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getdate.c

/*  A Bison parser, made from getdate.y
    by GNU Bison version 1.28  */

#define YYBISON 1  /* Identify Bison output.  */

#define     tAGO  257
#define     tDAY  258
#define     tDAY_UNIT   259
#define     tDAYZONE    260
#define     tDST  261
#define     tHOUR_UNIT  262
#define     tID   263
#define     tMERIDIAN   264
#define     tMINUTE_UNIT      265
#define     tMONTH      266
#define     tMONTH_UNIT 267
#define     tSEC_UNIT   268
#define     tSNUMBER    269
#define     tUNUMBER    270
#define     tYEAR_UNIT  271
#define     tZONE 272

#line 1 "getdate.y"

/*
**  Originally written by Steven M. Bellovin <smb@research.att.com> while
**  at the University of North Carolina at Chapel Hill.  Later tweaked by
**  a couple of people on Usenet.  Completely overhauled by Rich $alz
**  <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990;
**
**  This grammar has 13 shift/reduce conflicts.
**
**  This code is in the public domain and has no copyright.
*/

#ifdef HAVE_CONFIG_H
# include <config.h>
# include "xalloca.h"
#endif

/* Since the code of getdate.y is not included in the Emacs executable
   itself, there is no need to #define static in this file.  Even if
   the code were included in the Emacs executable, it probably
   wouldn't do any harm to #undef it here; this will only cause
   problems if we try to write to a static variable, which I don't
   think this code needs to do.  */
#ifdef emacs
# undef static
#endif

#include <stdio.h>
#include <ctype.h>

#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif

#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
# define IN_CTYPE_DOMAIN(c) 1
#else
# define IN_CTYPE_DOMAIN(c) isascii(c)
#endif

#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
#define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))

/* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
   - Its arg may be any int or unsigned int; it need not be an unsigned char.
   - It's guaranteed to evaluate its argument exactly once.
   - It's typically faster.
   Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
   only '0' through '9' are digits.  Prefer ISDIGIT to ISDIGIT_LOCALE unless
   it's important to use the locale's definition of `digit' even when the
   host does not conform to Posix.  */
#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)

#include "getdate.h"

#if defined (STDC_HEADERS) || defined (USG)
# include <string.h>
#endif

/* Some old versions of bison generate parsers that use bcopy.
   That loses on systems that don't provide the function, so we have
   to redefine it here.  */
#if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy)
# define bcopy(from, to, len) memcpy ((to), (from), (len))
#endif

extern struct tm  *gmtime ();
extern struct tm  *localtime ();
extern time_t           mktime ();

/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
   as well as gratuitiously global symbol names, so we can have multiple
   yacc generated parsers in the same program.  Note that these are only
   the variables produced by yacc.  If other parser generators (bison,
   byacc, etc) produce additional global names that conflict at link time,
   then those parser generators need to be fixed instead of adding those
   names to this list. */

#define yymaxdepth gd_maxdepth
#define yyparse gd_parse
#define yylex   gd_lex
#define yyerror gd_error
#define yylval  gd_lval
#define yychar  gd_char
#define yydebug gd_debug
#define yypact  gd_pact
#define yyr1    gd_r1
#define yyr2    gd_r2
#define yydef   gd_def
#define yychk   gd_chk
#define yypgo   gd_pgo
#define yyact   gd_act
#define yyexca  gd_exca
#define yyerrflag gd_errflag
#define yynerrs gd_nerrs
#define yyps    gd_ps
#define yypv    gd_pv
#define yys     gd_s
#define yy_yys  gd_yys
#define yystate gd_state
#define yytmp   gd_tmp
#define yyv     gd_v
#define yy_yyv  gd_yyv
#define yyval   gd_val
#define yylloc  gd_lloc
#define yyreds  gd_reds          /* With YYDEBUG defined */
#define yytoks  gd_toks          /* With YYDEBUG defined */
#define yylhs   gd_yylhs
#define yylen   gd_yylen
#define yydefred gd_yydefred
#define yydgoto gd_yydgoto
#define yysindex gd_yysindex
#define yyrindex gd_yyrindex
#define yygindex gd_yygindex
#define yytable  gd_yytable
#define yycheck  gd_yycheck

static int yylex ();
static int yyerror ();

#define YYERROR_VERBOSE

#define EPOCH           1970
#define HOUR(x)         ((x) * 60)

#define MAX_BUFF_LEN    128   /* size of buffer to read the date into */

/*
**  An entry in the lexical lookup table.
*/
typedef struct _TABLE {
    const char    *name;
    int           type;
    int           value;
} TABLE;


/*
**  Meridian:  am, pm, or 24-hour style.
*/
typedef enum _MERIDIAN {
    MERam, MERpm, MER24
} MERIDIAN;


/*
**  Global variables.  We could get rid of most of these by using a good
**  union as the yacc stack.  (This routine was originally written before
**  yacc had the %union construct.)  Maybe someday; right now we only use
**  the %union very rarely.
*/
static const char *yyInput;
static int  yyDayOrdinal;
static int  yyDayNumber;
static int  yyHaveDate;
static int  yyHaveDay;
static int  yyHaveRel;
static int  yyHaveTime;
static int  yyHaveZone;
static int  yyTimezone;
static int  yyDay;
static int  yyHour;
static int  yyMinutes;
static int  yyMonth;
static int  yySeconds;
static int  yyYear;
static MERIDIAN   yyMeridian;
static int  yyRelDay;
static int  yyRelHour;
static int  yyRelMinutes;
static int  yyRelMonth;
static int  yyRelSeconds;
static int  yyRelYear;


#line 179 "getdate.y"
typedef union {
    int                 Number;
    enum _MERIDIAN      Meridian;
} YYSTYPE;
#include <stdio.h>

#ifndef __cplusplus
#ifndef __STDC__
#define const
#endif
#endif



#define     YYFINAL           61
#define     YYFLAG            -32768
#define     YYNTBASE    22

#define YYTRANSLATE(x) ((unsigned)(x) <= 272 ? yytranslate[x] : 32)

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,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,    20,     2,     2,    21,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,    19,     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,     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,     3,     4,     5,     6,
     7,     8,     9,    10,    11,    12,    13,    14,    15,    16,
    17,    18
};

#if YYDEBUG != 0
static const short yyprhs[] = {     0,
     0,     1,     4,     6,     8,    10,    12,    14,    16,    19,
    24,    29,    36,    43,    45,    47,    50,    52,    55,    58,
    62,    68,    72,    76,    79,    84,    87,    91,    94,    96,
    99,   102,   104,   107,   110,   112,   115,   118,   120,   123,
   126,   128,   131,   134,   136,   139,   142,   144,   146,   147
};

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

#endif

#if YYDEBUG != 0
static const short yyrline[] = { 0,
   195,   196,   199,   202,   205,   208,   211,   214,   217,   223,
   229,   238,   244,   256,   259,   262,   268,   272,   276,   282,
   286,   304,   310,   316,   320,   325,   329,   336,   344,   347,
   350,   353,   356,   359,   362,   365,   368,   371,   374,   377,
   380,   383,   386,   389,   392,   395,   398,   403,   436,   440
};
#endif


