getdate.c   [plain text]

/* A Bison parser, made by GNU Bison 1.875.  */

/* Skeleton parser for Yacc-like parsing with Bison,
   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002 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 1

/* 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,
     tDST = 259,
     tDAY = 260,
     tDAY_UNIT = 261,
     tDAYZONE = 262,
     tHOUR_UNIT = 263,
     tLOCAL_ZONE = 264,
     tMERIDIAN = 265,
     tMINUTE_UNIT = 266,
     tMONTH = 267,
     tMONTH_UNIT = 268,
     tORDINAL = 269,
     tSEC_UNIT = 270,
     tYEAR_UNIT = 271,
     tZONE = 272,
     tSNUMBER = 273,
     tUNUMBER = 274,
     tSDECIMAL_NUMBER = 275,
     tUDECIMAL_NUMBER = 276
   };
#endif
#define tAGO 258
#define tDST 259
#define tDAY 260
#define tDAY_UNIT 261
#define tDAYZONE 262
#define tHOUR_UNIT 263
#define tLOCAL_ZONE 264
#define tMERIDIAN 265
#define tMINUTE_UNIT 266
#define tMONTH 267
#define tMONTH_UNIT 268
#define tORDINAL 269
#define tSEC_UNIT 270
#define tYEAR_UNIT 271
#define tZONE 272
#define tSNUMBER 273
#define tUNUMBER 274
#define tSDECIMAL_NUMBER 275
#define tUDECIMAL_NUMBER 276




/* Copy the first part of user declarations.  */
#line 1 "getdate.y"

/* Parse a string into an internal time stamp.
   Copyright (C) 1999, 2000, 2002, 2003, 2004 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.  */

/* 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.

   Modified by Paul Eggert <eggert@twinsun.com> in August 1999 to do
   the right thing about local DST.  Also modified by Paul Eggert
   <eggert@cs.ucla.edu> in February 2004 to support
   nanosecond-resolution time stamps, and in October 2004 to support
   TZ strings in dates.  */

/* FIXME: Check for arithmetic overflow in all cases, not just
   some of them.  */

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

#include "getdate.h"

#include <alloca.h>

/* 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 <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "setenv.h"
#include "xalloc.h"

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

#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
#define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))

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

#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
# define __attribute__(x)
#endif

#ifndef ATTRIBUTE_UNUSED
# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif

/* Shift A right by B bits portably, by dividing A by 2**B and
   truncating towards minus infinity.  A and B should be free of side
   effects, and B should be in the range 0 <= B <= INT_BITS - 2, where
   INT_BITS is the number of useful bits in an int.  GNU code can
   assume that INT_BITS is at least 32.

   ISO C99 says that A >> B is implementation-defined if A < 0.  Some
   implementations (e.g., UNICOS 9.0 on a Cray Y-MP EL) don't shift
   right in the usual way when A < 0, so SHR falls back on division if
   ordinary A >> B doesn't seem to be the usual signed shift.  */
#define SHR(a, b)	\
  (-1 >> 1 == -1	\
   ? (a) >> (b)		\
   : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0))

#define EPOCH_YEAR 1970
#define TM_YEAR_BASE 1900

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

/* An integer value, and the number of digits in its textual
   representation.  */
typedef struct
{
  bool negative;
  long int value;
  size_t digits;
} textint;

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

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

enum { BILLION = 1000000000, LOG10_BILLION = 9 };

/* Information passed to and from the parser.  */
typedef struct
{
  /* The input string remaining to be parsed. */
  const char *input;

  /* N, if this is the Nth Tuesday.  */
  long int day_ordinal;

  /* Day of week; Sunday is 0.  */
  int day_number;

  /* tm_isdst flag for the local zone.  */
  int local_isdst;

  /* Time zone, in minutes east of UTC.  */
  long int time_zone;

  /* Style used for time.  */
  int meridian;

  /* Gregorian year, month, day, hour, minutes, seconds, and nanoseconds.  */
  textint year;
  long int month;
  long int day;
  long int hour;
  long int minutes;
  struct timespec seconds; /* includes nanoseconds */

  /* Relative year, month, day, hour, minutes, seconds, and nanoseconds.  */
  long int rel_year;
  long int rel_month;
  long int rel_day;
  long int rel_hour;
  long int rel_minutes;
  long int rel_seconds;
  long int rel_ns;

  /* Counts of nonterminals of various flavors parsed so far.  */
  bool timespec_seen;
  size_t dates_seen;
  size_t days_seen;
  size_t local_zones_seen;
  size_t rels_seen;
  size_t times_seen;
  size_t zones_seen;

  /* Table of local time zone abbrevations, terminated by a null entry.  */
  table local_time_zone_table[3];
} parser_control;

union YYSTYPE;
static int yylex (union YYSTYPE *, parser_control *);
static int yyerror (parser_control *, char *);
static long int time_zone_hhmm (textint, long int);



/* 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)
#line 197 "getdate.y"
typedef union YYSTYPE {
  long int intval;
  textint textintval;
  struct timespec timespec;
} YYSTYPE;
/* Line 191 of yacc.c.  */
#line 309 "y.tab.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.  */
#line 321 "y.tab.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  12
/* YYLAST -- Last index in YYTABLE.  */
#define YYLAST   78

/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS  26
/* YYNNTS -- Number of nonterminals. */
#define YYNNTS  18
/* YYNRULES -- Number of rules. */
#define YYNRULES  76
/* YYNRULES -- Number of states. */
#define YYNSTATES  94

/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
#define YYUNDEFTOK  2
#define YYMAXUTOK   276

#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,    24,     2,     2,    25,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,    23,     2,
       2,     2,     2,     2,    22,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     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,    16,    17,    18,    19,    20,    21
};

#if YYDEBUG
/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
   YYRHS.  */
static const unsigned char yyprhs[] =
{
       0,     0,     3,     5,     7,    10,    11,    14,    16,    18,
      20,    22,    24,    26,    28,    31,    36,    42,    49,    57,
      59,    62,    64,    68,    70,    73,    75,    78,    81,    84,
      88,    94,    98,   102,   106,   109,   114,   117,   121,   124,
     126,   129,   132,   135,   137,   140,   143,   146,   148,   151,
     154,   157,   159,   162,   165,   168,   170,   173,   176,   179,
     181,   184,   187,   190,   193,   196,   198,   200,   202,   204,
     206,   208,   210,   212,   213,   216,   217
};

