time.c 36.3 KB
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/*
 * msvcrt.dll date/time functions
 *
 * Copyright 1996,1998 Marcus Meissner
 * Copyright 1996 Jukka Iivonen
 * Copyright 1997,2000 Uwe Bonnes
 * Copyright 2000 Jon Griffiths
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 * Copyright 2004 Hans Leidekker
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 */
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#include "config.h"

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#define _POSIX_PTHREAD_SEMANTICS /* switch to a 2 arg style asctime_r on Solaris */
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#include <time.h>
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#ifdef HAVE_SYS_TIMES_H
# include <sys/times.h>
#endif
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#include <limits.h>
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#include "msvcrt.h"
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#include "mtdll.h"
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#include "winbase.h"
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#include "winnls.h"
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#include "wine/debug.h"
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#include "wine/unicode.h"
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WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
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static const int MonthLengths[2][12] =
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{
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    { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
    { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
};

static inline int IsLeapYear(int Year)
{
    return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
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}

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static inline void msvcrt_tm_to_unix( struct tm *dest, const struct MSVCRT_tm *src )
{
    memset( dest, 0, sizeof(*dest) );
    dest->tm_sec   = src->tm_sec;
    dest->tm_min   = src->tm_min;
    dest->tm_hour  = src->tm_hour;
    dest->tm_mday  = src->tm_mday;
    dest->tm_mon   = src->tm_mon;
    dest->tm_year  = src->tm_year;
    dest->tm_wday  = src->tm_wday;
    dest->tm_yday  = src->tm_yday;
    dest->tm_isdst = src->tm_isdst;
}

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static inline void unix_tm_to_msvcrt( struct MSVCRT_tm *dest, const struct tm *src )
{
    memset( dest, 0, sizeof(*dest) );
    dest->tm_sec   = src->tm_sec;
    dest->tm_min   = src->tm_min;
    dest->tm_hour  = src->tm_hour;
    dest->tm_mday  = src->tm_mday;
    dest->tm_mon   = src->tm_mon;
    dest->tm_year  = src->tm_year;
    dest->tm_wday  = src->tm_wday;
    dest->tm_yday  = src->tm_yday;
    dest->tm_isdst = src->tm_isdst;
}

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static inline void write_invalid_msvcrt_tm( struct MSVCRT_tm *tm )
{
    tm->tm_sec = -1;
    tm->tm_min = -1;
    tm->tm_hour = -1;
    tm->tm_mday = -1;
    tm->tm_mon = -1;
    tm->tm_year = -1;
    tm->tm_wday = -1;
    tm->tm_yday = -1;
    tm->tm_isdst = -1;
}

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#define SECSPERDAY        86400
/* 1601 to 1970 is 369 years plus 89 leap days */
#define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
#define TICKSPERSEC       10000000
#define TICKSPERMSEC      10000
#define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)

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/**********************************************************************
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 *		_mktime64 (MSVCRT.@)
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 */
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MSVCRT___time64_t CDECL MSVCRT__mktime64(struct MSVCRT_tm *mstm)
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{
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    time_t secs;
    struct tm tm;

    msvcrt_tm_to_unix( &tm, mstm );
    secs = mktime( &tm );
    unix_tm_to_msvcrt( mstm, &tm );

    return secs < 0 ? -1 : secs;
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}

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/**********************************************************************
 *		_mktime32 (MSVCRT.@)
 */
MSVCRT___time32_t CDECL MSVCRT__mktime32(struct MSVCRT_tm *mstm)
{
    return MSVCRT__mktime64( mstm );
}

/**********************************************************************
 *		mktime (MSVCRT.@)
 */
#ifdef _WIN64
MSVCRT___time64_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
{
    return MSVCRT__mktime64( mstm );
}
#else
MSVCRT___time32_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
{
    return MSVCRT__mktime32( mstm );
}
#endif

