
/*  A Bison parser, made from getdate.y with Bison version GNU Bison version 1.22
  */

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

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

#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;
**  send any email to Rich.
**
**  This grammar has 10 shift/reduce conflicts.
**
**  This code is in the public domain and has no copyright.
*/
/* SUPPRESS 287 on yaccpar_sccsid *//* Unused static variable */
/* SUPPRESS 288 on yyerrlab *//* Label unused */

#ifdef HAVE_CONFIG_H
#include <config.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>

#if defined (STDC_HEADERS) || !defined (isascii)
#define ISASCII(c) 1
#else
#define ISASCII(c) isascii(c)
#endif

#define ISSPACE(c) (ISASCII (c) && isspace (c))
#define ISALPHA(c) (ISASCII (c) && isalpha (c))
#define ISUPPER(c) (ISASCII (c) && isupper (c))
#define ISDIGIT(c) (ISASCII (c) && isdigit (c))

/* The code at the top of get_date which figures out the offset of the
   current time zone checks various CPP symbols to see if special
   tricks are need, but defaults to using the gettimeofday system call.
   Include <sys/time.h> if that will be used.  */

#if	defined (vms)

#include <types.h>
#include <time.h>

#else

#include <sys/types.h>

#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif

#ifdef timezone
#undef timezone /* needed for sgi */
#endif

#if defined (HAVE_SYS_TIMEB_H)
#include <sys/timeb.h>
#else
/*
** We use the obsolete `struct timeb' as part of our interface!
** Since the system doesn't have it, we define it here;
** our callers must do likewise.
*/
struct timeb {
    time_t		time;		/* Seconds since the epoch	*/
    unsigned short	millitm;	/* Field not used		*/
    short		timezone;	/* Minutes west of GMT		*/
    short		dstflag;	/* Field not used		*/
};
#endif /* defined (HAVE_SYS_TIMEB_H) */

#endif	/* defined (vms) */

#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 ();

#define yyparse getdate_yyparse
#define yylex getdate_yylex
#define yyerror getdate_yyerror

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

#define EPOCH		1970
#define HOUR(x)		((time_t)(x) * 60)
#define SECSPERDAY	(24L * 60L * 60L)

#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;
    time_t	value;
} TABLE;


/*
**  Daylight-savings mode:  on, off, or not yet known.
*/
typedef enum _DSTMODE {
    DSTon, DSToff, DSTmaybe
} DSTMODE;

/*
**  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 char	*yyInput;
static DSTMODE	yyDSTmode;
static time_t	yyDayOrdinal;
static time_t	yyDayNumber;
static int	yyHaveDate;
static int	yyHaveDay;
static int	yyHaveRel;
static int	yyHaveTime;
static int	yyHaveZone;
static time_t	yyTimezone;
static time_t	yyDay;
static time_t	yyHour;
static time_t	yyMinutes;
static time_t	yyMonth;
static time_t	yySeconds;
static time_t	yyYear;
static MERIDIAN	yyMeridian;
static time_t	yyRelMonth;
static time_t	yyRelSeconds;


#line 171 "getdate.y"
typedef union {
    time_t		Number;
    enum _MERIDIAN	Meridian;
} 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 __cplusplus
#ifndef __STDC__
#define const
#endif
#endif



#define	YYFINAL		52
#define	YYFLAG		-32768
#define	YYNTBASE	19

#define YYTRANSLATE(x) ((unsigned)(x) <= 270 ? yytranslate[x] : 29)

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,    17,     2,     2,    18,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,    16,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     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,     7,     8,     9,    10,    11,    12,    13,    14,    15
};

#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,   122,
   123
};

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

#endif

#if YYDEBUG != 0
static const short yyrline[] = { 0,
   185,   186,   189,   192,   195,   198,   201,   204,   207,   213,
   219,   226,   232,   242,   246,   250,   257,   261,   265,   271,
   275,   280,   286,   292,   296,   301,   305,   312,   316,   319,
   322,   325,   328,   331,   334,   337,   340,   343,   348,   375,
   378
};

