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: Vadim Zeitlin for VC8 support
// 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"

#if defined(__VISUALC__) && (__VISUALC__ >= 1400)

// VC8 does provide the time functions but not the standard ones
#include <altcecrt.h>

time_t __cdecl time(time_t *t)
{
    __time64_t t64;
    if ( !_time64(&t64) )
        return (time_t)-1;

    if ( t )
        *t = (time_t)t64;

    return (time_t)t64;
}

time_t __cdecl mktime(struct tm *t)
{
    return (time_t)_mktime64(t);
}

#else // !VC8

/////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                         //
//                             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 = -timezone;
                char const *    sign;

                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 */

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;
}

} /* 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 behaviour 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"

#endif // VC8/!VC8
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: Vadim Zeitlin for VC8 support
	6	// Created: 31-08-2003
	7	// RCS-ID: $Id$
	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	#if defined(__VISUALC__) && (__VISUALC__ >= 1400)
	34
	35	// VC8 does provide the time functions but not the standard ones
	36	#include <altcecrt.h>
	37
	38	time_t __cdecl time(time_t *t)
	39	{
	40	__time64_t t64;
	41	if ( !_time64(&t64) )
	42	return (time_t)-1;
	43
	44	if ( t )
	45	*t = (time_t)t64;
	46
	47	return (time_t)t64;
	48	}
	49
	50	time_t __cdecl mktime(struct tm *t)
	51	{
	52	return (time_t)_mktime64(t);
	53	}
	54
	55	#else // !VC8
	56
	57	/////////////////////////////////////////////////////////////////////////////////////////////
	58	// //
	59	// strftime() - taken from OpenBSD //
	60	// //
	61	/////////////////////////////////////////////////////////////////////////////////////////////
	62
	63	#define IN_NONE 0
	64	#define IN_SOME 1
	65	#define IN_THIS 2
	66	#define IN_ALL 3
	67	#define CHAR_BIT 8
	68
	69	#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
	70	#define TYPE_SIGNED(type) (((type) -1) < 0)
	71
	72	#define INT_STRLEN_MAXIMUM(type) \
	73	((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
	74
	75	#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 \|\| ((y) % 400) == 0))
	76
	77	#define MONSPERYEAR 12
	78	#define DAYSPERWEEK 7
	79	#define TM_YEAR_BASE 1900
	80	#define HOURSPERDAY 24
	81	#define DAYSPERNYEAR 365
	82	#define DAYSPERLYEAR 366
	83
	84	static char wildabbr[] = "WILDABBR";
	85
	86	char * tzname[2] = {
	87	wildabbr,
	88	wildabbr
	89	};
	90
	91
	92	#define Locale (&C_time_locale)
	93
	94	struct lc_time_T {
	95	const char * mon[MONSPERYEAR];
	96	const char * month[MONSPERYEAR];
	97	const char * wday[DAYSPERWEEK];
	98	const char * weekday[DAYSPERWEEK];
	99	const char * X_fmt;
	100	const char * x_fmt;
	101	const char * c_fmt;
	102	const char * am;
	103	const char * pm;
	104	const char * date_fmt;
	105	};
	106
	107	static const struct lc_time_T C_time_locale = {
	108	{
	109	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	110	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	111	}, {
	112	"January", "February", "March", "April", "May", "June",
	113	"July", "August", "September", "October", "November", "December"
	114	}, {