#if YYDEBUG != 0 || defined (YYERROR_VERBOSE)

static const char * const yytname[] = {   "$","error","$undefined.","tAGO","tDAY",
"tDAY_UNIT","tDAYZONE","tDST","tHOUR_UNIT","tID","tMERIDIAN","tMINUTE_UNIT",
"tMONTH","tMONTH_UNIT","tSEC_UNIT","tSNUMBER","tUNUMBER","tYEAR_UNIT","tZONE",
"':'","','","'/'","spec","item","time","zone","day","date","rel","relunit","number",
"o_merid", NULL
};
#endif

static const short yyr1[] = {     0,
    22,    22,    23,    23,    23,    23,    23,    23,    24,    24,
    24,    24,    24,    25,    25,    25,    26,    26,    26,    27,
    27,    27,    27,    27,    27,    27,    27,    28,    28,    29,
    29,    29,    29,    29,    29,    29,    29,    29,    29,    29,
    29,    29,    29,    29,    29,    29,    29,    30,    31,    31
};

static const short yyr2[] = {     0,
     0,     2,     1,     1,     1,     1,     1,     1,     2,     4,
     4,     6,     6,     1,     1,     2,     1,     2,     2,     3,
     5,     3,     3,     2,     4,     2,     3,     2,     1,     2,
     2,     1,     2,     2,     1,     2,     2,     1,     2,     2,
     1,     2,     2,     1,     2,     2,     1,     1,     0,     1
};

static const short yydefact[] = {     1,
     0,    17,    38,    15,    41,    44,     0,    35,    47,     0,
    48,    32,    14,     2,     3,     4,     6,     5,     7,    29,
     8,    18,    24,    37,    40,    43,    34,    46,    31,    19,
    36,    39,     9,    42,    26,    33,    45,     0,    30,     0,
     0,    16,    28,     0,    23,    27,    22,    49,    20,    25,
    50,    11,     0,    10,     0,    49,    21,    13,    12,     0,
     0
};

static const short yydefgoto[] = {     1,
    14,    15,    16,    17,    18,    19,    20,    21,    54
};

static const short yypact[] = {-32768,
     0,   -19,-32768,-32768,-32768,-32768,   -13,-32768,-32768,    30,
    15,-32768,    14,-32768,-32768,-32768,-32768,-32768,-32768,    19,
-32768,-32768,     4,-32768,-32768,-32768,-32768,-32768,-32768,-32768,
-32768,-32768,-32768,-32768,    -6,-32768,-32768,    16,-32768,    17,
    23,-32768,-32768,    24,-32768,-32768,-32768,    27,    28,-32768,
-32768,-32768,    29,-32768,    32,    -8,-32768,-32768,-32768,    50,
-32768
};

static const short yypgoto[] = {-32768,
-32768,-32768,-32768,-32768,-32768,-32768,-32768,-32768,    -5
};


#define     YYLAST            51


static const short yytable[] = {    60,
    22,    51,    23,     2,     3,     4,    58,     5,    45,    46,
     6,     7,     8,     9,    10,    11,    12,    13,    30,    31,
    42,    43,    32,    44,    33,    34,    35,    36,    37,    38,
    47,    39,    48,    40,    24,    41,    51,    25,    49,    50,
    26,    52,    27,    28,    56,    53,    29,    57,    55,    61,
    59
};

static const short yycheck[] = {     0,
    20,    10,    16,     4,     5,     6,    15,     8,    15,    16,
    11,    12,    13,    14,    15,    16,    17,    18,     4,     5,
     7,     3,     8,    20,    10,    11,    12,    13,    14,    15,
    15,    17,    16,    19,     5,    21,    10,     8,    16,    16,
    11,    15,    13,    14,    16,    19,    17,    16,    21,     0,
    56
};
/* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
#line 3 "/usr/local/share/bison.simple"
/* This file comes from bison-1.28.  */

/* Skeleton output parser for bison,
   Copyright (C) 1984, 1989, 1990 Free Software Foundation, Inc.

   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 2, 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* As a special exception, when this file is copied by Bison into a
   Bison output file, you may use that output file without restriction.
   This special exception was added by the Free Software Foundation
   in version 1.24 of Bison.  */

/* 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.  */

#ifndef YYSTACK_USE_ALLOCA
#ifdef alloca
#define YYSTACK_USE_ALLOCA
#else /* alloca not defined */
#ifdef __GNUC__
#define YYSTACK_USE_ALLOCA
#define alloca __builtin_alloca
#else /* not GNU C.  */
#if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi) || (defined (__sun) && defined (__i386))
#define YYSTACK_USE_ALLOCA
#include <alloca.h>
#else /* not sparc */
/* We think this test detects Watcom and Microsoft C.  */
/* This used to test MSDOS, but that is a bad idea
   since that symbol is in the user namespace.  */
#if (defined (_MSDOS) || defined (_MSDOS_)) && !defined (__TURBOC__)
#if 0 /* No need for malloc.h, which pollutes the namespace;
       instead, just don't use alloca.  */
#include <malloc.h>
#endif
#else /* not MSDOS, or __TURBOC__ */
#if defined(_AIX)
/* I don't know what this was needed for, but it pollutes the namespace.
   So I turned it off.   rms, 2 May 1997.  */
/* #include <malloc.h>  */
 #pragma alloca
#define YYSTACK_USE_ALLOCA
#else /* not MSDOS, or __TURBOC__, or _AIX */
#if 0
#ifdef __hpux /* haible@ilog.fr says this works for HPUX 9.05 and up,
             and on HPUX 10.  Eventually we can turn this on.  */
#define YYSTACK_USE_ALLOCA
#define alloca __builtin_alloca
#endif /* __hpux */
#endif
#endif /* not _AIX */
#endif /* not MSDOS, or __TURBOC__ */
#endif /* not sparc */
#endif /* not GNU C */
#endif /* alloca not defined */
#endif /* YYSTACK_USE_ALLOCA not defined */

#ifdef YYSTACK_USE_ALLOCA
#define YYSTACK_ALLOC alloca
#else
#define YYSTACK_ALLOC malloc
#endif

/* 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  goto yyacceptlab
#define YYABORT   goto yyabortlab
#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
#ifdef YYLEX_PARAM
#define YYLEX           yylex(&yylval, &yylloc, YYLEX_PARAM)
#else
#define YYLEX           yylex(&yylval, &yylloc)
#endif
#else /* not YYLSP_NEEDED */
#ifdef YYLEX_PARAM
#define YYLEX           yylex(&yylval, YYLEX_PARAM)
#else
#define YYLEX           yylex(&yylval)
#endif
#endif /* not YYLSP_NEEDED */
#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

/* Define __yy_memcpy.  Note that the size argument
   should be passed with type unsigned int, because that is what the non-GCC
   definitions require.  With GCC, __builtin_memcpy takes an arg
   of type size_t, but it can handle unsigned int.  */

