getdate.c

Go to the documentation of this file.

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

/* 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 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,
     tSEC_UNIT = 269,
     tYEAR_UNIT = 270,
     tZONE = 271,
     tSNUMBER = 272,
     tUNUMBER = 273
   };
#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 tSEC_UNIT 269
#define tYEAR_UNIT 270
#define tZONE 271
#define tSNUMBER 272
#define tUNUMBER 273




/* 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 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.  Unlike previous versions, this
   version is reentrant.  */

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

#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 <stdlib.h> /* for `free'; used by Bison 1.27 */

#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))
#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))

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

#include <string.h>

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

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

#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
{
  int value;
  int 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 };

/* 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.  */
  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.  */
  int time_zone;

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

  /* Gregorian year, month, day, hour, minutes, and seconds.  */
  textint year;
  int month;
  int day;
  int hour;
  int minutes;
  int seconds;

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

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

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

#define PC (* (parser_control *) parm)
#define YYLEX_PARAM parm
#define YYPARSE_PARAM parm

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



/* 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 167 "getdate.y"
typedef union YYSTYPE {
  int intval;
  textint textintval;
} YYSTYPE;
/* Line 191 of yacc.c.  */
#line 276 "getdate.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 288 "getdate.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   55

/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS  22
/* YYNNTS -- Number of nonterminals. */
#define YYNNTS  12
/* YYNRULES -- Number of rules. */
#define YYNRULES  55
/* YYNRULES -- Number of states. */
#define YYNSTATES  66

/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
#define YYUNDEFTOK  2
#define YYMAXUTOK   273

#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,    20,     2,     2,    21,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,    19,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
       5,     6,     7,     8,     9,    10,    11,    12,    13,    14,
      15,    16,    17,    18
};

#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,    21,    24,    29,    34,    41,    48,    50,    53,    55,
      57,    60,    62,    65,    68,    72,    78,    82,    86,    90,
      93,    98,   101,   105,   108,   110,   113,   116,   118,   121,
     124,   126,   129,   132,   134,   137,   140,   142,   145,   148,
     150,   153,   156,   158,   160,   161
};

/* YYRHS -- A `-1'-separated list of the rules' RHS. */
static const yysigned_char yyrhs[] =
{
      23,     0,    -1,    -1,    23,    24,    -1,    25,    -1,    26,
      -1,    27,    -1,    29,    -1,    28,    -1,    30,    -1,    32,
      -1,    18,    10,    -1,    18,    19,    18,    33,    -1,    18,
      19,    18,    17,    -1,    18,    19,    18,    19,    18,    33,
      -1,    18,    19,    18,    19,    18,    17,    -1,     9,    -1,
       9,     4,    -1,    16,    -1,     7,    -1,    16,     4,    -1,
       5,    -1,     5,    20,    -1,    18,     5,    -1,    18,    21,
      18,    -1,    18,    21,    18,    21,    18,    -1,    18,    17,
      17,    -1,    18,    12,    17,    -1,    12,    17,    17,    -1,
      12,    18,    -1,    12,    18,    20,    18,    -1,    18,    12,
      -1,    18,    12,    18,    -1,    31,     3,    -1,    31,    -1,
      18,    15,    -1,    17,    15,    -1,    15,    -1,    18,    13,
      -1,    17,    13,    -1,    13,    -1,    18,     6,    -1,    17,
       6,    -1,     6,    -1,    18,     8,    -1,    17,     8,    -1,
       8,    -1,    18,    11,    -1,    17,    11,    -1,    11,    -1,
      18,    14,    -1,    17,    14,    -1,    14,    -1,    18,    -1,
      -1,    10,    -1
};

/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
static const unsigned short yyrline[] =
{
       0,   183,   183,   185,   189,   191,   193,   195,   197,   199,
     201,   205,   212,   219,   227,   234,   246,   248,   253,   255,
     257,   262,   267,   272,   280,   285,   305,   312,   320,   328,
     333,   339,   344,   353,   362,   366,   368,   370,   372,   374,
     376,   378,   380,   382,   384,   386,   388,   390,   392,   394,
     396,   398,   400,   405,   442,   443
};
#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", "tSEC_UNIT", "tYEAR_UNIT", "tZONE", "tSNUMBER", 
  "tUNUMBER", "':'", "','", "'/'", "$accept", "spec", "item", "time", 
  "local_zone", "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,   271,   272,   273,    58,
      44,    47
};
# endif