/* YYRHS -- A `-1'-separated list of the rules' RHS. */
static const yysigned_char yyrhs[] =
{
      27,     0,    -1,    28,    -1,    29,    -1,    22,    38,    -1,
      -1,    29,    30,    -1,    31,    -1,    32,    -1,    33,    -1,
      35,    -1,    34,    -1,    36,    -1,    41,    -1,    19,    10,
      -1,    19,    23,    19,    43,    -1,    19,    23,    19,    18,
      42,    -1,    19,    23,    19,    23,    40,    43,    -1,    19,
      23,    19,    23,    40,    18,    42,    -1,     9,    -1,     9,
       4,    -1,    17,    -1,    17,    18,    42,    -1,     7,    -1,
      17,     4,    -1,     5,    -1,     5,    24,    -1,    14,     5,
      -1,    19,     5,    -1,    19,    25,    19,    -1,    19,    25,
      19,    25,    19,    -1,    19,    18,    18,    -1,    19,    12,
      18,    -1,    12,    18,    18,    -1,    12,    19,    -1,    12,
      19,    24,    19,    -1,    19,    12,    -1,    19,    12,    19,
      -1,    37,     3,    -1,    37,    -1,    14,    16,    -1,    19,
      16,    -1,    18,    16,    -1,    16,    -1,    14,    13,    -1,
      19,    13,    -1,    18,    13,    -1,    13,    -1,    14,     6,
      -1,    19,     6,    -1,    18,     6,    -1,     6,    -1,    14,
       8,    -1,    19,     8,    -1,    18,     8,    -1,     8,    -1,
      14,    11,    -1,    19,    11,    -1,    18,    11,    -1,    11,
      -1,    14,    15,    -1,    19,    15,    -1,    18,    15,    -1,
      20,    15,    -1,    21,    15,    -1,    15,    -1,    39,    -1,
      40,    -1,    20,    -1,    18,    -1,    21,    -1,    19,    -1,
      19,    -1,    -1,    23,    19,    -1,    -1,    10,    -1
};

/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
static const unsigned short yyrline[] =
{
       0,   218,   218,   219,   223,   230,   232,   236,   238,   240,
     242,   244,   246,   248,   252,   260,   268,   278,   285,   297,
     299,   304,   306,   308,   310,   315,   320,   325,   330,   338,
     343,   363,   370,   378,   386,   391,   397,   402,   411,   421,
     425,   427,   429,   431,   433,   435,   437,   439,   441,   443,
     445,   447,   449,   451,   453,   455,   457,   459,   461,   463,
     465,   467,   469,   471,   473,   475,   479,   479,   482,   483,
     488,   489,   494,   532,   533,   539,   540
};
#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", "tDST", "tDAY", "tDAY_UNIT", 
  "tDAYZONE", "tHOUR_UNIT", "tLOCAL_ZONE", "tMERIDIAN", "tMINUTE_UNIT", 
  "tMONTH", "tMONTH_UNIT", "tORDINAL", "tSEC_UNIT", "tYEAR_UNIT", "tZONE", 
  "tSNUMBER", "tUNUMBER", "tSDECIMAL_NUMBER", "tUDECIMAL_NUMBER", "'@'", 
  "':'", "','", "'/'", "$accept", "spec", "timespec", "items", "item", 
  "time", "local_zone", "zone", "day", "date", "rel", "relunit", 
  "seconds", "signed_seconds", "unsigned_seconds", "number", 
  "o_colon_minutes", "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,   271,   272,   273,   274,
     275,   276,    64,    58,    44,    47
};
# endif

/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
static const unsigned char yyr1[] =
{
       0,    26,    27,    27,    28,    29,    29,    30,    30,    30,
      30,    30,    30,    30,    31,    31,    31,    31,    31,    32,
      32,    33,    33,    33,    33,    34,    34,    34,    34,    35,
      35,    35,    35,    35,    35,    35,    35,    35,    36,    36,
      37,    37,    37,    37,    37,    37,    37,    37,    37,    37,
      37,    37,    37,    37,    37,    37,    37,    37,    37,    37,
      37,    37,    37,    37,    37,    37,    38,    38,    39,    39,
      40,    40,    41,    42,    42,    43,    43
};

/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
static const unsigned char yyr2[] =
{
       0,     2,     1,     1,     2,     0,     2,     1,     1,     1,
       1,     1,     1,     1,     2,     4,     5,     6,     7,     1,
       2,     1,     3,     1,     2,     1,     2,     2,     2,     3,
       5,     3,     3,     3,     2,     4,     2,     3,     2,     1,
       2,     2,     2,     1,     2,     2,     2,     1,     2,     2,
       2,     1,     2,     2,     2,     1,     2,     2,     2,     1,
       2,     2,     2,     2,     2,     1,     1,     1,     1,     1,
       1,     1,     1,     0,     2,     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[] =
{
       5,     0,     0,     2,     3,    69,    71,    68,    70,     4,
      66,    67,     1,    25,    51,    23,    55,    19,    59,     0,
      47,     0,    65,    43,    21,     0,    72,     0,     0,     6,
       7,     8,     9,    11,    10,    12,    39,    13,    26,    20,
       0,    34,    27,    48,    52,    56,    44,    60,    40,    24,
      73,    50,    54,    58,    46,    62,    42,    28,    49,    53,
      14,    57,    36,    45,    61,    41,     0,     0,     0,    63,
      64,    38,    33,     0,     0,    22,    32,    37,    31,    75,
      29,    35,    74,    76,    73,     0,    15,     0,    16,    75,
      30,    73,    17,    18
};

/* YYDEFGOTO[NTERM-NUM]. */
static const yysigned_char yydefgoto[] =
{
      -1,     2,     3,     4,    29,    30,    31,    32,    33,    34,
      35,    36,     9,    10,    11,    37,    75,    86
};

/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
   STATE-NUM.  */
#define YYPACT_NINF -66
static const yysigned_char yypact[] =
{
     -13,    42,    43,   -66,    16,   -66,   -66,   -66,   -66,   -66,
     -66,   -66,   -66,    29,   -66,   -66,   -66,    54,   -66,    -4,
     -66,    33,   -66,   -66,    -2,    39,    -5,    49,    50,   -66,
     -66,   -66,   -66,   -66,   -66,   -66,    63,   -66,   -66,   -66,
      51,    44,   -66,   -66,   -66,   -66,   -66,   -66,   -66,   -66,
      47,   -66,   -66,   -66,   -66,   -66,   -66,   -66,   -66,   -66,
     -66,   -66,    38,   -66,   -66,   -66,    53,    48,    55,   -66,
     -66,   -66,   -66,    56,    57,   -66,   -66,   -66,   -66,    -6,
      52,   -66,   -66,   -66,    47,    21,   -66,    59,   -66,    41,
     -66,    47,   -66,   -66
};

/* YYPGOTO[NTERM-NUM].  */
static const yysigned_char yypgoto[] =
{
     -66,   -66,   -66,   -66,   -66,   -66,   -66,   -66,   -66,   -66,
     -66,   -66,   -66,   -66,   -12,   -66,   -65,   -17
};

/* 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[] =
{
      57,    58,    49,    59,    83,    60,    61,    62,    63,     1,
      64,    65,    84,    66,    40,    41,    50,    85,    67,    88,
      68,    13,    14,    15,    16,    17,    93,    18,    19,    20,
      21,    22,    23,    24,    25,    26,    27,    28,    42,    43,
       6,    44,     8,    12,    45,    51,    46,    52,    47,    48,
      53,    83,    54,    38,    55,    56,    76,    77,    39,    91,
       5,     6,     7,     8,    69,    70,    71,    79,    73,    72,
      74,    78,    92,    89,    80,    81,    82,    87,    90
};

static const unsigned char yycheck[] =
{
       5,     6,     4,     8,    10,    10,    11,    12,    13,    22,
      15,    16,    18,    18,    18,    19,    18,    23,    23,    84,
      25,     5,     6,     7,     8,     9,    91,    11,    12,    13,
      14,    15,    16,    17,    18,    19,    20,    21,     5,     6,
      19,     8,    21,     0,    11,     6,    13,     8,    15,    16,
      11,    10,    13,    24,    15,    16,    18,    19,     4,    18,
      18,    19,    20,    21,    15,    15,     3,    19,    24,    18,
      23,    18,    89,    85,    19,    19,    19,    25,    19
};