#if __GNUC__ > 1        /* GNU C and GNU C++ define this.  */
#define __yy_memcpy(TO,FROM,COUNT)  __builtin_memcpy(TO,FROM,COUNT)
#else                   /* not GNU C or C++ */
#ifndef __cplusplus

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

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

#endif
#endif

#line 217 "/usr/local/share/bison.simple"

/* The user can define YYPARSE_PARAM as the name of an argument to be passed
   into yyparse.  The argument should have type void *.
   It should actually point to an object.
   Grammar actions can access the variable by casting it
   to the proper pointer type.  */

#ifdef YYPARSE_PARAM
#ifdef __cplusplus
#define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
#define YYPARSE_PARAM_DECL
#else /* not __cplusplus */
#define YYPARSE_PARAM_ARG YYPARSE_PARAM
#define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
#endif /* not __cplusplus */
#else /* not YYPARSE_PARAM */
#define YYPARSE_PARAM_ARG
#define YYPARSE_PARAM_DECL
#endif /* not YYPARSE_PARAM */

/* Prevent warning if -Wstrict-prototypes.  */
#ifdef __GNUC__
#ifdef YYPARSE_PARAM
int yyparse (void *);
#else
int yyparse (void);
#endif
#endif

int
yyparse(YYPARSE_PARAM_ARG)
     YYPARSE_PARAM_DECL
{
  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 = 0;            /*  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 yylsa[YYINITDEPTH]; /*  the location stack              */
  YYLTYPE *yyls = yylsa;
  YYLTYPE *yylsp;

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

  int yystacksize = YYINITDEPTH;
  int yyfree_stacks = 0;

#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.
     The wasted elements are never initialized.  */

  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.  */
#ifdef YYLSP_NEEDED
      /* This used to be a conditional around just the two extra args,
       but that might be undefined if yyoverflow is a macro.  */
      yyoverflow("parser stack overflow",
             &yyss1, size * sizeof (*yyssp),
             &yyvs1, size * sizeof (*yyvsp),
             &yyls1, size * sizeof (*yylsp),
             &yystacksize);
#else
      yyoverflow("parser stack overflow",
             &yyss1, size * sizeof (*yyssp),
             &yyvs1, size * sizeof (*yyvsp),
             &yystacksize);
#endif

      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");
        if (yyfree_stacks)
          {
            free (yyss);
            free (yyvs);
#ifdef YYLSP_NEEDED
            free (yyls);
#endif
          }
        return 2;
      }
      yystacksize *= 2;
      if (yystacksize > YYMAXDEPTH)
      yystacksize = YYMAXDEPTH;
#ifndef YYSTACK_USE_ALLOCA
      yyfree_stacks = 1;
#endif
      yyss = (short *) YYSTACK_ALLOC (yystacksize * sizeof (*yyssp));
      __yy_memcpy ((char *)yyss, (char *)yyss1,
               size * (unsigned int) sizeof (*yyssp));
      yyvs = (YYSTYPE *) YYSTACK_ALLOC (yystacksize * sizeof (*yyvsp));
      __yy_memcpy ((char *)yyvs, (char *)yyvs1,
               size * (unsigned int) sizeof (*yyvsp));
#ifdef YYLSP_NEEDED
      yyls = (YYLTYPE *) YYSTACK_ALLOC (yystacksize * sizeof (*yylsp));
      __yy_memcpy ((char *)yyls, (char *)yyls1,
               size * (unsigned int) sizeof (*yylsp));
#endif
#endif /* no yyoverflow */

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

#if YYDEBUG != 0
      if (yydebug)
      fprintf(stderr, "Stack size increased to %d\n", yystacksize);
#endif

      if (yyssp >= yyss + yystacksize - 1)
      YYABORT;
    }

#if YYDEBUG != 0
  if (yydebug)
    fprintf(stderr, "Entering state %d\n", yystate);
#endif

  goto yybackup;
 yybackup:

/* Do appropriate processing given the current state.  */
/* Read a lookahead token if we need one and don't already have one.  */
/* yyresume: */

  /* First try to decide what to do without reference to lookahead token.  */

  yyn = yypact[yystate];
  if (yyn == YYFLAG)
    goto yydefault;

  /* Not known => get a lookahead token if don't already have one.  */

  /* yychar is either YYEMPTY or YYEOF
     or a valid token in external form.  */

  if (yychar == YYEMPTY)
    {
#if YYDEBUG != 0
      if (yydebug)
      fprintf(stderr, "Reading a token: ");
#endif
      yychar = YYLEX;
    }

  /* Convert token to internal form (in yychar1) for indexing tables with */

  if (yychar <= 0)            /* This means end of input. */
    {
      yychar1 = 0;
      yychar = YYEOF;         /* Don't call YYLEX any more */

#if YYDEBUG != 0
      if (yydebug)
      fprintf(stderr, "Now at end of input.\n");
#endif
    }
  else
    {
      yychar1 = YYTRANSLATE(yychar);

#if YYDEBUG != 0
      if (yydebug)
      {
        fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
        /* Give the individual parser a way to print the precise meaning
           of a token, for further debugging info.  */
#ifdef YYPRINT
        YYPRINT (stderr, yychar, yylval);
#endif
        fprintf (stderr, ")\n");
      }
#endif
    }

  yyn += yychar1;
  if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
    goto yydefault;

  yyn = yytable[yyn];

  /* yyn is what to do for this token type in this state.
     Negative => reduce, -yyn is rule number.
     Positive => shift, yyn is new state.
       New state is final state => don't bother to shift,
       just return success.
     0, or most negative number => error.  */

  if (yyn < 0)
    {
      if (yyn == YYFLAG)
      goto yyerrlab;
      yyn = -yyn;
      goto yyreduce;
    }
  else if (yyn == 0)
    goto yyerrlab;

  if (yyn == YYFINAL)
    YYACCEPT;

  /* Shift the lookahead token.  */

#if YYDEBUG != 0
  if (yydebug)
    fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]);
#endif

  /* Discard the token being shifted unless it is eof.  */
  if (yychar != YYEOF)
    yychar = YYEMPTY;

  *++yyvsp = yylval;
#ifdef YYLSP_NEEDED
  *++yylsp = yylloc;
#endif

  /* count tokens shifted since error; after three, turn off error status.  */
  if (yyerrstatus) yyerrstatus--;

  yystate = yyn;
  goto yynewstate;

/* Do the default action for the current state.  */
yydefault:

  yyn = yydefact[yystate];
  if (yyn == 0)
    goto yyerrlab;

/* Do a reduction.  yyn is the number of a rule to reduce with.  */
yyreduce:
  yylen = yyr2[yyn];
  if (yylen > 0)
    yyval = yyvsp[1-yylen]; /* implement default value of the action */

#if YYDEBUG != 0
  if (yydebug)
    {
      int i;

      fprintf (stderr, "Reducing via rule %d (line %d), ",
             yyn, yyrline[yyn]);