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/**********************************************************************
 *		_mkgmtime64 (MSVCRT.@)
 *
 * time->tm_isdst value is ignored
 */
MSVCRT___time64_t CDECL MSVCRT__mkgmtime64(struct MSVCRT_tm *time)
{
    SYSTEMTIME st;
    FILETIME ft;
    MSVCRT___time64_t ret;
    int i;

    st.wMilliseconds = 0;
    st.wSecond = time->tm_sec;
    st.wMinute = time->tm_min;
    st.wHour = time->tm_hour;
    st.wDay = time->tm_mday;
    st.wMonth = time->tm_mon+1;
    st.wYear = time->tm_year+1900;

    if(!SystemTimeToFileTime(&st, &ft))
        return -1;

    FileTimeToSystemTime(&ft, &st);
    time->tm_wday = st.wDayOfWeek;

    for(i=time->tm_yday=0; i<st.wMonth-1; i++)
        time->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
    time->tm_yday += st.wDay-1;

    ret = ((MSVCRT___time64_t)ft.dwHighDateTime<<32)+ft.dwLowDateTime;
    ret = (ret-TICKS_1601_TO_1970)/TICKSPERSEC;
    return ret;
}

/**********************************************************************
 *		_mkgmtime32 (MSVCRT.@)
 */
MSVCRT___time32_t CDECL MSVCRT__mkgmtime32(struct MSVCRT_tm *time)
{
    return MSVCRT__mkgmtime64(time);
}

/**********************************************************************
 *		_mkgmtime (MSVCRT.@)
 */
#ifdef _WIN64
MSVCRT___time64_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
{
    return MSVCRT__mkgmtime64(time);
}
#else
MSVCRT___time32_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
{
    return MSVCRT__mkgmtime32(time);
}
#endif

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/*********************************************************************
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 *      _localtime64 (MSVCRT.@)
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 */
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struct MSVCRT_tm* CDECL MSVCRT__localtime64(const MSVCRT___time64_t* secs)
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{
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    struct tm *tm;
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    thread_data_t *data;
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    time_t seconds = *secs;
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    if (seconds < 0) return NULL;

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    _mlock(_TIME_LOCK);
    if (!(tm = localtime( &seconds))) {
        _munlock(_TIME_LOCK);
        return NULL;
    }
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    data = msvcrt_get_thread_data();
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    if(!data->time_buffer)
        data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));

    unix_tm_to_msvcrt( data->time_buffer, tm );
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    _munlock(_TIME_LOCK);
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    return data->time_buffer;
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}

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/*********************************************************************
 *      _localtime64_s (MSVCRT.@)
 */
int CDECL _localtime64_s(struct MSVCRT_tm *time, const MSVCRT___time64_t *secs)
{
    struct tm *tm;
    time_t seconds;

    if (!time || !secs || *secs < 0 || *secs > _MAX__TIME64_T)
    {
        if (time)
            write_invalid_msvcrt_tm(time);

        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    seconds = *secs;

    _mlock(_TIME_LOCK);
    if (!(tm = localtime(&seconds)))
    {
        _munlock(_TIME_LOCK);
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    unix_tm_to_msvcrt(time, tm);
    _munlock(_TIME_LOCK);
    return 0;
}

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/*********************************************************************
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 *      _localtime32 (MSVCRT.@)
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 */
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struct MSVCRT_tm* CDECL MSVCRT__localtime32(const MSVCRT___time32_t* secs)
{
    MSVCRT___time64_t secs64 = *secs;
    return MSVCRT__localtime64( &secs64 );
}

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/*********************************************************************
 *      _localtime32_s (MSVCRT.@)
 */
int CDECL _localtime32_s(struct MSVCRT_tm *time, const MSVCRT___time32_t *secs)
{
    MSVCRT___time64_t secs64;

    if (!time || !secs || *secs < 0)
    {
        if (time)
            write_invalid_msvcrt_tm(time);