	115	"Sun", "Mon", "Tue", "Wed",
	116	"Thu", "Fri", "Sat"
	117	}, {
	118	"Sunday", "Monday", "Tuesday", "Wednesday",
	119	"Thursday", "Friday", "Saturday"
	120	},
	121
	122	/* X_fmt */
	123	"%H:%M:%S",
	124
	125	/*
	126	** x_fmt
	127	** C99 requires this format.
	128	** Using just numbers (as here) makes Quakers happier;
	129	** it's also compatible with SVR4.
	130	*/
	131	"%m/%d/%y",
	132
	133	/*
	134	** c_fmt
	135	** C99 requires this format.
	136	** Previously this code used "%D %X", but we now conform to C99.
	137	** Note that
	138	** "%a %b %d %H:%M:%S %Y"
	139	** is used by Solaris 2.3.
	140	*/
	141	"%a %b %e %T %Y",
	142
	143	/* am */
	144	"AM",
	145
	146	/* pm */
	147	"PM",
	148
	149	/* date_fmt */
	150	"%a %b %e %H:%M:%S %Z %Y"
	151	};
	152
	153
	154	static char *
	155	_add(const char * str, char * pt, const char * const ptlim)
	156	{
	157	while (pt < ptlim && (pt = str++) != '\0')
	158	++pt;
	159	return pt;
	160	}
	161
	162
	163	static char *
	164	_conv(const int n, const char * const format, char * const pt, const char * const ptlim)
	165	{
	166	char buf[INT_STRLEN_MAXIMUM(int) + 1];
	167
	168	(void) _snprintf(buf, sizeof buf, format, n);
	169	return _add(buf, pt, ptlim);
	170	}
	171
	172
	173	static char *
	174	_fmt(const char * format, const struct tm * const t, char * pt, const char * const ptlim, int * warnp)
	175	{
	176	for ( ; *format; ++format) {
	177	if (*format == '%') {
	178	label:
	179	switch (*++format) {
	180	case '\0':
	181	--format;
	182	break;
	183	case 'A':
	184	pt = _add((t->tm_wday < 0 \|\|
	185	t->tm_wday >= DAYSPERWEEK) ?
	186	"?" : Locale->weekday[t->tm_wday],
	187	pt, ptlim);
	188	continue;
	189	case 'a':
	190	pt = _add((t->tm_wday < 0 \|\|
	191	t->tm_wday >= DAYSPERWEEK) ?
	192	"?" : Locale->wday[t->tm_wday],
	193	pt, ptlim);
	194	continue;
	195	case 'B':
	196	pt = _add((t->tm_mon < 0 \|\|
	197	t->tm_mon >= MONSPERYEAR) ?
	198	"?" : Locale->month[t->tm_mon],
	199	pt, ptlim);
	200	continue;
	201	case 'b':
	202	case 'h':
	203	pt = _add((t->tm_mon < 0 \|\|
	204	t->tm_mon >= MONSPERYEAR) ?
	205	"?" : Locale->mon[t->tm_mon],
	206	pt, ptlim);
	207	continue;
	208	case 'C':
	209	/*
	210	** %C used to do a...
	211	** _fmt("%a %b %e %X %Y", t);
	212	** ...whereas now POSIX 1003.2 calls for
	213	** something completely different.
	214	** (ado, 1993-05-24)
	215	*/
	216	pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
	217	"%02d", pt, ptlim);
	218	continue;
	219	case 'c':
	220	{
	221	int warn2 = IN_SOME;
	222
	223	pt = _fmt(Locale->c_fmt, t, pt, ptlim, warnp);
	224	if (warn2 == IN_ALL)
	225	warn2 = IN_THIS;
	226	if (warn2 > *warnp)
	227	*warnp = warn2;
	228	}
	229	continue;
	230	case 'D':
	231	pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp);
	232	continue;
	233	case 'd':
	234	pt = _conv(t->tm_mday, "%02d", pt, ptlim);
	235	continue;
	236	case 'E':
	237	case 'O':
	238	/*
	239	** C99 locale modifiers.
	240	** The sequences
	241	** %Ec %EC %Ex %EX %Ey %EY
	242	** %Od %oe %OH %OI %Om %OM
	243	** %OS %Ou %OU %OV %Ow %OW %Oy
	244	** are supposed to provide alternate
	245	** representations.
	246	*/
	247	goto label;
	248	case 'e':
	249	pt = _conv(t->tm_mday, "%2d", pt, ptlim);
	250	continue;
	251	case 'F':
	252	pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
	253	continue;
	254	case 'H':
	255	pt = _conv(t->tm_hour, "%02d", pt, ptlim);
