libtksh/tcl/tclDate.c

	tclDate.c revision 3f54fd611f536639ec30dd53c48e5ec1897cc7d9
/*
 * tclDate.c --
 *
 *  This file is generated from a yacc grammar defined in
 *  the file tclGetDate.y.  It should not be edited directly.
 *
 * Copyright (c) 1992-1995 Karl Lehenbauer and Mark Diekhans.
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * @(#) tclDate.c 1.29 97/01/30 10:50:33
 */

#include "tclInt.h"
#include "tclPort.h"

#ifdef MAC_TCL
#   define EPOCH           1904
#   define START_OF_TIME   1904
#   define END_OF_TIME     2039
#else
#   define EPOCH           1970
#   define START_OF_TIME   1902
#   define END_OF_TIME     2037
#endif

/*
 * The offset of tm_year of struct tm returned by localtime, gmtime, etc.
 * I don't know how universal this is; K&R II, the NetBSD manpages, and
 * ../compat/strftime.c all agree that tm_year is the year-1900.  However,
 * some systems may have a different value.  This #define should be the
 * same as in ../compat/strftime.c.
 */
#define TM_YEAR_BASE 1900

#define HOUR(x)         ((int) (60 * x))
#define SECSPERDAY      (24L * 60L * 60L)


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


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

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


/*
 *  Global variables.  We could get rid of most of these by using a good
 *  union as the yacc stack.  (This routine was originally written before
 *  yacc had the %union construct.)  Maybe someday; right now we only use
 *  the %union very rarely.
 */
static char     *TclDateInput;
static DSTMODE  TclDateDSTmode;
static time_t   TclDateDayOrdinal;
static time_t   TclDateDayNumber;
static int      TclDateHaveDate;
static int      TclDateHaveDay;
static int      TclDateHaveRel;
static int      TclDateHaveTime;
static int      TclDateHaveZone;
static time_t   TclDateTimezone;
static time_t   TclDateDay;
static time_t   TclDateHour;
static time_t   TclDateMinutes;
static time_t   TclDateMonth;
static time_t   TclDateSeconds;
static time_t   TclDateYear;
static MERIDIAN TclDateMeridian;
static time_t   TclDateRelMonth;
static time_t   TclDateRelSeconds;


/*
 * Prototypes of internal functions.
 */
static void
TclDateerror _ANSI_ARGS_((char *s));

static time_t
ToSeconds _ANSI_ARGS_((time_t      Hours,
                       time_t      Minutes,
                       time_t      Seconds,
                       MERIDIAN    Meridian));

static int
Convert _ANSI_ARGS_((time_t      Month,
                     time_t      Day,
                     time_t      Year,
                     time_t      Hours,
                     time_t      Minutes,
                     time_t      Seconds,
                     MERIDIAN    Meridia,
                     DSTMODE     DSTmode,
                     time_t     *TimePtr));

static time_t
DSTcorrect _ANSI_ARGS_((time_t      Start,
                        time_t      Future));

static time_t
RelativeDate _ANSI_ARGS_((time_t      Start,
                          time_t      DayOrdinal,
                          time_t      DayNumber));

static int
RelativeMonth _ANSI_ARGS_((time_t      Start,
                           time_t      RelMonth,
                           time_t     *TimePtr));
static int
LookupWord _ANSI_ARGS_((char  *buff));

static int
TclDatelex _ANSI_ARGS_((void));

int
TclDateparse _ANSI_ARGS_((void));
typedef union
#ifdef __cplusplus
    YYSTYPE
#endif
 {
    time_t              Number;
    enum _MERIDIAN      Meridian;
} YYSTYPE;
# define tAGO 257
# define tDAY 258
# define tDAYZONE 259
# define tID 260
# define tMERIDIAN 261
# define tMINUTE_UNIT 262
# define tMONTH 263
# define tMONTH_UNIT 264
# define tSEC_UNIT 265
# define tSNUMBER 266
# define tUNUMBER 267
# define tZONE 268
# define tEPOCH 269
# define tDST 270


#ifdef __cplusplus

#ifndef TclDateerror
    void TclDateerror(const char *);
#endif

#ifndef TclDatelex
#ifdef __EXTERN_C__
    extern "C" { int TclDatelex(void); }
#else
    int TclDatelex(void);
#endif
#endif
    int TclDateparse(void);

#endif
#define TclDateclearin TclDatechar = -1
#define TclDateerrok TclDateerrflag = 0
extern int TclDatechar;
extern int TclDateerrflag;
YYSTYPE TclDatelval;
YYSTYPE TclDateval;
typedef int TclDatetabelem;
#ifndef YYMAXDEPTH
#define YYMAXDEPTH 150
#endif
#if YYMAXDEPTH > 0
int TclDate_TclDates[YYMAXDEPTH], *TclDates = TclDate_TclDates;
YYSTYPE TclDate_TclDatev[YYMAXDEPTH], *TclDatev = TclDate_TclDatev;
#else   /* user does initial allocation */
int *TclDates;
YYSTYPE *TclDatev;
#endif
static int TclDatemaxdepth = YYMAXDEPTH;
# define YYERRCODE 256


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

/*
 * Time units table.
 */
static TABLE    UnitsTable[] = {
    { "year",           tMONTH_UNIT,    12 },
    { "month",          tMONTH_UNIT,    1 },
    { "fortnight",      tMINUTE_UNIT,   14 * 24 * 60 },
    { "week",           tMINUTE_UNIT,   7 * 24 * 60 },
    { "day",            tMINUTE_UNIT,   1 * 24 * 60 },
    { "hour",           tMINUTE_UNIT,   60 },
    { "minute",         tMINUTE_UNIT,   1 },
    { "min",            tMINUTE_UNIT,   1 },
    { "second",         tSEC_UNIT,      1 },
    { "sec",            tSEC_UNIT,      1 },
    { NULL }
};