/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
   symbol of state STATE-NUM.  */
static const unsigned char yystos[] =
{
       0,    22,    27,    28,    29,    18,    19,    20,    21,    38,
      39,    40,     0,     5,     6,     7,     8,     9,    11,    12,
      13,    14,    15,    16,    17,    18,    19,    20,    21,    30,
      31,    32,    33,    34,    35,    36,    37,    41,    24,     4,
      18,    19,     5,     6,     8,    11,    13,    15,    16,     4,
      18,     6,     8,    11,    13,    15,    16,     5,     6,     8,
      10,    11,    12,    13,    15,    16,    18,    23,    25,    15,
      15,     3,    18,    24,    23,    42,    18,    19,    18,    19,
      19,    19,    19,    10,    18,    23,    43,    25,    42,    40,
      19,    18,    43,    42
};

#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 (pc, "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 (&yylval, YYLEX_PARAM)
#else
# define YYLEX yylex (&yylval, pc)
#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 ( parser_control *pc );
#else
int yyparse ();
#endif
#endif /* ! YYPARSE_PARAM */






/*----------.
| 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 ( parser_control *pc )
#else
int
yyparse (pc)
     parser_control *pc ;
#endif
#endif
{
  /* The lookahead symbol.  */
int yychar;

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

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

  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 = 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:
#line 224 "getdate.y"
    {
	pc->seconds = yyvsp[0].timespec;
	pc->timespec_seen = true;
      }
    break;

  case 7:
#line 237 "getdate.y"
    { pc->times_seen++; }
    break;

  case 8:
#line 239 "getdate.y"
    { pc->local_zones_seen++; }
    break;

  case 9:
#line 241 "getdate.y"
    { pc->zones_seen++; }
    break;

  case 10:
#line 243 "getdate.y"
    { pc->dates_seen++; }
    break;

  case 11:
#line 245 "getdate.y"
    { pc->days_seen++; }
    break;

  case 12:
#line 247 "getdate.y"
    { pc->rels_seen++; }
    break;

  case 14:
#line 253 "getdate.y"
    {
	pc->hour = yyvsp[-1].textintval.value;
	pc->minutes = 0;
	pc->seconds.tv_sec = 0;
	pc->seconds.tv_nsec = 0;
	pc->meridian = yyvsp[0].intval;
      }
    break;

  case 15:
#line 261 "getdate.y"
    {
	pc->hour = yyvsp[-3].textintval.value;
	pc->minutes = yyvsp[-1].textintval.value;
	pc->seconds.tv_sec = 0;
	pc->seconds.tv_nsec = 0;
	pc->meridian = yyvsp[0].intval;
      }
    break;

  case 16:
#line 269 "getdate.y"
    {
	pc->hour = yyvsp[-4].textintval.value;
	pc->minutes = yyvsp[-2].textintval.value;
	pc->seconds.tv_sec = 0;
	pc->seconds.tv_nsec = 0;
	pc->meridian = MER24;
	pc->zones_seen++;
	pc->time_zone = time_zone_hhmm (yyvsp[-1].textintval, yyvsp[0].intval);
      }
    break;

  case 17:
#line 279 "getdate.y"
    {
	pc->hour = yyvsp[-5].textintval.value;
	pc->minutes = yyvsp[-3].textintval.value;
	pc->seconds = yyvsp[-1].timespec;
	pc->meridian = yyvsp[0].intval;
      }
    break;

  case 18:
#line 286 "getdate.y"
    {
	pc->hour = yyvsp[-6].textintval.value;
	pc->minutes = yyvsp[-4].textintval.value;
	pc->seconds = yyvsp[-2].timespec;
	pc->meridian = MER24;
	pc->zones_seen++;
	pc->time_zone = time_zone_hhmm (yyvsp[-1].textintval, yyvsp[0].intval);
      }
    break;

  case 19:
#line 298 "getdate.y"
    { pc->local_isdst = yyvsp[0].intval; }
    break;

  case 20:
#line 300 "getdate.y"
    { pc->local_isdst = yyvsp[-1].intval < 0 ? 1 : yyvsp[-1].intval + 1; }
    break;

  case 21:
#line 305 "getdate.y"
    { pc->time_zone = yyvsp[0].intval; }
    break;

  case 22:
#line 307 "getdate.y"
    { pc->time_zone = yyvsp[-2].intval + time_zone_hhmm (yyvsp[-1].textintval, yyvsp[0].intval); }
    break;

  case 23:
#line 309 "getdate.y"
    { pc->time_zone = yyvsp[0].intval + 60; }
    break;

  case 24:
#line 311 "getdate.y"
    { pc->time_zone = yyvsp[-1].intval + 60; }
    break;

  case 25:
#line 316 "getdate.y"
    {
	pc->day_ordinal = 1;
	pc->day_number = yyvsp[0].intval;
      }
    break;

  case 26:
#line 321 "getdate.y"
    {
	pc->day_ordinal = 1;
	pc->day_number = yyvsp[-1].intval;
      }
    break;

  case 27:
#line 326 "getdate.y"
    {
	pc->day_ordinal = yyvsp[-1].intval;
	pc->day_number = yyvsp[0].intval;
      }
    break;

  case 28:
#line 331 "getdate.y"
    {
	pc->day_ordinal = yyvsp[-1].textintval.value;
	pc->day_number = yyvsp[0].intval;
      }
    break;

  case 29:
#line 339 "getdate.y"
    {
	pc->month = yyvsp[-2].textintval.value;
	pc->day = yyvsp[0].textintval.value;
      }
    break;

  case 30:
#line 344 "getdate.y"
    {
	/* Interpret as YYYY/MM/DD if the first value has 4 or more digits,
	   otherwise as MM/DD/YY.
	   The goal in recognizing YYYY/MM/DD is solely to support legacy
	   machine-generated dates like those in an RCS log listing.  If
	   you want portability, use the ISO 8601 format.  */
	if (4 <= yyvsp[-4].textintval.digits)
	  {
	    pc->year = yyvsp[-4].textintval;
	    pc->month = yyvsp[-2].textintval.value;
	    pc->day = yyvsp[0].textintval.value;
	  }
	else
	  {
	    pc->month = yyvsp[-4].textintval.value;
	    pc->day = yyvsp[-2].textintval.value;
	    pc->year = yyvsp[0].textintval;
	  }
      }
    break;

  case 31:
#line 364 "getdate.y"
    {
	/* ISO 8601 format.  YYYY-MM-DD.  */
	pc->year = yyvsp[-2].textintval;
	pc->month = -yyvsp[-1].textintval.value;
	pc->day = -yyvsp[0].textintval.value;
      }
    break;

  case 32:
#line 371 "getdate.y"
    {
	/* e.g. 17-JUN-1992.  */
	pc->day = yyvsp[-2].textintval.value;
	pc->month = yyvsp[-1].intval;
	pc->year.value = -yyvsp[0].textintval.value;
	pc->year.digits = yyvsp[0].textintval.digits;
      }
    break;

  case 33:
#line 379 "getdate.y"
    {
	/* e.g. JUN-17-1992.  */
	pc->month = yyvsp[-2].intval;
	pc->day = -yyvsp[-1].textintval.value;
	pc->year.value = -yyvsp[0].textintval.value;
	pc->year.digits = yyvsp[0].textintval.digits;
      }
    break;

