,    37,    22,    23,    24,    25,
 307     26,    27,    28,    29,    30,    31,    32,    33,    34,    35,
 308     36,    37,    23,    24,    25,    26,    27,    28,    29,    30,
 309     31,    32,    33,    34,    35,    36,    37,    24,    25,    26,
 310     27,    28,    29,    30,    31,    32,    33,    34,    35,    36,
 311     37,    25,    26,    27,    28,    29,    30,    31,    32,    33,
 312     34,    35,    36,    37,    27,    28,    29,    30,    31,    32,
 313     33,    34,    35,    36,    37,    31,    32,    33,    34,    35,
 314     36,    37,    33,    34,    35,    36,    37,    77,    17
 315 };
 316
 317 static const short yycheck[] = {     4,
 318      5,     6,     7,    64,    65,     5,     5,    25,    26,    27,
 319     32,    72,     9,    18,     3,     4,     5,    22,    23,    24,
 320     25,    26,    27,    28,    29,    30,    31,    32,    33,    34,
 321     35,    36,    37,    32,    23,    24,    41,    42,    43,     9,
 322     29,    30,    31,    32,    11,    12,    13,    14,    15,    16,
 323     17,    18,    19,    20,    21,    22,    23,    24,    25,    26,
 324     27,    32,     0,    33,     7,     8,    71,    10,    11,    12,
 325     13,    14,    15,    16,    17,    18,    19,    20,    21,    22,
 326     23,    24,    25,    26,    27,     7,    33,    33,    10,    11,
 327     12,    13,    14,    15,    16,    17,    18,    19,    20,    21,
 328     22,    23,    24,    25,    26,    27,    12,    13,    14,    15,
 329     16,    17,    18,    19,    20,    21,    22,    23,    24,    25,
 330     26,    27,    13,    14,    15,    16,    17,    18,    19,    20,
 331     21,    22,    23,    24,    25,    26,    27,    14,    15,    16,
 332     17,    18,    19,    20,    21,    22,    23,    24,    25,    26,
 333     27,    15,    16,    17,    18,    19,    20,    21,    22,    23,
 334     24,    25,    26,    27,    17,    18,    19,    20,    21,    22,
 335     23,    24,    25,    26,    27,    21,    22,    23,    24,    25,
 336     26,    27,    23,    24,    25,    26,    27,     0,     9
 337 };
 338 /* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
 339 #line 3 "/tmp/sky/share/bison.simple"
 340
 341 /* Skeleton output parser for bison,
 342    Copyright (C) 1984, 1989, 1990 Free Software Foundation, Inc.
 343
 344    This program is free software; you can redistribute it and/or modify
 345    it under the terms of the GNU General Public License as published by
 346    the Free Software Foundation; either version 2, or (at your option)
 347    any later version.
 348
 349    This program is distributed in the hope that it will be useful,
 350    but WITHOUT ANY WARRANTY; without even the implied warranty of
 351    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 352    GNU General Public License for more details.
 353
 354    You should have received a copy of the GNU General Public License
 355    along with this program; if not, write to the Free Software
 356    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 357
 358 /* As a special exception, when this file is copied by Bison into a
 359    Bison output file, you may use that output file without restriction.
 360    This special exception was added by the Free Software Foundation
 361    in version 1.24 of Bison.  */
 362
 363 #ifndef alloca
 364 #ifdef __GNUC__
 365 #define alloca __builtin_alloca
 366 #else /* not GNU C.  */
 367 #if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi)
 368 #include <alloca.h>
 369 #else /* not sparc */
 370 #if defined (MSDOS) && !defined (__TURBOC__)
 371 #include <malloc.h>
 372 #else /* not MSDOS, or __TURBOC__ */
 373 #if defined(_AIX)
 374 #include <malloc.h>
 375  #pragma alloca
 376 #else /* not MSDOS, __TURBOC__, or _AIX */
 377 #ifdef __hpux
 378 #ifdef __cplusplus
 379 extern "C" {
 380 void *alloca (unsigned int);
 381 };
 382 #else /* not __cplusplus */
 383 void *alloca ();
 384 #endif /* not __cplusplus */
 385 #endif /* __hpux */
 386 #endif /* not _AIX */
 387 #endif /* not MSDOS, or __TURBOC__ */
 388 #endif /* not sparc.  */
 389 #endif /* not GNU C.  */
 390 #endif /* alloca not defined.  */
 391
 392 /* This is the parser code that is written into each bison parser
 393   when the %semantic_parser declaration is not specified in the grammar.
 394   It was written by Richard Stallman by simplifying the hairy parser
 395   used when %semantic_parser is specified.  */
 396
 397 /* Note: there must be only one dollar sign in this file.
 398    It is replaced by the list of actions, each action
 399    as one case of the switch.  */
 400
 401 #define yyerrok         (yyerrstatus = 0)
 402 #define yyclearin       (yychar = YYEMPTY)
 403 #define YYEMPTY         -2
 404 #define YYEOF           0
 405 #define YYACCEPT        return(0)
 406 #define YYABORT         return(1)
 407 #define YYERROR         goto yyerrlab1
 408 /* Like YYERROR except do call yyerror.
 409    This remains here temporarily to ease the
 410    transition to the new meaning of YYERROR, for GCC.
 411    Once GCC version 2 has supplanted version 1, this can go.  */
 412 #define YYFAIL          goto yyerrlab
 413 #define YYRECOVERING()  (!!yyerrstatus)
 414 #define YYBACKUP(token, value) \
 415 do                                                              \
 416   if (yychar == YYEMPTY && yylen == 1)                          \
 417     { yychar = (token), yylval = (value);                       \
 418       yychar1 = YYTRANSLATE (yychar);                           \
 419       YYPOPSTACK;                                               \
 420       goto yybackup;                                            \
 421     }                                                           \
 422   else                                                          \
 423     { yyerror ("syntax error: cannot back up"); YYERROR; }      \
 424 while (0)
 425
 426 #define YYTERROR        1
 427 #define YYERRCODE       256
 428
 429 #ifndef YYPURE
 430 #define YYLEX           yylex()
 431 #endif
 432
 433 #ifdef YYPURE
 434 #ifdef YYLSP_NEEDED
 435 #ifdef YYLEX_PARAM
 436 #define YYLEX           yylex(&yylval, &yylloc, YYLEX_PARAM)
 437 #else
 438 #define YYLEX           yylex(&yylval, &yylloc)
 439 #endif
 440 #else /* not YYLSP_NEEDED */
 441 #ifdef YYLEX_PARAM
 442 #define YYLEX           yylex(&yylval, YYLEX_PARAM)
 443 #else
 444 #define YYLEX           yylex(&yylval)
 445 #endif
 446 #endif /* not YYLSP_NEEDED */
 447 #endif
 448
 449 /* If nonreentrant, generate the variables here */
 450
 451 #ifndef YYPURE
 452
 453 int     yychar;                 /*  the lookahead symbol                */
 454 YYSTYPE yylval;                 /*  the semantic value of the           */
 455                                 /*  lookahead symbol                    */
 456
 457 #ifdef YYLSP_NEEDED
 458 YYLTYPE yylloc;                 /*  location data for the lookahead     */
 459                                 /*  symbol                              */
 460 #endif
 461
 462 int yynerrs;                    /*  number of parse errors so far       */
 463 #endif  /* not YYPURE */
 464
 465 #if YYDEBUG != 0
 466 int yydebug;                    /*  nonzero means print parse trace     */
 467 /* Since this is uninitialized, it does not stop multiple parsers
 468    from coexisting.  */
 469 #endif
 470
 471 /*  YYINITDEPTH indicates the initial size of the parser's stacks       */
 472
 473 #ifndef YYINITDEPTH
 474 #define YYINITDEPTH 200
 475 #endif
 476
 477 /*  YYMAXDEPTH is the maximum size the stacks can grow to
 478     (effective only if the built-in stack extension method is used).  */
 479
 480 #if YYMAXDEPTH == 0
 481 #undef YYMAXDEPTH
 482 #endif
 483
 484 #ifndef YYMAXDEPTH
 485 #define YYMAXDEPTH 10000
 486 #endif
 487
 488 /* Prevent warning if -Wstrict-prototypes.  */
 489 #ifdef __GNUC__
 490 int yyparse (void);
 491 #endif
 492 \f
 493 #if __GNUC__ > 1                /* GNU C and GNU C++ define this.  */
 494 #define __yy_memcpy(TO,FROM,COUNT)      __builtin_memcpy(TO,FROM,COUNT)
 495 #else                           /* not GNU C or C++ */
 496 #ifndef __cplusplus
 497
 498 /* This is the most reliable way to avoid incompatibilities
 499    in available built-in functions on various systems.  */
 500 static void
 501 __yy_memcpy (to, from, count)
 502      char *to;
 503      char *from;
 504      int count;
 505 {
 506   register char *f = from;
 507   register char *t = to;
 508   register int i = count;
 509
 510   while (i-- > 0)
 511     *t++ = *f++;
 512 }
 513
 514 #else /* __cplusplus */
 515
 516 /* This is the most reliable way to avoid incompatibilities
 517    in available built-in functions on various systems.  */
 518 static void
 519 __yy_memcpy (char *to, char *from, int count)
 520 {
 521   register char *f = from;
 522   register char *t = to;
 523   register int i = count;
 524
 525   while (i-- > 0)
 526     *t++ = *f++;
 527 }
 528
 529 #endif
 530 #endif
 531 \f
 532 #line 196 "/tmp/sky/share/bison.simple"
 533
 534 /* The user can define YYPARSE_PARAM as the name of an argument to be passed
 535    into yyparse.  The argument should have type void *.