/*
 * Assorted relative-time words.
 */
static TABLE    OtherTable[] = {
    { "tomorrow",       tMINUTE_UNIT,   1 * 24 * 60 },
    { "yesterday",      tMINUTE_UNIT,   -1 * 24 * 60 },
    { "today",          tMINUTE_UNIT,   0 },
    { "now",            tMINUTE_UNIT,   0 },
    { "last",           tUNUMBER,       -1 },
    { "this",           tMINUTE_UNIT,   0 },
    { "next",           tUNUMBER,       2 },
#if 0
    { "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 },
#endif
    { "ago",            tAGO,   1 },
    { "epoch",          tEPOCH,   0 },
    { NULL }
};

/*
 * The timezone table.  (Note: This table was modified to not use any floating
 * point constants to work around an SGI compiler bug).
 */
static TABLE    TimezoneTable[] = {
    { "gmt",    tZONE,     HOUR( 0) },      /* Greenwich Mean */
    { "ut",     tZONE,     HOUR( 0) },      /* Universal (Coordinated) */
    { "utc",    tZONE,     HOUR( 0) },
    { "wet",    tZONE,     HOUR( 0) } ,     /* Western European */
    { "bst",    tDAYZONE,  HOUR( 0) },      /* British Summer */
    { "wat",    tZONE,     HOUR( 1) },      /* West Africa */
    { "at",     tZONE,     HOUR( 2) },      /* Azores */
#if     0
    /* For completeness.  BST is also British Summer, and GST is
     * also Guam Standard. */
    { "bst",    tZONE,     HOUR( 3) },      /* Brazil Standard */
    { "gst",    tZONE,     HOUR( 3) },      /* Greenland Standard */
#endif
    { "nft",    tZONE,     HOUR( 7/2) },    /* Newfoundland */
    { "nst",    tZONE,     HOUR( 7/2) },    /* Newfoundland Standard */
    { "ndt",    tDAYZONE,  HOUR( 7/2) },    /* Newfoundland Daylight */
    { "ast",    tZONE,     HOUR( 4) },      /* Atlantic Standard */
    { "adt",    tDAYZONE,  HOUR( 4) },      /* Atlantic Daylight */
    { "est",    tZONE,     HOUR( 5) },      /* Eastern Standard */
    { "edt",    tDAYZONE,  HOUR( 5) },      /* Eastern Daylight */
    { "cst",    tZONE,     HOUR( 6) },      /* Central Standard */
    { "cdt",    tDAYZONE,  HOUR( 6) },      /* Central Daylight */
    { "mst",    tZONE,     HOUR( 7) },      /* Mountain Standard */
    { "mdt",    tDAYZONE,  HOUR( 7) },      /* Mountain Daylight */
    { "pst",    tZONE,     HOUR( 8) },      /* Pacific Standard */
    { "pdt",    tDAYZONE,  HOUR( 8) },      /* Pacific Daylight */
    { "yst",    tZONE,     HOUR( 9) },      /* Yukon Standard */
    { "ydt",    tDAYZONE,  HOUR( 9) },      /* Yukon Daylight */
    { "hst",    tZONE,     HOUR(10) },      /* Hawaii Standard */
    { "hdt",    tDAYZONE,  HOUR(10) },      /* Hawaii Daylight */
    { "cat",    tZONE,     HOUR(10) },      /* Central Alaska */
    { "ahst",   tZONE,     HOUR(10) },      /* Alaska-Hawaii Standard */
    { "nt",     tZONE,     HOUR(11) },      /* Nome */
    { "idlw",   tZONE,     HOUR(12) },      /* International Date Line West */
    { "cet",    tZONE,    -HOUR( 1) },      /* Central European */
    { "met",    tZONE,    -HOUR( 1) },      /* Middle European */
    { "mewt",   tZONE,    -HOUR( 1) },      /* Middle European Winter */
    { "mest",   tDAYZONE, -HOUR( 1) },      /* Middle European Summer */
    { "swt",    tZONE,    -HOUR( 1) },      /* Swedish Winter */
    { "sst",    tDAYZONE, -HOUR( 1) },      /* Swedish Summer */
    { "fwt",    tZONE,    -HOUR( 1) },      /* French Winter */
    { "fst",    tDAYZONE, -HOUR( 1) },      /* French Summer */
    { "eet",    tZONE,    -HOUR( 2) },      /* Eastern Europe, USSR Zone 1 */
    { "bt",     tZONE,    -HOUR( 3) },      /* Baghdad, USSR Zone 2 */
    { "it",     tZONE,    -HOUR( 7/2) },    /* Iran */
    { "zp4",    tZONE,    -HOUR( 4) },      /* USSR Zone 3 */
    { "zp5",    tZONE,    -HOUR( 5) },      /* USSR Zone 4 */
    { "ist",    tZONE,    -HOUR(11/2) },    /* Indian Standard */
    { "zp6",    tZONE,    -HOUR( 6) },      /* USSR Zone 5 */
#if     0
    /* For completeness.  NST is also Newfoundland Stanard, nad SST is
     * also Swedish Summer. */
    { "nst",    tZONE,    -HOUR(13/2) },    /* North Sumatra */
    { "sst",    tZONE,    -HOUR( 7) },      /* South Sumatra, USSR Zone 6 */
#endif  /* 0 */
    { "wast",   tZONE,    -HOUR( 7) },      /* West Australian Standard */
    { "wadt",   tDAYZONE, -HOUR( 7) },      /* West Australian Daylight */
    { "jt",     tZONE,    -HOUR(15/2) },    /* Java (3pm in Cronusland!) */
    { "cct",    tZONE,    -HOUR( 8) },      /* China Coast, USSR Zone 7 */
    { "jst",    tZONE,    -HOUR( 9) },      /* Japan Standard, USSR Zone 8 */
    { "cast",   tZONE,    -HOUR(19/2) },    /* Central Australian Standard */
    { "cadt",   tDAYZONE, -HOUR(19/2) },    /* Central Australian Daylight */
    { "east",   tZONE,    -HOUR(10) },      /* Eastern Australian Standard */
    { "eadt",   tDAYZONE, -HOUR(10) },      /* Eastern Australian Daylight */
    { "gst",    tZONE,    -HOUR(10) },      /* Guam Standard, USSR Zone 9 */
    { "nzt",    tZONE,    -HOUR(12) },      /* New Zealand */
    { "nzst",   tZONE,    -HOUR(12) },      /* New Zealand Standard */
    { "nzdt",   tDAYZONE, -HOUR(12) },      /* New Zealand Daylight */
    { "idle",   tZONE,    -HOUR(12) },      /* International Date Line East */
    /* ADDED BY Marco Nijdam */
    { "dst",    tDST,     HOUR( 0) },       /* DST on (hour is ignored) */
    /* End ADDED */
    {  NULL  }
};

