cexp.c

这是完整的gcc源代码

/*  A Bison parser, made from ./cexp.y  */

#define	INT	258
#define	CHAR	259
#define	NAME	260
#define	ERROR	261
#define	OR	262
#define	AND	263
#define	EQUAL	264
#define	NOTEQUAL	265
#define	LEQ	266
#define	GEQ	267
#define	LSH	268
#define	RSH	269
#define	UNARY	270

#line 26 "./cexp.y"

#include "config.h"
#include <setjmp.h>
/* #define YYDEBUG 1 */

  int yylex ();
  void yyerror ();
  int expression_value;

  static jmp_buf parse_return_error;

  /* some external tables of character types */
  extern unsigned char is_idstart[], is_idchar[];

#ifndef CHAR_TYPE_SIZE
#define CHAR_TYPE_SIZE BITS_PER_UNIT
#endif

#line 45 "./cexp.y"
typedef union {
  struct constant {long value; int unsignedp;} integer;
  int voidval;
  char *sval;
} YYSTYPE;

#ifndef YYLTYPE
typedef
  struct yyltype
 {
      int timestamp;
      int first_line;
      int first_column;
      int last_line;
      int last_column;
      char *text;
   }
 yyltype;

#define YYLTYPE yyltype
#endif

#include <stdio.h>

#ifndef __STDC__
#define const
#endif



#define	YYFINAL		61
#define	YYFLAG		-32768
#define	YYNTBASE	33

#define YYTRANSLATE(x) ((unsigned)(x) <= 270 ? yytranslate[x] : 36)

static const char yytranslate[] = {     0,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,    29,     2,     2,     2,    27,    14,     2,    31,
    32,    25,    23,     9,    24,     2,    26,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     8,     2,    17,
     2,    18,     7,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,    13,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,    12,     2,    30,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     1,     2,     3,     4,     5,
     6,    10,    11,    15,    16,    19,    20,    21,    22,    28
};

static const short yyprhs[] = {     0,
     0,     2,     4,     8,    11,    14,    17,    20,    24,    28,
    32,    36,    40,    44,    48,    52,    56,    60,    64,    68,
    72,    76,    80,    84,    88,    92,    96,   102,   104,   106
};

static const short yyrhs[] = {    34,
     0,    35,     0,    34,     9,    35,     0,    24,    35,     0,
    29,    35,     0,    23,    35,     0,    30,    35,     0,    31,
    34,    32,     0,    35,    25,    35,     0,    35,    26,    35,
     0,    35,    27,    35,     0,    35,    23,    35,     0,    35,
    24,    35,     0,    35,    21,    35,     0,    35,    22,    35,
     0,    35,    15,    35,     0,    35,    16,    35,     0,    35,
    19,    35,     0,    35,    20,    35,     0,    35,    17,    35,
     0,    35,    18,    35,     0,    35,    14,    35,     0,    35,
    13,    35,     0,    35,    12,    35,     0,    35,    11,    35,
     0,    35,    10,    35,     0,    35,     7,    35,     8,    35,
     0,     3,     0,     4,     0,     5,     0
};

#if YYDEBUG != 0
static const short yyrline[] = { 0,
    74,    79,    80,    85,    88,    91,    93,    96,   101,   107,
   118,   129,   132,   135,   141,   147,   150,   153,   159,   165,
   171,   177,   180,   183,   186,   189,   192,   195,   197,   199
};

static const char * const yytname[] = {   "$",
"error","$illegal.","INT","CHAR","NAME","ERROR","'?'","':'","','","OR",
"AND","'|'","'^'","'&'","EQUAL","NOTEQUAL","'<'","'>'","LEQ","GEQ",
"LSH","RSH","'+'","'-'","'*'","'/'","'%'","UNARY","'!'","'~'",
"'('","')'","start","exp1","exp",""
};
#endif

static const short yyr1[] = {     0,
    33,    34,    34,    35,    35,    35,    35,    35,    35,    35,
    35,    35,    35,    35,    35,    35,    35,    35,    35,    35,
    35,    35,    35,    35,    35,    35,    35,    35,    35,    35
};