      /* Print the symbols being reduced, and their result.  */
      for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
      fprintf (stderr, "%s ", yytname[yyrhs[i]]);
      fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
    }
#endif


  switch (yyn) {

case 3:
#line 199 "getdate.y"
{
          yyHaveTime++;
      ;
    break;}
case 4:
#line 202 "getdate.y"
{
          yyHaveZone++;
      ;
    break;}
case 5:
#line 205 "getdate.y"
{
          yyHaveDate++;
      ;
    break;}
case 6:
#line 208 "getdate.y"
{
          yyHaveDay++;
      ;
    break;}
case 7:
#line 211 "getdate.y"
{
          yyHaveRel++;
      ;
    break;}
case 9:
#line 217 "getdate.y"
{
          yyHour = yyvsp[-1].Number;
          yyMinutes = 0;
          yySeconds = 0;
          yyMeridian = yyvsp[0].Meridian;
      ;
    break;}
case 10:
#line 223 "getdate.y"
{
          yyHour = yyvsp[-3].Number;
          yyMinutes = yyvsp[-1].Number;
          yySeconds = 0;
          yyMeridian = yyvsp[0].Meridian;
      ;
    break;}
case 11:
#line 229 "getdate.y"
{
          yyHour = yyvsp[-3].Number;
          yyMinutes = yyvsp[-1].Number;
          yyMeridian = MER24;
          yyHaveZone++;
          yyTimezone = (yyvsp[0].Number < 0
                    ? -yyvsp[0].Number % 100 + (-yyvsp[0].Number / 100) * 60
                    : - (yyvsp[0].Number % 100 + (yyvsp[0].Number / 100) * 60));
      ;
    break;}
case 12:
#line 238 "getdate.y"
{
          yyHour = yyvsp[-5].Number;
          yyMinutes = yyvsp[-3].Number;
          yySeconds = yyvsp[-1].Number;
          yyMeridian = yyvsp[0].Meridian;
      ;
    break;}
case 13:
#line 244 "getdate.y"
{
          yyHour = yyvsp[-5].Number;
          yyMinutes = yyvsp[-3].Number;
          yySeconds = yyvsp[-1].Number;
          yyMeridian = MER24;
          yyHaveZone++;
          yyTimezone = (yyvsp[0].Number < 0
                    ? -yyvsp[0].Number % 100 + (-yyvsp[0].Number / 100) * 60
                    : - (yyvsp[0].Number % 100 + (yyvsp[0].Number / 100) * 60));
      ;
    break;}
case 14:
#line 256 "getdate.y"
{
          yyTimezone = yyvsp[0].Number;
      ;
    break;}
case 15:
#line 259 "getdate.y"
{
          yyTimezone = yyvsp[0].Number - 60;
      ;
    break;}
case 16:
#line 263 "getdate.y"
{
          yyTimezone = yyvsp[-1].Number - 60;
      ;
    break;}
case 17:
#line 268 "getdate.y"
{
          yyDayOrdinal = 1;
          yyDayNumber = yyvsp[0].Number;
      ;
    break;}
case 18:
#line 272 "getdate.y"
{
          yyDayOrdinal = 1;
          yyDayNumber = yyvsp[-1].Number;
      ;
    break;}
case 19:
#line 276 "getdate.y"
{
          yyDayOrdinal = yyvsp[-1].Number;
          yyDayNumber = yyvsp[0].Number;
      ;
    break;}
case 20:
#line 282 "getdate.y"
{
          yyMonth = yyvsp[-2].Number;
          yyDay = yyvsp[0].Number;
      ;
    break;}
case 21:
#line 286 "getdate.y"
{
        /* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY.
           The goal in recognizing YYYY/MM/DD is solely to support legacy
           machine-generated dates like those in an RCS log listing.  If
           you want portability, use the ISO 8601 format.  */
        if (yyvsp[-4].Number >= 1000)
          {
            yyYear = yyvsp[-4].Number;
            yyMonth = yyvsp[-2].Number;
            yyDay = yyvsp[0].Number;
          }
        else
          {
            yyMonth = yyvsp[-4].Number;
            yyDay = yyvsp[-2].Number;
            yyYear = yyvsp[0].Number;
          }
      ;
    break;}
case 22:
#line 304 "getdate.y"
{
          /* ISO 8601 format.  yyyy-mm-dd.  */
          yyYear = yyvsp[-2].Number;
          yyMonth = -yyvsp[-1].Number;
          yyDay = -yyvsp[0].Number;
      ;
    break;}
case 23:
#line 310 "getdate.y"
{
          /* e.g. 17-JUN-1992.  */
          yyDay = yyvsp[-2].Number;
          yyMonth = yyvsp[-1].Number;
          yyYear = -yyvsp[0].Number;
      ;
    break;}
case 24:
#line 316 "getdate.y"
{
          yyMonth = yyvsp[-1].Number;
          yyDay = yyvsp[0].Number;
      ;
    break;}
case 25:
#line 320 "getdate.y"
{
          yyMonth = yyvsp[-3].Number;
          yyDay = yyvsp[-2].Number;
          yyYear = yyvsp[0].Number;
      ;
    break;}
case 26:
#line 325 "getdate.y"
{
          yyMonth = yyvsp[0].Number;
          yyDay = yyvsp[-1].Number;
      ;
    break;}
case 27:
#line 329 "getdate.y"
{
          yyMonth = yyvsp[-1].Number;
          yyDay = yyvsp[-2].Number;
          yyYear = yyvsp[0].Number;
      ;
    break;}
case 28:
#line 336 "getdate.y"
{
          yyRelSeconds = -yyRelSeconds;
          yyRelMinutes = -yyRelMinutes;
          yyRelHour = -yyRelHour;
          yyRelDay = -yyRelDay;
          yyRelMonth = -yyRelMonth;
          yyRelYear = -yyRelYear;
      ;
    break;}
case 30:
#line 347 "getdate.y"
{
          yyRelYear += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 31:
#line 350 "getdate.y"
{
          yyRelYear += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 32:
#line 353 "getdate.y"
{
          yyRelYear += yyvsp[0].Number;
      ;
    break;}
case 33:
#line 356 "getdate.y"
{
          yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 34:
#line 359 "getdate.y"
{
          yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 35:
#line 362 "getdate.y"
{
          yyRelMonth += yyvsp[0].Number;
      ;
    break;}
case 36:
#line 365 "getdate.y"
{
          yyRelDay += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 37:
#line 368 "getdate.y"
{
          yyRelDay += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 38:
#line 371 "getdate.y"
{
          yyRelDay += yyvsp[0].Number;
      ;
    break;}
case 39:
#line 374 "getdate.y"
{
          yyRelHour += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 40:
#line 377 "getdate.y"
{
          yyRelHour += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 41:
#line 380 "getdate.y"
{
          yyRelHour += yyvsp[0].Number;
      ;
    break;}
case 42:
#line 383 "getdate.y"
{
          yyRelMinutes += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 43:
#line 386 "getdate.y"
{
          yyRelMinutes += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 44:
#line 389 "getdate.y"
{
          yyRelMinutes += yyvsp[0].Number;
      ;
    break;}
case 45:
#line 392 "getdate.y"
{
          yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 46:
#line 395 "getdate.y"
{
          yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number;
      ;
    break;}
case 47:
#line 398 "getdate.y"
{
          yyRelSeconds += yyvsp[0].Number;
      ;
    break;}
case 48:
#line 404 "getdate.y"
{
          if (yyHaveTime && yyHaveDate && !yyHaveRel)
            yyYear = yyvsp[0].Number;
          else
            {
            if (yyvsp[0].Number>10000)
              {
                yyHaveDate++;
                yyDay= (yyvsp[0].Number)%100;
                yyMonth= (yyvsp[0].Number/100)%100;
                yyYear = yyvsp[0].Number/10000;
              }
            else
              {
                yyHaveTime++;
                if (yyvsp[0].Number < 100)
                  {
                  yyHour = yyvsp[0].Number;
                  yyMinutes = 0;
                  }
                else
                  {
                  yyHour = yyvsp[0].Number / 100;
                  yyMinutes = yyvsp[0].Number % 100;
                  }
                yySeconds = 0;
                yyMeridian = MER24;
              }
            }
        ;
    break;}
case 49:
#line 437 "getdate.y"
{
          yyval.Meridian = MER24;
        ;
    break;}
case 50:
#line 441 "getdate.y"
{
          yyval.Meridian = yyvsp[0].Meridian;
        ;
    break;}
}
   /* the action file gets copied in in place of this dollarsign */
#line 543 "/usr/local/share/bison.simple"