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


/*
 * Dump error messages in the bit bucket.
 */
static void
TclDateerror(s)
    char  *s;
{
}


static time_t
ToSeconds(Hours, Minutes, Seconds, Meridian)
    time_t      Hours;
    time_t      Minutes;
    time_t      Seconds;
    MERIDIAN    Meridian;
{
    if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59)
        return -1;
    switch (Meridian) {
    case MER24:
        if (Hours < 0 || Hours > 23)
            return -1;
        return (Hours * 60L + Minutes) * 60L + Seconds;
    case MERam:
        if (Hours < 1 || Hours > 12)
            return -1;
        return ((Hours % 12) * 60L + Minutes) * 60L + Seconds;
    case MERpm:
        if (Hours < 1 || Hours > 12)
            return -1;
        return (((Hours % 12) + 12) * 60L + Minutes) * 60L + Seconds;
    }
    return -1;  /* Should never be reached */
}


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

    DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0)
                    ? 29 : 28;
    if (Month < 1 || Month > 12
     || Year < START_OF_TIME || Year > END_OF_TIME
     || Day < 1 || Day > DaysInMonth[(int)--Month])
        return -1;

    for (Julian = Day - 1, i = 0; i < Month; i++)
        Julian += DaysInMonth[i];
    if (Year >= EPOCH) {
        for (i = EPOCH; i < Year; i++)
            Julian += 365 + (i % 4 == 0);
    } else {
        for (i = Year; i < EPOCH; i++)
            Julian -= 365 + (i % 4 == 0);
    }
    Julian *= SECSPERDAY;
    Julian += TclDateTimezone * 60L;
    if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
        return -1;
    Julian += tod;
    if (DSTmode == DSTon
     || (DSTmode == DSTmaybe && TclpGetDate(&Julian, 0)->tm_isdst))
        Julian -= 60 * 60;
    *TimePtr = Julian;
    return 0;
}


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

    StartDay = (TclpGetDate(&Start, 0)->tm_hour + 1) % 24;
    FutureDay = (TclpGetDate(&Future, 0)->tm_hour + 1) % 24;
    return (Future - Start) + (StartDay - FutureDay) * 60L * 60L;
}


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

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


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

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


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

    /*
     * Make it lowercase.
     */
    for (p = buff; *p; p++) {
        if (isupper(UCHAR(*p))) {
            *p = (char) tolower(UCHAR(*p));
    }
    }

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

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

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

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

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

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

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

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

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

    return tID;
}


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

    for ( ; ; ) {
        while (isspace((unsigned char) (*TclDateInput))) {
            TclDateInput++;
    }

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

/*
 * Specify zone is of -50000 to force GMT.  (This allows BST to work).
 */

int
TclGetDate(p, now, zone, timePtr)
    char *p;
    unsigned long now;
    long zone;
    unsigned long *timePtr;
{
    struct tm *tm;
    time_t Start;
    time_t Time;
    time_t tod;
    int thisyear;

    TclDateInput = p;
    tm = TclpGetDate((time_t *) &now, 0);
    thisyear = tm->tm_year + TM_YEAR_BASE;
    TclDateYear = thisyear;
    TclDateMonth = tm->tm_mon + 1;
    TclDateDay = tm->tm_mday;
    TclDateTimezone = zone;
    if (zone == -50000) {
        TclDateDSTmode = DSToff;  /* assume GMT */
        TclDateTimezone = 0;
    } else {
        TclDateDSTmode = DSTmaybe;
    }
    TclDateHour = 0;
    TclDateMinutes = 0;
    TclDateSeconds = 0;
    TclDateMeridian = MER24;
    TclDateRelSeconds = 0;
    TclDateRelMonth = 0;
    TclDateHaveDate = 0;
    TclDateHaveDay = 0;
    TclDateHaveRel = 0;
    TclDateHaveTime = 0;
    TclDateHaveZone = 0;

    if (TclDateparse() || TclDateHaveTime > 1 || TclDateHaveZone > 1 || TclDateHaveDate > 1 ||
        TclDateHaveDay > 1) {
        return -1;
    }

    if (TclDateHaveDate || TclDateHaveTime || TclDateHaveDay) {
    if (TclDateYear < 0) {
        TclDateYear = -TclDateYear;
    }
    /*
     * The following line handles years that are specified using
     * only two digits.  The line of code below implements a policy
     * where two digit dates always refer to the hundered years
     * after TM_YEAR_BASE - which is all dates in the 1900's.
     */
    if (TclDateYear < 100) {
        TclDateYear += TM_YEAR_BASE;
    }
    if (Convert(TclDateMonth, TclDateDay, TclDateYear, TclDateHour, TclDateMinutes, TclDateSeconds,
        TclDateMeridian, TclDateDSTmode, &Start) < 0) {
            return -1;
    }
    } else {
        Start = now;
        if (!TclDateHaveRel) {
            Start -= ((tm->tm_hour * 60L) + tm->tm_min * 60L) + tm->tm_sec;
    }
    }

