src/msw/wince/time.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/msw/wince/time.cpp
// Purpose:     Implements missing time functionality for WinCE
// Author:      Marco Cavallini (MCK) - wx@koansoftware.com
// Modified by:
// Created:     31-08-2003
// RCS-ID:
// Copyright:   (c) Marco Cavallini
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ===========================================================================
// declarations
// ===========================================================================

// ---------------------------------------------------------------------------
// headers
// ---------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/msw/wrapwin.h"
#endif

#include "wx/msw/wince/time.h"

/////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                         //
//                             strftime() - taken from OpenBSD                             //
//                                                                                         //
/////////////////////////////////////////////////////////////////////////////////////////////

#define IN_NONE	0
#define IN_SOME	1
#define IN_THIS	2
#define IN_ALL	3
#define CHAR_BIT      8

#define TYPE_BIT(type)	(sizeof (type) * CHAR_BIT)
#define TYPE_SIGNED(type) (((type) -1) < 0)

#define INT_STRLEN_MAXIMUM(type) \
    ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))

#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))

#define MONSPERYEAR	12
#define DAYSPERWEEK	7
#define TM_YEAR_BASE	1900
#define HOURSPERDAY	24
#define DAYSPERNYEAR	365
#define DAYSPERLYEAR	366

static char		wildabbr[] = "WILDABBR";

char *			tzname[2] = {
	wildabbr,
	wildabbr
};


#define Locale	(&C_time_locale)

struct lc_time_T {
	const char *	mon[MONSPERYEAR];
	const char *	month[MONSPERYEAR];
	const char *	wday[DAYSPERWEEK];
	const char *	weekday[DAYSPERWEEK];
	const char *	X_fmt;
	const char *	x_fmt;
	const char *	c_fmt;
	const char *	am;
	const char *	pm;
	const char *	date_fmt;
};

static const struct lc_time_T	C_time_locale = {
	{
		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	}, {
		"January", "February", "March", "April", "May", "June",
		"July", "August", "September", "October", "November", "December"
	}, {
		"Sun", "Mon", "Tue", "Wed",
		"Thu", "Fri", "Sat"
	}, {
		"Sunday", "Monday", "Tuesday", "Wednesday",
		"Thursday", "Friday", "Saturday"
	},

	/* X_fmt */
	"%H:%M:%S",

	/*
	** x_fmt
	** C99 requires this format.
	** Using just numbers (as here) makes Quakers happier;
	** it's also compatible with SVR4.
	*/
	"%m/%d/%y",

	/*
	** c_fmt
	** C99 requires this format.
	** Previously this code used "%D %X", but we now conform to C99.
	** Note that
	**      "%a %b %d %H:%M:%S %Y"
	** is used by Solaris 2.3.
	*/
	"%a %b %e %T %Y",

	/* am */
	"AM",

	/* pm */
	"PM",

	/* date_fmt */
	"%a %b %e %H:%M:%S %Z %Y"
};


static char *
_add(const char * str, char * pt, const char * const ptlim)
{
	while (pt < ptlim && (*pt = *str++) != '\0')
		++pt;
	return pt;
}


static char *
_conv(const int n, const char * const format, char * const pt, const char * const ptlim)
{
	char	buf[INT_STRLEN_MAXIMUM(int) + 1];

	(void) _snprintf(buf, sizeof buf, format, n);
	return _add(buf, pt, ptlim);
}


static char *
_fmt(const char * format, const struct tm * const t, char * pt, const char * const ptlim, int * warnp)
{
	for ( ; *format; ++format) {
		if (*format == '%') {
label:
			switch (*++format) {
			case '\0':
				--format;
				break;
			case 'A':
				pt = _add((t->tm_wday < 0 ||
					t->tm_wday >= DAYSPERWEEK) ?
					"?" : Locale->weekday[t->tm_wday],
					pt, ptlim);
				continue;
			case 'a':
				pt = _add((t->tm_wday < 0 ||
					t->tm_wday >= DAYSPERWEEK) ?
					"?" : Locale->wday[t->tm_wday],
					pt, ptlim);
				continue;
			case 'B':
				pt = _add((t->tm_mon < 0 ||
					t->tm_mon >= MONSPERYEAR) ?
					"?" : Locale->month[t->tm_mon],
					pt, ptlim);
				continue;
			case 'b':
			case 'h':
				pt = _add((t->tm_mon < 0 ||
					t->tm_mon >= MONSPERYEAR) ?
					"?" : Locale->mon[t->tm_mon],
					pt, ptlim);
				continue;
			case 'C':
				/*
				** %C used to do a...
				**	_fmt("%a %b %e %X %Y", t);
				** ...whereas now POSIX 1003.2 calls for
				** something completely different.
				** (ado, 1993-05-24)
				*/
				pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
					"%02d", pt, ptlim);
				continue;
			case 'c':
				{
				int warn2 = IN_SOME;