        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    secs64 = *secs;
    return _localtime64_s(time, &secs64);
}

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/*********************************************************************
 *      localtime (MSVCRT.@)
 */
#ifdef _WIN64
struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time64_t* secs)
{
    return MSVCRT__localtime64( secs );
}
#else
struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time32_t* secs)
{
    return MSVCRT__localtime32( secs );
}
#endif

/*********************************************************************
 *      _gmtime64 (MSVCRT.@)
 */
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int CDECL MSVCRT__gmtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
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{
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    int i;
    FILETIME ft;
    SYSTEMTIME st;
    ULONGLONG time;

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    if (!res || !secs || *secs < 0) {
        if (res) {
            write_invalid_msvcrt_tm(res);
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        }

        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }
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    time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
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    ft.dwHighDateTime = (UINT)(time >> 32);
    ft.dwLowDateTime  = (UINT)time;
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    FileTimeToSystemTime(&ft, &st);
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    res->tm_sec  = st.wSecond;
    res->tm_min  = st.wMinute;
    res->tm_hour = st.wHour;
    res->tm_mday = st.wDay;
    res->tm_year = st.wYear - 1900;
    res->tm_mon  = st.wMonth - 1;
    res->tm_wday = st.wDayOfWeek;
    for (i = res->tm_yday = 0; i < st.wMonth - 1; i++) {
        res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
    }
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    res->tm_yday += st.wDay - 1;
    res->tm_isdst = 0;
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    return 0;
}
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/*********************************************************************
 *      _gmtime64 (MSVCRT.@)
 */
struct MSVCRT_tm* CDECL MSVCRT__gmtime64(const MSVCRT___time64_t *secs)
{
    thread_data_t * const data = msvcrt_get_thread_data();

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    if(!data->time_buffer)
        data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));

    if(MSVCRT__gmtime64_s(data->time_buffer, secs))
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        return NULL;
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    return data->time_buffer;
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}

/*********************************************************************
 *      _gmtime32_s (MSVCRT.@)
 */
int CDECL MSVCRT__gmtime32_s(struct MSVCRT_tm *res, const MSVCRT___time32_t *secs)
{
    MSVCRT___time64_t secs64;

    if(secs) {
        secs64 = *secs;
        return MSVCRT__gmtime64_s(res, &secs64);
    }
    return MSVCRT__gmtime64_s(res, NULL);
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}

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/*********************************************************************
 *      _gmtime32 (MSVCRT.@)
 */
struct MSVCRT_tm* CDECL MSVCRT__gmtime32(const MSVCRT___time32_t* secs)
{
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    MSVCRT___time64_t secs64;

    if(!secs)
        return NULL;

    secs64 = *secs;
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    return MSVCRT__gmtime64( &secs64 );
}

/*********************************************************************
 *      gmtime (MSVCRT.@)
 */
#ifdef _WIN64
struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time64_t* secs)
{
    return MSVCRT__gmtime64( secs );
}
#else
struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time32_t* secs)
{
    return MSVCRT__gmtime32( secs );
}
#endif

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/**********************************************************************
 *		_strdate (MSVCRT.@)
 */
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char* CDECL MSVCRT__strdate(char* date)
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{
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  static const char format[] = "MM'/'dd'/'yy";
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  GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);

  return date;
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}

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/**********************************************************************
 *              _strdate_s (MSVCRT.@)
 */
int CDECL _strdate_s(char* date, MSVCRT_size_t size)
{
    if(date && size)
        date[0] = '\0';

    if(!date) {
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    if(size < 9) {
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return MSVCRT_ERANGE;
    }

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    MSVCRT__strdate(date);
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    return 0;
}

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/**********************************************************************
 *		_wstrdate (MSVCRT.@)
 */
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MSVCRT_wchar_t* CDECL MSVCRT__wstrdate(MSVCRT_wchar_t* date)
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{
  static const WCHAR format[] = { 'M','M','\'','/','\'','d','d','\'','/','\'','y','y',0 };