	256	continue;
	257	case 'I':
	258	pt = _conv((t->tm_hour % 12) ?
	259	(t->tm_hour % 12) : 12,
	260	"%02d", pt, ptlim);
	261	continue;
	262	case 'j':
	263	pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim);
	264	continue;
	265	case 'k':
	266	/*
	267	** This used to be...
	268	** _conv(t->tm_hour % 12 ?
	269	** t->tm_hour % 12 : 12, 2, ' ');
	270	** ...and has been changed to the below to
	271	** match SunOS 4.1.1 and Arnold Robbins'
	272	** strftime version 3.0. That is, "%k" and
	273	** "%l" have been swapped.
	274	** (ado, 1993-05-24)
	275	*/
	276	pt = _conv(t->tm_hour, "%2d", pt, ptlim);
	277	continue;
	278	#ifdef KITCHEN_SINK
	279	case 'K':
	280	/*
	281	** After all this time, still unclaimed!
	282	*/
	283	pt = _add("kitchen sink", pt, ptlim);
	284	continue;
	285	#endif /* defined KITCHEN_SINK */
	286	case 'l':
	287	/*
	288	** This used to be...
	289	** _conv(t->tm_hour, 2, ' ');
	290	** ...and has been changed to the below to
	291	** match SunOS 4.1.1 and Arnold Robbin's
	292	** strftime version 3.0. That is, "%k" and
	293	** "%l" have been swapped.
	294	** (ado, 1993-05-24)
	295	*/
	296	pt = _conv((t->tm_hour % 12) ?
	297	(t->tm_hour % 12) : 12,
	298	"%2d", pt, ptlim);
	299	continue;
	300	case 'M':
	301	pt = _conv(t->tm_min, "%02d", pt, ptlim);
	302	continue;
	303	case 'm':
	304	pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
	305	continue;
	306	case 'n':
	307	pt = _add("\n", pt, ptlim);
	308	continue;
	309	case 'p':
	310	pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
	311	Locale->pm :
	312	Locale->am,
	313	pt, ptlim);
	314	continue;
	315	case 'R':
	316	pt = _fmt("%H:%M", t, pt, ptlim, warnp);
	317	continue;
	318	case 'r':
	319	pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp);
	320	continue;
	321	case 'S':
	322	pt = _conv(t->tm_sec, "%02d", pt, ptlim);
	323	continue;
	324	case 's':
	325	{
	326	struct tm tm;
	327	char buf[INT_STRLEN_MAXIMUM(
	328	time_t) + 1];
	329	time_t mkt;
	330
	331	tm = *t;
	332	mkt = mktime(&tm);
	333	if (TYPE_SIGNED(time_t))
	334	(void) _snprintf(buf, sizeof buf,
	335	"%ld", (long) mkt);
	336	else (void) _snprintf(buf, sizeof buf,
	337	"%lu", (unsigned long) mkt);
	338	pt = _add(buf, pt, ptlim);
	339	}
	340	continue;
	341	case 'T':
	342	pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
	343	continue;
	344	case 't':
	345	pt = _add("\t", pt, ptlim);
	346	continue;
	347	case 'U':
	348	pt = _conv((t->tm_yday + DAYSPERWEEK -
	349	t->tm_wday) / DAYSPERWEEK,
	350	"%02d", pt, ptlim);
	351	continue;
	352	case 'u':
	353	/*
	354	** From Arnold Robbins' strftime version 3.0:
	355	** "ISO 8601: Weekday as a decimal number
	356	** [1 (Monday) - 7]"
	357	** (ado, 1993-05-24)
	358	*/
	359	pt = _conv((t->tm_wday == 0) ?
	360	DAYSPERWEEK : t->tm_wday,
	361	"%d", pt, ptlim);
	362	continue;
	363	case 'V': /* ISO 8601 week number */
	364	case 'G': /* ISO 8601 year (four digits) */
	365	case 'g': /* ISO 8601 year (two digits) */
	366	{
	367	int year;
	368	int yday;
	369	int wday;
	370	int w;
	371
	372	year = t->tm_year + TM_YEAR_BASE;
	373	yday = t->tm_yday;
	374	wday = t->tm_wday;
	375	for ( ; ; ) {
	376	int len;
	377	int bot;
	378	int top;
	379
	380	len = isleap(year) ?
	381	DAYSPERLYEAR :
	382	DAYSPERNYEAR;
	383	/*
	384	** What yday (-3 ... 3) does
	385	** the ISO year begin on?
	386	*/
	387	bot = ((yday + 11 - wday) %