  yyvsp -= yylen;
  yyssp -= yylen;
#ifdef YYLSP_NEEDED
  yylsp -= yylen;
#endif

#if YYDEBUG != 0
  if (yydebug)
    {
      short *ssp1 = yyss - 1;
      fprintf (stderr, "state stack now");
      while (ssp1 != yyssp)
      fprintf (stderr, " %d", *++ssp1);
      fprintf (stderr, "\n");
    }
#endif

  *++yyvsp = yyval;

#ifdef YYLSP_NEEDED
  yylsp++;
  if (yylen == 0)
    {
      yylsp->first_line = yylloc.first_line;
      yylsp->first_column = yylloc.first_column;
      yylsp->last_line = (yylsp-1)->last_line;
      yylsp->last_column = (yylsp-1)->last_column;
      yylsp->text = 0;
    }
  else
    {
      yylsp->last_line = (yylsp+yylen-1)->last_line;
      yylsp->last_column = (yylsp+yylen-1)->last_column;
    }
#endif

  /* Now "shift" the result of the reduction.
     Determine what state that goes to,
     based on the state we popped back to
     and the rule number reduced by.  */

  yyn = yyr1[yyn];

  yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
  if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
    yystate = yytable[yystate];
  else
    yystate = yydefgoto[yyn - YYNTBASE];

  goto yynewstate;

yyerrlab:   /* here on detecting error */

  if (! yyerrstatus)
    /* If not already recovering from an error, report this error.  */
    {
      ++yynerrs;

#ifdef YYERROR_VERBOSE
      yyn = yypact[yystate];

      if (yyn > YYFLAG && yyn < YYLAST)
      {
        int size = 0;
        char *msg;
        int x, count;

        count = 0;
        /* Start X at -yyn if nec to avoid negative indexes in yycheck.  */
        for (x = (yyn < 0 ? -yyn : 0);
             x < (sizeof(yytname) / sizeof(char *)); x++)
          if (yycheck[x + yyn] == x)
            size += strlen(yytname[x]) + 15, count++;
        msg = (char *) malloc(size + 15);
        if (msg != 0)
          {
            strcpy(msg, "parse error");

            if (count < 5)
            {
              count = 0;
              for (x = (yyn < 0 ? -yyn : 0);
                   x < (sizeof(yytname) / sizeof(char *)); x++)
                if (yycheck[x + yyn] == x)
                  {
                  strcat(msg, count == 0 ? ", expecting `" : " or `");
                  strcat(msg, yytname[x]);
                  strcat(msg, "'");
                  count++;
                  }
            }
            yyerror(msg);
            free(msg);
          }
        else
          yyerror ("parse error; also virtual memory exceeded");
      }
      else
#endif /* YYERROR_VERBOSE */
      yyerror("parse error");
    }

  goto yyerrlab1;
yyerrlab1:   /* here on error raised explicitly by an action */

  if (yyerrstatus == 3)
    {
      /* if just tried and failed to reuse lookahead token after an error, discard it.  */

      /* return failure if at end of input */
      if (yychar == YYEOF)
      YYABORT;

#if YYDEBUG != 0
      if (yydebug)
      fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]);
#endif

      yychar = YYEMPTY;
    }

  /* Else will try to reuse lookahead token
     after shifting the error token.  */

  yyerrstatus = 3;            /* Each real token shifted decrements this */

  goto yyerrhandle;

yyerrdefault:  /* current state does not do anything special for the error token. */

#if 0
  /* This is wrong; only states that explicitly want error tokens
     should shift them.  */
  yyn = yydefact[yystate];  /* If its default is to accept any token, ok.  Otherwise pop it.*/
  if (yyn) goto yydefault;
#endif

yyerrpop:   /* pop the current state because it cannot handle the error token */

  if (yyssp == yyss) YYABORT;
  yyvsp--;
  yystate = *--yyssp;
#ifdef YYLSP_NEEDED
  yylsp--;
#endif

#if YYDEBUG != 0
  if (yydebug)
    {
      short *ssp1 = yyss - 1;
      fprintf (stderr, "Error: state stack now");
      while (ssp1 != yyssp)
      fprintf (stderr, " %d", *++ssp1);
      fprintf (stderr, "\n");
    }
#endif

yyerrhandle:

  yyn = yypact[yystate];
  if (yyn == YYFLAG)
    goto yyerrdefault;

  yyn += YYTERROR;
  if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
    goto yyerrdefault;

  yyn = yytable[yyn];
  if (yyn < 0)
    {
      if (yyn == YYFLAG)
      goto yyerrpop;
      yyn = -yyn;
      goto yyreduce;
    }
  else if (yyn == 0)
    goto yyerrpop;

  if (yyn == YYFINAL)
    YYACCEPT;

#if YYDEBUG != 0
  if (yydebug)
    fprintf(stderr, "Shifting error token, ");
#endif

  *++yyvsp = yylval;
#ifdef YYLSP_NEEDED
  *++yylsp = yylloc;
#endif

  yystate = yyn;
  goto yynewstate;

 yyacceptlab:
  /* YYACCEPT comes here.  */
  if (yyfree_stacks)
    {
      free (yyss);
      free (yyvs);
#ifdef YYLSP_NEEDED
      free (yyls);
#endif
    }
  return 0;

 yyabortlab:
  /* YYABORT comes here.  */
  if (yyfree_stacks)
    {
      free (yyss);
      free (yyvs);
#ifdef YYLSP_NEEDED
      free (yyls);
#endif
    }
  return 1;
}
#line 446 "getdate.y"