    Start += TclDateRelSeconds;
    if (RelativeMonth(Start, TclDateRelMonth, &Time) < 0) {
        return -1;
    }
    Start += Time;

    if (TclDateHaveDay && !TclDateHaveDate) {
        tod = RelativeDate(Start, TclDateDayOrdinal, TclDateDayNumber);
        Start += tod;
    }

    *timePtr = Start;
    return 0;
}
TclDatetabelem TclDateexca[] ={
-1, 1,
    0, -1,
    -2, 0,
    };
# define YYNPROD 41
# define YYLAST 227
TclDatetabelem TclDateact[]={

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

-10000000,  -258,-10000000,-10000000,-10000000,-10000000,-10000000,-10000000,-10000000,   -45,
  -267,-10000000,  -244,-10000000,   -14,  -231,  -240,-10000000,-10000000,-10000000,
-10000000,  -246,-10000000,  -247,  -248,-10000000,-10000000,-10000000,-10000000,   -15,
-10000000,-10000000,-10000000,-10000000,-10000000,   -40,   -20,-10000000,  -251,-10000000,
-10000000,  -252,-10000000,  -253,-10000000,  -249,-10000000,-10000000,-10000000 };
TclDatetabelem TclDatepgo[]={

     0,    28,    39,    38,    37,    36,    35,    34,    33,    32,
    31 };
TclDatetabelem TclDater1[]={

     0,     2,     2,     3,     3,     3,     3,     3,     3,     4,
     4,     4,     4,     4,     5,     5,     5,     7,     7,     7,
     6,     6,     6,     6,     6,     6,     6,     8,     8,    10,
    10,    10,    10,    10,    10,    10,    10,    10,     9,     1,
     1 };
TclDatetabelem TclDater2[]={

     0,     0,     4,     3,     3,     3,     3,     3,     2,     5,
     9,     9,    13,    13,     5,     3,     3,     3,     5,     5,
     7,    11,     5,     9,     5,     3,     7,     5,     2,     5,
     5,     3,     5,     5,     3,     5,     5,     3,     3,     1,
     3 };
TclDatetabelem TclDatechk[]={

-10000000,    -2,    -3,    -4,    -5,    -6,    -7,    -8,    -9,   267,
   268,   259,   263,   269,   258,   -10,   266,   262,   265,   264,
   261,    58,   258,    47,   263,   262,   265,   264,   270,   267,
    44,   257,   262,   265,   264,   267,   267,   267,    44,    -1,
   266,    58,   261,    47,   267,   267,   267,    -1,   266 };
TclDatetabelem TclDatedef[]={

     1,    -2,     2,     3,     4,     5,     6,     7,     8,    38,
    15,    16,     0,    25,    17,    28,     0,    31,    34,    37,
     9,     0,    19,     0,    24,    29,    33,    36,    14,    22,
    18,    27,    30,    32,    35,    39,    20,    26,     0,    10,
    11,     0,    40,     0,    23,    39,    21,    12,    13 };
typedef struct
#ifdef __cplusplus
    TclDatetoktype
#endif
{ char *t_name; int t_val; } TclDatetoktype;
#ifndef YYDEBUG
#   define YYDEBUG  0   /* don't allow debugging */
#endif

#if YYDEBUG

TclDatetoktype TclDatetoks[] =
{
    "tAGO", 257,
    "tDAY", 258,
    "tDAYZONE", 259,
    "tID",  260,
    "tMERIDIAN",    261,
    "tMINUTE_UNIT", 262,
    "tMONTH",   263,
    "tMONTH_UNIT",  264,
    "tSEC_UNIT",    265,
    "tSNUMBER", 266,
    "tUNUMBER", 267,
    "tZONE",    268,
    "tEPOCH",   269,
    "tDST", 270,
    "-unknown-",    -1  /* ends search */
};

char * TclDatereds[] =
{
    "-no such reduction-",
    "spec : /* empty */",
    "spec : spec item",
    "item : time",
    "item : zone",
    "item : date",
    "item : day",
    "item : rel",
    "item : number",
    "time : tUNUMBER tMERIDIAN",
    "time : tUNUMBER ':' tUNUMBER o_merid",
    "time : tUNUMBER ':' tUNUMBER tSNUMBER",
    "time : tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid",
    "time : tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER",
    "zone : tZONE tDST",
    "zone : tZONE",
    "zone : tDAYZONE",
    "day : tDAY",
    "day : tDAY ','",
    "day : tUNUMBER tDAY",
    "date : tUNUMBER '/' tUNUMBER",
    "date : tUNUMBER '/' tUNUMBER '/' tUNUMBER",
    "date : tMONTH tUNUMBER",
    "date : tMONTH tUNUMBER ',' tUNUMBER",
    "date : tUNUMBER tMONTH",
    "date : tEPOCH",
    "date : tUNUMBER tMONTH tUNUMBER",
    "rel : relunit tAGO",
    "rel : relunit",
    "relunit : tUNUMBER tMINUTE_UNIT",
    "relunit : tSNUMBER tMINUTE_UNIT",
    "relunit : tMINUTE_UNIT",
    "relunit : tSNUMBER tSEC_UNIT",
    "relunit : tUNUMBER tSEC_UNIT",
    "relunit : tSEC_UNIT",
    "relunit : tSNUMBER tMONTH_UNIT",
    "relunit : tUNUMBER tMONTH_UNIT",
    "relunit : tMONTH_UNIT",
    "number : tUNUMBER",
    "o_merid : /* empty */",
    "o_merid : tMERIDIAN",
};
#endif /* YYDEBUG */
/*
 * Copyright (c) 1993 by Sun Microsystems, Inc.
 */


