[wxWidgets.git] / 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:      $Id$
// 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"
{

/* Not needed in VS Studio 2005 */

#if !(__VISUALC__ >= 1400)
size_t wcsftime(wchar_t *s,
                const size_t maxsize,
                const wchar_t *format,
                const struct tm *t)
{
    wxCharBuffer sBuf(maxsize/sizeof(wchar_t));

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

    size_t sz = strftime(sBuf.data(), maxsize/sizeof(wchar_t), bufFormatStr, t);

    wxMB2WC(s, sBuf, maxsize);

    return sz;
}
#endif

} /* 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
1c193821 JS	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/msw/wince/time.cpp
	3	// Purpose: Implements missing time functionality for WinCE
f22cc0b4 JS	4	// Author: Marco Cavallini (MCK) - wx@koansoftware.com
	5	// Modified by:
	6	// Created: 31-08-2003
11e70ae6	7	// RCS-ID: $Id$
991420e6	8	// Copyright: (c) Marco Cavallini
65571936	9	// Licence: wxWindows licence
1c193821 JS	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// ===========================================================================
	13	// declarations
	14	// ===========================================================================
	15
	16	// ---------------------------------------------------------------------------
	17	// headers
	18	// ---------------------------------------------------------------------------
	19
1c193821 JS	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
9ed0d735	28	#include "wx/msw/wrapwin.h"
1c193821 JS	29	#endif
	30
	31	#include "wx/msw/wince/time.h"
553d7089 JS	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;
24964201	453	continue;
553d7089 JS	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
048128e0	503	/* Not needed in VS Studio 2005 */
79f82e1f	504
048128e0	505	#if !(__VISUALC__ >= 1400)
595191bb VZ	506	size_t wcsftime(wchar_t *s,
	507	const size_t maxsize,
	508	const wchar_t *format,
	509	const struct tm *t)
553d7089	510	{
595191bb VZ	511	wxCharBuffer sBuf(maxsize/sizeof(wchar_t));
595191bb VZ	512
553d7089 JS	513	wxString formatStr(format);
553d7089 JS	514	wxCharBuffer bufFormatStr(formatStr.mb_str());
595191bb	515
11e70ae6	516	size_t sz = strftime(sBuf.data(), maxsize/sizeof(wchar_t), bufFormatStr, t);
595191bb VZ	517
	518	wxMB2WC(s, sBuf, maxsize);
	519
553d7089 JS	520	return sz;
553d7089 JS	521	}
79f82e1f	522	#endif
553d7089 JS	523
553d7089 JS	524	} /* extern "C" */
1c193821	525
f22cc0b4	526	#define is_leap(y) (y % 4 == 0 && (y % 100 != 0 \|\| y % 400 == 0))
991420e6 WS	527	#define SECONDS_IN_ONE_MINUTE 60
	528	#define DAYS_IN_ONE_YEAR 365
	529	#define SECONDS_IN_ONE_MIN 60
	530	#define SECONDS_IN_ONE_HOUR 3600
	531	#define SECONDS_IN_ONE_DAY 86400
	532	#define DEFAULT_TIMEZONE 28800
	533	#define DO_GMTIME 0
	534	#define DO_LOCALTIME 1
1c193821	535
1c193821	536
991420e6	537	long timezone ; // global variable
f22cc0b4 JS	538
	539
	540	////////////////////////////////////////////////////////////////////////
	541	// Common code for localtime and gmtime (static)
	542	////////////////////////////////////////////////////////////////////////
cff614f6 JS	543
cff614f6 JS	544	static struct tm * __cdecl common_localtime(const time_t *t, BOOL bLocal)