/* Month and day table. */
static TABLE const MonthDayTable[] = {
    { "january",  tMONTH,  1 },
    { "february", tMONTH,  2 },
    { "march",          tMONTH,  3 },
    { "april",          tMONTH,  4 },
    { "may",            tMONTH,  5 },
    { "june",           tMONTH,  6 },
    { "july",           tMONTH,  7 },
    { "august",         tMONTH,  8 },
    { "september",      tMONTH,  9 },
    { "sept",           tMONTH,  9 },
    { "october",  tMONTH, 10 },
    { "november", tMONTH, 11 },
    { "december", tMONTH, 12 },
    { "sunday",         tDAY, 0 },
    { "monday",         tDAY, 1 },
    { "tuesday",  tDAY, 2 },
    { "tues",           tDAY, 2 },
    { "wednesday",      tDAY, 3 },
    { "wednes",         tDAY, 3 },
    { "thursday", tDAY, 4 },
    { "thur",           tDAY, 4 },
    { "thurs",          tDAY, 4 },
    { "friday",         tDAY, 5 },
    { "saturday", tDAY, 6 },
    { NULL }
};

/* Time units table. */
static TABLE const UnitsTable[] = {
    { "year",           tYEAR_UNIT, 1 },
    { "month",          tMONTH_UNIT,      1 },
    { "fortnight",      tDAY_UNIT,  14 },
    { "week",           tDAY_UNIT,  7 },
    { "day",            tDAY_UNIT,  1 },
    { "hour",           tHOUR_UNIT, 1 },
    { "minute",         tMINUTE_UNIT,     1 },
    { "min",            tMINUTE_UNIT,     1 },
    { "second",         tSEC_UNIT,  1 },
    { "sec",            tSEC_UNIT,  1 },
    { NULL }
};

/* Assorted relative-time words. */
static TABLE const OtherTable[] = {
    { "tomorrow", tMINUTE_UNIT,     1 * 24 * 60 },
    { "yesterday",      tMINUTE_UNIT,     -1 * 24 * 60 },
    { "today",          tMINUTE_UNIT,     0 },
    { "now",            tMINUTE_UNIT,     0 },
    { "last",           tUNUMBER,   -1 },
    { "this",           tMINUTE_UNIT,     0 },
    { "next",           tUNUMBER,   2 },
    { "first",          tUNUMBER,   1 },
/*  { "second",         tUNUMBER,   2 }, */
    { "third",          tUNUMBER,   3 },
    { "fourth",         tUNUMBER,   4 },
    { "fifth",          tUNUMBER,   5 },
    { "sixth",          tUNUMBER,   6 },
    { "seventh",  tUNUMBER,   7 },
    { "eighth",         tUNUMBER,   8 },
    { "ninth",          tUNUMBER,   9 },
    { "tenth",          tUNUMBER,   10 },
    { "eleventh", tUNUMBER,   11 },
    { "twelfth",  tUNUMBER,   12 },
    { "ago",            tAGO, 1 },
    { NULL }
};

/* The timezone table. */
static TABLE const TimezoneTable[] = {
    { "gmt",      tZONE,     HOUR ( 0) }, /* Greenwich Mean */
    { "ut", tZONE,     HOUR ( 0) }, /* Universal (Coordinated) */
    { "utc",      tZONE,     HOUR ( 0) },
    { "wet",      tZONE,     HOUR ( 0) }, /* Western European */
    { "bst",      tDAYZONE,  HOUR ( 0) }, /* British Summer */
    { "wat",      tZONE,     HOUR ( 1) }, /* West Africa */
    { "at", tZONE,     HOUR ( 2) }, /* Azores */
#if   0
    /* For completeness.  BST is also British Summer, and GST is
     * also Guam Standard. */
    { "bst",      tZONE,     HOUR ( 3) }, /* Brazil Standard */
    { "gst",      tZONE,     HOUR ( 3) }, /* Greenland Standard */
#endif
#if 0
    { "nft",      tZONE,     HOUR (3.5) },      /* Newfoundland */
    { "nst",      tZONE,     HOUR (3.5) },      /* Newfoundland Standard */
    { "ndt",      tDAYZONE,  HOUR (3.5) },      /* Newfoundland Daylight */
#endif
    { "ast",      tZONE,     HOUR ( 4) }, /* Atlantic Standard */
    { "adt",      tDAYZONE,  HOUR ( 4) }, /* Atlantic Daylight */
    { "est",      tZONE,     HOUR ( 5) }, /* Eastern Standard */
    { "edt",      tDAYZONE,  HOUR ( 5) }, /* Eastern Daylight */
    { "cst",      tZONE,     HOUR ( 6) }, /* Central Standard */
    { "cdt",      tDAYZONE,  HOUR ( 6) }, /* Central Daylight */
    { "mst",      tZONE,     HOUR ( 7) }, /* Mountain Standard */
    { "mdt",      tDAYZONE,  HOUR ( 7) }, /* Mountain Daylight */
    { "pst",      tZONE,     HOUR ( 8) }, /* Pacific Standard */
    { "pdt",      tDAYZONE,  HOUR ( 8) }, /* Pacific Daylight */
    { "yst",      tZONE,     HOUR ( 9) }, /* Yukon Standard */
    { "ydt",      tDAYZONE,  HOUR ( 9) }, /* Yukon Daylight */
    { "hst",      tZONE,     HOUR (10) }, /* Hawaii Standard */
    { "hdt",      tDAYZONE,  HOUR (10) }, /* Hawaii Daylight */
    { "cat",      tZONE,     HOUR (10) }, /* Central Alaska */
    { "ahst",     tZONE,     HOUR (10) }, /* Alaska-Hawaii Standard */
    { "nt", tZONE,     HOUR (11) }, /* Nome */
    { "idlw",     tZONE,     HOUR (12) }, /* International Date Line West */
    { "cet",      tZONE,     -HOUR (1) }, /* Central European */
    { "met",      tZONE,     -HOUR (1) }, /* Middle European */
    { "mewt",     tZONE,     -HOUR (1) }, /* Middle European Winter */
    { "mest",     tDAYZONE,  -HOUR (1) }, /* Middle European Summer */
    { "mesz",     tDAYZONE,  -HOUR (1) }, /* Middle European Summer */
    { "swt",      tZONE,     -HOUR (1) }, /* Swedish Winter */
    { "sst",      tDAYZONE,  -HOUR (1) }, /* Swedish Summer */
    { "fwt",      tZONE,     -HOUR (1) }, /* French Winter */
    { "fst",      tDAYZONE,  -HOUR (1) }, /* French Summer */
    { "eet",      tZONE,     -HOUR (2) }, /* Eastern Europe, USSR Zone 1 */
    { "bt", tZONE,     -HOUR (3) }, /* Baghdad, USSR Zone 2 */
#if 0
    { "it", tZONE,     -HOUR (3.5) },/* Iran */
#endif
    { "zp4",      tZONE,     -HOUR (4) }, /* USSR Zone 3 */
    { "zp5",      tZONE,     -HOUR (5) }, /* USSR Zone 4 */
#if 0
    { "ist",      tZONE,     -HOUR (5.5) },/* Indian Standard */
#endif
    { "zp6",      tZONE,     -HOUR (6) }, /* USSR Zone 5 */
#if   0
    /* For completeness.  NST is also Newfoundland Standard, and SST is
     * also Swedish Summer. */
    { "nst",      tZONE,     -HOUR (6.5) },/* North Sumatra */
    { "sst",      tZONE,     -HOUR (7) }, /* South Sumatra, USSR Zone 6 */
#endif      /* 0 */
    { "wast",     tZONE,     -HOUR (7) }, /* West Australian Standard */
    { "wadt",     tDAYZONE,  -HOUR (7) }, /* West Australian Daylight */
#if 0
    { "jt", tZONE,     -HOUR (7.5) },/* Java (3pm in Cronusland!) */
#endif
    { "cct",      tZONE,     -HOUR (8) }, /* China Coast, USSR Zone 7 */
    { "jst",      tZONE,     -HOUR (9) }, /* Japan Standard, USSR Zone 8 */
#if 0
    { "cast",     tZONE,     -HOUR (9.5) },/* Central Australian Standard */
    { "cadt",     tDAYZONE,  -HOUR (9.5) },/* Central Australian Daylight */
#endif
    { "east",     tZONE,     -HOUR (10) },      /* Eastern Australian Standard */
    { "eadt",     tDAYZONE,  -HOUR (10) },      /* Eastern Australian Daylight */
    { "gst",      tZONE,     -HOUR (10) },      /* Guam Standard, USSR Zone 9 */
    { "nzt",      tZONE,     -HOUR (12) },      /* New Zealand */
    { "nzst",     tZONE,     -HOUR (12) },      /* New Zealand Standard */
    { "nzdt",     tDAYZONE,  -HOUR (12) },      /* New Zealand Daylight */
    { "idle",     tZONE,     -HOUR (12) },      /* International Date Line East */
    {  NULL  }
};