  case 34:
#line 387 "getdate.y"
    {
	pc->month = yyvsp[-1].intval;
	pc->day = yyvsp[0].textintval.value;
      }
    break;

  case 35:
#line 392 "getdate.y"
    {
	pc->month = yyvsp[-3].intval;
	pc->day = yyvsp[-2].textintval.value;
	pc->year = yyvsp[0].textintval;
      }
    break;

  case 36:
#line 398 "getdate.y"
    {
	pc->day = yyvsp[-1].textintval.value;
	pc->month = yyvsp[0].intval;
      }
    break;

  case 37:
#line 403 "getdate.y"
    {
	pc->day = yyvsp[-2].textintval.value;
	pc->month = yyvsp[-1].intval;
	pc->year = yyvsp[0].textintval;
      }
    break;

  case 38:
#line 412 "getdate.y"
    {
	pc->rel_ns = -pc->rel_ns;
	pc->rel_seconds = -pc->rel_seconds;
	pc->rel_minutes = -pc->rel_minutes;
	pc->rel_hour = -pc->rel_hour;
	pc->rel_day = -pc->rel_day;
	pc->rel_month = -pc->rel_month;
	pc->rel_year = -pc->rel_year;
      }
    break;

  case 40:
#line 426 "getdate.y"
    { pc->rel_year += yyvsp[-1].intval * yyvsp[0].intval; }
    break;

  case 41:
#line 428 "getdate.y"
    { pc->rel_year += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 42:
#line 430 "getdate.y"
    { pc->rel_year += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 43:
#line 432 "getdate.y"
    { pc->rel_year += yyvsp[0].intval; }
    break;

  case 44:
#line 434 "getdate.y"
    { pc->rel_month += yyvsp[-1].intval * yyvsp[0].intval; }
    break;

  case 45:
#line 436 "getdate.y"
    { pc->rel_month += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 46:
#line 438 "getdate.y"
    { pc->rel_month += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 47:
#line 440 "getdate.y"
    { pc->rel_month += yyvsp[0].intval; }
    break;

  case 48:
#line 442 "getdate.y"
    { pc->rel_day += yyvsp[-1].intval * yyvsp[0].intval; }
    break;

  case 49:
#line 444 "getdate.y"
    { pc->rel_day += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 50:
#line 446 "getdate.y"
    { pc->rel_day += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 51:
#line 448 "getdate.y"
    { pc->rel_day += yyvsp[0].intval; }
    break;

  case 52:
#line 450 "getdate.y"
    { pc->rel_hour += yyvsp[-1].intval * yyvsp[0].intval; }
    break;

  case 53:
#line 452 "getdate.y"
    { pc->rel_hour += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 54:
#line 454 "getdate.y"
    { pc->rel_hour += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 55:
#line 456 "getdate.y"
    { pc->rel_hour += yyvsp[0].intval; }
    break;

  case 56:
#line 458 "getdate.y"
    { pc->rel_minutes += yyvsp[-1].intval * yyvsp[0].intval; }
    break;

  case 57:
#line 460 "getdate.y"
    { pc->rel_minutes += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 58:
#line 462 "getdate.y"
    { pc->rel_minutes += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 59:
#line 464 "getdate.y"
    { pc->rel_minutes += yyvsp[0].intval; }
    break;

  case 60:
#line 466 "getdate.y"
    { pc->rel_seconds += yyvsp[-1].intval * yyvsp[0].intval; }
    break;

  case 61:
#line 468 "getdate.y"
    { pc->rel_seconds += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 62:
#line 470 "getdate.y"
    { pc->rel_seconds += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 63:
#line 472 "getdate.y"
    { pc->rel_seconds += yyvsp[-1].timespec.tv_sec * yyvsp[0].intval; pc->rel_ns += yyvsp[-1].timespec.tv_nsec * yyvsp[0].intval; }
    break;

  case 64:
#line 474 "getdate.y"
    { pc->rel_seconds += yyvsp[-1].timespec.tv_sec * yyvsp[0].intval; pc->rel_ns += yyvsp[-1].timespec.tv_nsec * yyvsp[0].intval; }
    break;

  case 65:
#line 476 "getdate.y"
    { pc->rel_seconds += yyvsp[0].intval; }
    break;

  case 69:
#line 484 "getdate.y"
    { yyval.timespec.tv_sec = yyvsp[0].textintval.value; yyval.timespec.tv_nsec = 0; }
    break;

  case 71:
#line 490 "getdate.y"
    { yyval.timespec.tv_sec = yyvsp[0].textintval.value; yyval.timespec.tv_nsec = 0; }
    break;

  case 72:
#line 495 "getdate.y"
    {
	if (pc->dates_seen
	    && ! pc->rels_seen && (pc->times_seen || 2 < yyvsp[0].textintval.digits))
	  pc->year = yyvsp[0].textintval;
	else
	  {
	    if (4 < yyvsp[0].textintval.digits)
	      {
		pc->dates_seen++;
		pc->day = yyvsp[0].textintval.value % 100;
		pc->month = (yyvsp[0].textintval.value / 100) % 100;
		pc->year.value = yyvsp[0].textintval.value / 10000;
		pc->year.digits = yyvsp[0].textintval.digits - 4;
	      }
	    else
	      {
		pc->times_seen++;
		if (yyvsp[0].textintval.digits <= 2)
		  {
		    pc->hour = yyvsp[0].textintval.value;
		    pc->minutes = 0;
		  }
		else
		  {
		    pc->hour = yyvsp[0].textintval.value / 100;
		    pc->minutes = yyvsp[0].textintval.value % 100;
		  }
		pc->seconds.tv_sec = 0;
		pc->seconds.tv_nsec = 0;
		pc->meridian = MER24;
	      }
	  }
      }
    break;

  case 73:
#line 532 "getdate.y"
    { yyval.intval = -1; }
    break;

  case 74:
#line 534 "getdate.y"
    { yyval.intval = yyvsp[0].textintval.value; }
    break;

  case 75:
#line 539 "getdate.y"
    { yyval.intval = MER24; }
    break;

  case 76:
#line 541 "getdate.y"
    { yyval.intval = yyvsp[0].intval; }
    break;


    }

/* Line 991 of yacc.c.  */
#line 1747 "y.tab.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 (pc, yymsg);
	      YYSTACK_FREE (yymsg);
	    }
	  else
	    yyerror (pc, "syntax error; also virtual memory exhausted");
	}
      else
#endif /* YYERROR_VERBOSE */
	yyerror (pc, "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 yyerrlab2;


/*----------------------------------------------------.
| yyerrlab1 -- error raised explicitly by an action.  |
`----------------------------------------------------*/
yyerrlab1:

  /* Suppress GCC warning that yyerrlab1 is unused when no action
     invokes YYERROR.  */
#if defined (__GNUC_MINOR__) && 2093 <= (__GNUC__ * 1000 + __GNUC_MINOR__)
  __attribute__ ((__unused__))
#endif


  goto yyerrlab2;


/*---------------------------------------------------------------.
| yyerrlab2 -- pop states until the error token can be shifted.  |
`---------------------------------------------------------------*/
yyerrlab2:
  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 (pc, "parser stack overflow");
  yyresult = 2;
  /* Fall through.  */
#endif