1c193821	545	{
cff614f6 JS	546	wxLongLong i64;
cff614f6 JS	547	FILETIME ft;
991420e6 WS	548	wxString str ;
	549	SYSTEMTIME SystemTime;
	550	TIME_ZONE_INFORMATION pTz;
	551	static struct tm st_res ; // data holder
	552	static struct tm * res = &st_res ; // data pointer
	553	int iLeap;
	554	const unsigned short int __mon_yday[2][13] =
	555	{
	556	// Normal years
	557	{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
	558	// Leap years
	559	{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
	560	};
	561
cff614f6 JS	562	if (!*t)
	563	::GetLocalTime(&SystemTime);
	564	else
	565	{
	566	i64 = *t;
	567	i64 = i64 * 10000000 + 116444736000000000;
	568
	569	ft.dwLowDateTime = i64.GetLo();
	570	ft.dwHighDateTime = i64.GetHi();
	571
	572	::FileTimeToSystemTime(&ft, &SystemTime);
	573	}
	574
991420e6 WS	575	::GetTimeZoneInformation(&pTz);
	576
	577	///////////////////////////////////////////////
	578	// Set timezone
	579	timezone = pTz.Bias * SECONDS_IN_ONE_MINUTE ;
	580	///////////////////////////////////////////////
	581
	582	iLeap = is_leap(SystemTime.wYear) ;
	583
	584	res->tm_hour = SystemTime.wHour;
	585	res->tm_min = SystemTime.wMinute;
	586	res->tm_sec = SystemTime.wSecond;
	587
	588	res->tm_mday = SystemTime.wDay;
	589	res->tm_mon = SystemTime.wMonth - 1; // this the correct month but localtime returns month aligned to zero
	590	res->tm_year = SystemTime.wYear; // this the correct year
	591	res->tm_year = res->tm_year - 1900; // but localtime returns the value starting at the 1900
	592
	593	res->tm_wday = SystemTime.wDayOfWeek;
	594	res->tm_yday = __mon_yday[iLeap][res->tm_mon] + SystemTime.wDay - 1; // localtime returns year-day aligned to zero
	595
	596	// if localtime behavior and daylight saving
	597	if (bLocal && pTz.DaylightBias != 0)
	598	res->tm_isdst = 1;
	599	else
	600	res->tm_isdst = 0; // without daylight saving or gmtime
f22cc0b4 JS	601
f22cc0b4 JS	602	return res;
1c193821 JS	603	}
1c193821 JS	604
92bdf9f7 VZ	605	extern "C"
	606	{
	607
f22cc0b4 JS	608	////////////////////////////////////////////////////////////////////////
	609	// Receive the number of seconds elapsed since midnight(00:00:00)
	610	// and convert a time value and corrects for the local time zone
	611	////////////////////////////////////////////////////////////////////////
	612	struct tm * __cdecl localtime(const time_t * t)
1c193821	613	{
991420e6	614	return common_localtime(t, DO_LOCALTIME) ;
1c193821 JS	615	}
1c193821 JS	616
f22cc0b4 JS	617	////////////////////////////////////////////////////////////////////////
	618	// Receives the number of seconds elapsed since midnight(00:00:00)
	619	// and converts a time value WITHOUT correcting for the local time zone
	620	////////////////////////////////////////////////////////////////////////
	621	struct tm * __cdecl gmtime(const time_t *t)
1c193821	622	{
991420e6	623	return common_localtime(t, DO_GMTIME) ;
1c193821 JS	624	}
1c193821 JS	625
92bdf9f7	626	}
f22cc0b4 JS	627
	628	////////////////////////////////////////////////////////////////////////
	629	// Common code for conversion of struct tm into time_t (static)
	630	////////////////////////////////////////////////////////////////////////
	631	static time_t __cdecl common_tm_to_time(int day, int month, int year, int hour, int minute, int second)