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  GetDateFormatW(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
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  return date;
}

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/**********************************************************************
 *              _wstrdate_s (MSVCRT.@)
 */
int CDECL _wstrdate_s(MSVCRT_wchar_t* date, MSVCRT_size_t size)
{
    if(date && size)
        date[0] = '\0';

    if(!date) {
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    if(size < 9) {
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return MSVCRT_ERANGE;
    }

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    MSVCRT__wstrdate(date);
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    return 0;
}

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/*********************************************************************
 *		_strtime (MSVCRT.@)
 */
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char* CDECL MSVCRT__strtime(char* time)
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{
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  static const char format[] = "HH':'mm':'ss";
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  GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, time, 9); 
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  return time;
}

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/*********************************************************************
 *              _strtime_s (MSVCRT.@)
 */
int CDECL _strtime_s(char* time, MSVCRT_size_t size)
{
    if(time && size)
        time[0] = '\0';

    if(!time) {
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    if(size < 9) {
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return MSVCRT_ERANGE;
    }

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    MSVCRT__strtime(time);
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    return 0;
}

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/*********************************************************************
 *		_wstrtime (MSVCRT.@)
 */
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MSVCRT_wchar_t* CDECL MSVCRT__wstrtime(MSVCRT_wchar_t* time)
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{
  static const WCHAR format[] = { 'H','H','\'',':','\'','m','m','\'',':','\'','s','s',0 };

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  GetTimeFormatW(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
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  return time;
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}

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/*********************************************************************
 *              _wstrtime_s (MSVCRT.@)
 */
int CDECL _wstrtime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size)
{
    if(time && size)
        time[0] = '\0';

    if(!time) {
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    if(size < 9) {
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return MSVCRT_ERANGE;
    }

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    MSVCRT__wstrtime(time);
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    return 0;
}

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/*********************************************************************
 *		clock (MSVCRT.@)
 */
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MSVCRT_clock_t CDECL MSVCRT_clock(void)
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{
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  FILETIME ftc, fte, ftk, ftu;
  ULONGLONG utime, ktime;
 
  MSVCRT_clock_t clock;

  GetProcessTimes(GetCurrentProcess(), &ftc, &fte, &ftk, &ftu);

  ktime = ((ULONGLONG)ftk.dwHighDateTime << 32) | ftk.dwLowDateTime;
  utime = ((ULONGLONG)ftu.dwHighDateTime << 32) | ftu.dwLowDateTime;

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  clock = (utime + ktime) / (TICKSPERSEC / MSVCRT_CLOCKS_PER_SEC);
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  return clock;
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}

/*********************************************************************
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 *		_difftime64 (MSVCRT.@)
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 */
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double CDECL MSVCRT__difftime64(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
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{
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  return (double)(time1 - time2);
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}

/*********************************************************************
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 *		_difftime32 (MSVCRT.@)
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 */
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double CDECL MSVCRT__difftime32(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
{
  return (double)(time1 - time2);
}

/*********************************************************************
 *		difftime (MSVCRT.@)
 */
#ifdef _WIN64
double CDECL MSVCRT_difftime(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
{
    return MSVCRT__difftime64( time1, time2 );
}
#else
double CDECL MSVCRT_difftime(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
{
    return MSVCRT__difftime32( time1, time2 );
}
#endif

/*********************************************************************
 *		_ftime64 (MSVCRT.@)
 */
void CDECL MSVCRT__ftime64(struct MSVCRT___timeb64 *buf)
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{
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  TIME_ZONE_INFORMATION tzinfo;
  FILETIME ft;
  ULONGLONG time;

