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getdate.c

/* A Bison parser, made by GNU Bison 1.875a.  */
/* Some minor changes by Tony Hoyle */

/* Skeleton parser for Yacc-like parsing with Bison,
   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003 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.  */

/* Written by Richard Stallman by simplifying the original so called
   ``semantic'' parser.  */

/* All symbols defined below should begin with yy or YY, to avoid
   infringing on user name space.  This should be done even for local
   variables, as they might otherwise be expanded by user macros.
   There are some unavoidable exceptions within include files to
   define necessary library symbols; they are noted "INFRINGES ON
   USER NAME SPACE" below.  */

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

/* Skeleton name.  */
#define YYSKELETON_NAME "yacc.c"

/* Pure parsers.  */
#define YYPURE 0

/* Using locations.  */
#define YYLSP_NEEDED 0



/* Tokens.  */
#ifndef YYTOKENTYPE
# define YYTOKENTYPE
   /* Put the tokens into the symbol table, so that GDB and other debuggers
      know about them.  */
   enum yytokentype {
     tAGO = 258,
     tDAY = 259,
     tDAYZONE = 260,
     tID = 261,
     tMERIDIAN = 262,
     tMINUTE_UNIT = 263,
     tMONTH = 264,
     tMONTH_UNIT = 265,
     tSEC_UNIT = 266,
     tSNUMBER = 267,
     tUNUMBER = 268,
     tZONE = 269,
     tDST = 270
   };
#endif
#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
/*
**  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 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 */

#include <config.h>
#include "api_system.h"

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

/* 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.  */

#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <time.h>
#ifdef HAVE_SYS_TIMEB_H
#include <sys/timeb.h>
#endif
#include <string.h>
#include <stdlib.h>

#include "getdate.h"

/* 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


/* NOTES on rebuilding getdate.c (particularly for inclusion in CVS
   releases):

   We don't want to mess with all the portability hassles of alloca.
   In particular, most (all?) versions of bison will use alloca in
   their parser.  If bison works on your system (e.g. it should work
   with gcc), then go ahead and use it, but the more general solution
   is to use byacc instead of bison, which should generate a portable
   parser.  I played with adding "#define alloca dont_use_alloca", to
   give an error if the parser generator uses alloca (and thus detect
   unportable getdate.c's), but that seems to cause as many problems
   as it solves.  */

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

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

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


/*
**  An entry in the lexical lookup table.
*/
typedef struct _TABLE {
    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;



/* Enabling traces.  */
#ifndef YYDEBUG
# define YYDEBUG 0
#endif

/* Enabling verbose error messages.  */
#ifdef YYERROR_VERBOSE
# undef YYERROR_VERBOSE
# define YYERROR_VERBOSE 1
#else
# define YYERROR_VERBOSE 0
#endif

#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
typedef union YYSTYPE {
    time_t        Number;
    enum _MERIDIAN      Meridian;
} YYSTYPE;
/* Line 191 of yacc.c.  */
# define yystype YYSTYPE /* obsolescent; will be withdrawn */
# define YYSTYPE_IS_DECLARED 1
# define YYSTYPE_IS_TRIVIAL 1
#endif



/* Copy the second part of user declarations.  */


/* Line 214 of yacc.c.  */

#if ! defined (yyoverflow) || YYERROR_VERBOSE

/* The parser invokes alloca or malloc; define the necessary symbols.  */

# if YYSTACK_USE_ALLOCA
#  define YYSTACK_ALLOC alloca
# else
#  ifndef YYSTACK_USE_ALLOCA
#   if defined (alloca) || defined (_ALLOCA_H)
#    define YYSTACK_ALLOC alloca
#   else
#    ifdef __GNUC__
#     define YYSTACK_ALLOC __builtin_alloca
#    endif
#   endif
#  endif
# endif

# ifdef YYSTACK_ALLOC
   /* Pacify GCC's `empty if-body' warning. */
#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
# else
#  if defined (__STDC__) || defined (__cplusplus)
#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
#   define YYSIZE_T size_t
#  endif
#  define YYSTACK_ALLOC malloc
#  define YYSTACK_FREE free
# endif
#endif /* ! defined (yyoverflow) || YYERROR_VERBOSE */


#if (! defined (yyoverflow) \
     && (! defined (__cplusplus) \
       || (YYSTYPE_IS_TRIVIAL)))

/* A type that is properly aligned for any stack member.  */
union yyalloc
{
  short yyss;
  YYSTYPE yyvs;
  };

/* The size of the maximum gap between one aligned stack and the next.  */
# define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)

/* The size of an array large to enough to hold all stacks, each with
   N elements.  */
# define YYSTACK_BYTES(N) \
     ((N) * (sizeof (short) + sizeof (YYSTYPE))                   \
      + YYSTACK_GAP_MAXIMUM)