				pt = _fmt(Locale->c_fmt, t, pt, ptlim, warnp);
				if (warn2 == IN_ALL)
					warn2 = IN_THIS;
				if (warn2 > *warnp)
					*warnp = warn2;
				}
				continue;
			case 'D':
				pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp);
				continue;
			case 'd':
				pt = _conv(t->tm_mday, "%02d", pt, ptlim);
				continue;
			case 'E':
			case 'O':
				/*
				** C99 locale modifiers.
				** The sequences
				**	%Ec %EC %Ex %EX %Ey %EY
				**	%Od %oe %OH %OI %Om %OM
				**	%OS %Ou %OU %OV %Ow %OW %Oy
				** are supposed to provide alternate
				** representations.
				*/
				goto label;
			case 'e':
				pt = _conv(t->tm_mday, "%2d", pt, ptlim);
				continue;
			case 'F':
				pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
				continue;
			case 'H':
				pt = _conv(t->tm_hour, "%02d", pt, ptlim);
				continue;
			case 'I':
				pt = _conv((t->tm_hour % 12) ?
					(t->tm_hour % 12) : 12,
					"%02d", pt, ptlim);
				continue;
			case 'j':
				pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim);
				continue;
			case 'k':
				/*
				** This used to be...
				**	_conv(t->tm_hour % 12 ?
				**		t->tm_hour % 12 : 12, 2, ' ');
				** ...and has been changed to the below to
				** match SunOS 4.1.1 and Arnold Robbins'
				** strftime version 3.0.  That is, "%k" and
				** "%l" have been swapped.
				** (ado, 1993-05-24)
				*/
				pt = _conv(t->tm_hour, "%2d", pt, ptlim);
				continue;
#ifdef KITCHEN_SINK
			case 'K':
				/*
				** After all this time, still unclaimed!
				*/
				pt = _add("kitchen sink", pt, ptlim);
				continue;
#endif /* defined KITCHEN_SINK */
			case 'l':
				/*
				** This used to be...
				**	_conv(t->tm_hour, 2, ' ');
				** ...and has been changed to the below to
				** match SunOS 4.1.1 and Arnold Robbin's
				** strftime version 3.0.  That is, "%k" and
				** "%l" have been swapped.
				** (ado, 1993-05-24)
				*/
				pt = _conv((t->tm_hour % 12) ?
					(t->tm_hour % 12) : 12,
					"%2d", pt, ptlim);
				continue;
			case 'M':
				pt = _conv(t->tm_min, "%02d", pt, ptlim);
				continue;
			case 'm':
				pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
				continue;
			case 'n':
				pt = _add("\n", pt, ptlim);
				continue;
			case 'p':
				pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
					Locale->pm :
					Locale->am,
					pt, ptlim);
				continue;
			case 'R':
				pt = _fmt("%H:%M", t, pt, ptlim, warnp);
				continue;
			case 'r':
				pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp);
				continue;
			case 'S':
				pt = _conv(t->tm_sec, "%02d", pt, ptlim);
				continue;
			case 's':
				{
					struct tm	tm;
					char		buf[INT_STRLEN_MAXIMUM(
								time_t) + 1];
					time_t		mkt;

					tm = *t;
					mkt = mktime(&tm);
					if (TYPE_SIGNED(time_t))
						(void) _snprintf(buf, sizeof buf,
						    "%ld", (long) mkt);
					else	(void) _snprintf(buf, sizeof buf,
						    "%lu", (unsigned long) mkt);
					pt = _add(buf, pt, ptlim);
				}
				continue;
			case 'T':
				pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
				continue;
			case 't':
				pt = _add("\t", pt, ptlim);
				continue;
			case 'U':
				pt = _conv((t->tm_yday + DAYSPERWEEK -
					t->tm_wday) / DAYSPERWEEK,
					"%02d", pt, ptlim);
				continue;
			case 'u':
				/*
				** From Arnold Robbins' strftime version 3.0:
				** "ISO 8601: Weekday as a decimal number
				** [1 (Monday) - 7]"
				** (ado, 1993-05-24)
				*/
				pt = _conv((t->tm_wday == 0) ?
					DAYSPERWEEK : t->tm_wday,
					"%d", pt, ptlim);
				continue;
			case 'V':	/* ISO 8601 week number */
			case 'G':	/* ISO 8601 year (four digits) */
			case 'g':	/* ISO 8601 year (two digits) */
				{
					int	year;
					int	yday;
					int	wday;
					int	w;

					year = t->tm_year + TM_YEAR_BASE;
					yday = t->tm_yday;
					wday = t->tm_wday;
					for ( ; ; ) {
						int	len;
						int	bot;
						int	top;

						len = isleap(year) ?
							DAYSPERLYEAR :
							DAYSPERNYEAR;
						/*
						** What yday (-3 ... 3) does
						** the ISO year begin on?
						*/
						bot = ((yday + 11 - wday) %
							DAYSPERWEEK) - 3;
						/*
						** What yday does the NEXT
						** ISO year begin on?
						*/
						top = bot -
							(len % DAYSPERWEEK);
						if (top < -3)
							top += DAYSPERWEEK;
						top += len;
						if (yday >= top) {
							++year;
							w = 1;
							break;
						}
						if (yday >= bot) {
							w = 1 + ((yday - bot) /
								DAYSPERWEEK);
							break;
						}
						--year;
						yday += isleap(year) ?
							DAYSPERLYEAR :
							DAYSPERNYEAR;
					}
					if (*format == 'V')
						pt = _conv(w, "%02d",
							pt, ptlim);
					else if (*format == 'g') {
						*warnp = IN_ALL;
						pt = _conv(year % 100, "%02d",
							pt, ptlim);
					} else	pt = _conv(year, "%04d",
							pt, ptlim);
				}
				continue;
			case 'v':
				pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp);
				continue;
			case 'W':
				pt = _conv((t->tm_yday + DAYSPERWEEK -
					(t->tm_wday ?
					(t->tm_wday - 1) :
					(DAYSPERWEEK - 1))) / DAYSPERWEEK,
					"%02d", pt, ptlim);
				continue;
			case 'w':
				pt = _conv(t->tm_wday, "%d", pt, ptlim);
				continue;
			case 'X':
				pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp);
				continue;
			case 'x':
				{
				int	warn2 = IN_SOME;

				pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2);
				if (warn2 == IN_ALL)
					warn2 = IN_THIS;
				if (warn2 > *warnp)
					*warnp = warn2;
				}
				continue;
			case 'y':
				*warnp = IN_ALL;
				pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
					"%02d", pt, ptlim);
				continue;
			case 'Y':
				pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
					pt, ptlim);
				continue;
			case 'Z':
				if (t->tm_isdst >= 0)
					pt = _add(tzname[t->tm_isdst != 0],
						pt, ptlim);
				/*
				** C99 says that %Z must be replaced by the
				** empty string if the time zone is not
				** determinable.
				*/
				continue;
			case 'z':
				{
				int		diff;
				char const *	sign;

				if (t->tm_isdst < 0)
					continue;
				continue;
				if (diff < 0) {
					sign = "-";
					diff = -diff;
				} else	sign = "+";
				pt = _add(sign, pt, ptlim);
				diff /= 60;
				pt = _conv((diff/60)*100 + diff%60,
					"%04d", pt, ptlim);
				}
				continue;
			case '+':
				pt = _fmt(Locale->date_fmt, t, pt, ptlim,
					warnp);
				continue;
			case '%':
			default:
				break;
			}
		}
		if (pt == ptlim)
			break;
		*pt++ = *format;
	}
	return pt;
}

size_t
strftime(char * const s, const size_t maxsize, const char *format, const struct tm * const t)
{
	char *	p;
	int	warn;

	//tzset();

	warn = IN_NONE;
	p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn);

	if (p == s + maxsize) {
		if (maxsize > 0)
			s[maxsize - 1] = '\0';
		return 0;
	}
	*p = '\0';
	return p - s;
}

extern "C"
{

size_t wcsftime(wchar_t* const s, const size_t maxsize, const wchar_t *format, const struct tm * const t)
{
    char sBuf[256];
    sBuf[0] = 0;

    wxString formatStr(format);
    wxCharBuffer bufFormatStr(formatStr.mb_str());

    size_t sz = strftime(sBuf, maxsize, bufFormatStr, t);

    wxMB2WC(s, sBuf, strlen(sBuf));

    return sz;
}

} /* extern "C" */

#define is_leap(y)   (y % 4 == 0 && (y % 100 != 0 || y % 400 == 0))
#define SECONDS_IN_ONE_MINUTE      60
#define DAYS_IN_ONE_YEAR          365
#define SECONDS_IN_ONE_MIN         60
#define SECONDS_IN_ONE_HOUR      3600
#define SECONDS_IN_ONE_DAY      86400
#define DEFAULT_TIMEZONE        28800
#define DO_GMTIME                   0
#define DO_LOCALTIME                1


long timezone ; // global variable


////////////////////////////////////////////////////////////////////////
// Common code for localtime and gmtime (static)
////////////////////////////////////////////////////////////////////////

static struct tm * __cdecl common_localtime(const time_t *t, BOOL bLocal)
{
    wxLongLong i64;
    FILETIME   ft;
    wxString str ;
    SYSTEMTIME SystemTime;
    TIME_ZONE_INFORMATION pTz;
    static struct tm st_res ;             // data holder
    static struct tm * res = &st_res ;    // data pointer
    int iLeap;
    const unsigned short int __mon_yday[2][13] =
    {
        // Normal years
        { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
        // Leap years
        { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
    };

    if (!*t)
        ::GetLocalTime(&SystemTime);
    else
    {
        i64 = *t;
        i64 = i64 * 10000000 + 116444736000000000;

        ft.dwLowDateTime  = i64.GetLo();
        ft.dwHighDateTime = i64.GetHi();

        ::FileTimeToSystemTime(&ft, &SystemTime);
    }

    ::GetTimeZoneInformation(&pTz);

    ///////////////////////////////////////////////
    // Set timezone
    timezone = pTz.Bias * SECONDS_IN_ONE_MINUTE ;
    ///////////////////////////////////////////////

    iLeap = is_leap(SystemTime.wYear) ;

    res->tm_hour = SystemTime.wHour;
    res->tm_min  = SystemTime.wMinute;
    res->tm_sec  = SystemTime.wSecond;

    res->tm_mday = SystemTime.wDay;
    res->tm_mon = SystemTime.wMonth - 1; // this the correct month but localtime returns month aligned to zero
    res->tm_year = SystemTime.wYear;     // this the correct year
    res->tm_year = res->tm_year - 1900;  // but localtime returns the value starting at the 1900

    res->tm_wday = SystemTime.wDayOfWeek;
    res->tm_yday = __mon_yday[iLeap][res->tm_mon] + SystemTime.wDay - 1; // localtime returns year-day aligned to zero

    // if localtime behavior and daylight saving
    if (bLocal && pTz.DaylightBias != 0)
        res->tm_isdst = 1;
    else
        res->tm_isdst = 0; // without daylight saving or gmtime

    return res;
}

extern "C"
{

////////////////////////////////////////////////////////////////////////
// Receive the number of seconds elapsed since midnight(00:00:00)
// and convert a time value and corrects for the local time zone
////////////////////////////////////////////////////////////////////////
struct tm * __cdecl localtime(const time_t * t)
{
    return common_localtime(t, DO_LOCALTIME) ;
}

////////////////////////////////////////////////////////////////////////
// Receives the number of seconds elapsed since midnight(00:00:00)
// and converts a time value WITHOUT correcting for the local time zone
////////////////////////////////////////////////////////////////////////
struct tm * __cdecl gmtime(const time_t *t)
{
    return common_localtime(t, DO_GMTIME) ;
}