  DWORD tzid = GetTimeZoneInformation(&tzinfo);
  GetSystemTimeAsFileTime(&ft);

  time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;

  buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
  buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
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  buf->timezone = tzinfo.Bias +
      ( tzid == TIME_ZONE_ID_STANDARD ? tzinfo.StandardBias :
      ( tzid == TIME_ZONE_ID_DAYLIGHT ? tzinfo.DaylightBias : 0 ));
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  buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
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}
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/*********************************************************************
 *		_ftime64_s (MSVCRT.@)
 */
int CDECL MSVCRT__ftime64_s(struct MSVCRT___timeb64 *buf)
{
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    if (!MSVCRT_CHECK_PMT( buf != NULL )) return MSVCRT_EINVAL;
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    MSVCRT__ftime64(buf);
    return 0;
}

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/*********************************************************************
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 *		_ftime32 (MSVCRT.@)
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 */
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void CDECL MSVCRT__ftime32(struct MSVCRT___timeb32 *buf)
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{
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    struct MSVCRT___timeb64 buf64;
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    MSVCRT__ftime64( &buf64 );
    buf->time     = buf64.time;
    buf->millitm  = buf64.millitm;
    buf->timezone = buf64.timezone;
    buf->dstflag  = buf64.dstflag;
}
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/*********************************************************************
 *		_ftime32_s (MSVCRT.@)
 */
int CDECL MSVCRT__ftime32_s(struct MSVCRT___timeb32 *buf)
{
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    if (!MSVCRT_CHECK_PMT( buf != NULL )) return MSVCRT_EINVAL;
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    MSVCRT__ftime32(buf);
    return 0;
}

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/*********************************************************************
 *		_ftime (MSVCRT.@)
 */
#ifdef _WIN64
void CDECL MSVCRT__ftime(struct MSVCRT___timeb64 *buf)
{
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    MSVCRT__ftime64( buf );
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}
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#else
void CDECL MSVCRT__ftime(struct MSVCRT___timeb32 *buf)
{
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    MSVCRT__ftime32( buf );
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}
#endif

/*********************************************************************
 *		_time64 (MSVCRT.@)
 */
MSVCRT___time64_t CDECL MSVCRT__time64(MSVCRT___time64_t *buf)
{
    MSVCRT___time64_t curtime;
    struct MSVCRT___timeb64 tb;

    MSVCRT__ftime64(&tb);

    curtime = tb.time;
    return buf ? *buf = curtime : curtime;
}

/*********************************************************************
 *		_time32 (MSVCRT.@)
 */
MSVCRT___time32_t CDECL MSVCRT__time32(MSVCRT___time32_t *buf)
{
    MSVCRT___time32_t curtime;
    struct MSVCRT___timeb64 tb;

    MSVCRT__ftime64(&tb);

    curtime = tb.time;
    return buf ? *buf = curtime : curtime;
}

/*********************************************************************
 *		time (MSVCRT.@)
 */
#ifdef _WIN64
MSVCRT___time64_t CDECL MSVCRT_time(MSVCRT___time64_t* buf)
{
    return MSVCRT__time64( buf );
}
#else
MSVCRT___time32_t CDECL MSVCRT_time(MSVCRT___time32_t* buf)
{
    return MSVCRT__time32( buf );
}
#endif
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/*********************************************************************
 *		_daylight (MSVCRT.@)
 */
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int MSVCRT___daylight = 0;
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/*********************************************************************
 *		__p_daylight (MSVCRT.@)
 */
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int * CDECL MSVCRT___p__daylight(void)
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{
	return &MSVCRT___daylight;
}
715

716 717 718 719 720 721 722 723
/*********************************************************************
 *		_dstbias (MSVCRT.@)
 */
int MSVCRT__dstbias = 0;

/*********************************************************************
 *		__p_dstbias (MSVCRT.@)
 */
724
int * CDECL __p__dstbias(void)
725 726 727 728
{
    return &MSVCRT__dstbias;
}

729 730 731
/*********************************************************************
 *		_timezone (MSVCRT.@)
 */
732
MSVCRT_long MSVCRT___timezone = 0;
733 734 735 736