	388	DAYSPERWEEK) - 3;
	389	/*
	390	** What yday does the NEXT
	391	** ISO year begin on?
	392	*/
	393	top = bot -
	394	(len % DAYSPERWEEK);
	395	if (top < -3)
	396	top += DAYSPERWEEK;
	397	top += len;
	398	if (yday >= top) {
	399	++year;
	400	w = 1;
	401	break;
	402	}
	403	if (yday >= bot) {
	404	w = 1 + ((yday - bot) /
	405	DAYSPERWEEK);
	406	break;
	407	}
	408	--year;
	409	yday += isleap(year) ?
	410	DAYSPERLYEAR :
	411	DAYSPERNYEAR;
	412	}
	413	if (*format == 'V')
	414	pt = _conv(w, "%02d",
	415	pt, ptlim);
	416	else if (*format == 'g') {
	417	*warnp = IN_ALL;
	418	pt = _conv(year % 100, "%02d",
	419	pt, ptlim);
	420	} else pt = _conv(year, "%04d",
	421	pt, ptlim);
	422	}
	423	continue;
	424	case 'v':
	425	pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp);
	426	continue;
	427	case 'W':
	428	pt = _conv((t->tm_yday + DAYSPERWEEK -
	429	(t->tm_wday ?
	430	(t->tm_wday - 1) :
	431	(DAYSPERWEEK - 1))) / DAYSPERWEEK,
	432	"%02d", pt, ptlim);
	433	continue;
	434	case 'w':
	435	pt = _conv(t->tm_wday, "%d", pt, ptlim);
	436	continue;
	437	case 'X':
	438	pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp);
	439	continue;
	440	case 'x':
	441	{
	442	int warn2 = IN_SOME;
	443
	444	pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2);
	445	if (warn2 == IN_ALL)
	446	warn2 = IN_THIS;
	447	if (warn2 > *warnp)
	448	*warnp = warn2;
	449	}
	450	continue;
	451	case 'y':
	452	*warnp = IN_ALL;
	453	pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
	454	"%02d", pt, ptlim);
	455	continue;
	456	case 'Y':
	457	pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
	458	pt, ptlim);
	459	continue;
	460	case 'Z':
	461	if (t->tm_isdst >= 0)
	462	pt = _add(tzname[t->tm_isdst != 0],
	463	pt, ptlim);
	464	/*
	465	** C99 says that %Z must be replaced by the
	466	** empty string if the time zone is not
	467	** determinable.
	468	*/
	469	continue;
	470	case 'z':
	471	{
	472	int diff = -timezone;
	473	char const * sign;
	474
	475	if (diff < 0) {
	476	sign = "-";
	477	diff = -diff;
	478	} else sign = "+";
	479	pt = _add(sign, pt, ptlim);
	480	diff /= 60;
	481	pt = _conv((diff/60)*100 + diff%60,
	482	"%04d", pt, ptlim);
	483	}
	484	continue;
	485	case '+':
	486	pt = _fmt(Locale->date_fmt, t, pt, ptlim,
	487	warnp);
	488	continue;
	489	case '%':
	490	default:
	491	break;
	492	}
	493	}
	494	if (pt == ptlim)
	495	break;
	496	pt++ = format;
	497	}
	498	return pt;
	499	}
	500
	501	size_t
	502	strftime(char * const s, const size_t maxsize, const char format, const struct tm const t)
	503	{
	504	char *p;
	505	int warn;
	506
	507	//tzset();
	508
	509	warn = IN_NONE;
	510	p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn);
	511
	512	if (p == s + maxsize) {
	513	if (maxsize > 0)
	514	s[maxsize - 1] = '\0';
	515	return 0;
	516	}
	517	*p = '\0';
	518	return p - s;
	519	}
	520
	521	extern "C"
	522	{
	523
	524	/* Not needed in VS Studio 2005 */
	525
	526	size_t wcsftime(wchar_t *s,
	527	const size_t maxsize,
	528	const wchar_t *format,
	529	const struct tm *t)
	530	{
	531	wxCharBuffer sBuf(maxsize/sizeof(wchar_t));
	532
	533	wxString formatStr(format);
	534	wxCharBuffer bufFormatStr(formatStr.mb_str());
	535
	536	size_t sz = strftime(sBuf.data(), maxsize/sizeof(wchar_t), bufFormatStr, t);
	537
	538	wxMB2WC(s, sBuf, maxsize);
	539
	540	return sz;
	541	}
	542
	543	} /* extern "C" */
	544