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


#line 544 "getdate.y"


static table const meridian_table[] =
{
  { "AM",   tMERIDIAN, MERam },
  { "A.M.", tMERIDIAN, MERam },
  { "PM",   tMERIDIAN, MERpm },
  { "P.M.", tMERIDIAN, MERpm },
  { NULL, 0, 0 }
};

static table const dst_table[] =
{
  { "DST", tDST, 0 }
};

static table const month_and_day_table[] =
{
  { "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, 0, 0 }
};

static table const time_units_table[] =
{
  { "YEAR",	tYEAR_UNIT,	 1 },
  { "MONTH",	tMONTH_UNIT,	 1 },
  { "FORTNIGHT",tDAY_UNIT,	14 },
  { "WEEK",	tDAY_UNIT,	 7 },
  { "DAY",	tDAY_UNIT,	 1 },
  { "HOUR",	tHOUR_UNIT,	 1 },
  { "MINUTE",	tMINUTE_UNIT,	 1 },
  { "MIN",	tMINUTE_UNIT,	 1 },
  { "SECOND",	tSEC_UNIT,	 1 },
  { "SEC",	tSEC_UNIT,	 1 },
  { NULL, 0, 0 }
};

/* Assorted relative-time words. */
static table const relative_time_table[] =
{
  { "TOMORROW",	tDAY_UNIT,	 1 },
  { "YESTERDAY",tDAY_UNIT,	-1 },
  { "TODAY",	tDAY_UNIT,	 0 },
  { "NOW",	tDAY_UNIT,	 0 },
  { "LAST",	tORDINAL,	-1 },
  { "THIS",	tORDINAL,	 0 },
  { "NEXT",	tORDINAL,	 1 },
  { "FIRST",	tORDINAL,	 1 },
/*{ "SECOND",	tORDINAL,	 2 }, */
  { "THIRD",	tORDINAL,	 3 },
  { "FOURTH",	tORDINAL,	 4 },
  { "FIFTH",	tORDINAL,	 5 },
  { "SIXTH",	tORDINAL,	 6 },
  { "SEVENTH",	tORDINAL,	 7 },
  { "EIGHTH",	tORDINAL,	 8 },
  { "NINTH",	tORDINAL,	 9 },
  { "TENTH",	tORDINAL,	10 },
  { "ELEVENTH",	tORDINAL,	11 },
  { "TWELFTH",	tORDINAL,	12 },
  { "AGO",	tAGO,		 1 },
  { NULL, 0, 0 }
};

/* The time zone table.  This table is necessarily incomplete, as time
   zone abbreviations are ambiguous; e.g. Australians interpret "EST"
   as Eastern time in Australia, not as US Eastern Standard Time.
   You cannot rely on getdate to handle arbitrary time zone
   abbreviations; use numeric abbreviations like `-0500' instead.  */
static table const time_zone_table[] =
{
  { "GMT",	tZONE,     HOUR ( 0) },	/* Greenwich Mean */
  { "UT",	tZONE,     HOUR ( 0) },	/* Universal (Coordinated) */
  { "UTC",	tZONE,     HOUR ( 0) },
  { "WET",	tZONE,     HOUR ( 0) },	/* Western European */
  { "WEST",	tDAYZONE,  HOUR ( 0) },	/* Western European Summer */
  { "BST",	tDAYZONE,  HOUR ( 0) },	/* British Summer */
  { "ART",	tZONE,	  -HOUR ( 3) },	/* Argentina */
  { "BRT",	tZONE,	  -HOUR ( 3) },	/* Brazil */
  { "BRST",	tDAYZONE, -HOUR ( 3) },	/* Brazil Summer */
  { "NST",	tZONE,	 -(HOUR ( 3) + 30) },	/* Newfoundland Standard */
  { "NDT",	tDAYZONE,-(HOUR ( 3) + 30) },	/* Newfoundland Daylight */
  { "AST",	tZONE,    -HOUR ( 4) },	/* Atlantic Standard */
  { "ADT",	tDAYZONE, -HOUR ( 4) },	/* Atlantic Daylight */
  { "CLT",	tZONE,    -HOUR ( 4) },	/* Chile */
  { "CLST",	tDAYZONE, -HOUR ( 4) },	/* Chile Summer */
  { "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 */
  { "AKST",	tZONE,    -HOUR ( 9) },	/* Alaska Standard */
  { "AKDT",	tDAYZONE, -HOUR ( 9) },	/* Alaska Daylight */
  { "HST",	tZONE,    -HOUR (10) },	/* Hawaii Standard */
  { "HAST",	tZONE,	  -HOUR (10) },	/* Hawaii-Aleutian Standard */
  { "HADT",	tDAYZONE, -HOUR (10) },	/* Hawaii-Aleutian Daylight */
  { "SST",	tZONE,    -HOUR (12) },	/* Samoa Standard */
  { "WAT",	tZONE,     HOUR ( 1) },	/* West Africa */
  { "CET",	tZONE,     HOUR ( 1) },	/* Central European */
  { "CEST",	tDAYZONE,  HOUR ( 1) },	/* Central European Summer */
  { "MET",	tZONE,     HOUR ( 1) },	/* Middle European */
  { "MEZ",	tZONE,     HOUR ( 1) },	/* Middle European */
  { "MEST",	tDAYZONE,  HOUR ( 1) },	/* Middle European Summer */
  { "MESZ",	tDAYZONE,  HOUR ( 1) },	/* Middle European Summer */
  { "EET",	tZONE,     HOUR ( 2) },	/* Eastern European */
  { "EEST",	tDAYZONE,  HOUR ( 2) },	/* Eastern European Summer */
  { "CAT",	tZONE,	   HOUR ( 2) },	/* Central Africa */
  { "SAST",	tZONE,	   HOUR ( 2) },	/* South Africa Standard */
  { "EAT",	tZONE,	   HOUR ( 3) },	/* East Africa */
  { "MSK",	tZONE,	   HOUR ( 3) },	/* Moscow */
  { "MSD",	tDAYZONE,  HOUR ( 3) },	/* Moscow Daylight */
  { "IST",	tZONE,	  (HOUR ( 5) + 30) },	/* India Standard */
  { "SGT",	tZONE,     HOUR ( 8) },	/* Singapore */
  { "KST",	tZONE,     HOUR ( 9) },	/* Korea Standard */
  { "JST",	tZONE,     HOUR ( 9) },	/* Japan Standard */
  { "GST",	tZONE,     HOUR (10) },	/* Guam Standard */
  { "NZST",	tZONE,     HOUR (12) },	/* New Zealand Standard */
  { "NZDT",	tDAYZONE,  HOUR (12) },	/* New Zealand Daylight */
  { NULL, 0, 0  }
};

/* Military time zone table. */
static table const military_table[] =
{
  { "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, 0, 0 }
};



/* Convert a time zone expressed as HH:MM into an integer count of
   minutes.  If MM is negative, then S is of the form HHMM and needs
   to be picked apart; otherwise, S is of the form HH.  */

static long int
time_zone_hhmm (textint s, long int mm)
{
  if (mm < 0)
    return (s.value / 100) * 60 + s.value % 100;
  else
    return s.value * 60 + (s.negative ? -mm : mm);
}

static int
to_hour (long int hours, int meridian)
{
  switch (meridian)
    {
    default: /* Pacify GCC.  */
    case MER24:
      return 0 <= hours && hours < 24 ? hours : -1;
    case MERam:
      return 0 < hours && hours < 12 ? hours : hours == 12 ? 0 : -1;
    case MERpm:
      return 0 < hours && hours < 12 ? hours + 12 : hours == 12 ? 12 : -1;
    }
}

static long int
to_year (textint textyear)
{
  long int year = textyear.value;

  if (year < 0)
    year = -year;