/*
** Skeleton parser driver for yacc output
*/

/*
** yacc user known macros and defines
*/
#define YYERROR     goto TclDateerrlab
#define YYACCEPT    return(0)
#define YYABORT     return(1)
#define YYBACKUP( newtoken, newvalue )\
{\
    if ( TclDatechar >= 0 || ( TclDater2[ TclDatetmp ] >> 1 ) != 1 )\
    {\
        TclDateerror( "syntax error - cannot backup" );\
        goto TclDateerrlab;\
    }\
    TclDatechar = newtoken;\
    TclDatestate = *TclDateps;\
    TclDatelval = newvalue;\
    goto TclDatenewstate;\
}
#define YYRECOVERING()  (!!TclDateerrflag)
#define YYNEW(type) malloc(sizeof(type) * TclDatenewmax)
#define YYCOPY(to, from, type) \
    (type *) memcpy(to, (char *) from, TclDatenewmax * sizeof(type))
#define YYENLARGE( from, type) \
    (type *) realloc((char *) from, TclDatenewmax * sizeof(type))
#ifndef YYDEBUG
#   define YYDEBUG  1   /* make debugging available */
#endif

/*
** user known globals
*/
int TclDatedebug;           /* set to 1 to get debugging */

/*
** driver internal defines
*/
#define YYFLAG      (-10000000)

/*
** global variables used by the parser
*/
YYSTYPE *TclDatepv;         /* top of value stack */
int *TclDateps;         /* top of state stack */

int TclDatestate;           /* current state */
int TclDatetmp;         /* extra var (lasts between blocks) */

int TclDatenerrs;           /* number of errors */
int TclDateerrflag;         /* error recovery flag */
int TclDatechar;            /* current input token number */


#ifdef YYNMBCHARS
#define YYLEX()     TclDatecvtok(TclDatelex())
/*
** TclDatecvtok - return a token if i is a wchar_t value that exceeds 255.
**  If i<255, i itself is the token.  If i>255 but the neither
**  of the 30th or 31st bit is on, i is already a token.
*/
#if defined(__STDC__) || defined(__cplusplus)
int TclDatecvtok(int i)
#else
int TclDatecvtok(i) int i;
#endif
{
    int first = 0;
    int last = YYNMBCHARS - 1;
    int mid;
    wchar_t j;

    if(i&0x60000000){/*Must convert to a token. */
        if( TclDatembchars[last].character < i ){
            return i;/*Giving up*/
        }
        while ((last>=first)&&(first>=0)) {/*Binary search loop*/
            mid = (first+last)/2;
            j = TclDatembchars[mid].character;
            if( j==i ){/*Found*/
                return TclDatembchars[mid].tvalue;
            }else if( j<i ){
                first = mid + 1;
            }else{
                last = mid -1;
            }
        }
        /*No entry in the table.*/
        return i;/* Giving up.*/
    }else{/* i is already a token. */
        return i;
    }
}
#else/*!YYNMBCHARS*/
#define YYLEX()     TclDatelex()
#endif/*!YYNMBCHARS*/

/*
** TclDateparse - return 0 if worked, 1 if syntax error not recovered from
*/
#if defined(__STDC__) || defined(__cplusplus)
int TclDateparse(void)
#else
int TclDateparse()
#endif
{
    register YYSTYPE *TclDatepvt;   /* top of value stack for $vars */

#if defined(__cplusplus) || defined(lint)
/*
    hacks to please C++ and lint - goto's inside switch should never be
    executed; TclDatepvt is set to 0 to avoid "used before set" warning.
*/
    static int __yaccpar_lint_hack__ = 0;
    switch (__yaccpar_lint_hack__)
    {
        case 1: goto TclDateerrlab;
        case 2: goto TclDatenewstate;
    }
    TclDatepvt = 0;
#endif

    /*
    ** Initialize externals - TclDateparse may be called more than once
    */
    TclDatepv = &TclDatev[-1];
    TclDateps = &TclDates[-1];
    TclDatestate = 0;
    TclDatetmp = 0;
    TclDatenerrs = 0;
    TclDateerrflag = 0;
    TclDatechar = -1;

#if YYMAXDEPTH <= 0
    if (TclDatemaxdepth <= 0)
    {
        if ((TclDatemaxdepth = YYEXPAND(0)) <= 0)
        {
            TclDateerror("yacc initialization error");
            YYABORT;
        }
    }
#endif

    {
        register YYSTYPE *TclDate_pv;   /* top of value stack */
        register int *TclDate_ps;       /* top of state stack */
        register int TclDate_state;     /* current state */
        register int  TclDate_n;        /* internal state number info */
    goto TclDatestack;  /* moved from 6 lines above to here to please C++ */

        /*
        ** get globals into registers.
        ** branch to here only if YYBACKUP was called.
        */
        TclDate_pv = TclDatepv;
        TclDate_ps = TclDateps;
        TclDate_state = TclDatestate;
        goto TclDate_newstate;

        /*
        ** get globals into registers.
        ** either we just started, or we just finished a reduction
        */
    TclDatestack:
        TclDate_pv = TclDatepv;
        TclDate_ps = TclDateps;
        TclDate_state = TclDatestate;