/* Copy COUNT objects from FROM to TO.  The source and destination do
   not overlap.  */
# ifndef YYCOPY
#  if 1 < __GNUC__
#   define YYCOPY(To, From, Count) \
      __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
#  else
#   define YYCOPY(To, From, Count)        \
      do                            \
      {                             \
        register YYSIZE_T yyi;            \
        for (yyi = 0; yyi < (Count); yyi++)     \
          (To)[yyi] = (From)[yyi];        \
      }                             \
      while (0)
#  endif
# endif

/* Relocate STACK from its old location to the new one.  The
   local variables YYSIZE and YYSTACKSIZE give the old and new number of
   elements in the stack, and YYPTR gives the new location of the
   stack.  Advance YYPTR to a properly aligned location for the next
   stack.  */
# define YYSTACK_RELOCATE(Stack)                            \
    do                                                      \
      {                                                     \
      YYSIZE_T yynewbytes;                                  \
      YYCOPY (&yyptr->Stack, Stack, yysize);                      \
      Stack = &yyptr->Stack;                                \
      yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
      yyptr += yynewbytes / sizeof (*yyptr);                      \
      }                                                     \
    while (0)

#endif

#if defined (__STDC__) || defined (__cplusplus)
   typedef signed char yysigned_char;
#else
   typedef short yysigned_char;
#endif

/* YYFINAL -- State number of the termination state. */
#define YYFINAL  2
/* YYLAST -- Last index in YYTABLE.  */
#define YYLAST   43

/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS  19
/* YYNNTS -- Number of nonterminals. */
#define YYNNTS  11
/* YYNRULES -- Number of rules. */
#define YYNRULES  42
/* YYNRULES -- Number of states. */
#define YYNSTATES  52

/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
#define YYUNDEFTOK  2
#define YYMAXUTOK   270

#define YYTRANSLATE(YYX)                                    \
  ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)

/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
static const unsigned 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
/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
   YYRHS.  */
static const unsigned char yyprhs[] =
{
       0,     0,     3,     4,     7,     9,    11,    13,    15,    17,
      19,    22,    27,    32,    39,    46,    48,    50,    53,    55,
      58,    61,    65,    71,    75,    79,    82,    87,    90,    94,
      97,    99,   102,   105,   107,   110,   113,   115,   118,   121,
     123,   125,   126
};

/* YYRHS -- A `-1'-separated list of the rules' RHS. */
static const yysigned_char yyrhs[] =
{
      20,     0,    -1,    -1,    20,    21,    -1,    22,    -1,    23,
      -1,    25,    -1,    24,    -1,    26,    -1,    28,    -1,    13,
       7,    -1,    13,    16,    13,    29,    -1,    13,    16,    13,
      12,    -1,    13,    16,    13,    16,    13,    29,    -1,    13,
      16,    13,    16,    13,    12,    -1,    14,    -1,     5,    -1,
      14,    15,    -1,     4,    -1,     4,    17,    -1,    13,     4,
      -1,    13,    18,    13,    -1,    13,    18,    13,    18,    13,
      -1,    13,    12,    12,    -1,    13,     9,    12,    -1,     9,
      13,    -1,     9,    13,    17,    13,    -1,    13,     9,    -1,
      13,     9,    13,    -1,    27,     3,    -1,    27,    -1,    13,
       8,    -1,    12,     8,    -1,     8,    -1,    12,    11,    -1,
      13,    11,    -1,    11,    -1,    12,    10,    -1,    13,    10,
      -1,    10,    -1,    13,    -1,    -1,     7,    -1
};

/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
static const unsigned short yyrline[] =
{
       0,   159,   159,   160,   163,   166,   169,   172,   175,   178,
     181,   187,   193,   200,   206,   216,   220,   225,   231,   235,
     239,   245,   249,   260,   266,   272,   276,   281,   285,   292,
     296,   299,   302,   305,   308,   311,   314,   317,   320,   323,
     328,   355,   358
};
#endif

#if YYDEBUG || YYERROR_VERBOSE
/* YYTNME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
   First, the terminals, then, starting at YYNTOKENS, nonterminals. */
static const char *const yytname[] =
{
  "$end", "error", "$undefined", "tAGO", "tDAY", "tDAYZONE", "tID", 
  "tMERIDIAN", "tMINUTE_UNIT", "tMONTH", "tMONTH_UNIT", "tSEC_UNIT", 
  "tSNUMBER", "tUNUMBER", "tZONE", "tDST", "':'", "','", "'/'", "$accept", 
  "spec", "item", "time", "zone", "day", "date", "rel", "relunit", 
  "number", "o_merid", 0
};
#endif