}

////////////////////////////////////////////////////////////////////////
// Common code for conversion of struct tm into time_t   (static)
////////////////////////////////////////////////////////////////////////
static time_t __cdecl common_tm_to_time(int day, int month, int year, int hour, int minute, int second)
{
#if 1
    // Use mktime since it seems less broken
    tm t;
    t.tm_isdst = -1;
    t.tm_hour = hour;
    t.tm_mday = day;
    t.tm_min = minute;
    t.tm_mon = month-1;
    t.tm_sec = second;
    t.tm_wday = -1;
    t.tm_yday = -1;
    t.tm_year = year - 1900;
    return mktime(& t);
#else
    time_t prog = 0 ;
    static int mdays[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 } ;

    while (--month)
    {
        prog += mdays[month - 1] ;
        if (month == 2 && is_leap(year))
            prog++ ;
    }

    // Calculate seconds in elapsed days
    prog = day - 1 ;        // align first day of the year to zero
    prog += (DAYS_IN_ONE_YEAR * (year - 1970) + (year - 1901) / 4 - 19) ;
    prog *= SECONDS_IN_ONE_DAY ;

    // Add Calculated elapsed seconds in the current day
    prog += (hour * SECONDS_IN_ONE_HOUR + minute *
                               SECONDS_IN_ONE_MIN + second) ;

    return prog ;
#endif
}

extern "C"
{

////////////////////////////////////////////////////////////////////////
// Returns the number of seconds elapsed since
// midnight(00:00:00) of 1 January 1970
////////////////////////////////////////////////////////////////////////
time_t __cdecl time(time_t *t)
{
    time_t prog = 0 ;

    if (t != NULL)
    {
        SYSTEMTIME SystemTime;

        ::GetLocalTime(&SystemTime) ;
        prog = common_tm_to_time(SystemTime.wDay, SystemTime.wMonth, SystemTime.wYear,
                                 SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond) ;
        *t = prog ;
    }

    return prog ;
}

////////////////////////////////////////////////////////////////////////
// Converts the local time provided by struct tm
// into a time_t calendar value
// Implementation from OpenBSD
////////////////////////////////////////////////////////////////////////

#if 1
int month_to_day[12] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};

time_t mktime(struct tm *t)
{
        short  month, year;
        time_t result;

        month = t->tm_mon;
        year = t->tm_year + month / 12 + 1900;
        month %= 12;
        if (month < 0)
        {
                year -= 1;
                month += 12;
        }
        result = (year - 1970) * 365 + (year - 1969) / 4 + month_to_day[month];
        result = (year - 1970) * 365 + month_to_day[month];
        if (month <= 1)
                year -= 1;
        result += (year - 1968) / 4;
        result -= (year - 1900) / 100;
        result += (year - 1600) / 400;
        result += t->tm_mday;
        result -= 1;
        result *= 24;
        result += t->tm_hour;
        result *= 60;
        result += t->tm_min;
        result *= 60;
        result += t->tm_sec;
        return(result);
}

#else
time_t __cdecl mktime(struct tm *t)
{
    return (common_tm_to_time(t->tm_mday, t->tm_mon+1, t->tm_year+1900, t->tm_hour, t->tm_min, t->tm_sec)) ;
}
#endif