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

static const short yyr1[] = {     0,
    19,    19,    20,    20,    20,    20,    20,    20,    21,    21,
    21,    21,    21,    22,    22,    22,    23,    23,    23,    24,
    24,    24,    24,    24,    24,    24,    24,    25,    25,    26,
    26,    26,    26,    26,    26,    26,    26,    26,    27,    28,
    28
};

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,     1,     0,
     1
};

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

static const short yydefgoto[] = {     1,
    11,    12,    13,    14,    15,    16,    17,    18,    45
};

static const short yypact[] = {-32768,
     0,    -1,-32768,-32768,     4,-32768,-32768,    25,    11,    -8,
-32768,-32768,-32768,-32768,-32768,-32768,    21,-32768,-32768,     9,
-32768,-32768,-32768,-32768,-32768,-32768,   -10,-32768,-32768,    16,
    19,    24,-32768,-32768,    26,-32768,-32768,-32768,    18,    13,
-32768,-32768,-32768,    27,-32768,    28,    -6,-32768,-32768,-32768,
    38,-32768
};

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


#define	YYLAST		42


static const short yytable[] = {    51,
    42,    36,    37,     2,     3,    49,    33,     4,     5,     6,
     7,     8,     9,    10,    24,    19,    20,    25,    26,    27,
    28,    29,    30,    34,    42,    35,    31,    38,    32,    43,
    46,    39,    21,    44,    22,    23,    40,    52,    41,    47,
    48,    50
};

static const short yycheck[] = {     0,
     7,    12,    13,     4,     5,    12,    15,     8,     9,    10,
    11,    12,    13,    14,     4,    17,    13,     7,     8,     9,
    10,    11,    12,     3,     7,    17,    16,    12,    18,    12,
    18,    13,     8,    16,    10,    11,    13,     0,    13,    13,
    13,    47
};
/* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
#line 3 "/usr/lib/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__) || defined (__sparc) || defined (__sgi)
#include <alloca.h>
#else /* not sparc */
#if defined (MSDOS) && !defined (__TURBOC__)
#include <malloc.h>
#else /* not MSDOS, or __TURBOC__ */
#if defined(_AIX)
#include <malloc.h>
 #pragma alloca
#else /* not MSDOS, __TURBOC__, or _AIX */
#ifdef __hpux
#ifdef __cplusplus
extern "C" {
void *alloca (unsigned int);
};
#else /* not __cplusplus */
void *alloca ();
#endif /* not __cplusplus */
#endif /* __hpux */
#endif /* not _AIX */
#endif /* not MSDOS, or __TURBOC__ */
#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

/* Prevent warning if -Wstrict-prototypes.  */
#ifdef __GNUC__
int yyparse (void);
#endif

#if __GNUC__ > 1		/* GNU C and GNU C++ define this.  */
#define __yy_bcopy(FROM,TO,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_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
#endif

#line 184 "/usr/lib/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 = 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;