# ifdef YYPRINT
/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
   token YYLEX-NUM.  */
static const unsigned short yytoknum[] =
{
       0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
     265,   266,   267,   268,   269,   270,    58,    44,    47
};
# endif

/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
static const unsigned char yyr1[] =
{
       0,    19,    20,    20,    21,    21,    21,    21,    21,    21,
      22,    22,    22,    22,    22,    23,    23,    23,    24,    24,
      24,    25,    25,    25,    25,    25,    25,    25,    25,    26,
      26,    27,    27,    27,    27,    27,    27,    27,    27,    27,
      28,    29,    29
};

/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
static const unsigned char yyr2[] =
{
       0,     2,     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
};

/* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
   STATE-NUM when YYTABLE doesn't specify something else to do.  Zero
   means the default is an error.  */
static const unsigned char yydefact[] =
{
       2,     0,     1,    18,    16,    33,     0,    39,    36,     0,
      40,    15,     3,     4,     5,     7,     6,     8,    30,     9,
      19,    25,    32,    37,    34,    20,    10,    31,    27,    38,
      35,     0,     0,     0,    17,    29,     0,    24,    28,    23,
      41,    21,    26,    42,    12,     0,    11,     0,    41,    22,
      14,    13
};

/* YYDEFGOTO[NTERM-NUM]. */
static const yysigned_char yydefgoto[] =
{
      -1,     1,    12,    13,    14,    15,    16,    17,    18,    19,
      46
};

/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
   STATE-NUM.  */
#define YYPACT_NINF -11
static const yysigned_char yypact[] =
{
     -11,     0,   -11,    -1,   -11,   -11,     4,   -11,   -11,    25,
      11,    -8,   -11,   -11,   -11,   -11,   -11,   -11,    21,   -11,
     -11,     9,   -11,   -11,   -11,   -11,   -11,   -11,   -10,   -11,
     -11,    16,    19,    24,   -11,   -11,    26,   -11,   -11,   -11,
      18,    13,   -11,   -11,   -11,    27,   -11,    28,    -6,   -11,
     -11,   -11
};

/* YYPGOTO[NTERM-NUM].  */
static const yysigned_char yypgoto[] =
{
     -11,   -11,   -11,   -11,   -11,   -11,   -11,   -11,   -11,   -11,
      -5
};

/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
   positive, shift that token.  If negative, reduce the rule which
   number is the opposite.  If zero, do what YYDEFACT says.
   If YYTABLE_NINF, syntax error.  */
#define YYTABLE_NINF -1
static const unsigned char yytable[] =
{
       2,    43,    37,    38,     3,     4,    50,    34,     5,     6,
       7,     8,     9,    10,    11,    25,    20,    21,    26,    27,
      28,    29,    30,    31,    35,    43,    36,    32,    39,    33,
      44,    47,    40,    22,    45,    23,    24,    41,     0,    42,
      48,    49,     0,    51
};

static const yysigned_char 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,    -1,    13,
      13,    13,    -1,    48
};

/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
   symbol of state STATE-NUM.  */
static const unsigned char yystos[] =
{
       0,    20,     0,     4,     5,     8,     9,    10,    11,    12,
      13,    14,    21,    22,    23,    24,    25,    26,    27,    28,
      17,    13,     8,    10,    11,     4,     7,     8,     9,    10,
      11,    12,    16,    18,    15,     3,    17,    12,    13,    12,
      13,    13,    13,     7,    12,    16,    29,    18,    13,    13,
      12,    29
};

#if ! defined (YYSIZE_T) && defined (__SIZE_TYPE__)
# define YYSIZE_T __SIZE_TYPE__
#endif
#if ! defined (YYSIZE_T) && defined (size_t)
# define YYSIZE_T size_t
#endif
#if ! defined (YYSIZE_T)
# if defined (__STDC__) || defined (__cplusplus)
#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
#  define YYSIZE_T size_t
# endif
#endif
#if ! defined (YYSIZE_T)
# define YYSIZE_T unsigned int
#endif

#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);                               \
      yytoken = YYTRANSLATE (yychar);                       \
      YYPOPSTACK;                               \
      goto yybackup;                                  \
    }                                           \
  else                                                \
    {                                                 \
      yyerror ("syntax error: cannot back up");\
      YYERROR;                                        \
    }                                           \
while (0)

#define YYTERROR  1
#define YYERRCODE 256

/* YYLLOC_DEFAULT -- Compute the default location (before the actions
   are run).  */

#ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N)         \
  Current.first_line   = Rhs[1].first_line;      \
  Current.first_column = Rhs[1].first_column;    \
  Current.last_line    = Rhs[N].last_line;       \
  Current.last_column  = Rhs[N].last_column;
#endif