 536    It should actually point to an object.
 537    Grammar actions can access the variable by casting it
 538    to the proper pointer type.  */
 539
 540 #ifdef YYPARSE_PARAM
 541 #ifdef __cplusplus
 542 #define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
 543 #define YYPARSE_PARAM_DECL
 544 #else /* not __cplusplus */
 545 #define YYPARSE_PARAM_ARG YYPARSE_PARAM
 546 #define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
 547 #endif /* not __cplusplus */
 548 #else /* not YYPARSE_PARAM */
 549 #define YYPARSE_PARAM_ARG
 550 #define YYPARSE_PARAM_DECL
 551 #endif /* not YYPARSE_PARAM */
 552
 553 int
 554 yyparse(YYPARSE_PARAM_ARG)
 555      YYPARSE_PARAM_DECL
 556 {
 557   register int yystate;
 558   register int yyn;
 559   register short *yyssp;
 560   register YYSTYPE *yyvsp;
 561   int yyerrstatus;      /*  number of tokens to shift before error messages enabled */
 562   int yychar1 = 0;              /*  lookahead token as an internal (translated) token number */
 563
 564   short yyssa[YYINITDEPTH];     /*  the state stack                     */
 565   YYSTYPE yyvsa[YYINITDEPTH];   /*  the semantic value stack            */
 566
 567   short *yyss = yyssa;          /*  refer to the stacks thru separate pointers */
 568   YYSTYPE *yyvs = yyvsa;        /*  to allow yyoverflow to reallocate them elsewhere */
 569
 570 #ifdef YYLSP_NEEDED
 571   YYLTYPE yylsa[YYINITDEPTH];   /*  the location stack                  */
 572   YYLTYPE *yyls = yylsa;
 573   YYLTYPE *yylsp;
 574
 575 #define YYPOPSTACK   (yyvsp--, yyssp--, yylsp--)
 576 #else
 577 #define YYPOPSTACK   (yyvsp--, yyssp--)
 578 #endif
 579
 580   int yystacksize = YYINITDEPTH;
 581
 582 #ifdef YYPURE
 583   int yychar;
 584   YYSTYPE yylval;
 585   int yynerrs;
 586 #ifdef YYLSP_NEEDED
 587   YYLTYPE yylloc;
 588 #endif
 589 #endif
 590
 591   YYSTYPE yyval;                /*  the variable used to return         */
 592                                 /*  semantic values from the action     */
 593                                 /*  routines                            */
 594
 595   int yylen;
 596
 597 #if YYDEBUG != 0
 598   if (yydebug)
 599     fprintf(stderr, "Starting parse\n");
 600 #endif
 601
 602   yystate = 0;
 603   yyerrstatus = 0;
 604   yynerrs = 0;
 605   yychar = YYEMPTY;             /* Cause a token to be read.  */
 606
 607   /* Initialize stack pointers.
 608      Waste one element of value and location stack
 609      so that they stay on the same level as the state stack.
 610      The wasted elements are never initialized.  */
 611
 612   yyssp = yyss - 1;
 613   yyvsp = yyvs;
 614 #ifdef YYLSP_NEEDED
 615   yylsp = yyls;
 616 #endif
 617
 618 /* Push a new state, which is found in  yystate  .  */
 619 /* In all cases, when you get here, the value and location stacks
 620    have just been pushed. so pushing a state here evens the stacks.  */
 621 yynewstate:
 622
 623   *++yyssp = yystate;
 624
 625   if (yyssp >= yyss + yystacksize - 1)
 626     {
 627       /* Give user a chance to reallocate the stack */
 628       /* Use copies of these so that the &'s don't force the real ones into memory. */
 629       YYSTYPE *yyvs1 = yyvs;
 630       short *yyss1 = yyss;
 631 #ifdef YYLSP_NEEDED
 632       YYLTYPE *yyls1 = yyls;
 633 #endif
 634
 635       /* Get the current used size of the three stacks, in elements.  */
 636       int size = yyssp - yyss + 1;
 637
 638 #ifdef yyoverflow
 639       /* Each stack pointer address is followed by the size of
 640          the data in use in that stack, in bytes.  */
 641 #ifdef YYLSP_NEEDED
 642       /* This used to be a conditional around just the two extra args,
 643          but that might be undefined if yyoverflow is a macro.  */
 644       yyoverflow("parser stack overflow",
 645                  &yyss1, size * sizeof (*yyssp),
 646                  &yyvs1, size * sizeof (*yyvsp),
 647                  &yyls1, size * sizeof (*yylsp),
 648                  &yystacksize);
 649 #else
 650       yyoverflow("parser stack overflow",
 651                  &yyss1, size * sizeof (*yyssp),
 652                  &yyvs1, size * sizeof (*yyvsp),
 653                  &yystacksize);
 654 #endif
 655
 656       yyss = yyss1; yyvs = yyvs1;
 657 #ifdef YYLSP_NEEDED
 658       yyls = yyls1;
 659 #endif
 660 #else /* no yyoverflow */
 661       /* Extend the stack our own way.  */
 662       if (yystacksize >= YYMAXDEPTH)
 663         {
 664           yyerror("parser stack overflow");
 665           return 2;
 666         }
 667       yystacksize *= 2;
 668       if (yystacksize > YYMAXDEPTH)
 669         yystacksize = YYMAXDEPTH;
 670       yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
 671       __yy_memcpy ((char *)yyss, (char *)yyss1, size * sizeof (*yyssp));
 672       yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
 673       __yy_memcpy ((char *)yyvs, (char *)yyvs1, size * sizeof (*yyvsp));
 674 #ifdef YYLSP_NEEDED
 675       yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
 676       __yy_memcpy ((char *)yyls, (char *)yyls1, size * sizeof (*yylsp));
 677 #endif
 678 #endif /* no yyoverflow */
 679
 680       yyssp = yyss + size - 1;
 681       yyvsp = yyvs + size - 1;
 682 #ifdef YYLSP_NEEDED
 683       yylsp = yyls + size - 1;
 684 #endif
 685
 686 #if YYDEBUG != 0
 687       if (yydebug)
 688         fprintf(stderr, "Stack size increased to %d\n", yystacksize);
 689 #endif
 690
 691       if (yyssp >= yyss + yystacksize - 1)
 692         YYABORT;
 693     }
 694
 695 #if YYDEBUG != 0
 696   if (yydebug)
 697     fprintf(stderr, "Entering state %d\n", yystate);
 698 #endif
 699
 700   goto yybackup;
 701  yybackup:
 702
 703 /* Do appropriate processing given the current state.  */
 704 /* Read a lookahead token if we need one and don't already have one.  */
 705 /* yyresume: */
 706
 707   /* First try to decide what to do without reference to lookahead token.  */
 708
 709   yyn = yypact[yystate];
 710   if (yyn == YYFLAG)
 711     goto yydefault;
 712
 713   /* Not known => get a lookahead token if don't already have one.  */
 714
 715   /* yychar is either YYEMPTY or YYEOF
 716      or a valid token in external form.  */
 717
 718   if (yychar == YYEMPTY)
 719     {
 720 #if YYDEBUG != 0
 721       if (yydebug)
 722         fprintf(stderr, "Reading a token: ");
 723 #endif
 724       yychar = YYLEX;
 725     }
 726
 727   /* Convert token to internal form (in yychar1) for indexing tables with */
 728
 729   if (yychar <= 0)              /* This means end of input. */
 730     {
 731       yychar1 = 0;
 732       yychar = YYEOF;           /* Don't call YYLEX any more */
 733
 734 #if YYDEBUG != 0
 735       if (yydebug)
 736         fprintf(stderr, "Now at end of input.\n");
 737 #endif
 738     }
 739   else
 740     {
 741       yychar1 = YYTRANSLATE(yychar);
 742
 743 #if YYDEBUG != 0
 744       if (yydebug)
 745         {
 746           fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
 747           /* Give the individual parser a way to print the precise meaning
 748              of a token, for further debugging info.  */
 749 #ifdef YYPRINT
 750           YYPRINT (stderr, yychar, yylval);
 751 #endif
 752           fprintf (stderr, ")\n");
 753         }
 754 #endif
 755     }
 756
 757   yyn += yychar1;
 758   if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
 759     goto yydefault;
 760
 761   yyn = yytable[yyn];
 762
 763   /* yyn is what to do for this token type in this state.