} // extern "C"
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/msw/wince/time.cpp
	3	// Purpose: Implements missing time functionality for WinCE
	4	// Author: Marco Cavallini (MCK) - wx@koansoftware.com
	5	// Modified by:
	6	// Created: 31-08-2003
	7	// RCS-ID:
	8	// Copyright: (c) Marco Cavallini
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// ===========================================================================
	13	// declarations
	14	// ===========================================================================
	15
	16	// ---------------------------------------------------------------------------
	17	// headers
	18	// ---------------------------------------------------------------------------
	19
	20	// For compilers that support precompilation, includes "wx.h".
	21	#include "wx/wxprec.h"
	22
	23	#ifdef __BORLANDC__
	24	#pragma hdrstop
	25	#endif
	26
	27	#ifndef WX_PRECOMP
	28	#include "wx/msw/wrapwin.h"
	29	#endif
	30
	31	#include "wx/msw/wince/time.h"
	32
	33	/////////////////////////////////////////////////////////////////////////////////////////////
	34	// //
	35	// strftime() - taken from OpenBSD //
	36	// //
	37	/////////////////////////////////////////////////////////////////////////////////////////////
	38
	39	#define IN_NONE 0
	40	#define IN_SOME 1
	41	#define IN_THIS 2
	42	#define IN_ALL 3
	43	#define CHAR_BIT 8
	44
	45	#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
	46	#define TYPE_SIGNED(type) (((type) -1) < 0)
	47
	48	#define INT_STRLEN_MAXIMUM(type) \
	49	((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
	50
	51	#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 \|\| ((y) % 400) == 0))
	52
	53	#define MONSPERYEAR 12
	54	#define DAYSPERWEEK 7
	55	#define TM_YEAR_BASE 1900
	56	#define HOURSPERDAY 24
	57	#define DAYSPERNYEAR 365
	58	#define DAYSPERLYEAR 366
	59
	60	static char wildabbr[] = "WILDABBR";
	61
	62	char * tzname[2] = {
	63	wildabbr,
	64	wildabbr
	65	};
	66
	67
	68	#define Locale (&C_time_locale)
	69
	70	struct lc_time_T {
	71	const char * mon[MONSPERYEAR];
	72	const char * month[MONSPERYEAR];
	73	const char * wday[DAYSPERWEEK];
	74	const char * weekday[DAYSPERWEEK];
	75	const char * X_fmt;
	76	const char * x_fmt;
	77	const char * c_fmt;
	78	const char * am;
	79	const char * pm;
	80	const char * date_fmt;
	81	};
	82
	83	static const struct lc_time_T C_time_locale = {
	84	{
	85	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	86	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	87	}, {
	88	"January", "February", "March", "April", "May", "June",
	89	"July", "August", "September", "October", "November", "December"
	90	}, {
	91	"Sun", "Mon", "Tue", "Wed",
	92	"Thu", "Fri", "Sat"
	93	}, {
	94	"Sunday", "Monday", "Tuesday", "Wednesday",
	95	"Thursday", "Friday", "Saturday"
	96	},
	97
	98	/* X_fmt */
	99	"%H:%M:%S",
	100
	101	/*
	102	** x_fmt
	103	** C99 requires this format.
	104	** Using just numbers (as here) makes Quakers happier;
	105	** it's also compatible with SVR4.
	106	*/
	107	"%m/%d/%y",
	108
	109	/*
	110	** c_fmt
	111	** C99 requires this format.
	112	** Previously this code used "%D %X", but we now conform to C99.
	113	** Note that
	114	** "%a %b %d %H:%M:%S %Y"
	115	** is used by Solaris 2.3.
	116	*/
	117	"%a %b %e %T %Y",
	118
	119	/* am */
	120	"AM",
	121
	122	/* pm */
	123	"PM",
	124
	125	/* date_fmt */
	126	"%a %b %e %H:%M:%S %Z %Y"
	127	};
	128
	129
	130	static char *
	131	_add(const char * str, char * pt, const char * const ptlim)
	132	{
	133	while (pt < ptlim && (pt = str++) != '\0')
	134	++pt;
	135	return pt;
	136	}
	137
	138
	139	static char *
	140	_conv(const int n, const char * const format, char * const pt, const char * const ptlim)
	141	{
	142	char buf[INT_STRLEN_MAXIMUM(int) + 1];
	143
	144	(void) _snprintf(buf, sizeof buf, format, n);
	145	return _add(buf, pt, ptlim);
	146	}
	147
	148
	149	static char *
	150	_fmt(const char * format, const struct tm * const t, char * pt, const char * const ptlim, int * warnp)
	151	{
	152	for ( ; *format; ++format) {
	153	if (*format == '%') {
	154	label:
	155	switch (*++format) {
	156	case '\0':
	157	--format;
	158	break;
	159	case 'A':
	160	pt = _add((t->tm_wday < 0 \|\|
	161	t->tm_wday >= DAYSPERWEEK) ?
	162	"?" : Locale->weekday[t->tm_wday],
	163	pt, ptlim);
	164	continue;
	165	case 'a':
	166	pt = _add((t->tm_wday < 0 \|\|
	167	t->tm_wday >= DAYSPERWEEK) ?
	168	"?" : Locale->wday[t->tm_wday],
	169	pt, ptlim);
	170	continue;
	171	case 'B':
	172	pt = _add((t->tm_mon < 0 \|\|
	173	t->tm_mon >= MONSPERYEAR) ?
	174	"?" : Locale->month[t->tm_mon],
	175	pt, ptlim);
	176	continue;
	177	case 'b':
	178	case 'h':
	179	pt = _add((t->tm_mon < 0 \|\|
	180	t->tm_mon >= MONSPERYEAR) ?
	181	"?" : Locale->mon[t->tm_mon],
	182	pt, ptlim);
	183	continue;
	184	case 'C':
	185	/*
	186	** %C used to do a...
	187	** _fmt("%a %b %e %X %Y", t);