/* YYLEX -- calling `yylex' with the right arguments.  */

#ifdef YYLEX_PARAM
# define YYLEX yylex (YYLEX_PARAM)
#else
# define YYLEX yylex ()
#endif

/* Enable debugging if requested.  */
#if YYDEBUG

# ifndef YYFPRINTF
#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
#  define YYFPRINTF fprintf
# endif

# define YYDPRINTF(Args)                  \
do {                                \
  if (yydebug)                            \
    YYFPRINTF Args;                       \
} while (0)

# define YYDSYMPRINT(Args)                \
do {                                \
  if (yydebug)                            \
    yysymprint Args;                      \
} while (0)

# define YYDSYMPRINTF(Title, Token, Value, Location)        \
do {                                            \
  if (yydebug)                                        \
    {                                           \
      YYFPRINTF (stderr, "%s ", Title);                     \
      yysymprint (stderr,                             \
                  Token, Value);    \
      YYFPRINTF (stderr, "\n");                             \
    }                                           \
} while (0)

/*------------------------------------------------------------------.
| yy_stack_print -- Print the state stack from its BOTTOM up to its |
| TOP (cinluded).                                                   |
`------------------------------------------------------------------*/

#if defined (__STDC__) || defined (__cplusplus)
static void
yy_stack_print (short *bottom, short *top)
#else
static void
yy_stack_print (bottom, top)
    short *bottom;
    short *top;
#endif
{
  YYFPRINTF (stderr, "Stack now");
  for (/* Nothing. */; bottom <= top; ++bottom)
    YYFPRINTF (stderr, " %d", *bottom);
  YYFPRINTF (stderr, "\n");
}

# define YY_STACK_PRINT(Bottom, Top)                        \
do {                                            \
  if (yydebug)                                        \
    yy_stack_print ((Bottom), (Top));                       \
} while (0)


/*------------------------------------------------.
| Report that the YYRULE is going to be reduced.  |
`------------------------------------------------*/

#if defined (__STDC__) || defined (__cplusplus)
static void
yy_reduce_print (int yyrule)
#else
static void
yy_reduce_print (yyrule)
    int yyrule;
#endif
{
  int yyi;
  unsigned int yylineno = yyrline[yyrule];
  YYFPRINTF (stderr, "Reducing stack by rule %d (line %u), ",
             yyrule - 1, yylineno);
  /* Print the symbols being reduced, and their result.  */
  for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++)
    YYFPRINTF (stderr, "%s ", yytname [yyrhs[yyi]]);
  YYFPRINTF (stderr, "-> %s\n", yytname [yyr1[yyrule]]);
}

# define YY_REDUCE_PRINT(Rule)            \
do {                          \
  if (yydebug)                      \
    yy_reduce_print (Rule);         \
} while (0)

/* Nonzero means print parse trace.  It is left uninitialized so that
   multiple parsers can coexist.  */
int yydebug;
#else /* !YYDEBUG */
# define YYDPRINTF(Args)
# define YYDSYMPRINT(Args)
# define YYDSYMPRINTF(Title, Token, Value, Location)
# define YY_STACK_PRINT(Bottom, Top)
# define YY_REDUCE_PRINT(Rule)
#endif /* !YYDEBUG */


/* YYINITDEPTH -- initial size of the parser's stacks.  */
#ifndef     YYINITDEPTH
# define YYINITDEPTH 200
#endif

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

   Do not make this value too large; the results are undefined if
   SIZE_MAX < YYSTACK_BYTES (YYMAXDEPTH)
   evaluated with infinite-precision integer arithmetic.  */

#if YYMAXDEPTH == 0
# undef YYMAXDEPTH
#endif

#ifndef YYMAXDEPTH
# define YYMAXDEPTH 10000
#endif



#if YYERROR_VERBOSE

# ifndef yystrlen
#  if defined (__GLIBC__) && defined (_STRING_H)
#   define yystrlen strlen
#  else
/* Return the length of YYSTR.  */
static YYSIZE_T
#   if defined (__STDC__) || defined (__cplusplus)
yystrlen (const char *yystr)
#   else
yystrlen (yystr)
     const char *yystr;
#   endif
{
  register const char *yys = yystr;

  while (*yys++ != '\0')
    continue;

  return yys - yystr - 1;
}
#  endif
# endif

# ifndef yystpcpy
#  if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE)
#   define yystpcpy stpcpy
#  else
/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
   YYDEST.  */
static char *
#   if defined (__STDC__) || defined (__cplusplus)
yystpcpy (char *yydest, const char *yysrc)
#   else
yystpcpy (yydest, yysrc)
     char *yydest;
     const char *yysrc;
#   endif
{
  register char *yyd = yydest;
  register const char *yys = yysrc;

  while ((*yyd++ = *yys++) != '\0')
    continue;

  return yyd - 1;
}
#  endif
# endif

#endif /* !YYERROR_VERBOSE */



#if YYDEBUG
/*--------------------------------.
| Print this symbol on YYOUTPUT.  |
`--------------------------------*/