static const short yyr2[] = {     0,
     1,     1,     3,     2,     2,     2,     2,     3,     3,     3,
     3,     3,     3,     3,     3,     3,     3,     3,     3,     3,
     3,     3,     3,     3,     3,     3,     5,     1,     1,     1
};

static const short yydefact[] = {     0,
    28,    29,    30,     0,     0,     0,     0,     0,     1,     2,
     6,     4,     5,     7,     0,     0,     0,     0,     0,     0,
     0,     0,     0,     0,     0,     0,     0,     0,     0,     0,
     0,     0,     0,     0,     0,     8,     3,     0,    26,    25,
    24,    23,    22,    16,    17,    20,    21,    18,    19,    14,
    15,    12,    13,     9,    10,    11,     0,    27,     0,     0,
     0
};

static const short yydefgoto[] = {    59,
     9,    10
};

static const short yypact[] = {    31,
-32768,-32768,-32768,    31,    31,    31,    31,    31,     1,    77,
-32768,-32768,-32768,-32768,     0,    31,    31,    31,    31,    31,
    31,    31,    31,    31,    31,    31,    31,    31,    31,    31,
    31,    31,    31,    31,    31,-32768,    77,    56,    94,    25,
   109,   123,   136,   147,   147,   154,   154,   154,   154,   -19,
   -19,    32,    32,-32768,-32768,-32768,    31,    77,    11,    33,
-32768
};

static const short yypgoto[] = {-32768,
    48,    -4
};


#define	YYLAST		181


static const short yytable[] = {    11,
    12,    13,    14,    31,    32,    33,    34,    35,    16,    16,
    60,    37,    38,    39,    40,    41,    42,    43,    44,    45,
    46,    47,    48,    49,    50,    51,    52,    53,    54,    55,
    56,    36,    61,     1,     2,     3,    20,    21,    22,    23,
    24,    25,    26,    27,    28,    29,    30,    31,    32,    33,
    34,    35,    58,     4,     5,    15,    33,    34,    35,     6,
     7,     8,    17,    57,     0,    18,    19,    20,    21,    22,
    23,    24,    25,    26,    27,    28,    29,    30,    31,    32,
    33,    34,    35,    17,     0,     0,    18,    19,    20,    21,
    22,    23,    24,    25,    26,    27,    28,    29,    30,    31,
    32,    33,    34,    35,    19,    20,    21,    22,    23,    24,
    25,    26,    27,    28,    29,    30,    31,    32,    33,    34,
    35,    21,    22,    23,    24,    25,    26,    27,    28,    29,
    30,    31,    32,    33,    34,    35,    22,    23,    24,    25,
    26,    27,    28,    29,    30,    31,    32,    33,    34,    35,
    23,    24,    25,    26,    27,    28,    29,    30,    31,    32,
    33,    34,    35,    25,    26,    27,    28,    29,    30,    31,
    32,    33,    34,    35,    29,    30,    31,    32,    33,    34,
    35
};

static const short yycheck[] = {     4,
     5,     6,     7,    23,    24,    25,    26,    27,     9,     9,
     0,    16,    17,    18,    19,    20,    21,    22,    23,    24,
    25,    26,    27,    28,    29,    30,    31,    32,    33,    34,
    35,    32,     0,     3,     4,     5,    12,    13,    14,    15,
    16,    17,    18,    19,    20,    21,    22,    23,    24,    25,
    26,    27,    57,    23,    24,     8,    25,    26,    27,    29,
    30,    31,     7,     8,    -1,    10,    11,    12,    13,    14,
    15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
    25,    26,    27,     7,    -1,    -1,    10,    11,    12,    13,
    14,    15,    16,    17,    18,    19,    20,    21,    22,    23,
    24,    25,    26,    27,    11,    12,    13,    14,    15,    16,
    17,    18,    19,    20,    21,    22,    23,    24,    25,    26,
    27,    13,    14,    15,    16,    17,    18,    19,    20,    21,
    22,    23,    24,    25,    26,    27,    14,    15,    16,    17,
    18,    19,    20,    21,    22,    23,    24,    25,    26,    27,
    15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
    25,    26,    27,    17,    18,    19,    20,    21,    22,    23,
    24,    25,    26,    27,    21,    22,    23,    24,    25,    26,
    27
};
/* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
#line 3 "bison.simple"