/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
static const unsigned char yyr1[] =
{
       0,    22,    23,    23,    24,    24,    24,    24,    24,    24,
      24,    25,    25,    25,    25,    25,    26,    26,    27,    27,
      27,    28,    28,    28,    29,    29,    29,    29,    29,    29,
      29,    29,    29,    30,    30,    31,    31,    31,    31,    31,
      31,    31,    31,    31,    31,    31,    31,    31,    31,    31,
      31,    31,    31,    32,    33,    33
};

/* 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,
       1,     2,     4,     4,     6,     6,     1,     2,     1,     1,
       2,     1,     2,     2,     3,     5,     3,     3,     3,     2,
       4,     2,     3,     2,     1,     2,     2,     1,     2,     2,
       1,     2,     2,     1,     2,     2,     1,     2,     2,     1,
       2,     2,     1,     1,     0,     1
};

/* 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,    21,    43,    19,    46,    16,    49,     0,
      40,    52,    37,    18,     0,    53,     3,     4,     5,     6,
       8,     7,     9,    34,    10,    22,    17,     0,    29,    20,
      42,    45,    48,    39,    51,    36,    23,    41,    44,    11,
      47,    31,    38,    50,    35,     0,     0,     0,    33,    28,
       0,    27,    32,    26,    54,    24,    30,    55,    13,     0,
      12,     0,    54,    25,    15,    14
};

/* YYDEFGOTO[NTERM-NUM]. */
static const yysigned_char yydefgoto[] =
{
      -1,     1,    16,    17,    18,    19,    20,    21,    22,    23,
      24,    60
};

/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
   STATE-NUM.  */
#define YYPACT_NINF -17
static const yysigned_char yypact[] =
{
     -17,     0,   -17,     1,   -17,   -17,   -17,    19,   -17,   -16,
     -17,   -17,   -17,    32,    26,    14,   -17,   -17,   -17,   -17,
     -17,   -17,   -17,    27,   -17,   -17,   -17,   -13,    24,   -17,
     -17,   -17,   -17,   -17,   -17,   -17,   -17,   -17,   -17,   -17,
     -17,    25,   -17,   -17,   -17,    29,    30,    31,   -17,   -17,
      33,   -17,   -17,   -17,    28,    34,   -17,   -17,   -17,    35,
     -17,    36,    -7,   -17,   -17,   -17
};

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

/* 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,    27,    28,    57,    49,     3,     4,     5,     6,     7,
      64,     8,     9,    10,    11,    12,    13,    14,    15,    36,
      37,    25,    38,    26,    39,    40,    41,    42,    43,    44,
      48,    45,    30,    46,    31,    47,    29,    32,    57,    33,
      34,    35,    51,    52,    50,    58,    53,    59,    54,    55,
      65,    56,     0,    62,    63,    61
};

static const yysigned_char yycheck[] =
{
       0,    17,    18,    10,    17,     5,     6,     7,     8,     9,
      17,    11,    12,    13,    14,    15,    16,    17,    18,     5,
       6,    20,     8,     4,    10,    11,    12,    13,    14,    15,
       3,    17,     6,    19,     8,    21,     4,    11,    10,    13,
      14,    15,    17,    18,    20,    17,    17,    19,    18,    18,
      62,    18,    -1,    18,    18,    21
};

/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
   symbol of state STATE-NUM.  */
static const unsigned char yystos[] =
{
       0,    23,     0,     5,     6,     7,     8,     9,    11,    12,
      13,    14,    15,    16,    17,    18,    24,    25,    26,    27,
      28,    29,    30,    31,    32,    20,     4,    17,    18,     4,
       6,     8,    11,    13,    14,    15,     5,     6,     8,    10,
      11,    12,    13,    14,    15,    17,    19,    21,     3,    17,
      20,    17,    18,    17,    18,    18,    18,    10,    17,    19,
      33,    21,    18,    18,    17,    33
};

#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 (&yylval, YYLEX_PARAM)
#else
# define YYLEX yylex (&yylval)
#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 yylno = yyrline[yyrule];
  YYFPRINTF (stderr, "Reducing stack by rule %d (line %u), ",
             yyrule - 1, yylno);
  /* 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 */