 764      Negative => reduce, -yyn is rule number.
 765      Positive => shift, yyn is new state.
 766        New state is final state => don't bother to shift,
 767        just return success.
 768      0, or most negative number => error.  */
 769
 770   if (yyn < 0)
 771     {
 772       if (yyn == YYFLAG)
 773         goto yyerrlab;
 774       yyn = -yyn;
 775       goto yyreduce;
 776     }
 777   else if (yyn == 0)
 778     goto yyerrlab;
 779
 780   if (yyn == YYFINAL)
 781     YYACCEPT;
 782
 783   /* Shift the lookahead token.  */
 784
 785 #if YYDEBUG != 0
 786   if (yydebug)
 787     fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]);
 788 #endif
 789
 790   /* Discard the token being shifted unless it is eof.  */
 791   if (yychar != YYEOF)
 792     yychar = YYEMPTY;
 793
 794   *++yyvsp = yylval;
 795 #ifdef YYLSP_NEEDED
 796   *++yylsp = yylloc;
 797 #endif
 798
 799   /* count tokens shifted since error; after three, turn off error status.  */
 800   if (yyerrstatus) yyerrstatus--;
 801
 802   yystate = yyn;
 803   goto yynewstate;
 804
 805 /* Do the default action for the current state.  */
 806 yydefault:
 807
 808   yyn = yydefact[yystate];
 809   if (yyn == 0)
 810     goto yyerrlab;
 811
 812 /* Do a reduction.  yyn is the number of a rule to reduce with.  */
 813 yyreduce:
 814   yylen = yyr2[yyn];
 815   if (yylen > 0)
 816     yyval = yyvsp[1-yylen]; /* implement default value of the action */
 817
 818 #if YYDEBUG != 0
 819   if (yydebug)
 820     {
 821       int i;
 822
 823       fprintf (stderr, "Reducing via rule %d (line %d), ",
 824                yyn, yyrline[yyn]);
 825
 826       /* Print the symbols being reduced, and their result.  */
 827       for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
 828         fprintf (stderr, "%s ", yytname[yyrhs[i]]);
 829       fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
 830     }
 831 #endif
 832
 833
 834   switch (yyn) {
 835
 836 case 1:
 837 #line 185 "cexp.y"
 838 {
 839                   expression_value = yyvsp[0].integer.value;
 840 #ifdef TEST_EXP_READER
 841                   expression_signedp = yyvsp[0].integer.signedp;
 842 #endif
 843                 ;
 844     break;}
 845 case 3:
 846 #line 196 "cexp.y"
 847 { if (pedantic)
 848                             pedwarn ("comma operator in operand of `#if'");
 849                           yyval.integer = yyvsp[0].integer; ;
 850     break;}
 851 case 4:
 852 #line 203 "cexp.y"
 853 { yyval.integer.value = - yyvsp[0].integer.value;
 854                           yyval.integer.signedp = yyvsp[0].integer.signedp;
 855                           if ((yyval.integer.value & yyvsp[0].integer.value & yyval.integer.signedp) < 0)
 856                             integer_overflow (); ;
 857     break;}
 858 case 5:
 859 #line 208 "cexp.y"
 860 { yyval.integer.value = ! yyvsp[0].integer.value;
 861                           yyval.integer.signedp = SIGNED; ;
 862     break;}
 863 case 6:
 864 #line 211 "cexp.y"
 865 { yyval.integer = yyvsp[0].integer; ;
 866     break;}
 867 case 7:
 868 #line 213 "cexp.y"
 869 { yyval.integer.value = ~ yyvsp[0].integer.value;
 870                           yyval.integer.signedp = yyvsp[0].integer.signedp; ;
 871     break;}
 872 case 8:
 873 #line 216 "cexp.y"
 874 { yyval.integer.value = check_assertion (yyvsp[0].name.address, yyvsp[0].name.length,
 875                                                       0, NULL_PTR);
 876                           yyval.integer.signedp = SIGNED; ;
 877     break;}
 878 case 9:
 879 #line 220 "cexp.y"
 880 { keyword_parsing = 1; ;
 881     break;}
 882 case 10:
 883 #line 222 "cexp.y"
 884 { yyval.integer.value = check_assertion (yyvsp[-4].name.address, yyvsp[-4].name.length,
 885                                                       1, yyvsp[-1].keywords);
 886                           keyword_parsing = 0;
 887                           yyval.integer.signedp = SIGNED; ;
 888     break;}
 889 case 11:
 890 #line 227 "cexp.y"
 891 { yyval.integer = yyvsp[-1].integer; ;
 892     break;}
 893 case 12:
 894 #line 232 "cexp.y"
 895 { yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp;
 896                           if (yyval.integer.signedp)
 897                             {
 898                               yyval.integer.value = yyvsp[-2].integer.value * yyvsp[0].integer.value;
 899                               if (yyvsp[-2].integer.value
 900                                   && (yyval.integer.value / yyvsp[-2].integer.value != yyvsp[0].integer.value
 901                                       || (yyval.integer.value & yyvsp[-2].integer.value & yyvsp[0].integer.value) < 0))
 902                                 integer_overflow ();
 903                             }
 904                           else
 905                             yyval.integer.value = ((unsigned HOST_WIDEST_INT) yyvsp[-2].integer.value
 906                                         * yyvsp[0].integer.value); ;
 907     break;}
 908 case 13:
 909 #line 245 "cexp.y"
 910 { if (yyvsp[0].integer.value == 0)
 911                             {
 912                               if (!skip_evaluation)
 913                                 error ("division by zero in #if");
 914                               yyvsp[0].integer.value = 1;
 915                             }
 916                           yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp;
 917                           if (yyval.integer.signedp)
 918                             {
 919                               yyval.integer.value = yyvsp[-2].integer.value / yyvsp[0].integer.value;
 920                               if ((yyval.integer.value & yyvsp[-2].integer.value & yyvsp[0].integer.value) < 0)
 921                                 integer_overflow ();
 922                             }
 923                           else
 924                             yyval.integer.value = ((unsigned HOST_WIDEST_INT) yyvsp[-2].integer.value
 925                                         / yyvsp[0].integer.value); ;
 926     break;}
 927 case 14:
 928 #line 262 "cexp.y"
 929 { if (yyvsp[0].integer.value == 0)
 930                             {
 931                               if (!skip_evaluation)
 932                                 error ("division by zero in #if");
 933                               yyvsp[0].integer.value = 1;
 934                             }
 935                           yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp;
 936                           if (yyval.integer.signedp)
 937                             yyval.integer.value = yyvsp[-2].integer.value % yyvsp[0].integer.value;
 938                           else
 939                             yyval.integer.value = ((unsigned HOST_WIDEST_INT) yyvsp[-2].integer.value
 940                                         % yyvsp[0].integer.value); ;
 941     break;}
 942 case 15:
 943 #line 275 "cexp.y"
 944 { yyval.integer.value = yyvsp[-2].integer.value + yyvsp[0].integer.value;
 945                           yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp;
 946                           if (overflow_sum_sign (yyvsp[-2].integer.value, yyvsp[0].integer.value,
 947                                                  yyval.integer.value, yyval.integer.signedp))
 948                             integer_overflow (); ;
 949     break;}
 950 case 16:
 951 #line 281 "cexp.y"
 952 { yyval.integer.value = yyvsp[-2].integer.value - yyvsp[0].integer.value;
 953                           yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp;
 954                           if (overflow_sum_sign (yyval.integer.value, yyvsp[0].integer.value,
 955                                                  yyvsp[-2].integer.value, yyval.integer.signedp))
 956                             integer_overflow (); ;
 957     break;}
 958 case 17:
 959 #line 287 "cexp.y"
 960 { yyval.integer.signedp = yyvsp[-2].integer.signedp;
 961                           if ((yyvsp[0].integer.value & yyvsp[0].integer.signedp) < 0)
 962                             yyval.integer.value = right_shift (&yyvsp[-2].integer, -yyvsp[0].integer.value);
