tcldate.c

linux系统下的音频通信

/* 
 * 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 1.32 97/02/03 14:54:37
 */

#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;