1c193821	632	{
553d7089 JS	633	#if 1
	634	// Use mktime since it seems less broken
	635	tm t;
	636	t.tm_isdst = -1;
	637	t.tm_hour = hour;
	638	t.tm_mday = day;
	639	t.tm_min = minute;
	640	t.tm_mon = month-1;
	641	t.tm_sec = second;
	642	t.tm_wday = -1;
	643	t.tm_yday = -1;
	644	t.tm_year = year - 1900;
	645	return mktime(& t);
	646	#else
991420e6 WS	647	time_t prog = 0 ;
	648	static int mdays[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 } ;
	649
	650	while (--month)
	651	{
	652	prog += mdays[month - 1] ;
	653	if (month == 2 && is_leap(year))
	654	prog++ ;
	655	}
	656
	657	// Calculate seconds in elapsed days
	658	prog = day - 1 ; // align first day of the year to zero
	659	prog += (DAYS_IN_ONE_YEAR * (year - 1970) + (year - 1901) / 4 - 19) ;
	660	prog *= SECONDS_IN_ONE_DAY ;
	661
	662	// Add Calculated elapsed seconds in the current day
	663	prog += (hour * SECONDS_IN_ONE_HOUR + minute *
	664	SECONDS_IN_ONE_MIN + second) ;
	665
	666	return prog ;
553d7089	667	#endif
1c193821 JS	668	}
1c193821 JS	669
92bdf9f7 VZ	670	extern "C"
92bdf9f7 VZ	671	{
f22cc0b4 JS	672
	673	////////////////////////////////////////////////////////////////////////
	674	// Returns the number of seconds elapsed since
	675	// midnight(00:00:00) of 1 January 1970
	676	////////////////////////////////////////////////////////////////////////
	677	time_t __cdecl time(time_t *t)
1c193821	678	{
991420e6	679	time_t prog = 0 ;
f22cc0b4	680
991420e6 WS	681	if (t != NULL)
	682	{
	683	SYSTEMTIME SystemTime;
f22cc0b4	684
991420e6 WS	685	::GetLocalTime(&SystemTime) ;
	686	prog = common_tm_to_time(SystemTime.wDay, SystemTime.wMonth, SystemTime.wYear,
	687	SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond) ;
	688	*t = prog ;
	689	}
f22cc0b4	690
991420e6	691	return prog ;
1c193821 JS	692	}
1c193821 JS	693
f22cc0b4 JS	694	////////////////////////////////////////////////////////////////////////
	695	// Converts the local time provided by struct tm
	696	// into a time_t calendar value
553d7089	697	// Implementation from OpenBSD
f22cc0b4	698	////////////////////////////////////////////////////////////////////////
f22cc0b4	699
553d7089 JS	700	#if 1
553d7089 JS	701	int month_to_day[12] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
f22cc0b4	702
553d7089	703	time_t mktime(struct tm *t)
f22cc0b4	704	{
553d7089 JS	705	short month, year;
	706	time_t result;
	707
	708	month = t->tm_mon;
	709	year = t->tm_year + month / 12 + 1900;
	710	month %= 12;
	711	if (month < 0)
	712	{
	713	year -= 1;
	714	month += 12;
	715	}
	716	result = (year - 1970) * 365 + (year - 1969) / 4 + month_to_day[month];
	717	result = (year - 1970) * 365 + month_to_day[month];
	718	if (month <= 1)
	719	year -= 1;
	720	result += (year - 1968) / 4;
	721	result -= (year - 1900) / 100;
	722	result += (year - 1600) / 400;
	723	result += t->tm_mday;
	724	result -= 1;
	725	result *= 24;
	726	result += t->tm_hour;
	727	result *= 60;
	728	result += t->tm_min;
	729	result *= 60;
	730	result += t->tm_sec;
	731	return(result);
	732	}
f22cc0b4	733
553d7089 JS	734	#else
	735	time_t __cdecl mktime(struct tm *t)
	736	{
	737	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)) ;
f22cc0b4	738	}
553d7089	739	#endif
92bdf9f7 VZ	740
92bdf9f7 VZ	741	} // extern "C"
553d7089 JS	742
553d7089 JS	743