	545	#define is_leap(y) (y % 4 == 0 && (y % 100 != 0 \|\| y % 400 == 0))
	546	#define SECONDS_IN_ONE_MINUTE 60
	547	#define DAYS_IN_ONE_YEAR 365
	548	#define SECONDS_IN_ONE_MIN 60
	549	#define SECONDS_IN_ONE_HOUR 3600
	550	#define SECONDS_IN_ONE_DAY 86400
	551	#define DEFAULT_TIMEZONE 28800
	552	#define DO_GMTIME 0
	553	#define DO_LOCALTIME 1
	554
	555
	556	long timezone ; // global variable
	557
	558
	559	////////////////////////////////////////////////////////////////////////
	560	// Common code for localtime and gmtime (static)
	561	////////////////////////////////////////////////////////////////////////
	562
	563	static struct tm * __cdecl common_localtime(const time_t *t, BOOL bLocal)
	564	{
	565	wxLongLong i64;
	566	FILETIME ft;
	567	wxString str ;
	568	SYSTEMTIME SystemTime;
	569	TIME_ZONE_INFORMATION pTz;
	570	static struct tm st_res ; // data holder
	571	static struct tm * res = &st_res ; // data pointer
	572	int iLeap;
	573	const unsigned short int __mon_yday[2][13] =
	574	{
	575	// Normal years
	576	{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
	577	// Leap years
	578	{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
	579	};
	580
	581	if (!*t)
	582	::GetLocalTime(&SystemTime);
	583	else
	584	{
	585	i64 = *t;
	586	i64 = i64 * 10000000 + 116444736000000000;
	587
	588	ft.dwLowDateTime = i64.GetLo();
	589	ft.dwHighDateTime = i64.GetHi();
	590
	591	::FileTimeToSystemTime(&ft, &SystemTime);
	592	}
	593
	594	::GetTimeZoneInformation(&pTz);
	595
	596	///////////////////////////////////////////////
	597	// Set timezone
	598	timezone = pTz.Bias * SECONDS_IN_ONE_MINUTE ;
	599	///////////////////////////////////////////////
	600
	601	iLeap = is_leap(SystemTime.wYear) ;
	602
	603	res->tm_hour = SystemTime.wHour;
	604	res->tm_min = SystemTime.wMinute;
	605	res->tm_sec = SystemTime.wSecond;
	606
	607	res->tm_mday = SystemTime.wDay;
	608	res->tm_mon = SystemTime.wMonth - 1; // this the correct month but localtime returns month aligned to zero
	609	res->tm_year = SystemTime.wYear; // this the correct year
	610	res->tm_year = res->tm_year - 1900; // but localtime returns the value starting at the 1900
	611
	612	res->tm_wday = SystemTime.wDayOfWeek;
	613	res->tm_yday = __mon_yday[iLeap][res->tm_mon] + SystemTime.wDay - 1; // localtime returns year-day aligned to zero
	614
	615	// if localtime behaviour and daylight saving
	616	if (bLocal && pTz.DaylightBias != 0)
	617	res->tm_isdst = 1;
	618	else
	619	res->tm_isdst = 0; // without daylight saving or gmtime
	620
	621	return res;
	622	}
	623
	624	extern "C"
	625	{
	626
	627	////////////////////////////////////////////////////////////////////////
	628	// Receive the number of seconds elapsed since midnight(00:00:00)
	629	// and convert a time value and corrects for the local time zone
	630	////////////////////////////////////////////////////////////////////////
	631	struct tm * __cdecl localtime(const time_t * t)
	632	{
	633	return common_localtime(t, DO_LOCALTIME) ;
	634	}
	635
	636	////////////////////////////////////////////////////////////////////////
	637	// Receives the number of seconds elapsed since midnight(00:00:00)
	638	// and converts a time value WITHOUT correcting for the local time zone
	639	////////////////////////////////////////////////////////////////////////
	640	struct tm * __cdecl gmtime(const time_t *t)
	641	{