        /*
        ** top of for (;;) loop while no reductions done
        */
    TclDate_stack:
        /*
        ** put a state and value onto the stacks
        */
#if YYDEBUG
        /*
        ** if debugging, look up token value in list of value vs.
        ** name pairs.  0 and negative (-1) are special values.
        ** Note: linear search is used since time is not a real
        ** consideration while debugging.
        */
        if ( TclDatedebug )
        {
            register int TclDate_i;

            printf( "State %d, token ", TclDate_state );
            if ( TclDatechar == 0 )
                printf( "end-of-file\n" );
            else if ( TclDatechar < 0 )
                printf( "-none-\n" );
            else
            {
                for ( TclDate_i = 0; TclDatetoks[TclDate_i].t_val >= 0;
                    TclDate_i++ )
                {
                    if ( TclDatetoks[TclDate_i].t_val == TclDatechar )
                        break;
                }
                printf( "%s\n", TclDatetoks[TclDate_i].t_name );
            }
        }
#endif /* YYDEBUG */
        if ( ++TclDate_ps >= &TclDates[ TclDatemaxdepth ] ) /* room on stack? */
        {
            /*
            ** reallocate and recover.  Note that pointers
            ** have to be reset, or bad things will happen
            */
            int TclDateps_index = (TclDate_ps - TclDates);
            int TclDatepv_index = (TclDate_pv - TclDatev);
            int TclDatepvt_index = (TclDatepvt - TclDatev);
            int TclDatenewmax;
#ifdef YYEXPAND
            TclDatenewmax = YYEXPAND(TclDatemaxdepth);
#else
            TclDatenewmax = 2 * TclDatemaxdepth;    /* double table size */
            if (TclDatemaxdepth == YYMAXDEPTH)  /* first time growth */
            {
                char *newTclDates = (char *)YYNEW(int);
                char *newTclDatev = (char *)YYNEW(YYSTYPE);
                if (newTclDates != 0 && newTclDatev != 0)
                {
                    TclDates = YYCOPY(newTclDates, TclDates, int);
                    TclDatev = YYCOPY(newTclDatev, TclDatev, YYSTYPE);
                }
                else
                    TclDatenewmax = 0;  /* failed */
            }
            else                /* not first time */
            {
                TclDates = YYENLARGE(TclDates, int);
                TclDatev = YYENLARGE(TclDatev, YYSTYPE);
                if (TclDates == 0 || TclDatev == 0)
                    TclDatenewmax = 0;  /* failed */
            }
#endif
            if (TclDatenewmax <= TclDatemaxdepth)   /* tables not expanded */
            {
                TclDateerror( "yacc stack overflow" );
                YYABORT;
            }
            TclDatemaxdepth = TclDatenewmax;

            TclDate_ps = TclDates + TclDateps_index;
            TclDate_pv = TclDatev + TclDatepv_index;
            TclDatepvt = TclDatev + TclDatepvt_index;
        }
        *TclDate_ps = TclDate_state;
        *++TclDate_pv = TclDateval;

        /*
        ** we have a new state - find out what to do
        */
    TclDate_newstate:
        if ( ( TclDate_n = TclDatepact[ TclDate_state ] ) <= YYFLAG )
            goto TclDatedefault;        /* simple state */
#if YYDEBUG
        /*
        ** if debugging, need to mark whether new token grabbed
        */
        TclDatetmp = TclDatechar < 0;
#endif
        if ( ( TclDatechar < 0 ) && ( ( TclDatechar = YYLEX() ) < 0 ) )
            TclDatechar = 0;        /* reached EOF */
#if YYDEBUG
        if ( TclDatedebug && TclDatetmp )
        {
            register int TclDate_i;

            printf( "Received token " );
            if ( TclDatechar == 0 )
                printf( "end-of-file\n" );
            else if ( TclDatechar < 0 )
                printf( "-none-\n" );
            else
            {
                for ( TclDate_i = 0; TclDatetoks[TclDate_i].t_val >= 0;
                    TclDate_i++ )
                {
                    if ( TclDatetoks[TclDate_i].t_val == TclDatechar )
                        break;
                }
                printf( "%s\n", TclDatetoks[TclDate_i].t_name );
            }
        }
#endif /* YYDEBUG */
        if ( ( ( TclDate_n += TclDatechar ) < 0 ) || ( TclDate_n >= YYLAST ) )
            goto TclDatedefault;
        if ( TclDatechk[ TclDate_n = TclDateact[ TclDate_n ] ] == TclDatechar ) /*valid shift*/
        {
            TclDatechar = -1;
            TclDateval = TclDatelval;
            TclDate_state = TclDate_n;
            if ( TclDateerrflag > 0 )
                TclDateerrflag--;
            goto TclDate_stack;
        }

    TclDatedefault:
        if ( ( TclDate_n = TclDatedef[ TclDate_state ] ) == -2 )
        {
#if YYDEBUG
            TclDatetmp = TclDatechar < 0;
#endif
            if ( ( TclDatechar < 0 ) && ( ( TclDatechar = YYLEX() ) < 0 ) )
                TclDatechar = 0;        /* reached EOF */
#if YYDEBUG
            if ( TclDatedebug && TclDatetmp )
            {
                register int TclDate_i;

                printf( "Received token " );
                if ( TclDatechar == 0 )
                    printf( "end-of-file\n" );
                else if ( TclDatechar < 0 )
                    printf( "-none-\n" );
                else
                {
                    for ( TclDate_i = 0;
                        TclDatetoks[TclDate_i].t_val >= 0;
                        TclDate_i++ )
                    {
                        if ( TclDatetoks[TclDate_i].t_val
                            == TclDatechar )
                        {
                            break;
                        }
                    }
                    printf( "%s\n", TclDatetoks[TclDate_i].t_name );
                }
            }
#endif /* YYDEBUG */
            /*
            ** look through exception table
            */
            {
                register int *TclDatexi = TclDateexca;

                while ( ( *TclDatexi != -1 ) ||
                    ( TclDatexi[1] != TclDate_state ) )
                {
                    TclDatexi += 2;
                }
                while ( ( *(TclDatexi += 2) >= 0 ) &&
                    ( *TclDatexi != TclDatechar ) )
                    ;
                if ( ( TclDate_n = TclDatexi[1] ) < 0 )
                    YYACCEPT;
            }
        }