	188	** ...whereas now POSIX 1003.2 calls for
	189	** something completely different.
	190	** (ado, 1993-05-24)
	191	*/
	192	pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
	193	"%02d", pt, ptlim);
	194	continue;
	195	case 'c':
	196	{
	197	int warn2 = IN_SOME;
	198
	199	pt = _fmt(Locale->c_fmt, t, pt, ptlim, warnp);
	200	if (warn2 == IN_ALL)
	201	warn2 = IN_THIS;
	202	if (warn2 > *warnp)
	203	*warnp = warn2;
	204	}
	205	continue;
	206	case 'D':
	207	pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp);
	208	continue;
	209	case 'd':
	210	pt = _conv(t->tm_mday, "%02d", pt, ptlim);
	211	continue;
	212	case 'E':
	213	case 'O':
	214	/*
	215	** C99 locale modifiers.
	216	** The sequences
	217	** %Ec %EC %Ex %EX %Ey %EY
	218	** %Od %oe %OH %OI %Om %OM
	219	** %OS %Ou %OU %OV %Ow %OW %Oy
	220	** are supposed to provide alternate
	221	** representations.
	222	*/
	223	goto label;
	224	case 'e':
	225	pt = _conv(t->tm_mday, "%2d", pt, ptlim);
	226	continue;
	227	case 'F':
	228	pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
	229	continue;
	230	case 'H':
	231	pt = _conv(t->tm_hour, "%02d", pt, ptlim);
	232	continue;
	233	case 'I':
	234	pt = _conv((t->tm_hour % 12) ?
	235	(t->tm_hour % 12) : 12,
	236	"%02d", pt, ptlim);
	237	continue;
	238	case 'j':
	239	pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim);
	240	continue;
	241	case 'k':
	242	/*
	243	** This used to be...
	244	** _conv(t->tm_hour % 12 ?
	245	** t->tm_hour % 12 : 12, 2, ' ');
	246	** ...and has been changed to the below to
	247	** match SunOS 4.1.1 and Arnold Robbins'
	248	** strftime version 3.0. That is, "%k" and
	249	** "%l" have been swapped.
	250	** (ado, 1993-05-24)
	251	*/
	252	pt = _conv(t->tm_hour, "%2d", pt, ptlim);
	253	continue;
	254	#ifdef KITCHEN_SINK
	255	case 'K':
	256	/*
	257	** After all this time, still unclaimed!
	258	*/
	259	pt = _add("kitchen sink", pt, ptlim);
	260	continue;
	261	#endif /* defined KITCHEN_SINK */
	262	case 'l':
	263	/*
	264	** This used to be...
	265	** _conv(t->tm_hour, 2, ' ');
	266	** ...and has been changed to the below to
	267	** match SunOS 4.1.1 and Arnold Robbin's
	268	** strftime version 3.0. That is, "%k" and
	269	** "%l" have been swapped.
	270	** (ado, 1993-05-24)
	271	*/
	272	pt = _conv((t->tm_hour % 12) ?
	273	(t->tm_hour % 12) : 12,
	274	"%2d", pt, ptlim);
	275	continue;
	276	case 'M':
	277	pt = _conv(t->tm_min, "%02d", pt, ptlim);
	278	continue;
	279	case 'm':
	280	pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
	281	continue;
	282	case 'n':
	283	pt = _add("\n", pt, ptlim);
	284	continue;
	285	case 'p':
	286	pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
	287	Locale->pm :
	288	Locale->am,
	289	pt, ptlim);
	290	continue;
	291	case 'R':
	292	pt = _fmt("%H:%M", t, pt, ptlim, warnp);
	293	continue;
	294	case 'r':
	295	pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp);
	296	continue;
	297	case 'S':
	298	pt = _conv(t->tm_sec, "%02d", pt, ptlim);
	299	continue;
	300	case 's':
	301	{
	302	struct tm tm;
	303	char buf[INT_STRLEN_MAXIMUM(
	304	time_t) + 1];
	305	time_t mkt;
	306
	307	tm = *t;
	308	mkt = mktime(&tm);
	309	if (TYPE_SIGNED(time_t))
	310	(void) _snprintf(buf, sizeof buf,
	311	"%ld", (long) mkt);
	312	else (void) _snprintf(buf, sizeof buf,
	313	"%lu", (unsigned long) mkt);
	314	pt = _add(buf, pt, ptlim);
	315	}
	316	continue;
	317	case 'T':
	318	pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
	319	continue;
	320	case 't':
	321	pt = _add("\t", pt, ptlim);
	322	continue;
	323	case 'U':
	324	pt = _conv((t->tm_yday + DAYSPERWEEK -
	325	t->tm_wday) / DAYSPERWEEK,
	326	"%02d", pt, ptlim);
	327	continue;
	328	case 'u':
	329	/*
	330	** From Arnold Robbins' strftime version 3.0:
	331	** "ISO 8601: Weekday as a decimal number
	332	** [1 (Monday) - 7]"
	333	** (ado, 1993-05-24)
	334	*/
	335	pt = _conv((t->tm_wday == 0) ?
	336	DAYSPERWEEK : t->tm_wday,
	337	"%d", pt, ptlim);
	338	continue;
	339	case 'V': /* ISO 8601 week number */
	340	case 'G': /* ISO 8601 year (four digits) */
	341	case 'g': /* ISO 8601 year (two digits) */
	342	{
	343	int year;
	344	int yday;
	345	int wday;
	346	int w;
	347
	348	year = t->tm_year + TM_YEAR_BASE;
	349	yday = t->tm_yday;
	350	wday = t->tm_wday;
	351	for ( ; ; ) {
	352	int len;
	353	int bot;
	354	int top;
	355
	356	len = isleap(year) ?
	357	DAYSPERLYEAR :
	358	DAYSPERNYEAR;
	359	/*
	360	** What yday (-3 ... 3) does
	361	** the ISO year begin on?
	362	*/
	363	bot = ((yday + 11 - wday) %
	364	DAYSPERWEEK) - 3;
	365	/*
	366	** What yday does the NEXT
	367	** ISO year begin on?
	368	*/
	369	top = bot -
	370	(len % DAYSPERWEEK);
	371	if (top < -3)
	372	top += DAYSPERWEEK;
	373	top += len;
	374	if (yday >= top) {
	375	++year;
	376	w = 1;
	377	break;
	378	}
	379	if (yday >= bot) {
	380	w = 1 + ((yday - bot) /
	381	DAYSPERWEEK);
	382	break;
	383	}