 963                           else
 964                             yyval.integer.value = left_shift (&yyvsp[-2].integer, yyvsp[0].integer.value); ;
 965     break;}
 966 case 18:
 967 #line 293 "cexp.y"
 968 { yyval.integer.signedp = yyvsp[-2].integer.signedp;
 969                           if ((yyvsp[0].integer.value & yyvsp[0].integer.signedp) < 0)
 970                             yyval.integer.value = left_shift (&yyvsp[-2].integer, -yyvsp[0].integer.value);
 971                           else
 972                             yyval.integer.value = right_shift (&yyvsp[-2].integer, yyvsp[0].integer.value); ;
 973     break;}
 974 case 19:
 975 #line 299 "cexp.y"
 976 { yyval.integer.value = (yyvsp[-2].integer.value == yyvsp[0].integer.value);
 977                           yyval.integer.signedp = SIGNED; ;
 978     break;}
 979 case 20:
 980 #line 302 "cexp.y"
 981 { yyval.integer.value = (yyvsp[-2].integer.value != yyvsp[0].integer.value);
 982                           yyval.integer.signedp = SIGNED; ;
 983     break;}
 984 case 21:
 985 #line 305 "cexp.y"
 986 { yyval.integer.signedp = SIGNED;
 987                           if (yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp)
 988                             yyval.integer.value = yyvsp[-2].integer.value <= yyvsp[0].integer.value;
 989                           else
 990                             yyval.integer.value = ((unsigned HOST_WIDEST_INT) yyvsp[-2].integer.value
 991                                         <= yyvsp[0].integer.value); ;
 992     break;}
 993 case 22:
 994 #line 312 "cexp.y"
 995 { yyval.integer.signedp = SIGNED;
 996                           if (yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp)
 997                             yyval.integer.value = yyvsp[-2].integer.value >= yyvsp[0].integer.value;
 998                           else
 999                             yyval.integer.value = ((unsigned HOST_WIDEST_INT) yyvsp[-2].integer.value
1000                                         >= yyvsp[0].integer.value); ;
1001     break;}
1002 case 23:
1003 #line 319 "cexp.y"
1004 { yyval.integer.signedp = SIGNED;
1005                           if (yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp)
1006                             yyval.integer.value = yyvsp[-2].integer.value < yyvsp[0].integer.value;
1007                           else
1008                             yyval.integer.value = ((unsigned HOST_WIDEST_INT) yyvsp[-2].integer.value
1009                                         < yyvsp[0].integer.value); ;
1010     break;}
1011 case 24:
1012 #line 326 "cexp.y"
1013 { yyval.integer.signedp = SIGNED;
1014                           if (yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp)
1015                             yyval.integer.value = yyvsp[-2].integer.value > yyvsp[0].integer.value;
1016                           else
1017                             yyval.integer.value = ((unsigned HOST_WIDEST_INT) yyvsp[-2].integer.value
1018                                         > yyvsp[0].integer.value); ;
1019     break;}
1020 case 25:
1021 #line 333 "cexp.y"
1022 { yyval.integer.value = yyvsp[-2].integer.value & yyvsp[0].integer.value;
1023                           yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp; ;
1024     break;}
1025 case 26:
1026 #line 336 "cexp.y"
1027 { yyval.integer.value = yyvsp[-2].integer.value ^ yyvsp[0].integer.value;
1028                           yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp; ;
1029     break;}
1030 case 27:
1031 #line 339 "cexp.y"
1032 { yyval.integer.value = yyvsp[-2].integer.value | yyvsp[0].integer.value;
1033                           yyval.integer.signedp = yyvsp[-2].integer.signedp & yyvsp[0].integer.signedp; ;
1034     break;}
1035 case 28:
1036 #line 342 "cexp.y"
1037 { skip_evaluation += !yyvsp[-1].integer.value; ;
1038     break;}
1039 case 29:
1040 #line 344 "cexp.y"
1041 { skip_evaluation -= !yyvsp[-3].integer.value;
1042                           yyval.integer.value = (yyvsp[-3].integer.value && yyvsp[0].integer.value);
1043                           yyval.integer.signedp = SIGNED; ;
1044     break;}
1045 case 30:
1046 #line 348 "cexp.y"
1047 { skip_evaluation += !!yyvsp[-1].integer.value; ;
1048     break;}
1049 case 31:
1050 #line 350 "cexp.y"
1051 { skip_evaluation -= !!yyvsp[-3].integer.value;
1052                           yyval.integer.value = (yyvsp[-3].integer.value || yyvsp[0].integer.value);
1053                           yyval.integer.signedp = SIGNED; ;
1054     break;}
1055 case 32:
1056 #line 354 "cexp.y"
1057 { skip_evaluation += !yyvsp[-1].integer.value; ;
1058     break;}
1059 case 33:
1060 #line 356 "cexp.y"
1061 { skip_evaluation += !!yyvsp[-4].integer.value - !yyvsp[-4].integer.value; ;
1062     break;}
1063 case 34:
1064 #line 358 "cexp.y"
1065 { skip_evaluation -= !!yyvsp[-6].integer.value;
1066                           yyval.integer.value = yyvsp[-6].integer.value ? yyvsp[-3].integer.value : yyvsp[0].integer.value;
1067                           yyval.integer.signedp = yyvsp[-3].integer.signedp & yyvsp[0].integer.signedp; ;
1068     break;}
1069 case 35:
1070 #line 362 "cexp.y"
1071 { yyval.integer = yylval.integer; ;
1072     break;}
1073 case 36:
1074 #line 364 "cexp.y"
1075 { yyval.integer = yylval.integer; ;
1076     break;}
1077 case 37:
1078 #line 366 "cexp.y"
1079 { if (warn_undef && !skip_evaluation)
1080                             warning ("`%.*s' is not defined",
1081                                      yyvsp[0].name.length, yyvsp[0].name.address);
1082                           yyval.integer.value = 0;
1083                           yyval.integer.signedp = SIGNED; ;
1084     break;}
1085 case 38:
1086 #line 374 "cexp.y"
1087 { yyval.keywords = 0; ;
1088     break;}
1089 case 39:
1090 #line 376 "cexp.y"
1091 { struct arglist *temp;
1092                           yyval.keywords = (struct arglist *) xmalloc (sizeof (struct arglist));
1093                           yyval.keywords->next = yyvsp[-2].keywords;
1094                           yyval.keywords->name = (U_CHAR *) "(";
1095                           yyval.keywords->length = 1;
1096                           temp = yyval.keywords;
1097                           while (temp != 0 && temp->next != 0)
1098                             temp = temp->next;
1099                           temp->next = (struct arglist *) xmalloc (sizeof (struct arglist));
1100                           temp->next->next = yyvsp[0].keywords;
1101                           temp->next->name = (U_CHAR *) ")";
1102                           temp->next->length = 1; ;
1103     break;}
1104 case 40:
1105 #line 389 "cexp.y"
1106 { yyval.keywords = (struct arglist *) xmalloc (sizeof (struct arglist));
1107                           yyval.keywords->name = yyvsp[-1].name.address;
1108                           yyval.keywords->length = yyvsp[-1].name.length;
1109                           yyval.keywords->next = yyvsp[0].keywords; ;
1110     break;}
1111 }
1112    /* the action file gets copied in in place of this dollarsign */
1113 #line 498 "/tmp/sky/share/bison.simple"
1114 \f
1115   yyvsp -= yylen;
1116   yyssp -= yylen;
1117 #ifdef YYLSP_NEEDED
1118   yylsp -= yylen;
1119 #endif
1120
1121 #if YYDEBUG != 0
1122   if (yydebug)
1123     {
1124       short *ssp1 = yyss - 1;
1125       fprintf (stderr, "state stack now");
1126       while (ssp1 != yyssp)
1127         fprintf (stderr, " %d", *++ssp1);
1128       fprintf (stderr, "\n");
1129     }
1130 #endif
1131
1132   *++yyvsp = yyval;
1133
1134 #ifdef YYLSP_NEEDED
1135   yylsp++;
1136   if (yylen == 0)
1137     {
1138       yylsp->first_line = yylloc.first_line;
1139       yylsp->first_column = yylloc.first_column;
1140       yylsp->last_line = (yylsp-1)->last_line;
1141       yylsp->last_column = (yylsp-1)->last_column;
1142       yylsp->text = 0;
1143     }
1144   else
1145     {
1146       yylsp->last_line = (yylsp+yylen-1)->last_line;
1147       yylsp->last_column = (yylsp+yylen-1)->last_column;
1148     }
1149 #endif
1150
1151   /* Now "shift" the result of the reduction.