#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");
	  return 2;
	}
      yystacksize *= 2;
      if (yystacksize > YYMAXDEPTH)
	yystacksize = YYMAXDEPTH;
      yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
      __yy_bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
      yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
      __yy_bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
#ifdef YYLSP_NEEDED
      yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
      __yy_bcopy ((char *)yyls1, (char *)yyls, size * 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 189 "getdate.y"
{
	    yyHaveTime++;
	;
    break;}
case 4:
#line 192 "getdate.y"
{
	    yyHaveZone++;
	;
    break;}
case 5:
#line 195 "getdate.y"
{
	    yyHaveDate++;
	;
    break;}
case 6:
#line 198 "getdate.y"
{
	    yyHaveDay++;
	;
    break;}
case 7:
#line 201 "getdate.y"
{
	    yyHaveRel++;
	;
    break;}
case 9:
#line 207 "getdate.y"
{
	    yyHour = yyvsp[-1].Number;
	    yyMinutes = 0;
	    yySeconds = 0;
	    yyMeridian = yyvsp[0].Meridian;
	;
    break;}
case 10:
#line 213 "getdate.y"
{
	    yyHour = yyvsp[-3].Number;
	    yyMinutes = yyvsp[-1].Number;
	    yySeconds = 0;
	    yyMeridian = yyvsp[0].Meridian;
	;
    break;}
case 11:
#line 219 "getdate.y"
{
	    yyHour = yyvsp[-3].Number;
	    yyMinutes = yyvsp[-1].Number;
	    yyMeridian = MER24;
	    yyDSTmode = DSToff;
	    yyTimezone = - (yyvsp[0].Number % 100 + (yyvsp[0].Number / 100) * 60);
	;
    break;}
case 12:
#line 226 "getdate.y"
{
	    yyHour = yyvsp[-5].Number;
	    yyMinutes = yyvsp[-3].Number;
	    yySeconds = yyvsp[-1].Number;
	    yyMeridian = yyvsp[0].Meridian;
	;
    break;}
case 13:
#line 232 "getdate.y"
{
	    yyHour = yyvsp[-5].Number;
	    yyMinutes = yyvsp[-3].Number;
	    yySeconds = yyvsp[-1].Number;
	    yyMeridian = MER24;
	    yyDSTmode = DSToff;
	    yyTimezone = - (yyvsp[0].Number % 100 + (yyvsp[0].Number / 100) * 60);
	;
    break;}
case 14:
#line 242 "getdate.y"
{
	    yyTimezone = yyvsp[0].Number;
	    yyDSTmode = DSToff;
	;
    break;}
case 15:
#line 246 "getdate.y"
{
	    yyTimezone = yyvsp[0].Number;
	    yyDSTmode = DSTon;
	;
    break;}
case 16:
#line 251 "getdate.y"
{
	    yyTimezone = yyvsp[-1].Number;
	    yyDSTmode = DSTon;
	;
    break;}
case 17:
#line 257 "getdate.y"
{
	    yyDayOrdinal = 1;
	    yyDayNumber = yyvsp[0].Number;
	;
    break;}
case 18:
#line 261 "getdate.y"
{
	    yyDayOrdinal = 1;
	    yyDayNumber = yyvsp[-1].Number;
	;
    break;}
case 19:
#line 265 "getdate.y"
{
	    yyDayOrdinal = yyvsp[-1].Number;
	    yyDayNumber = yyvsp[0].Number;
	;
    break;}
case 20:
#line 271 "getdate.y"
{
	    yyMonth = yyvsp[-2].Number;
	    yyDay = yyvsp[0].Number;
	;
    break;}
case 21:
#line 275 "getdate.y"
{
	    yyMonth = yyvsp[-4].Number;
	    yyDay = yyvsp[-2].Number;
	    yyYear = yyvsp[0].Number;
	;
    break;}
case 22:
#line 280 "getdate.y"
{
	    /* ISO 8601 format.  yyyy-mm-dd.  */
	    yyYear = yyvsp[-2].Number;
	    yyMonth = -yyvsp[-1].Number;
	    yyDay = -yyvsp[0].Number;
	;
    break;}
case 23:
#line 286 "getdate.y"
{
	    /* e.g. 17-JUN-1992.  */
	    yyDay = yyvsp[-2].Number;
	    yyMonth = yyvsp[-1].Number;
	    yyYear = -yyvsp[0].Number;
	;
    break;}
case 24:
#line 292 "getdate.y"
{
	    yyMonth = yyvsp[-1].Number;
	    yyDay = yyvsp[0].Number;
	;
    break;}
case 25:
#line 296 "getdate.y"
{
	    yyMonth = yyvsp[-3].Number;
	    yyDay = yyvsp[-2].Number;
	    yyYear = yyvsp[0].Number;
	;
    break;}
case 26:
#line 301 "getdate.y"
{
	    yyMonth = yyvsp[0].Number;
	    yyDay = yyvsp[-1].Number;
	;
    break;}
case 27:
#line 305 "getdate.y"
{
	    yyMonth = yyvsp[-1].Number;
	    yyDay = yyvsp[-2].Number;
	    yyYear = yyvsp[0].Number;
	;
    break;}
case 28:
#line 312 "getdate.y"
{
	    yyRelSeconds = -yyRelSeconds;
	    yyRelMonth = -yyRelMonth;
	;
    break;}
case 30:
#line 319 "getdate.y"
{
	    yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number * 60L;
	;
    break;}
case 31:
#line 322 "getdate.y"
{
	    yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number * 60L;
	;
    break;}
case 32:
#line 325 "getdate.y"
{
	    yyRelSeconds += yyvsp[0].Number * 60L;
	;
    break;}
case 33:
#line 328 "getdate.y"
{
	    yyRelSeconds += yyvsp[-1].Number;
	;
    break;}
case 34:
#line 331 "getdate.y"
{
	    yyRelSeconds += yyvsp[-1].Number;
	;
    break;}
case 35:
#line 334 "getdate.y"
{
	    yyRelSeconds++;
	;
    break;}
case 36:
#line 337 "getdate.y"
{
	    yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
	;
    break;}
case 37:
#line 340 "getdate.y"
{
	    yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
	;
    break;}
case 38:
#line 343 "getdate.y"
{
	    yyRelMonth += yyvsp[0].Number;
	;
    break;}
case 39:
#line 348 "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 40:
#line 375 "getdate.y"
{
	    yyval.Meridian = MER24;
	;
    break;}
case 41:
#line 378 "getdate.y"
{
	    yyval.Meridian = yyvsp[0].Meridian;
	;
    break;}
}
   /* the action file gets copied in in place of this dollarsign */
#line 465 "/usr/lib/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;
}
#line 383 "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",		tMONTH_UNIT,	12 },
    { "month",		tMONTH_UNIT,	1 },
    { "fortnight",	tMINUTE_UNIT,	14 * 24 * 60 },
    { "week",		tMINUTE_UNIT,	7 * 24 * 60 },
    { "day",		tMINUTE_UNIT,	1 * 24 * 60 },
    { "hour",		tMINUTE_UNIT,	60 },
    { "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. */
/* Some of these are commented out because a time_t can't store a float. */
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 }
};