/*********************************************************************
 *		__p_timezone (MSVCRT.@)
 */
737
MSVCRT_long * CDECL MSVCRT___p__timezone(void)
738 739 740 741
{
	return &MSVCRT___timezone;
}

742 743 744 745 746 747 748
/*********************************************************************
 *		_tzname (MSVCRT.@)
 * NOTES
 *  Some apps (notably Mozilla) insist on writing to these, so the buffer
 *  must be large enough.  The size is picked based on observation of
 *  Windows XP.
 */
749 750
static char tzname_std[64] = "PST";
static char tzname_dst[64] = "PDT";
751 752
char *MSVCRT__tzname[2] = { tzname_std, tzname_dst };

753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
/*********************************************************************
 *		_get_tzname (MSVCRT.@)
 */
int CDECL MSVCRT__get_tzname(MSVCRT_size_t *ret, char *buf, MSVCRT_size_t bufsize, int index)
{
    char *timezone;

    switch(index)
    {
    case 0:
        timezone = tzname_std;
        break;
    case 1:
        timezone = tzname_dst;
        break;
    default:
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    if(!ret || (!buf && bufsize > 0) || (buf && !bufsize))
    {
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return MSVCRT_EINVAL;
    }

    *ret = strlen(timezone)+1;
    if(!buf && !bufsize)
        return 0;

    strcpy(buf, timezone);
    return 0;
}

787 788 789
/*********************************************************************
 *		__p_tzname (MSVCRT.@)
 */
790
char ** CDECL __p__tzname(void)
791 792 793
{
	return MSVCRT__tzname;
}
794 795 796 797

/*********************************************************************
 *		_tzset (MSVCRT.@)
 */
798
void CDECL MSVCRT__tzset(void)
799 800
{
    tzset();
801
#if defined(HAVE_TIMEZONE) && defined(HAVE_DAYLIGHT)
802 803
    MSVCRT___daylight = daylight;
    MSVCRT___timezone = timezone;
804 805 806 807 808
#else
    {
        static const time_t seconds_in_year = (365 * 24 + 6) * 3600;
        time_t t;
        struct tm *tmp;
809
        int zone_january, zone_july;
810

811
        _mlock(_TIME_LOCK);
812
        t = (time(NULL) / seconds_in_year) * seconds_in_year;
813 814 815 816 817
        tmp = localtime(&t);
        zone_january = -tmp->tm_gmtoff;
        t += seconds_in_year / 2;
        tmp = localtime(&t);
        zone_july = -tmp->tm_gmtoff;
818 819
        _munlock(_TIME_LOCK);

820 821 822 823
        MSVCRT___daylight = (zone_january != zone_july);
        MSVCRT___timezone = max(zone_january, zone_july);
    }
#endif
824 825 826 827 828
    lstrcpynA(tzname_std, tzname[0], sizeof(tzname_std));
    tzname_std[sizeof(tzname_std) - 1] = '\0';
    lstrcpynA(tzname_dst, tzname[1], sizeof(tzname_dst));
    tzname_dst[sizeof(tzname_dst) - 1] = '\0';
}
829

830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
static inline BOOL strftime_date(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
        BOOL alternate, const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
{
    char *format;
    SYSTEMTIME st;
    MSVCRT_size_t ret;

    st.wYear = mstm->tm_year + 1900;
    st.wMonth = mstm->tm_mon + 1;
    st.wDayOfWeek = mstm->tm_wday;
    st.wDay = mstm->tm_mday;
    st.wHour = mstm->tm_hour;
    st.wMinute = mstm->tm_min;
    st.wSecond = mstm->tm_sec;
    st.wMilliseconds = 0;