1152      Determine what state that goes to,
1153      based on the state we popped back to
1154      and the rule number reduced by.  */
1155
1156   yyn = yyr1[yyn];
1157
1158   yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
1159   if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1160     yystate = yytable[yystate];
1161   else
1162     yystate = yydefgoto[yyn - YYNTBASE];
1163
1164   goto yynewstate;
1165
1166 yyerrlab:   /* here on detecting error */
1167
1168   if (! yyerrstatus)
1169     /* If not already recovering from an error, report this error.  */
1170     {
1171       ++yynerrs;
1172
1173 #ifdef YYERROR_VERBOSE
1174       yyn = yypact[yystate];
1175
1176       if (yyn > YYFLAG && yyn < YYLAST)
1177         {
1178           int size = 0;
1179           char *msg;
1180           int x, count;
1181
1182           count = 0;
1183           /* Start X at -yyn if nec to avoid negative indexes in yycheck.  */
1184           for (x = (yyn < 0 ? -yyn : 0);
1185                x < (sizeof(yytname) / sizeof(char *)); x++)
1186             if (yycheck[x + yyn] == x)
1187               size += strlen(yytname[x]) + 15, count++;
1188           msg = (char *) malloc(size + 15);
1189           if (msg != 0)
1190             {
1191               strcpy(msg, "parse error");
1192
1193               if (count < 5)
1194                 {
1195                   count = 0;
1196                   for (x = (yyn < 0 ? -yyn : 0);
1197                        x < (sizeof(yytname) / sizeof(char *)); x++)
1198                     if (yycheck[x + yyn] == x)
1199                       {
1200                         strcat(msg, count == 0 ? ", expecting `" : " or `");
1201                         strcat(msg, yytname[x]);
1202                         strcat(msg, "'");
1203                         count++;
1204                       }
1205                 }
1206               yyerror(msg);
1207               free(msg);
1208             }
1209           else
1210             yyerror ("parse error; also virtual memory exceeded");
1211         }
1212       else
1213 #endif /* YYERROR_VERBOSE */
1214         yyerror("parse error");
1215     }
1216
1217   goto yyerrlab1;
1218 yyerrlab1:   /* here on error raised explicitly by an action */
1219
1220   if (yyerrstatus == 3)
1221     {
1222       /* if just tried and failed to reuse lookahead token after an error, discard it.  */
1223
1224       /* return failure if at end of input */
1225       if (yychar == YYEOF)
1226         YYABORT;
1227
1228 #if YYDEBUG != 0
1229       if (yydebug)
1230         fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]);
1231 #endif
1232
1233       yychar = YYEMPTY;
1234     }
1235
1236   /* Else will try to reuse lookahead token
1237      after shifting the error token.  */
1238
1239   yyerrstatus = 3;              /* Each real token shifted decrements this */
1240
1241   goto yyerrhandle;
1242
1243 yyerrdefault:  /* current state does not do anything special for the error token. */
1244
1245 #if 0
1246   /* This is wrong; only states that explicitly want error tokens
1247      should shift them.  */
1248   yyn = yydefact[yystate];  /* If its default is to accept any token, ok.  Otherwise pop it.*/
1249   if (yyn) goto yydefault;
1250 #endif
1251
1252 yyerrpop:   /* pop the current state because it cannot handle the error token */
1253
1254   if (yyssp == yyss) YYABORT;
1255   yyvsp--;
1256   yystate = *--yyssp;
1257 #ifdef YYLSP_NEEDED
1258   yylsp--;
1259 #endif
1260
1261 #if YYDEBUG != 0
1262   if (yydebug)
1263     {
1264       short *ssp1 = yyss - 1;
1265       fprintf (stderr, "Error: state stack now");
1266       while (ssp1 != yyssp)
1267         fprintf (stderr, " %d", *++ssp1);
1268       fprintf (stderr, "\n");
1269     }
1270 #endif
1271
1272 yyerrhandle:
1273
1274   yyn = yypact[yystate];
1275   if (yyn == YYFLAG)
1276     goto yyerrdefault;
1277
1278   yyn += YYTERROR;
1279   if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
1280     goto yyerrdefault;
1281
1282   yyn = yytable[yyn];
1283   if (yyn < 0)
1284     {
1285       if (yyn == YYFLAG)
1286         goto yyerrpop;
1287       yyn = -yyn;
1288       goto yyreduce;
1289     }
1290   else if (yyn == 0)
1291     goto yyerrpop;
1292
1293   if (yyn == YYFINAL)
1294     YYACCEPT;
1295
1296 #if YYDEBUG != 0
1297   if (yydebug)
1298     fprintf(stderr, "Shifting error token, ");
1299 #endif
1300
1301   *++yyvsp = yylval;
1302 #ifdef YYLSP_NEEDED
1303   *++yylsp = yylloc;
1304 #endif
1305
1306   yystate = yyn;
1307   goto yynewstate;
1308 }
1309 #line 394 "cexp.y"
1310
1311 \f
1312 /* During parsing of a C expression, the pointer to the next character
1313    is in this variable.  */
1314
1315 static char *lexptr;
1316
1317 /* Take care of parsing a number (anything that starts with a digit).