#if defined (__STDC__) || defined (__cplusplus)
static void
yysymprint (FILE *yyoutput, int yytype, YYSTYPE *yyvaluep)
#else
static void
yysymprint (yyoutput, yytype, yyvaluep)
    FILE *yyoutput;
    int yytype;
    YYSTYPE *yyvaluep;
#endif
{
  /* Pacify ``unused variable'' warnings.  */
  (void) yyvaluep;

  if (yytype < YYNTOKENS)
    {
      YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
# ifdef YYPRINT
      YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
# endif
    }
  else
    YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);

  switch (yytype)
    {
      default:
        break;
    }
  YYFPRINTF (yyoutput, ")");
}

#endif /* ! YYDEBUG */
/*-----------------------------------------------.
| Release the memory associated to this symbol.  |
`-----------------------------------------------*/

#if defined (__STDC__) || defined (__cplusplus)
static void
yydestruct (int yytype, YYSTYPE *yyvaluep)
#else
static void
yydestruct (yytype, yyvaluep)
    int yytype;
    YYSTYPE *yyvaluep;
#endif
{
  /* Pacify ``unused variable'' warnings.  */
  (void) yyvaluep;

  switch (yytype)
    {

      default:
        break;
    }
}


/* Prevent warnings from -Wmissing-prototypes.  */

#ifdef YYPARSE_PARAM
# if defined (__STDC__) || defined (__cplusplus)
int yyparse (void *YYPARSE_PARAM);
# else
int yyparse ();
# endif
#else /* ! YYPARSE_PARAM */
#if defined (__STDC__) || defined (__cplusplus)
int yyparse (void);
#else
int yyparse ();
#endif
#endif /* ! YYPARSE_PARAM */



/* The lookahead symbol.  */
int yychar;

/* The semantic value of the lookahead symbol.  */
YYSTYPE yylval;

/* Number of syntax errors so far.  */
int yynerrs;



/*----------.
| yyparse.  |
`----------*/

#ifdef YYPARSE_PARAM
# if defined (__STDC__) || defined (__cplusplus)
int yyparse (void *YYPARSE_PARAM)
# else
int yyparse (YYPARSE_PARAM)
  void *YYPARSE_PARAM;
# endif
#else /* ! YYPARSE_PARAM */
#if defined (__STDC__) || defined (__cplusplus)
int
yyparse (void)
#else
int
yyparse ()

#endif
#endif
{
  
  register int yystate;
  register int yyn;
  int yyresult;
  /* Number of tokens to shift before error messages enabled.  */
  int yyerrstatus;
  /* Lookahead token as an internal (translated) token number.  */
  int yytoken = 0;

  /* Three stacks and their tools:
     `yyss': related to states,
     `yyvs': related to semantic values,
     `yyls': related to locations.

     Refer to the stacks thru separate pointers, to allow yyoverflow
     to reallocate them elsewhere.  */

  /* The state stack.  */
  short     yyssa[YYINITDEPTH];
  short *yyss = yyssa;
  register short *yyssp;

  /* The semantic value stack.  */
  YYSTYPE yyvsa[YYINITDEPTH];
  YYSTYPE *yyvs = yyvsa;
  register YYSTYPE *yyvsp;



#define YYPOPSTACK   (yyvsp--, yyssp--)

  YYSIZE_T yystacksize = YYINITDEPTH;

  /* The variables used to return semantic value and location from the
     action routines.  */
  YYSTYPE yyval;


  /* When reducing, the number of symbols on the RHS of the reduced
     rule.  */
  int yylen;

  YYDPRINTF ((stderr, "Starting parse\n"));

  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;
  yyvsp = yyvs;

  goto yysetstate;

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

 yysetstate:
  *yyssp = yystate;

  if (yyss + yystacksize - 1 <= yyssp)
    {
      /* Get the current used size of the three stacks, in elements.  */
      YYSIZE_T yysize = (YYSIZE_T)(yyssp - yyss + 1);

#ifdef yyoverflow
      {
      /* 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;


      /* Each stack pointer address is followed by the size of the
         data in use in that stack, in bytes.  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, yysize * sizeof (*yyssp),
                &yyvs1, yysize * sizeof (*yyvsp),

                &yystacksize);

      yyss = yyss1;
      yyvs = yyvs1;
      }
#else /* no yyoverflow */
# ifndef YYSTACK_RELOCATE
      goto yyoverflowlab;
# else
      /* Extend the stack our own way.  */
      if (YYMAXDEPTH <= yystacksize)
      goto yyoverflowlab;
      yystacksize *= 2;
      if (YYMAXDEPTH < yystacksize)
      yystacksize = YYMAXDEPTH;