/*----------.
| 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
{
  /* 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 190 "getdate.y"
    { PC.times_seen++; }
    break;

  case 5:
#line 192 "getdate.y"
    { PC.local_zones_seen++; }
    break;

  case 6:
#line 194 "getdate.y"
    { PC.zones_seen++; }
    break;

  case 7:
#line 196 "getdate.y"
    { PC.dates_seen++; }
    break;

  case 8:
#line 198 "getdate.y"
    { PC.days_seen++; }
    break;

  case 9:
#line 200 "getdate.y"
    { PC.rels_seen++; }
    break;

  case 11:
#line 206 "getdate.y"
    {
        PC.hour = yyvsp[-1].textintval.value;
        PC.minutes = 0;
        PC.seconds = 0;
        PC.meridian = yyvsp[0].intval;
      }
    break;

  case 12:
#line 213 "getdate.y"
    {
        PC.hour = yyvsp[-3].textintval.value;
        PC.minutes = yyvsp[-1].textintval.value;
        PC.seconds = 0;
        PC.meridian = yyvsp[0].intval;
      }
    break;

  case 13:
#line 220 "getdate.y"
    {
        PC.hour = yyvsp[-3].textintval.value;
        PC.minutes = yyvsp[-1].textintval.value;
        PC.meridian = MER24;
        PC.zones_seen++;
        PC.time_zone = yyvsp[0].textintval.value % 100 + (yyvsp[0].textintval.value / 100) * 60;
      }
    break;

  case 14:
#line 228 "getdate.y"
    {
        PC.hour = yyvsp[-5].textintval.value;
        PC.minutes = yyvsp[-3].textintval.value;
        PC.seconds = yyvsp[-1].textintval.value;
        PC.meridian = yyvsp[0].intval;
      }
    break;

  case 15:
#line 235 "getdate.y"
    {
        PC.hour = yyvsp[-5].textintval.value;
        PC.minutes = yyvsp[-3].textintval.value;
        PC.seconds = yyvsp[-1].textintval.value;
        PC.meridian = MER24;
        PC.zones_seen++;
        PC.time_zone = yyvsp[0].textintval.value % 100 + (yyvsp[0].textintval.value / 100) * 60;
      }
    break;

  case 16:
#line 247 "getdate.y"
    { PC.local_isdst = yyvsp[0].intval; }
    break;

  case 17:
#line 249 "getdate.y"
    { PC.local_isdst = yyvsp[-1].intval < 0 ? 1 : yyvsp[-1].intval + 1; }
    break;

  case 18:
#line 254 "getdate.y"
    { PC.time_zone = yyvsp[0].intval; }
    break;

  case 19:
#line 256 "getdate.y"
    { PC.time_zone = yyvsp[0].intval + 60; }
    break;

  case 20:
#line 258 "getdate.y"
    { PC.time_zone = yyvsp[-1].intval + 60; }
    break;

  case 21:
#line 263 "getdate.y"
    {
        PC.day_ordinal = 1;
        PC.day_number = yyvsp[0].intval;
      }
    break;

  case 22:
#line 268 "getdate.y"
    {
        PC.day_ordinal = 1;
        PC.day_number = yyvsp[-1].intval;
      }
    break;

  case 23:
#line 273 "getdate.y"
    {
        PC.day_ordinal = yyvsp[-1].textintval.value;
        PC.day_number = yyvsp[0].intval;
      }
    break;

  case 24:
#line 281 "getdate.y"
    {
        PC.month = yyvsp[-2].textintval.value;
        PC.day = yyvsp[0].textintval.value;
      }
    break;

  case 25:
#line 286 "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 26:
#line 306 "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 27:
#line 313 "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 28:
#line 321 "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 29:
#line 329 "getdate.y"
    {
        PC.month = yyvsp[-1].intval;
        PC.day = yyvsp[0].textintval.value;
      }
    break;

  case 30:
#line 334 "getdate.y"
    {
        PC.month = yyvsp[-3].intval;
        PC.day = yyvsp[-2].textintval.value;
        PC.year = yyvsp[0].textintval;
      }
    break;

  case 31:
#line 340 "getdate.y"
    {
        PC.day = yyvsp[-1].textintval.value;
        PC.month = yyvsp[0].intval;
      }
    break;

  case 32:
#line 345 "getdate.y"
    {
        PC.day = yyvsp[-2].textintval.value;
        PC.month = yyvsp[-1].intval;
        PC.year = yyvsp[0].textintval;
      }
    break;