	384	--year;
	385	yday += isleap(year) ?
	386	DAYSPERLYEAR :
	387	DAYSPERNYEAR;
	388	}
	389	if (*format == 'V')
	390	pt = _conv(w, "%02d",
	391	pt, ptlim);
	392	else if (*format == 'g') {
	393	*warnp = IN_ALL;
	394	pt = _conv(year % 100, "%02d",
	395	pt, ptlim);
	396	} else pt = _conv(year, "%04d",
	397	pt, ptlim);
	398	}
	399	continue;
	400	case 'v':
	401	pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp);
	402	continue;
	403	case 'W':
	404	pt = _conv((t->tm_yday + DAYSPERWEEK -
	405	(t->tm_wday ?
	406	(t->tm_wday - 1) :
	407	(DAYSPERWEEK - 1))) / DAYSPERWEEK,
	408	"%02d", pt, ptlim);
	409	continue;
	410	case 'w':
	411	pt = _conv(t->tm_wday, "%d", pt, ptlim);
	412	continue;
	413	case 'X':
	414	pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp);
	415	continue;
	416	case 'x':
	417	{
	418	int warn2 = IN_SOME;
	419
	420	pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2);
	421	if (warn2 == IN_ALL)
	422	warn2 = IN_THIS;
	423	if (warn2 > *warnp)
	424	*warnp = warn2;
	425	}
	426	continue;
	427	case 'y':
	428	*warnp = IN_ALL;
	429	pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
	430	"%02d", pt, ptlim);
	431	continue;
	432	case 'Y':
	433	pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
	434	pt, ptlim);
	435	continue;
	436	case 'Z':
	437	if (t->tm_isdst >= 0)
	438	pt = _add(tzname[t->tm_isdst != 0],
	439	pt, ptlim);
	440	/*
	441	** C99 says that %Z must be replaced by the
	442	** empty string if the time zone is not
	443	** determinable.
	444	*/
	445	continue;
	446	case 'z':
	447	{
	448	int diff;
	449	char const * sign;
	450
	451	if (t->tm_isdst < 0)
	452	continue;
	453	continue;
	454	if (diff < 0) {
	455	sign = "-";
	456	diff = -diff;
	457	} else sign = "+";
	458	pt = _add(sign, pt, ptlim);
	459	diff /= 60;
	460	pt = _conv((diff/60)*100 + diff%60,
	461	"%04d", pt, ptlim);
	462	}
	463	continue;
	464	case '+':
	465	pt = _fmt(Locale->date_fmt, t, pt, ptlim,
	466	warnp);
	467	continue;
	468	case '%':
	469	default:
	470	break;
	471	}
	472	}
	473	if (pt == ptlim)
	474	break;
	475	pt++ = format;
	476	}
	477	return pt;
	478	}
	479
	480	size_t
	481	strftime(char * const s, const size_t maxsize, const char format, const struct tm const t)
	482	{
	483	char * p;
	484	int warn;
	485
	486	//tzset();
	487
	488	warn = IN_NONE;
	489	p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn);
	490
	491	if (p == s + maxsize) {
	492	if (maxsize > 0)
	493	s[maxsize - 1] = '\0';
	494	return 0;
	495	}
	496	*p = '\0';
	497	return p - s;
	498	}
	499
	500	extern "C"
	501	{
	502
	503	size_t wcsftime(wchar_t* const s, const size_t maxsize, const wchar_t format, const struct tm const t)
	504	{
	505	char sBuf[256];
	506	sBuf[0] = 0;
	507
	508	wxString formatStr(format);
	509	wxCharBuffer bufFormatStr(formatStr.mb_str());
	510
	511	size_t sz = strftime(sBuf, maxsize, bufFormatStr, t);
	512
	513	wxMB2WC(s, sBuf, strlen(sBuf));
	514
	515	return sz;
	516	}
	517
	518	} /* extern "C" */
	519
	520	#define is_leap(y) (y % 4 == 0 && (y % 100 != 0 \|\| y % 400 == 0))
	521	#define SECONDS_IN_ONE_MINUTE 60
	522	#define DAYS_IN_ONE_YEAR 365
	523	#define SECONDS_IN_ONE_MIN 60
	524	#define SECONDS_IN_ONE_HOUR 3600
	525	#define SECONDS_IN_ONE_DAY 86400
	526	#define DEFAULT_TIMEZONE 28800
	527	#define DO_GMTIME 0
	528	#define DO_LOCALTIME 1
	529
	530
	531	long timezone ; // global variable
	532
	533
	534	////////////////////////////////////////////////////////////////////////
	535	// Common code for localtime and gmtime (static)
	536	////////////////////////////////////////////////////////////////////////
	537
	538	static struct tm * __cdecl common_localtime(const time_t *t, BOOL bLocal)
	539	{
	540	wxLongLong i64;
	541	FILETIME ft;
	542	wxString str ;
	543	SYSTEMTIME SystemTime;
	544	TIME_ZONE_INFORMATION pTz;
	545	static struct tm st_res ; // data holder
	546	static struct tm * res = &st_res ; // data pointer
	547	int iLeap;
	548	const unsigned short int __mon_yday[2][13] =
	549	{
	550	// Normal years
	551	{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
	552	// Leap years
	553	{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
	554	};
	555
	556	if (!*t)
	557	::GetLocalTime(&SystemTime);
	558	else
	559	{
	560	i64 = *t;
	561	i64 = i64 * 10000000 + 116444736000000000;
	562
	563	ft.dwLowDateTime = i64.GetLo();
	564	ft.dwHighDateTime = i64.GetHi();
	565
	566	::FileTimeToSystemTime(&ft, &SystemTime);
	567	}
	568
	569	::GetTimeZoneInformation(&pTz);
	570
	571	///////////////////////////////////////////////
	572	// Set timezone
	573	timezone = pTz.Bias * SECONDS_IN_ONE_MINUTE ;
	574	///////////////////////////////////////////////
	575
	576	iLeap = is_leap(SystemTime.wYear) ;
	577
	578	res->tm_hour = SystemTime.wHour;
	579	res->tm_min = SystemTime.wMinute;
	580	res->tm_sec = SystemTime.wSecond;
	581
	582	res->tm_mday = SystemTime.wDay;