/* ARGSUSED */
static int
yyerror (s)
    char	*s;
{
  return 0;
}


static time_t
ToSeconds (Hours, Minutes, Seconds, Meridian)
    time_t	Hours;
    time_t	Minutes;
    time_t	Seconds;
    MERIDIAN	Meridian;
{
  if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59)
    return -1;
  switch (Meridian) {
  case MER24:
    if (Hours < 0 || Hours > 23)
      return -1;
    return (Hours * 60L + Minutes) * 60L + Seconds;
  case MERam:
    if (Hours < 1 || Hours > 12)
      return -1;
    if (Hours == 12)
      Hours = 0;
    return (Hours * 60L + Minutes) * 60L + Seconds;
  case MERpm:
    if (Hours < 1 || Hours > 12)
      return -1;
    if (Hours == 12)
      Hours = 0;
    return ((Hours + 12) * 60L + Minutes) * 60L + Seconds;
  default:
    abort ();
  }
  /* NOTREACHED */
}


static time_t
Convert (Month, Day, Year, Hours, Minutes, Seconds, Meridian, DSTmode)
    time_t	Month;
    time_t	Day;
    time_t	Year;
    time_t	Hours;
    time_t	Minutes;
    time_t	Seconds;
    MERIDIAN	Meridian;
    DSTMODE	DSTmode;
{
  static int DaysInMonth[12] = {
    31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
  };
  time_t	tod;
  time_t	Julian;
  int		i;

  if (Year < 0)
    Year = -Year;
  if (Year < 100)
    Year += 1900;
  DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0)
    ? 29 : 28;
  if (Year < EPOCH || Year > 1999
      || Month < 1 || Month > 12
      /* Lint fluff:  "conversion from long may lose accuracy" */
      || Day < 1 || Day > DaysInMonth[(int)--Month])
    return -1;

  for (Julian = Day - 1, i = 0; i < Month; i++)
    Julian += DaysInMonth[i];
  for (i = EPOCH; i < Year; i++)
    Julian += 365 + (i % 4 == 0);
  Julian *= SECSPERDAY;
  /* Some tz.tz_minuteswest are given in seconds!  Considering a timezone
     correction is at least 30 minutes, this system bug is easy to avoid.  */
  if (yyTimezone > -1800 && yyTimezone < 1800)
    Julian += yyTimezone * 60L;
  else
    Julian += yyTimezone;
  if ((tod = ToSeconds (Hours, Minutes, Seconds, Meridian)) < 0)
    return -1;
  Julian += tod;
  if (DSTmode == DSTon
      || (DSTmode == DSTmaybe && localtime (&Julian)->tm_isdst))
    Julian -= 60 * 60;
  return Julian;
}


static time_t
DSTcorrect (Start, Future)
    time_t	Start;
    time_t	Future;
{
  time_t	StartDay;
  time_t	FutureDay;