	642	return common_localtime(t, DO_GMTIME) ;
	643	}
	644
	645	}
	646
	647	////////////////////////////////////////////////////////////////////////
	648	// Common code for conversion of struct tm into time_t (static)
	649	////////////////////////////////////////////////////////////////////////
	650	static time_t __cdecl common_tm_to_time(int day, int month, int year, int hour, int minute, int second)
	651	{
	652	#if 1
	653	// Use mktime since it seems less broken
	654	tm t;
	655	t.tm_isdst = -1;
	656	t.tm_hour = hour;
	657	t.tm_mday = day;
	658	t.tm_min = minute;
	659	t.tm_mon = month-1;
	660	t.tm_sec = second;
	661	t.tm_wday = -1;
	662	t.tm_yday = -1;
	663	t.tm_year = year - 1900;
	664	return mktime(& t);
	665	#else
	666	time_t prog = 0 ;
	667	static int mdays[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 } ;
	668
	669	while (--month)
	670	{
	671	prog += mdays[month - 1] ;
	672	if (month == 2 && is_leap(year))
	673	prog++ ;
	674	}
	675
	676	// Calculate seconds in elapsed days
	677	prog = day - 1 ; // align first day of the year to zero
	678	prog += (DAYS_IN_ONE_YEAR * (year - 1970) + (year - 1901) / 4 - 19) ;
	679	prog *= SECONDS_IN_ONE_DAY ;
	680
	681	// Add Calculated elapsed seconds in the current day
	682	prog += (hour * SECONDS_IN_ONE_HOUR + minute *
	683	SECONDS_IN_ONE_MIN + second) ;
	684
	685	return prog ;
	686	#endif
	687	}
	688
	689	extern "C"
	690	{
	691
	692	////////////////////////////////////////////////////////////////////////
	693	// Returns the number of seconds elapsed since
	694	// midnight(00:00:00) of 1 January 1970
	695	////////////////////////////////////////////////////////////////////////
	696	time_t __cdecl time(time_t *t)
	697	{
	698	time_t prog = 0 ;
	699
	700	if (t != NULL)
	701	{
	702	SYSTEMTIME SystemTime;
	703
	704	::GetLocalTime(&SystemTime) ;
	705	prog = common_tm_to_time(SystemTime.wDay, SystemTime.wMonth, SystemTime.wYear,
	706	SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond) ;
	707	*t = prog ;
	708	}
	709
	710	return prog ;
	711	}
	712
	713	////////////////////////////////////////////////////////////////////////
	714	// Converts the local time provided by struct tm
	715	// into a time_t calendar value
	716	// Implementation from OpenBSD
	717	////////////////////////////////////////////////////////////////////////
	718
	719	#if 1
	720	int month_to_day[12] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
	721
	722	time_t mktime(struct tm *t)
	723	{
	724	short month, year;
	725	time_t result;
	726
	727	month = t->tm_mon;
	728	year = t->tm_year + month / 12 + 1900;
	729	month %= 12;
	730	if (month < 0)
	731	{
	732	year -= 1;
	733	month += 12;
	734	}
	735	result = (year - 1970) * 365 + (year - 1969) / 4 + month_to_day[month];
	736	result = (year - 1970) * 365 + month_to_day[month];
	737	if (month <= 1)
	738	year -= 1;
	739	result += (year - 1968) / 4;
	740	result -= (year - 1900) / 100;
	741	result += (year - 1600) / 400;
	742	result += t->tm_mday;
	743	result -= 1;
	744	result *= 24;
	745	result += t->tm_hour;
	746	result *= 60;
	747	result += t->tm_min;
	748	result *= 60;
	749	result += t->tm_sec;
	750	return(result);
	751	}
	752
	753	#else
	754	time_t __cdecl mktime(struct tm *t)
	755	{
	756	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)) ;
	757	}
	758	#endif
	759
	760	} // extern "C"
	761
	762	#endif // VC8/!VC8