  /* XPG4 suggests that years 00-68 map to 2000-2068, and
     years 69-99 map to 1969-1999.  */
  else if (textyear.digits == 2)
    year += year < 69 ? 2000 : 1900;

  return year;
}

static table const *
lookup_zone (parser_control const *pc, char const *name)
{
  table const *tp;

  /* Try local zone abbreviations first; they're more likely to be right.  */
  for (tp = pc->local_time_zone_table; tp->name; tp++)
    if (strcmp (name, tp->name) == 0)
      return tp;

  for (tp = time_zone_table; tp->name; tp++)
    if (strcmp (name, tp->name) == 0)
      return tp;

  return NULL;
}

#if ! HAVE_TM_GMTOFF
/* Yield the difference between *A and *B,
   measured in seconds, ignoring leap seconds.
   The body of this function is taken directly from the GNU C Library;
   see src/strftime.c.  */
static long int
tm_diff (struct tm const *a, struct tm const *b)
{
  /* Compute intervening leap days correctly even if year is negative.
     Take care to avoid int overflow in leap day calculations.  */
  int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3);
  int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3);
  int a100 = a4 / 25 - (a4 % 25 < 0);
  int b100 = b4 / 25 - (b4 % 25 < 0);
  int a400 = SHR (a100, 2);
  int b400 = SHR (b100, 2);
  int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
  long int ayear = a->tm_year;
  long int years = ayear - b->tm_year;
  long int days = (365 * years + intervening_leap_days
		   + (a->tm_yday - b->tm_yday));
  return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
		+ (a->tm_min - b->tm_min))
	  + (a->tm_sec - b->tm_sec));
}
#endif /* ! HAVE_TM_GMTOFF */

static table const *
lookup_word (parser_control const *pc, char *word)
{
  char *p;
  char *q;
  size_t wordlen;
  table const *tp;
  bool period_found;
  bool abbrev;

  /* Make it uppercase.  */
  for (p = word; *p; p++)
    {
      unsigned char ch = *p;
      if (ISLOWER (ch))
	*p = toupper (ch);
    }

  for (tp = meridian_table; tp->name; tp++)
    if (strcmp (word, tp->name) == 0)
      return tp;

  /* See if we have an abbreviation for a month. */
  wordlen = strlen (word);
  abbrev = wordlen == 3 || (wordlen == 4 && word[3] == '.');

  for (tp = month_and_day_table; tp->name; tp++)
    if ((abbrev ? strncmp (word, tp->name, 3) : strcmp (word, tp->name)) == 0)
      return tp;

  if ((tp = lookup_zone (pc, word)))
    return tp;

  if (strcmp (word, dst_table[0].name) == 0)
    return dst_table;

  for (tp = time_units_table; tp->name; tp++)
    if (strcmp (word, tp->name) == 0)
      return tp;

  /* Strip off any plural and try the units table again. */
  if (word[wordlen - 1] == 'S')
    {
      word[wordlen - 1] = '\0';
      for (tp = time_units_table; tp->name; tp++)
	if (strcmp (word, tp->name) == 0)
	  return tp;
      word[wordlen - 1] = 'S';	/* For "this" in relative_time_table.  */
    }

  for (tp = relative_time_table; tp->name; tp++)
    if (strcmp (word, tp->name) == 0)
      return tp;

  /* Military time zones. */
  if (wordlen == 1)
    for (tp = military_table; tp->name; tp++)
      if (word[0] == tp->name[0])
	return tp;

  /* Drop out any periods and try the time zone table again. */
  for (period_found = false, p = q = word; (*p = *q); q++)
    if (*q == '.')
      period_found = true;
    else
      p++;
  if (period_found && (tp = lookup_zone (pc, word)))
    return tp;

  return NULL;
}

static int
yylex (YYSTYPE *lvalp, parser_control *pc)
{
  unsigned char c;
  size_t count;

  for (;;)
    {
      while (c = *pc->input, ISSPACE (c))
	pc->input++;

      if (ISDIGIT (c) || c == '-' || c == '+')
	{
	  char const *p;
	  int sign;
	  unsigned long int value;
	  if (c == '-' || c == '+')
	    {
	      sign = c == '-' ? -1 : 1;
	      while (c = *++pc->input, ISSPACE (c))
		continue;
	      if (! ISDIGIT (c))
		/* skip the '-' sign */
		continue;
	    }
	  else
	    sign = 0;
	  p = pc->input;
	  for (value = 0; ; value *= 10)
	    {
	      unsigned long int value1 = value + (c - '0');
	      if (value1 < value)
		return '?';
	      value = value1;
	      c = *++p;
	      if (! ISDIGIT (c))
		break;
	      if (ULONG_MAX / 10 < value)
		return '?';
	    }
	  if ((c == '.' || c == ',') && ISDIGIT (p[1]))
	    {
	      time_t s;
	      int ns;
	      int digits;
	      unsigned long int value1;

	      /* Check for overflow when converting value to time_t.  */
	      if (sign < 0)
		{
		  s = - value;
		  if (0 < s)
		    return '?';
		  value1 = -s;
		}
	      else
		{
		  s = value;
		  if (s < 0)
		    return '?';
		  value1 = s;
		}
	      if (value != value1)
		return '?';

	      /* Accumulate fraction, to ns precision.  */
	      p++;
	      ns = *p++ - '0';
	      for (digits = 2; digits <= LOG10_BILLION; digits++)
		{
		  ns *= 10;
		  if (ISDIGIT (*p))
		    ns += *p++ - '0';
		}

	      /* Skip excess digits, truncating toward -Infinity.  */
	      if (sign < 0)
		for (; ISDIGIT (*p); p++)
		  if (*p != '0')
		    {
		      ns++;
		      break;
		    }
	      while (ISDIGIT (*p))
		p++;

	      /* Adjust to the timespec convention, which is that
		 tv_nsec is always a positive offset even if tv_sec is
		 negative.  */
	      if (sign < 0 && ns)
		{
		  s--;
		  if (! (s < 0))
		    return '?';
		  ns = BILLION - ns;
		}

	      lvalp->timespec.tv_sec = s;
	      lvalp->timespec.tv_nsec = ns;
	      pc->input = p;
	      return sign ? tSDECIMAL_NUMBER : tUDECIMAL_NUMBER;
	    }
	  else
	    {
	      lvalp->textintval.negative = sign < 0;
	      if (sign < 0)
		{
		  lvalp->textintval.value = - value;
		  if (0 < lvalp->textintval.value)
		    return '?';
		}
	      else
		{
		  lvalp->textintval.value = value;
		  if (lvalp->textintval.value < 0)
		    return '?';
		}
	      lvalp->textintval.digits = p - pc->input;
	      pc->input = p;
	      return sign ? tSNUMBER : tUNUMBER;
	    }
	}

      if (ISALPHA (c))
	{
	  char buff[20];
	  char *p = buff;
	  table const *tp;

	  do
	    {
	      if (p < buff + sizeof buff - 1)
		*p++ = c;
	      c = *++pc->input;
	    }
	  while (ISALPHA (c) || c == '.');