        /*
        ** check for syntax error
        */
        if ( TclDate_n == 0 )   /* have an error */
        {
            /* no worry about speed here! */
            switch ( TclDateerrflag )
            {
            case 0:     /* new error */
                TclDateerror( "syntax error" );
                goto skip_init;
                /*
                ** get globals into registers.
                ** we have a user generated syntax type error
                */
                TclDate_pv = TclDatepv;
                TclDate_ps = TclDateps;
                TclDate_state = TclDatestate;
            skip_init:
                TclDatenerrs++;
                /* FALLTHRU */
            case 1:
            case 2:     /* incompletely recovered error */
                    /* try again... */
                TclDateerrflag = 3;
                /*
                ** find state where "error" is a legal
                ** shift action
                */
                while ( TclDate_ps >= TclDates )
                {
                    TclDate_n = TclDatepact[ *TclDate_ps ] + YYERRCODE;
                    if ( TclDate_n >= 0 && TclDate_n < YYLAST &&
                        TclDatechk[TclDateact[TclDate_n]] == YYERRCODE)                 {
                        /*
                        ** simulate shift of "error"
                        */
                        TclDate_state = TclDateact[ TclDate_n ];
                        goto TclDate_stack;
                    }
                    /*
                    ** current state has no shift on
                    ** "error", pop stack
                    */
#if YYDEBUG
#   define _POP_ "Error recovery pops state %d, uncovers state %d\n"
                    if ( TclDatedebug )
                        printf( _POP_, *TclDate_ps,
                            TclDate_ps[-1] );
#   undef _POP_
#endif
                    TclDate_ps--;
                    TclDate_pv--;
                }
                /*
                ** there is no state on stack with "error" as
                ** a valid shift.  give up.
                */
                YYABORT;
            case 3:     /* no shift yet; eat a token */
#if YYDEBUG
                /*
                ** if debugging, look up token in list of
                ** pairs.  0 and negative shouldn't occur,
                ** but since timing doesn't matter when
                ** debugging, it doesn't hurt to leave the
                ** tests here.
                */
                if ( TclDatedebug )
                {
                    register int TclDate_i;

                    printf( "Error recovery discards " );
                    if ( TclDatechar == 0 )
                        printf( "token end-of-file\n" );
                    else if ( TclDatechar < 0 )
                        printf( "token -none-\n" );
                    else
                    {
                        for ( TclDate_i = 0;
                            TclDatetoks[TclDate_i].t_val >= 0;
                            TclDate_i++ )
                        {
                            if ( TclDatetoks[TclDate_i].t_val
                                == TclDatechar )
                            {
                                break;
                            }
                        }
                        printf( "token %s\n",
                            TclDatetoks[TclDate_i].t_name );
                    }
                }
#endif /* YYDEBUG */
                if ( TclDatechar == 0 ) /* reached EOF. quit */
                    YYABORT;
                TclDatechar = -1;
                goto TclDate_newstate;
            }
        }/* end if ( TclDate_n == 0 ) */
        /*
        ** reduction by production TclDate_n
        ** put stack tops, etc. so things right after switch
        */
#if YYDEBUG
        /*
        ** if debugging, print the string that is the user's
        ** specification of the reduction which is just about
        ** to be done.
        */
        if ( TclDatedebug )
            printf( "Reduce by (%d) \"%s\"\n",
                TclDate_n, TclDatereds[ TclDate_n ] );
#endif
        TclDatetmp = TclDate_n;         /* value to switch over */
        TclDatepvt = TclDate_pv;            /* $vars top of value stack */
        /*
        ** Look in goto table for next state
        ** Sorry about using TclDate_state here as temporary
        ** register variable, but why not, if it works...
        ** If TclDater2[ TclDate_n ] doesn't have the low order bit
        ** set, then there is no action to be done for
        ** this reduction.  So, no saving & unsaving of
        ** registers done.  The only difference between the
        ** code just after the if and the body of the if is
        ** the goto TclDate_stack in the body.  This way the test
        ** can be made before the choice of what to do is needed.
        */
        {
            /* length of production doubled with extra bit */
            register int TclDate_len = TclDater2[ TclDate_n ];

            if ( !( TclDate_len & 01 ) )
            {
                TclDate_len >>= 1;
                TclDateval = ( TclDate_pv -= TclDate_len )[1];  /* $$ = $1 */
                TclDate_state = TclDatepgo[ TclDate_n = TclDater1[ TclDate_n ] ] +
                    *( TclDate_ps -= TclDate_len ) + 1;
                if ( TclDate_state >= YYLAST ||
                    TclDatechk[ TclDate_state =
                    TclDateact[ TclDate_state ] ] != -TclDate_n )
                {
                    TclDate_state = TclDateact[ TclDatepgo[ TclDate_n ] ];
                }
                goto TclDate_stack;
            }
            TclDate_len >>= 1;
            TclDateval = ( TclDate_pv -= TclDate_len )[1];  /* $$ = $1 */
            TclDate_state = TclDatepgo[ TclDate_n = TclDater1[ TclDate_n ] ] +
                *( TclDate_ps -= TclDate_len ) + 1;
            if ( TclDate_state >= YYLAST ||
                TclDatechk[ TclDate_state = TclDateact[ TclDate_state ] ] != -TclDate_n )
            {
                TclDate_state = TclDateact[ TclDatepgo[ TclDate_n ] ];
            }
        }
                    /* save until reenter driver code */
        TclDatestate = TclDate_state;
        TclDateps = TclDate_ps;
        TclDatepv = TclDate_pv;
    }
    /*
    ** code supplied by user is placed in this switch
    */
    switch( TclDatetmp )
    {