  StartDay = (localtime (&Start)->tm_hour + 1) % 24;
  FutureDay = (localtime (&Future)->tm_hour + 1) % 24;
  return (Future - Start) + (StartDay - FutureDay) * 60L * 60L;
}


static time_t
RelativeDate (Start, DayOrdinal, DayNumber)
    time_t	Start;
    time_t	DayOrdinal;
    time_t	DayNumber;
{
  struct tm	*tm;
  time_t	now;

  now = Start;
  tm = localtime (&now);
  now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7);
  now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1);
  return DSTcorrect (Start, now);
}


static time_t
RelativeMonth (Start, RelMonth)
    time_t	Start;
    time_t	RelMonth;
{
  struct tm	*tm;
  time_t	Month;
  time_t	Year;

  if (RelMonth == 0)
    return 0;
  tm = localtime (&Start);
  Month = 12 * tm->tm_year + tm->tm_mon + RelMonth;
  Year = Month / 12;
  Month = Month % 12 + 1;
  return DSTcorrect (Start,
		     Convert (Month, (time_t)tm->tm_mday, Year,
			      (time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec,
			      MER24, DSTmaybe));
}


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;
	++yyInput;
	if (!ISDIGIT (*yyInput))
	  /* skip the '-' sign */
	  continue;
      }
      else
	sign = 0;
      for (yylval.Number = 0; c = *yyInput++, ISDIGIT (c); )
	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)
    char		*p;
    struct timeb	*now;
{
  struct tm		*tm, gmt;
  struct timeb	ftz;
  time_t		Start;
  time_t		tod;

  yyInput = p;
  if (now == NULL) {
    now = &ftz;
    (void)time (&ftz.time);

    if (! (tm = gmtime (&ftz.time)))
      return -1;
    gmt = *tm;			/* Make a copy, in case localtime modifies *tm.  */

    if (! (tm = localtime (&ftz.time)))
      return -1;
	
    ftz.timezone = difftm (&gmt, tm) / 60;
    if (tm->tm_isdst)
      ftz.timezone += 60;
  }

  tm = localtime (&now->time);
  yyYear = tm->tm_year;
  yyMonth = tm->tm_mon + 1;
  yyDay = tm->tm_mday;
  yyTimezone = now->timezone;
  yyDSTmode = DSTmaybe;
  yyHour = 0;
  yyMinutes = 0;
  yySeconds = 0;
  yyMeridian = MER24;
  yyRelSeconds = 0;
  yyRelMonth = 0;
  yyHaveDate = 0;
  yyHaveDay = 0;
  yyHaveRel = 0;
  yyHaveTime = 0;
  yyHaveZone = 0;

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

  if (yyHaveDate || yyHaveTime || yyHaveDay) {
    Start = Convert (yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
		     yyMeridian, yyDSTmode);
    if (Start < 0)
      return -1;
  }
  else {
    Start = now->time;
    if (!yyHaveRel)
      Start -= ((tm->tm_hour * 60L + tm->tm_min) * 60L) + tm->tm_sec;
  }

  Start += yyRelSeconds;
  Start += RelativeMonth (Start, yyRelMonth);

  if (yyHaveDay && !yyHaveDate) {
    tod = RelativeDate (Start, yyDayOrdinal, yyDayNumber);
    Start += tod;
  }

  /* Have to do *something* with a legitimate -1 so it's distinguishable
   * from the error return value.  (Alternately could set errno on error.) */
  return Start == -1 ? 0 : 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, (struct timeb *)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) */