1318    Set yylval and return the token type; update lexptr.
1319    LEN is the number of characters in it.  */
1320
1321 /* maybe needs to actually deal with floating point numbers */
1322
1323 static int
1324 parse_number (olen)
1325      int olen;
1326 {
1327   register char *p = lexptr;
1328   register int c;
1329   register unsigned HOST_WIDEST_INT n = 0, nd, max_over_base;
1330   register int base = 10;
1331   register int len = olen;
1332   register int overflow = 0;
1333   register int digit, largest_digit = 0;
1334   int spec_long = 0;
1335
1336   yylval.integer.signedp = SIGNED;
1337
1338   if (*p == '0') {
1339     base = 8;
1340     if (len >= 3 && (p[1] == 'x' || p[1] == 'X')) {
1341       p += 2;
1342       base = 16;
1343       len -= 2;
1344     }
1345   }
1346
1347   max_over_base = (unsigned HOST_WIDEST_INT) -1 / base;
1348
1349   for (; len > 0; len--) {
1350     c = *p++;
1351
1352     if (c >= '0' && c <= '9')
1353       digit = c - '0';
1354     else if (base == 16 && c >= 'a' && c <= 'f')
1355       digit = c - 'a' + 10;
1356     else if (base == 16 && c >= 'A' && c <= 'F')
1357       digit = c - 'A' + 10;
1358     else {
1359       /* `l' means long, and `u' means unsigned.  */
1360       while (1) {
1361         if (c == 'l' || c == 'L')
1362           {
1363             if (!pedantic < spec_long)
1364               yyerror ("too many `l's in integer constant");
1365             spec_long++;
1366           }
1367         else if (c == 'u' || c == 'U')
1368           {
1369             if (! yylval.integer.signedp)
1370               yyerror ("two `u's in integer constant");
1371             yylval.integer.signedp = UNSIGNED;
1372           }
1373         else {
1374           if (c == '.' || c == 'e' || c == 'E' || c == 'p' || c == 'P')
1375             yyerror ("Floating point numbers not allowed in #if expressions");
1376           else
1377             yyerror ("missing white space after number `%.*s'",
1378                      (int) (p - lexptr - 1), lexptr);
1379         }
1380
1381         if (--len == 0)
1382           break;
1383         c = *p++;
1384       }
1385       /* Don't look for any more digits after the suffixes.  */
1386       break;
1387     }
1388     if (largest_digit < digit)
1389       largest_digit = digit;
1390     nd = n * base + digit;
1391     overflow |= (max_over_base < n) | (nd < n);
1392     n = nd;
1393   }
1394
1395   if (base <= largest_digit)
1396     pedwarn ("integer constant contains digits beyond the radix");
1397
1398   if (overflow)
1399     pedwarn ("integer constant out of range");
1400
1401   /* If too big to be signed, consider it unsigned.  */
1402   if (((HOST_WIDEST_INT) n & yylval.integer.signedp) < 0)
1403     {
1404       if (base == 10)
1405         warning ("integer constant is so large that it is unsigned");
1406       yylval.integer.signedp = UNSIGNED;
1407     }
1408
1409   lexptr = p;
1410   yylval.integer.value = n;
1411   return INT;
1412 }
1413
1414 struct token {
1415   const char *operator;
1416   int token;
1417 };
1418
1419 static struct token tokentab2[] = {
1420   {"&&", AND},
1421   {"||", OR},
1422   {"<<", LSH},
1423   {">>", RSH},
1424   {"==", EQUAL},
1425   {"!=", NOTEQUAL},
1426   {"<=", LEQ},
1427   {">=", GEQ},
1428   {"++", ERROR},
1429   {"--", ERROR},
1430   {NULL, ERROR}
1431 };
1432
1433 /* Read one token, getting characters through lexptr.  */
1434
1435 static int
1436 yylex ()
1437 {
1438   register int c;
1439   register int namelen;
1440   register unsigned char *tokstart;
1441   register struct token *toktab;
1442   int wide_flag;
1443   HOST_WIDEST_INT mask;
1444
1445  retry:
1446
1447   tokstart = (unsigned char *) lexptr;
1448   c = *tokstart;
1449   /* See if it is a special token of length 2.  */
1450   if (! keyword_parsing)
1451     for (toktab = tokentab2; toktab->operator != NULL; toktab++)
1452       if (c == *toktab->operator && tokstart[1] == toktab->operator[1]) {
1453         lexptr += 2;
1454         if (toktab->token == ERROR)
1455           yyerror ("`%s' not allowed in operand of `#if'", toktab->operator);
1456         return toktab->token;
1457       }
1458
1459   switch (c) {
1460   case '\n':
1461     return 0;
1462
1463   case ' ':
1464   case '\t':
1465   case '\r':
1466     lexptr++;
1467     goto retry;
1468
1469   case 'L':
1470     /* Capital L may start a wide-string or wide-character constant.  */
1471     if (lexptr[1] == '\'')
1472       {
1473         lexptr++;
1474         wide_flag = 1;
1475         mask = MAX_WCHAR_TYPE_MASK;
1476         goto char_constant;
1477       }
1478     if (lexptr[1] == '"')
1479       {
1480         lexptr++;
1481         wide_flag = 1;
1482         mask = MAX_WCHAR_TYPE_MASK;
1483         goto string_constant;
1484       }
1485     break;
1486
1487   case '\'':
1488     wide_flag = 0;
1489     mask = MAX_CHAR_TYPE_MASK;
1490   char_constant:
1491     lexptr++;
1492     if (keyword_parsing) {
1493       char *start_ptr = lexptr - 1;
1494       while (1) {
1495         c = *lexptr++;
1496         if (c == '\\')
1497           c = parse_escape (&lexptr, mask);
1498         else if (c == '\'')
1499           break;
1500       }
1501       yylval.name.address = tokstart;
1502       yylval.name.length = lexptr - start_ptr;
1503       return NAME;
1504     }
1505
1506     /* This code for reading a character constant
1507        handles multicharacter constants and wide characters.
1508        It is mostly copied from c-lex.c.  */
1509     {
1510       register HOST_WIDEST_INT result = 0;
1511       register int num_chars = 0;
1512       int chars_seen = 0;
1513       unsigned width = MAX_CHAR_TYPE_SIZE;
1514       int max_chars;
1515 #ifdef MULTIBYTE_CHARS
1516       int longest_char = local_mb_cur_max ();
1517       char *token_buffer = (char *) alloca (longest_char);
1518       (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
1519 #endif
1520
1521       max_chars = MAX_LONG_TYPE_SIZE / width;
1522       if (wide_flag)
1523         width = MAX_WCHAR_TYPE_SIZE;
1524
1525       while (1)
1526         {
1527           c = *lexptr++;
1528
1529           if (c == '\'' || c == EOF)
1530             break;
1531
1532           ++chars_seen;
1533           if (c == '\\')
1534             {
1535               c = parse_escape (&lexptr, mask);
1536             }
1537           else
1538             {
1539 #ifdef MULTIBYTE_CHARS
1540               wchar_t wc;
1541               int i;
1542               int char_len = -1;
1543               for (i = 1; i <= longest_char; ++i)
1544                 {
1545                   token_buffer[i - 1] = c;
1546                   char_len = local_mbtowc (& wc, token_buffer, i);
1547                   if (char_len != -1)
1548                     break;
1549                   c = *lexptr++;
1550                 }
1551               if (char_len > 1)
1552                 {
1553                   /* mbtowc sometimes needs an extra char before accepting */
1554                   if (char_len < i)
1555                     lexptr--;
1556                   if (! wide_flag)
1557                     {
1558                       /* Merge character into result; ignore excess chars.  */
1559                       for (i = 1; i <= char_len; ++i)
1560                         {
1561                           if (i > max_chars)
1562                             break;
1563                           if (width < HOST_BITS_PER_INT)
1564                             result = (result << width)
1565                               | (token_buffer[i - 1]
1566                                  & ((1 << width) - 1));
1567                           else
1568                             result = token_buffer[i - 1];
1569                         }
1570                       num_chars += char_len;
1571                       continue;
1572                     }
1573                 }
1574               else
1575                 {
1576                   if (char_len == -1)
1577                     warning ("Ignoring invalid multibyte character");
1578                 }
1579               if (wide_flag)
1580                 c = wc;
1581 #endif /* ! MULTIBYTE_CHARS */
1582             }
1583
1584           if (wide_flag)
1585             {
1586               if (chars_seen == 1) /* only keep the first one */
1587                 result = c;
1588               continue;