	  *p = '\0';
	  tp = lookup_word (pc, buff);
	  if (! tp)
	    return '?';
	  lvalp->intval = tp->value;
	  return tp->type;
	}

      if (c != '(')
	return *pc->input++;
      count = 0;
      do
	{
	  c = *pc->input++;
	  if (c == '\0')
	    return c;
	  if (c == '(')
	    count++;
	  else if (c == ')')
	    count--;
	}
      while (count != 0);
    }
}

/* Do nothing if the parser reports an error.  */
static int
yyerror (parser_control *pc ATTRIBUTE_UNUSED, char *s ATTRIBUTE_UNUSED)
{
  return 0;
}

/* If *TM0 is the old and *TM1 is the new value of a struct tm after
   passing it to mktime, return true if it's OK that mktime returned T.
   It's not OK if *TM0 has out-of-range members.  */

static bool
mktime_ok (struct tm const *tm0, struct tm const *tm1, time_t t)
{
  if (t == (time_t) -1)
    {
      /* Guard against falsely reporting an error when parsing a time
	 stamp that happens to equal (time_t) -1, on a host that
	 supports such a time stamp.  */
      tm1 = localtime (&t);
      if (!tm1)
	return false;
    }

  return ! ((tm0->tm_sec ^ tm1->tm_sec)
	    | (tm0->tm_min ^ tm1->tm_min)
	    | (tm0->tm_hour ^ tm1->tm_hour)
	    | (tm0->tm_mday ^ tm1->tm_mday)
	    | (tm0->tm_mon ^ tm1->tm_mon)
	    | (tm0->tm_year ^ tm1->tm_year));
}

/* A reasonable upper bound for the size of ordinary TZ strings.
   Use heap allocation if TZ's length exceeds this.  */
enum { TZBUFSIZE = 100 };

/* Return a copy of TZ, stored in TZBUF if it fits, and heap-allocated
   otherwise.  */
static char *
get_tz (char tzbuf[TZBUFSIZE])
{
  char *tz = getenv ("TZ");
  if (tz)
    {
      size_t tzsize = strlen (tz) + 1;
      tz = (tzsize <= TZBUFSIZE
	    ? memcpy (tzbuf, tz, tzsize)
	    : xmemdup (tz, tzsize));
    }
  return tz;
}

/* Parse a date/time string, storing the resulting time value into *RESULT.
   The string itself is pointed to by P.  Return true if successful.
   P can be an incomplete or relative time specification; if so, use
   *NOW as the basis for the returned time.  */
bool
get_date (struct timespec *result, char const *p, struct timespec const *now)
{
  time_t Start;
  long int Start_ns;
  struct tm const *tmp;
  struct tm tm;
  struct tm tm0;
  parser_control pc;
  struct timespec gettime_buffer;
  unsigned char c;
  bool tz_was_altered = false;
  char *tz0 = NULL;
  char tz0buf[TZBUFSIZE];
  bool ok = true;

  if (! now)
    {
      if (gettime (&gettime_buffer) != 0)
	return false;
      now = &gettime_buffer;
    }

  Start = now->tv_sec;
  Start_ns = now->tv_nsec;

  tmp = localtime (&now->tv_sec);
  if (! tmp)
    return false;

  while (c = *p, ISSPACE (c))
    p++;

  if (strncmp (p, "TZ=\"", 4) == 0)
    {
      char const *tzbase = p + 4;
      size_t tzsize = 1;
      char const *s;

      for (s = tzbase; *s; s++, tzsize++)
	if (*s == '\\')
	  {
	    s++;
	    if (! (*s == '\\' || *s == '"'))
	      break;
	  }
	else if (*s == '"')
	  {
	    char *z;
	    char *tz1;
	    char tz1buf[TZBUFSIZE];
	    bool large_tz = TZBUFSIZE < tzsize;
	    bool setenv_ok;
	    tz0 = get_tz (tz0buf);
	    z = tz1 = large_tz ? xmalloc (tzsize) : tz1buf;
	    for (s = tzbase; *s != '"'; s++)
	      *z++ = *(s += *s == '\\');
	    *z = '\0';
	    setenv_ok = setenv ("TZ", tz1, 1) == 0;
	    if (large_tz)
	      free (tz1);
	    if (!setenv_ok)
	      goto fail;
	    tz_was_altered = true;
	    p = s + 1;
	  }
    }

  pc.input = p;
  pc.year.value = tmp->tm_year;
  pc.year.value += TM_YEAR_BASE;
  pc.year.digits = 4;
  pc.month = tmp->tm_mon + 1;
  pc.day = tmp->tm_mday;
  pc.hour = tmp->tm_hour;
  pc.minutes = tmp->tm_min;
  pc.seconds.tv_sec = tmp->tm_sec;
  pc.seconds.tv_nsec = Start_ns;
  tm.tm_isdst = tmp->tm_isdst;

  pc.meridian = MER24;
  pc.rel_ns = 0;
  pc.rel_seconds = 0;
  pc.rel_minutes = 0;
  pc.rel_hour = 0;
  pc.rel_day = 0;
  pc.rel_month = 0;
  pc.rel_year = 0;
  pc.timespec_seen = false;
  pc.dates_seen = 0;
  pc.days_seen = 0;
  pc.rels_seen = 0;
  pc.times_seen = 0;
  pc.local_zones_seen = 0;
  pc.zones_seen = 0;

#if HAVE_STRUCT_TM_TM_ZONE
  pc.local_time_zone_table[0].name = tmp->tm_zone;
  pc.local_time_zone_table[0].type = tLOCAL_ZONE;
  pc.local_time_zone_table[0].value = tmp->tm_isdst;
  pc.local_time_zone_table[1].name = NULL;

  /* Probe the names used in the next three calendar quarters, looking
     for a tm_isdst different from the one we already have.  */
  {
    int quarter;
    for (quarter = 1; quarter <= 3; quarter++)
      {
	time_t probe = Start + quarter * (90 * 24 * 60 * 60);
	struct tm const *probe_tm = localtime (&probe);
	if (probe_tm && probe_tm->tm_zone
	    && probe_tm->tm_isdst != pc.local_time_zone_table[0].value)
	  {
	      {
		pc.local_time_zone_table[1].name = probe_tm->tm_zone;
		pc.local_time_zone_table[1].type = tLOCAL_ZONE;
		pc.local_time_zone_table[1].value = probe_tm->tm_isdst;
		pc.local_time_zone_table[2].name = NULL;
	      }
	    break;
	  }
      }
  }
#else
#if HAVE_TZNAME
  {
# ifndef tzname
    extern char *tzname[];
# endif
    int i;
    for (i = 0; i < 2; i++)
      {
	pc.local_time_zone_table[i].name = tzname[i];
	pc.local_time_zone_table[i].type = tLOCAL_ZONE;
	pc.local_time_zone_table[i].value = i;
      }
    pc.local_time_zone_table[i].name = NULL;
  }
#else
  pc.local_time_zone_table[0].name = NULL;
#endif
#endif

  if (pc.local_time_zone_table[0].name && pc.local_time_zone_table[1].name
      && ! strcmp (pc.local_time_zone_table[0].name,
		   pc.local_time_zone_table[1].name))
    {
      /* This locale uses the same abbrevation for standard and
	 daylight times.  So if we see that abbreviation, we don't
	 know whether it's daylight time.  */
      pc.local_time_zone_table[0].value = -1;
      pc.local_time_zone_table[1].name = NULL;
    }

  if (yyparse (&pc) != 0)
    goto fail;

  if (pc.timespec_seen)
    *result = pc.seconds;
  else
    {
      if (1 < pc.times_seen || 1 < pc.dates_seen || 1 < pc.days_seen
	  || 1 < (pc.local_zones_seen + pc.zones_seen)
	  || (pc.local_zones_seen && 1 < pc.local_isdst))
	goto fail;

      tm.tm_year = to_year (pc.year) - TM_YEAR_BASE;
      tm.tm_mon = pc.month - 1;
      tm.tm_mday = pc.day;
      if (pc.times_seen || (pc.rels_seen && ! pc.dates_seen && ! pc.days_seen))
	{
	  tm.tm_hour = to_hour (pc.hour, pc.meridian);
	  if (tm.tm_hour < 0)
	    goto fail;
	  tm.tm_min = pc.minutes;
	  tm.tm_sec = pc.seconds.tv_sec;
	}
      else
	{
	  tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
	  pc.seconds.tv_nsec = 0;
	}