  case 33:
#line 354 "getdate.y"
    {
        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 35:
#line 367 "getdate.y"
    { PC.rel_year += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 36:
#line 369 "getdate.y"
    { PC.rel_year += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 37:
#line 371 "getdate.y"
    { PC.rel_year += yyvsp[0].intval; }
    break;

  case 38:
#line 373 "getdate.y"
    { PC.rel_month += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 39:
#line 375 "getdate.y"
    { PC.rel_month += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 40:
#line 377 "getdate.y"
    { PC.rel_month += yyvsp[0].intval; }
    break;

  case 41:
#line 379 "getdate.y"
    { PC.rel_day += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 42:
#line 381 "getdate.y"
    { PC.rel_day += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 43:
#line 383 "getdate.y"
    { PC.rel_day += yyvsp[0].intval; }
    break;

  case 44:
#line 385 "getdate.y"
    { PC.rel_hour += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 45:
#line 387 "getdate.y"
    { PC.rel_hour += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 46:
#line 389 "getdate.y"
    { PC.rel_hour += yyvsp[0].intval; }
    break;

  case 47:
#line 391 "getdate.y"
    { PC.rel_minutes += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 48:
#line 393 "getdate.y"
    { PC.rel_minutes += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 49:
#line 395 "getdate.y"
    { PC.rel_minutes += yyvsp[0].intval; }
    break;

  case 50:
#line 397 "getdate.y"
    { PC.rel_seconds += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 51:
#line 399 "getdate.y"
    { PC.rel_seconds += yyvsp[-1].textintval.value * yyvsp[0].intval; }
    break;

  case 52:
#line 401 "getdate.y"
    { PC.rel_seconds += yyvsp[0].intval; }
    break;

  case 53:
#line 406 "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 = 0;
                PC.meridian = MER24;
              }
          }
      }
    break;

  case 54:
#line 442 "getdate.y"
    { yyval.intval = MER24; }
    break;

  case 55:
#line 444 "getdate.y"
    { yyval.intval = yyvsp[0].intval; }
    break;


    }

/* Line 999 of yacc.c.  */
#line 1600 "getdate.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);
          const char* yyprefix;
          char *yymsg;
          int yyx;

          /* Start YYX at -YYN if negative to avoid negative indexes in
             YYCHECK.  */
          int yyxbegin = yyn < 0 ? -yyn : 0;

          /* Stay within bounds of both yycheck and yytname.  */
          int yychecklim = YYLAST - yyn;
          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
          int yycount = 0;

          yyprefix = ", expecting ";
          for (yyx = yyxbegin; yyx < yyxend; ++yyx)
            if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
              {
                yysize += yystrlen (yyprefix) + yystrlen (yytname [yyx]);
                yycount += 1;
                if (yycount == 5)
                  {
                    yysize = 0;
                    break;
                  }
              }
          yysize += (sizeof ("syntax error, unexpected ")
                     + 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)
                {
                  yyprefix = ", expecting ";
                  for (yyx = yyxbegin; yyx < yyxend; ++yyx)
                    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
                      {
                        yyp = yystpcpy (yyp, yyprefix);
                        yyp = yystpcpy (yyp, yytname[yyx]);
                        yyprefix = " or ";
                      }
                }
              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;
}


#line 447 "getdate.y"


/* Include this file down here because bison inserts code above which
   may define-away `const'.  We want the prototype for get_date to have
   the same signature as the function definition.  */
#include "getdate.h"
//#include "unlocked-io.h"

#ifndef gmtime
struct tm *gmtime ();
#endif
#ifndef localtime
struct tm *localtime ();
#endif
#ifndef mktime
time_t mktime ();
#endif

static table const meridian_table[] =
{
  { "AM",   tMERIDIAN, MERam },
  { "A.M.", tMERIDIAN, MERam },
  { "PM",   tMERIDIAN, MERpm },
  { "P.M.", tMERIDIAN, MERpm },
  { 0, 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 },
  { 0, 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 },
  { 0, 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",     tUNUMBER,       -1 },
  { "THIS",     tUNUMBER,        0 },
  { "NEXT",     tUNUMBER,        1 },
  { "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 },
  { 0, 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 */
  { 0, 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) },
  { 0, 0, 0 }
};



static int
to_hour (int hours, int meridian)
{
  switch (meridian)
    {
    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;
    default:
      abort ();
    }
  /* NOTREACHED */
}

static int
to_year (textint textyear)
{
  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.  */
  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 0;
}