      {
      short *yyss1 = yyss;
      union yyalloc *yyptr =
        (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
      if (! yyptr)
        goto yyoverflowlab;
      YYSTACK_RELOCATE (yyss);
      YYSTACK_RELOCATE (yyvs);

#  undef YYSTACK_RELOCATE
      if (yyss1 != yyssa)
        YYSTACK_FREE (yyss1);
      }
# endif
#endif /* no yyoverflow */

      yyssp = yyss + yysize - 1;
      yyvsp = yyvs + yysize - 1;


      YYDPRINTF ((stderr, "Stack size increased to %lu\n",
              (unsigned long int) yystacksize));

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

  YYDPRINTF ((stderr, "Entering state %d\n", yystate));

  goto yybackup;

/*-----------.
| 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 == YYPACT_NINF)
    goto yydefault;

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

  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
  if (yychar == YYEMPTY)
    {
      YYDPRINTF ((stderr, "Reading a token: "));
      yychar = YYLEX;
    }

  if (yychar <= YYEOF)
    {
      yychar = yytoken = YYEOF;
      YYDPRINTF ((stderr, "Now at end of input.\n"));
    }
  else
    {
      yytoken = YYTRANSLATE (yychar);
      YYDSYMPRINTF ("Next token is", yytoken, &yylval, &yylloc);
    }

  /* If the proper action on seeing token YYTOKEN is to reduce or to
     detect an error, take that action.  */
  yyn += yytoken;
  if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
    goto yydefault;
  yyn = yytable[yyn];
  if (yyn <= 0)
    {
      if (yyn == 0 || yyn == YYTABLE_NINF)
      goto yyerrlab;
      yyn = -yyn;
      goto yyreduce;
    }

  if (yyn == YYFINAL)
    YYACCEPT;

  /* Shift the lookahead token.  */
  YYDPRINTF ((stderr, "Shifting token %s, ", yytname[yytoken]));

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

  *++yyvsp = yylval;


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

  yystate = yyn;
  goto yynewstate;


/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state.  |
`-----------------------------------------------------------*/
yydefault:
  yyn = yydefact[yystate];
  if (yyn == 0)
    goto yyerrlab;
  goto yyreduce;


/*-----------------------------.
| yyreduce -- Do a reduction.  |
`-----------------------------*/
yyreduce:
  /* yyn is the number of a rule to reduce with.  */
  yylen = yyr2[yyn];

  /* If YYLEN is nonzero, implement the default value of the action:
     `$$ = $1'.

     Otherwise, the following line sets YYVAL to garbage.
     This behavior is undocumented and Bison
     users should not rely upon it.  Assigning to YYVAL
     unconditionally makes the parser a bit smaller, and it avoids a
     GCC warning that YYVAL may be used uninitialized.  */
  yyval = yyvsp[1-yylen];


  YY_REDUCE_PRINT (yyn);
  switch (yyn)
    {
        case 4:
    {
          yyHaveTime++;
      }
    break;

  case 5:
    {
          yyHaveZone++;
      }
    break;

  case 6:
    {
          yyHaveDate++;
      }
    break;

  case 7:
    {
          yyHaveDay++;
      }
    break;

  case 8:
    {
          yyHaveRel++;
      }
    break;

  case 10:
    {
          yyHour = yyvsp[-1].Number;
          yyMinutes = 0;
          yySeconds = 0;
          yyMeridian = yyvsp[0].Meridian;
      }
    break;

  case 11:
    {
          yyHour = yyvsp[-3].Number;
          yyMinutes = yyvsp[-1].Number;
          yySeconds = 0;
          yyMeridian = yyvsp[0].Meridian;
      }
    break;

  case 12:
    {
          yyHour = yyvsp[-3].Number;
          yyMinutes = yyvsp[-1].Number;
          yyMeridian = MER24;
          yyDSTmode = DSToff;
          yyTimezone = - (yyvsp[0].Number % 100 + (yyvsp[0].Number / 100) * 60);
      }
    break;

  case 13:
    {
          yyHour = yyvsp[-5].Number;
          yyMinutes = yyvsp[-3].Number;
          yySeconds = yyvsp[-1].Number;
          yyMeridian = yyvsp[0].Meridian;
      }
    break;

  case 14:
    {
          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 15:
    {
          yyTimezone = yyvsp[0].Number;
          yyDSTmode = DSToff;
      }
    break;

  case 16:
    {
          yyTimezone = yyvsp[0].Number;
          yyDSTmode = DSTon;
      }
    break;

  case 17:
    {
          yyTimezone = yyvsp[-1].Number;
          yyDSTmode = DSTon;
      }
    break;