/* Skeleton output parser for bison,
   Copyright (C) 1984, 1989, 1990 Bob Corbett and Richard Stallman

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 1, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */


#ifndef alloca
#ifdef __GNUC__
#define alloca __builtin_alloca
#else /* Not GNU C.  */
#if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__)
#include <alloca.h>
#else /* Not sparc */
#ifdef MSDOS
#include <malloc.h>
#endif /* MSDOS */
#endif /* Not sparc.  */
#endif /* Not GNU C.  */
#endif /* alloca not defined.  */

/* This is the parser code that is written into each bison parser
  when the %semantic_parser declaration is not specified in the grammar.
  It was written by Richard Stallman by simplifying the hairy parser
  used when %semantic_parser is specified.  */

/* Note: there must be only one dollar sign in this file.
   It is replaced by the list of actions, each action
   as one case of the switch.  */

#define yyerrok		(yyerrstatus = 0)
#define yyclearin	(yychar = YYEMPTY)
#define YYEMPTY		-2
#define YYEOF		0
#define YYACCEPT	return(0)
#define YYABORT 	return(1)
#define YYERROR		goto yyerrlab1
/* Like YYERROR except do call yyerror.
   This remains here temporarily to ease the
   transition to the new meaning of YYERROR, for GCC.
   Once GCC version 2 has supplanted version 1, this can go.  */
#define YYFAIL		goto yyerrlab
#define YYRECOVERING()  (!!yyerrstatus)
#define YYBACKUP(token, value) \
do								\
  if (yychar == YYEMPTY && yylen == 1)				\
    { yychar = (token), yylval = (value);			\
      yychar1 = YYTRANSLATE (yychar);				\
      YYPOPSTACK;						\
      goto yybackup;						\
    }								\
  else								\
    { yyerror ("syntax error: cannot back up"); YYERROR; }	\
while (0)

#define YYTERROR	1
#define YYERRCODE	256

#ifndef YYPURE
#define YYLEX		yylex()
#endif

#ifdef YYPURE
#ifdef YYLSP_NEEDED
#define YYLEX		yylex(&yylval, &yylloc)
#else
#define YYLEX		yylex(&yylval)
#endif
#endif

/* If nonreentrant, generate the variables here */

#ifndef YYPURE

int	yychar;			/*  the lookahead symbol		*/
YYSTYPE	yylval;			/*  the semantic value of the		*/
				/*  lookahead symbol			*/

#ifdef YYLSP_NEEDED
YYLTYPE yylloc;			/*  location data for the lookahead	*/
				/*  symbol				*/
#endif

int yynerrs;			/*  number of parse errors so far       */
#endif  /* not YYPURE */

#if YYDEBUG != 0
int yydebug;			/*  nonzero means print parse trace	*/
/* Since this is uninitialized, it does not stop multiple parsers
   from coexisting.  */
#endif

/*  YYINITDEPTH indicates the initial size of the parser's stacks	*/

#ifndef	YYINITDEPTH
#define YYINITDEPTH 200
#endif

/*  YYMAXDEPTH is the maximum size the stacks can grow to
    (effective only if the built-in stack extension method is used).  */