1589             }
1590
1591           /* Merge character into result; ignore excess chars.  */
1592           num_chars++;
1593           if (num_chars <= max_chars)
1594             {
1595               if (width < HOST_BITS_PER_INT)
1596                 result = (result << width) | (c & ((1 << width) - 1));
1597               else
1598                 result = c;
1599             }
1600         }
1601
1602       if (c != '\'')
1603         error ("malformatted character constant");
1604       else if (chars_seen == 0)
1605         error ("empty character constant");
1606       else if (num_chars > max_chars)
1607         {
1608           num_chars = max_chars;
1609           error ("character constant too long");
1610         }
1611       else if (chars_seen != 1 && ! traditional)
1612         warning ("multi-character character constant");
1613
1614       /* If char type is signed, sign-extend the constant.  */
1615       if (! wide_flag)
1616         {
1617           int num_bits = num_chars * width;
1618           if (num_bits == 0)
1619             /* We already got an error; avoid invalid shift.  */
1620             yylval.integer.value = 0;
1621           else if (lookup ((U_CHAR *) "__CHAR_UNSIGNED__",
1622                       sizeof ("__CHAR_UNSIGNED__") - 1, -1)
1623               || ((result >> (num_bits - 1)) & 1) == 0)
1624             yylval.integer.value
1625               = result & (~ (unsigned HOST_WIDEST_INT) 0
1626                           >> (HOST_BITS_PER_WIDEST_INT - num_bits));
1627           else
1628             yylval.integer.value
1629               = result | ~(~ (unsigned HOST_WIDEST_INT) 0
1630                            >> (HOST_BITS_PER_WIDEST_INT - num_bits));
1631         }
1632       else
1633         {
1634           yylval.integer.value = result;
1635         }
1636     }
1637
1638     /* This is always a signed type.  */
1639     yylval.integer.signedp = SIGNED;
1640
1641     return CHAR;
1642
1643     /* some of these chars are invalid in constant expressions;
1644        maybe do something about them later */
1645   case '/':
1646   case '+':
1647   case '-':
1648   case '*':
1649   case '%':
1650   case '|':
1651   case '&':
1652   case '^':
1653   case '~':
1654   case '!':
1655   case '@':
1656   case '<':
1657   case '>':
1658   case '[':
1659   case ']':
1660   case '.':
1661   case '?':
1662   case ':':
1663   case '=':
1664   case '{':
1665   case '}':
1666   case ',':
1667   case '#':
1668     if (keyword_parsing)
1669       break;
1670   case '(':
1671   case ')':
1672     lexptr++;
1673     return c;
1674
1675   case '"':
1676     mask = MAX_CHAR_TYPE_MASK;
1677   string_constant:
1678     if (keyword_parsing) {
1679       char *start_ptr = lexptr;
1680       lexptr++;
1681       while (1) {
1682         c = *lexptr++;
1683         if (c == '\\')
1684           c = parse_escape (&lexptr, mask);
1685         else if (c == '"')
1686           break;
1687       }
1688       yylval.name.address = tokstart;
1689       yylval.name.length = lexptr - start_ptr;
1690       return NAME;
1691     }
1692     yyerror ("string constants not allowed in #if expressions");
1693     return ERROR;
1694   }
1695
1696   if (c >= '0' && c <= '9' && !keyword_parsing) {
1697     /* It's a number */
1698     for (namelen = 1; ; namelen++) {
1699       int d = tokstart[namelen];
1700       if (! ((is_idchar[d] || d == '.')
1701              || ((d == '-' || d == '+')
1702                  && (c == 'e' || c == 'E'
1703                      || ((c == 'p' || c == 'P') && ! c89))
1704                  && ! traditional)))
1705         break;
1706       c = d;
1707     }
1708     return parse_number (namelen);
1709   }
1710
1711   /* It is a name.  See how long it is.  */
1712
1713   if (keyword_parsing) {
1714     for (namelen = 0;; namelen++) {
1715       if (is_space[tokstart[namelen]])
1716         break;
1717       if (tokstart[namelen] == '(' || tokstart[namelen] == ')')
1718         break;
1719       if (tokstart[namelen] == '"' || tokstart[namelen] == '\'')
1720         break;
1721     }
1722   } else {
1723     if (!is_idstart[c]) {
1724       yyerror ("Invalid token in expression");
1725       return ERROR;
1726     }
1727
1728     for (namelen = 0; is_idchar[tokstart[namelen]]; namelen++)
1729       ;
1730   }
1731
1732   lexptr += namelen;
1733   yylval.name.address = tokstart;
1734   yylval.name.length = namelen;
1735   return NAME;
1736 }
1737
1738
1739 /* Parse a C escape sequence.  STRING_PTR points to a variable
1740    containing a pointer to the string to parse.  That pointer
1741    is updated past the characters we use.  The value of the
1742    escape sequence is returned.
1743
1744    RESULT_MASK is used to mask out the result;
1745    an error is reported if bits are lost thereby.
1746
1747    A negative value means the sequence \ newline was seen,
1748    which is supposed to be equivalent to nothing at all.
1749
1750    If \ is followed by a null character, we return a negative
1751    value and leave the string pointer pointing at the null character.
1752
1753    If \ is followed by 000, we return 0 and leave the string pointer
1754    after the zeros.  A value of 0 does not mean end of string.  */
1755
1756 HOST_WIDEST_INT
1757 parse_escape (string_ptr, result_mask)
1758      char **string_ptr;
1759      HOST_WIDEST_INT result_mask;
1760 {
1761   register int c = *(*string_ptr)++;
1762   switch (c)
1763     {
1764     case 'a':
1765       return TARGET_BELL;
1766     case 'b':
1767       return TARGET_BS;
1768     case 'e':
1769     case 'E':
1770       if (pedantic)
1771         pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c);
1772       return 033;
1773     case 'f':
1774       return TARGET_FF;
1775     case 'n':
1776       return TARGET_NEWLINE;
1777     case 'r':
1778       return TARGET_CR;
1779     case 't':
1780       return TARGET_TAB;
1781     case 'v':
1782       return TARGET_VT;
1783     case '\n':
1784       return -2;
1785     case 0:
1786       (*string_ptr)--;
1787       return 0;
1788
1789     case '0':
1790     case '1':
1791     case '2':
1792     case '3':
1793     case '4':
1794     case '5':
1795     case '6':
1796     case '7':
1797       {
1798         register HOST_WIDEST_INT i = c - '0';
1799         register int count = 0;
1800         while (++count < 3)
1801           {
1802             c = *(*string_ptr)++;
1803             if (c >= '0' && c <= '7')
1804               i = (i << 3) + c - '0';
1805             else
1806               {
1807                 (*string_ptr)--;
1808                 break;
1809               }
1810           }
1811         if (i != (i & result_mask))
1812           {
1813             i &= result_mask;
1814             pedwarn ("octal escape sequence out of range");
1815           }
1816         return i;
1817       }
1818     case 'x':
1819       {
1820         register unsigned HOST_WIDEST_INT i = 0, overflow = 0;
1821         register int digits_found = 0, digit;
1822         for (;;)
1823           {
1824             c = *(*string_ptr)++;
1825             if (c >= '0' && c <= '9')
1826               digit = c - '0';
1827             else if (c >= 'a' && c <= 'f')
1828               digit = c - 'a' + 10;
1829             else if (c >= 'A' && c <= 'F')
1830               digit = c - 'A' + 10;
1831             else
1832               {
1833                 (*string_ptr)--;
1834                 break;
1835               }
1836             overflow |= i ^ (i << 4 >> 4);
1837             i = (i << 4) + digit;
1838             digits_found = 1;
1839           }
1840         if (!digits_found)
1841           yyerror ("\\x used with no following hex digits");
1842         if (overflow | (i != (i & result_mask)))
1843           {
1844             i &= result_mask;
1845             pedwarn ("hex escape sequence out of range");
1846           }
1847         return i;
1848       }
1849     default:
1850       return c;
1851     }
1852 }
1853
1854 static void
1855 integer_overflow ()
1856 {
1857   if (!skip_evaluation && pedantic)
1858     pedwarn ("integer overflow in preprocessor expression");
1859 }
1860
1861 static HOST_WIDEST_INT
1862 left_shift (a, b)
1863      struct constant *a;
1864      unsigned HOST_WIDEST_INT b;
1865 {
1866    /* It's unclear from the C standard whether shifts can overflow.