/* Military timezone table. */
static TABLE const MilitaryTable[] = {
    { "a",  tZONE,      HOUR (  1) },
    { "b",  tZONE,      HOUR (  2) },
    { "c",  tZONE,      HOUR (  3) },
    { "d",  tZONE,      HOUR (  4) },
    { "e",  tZONE,      HOUR (  5) },
    { "f",  tZONE,      HOUR (  6) },
    { "g",  tZONE,      HOUR (  7) },
    { "h",  tZONE,      HOUR (  8) },
    { "i",  tZONE,      HOUR (  9) },
    { "k",  tZONE,      HOUR ( 10) },
    { "l",  tZONE,      HOUR ( 11) },
    { "m",  tZONE,      HOUR ( 12) },
    { "n",  tZONE,      HOUR (- 1) },
    { "o",  tZONE,      HOUR (- 2) },
    { "p",  tZONE,      HOUR (- 3) },
    { "q",  tZONE,      HOUR (- 4) },
    { "r",  tZONE,      HOUR (- 5) },
    { "s",  tZONE,      HOUR (- 6) },
    { "t",  tZONE,      HOUR (- 7) },
    { "u",  tZONE,      HOUR (- 8) },
    { "v",  tZONE,      HOUR (- 9) },
    { "w",  tZONE,      HOUR (-10) },
    { "x",  tZONE,      HOUR (-11) },
    { "y",  tZONE,      HOUR (-12) },
    { "z",  tZONE,      HOUR (  0) },
    { NULL }
};



static char *get_date_error_buf;
const char *get_date_error()
{
   return get_date_error_buf;
}

/* ARGSUSED */
static int
yyerror (s)
     char *s;
{
  xfree(get_date_error_buf);
  get_date_error_buf=strdup(s);
  return 0;
}

static int
ToHour (Hours, Meridian)
     int Hours;
     MERIDIAN Meridian;
{
  switch (Meridian)
    {
    case MER24:
      if (Hours < 0 || Hours > 23)
      return -1;
      return Hours;
    case MERam:
      if (Hours < 1 || Hours > 12)
      return -1;
      if (Hours == 12)
      Hours = 0;
      return Hours;
    case MERpm:
      if (Hours < 1 || Hours > 12)
      return -1;
      if (Hours == 12)
      Hours = 0;
      return Hours + 12;
    default:
      abort ();
    }
  /* NOTREACHED */
}

static int
ToYear (Year)
     int Year;
{
  if (Year < 0)
    Year = -Year;

  /* XPG4 suggests that years 00-68 map to 2000-2068, and
     years 69-99 map to 1969-1999.  */
  if (Year < 69)
    Year += 2000;
  else if (Year < 100)
    Year += 1900;

  return Year;
}

static int
LookupWord (buff)
     char *buff;
{
  register char *p;
  register char *q;
  register const TABLE *tp;
  int i;
  int abbrev;

  /* Make it lowercase. */
  for (p = buff; *p; p++)
    if (ISUPPER (*p))
      *p = tolower (*p);

  if (strcmp (buff, "am") == 0 || strcmp (buff, "a.m.") == 0)
    {
      yylval.Meridian = MERam;
      return tMERIDIAN;
    }
  if (strcmp (buff, "pm") == 0 || strcmp (buff, "p.m.") == 0)
    {
      yylval.Meridian = MERpm;
      return tMERIDIAN;
    }

  /* See if we have an abbreviation for a month. */
  if (strlen (buff) == 3)
    abbrev = 1;
  else if (strlen (buff) == 4 && buff[3] == '.')
    {
      abbrev = 1;
      buff[3] = '\0';
    }
  else
    abbrev = 0;

  for (tp = MonthDayTable; tp->name; tp++)
    {
      if (abbrev)
      {
        if (strncmp (buff, tp->name, 3) == 0)
          {
            yylval.Number = tp->value;
            return tp->type;
          }
      }
      else if (strcmp (buff, tp->name) == 0)
      {
        yylval.Number = tp->value;
        return tp->type;
      }
    }

  for (tp = TimezoneTable; tp->name; tp++)
    if (strcmp (buff, tp->name) == 0)
      {
      yylval.Number = tp->value;
      return tp->type;
      }

  if (strcmp (buff, "dst") == 0)
    return tDST;

  for (tp = UnitsTable; tp->name; tp++)
    if (strcmp (buff, tp->name) == 0)
      {
      yylval.Number = tp->value;
      return tp->type;
      }