      /* Let mktime deduce tm_isdst if we have an absolute time stamp.  */
      if (pc.dates_seen | pc.days_seen | pc.times_seen)
	tm.tm_isdst = -1;

      /* But if the input explicitly specifies local time with or without
	 DST, give mktime that information.  */
      if (pc.local_zones_seen)
	tm.tm_isdst = pc.local_isdst;

      tm0 = tm;

      Start = mktime (&tm);

      if (! mktime_ok (&tm0, &tm, Start))
	{
	  if (! pc.zones_seen)
	    goto fail;
	  else
	    {
	      /* Guard against falsely reporting errors near the time_t
		 boundaries when parsing times in other time zones.  For
		 example, suppose the input string "1969-12-31 23:00:00 -0100",
		 the current time zone is 8 hours ahead of UTC, and the min
		 time_t value is 1970-01-01 00:00:00 UTC.  Then the min
		 localtime value is 1970-01-01 08:00:00, and mktime will
		 therefore fail on 1969-12-31 23:00:00.  To work around the
		 problem, set the time zone to 1 hour behind UTC temporarily
		 by setting TZ="XXX1:00" and try mktime again.  */

	      long int time_zone = pc.time_zone;
	      long int abs_time_zone = time_zone < 0 ? - time_zone : time_zone;
	      long int abs_time_zone_hour = abs_time_zone / 60;
	      int abs_time_zone_min = abs_time_zone % 60;
	      char tz1buf[sizeof "XXX+0:00"
			  + sizeof pc.time_zone * CHAR_BIT / 3];
	      if (!tz_was_altered)
		tz0 = get_tz (tz0buf);
	      sprintf (tz1buf, "XXX%s%ld:%02d", "-" + (time_zone < 0),
		       abs_time_zone_hour, abs_time_zone_min);
	      if (setenv ("TZ", tz1buf, 1) != 0)
		goto fail;
	      tz_was_altered = true;
	      tm = tm0;
	      Start = mktime (&tm);
	      if (! mktime_ok (&tm0, &tm, Start))
		goto fail;
	    }
	}

      if (pc.days_seen && ! pc.dates_seen)
	{
	  tm.tm_mday += ((pc.day_number - tm.tm_wday + 7) % 7
			 + 7 * (pc.day_ordinal - (0 < pc.day_ordinal)));
	  tm.tm_isdst = -1;
	  Start = mktime (&tm);
	  if (Start == (time_t) -1)
	    goto fail;
	}

      if (pc.zones_seen)
	{
	  long int delta = pc.time_zone * 60;
	  time_t t1;
#ifdef HAVE_TM_GMTOFF
	  delta -= tm.tm_gmtoff;
#else
	  time_t t = Start;
	  struct tm const *gmt = gmtime (&t);
	  if (! gmt)
	    goto fail;
	  delta -= tm_diff (&tm, gmt);
#endif
	  t1 = Start - delta;
	  if ((Start < t1) != (delta < 0))
	    goto fail;	/* time_t overflow */
	  Start = t1;
	}

      /* Add relative date.  */
      if (pc.rel_year | pc.rel_month | pc.rel_day)
	{
	  int year = tm.tm_year + pc.rel_year;
	  int month = tm.tm_mon + pc.rel_month;
	  int day = tm.tm_mday + pc.rel_day;
	  if (((year < tm.tm_year) ^ (pc.rel_year < 0))
	      | ((month < tm.tm_mon) ^ (pc.rel_month < 0))
	      | ((day < tm.tm_mday) ^ (pc.rel_day < 0)))
	    goto fail;
	  tm.tm_year = year;
	  tm.tm_mon = month;
	  tm.tm_mday = day;
	  Start = mktime (&tm);
	  if (Start == (time_t) -1)
	    goto fail;
	}

      /* Add relative hours, minutes, and seconds.  On hosts that support
	 leap seconds, ignore the possibility of leap seconds; e.g.,
	 "+ 10 minutes" adds 600 seconds, even if one of them is a
	 leap second.  Typically this is not what the user wants, but it's
	 too hard to do it the other way, because the time zone indicator
	 must be applied before relative times, and if mktime is applied
	 again the time zone will be lost.  */
      {
	long int sum_ns = pc.seconds.tv_nsec + pc.rel_ns;
	long int normalized_ns = (sum_ns % BILLION + BILLION) % BILLION;
	time_t t0 = Start;
	long int d1 = 60 * 60 * pc.rel_hour;
	time_t t1 = t0 + d1;
	long int d2 = 60 * pc.rel_minutes;
	time_t t2 = t1 + d2;
	long int d3 = pc.rel_seconds;
	time_t t3 = t2 + d3;
	long int d4 = (sum_ns - normalized_ns) / BILLION;
	time_t t4 = t3 + d4;

	if ((d1 / (60 * 60) ^ pc.rel_hour)
	    | (d2 / 60 ^ pc.rel_minutes)
	    | ((t1 < t0) ^ (d1 < 0))
	    | ((t2 < t1) ^ (d2 < 0))
	    | ((t3 < t2) ^ (d3 < 0))
	    | ((t4 < t3) ^ (d4 < 0)))
	  goto fail;

	result->tv_sec = t4;
	result->tv_nsec = normalized_ns;
      }
    }

  goto done;

 fail:
  ok = false;
 done:
  if (tz_was_altered)
    ok &= (tz0 ? setenv ("TZ", tz0, 1) : unsetenv ("TZ")) == 0;
  if (tz0 != tz0buf)
    free (tz0);
  return ok;
}

#if TEST

int
main (int ac, char **av)
{
  char buff[BUFSIZ];

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

  buff[BUFSIZ - 1] = '\0';
  while (fgets (buff, BUFSIZ - 1, stdin) && buff[0])
    {
      struct timespec d;
      struct tm const *tm;
      if (! get_date (&d, buff, NULL))
	printf ("Bad format - couldn't convert.\n");
      else if (! (tm = localtime (&d.tv_sec)))
	{
	  long int sec = d.tv_sec;
	  printf ("localtime (%ld) failed\n", sec);
	}
      else
	{
	  int ns = d.tv_nsec;
	  printf ("%04ld-%02d-%02d %02d:%02d:%02d.%09d\n",
		  tm->tm_year + 1900L, tm->tm_mon + 1, tm->tm_mday,
		  tm->tm_hour, tm->tm_min, tm->tm_sec, ns);
	}
      printf ("\t> ");
      fflush (stdout);
    }
  return 0;
}
#endif /* TEST */