#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 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,
     but it's OK to assume that A and B are close to each other.  */
  int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3);
  int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3);
  int a100 = a4 / 25 - (a4 % 25 < 0);
  int b100 = b4 / 25 - (b4 % 25 < 0);
  int a400 = a100 >> 2;
  int b400 = b100 >> 2;
  int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
  int years = a->tm_year - b->tm_year;
  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;
  int i;
  int abbrev;

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

  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 (i = 0, p = q = word; (*p = *q); q++)
    if (*q == '.')
      i = 1;
    else
      p++;
  if (i && (tp = lookup_zone (pc, word)))
    return tp;

  return 0;
}

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

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

      if (ISDIGIT (c) || c == '-' || c == '+')
        {
          char const *p;
          int sign;
          int value;
          if (c == '-' || c == '+')
            {
              sign = c == '-' ? -1 : 1;
              c = *++pc->input;
              if (! ISDIGIT (c))
                /* skip the '-' sign */
                continue;
            }
          else
            sign = 0;
          p = pc->input;
          value = 0;
          do
            {
              value = 10 * value + c - '0';
              c = *++p;
            }
          while (ISDIGIT (c));
          lvalp->textintval.value = sign < 0 ? -value : value;
          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 (char *s ATTRIBUTE_UNUSED)
{
  return 0;
}

/* Parse a date/time string P.  Return the corresponding time_t value,
   or (time_t) -1 if there is an error.  P can be an incomplete or
   relative time specification; if so, use *NOW as the basis for the
   returned time.  */
time_t
get_date (const char *p, const time_t *now)
{
  time_t Start = now ? *now : time (0);
  struct tm *tmp = localtime (&Start);
  struct tm tm;
  struct tm tm0;
  parser_control pc;

  if (! tmp)
    return -1;

  pc.input = p;
  pc.year.value = tmp->tm_year + 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 = tmp->tm_sec;
  tm.tm_isdst = tmp->tm_isdst;

  pc.meridian = MER24;
  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.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 = 0;

  /* 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 *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 = 0;
              }
            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 = 0;
  }
#else
  pc.local_time_zone_table[0].name = 0;
#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 = 0;
    }

  if (yyparse (&pc) != 0
      || 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))
    return -1;

  tm.tm_year = to_year (pc.year) - TM_YEAR_BASE + pc.rel_year;
  tm.tm_mon = pc.month - 1 + pc.rel_month;
  tm.tm_mday = pc.day + pc.rel_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)
        return -1;
      tm.tm_min = pc.minutes;
      tm.tm_sec = pc.seconds;
    }
  else
    {
      tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
    }

  /* Let mktime deduce tm_isdst if we have an absolute time stamp,
     or if the relative time stamp mentions days, months, or years.  */
  if (pc.dates_seen | pc.days_seen | pc.times_seen | pc.rel_day
      | pc.rel_month | pc.rel_year)
    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 (Start == (time_t) -1)
    {

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

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

  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)
        return Start;
    }

  if (pc.zones_seen)
    {
      int delta = pc.time_zone * 60;
#ifdef HAVE_TM_GMTOFF
      delta -= tm.tm_gmtoff;
#else
      struct tm *gmt = gmtime (&Start);
      if (! gmt)
        return -1;
      delta -= tm_diff (&tm, gmt);
#endif
      if ((Start < Start - delta) != (delta < 0))
        return -1;      /* time_t overflow */
      Start -= delta;
    }

  /* Add relative hours, minutes, and seconds.  Ignore leap seconds;
     i.e. "+ 10 minutes" means 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.  */
  {
    time_t t0 = Start;
    long d1 = 60 * 60 * (long) pc.rel_hour;
    time_t t1 = t0 + d1;
    long d2 = 60 * (long) pc.rel_minutes;
    time_t t2 = t1 + d2;
    int d3 = pc.rel_seconds;
    time_t t3 = t2 + d3;
    if ((d1 / (60 * 60) ^ pc.rel_hour)
        | (d2 / 60 ^ pc.rel_minutes)
        | ((t0 + d1 < t0) ^ (d1 < 0))
        | ((t1 + d2 < t1) ^ (d2 < 0))
        | ((t2 + d3 < t2) ^ (d3 < 0)))
      return -1;
    Start = t3;
  }

  return Start;
}

#if TEST

#include <stdio.h>

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

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

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

---