  case 18:
    {
          yyDayOrdinal = 1;
          yyDayNumber = yyvsp[0].Number;
      }
    break;

  case 19:
    {
          yyDayOrdinal = 1;
          yyDayNumber = yyvsp[-1].Number;
      }
    break;

  case 20:
    {
          yyDayOrdinal = yyvsp[-1].Number;
          yyDayNumber = yyvsp[0].Number;
      }
    break;

  case 21:
    {
          yyMonth = yyvsp[-2].Number;
          yyDay = yyvsp[0].Number;
      }
    break;

  case 22:
    {
          if (yyvsp[-4].Number >= 100) {
            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 23:
    {
          /* ISO 8601 format.  yyyy-mm-dd.  */
          yyYear = yyvsp[-2].Number;
          yyMonth = -yyvsp[-1].Number;
          yyDay = -yyvsp[0].Number;
      }
    break;

  case 24:
    {
          /* e.g. 17-JUN-1992.  */
          yyDay = yyvsp[-2].Number;
          yyMonth = yyvsp[-1].Number;
          yyYear = -yyvsp[0].Number;
      }
    break;

  case 25:
    {
          yyMonth = yyvsp[-1].Number;
          yyDay = yyvsp[0].Number;
      }
    break;

  case 26:
    {
          yyMonth = yyvsp[-3].Number;
          yyDay = yyvsp[-2].Number;
          yyYear = yyvsp[0].Number;
      }
    break;

  case 27:
    {
          yyMonth = yyvsp[0].Number;
          yyDay = yyvsp[-1].Number;
      }
    break;

  case 28:
    {
          yyMonth = yyvsp[-1].Number;
          yyDay = yyvsp[-2].Number;
          yyYear = yyvsp[0].Number;
      }
    break;

  case 29:
    {
          yyRelSeconds = -yyRelSeconds;
          yyRelMonth = -yyRelMonth;
      }
    break;

  case 31:
    {
          yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number * 60L;
      }
    break;

  case 32:
    {
          yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number * 60L;
      }
    break;

  case 33:
    {
          yyRelSeconds += yyvsp[0].Number * 60L;
      }
    break;

  case 34:
    {
          yyRelSeconds += yyvsp[-1].Number;
      }
    break;

  case 35:
    {
          yyRelSeconds += yyvsp[-1].Number;
      }
    break;

  case 36:
    {
          yyRelSeconds++;
      }
    break;

  case 37:
    {
          yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
      }
    break;

  case 38:
    {
          yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
      }
    break;

  case 39:
    {
          yyRelMonth += yyvsp[0].Number;
      }
    break;

  case 40:
    {
          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 41:
    {
          yyval.Meridian = MER24;
      }
    break;

  case 42:
    {
          yyval.Meridian = yyvsp[0].Meridian;
      }
    break;


    }

/* Line 999 of yacc.c.  */

  yyvsp -= yylen;
  yyssp -= yylen;


  YY_STACK_PRINT (yyss, yyssp);

  *++yyvsp = yyval;


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

  goto yynewstate;


/*------------------------------------.
| yyerrlab -- here on detecting error |
`------------------------------------*/
yyerrlab:
  /* If not already recovering from an error, report this error.  */
  if (!yyerrstatus)
    {
      ++yynerrs;
#if YYERROR_VERBOSE
      yyn = yypact[yystate];

      if (YYPACT_NINF < yyn && yyn < YYLAST)
      {
        YYSIZE_T yysize = 0;
        int yytype = YYTRANSLATE (yychar);
        char *yymsg;
        int yyx, yycount;

        yycount = 0;
        /* Start YYX at -YYN if negative to avoid negative indexes in
           YYCHECK.  */
        for (yyx = yyn < 0 ? -yyn : 0;
             yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
          if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
            yysize += yystrlen (yytname[yyx]) + 15, yycount++;
        yysize += yystrlen ("syntax error, unexpected ") + 1;
        yysize += yystrlen (yytname[yytype]);
        yymsg = (char *) YYSTACK_ALLOC (yysize);
        if (yymsg != 0)
          {
            char *yyp = yystpcpy (yymsg, "syntax error, unexpected ");
            yyp = yystpcpy (yyp, yytname[yytype]);

            if (yycount < 5)
            {
              yycount = 0;
              for (yyx = yyn < 0 ? -yyn : 0;
                   yyx < (int) (sizeof (yytname) / sizeof (char *));
                   yyx++)
                if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
                  {
                  const char *yyq = ! yycount ? ", expecting " : " or ";
                  yyp = yystpcpy (yyp, yyq);
                  yyp = yystpcpy (yyp, yytname[yyx]);
                  yycount++;
                  }
            }
            yyerror (yymsg);
            YYSTACK_FREE (yymsg);
          }
        else
          yyerror ("syntax error; also virtual memory exhausted");
      }
      else
#endif /* YYERROR_VERBOSE */
      yyerror ("syntax error");
    }