1867       The following code ignores overflow; perhaps a C standard
1868       interpretation ruling is needed.  */
1869   if (b >= HOST_BITS_PER_WIDEST_INT)
1870     return 0;
1871   else
1872     return (unsigned HOST_WIDEST_INT) a->value << b;
1873 }
1874
1875 static HOST_WIDEST_INT
1876 right_shift (a, b)
1877      struct constant *a;
1878      unsigned HOST_WIDEST_INT b;
1879 {
1880   if (b >= HOST_BITS_PER_WIDEST_INT)
1881     return a->signedp ? a->value >> (HOST_BITS_PER_WIDEST_INT - 1) : 0;
1882   else if (a->signedp)
1883     return a->value >> b;
1884   else
1885     return (unsigned HOST_WIDEST_INT) a->value >> b;
1886 }
1887 \f
1888 /* This page contains the entry point to this file.  */
1889
1890 /* Parse STRING as an expression, and complain if this fails
1891    to use up all of the contents of STRING.
1892    STRING may contain '\0' bytes; it is terminated by the first '\n'
1893    outside a string constant, so that we can diagnose '\0' properly.
1894    If WARN_UNDEFINED is nonzero, warn if undefined identifiers are evaluated.
1895    We do not support C comments.  They should be removed before
1896    this function is called.  */
1897
1898 HOST_WIDEST_INT
1899 parse_c_expression (string, warn_undefined)
1900      char *string;
1901      int warn_undefined;
1902 {
1903   lexptr = string;
1904   warn_undef = warn_undefined;
1905
1906   /* if there is some sort of scanning error, just return 0 and assume
1907      the parsing routine has printed an error message somewhere.
1908      there is surely a better thing to do than this.     */
1909   if (setjmp (parse_return_error))
1910     return 0;
1911
1912   if (yyparse () != 0)
1913     abort ();
1914
1915   if (*lexptr != '\n')
1916     error ("Junk after end of expression.");
1917
1918   return expression_value;      /* set by yyparse () */
1919 }
1920
1921 static void
1922 yyerror VPROTO ((const char * msgid, ...))
1923 {
1924 #ifndef ANSI_PROTOTYPES
1925   const char * msgid;
1926 #endif
1927   va_list args;
1928
1929   VA_START (args, msgid);
1930
1931 #ifndef ANSI_PROTOTYPES
1932   msgid = va_arg (args, const char *);
1933 #endif
1934
1935   verror (msgid, args);
1936   va_end (args);
1937   skip_evaluation = 0;
1938   longjmp (parse_return_error, 1);
1939 }
1940
1941 \f
1942 #ifdef TEST_EXP_READER
1943
1944 #if YYDEBUG
1945 extern int yydebug;
1946 #endif
1947
1948 int pedantic;
1949 int traditional;
1950 int c89;
1951
1952 int main PROTO((int, char **));
1953 static void initialize_random_junk PROTO((void));
1954 static void print_unsigned_host_widest_int PROTO((unsigned HOST_WIDEST_INT));
1955
1956 /* Main program for testing purposes.  */
1957 int
1958 main (argc, argv)
1959      int argc;
1960      char **argv;
1961 {
1962   int n, c;
1963   char buf[1024];
1964   unsigned HOST_WIDEST_INT u;
1965
1966   pedantic = 1 < argc;
1967   traditional = 2 < argc;
1968   c89 = 3 < argc;
1969 #if YYDEBUG
1970   yydebug = 4 < argc;
1971 #endif
1972   initialize_random_junk ();
1973
1974   for (;;) {
1975     printf ("enter expression: ");
1976     n = 0;
1977     while ((buf[n] = c = getchar ()) != '\n' && c != EOF)
1978       n++;
1979     if (c == EOF)
1980       break;
1981     parse_c_expression (buf, 1);
1982     printf ("parser returned ");
1983     u = (unsigned HOST_WIDEST_INT) expression_value;
1984     if (expression_value < 0 && expression_signedp) {
1985       u = -u;
1986       printf ("-");
1987     }
1988     if (u == 0)
1989       printf ("0");
1990     else
1991       print_unsigned_host_widest_int (u);
1992     if (! expression_signedp)
1993       printf("u");
1994     printf ("\n");
1995   }
1996
1997   return 0;
1998 }
1999
2000 static void
2001 print_unsigned_host_widest_int (u)
2002      unsigned HOST_WIDEST_INT u;
2003 {
2004   if (u) {
2005     print_unsigned_host_widest_int (u / 10);
2006     putchar ('0' + (int) (u % 10));
2007   }
2008 }
2009
2010 /* table to tell if char can be part of a C identifier. */
2011 unsigned char is_idchar[256];
2012 /* table to tell if char can be first char of a c identifier. */
2013 unsigned char is_idstart[256];
2014 /* table to tell if c is horizontal or vertical space.  */
2015 unsigned char is_space[256];
2016
2017 /*
2018  * initialize random junk in the hash table and maybe other places
2019  */
2020 static void
2021 initialize_random_junk ()
2022 {
2023   register int i;
2024
2025   /*
2026    * Set up is_idchar and is_idstart tables.  These should be
2027    * faster than saying (is_alpha (c) || c == '_'), etc.
2028    * Must do set up these things before calling any routines tthat
2029    * refer to them.
2030    */
2031   for (i = 'a'; i <= 'z'; i++) {
2032     ++is_idchar[i - 'a' + 'A'];
2033     ++is_idchar[i];
2034     ++is_idstart[i - 'a' + 'A'];
2035     ++is_idstart[i];
2036   }
2037   for (i = '0'; i <= '9'; i++)
2038     ++is_idchar[i];
2039   ++is_idchar['_'];
2040   ++is_idstart['_'];
2041   ++is_idchar['$'];
2042   ++is_idstart['$'];
2043
2044   ++is_space[' '];
2045   ++is_space['\t'];
2046   ++is_space['\v'];
2047   ++is_space['\f'];
2048   ++is_space['\n'];
2049   ++is_space['\r'];
2050 }
2051
2052 void
2053 error VPROTO ((char * msgid, ...))
2054 {
2055 #ifndef ANSI_PROTOTYPES
2056   char * msgid;
2057 #endif
2058   va_list args;
2059
2060   VA_START (args, msgid);
2061
2062 #ifndef ANSI_PROTOTYPES
2063   msgid = va_arg (args, char *);
2064 #endif
2065
2066   fprintf (stderr, "error: ");
2067   vfprintf (stderr, _(msgid), args);
2068   fprintf (stderr, "\n");
2069   va_end (args);
2070 }
2071
2072 void
2073 pedwarn VPROTO ((char * msgid, ...))
2074 {
2075 #ifndef ANSI_PROTOTYPES
2076   char * msgid;
2077 #endif
2078   va_list args;
2079
2080   VA_START (args, msgid);
2081
2082 #ifndef ANSI_PROTOTYPES
2083   msgid = va_arg (args, char *);
2084 #endif
2085
2086   fprintf (stderr, "pedwarn: ");
2087   vfprintf (stderr, _(msgid), args);
2088   fprintf (stderr, "\n");
2089   va_end (args);
2090 }
2091
2092 void
2093 warning VPROTO ((char * msgid, ...))
2094 {
2095 #ifndef ANSI_PROTOTYPES
2096   char * msgid;
2097 #endif
2098   va_list args;
2099
2100   VA_START (args, msgid);
2101
2102 #ifndef ANSI_PROTOTYPES
2103   msgid = va_arg (args, char *);
2104 #endif
2105
2106   fprintf (stderr, "warning: ");
2107   vfprintf (stderr, _(msgid), args);
2108   fprintf (stderr, "\n");
2109   va_end (args);
2110 }
2111
2112
2113 int
2114 check_assertion (name, sym_length, tokens_specified, tokens)
2115      U_CHAR *name;
2116      int sym_length;
2117      int tokens_specified;
2118      struct arglist *tokens;
2119 {
2120   return 0;
2121 }
2122
2123 struct hashnode *
2124 lookup (name, len, hash)
2125      U_CHAR *name;
2126      int len;
2127      int hash;
2128 {
2129   return (DEFAULT_SIGNED_CHAR) ? 0 : ((struct hashnode *) -1);
2130 }
2131
2132 PTR
2133 xmalloc (size)
2134   size_t size;
2135 {
2136   return (PTR) malloc (size);
2137 }
2138 #endif