case 3:{
            TclDateHaveTime++;
        } break;
case 4:{
            TclDateHaveZone++;
        } break;
case 5:{
            TclDateHaveDate++;
        } break;
case 6:{
            TclDateHaveDay++;
        } break;
case 7:{
            TclDateHaveRel++;
        } break;
case 9:{
            TclDateHour = TclDatepvt[-1].Number;
            TclDateMinutes = 0;
            TclDateSeconds = 0;
            TclDateMeridian = TclDatepvt[-0].Meridian;
        } break;
case 10:{
            TclDateHour = TclDatepvt[-3].Number;
            TclDateMinutes = TclDatepvt[-1].Number;
            TclDateSeconds = 0;
            TclDateMeridian = TclDatepvt[-0].Meridian;
        } break;
case 11:{
            TclDateHour = TclDatepvt[-3].Number;
            TclDateMinutes = TclDatepvt[-1].Number;
            TclDateMeridian = MER24;
            TclDateDSTmode = DSToff;
            TclDateTimezone = - (TclDatepvt[-0].Number % 100 + (TclDatepvt[-0].Number / 100) * 60);
        } break;
case 12:{
            TclDateHour = TclDatepvt[-5].Number;
            TclDateMinutes = TclDatepvt[-3].Number;
            TclDateSeconds = TclDatepvt[-1].Number;
            TclDateMeridian = TclDatepvt[-0].Meridian;
        } break;
case 13:{
            TclDateHour = TclDatepvt[-5].Number;
            TclDateMinutes = TclDatepvt[-3].Number;
            TclDateSeconds = TclDatepvt[-1].Number;
            TclDateMeridian = MER24;
            TclDateDSTmode = DSToff;
            TclDateTimezone = - (TclDatepvt[-0].Number % 100 + (TclDatepvt[-0].Number / 100) * 60);
        } break;
case 14:{
            TclDateTimezone = TclDatepvt[-1].Number;
            TclDateDSTmode = DSTon;
        } break;
case 15:{
            TclDateTimezone = TclDatepvt[-0].Number;
            TclDateDSTmode = DSToff;
        } break;
case 16:{
            TclDateTimezone = TclDatepvt[-0].Number;
            TclDateDSTmode = DSTon;
        } break;
case 17:{
            TclDateDayOrdinal = 1;
            TclDateDayNumber = TclDatepvt[-0].Number;
        } break;
case 18:{
            TclDateDayOrdinal = 1;
            TclDateDayNumber = TclDatepvt[-1].Number;
        } break;
case 19:{
            TclDateDayOrdinal = TclDatepvt[-1].Number;
            TclDateDayNumber = TclDatepvt[-0].Number;
        } break;
case 20:{
            TclDateMonth = TclDatepvt[-2].Number;
            TclDateDay = TclDatepvt[-0].Number;
        } break;
case 21:{
            TclDateMonth = TclDatepvt[-4].Number;
            TclDateDay = TclDatepvt[-2].Number;
            TclDateYear = TclDatepvt[-0].Number;
        } break;
case 22:{
            TclDateMonth = TclDatepvt[-1].Number;
            TclDateDay = TclDatepvt[-0].Number;
        } break;
case 23:{
            TclDateMonth = TclDatepvt[-3].Number;
            TclDateDay = TclDatepvt[-2].Number;
            TclDateYear = TclDatepvt[-0].Number;
        } break;
case 24:{
            TclDateMonth = TclDatepvt[-0].Number;
            TclDateDay = TclDatepvt[-1].Number;
        } break;
case 25:{
                TclDateMonth = 1;
                TclDateDay = 1;
                TclDateYear = EPOCH;
          } break;
case 26:{
            TclDateMonth = TclDatepvt[-1].Number;
            TclDateDay = TclDatepvt[-2].Number;
            TclDateYear = TclDatepvt[-0].Number;
        } break;
case 27:{
            TclDateRelSeconds = -TclDateRelSeconds;
            TclDateRelMonth = -TclDateRelMonth;
        } break;
case 29:{
            TclDateRelSeconds += TclDatepvt[-1].Number * TclDatepvt[-0].Number * 60L;
        } break;
case 30:{
            TclDateRelSeconds += TclDatepvt[-1].Number * TclDatepvt[-0].Number * 60L;
        } break;
case 31:{
            TclDateRelSeconds += TclDatepvt[-0].Number * 60L;
        } break;
case 32:{
            TclDateRelSeconds += TclDatepvt[-1].Number;
        } break;
case 33:{
            TclDateRelSeconds += TclDatepvt[-1].Number;
        } break;
case 34:{
            TclDateRelSeconds++;
        } break;
case 35:{
            TclDateRelMonth += TclDatepvt[-1].Number * TclDatepvt[-0].Number;
        } break;
case 36:{
            TclDateRelMonth += TclDatepvt[-1].Number * TclDatepvt[-0].Number;
        } break;
case 37:{
            TclDateRelMonth += TclDatepvt[-0].Number;
        } break;
case 38:{
    if (TclDateHaveTime && TclDateHaveDate && !TclDateHaveRel) {
        TclDateYear = TclDatepvt[-0].Number;
    } else {
        TclDateHaveTime++;
        if (TclDatepvt[-0].Number < 100) {
        TclDateHour = 0;
        TclDateMinutes = TclDatepvt[-0].Number;
        } else {
        TclDateHour = TclDatepvt[-0].Number / 100;
        TclDateMinutes = TclDatepvt[-0].Number % 100;
        }
        TclDateSeconds = 0;
        TclDateMeridian = MER24;
    }
    } break;
case 39:{
            TclDateval.Meridian = MER24;
        } break;
case 40:{
            TclDateval.Meridian = TclDatepvt[-0].Meridian;
        } break;
    }
    goto TclDatestack;      /* reset registers in driver code */
}