  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)
        {
        /* Pop the error token.  */
          YYPOPSTACK;
        /* Pop the rest of the stack.  */
        while (yyss < yyssp)
          {
            YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);
            yydestruct (yystos[*yyssp], yyvsp);
            YYPOPSTACK;
          }
        YYABORT;
        }

      YYDSYMPRINTF ("Error: discarding", yytoken, &yylval, &yylloc);
      yydestruct (yytoken, &yylval);
      yychar = YYEMPTY;

    }

  /* Else will try to reuse lookahead token after shifting the error
     token.  */
  goto yyerrlab1;


/*----------------------------------------------------.
| yyerrlab1 -- error raised explicitly by an action.  |
`----------------------------------------------------*/
yyerrlab1:
  yyerrstatus = 3;      /* Each real token shifted decrements this.  */

  for (;;)
    {
      yyn = yypact[yystate];
      if (yyn != YYPACT_NINF)
      {
        yyn += YYTERROR;
        if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
          {
            yyn = yytable[yyn];
            if (0 < yyn)
            break;
          }
      }

      /* Pop the current state because it cannot handle the error token.  */
      if (yyssp == yyss)
      YYABORT;

      YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);
      yydestruct (yystos[yystate], yyvsp);
      yyvsp--;
      yystate = *--yyssp;

      YY_STACK_PRINT (yyss, yyssp);
    }

  if (yyn == YYFINAL)
    YYACCEPT;

  YYDPRINTF ((stderr, "Shifting error token, "));

  *++yyvsp = yylval;


  yystate = yyn;
  goto yynewstate;


/*-------------------------------------.
| yyacceptlab -- YYACCEPT comes here.  |
`-------------------------------------*/
yyacceptlab:
  yyresult = 0;
  goto yyreturn;

/*-----------------------------------.
| yyabortlab -- YYABORT comes here.  |
`-----------------------------------*/
yyabortlab:
  yyresult = 1;
  goto yyreturn;

#ifndef yyoverflow
/*----------------------------------------------.
| yyoverflowlab -- parser overflow comes here.  |
`----------------------------------------------*/
yyoverflowlab:
  yyerror ("parser stack overflow");
  yyresult = 2;
  /* Fall through.  */
#endif

yyreturn:
#ifndef yyoverflow
  if (yyss != yyssa)
    YYSTACK_FREE (yyss);
#endif
  return yyresult;
}




/* 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 */
    { "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 Stanard, 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 */
}


/* Year is either
   * A negative number, which means to use its absolute value (why?)
   * A number from 0 to 99, which means a year from 1900 to 1999, or
   * The actual year (>=100).  */
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 < 69)
      Year += 2000;
    else if (Year < 100)
      Year += 1900;
    DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0)
                ? 29 : 28;
    /* Checking for 2038 bogusly assumes that time_t is 32 bits.  But
       I'm too lazy to try to check for time_t overflow in another way.  */
    if (Year < EPOCH /*|| Year > 2038*/
     || 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;
    Julian += yyTimezone * 60L;
    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 + 1900) + 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 = (int)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; isalpha(c = *yyInput++) || 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.  */
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);
  int 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;
    time_t nowtime;

    yyInput = p;
    if (now == NULL) {
      struct tm *gmt_ptr;

        now = &ftz;
      (void)time (&nowtime);

      gmt_ptr = gmtime (&nowtime);
      if (gmt_ptr != NULL)
      {
          /* Make a copy, in case localtime modifies *tm (I think
             that comment now applies to *gmt_ptr, but I am too
             lazy to dig into how gmtime and locatime allocate the
             structures they return pointers to).  */
          gmt = *gmt_ptr;
      }

      if (! (tm = localtime (&nowtime)))
          return -1;

      if (gmt_ptr != NULL)
          ftz.timezone = (short)(difftm (&gmt, tm) / 60);
      else
          /* We are on a system like VMS, where the system clock is
             in local time and the system has no concept of timezones.
             Hopefully we can fake this out (for the case in which the
             user specifies no timezone) by just saying the timezone
             is zero.  */
          ftz.timezone = 0;

      if(tm->tm_isdst)
          ftz.timezone += 60;
    }
    else
    {
      nowtime = now->time;
    }

    tm = localtime(&nowtime);
    yyYear = tm->tm_year + 1900;
    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 = nowtime;
      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[128];
    time_t  d;

    (void)printf("Enter date, or blank line to exit.\n\t> ");
    (void)fflush(stdout);
    while (gets(buff) && 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) */



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