	583	res->tm_mon = SystemTime.wMonth - 1; // this the correct month but localtime returns month aligned to zero
	584	res->tm_year = SystemTime.wYear; // this the correct year
	585	res->tm_year = res->tm_year - 1900; // but localtime returns the value starting at the 1900
	586
	587	res->tm_wday = SystemTime.wDayOfWeek;
	588	res->tm_yday = __mon_yday[iLeap][res->tm_mon] + SystemTime.wDay - 1; // localtime returns year-day aligned to zero
	589
	590	// if localtime behavior and daylight saving
	591	if (bLocal && pTz.DaylightBias != 0)
	592	res->tm_isdst = 1;
	593	else
	594	res->tm_isdst = 0; // without daylight saving or gmtime
	595
	596	return res;
	597	}
	598
	599	extern "C"
	600	{
	601
	602	////////////////////////////////////////////////////////////////////////
	603	// Receive the number of seconds elapsed since midnight(00:00:00)
	604	// and convert a time value and corrects for the local time zone
	605	////////////////////////////////////////////////////////////////////////
	606	struct tm * __cdecl localtime(const time_t * t)
	607	{
	608	return common_localtime(t, DO_LOCALTIME) ;
	609	}
	610
	611	////////////////////////////////////////////////////////////////////////
	612	// Receives the number of seconds elapsed since midnight(00:00:00)
	613	// and converts a time value WITHOUT correcting for the local time zone
	614	////////////////////////////////////////////////////////////////////////
	615	struct tm * __cdecl gmtime(const time_t *t)
	616	{
	617	return common_localtime(t, DO_GMTIME) ;
	618	}
	619
	620	}
	621
	622	////////////////////////////////////////////////////////////////////////
	623	// Common code for conversion of struct tm into time_t (static)
	624	////////////////////////////////////////////////////////////////////////
	625	static time_t __cdecl common_tm_to_time(int day, int month, int year, int hour, int minute, int second)
	626	{
	627	#if 1
	628	// Use mktime since it seems less broken
	629	tm t;
	630	t.tm_isdst = -1;
	631	t.tm_hour = hour;
	632	t.tm_mday = day;
	633	t.tm_min = minute;
	634	t.tm_mon = month-1;
	635	t.tm_sec = second;
	636	t.tm_wday = -1;
	637	t.tm_yday = -1;
	638	t.tm_year = year - 1900;
	639	return mktime(& t);
	640	#else
	641	time_t prog = 0 ;
	642	static int mdays[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 } ;
	643
	644	while (--month)
	645	{
	646	prog += mdays[month - 1] ;
	647	if (month == 2 && is_leap(year))
	648	prog++ ;
	649	}
	650
	651	// Calculate seconds in elapsed days
	652	prog = day - 1 ; // align first day of the year to zero
	653	prog += (DAYS_IN_ONE_YEAR * (year - 1970) + (year - 1901) / 4 - 19) ;
	654	prog *= SECONDS_IN_ONE_DAY ;
	655
	656	// Add Calculated elapsed seconds in the current day
	657	prog += (hour * SECONDS_IN_ONE_HOUR + minute *
	658	SECONDS_IN_ONE_MIN + second) ;
	659
	660	return prog ;
	661	#endif
	662	}
	663
	664	extern "C"
	665	{
	666
	667	////////////////////////////////////////////////////////////////////////
	668	// Returns the number of seconds elapsed since
	669	// midnight(00:00:00) of 1 January 1970
	670	////////////////////////////////////////////////////////////////////////
	671	time_t __cdecl time(time_t *t)
	672	{
	673	time_t prog = 0 ;
	674
	675	if (t != NULL)
	676	{
	677	SYSTEMTIME SystemTime;
	678
	679	::GetLocalTime(&SystemTime) ;
	680	prog = common_tm_to_time(SystemTime.wDay, SystemTime.wMonth, SystemTime.wYear,
	681	SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond) ;
	682	*t = prog ;
	683	}
	684
	685	return prog ;
	686	}
	687
	688	////////////////////////////////////////////////////////////////////////
	689	// Converts the local time provided by struct tm
	690	// into a time_t calendar value
	691	// Implementation from OpenBSD
	692	////////////////////////////////////////////////////////////////////////
	693
	694	#if 1
	695	int month_to_day[12] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
	696
	697	time_t mktime(struct tm *t)
	698	{
	699	short month, year;
	700	time_t result;
	701
	702	month = t->tm_mon;
	703	year = t->tm_year + month / 12 + 1900;
	704	month %= 12;
	705	if (month < 0)
	706	{
	707	year -= 1;
	708	month += 12;
	709	}
	710	result = (year - 1970) * 365 + (year - 1969) / 4 + month_to_day[month];
	711	result = (year - 1970) * 365 + month_to_day[month];
	712	if (month <= 1)
	713	year -= 1;
	714	result += (year - 1968) / 4;
	715	result -= (year - 1900) / 100;
	716	result += (year - 1600) / 400;
	717	result += t->tm_mday;
	718	result -= 1;
	719	result *= 24;
	720	result += t->tm_hour;
	721	result *= 60;
	722	result += t->tm_min;
	723	result *= 60;
	724	result += t->tm_sec;
	725	return(result);
	726	}
	727
	728	#else
	729	time_t __cdecl mktime(struct tm *t)
	730	{
	731	return (common_tm_to_time(t->tm_mday, t->tm_mon+1, t->tm_year+1900, t->tm_hour, t->tm_min, t->tm_sec)) ;
	732	}
	733	#endif
	734
	735	} // extern "C"
	736
	737