  /* Strip off any plural and try the units table again. */
  i = strlen (buff) - 1;
  if (buff[i] == 's')
    {
      buff[i] = '\0';
      for (tp = UnitsTable; tp->name; tp++)
      if (strcmp (buff, tp->name) == 0)
        {
          yylval.Number = tp->value;
          return tp->type;
        }
      buff[i] = 's';          /* Put back for "this" in OtherTable. */
    }

  for (tp = OtherTable; tp->name; tp++)
    if (strcmp (buff, tp->name) == 0)
      {
      yylval.Number = tp->value;
      return tp->type;
      }

  /* Military timezones. */
  if (buff[1] == '\0' && ISALPHA (*buff))
    {
      for (tp = MilitaryTable; tp->name; tp++)
      if (strcmp (buff, tp->name) == 0)
        {
          yylval.Number = tp->value;
          return tp->type;
        }
    }

  /* Drop out any periods and try the timezone table again. */
  for (i = 0, p = q = buff; *q; q++)
    if (*q != '.')
      *p++ = *q;
    else
      i++;
  *p = '\0';
  if (i)
    for (tp = TimezoneTable; tp->name; tp++)
      if (strcmp (buff, tp->name) == 0)
      {
        yylval.Number = tp->value;
        return tp->type;
      }

  return tID;
}

static int
yylex ()
{
  register char c;
  register char *p;
  char buff[20];
  int Count;
  int sign;

  for (;;)
    {
      while (ISSPACE (*yyInput))
      yyInput++;

      if (ISDIGIT (c = *yyInput) || c == '-' || c == '+')
      {
        if (c == '-' || c == '+')
          {
            sign = c == '-' ? -1 : 1;
            if (!ISDIGIT (*++yyInput))
            /* skip the '-' sign */
            continue;
          }
        else
          sign = 0;
        for (yylval.Number = 0; ISDIGIT (c = *yyInput++);)
          yylval.Number = 10 * yylval.Number + c - '0';
        yyInput--;
        if (sign < 0)
          yylval.Number = -yylval.Number;
        return sign ? tSNUMBER : tUNUMBER;
      }
      if (ISALPHA (c))
      {
        for (p = buff; (c = *yyInput++, ISALPHA (c)) || c == '.';)
          if (p < &buff[sizeof buff - 1])
            *p++ = c;
        *p = '\0';
        yyInput--;
        return LookupWord (buff);
      }
      if (c != '(')
      return *yyInput++;
      Count = 0;
      do
      {
        c = *yyInput++;
        if (c == '\0')
          return c;
        if (c == '(')
          Count++;
        else if (c == ')')
          Count--;
      }
      while (Count > 0);
    }
}

#define TM_YEAR_ORIGIN 1900

/* Yield A - B, measured in seconds.  */
static long
difftm (a, b)
     struct tm *a, *b;
{
  int ay = a->tm_year + (TM_YEAR_ORIGIN - 1);
  int by = b->tm_year + (TM_YEAR_ORIGIN - 1);
  long days = (
  /* difference in day of year */
            a->tm_yday - b->tm_yday
  /* + intervening leap days */
            + ((ay >> 2) - (by >> 2))
            - (ay / 100 - by / 100)
            + ((ay / 100 >> 2) - (by / 100 >> 2))
  /* + difference in years * 365 */
            + (long) (ay - by) * 365
  );
  return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
            + (a->tm_min - b->tm_min))
        + (a->tm_sec - b->tm_sec));
}

time_t
get_date (p, now)
     const char *p;
     const time_t *now;
{
  struct tm tm, tm0, *tmp;
  time_t Start;

  yyInput = p;
  Start = now ? *now : time ((time_t *) NULL);
  tmp = localtime (&Start);
  yyYear = tmp->tm_year + TM_YEAR_ORIGIN;
  yyMonth = tmp->tm_mon + 1;
  yyDay = tmp->tm_mday;
  yyHour = tmp->tm_hour;
  yyMinutes = tmp->tm_min;
  yySeconds = tmp->tm_sec;
  yyMeridian = MER24;
  yyRelSeconds = 0;
  yyRelMinutes = 0;
  yyRelHour = 0;
  yyRelDay = 0;
  yyRelMonth = 0;
  yyRelYear = 0;
  yyHaveDate = 0;
  yyHaveDay = 0;
  yyHaveRel = 0;
  yyHaveTime = 0;
  yyHaveZone = 0;

  if (yyparse ()
      || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1)
    return -1;

  tm.tm_year = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear;
  tm.tm_mon = yyMonth - 1 + yyRelMonth;
  tm.tm_mday = yyDay + yyRelDay;
  if (yyHaveTime || (yyHaveRel && !yyHaveDate && !yyHaveDay))
    {
      tm.tm_hour = ToHour (yyHour, yyMeridian);
      if (tm.tm_hour < 0)
      return -1;
      tm.tm_min = yyMinutes;
      tm.tm_sec = yySeconds;
    }
  else
    {
      tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
    }
  tm.tm_hour += yyRelHour;
  tm.tm_min += yyRelMinutes;
  tm.tm_sec += yyRelSeconds;
  tm.tm_isdst = -1;
  tm0 = tm;

  Start = mktime (&tm);

  if (Start == (time_t) -1)
    {

      /* Guard against falsely reporting errors near the time_t boundaries
         when parsing times in other time zones.  For example, if the min
         time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead
         of UTC, then the min localtime value is 1970-01-01 08:00:00; if
         we apply mktime to 1970-01-01 00:00:00 we will get an error, so
         we apply mktime to 1970-01-02 08:00:00 instead and adjust the time
         zone by 24 hours to compensate.  This algorithm assumes that
         there is no DST transition within a day of the time_t boundaries.  */
      if (yyHaveZone)
      {
        tm = tm0;
        if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN)
          {
            tm.tm_mday++;
            yyTimezone -= 24 * 60;
          }
        else
          {
            tm.tm_mday--;
            yyTimezone += 24 * 60;
          }
        Start = mktime (&tm);
      }

      if (Start == (time_t) -1)
      return Start;
    }

  if (yyHaveDay && !yyHaveDate)
    {
      tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7
                 + 7 * (yyDayOrdinal - (0 < yyDayOrdinal)));
      Start = mktime (&tm);
      if (Start == (time_t) -1)
      return Start;
    }

  if (yyHaveZone)
    {
      long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start));
      if ((Start + delta < Start) != (delta < 0))
      return -1;        /* time_t overflow */
      Start += delta;
    }

  return Start;
}

#if   defined (TEST)

/* ARGSUSED */
int
main (ac, av)
     int ac;
     char *av[];
{
  char buff[MAX_BUFF_LEN + 1];
  time_t d;

  (void) printf _(("Enter date, or blank line to exit.\n\t> "));
  (void) fflush (stdout);

  buff[MAX_BUFF_LEN] = 0;
  while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
    {
      d = get_date (buff, (time_t *) NULL);
      if (d == -1)
      (void) printf _(("Bad format - couldn't convert.\n"));
      else
      (void) printf ("%s", ctime (&d));
      (void) printf ("\t> ");
      (void) fflush (stdout);
    }
  exit (0);
  /* NOTREACHED */
}
#endif /* defined (TEST) */

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