    format = alternate ? time_data->str.names.date : time_data->str.names.short_date;
    ret = GetDateFormatA(time_data->lcid, 0, &st, format, NULL, 0);
    if(ret && ret<max-*pos)
        ret = GetDateFormatA(time_data->lcid, 0, &st, format, str+*pos, max-*pos);
    if(!ret) {
        *str = 0;
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return FALSE;
    }else if(ret > max-*pos) {
        *str = 0;
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return FALSE;
    }
    *pos += ret-1;
    return TRUE;
}

static inline BOOL strftime_time(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
        const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
{
    SYSTEMTIME st;
    MSVCRT_size_t ret;

    st.wYear = mstm->tm_year + 1900;
    st.wMonth = mstm->tm_mon + 1;
    st.wDayOfWeek = mstm->tm_wday;
    st.wDay = mstm->tm_mday;
    st.wHour = mstm->tm_hour;
    st.wMinute = mstm->tm_min;
    st.wSecond = mstm->tm_sec;
    st.wMilliseconds = 0;

    ret = GetTimeFormatA(time_data->lcid, 0, &st, time_data->str.names.time, NULL, 0);
    if(ret && ret<max-*pos)
        ret = GetTimeFormatA(time_data->lcid, 0, &st, time_data->str.names.time,
                str+*pos, max-*pos);
    if(!ret) {
        *str = 0;
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return FALSE;
    }else if(ret > max-*pos) {
        *str = 0;
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return FALSE;
    }
    *pos += ret-1;
    return TRUE;
}

static inline BOOL strftime_str(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max, char *src)
{
    MSVCRT_size_t len = strlen(src);
    if(len > max-*pos) {
        *str = 0;
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return FALSE;
    }

    memcpy(str+*pos, src, len);
    *pos += len;
    return TRUE;
}

static inline BOOL strftime_int(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
        int src, int prec, int l, int h)
{
    MSVCRT_size_t len;

    if(src<l || src>h) {
        *str = 0;
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return FALSE;
    }

    len = MSVCRT__snprintf(str+*pos, max-*pos, "%0*d", prec, src);
    if(len == -1) {
        *str = 0;
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return FALSE;
    }

    *pos += len;
    return TRUE;
}

/*********************************************************************
 *		_Strftime (MSVCRT.@)
 */
MSVCRT_size_t CDECL _Strftime(char *str, MSVCRT_size_t max, const char *format,
        const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
{
    MSVCRT_size_t ret, tmp;
    BOOL alternate;

    TRACE("(%p %ld %s %p %p)\n", str, max, format, mstm, time_data);

    if(!str || !format) {
        if(str && max)
            *str = 0;
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return 0;
    }

    if(!time_data)
        time_data = get_locinfo()->lc_time_curr;

    for(ret=0; *format && ret<max; format++) {
        if(*format != '%') {
            str[ret++] = *format;
            continue;
        }

        format++;
        if(*format == '#') {
            alternate = TRUE;
            format++;
        }else {
            alternate = FALSE;
        }

        if(!mstm)
            goto einval_error;