#if YYMAXDEPTH == 0
#undef YYMAXDEPTH
#endif

#ifndef YYMAXDEPTH
#define YYMAXDEPTH 10000
#endif

#ifndef __cplusplus

/* This is the most reliable way to avoid incompatibilities
   in available built-in functions on various systems.  */
static void
__yy_bcopy (from, to, count)
     char *from;
     char *to;
     int count;
{
  register char *f = from;
  register char *t = to;
  register int i = count;

  while (i-- > 0)
    *t++ = *f++;
}

#else /* __cplusplus */

/* This is the most reliable way to avoid incompatibilities
   in available built-in functions on various systems.  */
static void
__yy_bcopy (char *from, char *to, int count)
{
  register char *f = from;
  register char *t = to;
  register int i = count;

  while (i-- > 0)
    *t++ = *f++;
}

#endif

#line 160 "bison.simple"
int
yyparse()
{
  register int yystate;
  register int yyn;
  register short *yyssp;
  register YYSTYPE *yyvsp;
  int yyerrstatus;	/*  number of tokens to shift before error messages enabled */
  int yychar1;		/*  lookahead token as an internal (translated) token number */

  short	yyssa[YYINITDEPTH];	/*  the state stack			*/
  YYSTYPE yyvsa[YYINITDEPTH];	/*  the semantic value stack		*/

  short *yyss = yyssa;		/*  refer to the stacks thru separate pointers */
  YYSTYPE *yyvs = yyvsa;	/*  to allow yyoverflow to reallocate them elsewhere */

#ifdef YYLSP_NEEDED
  YYLTYPE *yyls = yylsa;
  YYLTYPE *yylsp;
  YYLTYPE yylsa[YYINITDEPTH];	/*  the location stack			*/

#define YYPOPSTACK   (yyvsp--, yysp--, yylsp--)
#else
#define YYPOPSTACK   (yyvsp--, yysp--)
#endif

  int yystacksize = YYINITDEPTH;

#ifdef YYPURE
  int yychar;
  YYSTYPE yylval;
  int yynerrs;
#ifdef YYLSP_NEEDED
  YYLTYPE yylloc;
#endif
#endif

  YYSTYPE yyval;		/*  the variable used to return		*/
				/*  semantic values from the action	*/
				/*  routines				*/

  int yylen;

#if YYDEBUG != 0
  if (yydebug)
    fprintf(stderr, "Starting parse\n");
#endif

  yystate = 0;
  yyerrstatus = 0;
  yynerrs = 0;
  yychar = YYEMPTY;		/* Cause a token to be read.  */

  /* Initialize stack pointers.
     Waste one element of value and location stack
     so that they stay on the same level as the state stack.  */

  yyssp = yyss - 1;
  yyvsp = yyvs;
#ifdef YYLSP_NEEDED
  yylsp = yyls;
#endif

/* Push a new state, which is found in  yystate  .  */
/* In all cases, when you get here, the value and location stacks
   have just been pushed. so pushing a state here evens the stacks.  */
yynewstate:

  *++yyssp = yystate;

  if (yyssp >= yyss + yystacksize - 1)
    {
      /* Give user a chance to reallocate the stack */
      /* Use copies of these so that the &'s don't force the real ones into memory. */
      YYSTYPE *yyvs1 = yyvs;
      short *yyss1 = yyss;
#ifdef YYLSP_NEEDED
      YYLTYPE *yyls1 = yyls;
#endif

      /* Get the current used size of the three stacks, in elements.  */
      int size = yyssp - yyss + 1;

#ifdef yyoverflow
      /* Each stack pointer address is followed by the size of
	 the data in use in that stack, in bytes.  */
      yyoverflow("parser stack overflow",
		 &yyss1, size * sizeof (*yyssp),
		 &yyvs1, size * sizeof (*yyvsp),
#ifdef YYLSP_NEEDED
		 &yyls1, size * sizeof (*yylsp),
#endif
		 &yystacksize);

      yyss = yyss1; yyvs = yyvs1;
#ifdef YYLSP_NEEDED
      yyls = yyls1;
#endif
#else /* no yyoverflow */
      /* Extend the stack our own way.  */
      if (yystacksize >= YYMAXDEPTH)
	{
	  yyerror("parser stack overflow");
	  return 2;
	}
      yystacksize *= 2;