        switch(*format) {
        case 'c':
            if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
                return 0;
            if(ret < max)
                str[ret++] = ' ';
            if(!strftime_time(str, &ret, max, mstm, time_data))
                return 0;
            break;
        case 'x':
            if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
                return 0;
            break;
        case 'X':
            if(!strftime_time(str, &ret, max, mstm, time_data))
                return 0;
            break;
        case 'a':
            if(mstm->tm_wday<0 || mstm->tm_wday>6)
                goto einval_error;
            if(!strftime_str(str, &ret, max, time_data->str.names.short_wday[mstm->tm_wday]))
                return 0;
            break;
        case 'A':
            if(mstm->tm_wday<0 || mstm->tm_wday>6)
                goto einval_error;
            if(!strftime_str(str, &ret, max, time_data->str.names.wday[mstm->tm_wday]))
                return 0;
            break;
        case 'b':
            if(mstm->tm_mon<0 || mstm->tm_mon>11)
                goto einval_error;
            if(!strftime_str(str, &ret, max, time_data->str.names.short_mon[mstm->tm_mon]))
                return 0;
            break;
        case 'B':
            if(mstm->tm_mon<0 || mstm->tm_mon>11)
                goto einval_error;
            if(!strftime_str(str, &ret, max, time_data->str.names.mon[mstm->tm_mon]))
                return 0;
            break;
        case 'd':
            if(!strftime_int(str, &ret, max, mstm->tm_mday, alternate ? 0 : 2, 0, 31))
                return 0;
            break;
        case 'H':
            if(!strftime_int(str, &ret, max, mstm->tm_hour, alternate ? 0 : 2, 0, 23))
                return 0;
            break;
        case 'I':
            tmp = mstm->tm_hour;
            if(tmp > 12)
                tmp -= 12;
            else if(!tmp)
                tmp = 12;
            if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 1, 12))
                return 0;
            break;
        case 'j':
            if(!strftime_int(str, &ret, max, mstm->tm_yday+1, alternate ? 0 : 3, 1, 366))
                return 0;
            break;
        case 'm':
            if(!strftime_int(str, &ret, max, mstm->tm_mon+1, alternate ? 0 : 2, 1, 12))
                return 0;
            break;
        case 'M':
            if(!strftime_int(str, &ret, max, mstm->tm_min, alternate ? 0 : 2, 0, 59))
                return 0;
            break;
        case 'p':
            if(mstm->tm_hour<0 || mstm->tm_hour>23)
                goto einval_error;
            if(!strftime_str(str, &ret, max, mstm->tm_hour<12 ?
                        time_data->str.names.am : time_data->str.names.pm))
                return 0;
            break;
        case 'S':
            if(!strftime_int(str, &ret, max, mstm->tm_sec, alternate ? 0 : 2, 0, 59))
                return 0;
            break;
        case 'w':
            if(!strftime_int(str, &ret, max, mstm->tm_wday, 0, 0, 6))
                return 0;
            break;
        case 'y':
            if(!strftime_int(str, &ret, max, mstm->tm_year%100, alternate ? 0 : 2, 0, 99))
                return 0;
            break;
        case 'Y':
            tmp = 1900+mstm->tm_year;
            if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 4, 0, 9999))
                return 0;
            break;
        case 'z':
        case 'Z':
            MSVCRT__tzset();
            if(MSVCRT__get_tzname(&tmp, str+ret, max-ret, mstm->tm_isdst ? 1 : 0))
                return 0;
            ret += tmp;
            break;
        case 'U':
        case 'W':
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
            if(mstm->tm_wday<0 || mstm->tm_wday>6 || mstm->tm_yday<0 || mstm->tm_yday>365)
                goto einval_error;
            if(*format == 'U')
                tmp = mstm->tm_wday;
            else if(!mstm->tm_wday)
                tmp = 6;
            else
                tmp = mstm->tm_wday-1;

            tmp = mstm->tm_yday/7 + (tmp<=mstm->tm_yday%7);
            if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 0, 53))
                return 0;
            break;
1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
        case '%':
            str[ret++] = '%';
            break;
        default:
            WARN("unknown format %c\n", *format);
            goto einval_error;
        }
    }

    if(ret == max) {
        if(max)
            *str = 0;
        *MSVCRT__errno() = MSVCRT_ERANGE;
        return 0;
    }

    str[ret] = 0;
    return ret;

einval_error:
    *str = 0;
    *MSVCRT__errno() = MSVCRT_EINVAL;
    return 0;
}

1110
/*********************************************************************
1111 1112
 *		strftime (MSVCRT.@)
 */
1113 1114
MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
                                     const struct MSVCRT_tm *mstm )
1115
{
1116
    return _Strftime(str, max, format, mstm, NULL);
1117 1118
}

1119 1120 1121
/*********************************************************************
 *		wcsftime (MSVCRT.@)
 */
1122 1123
MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
                                     const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
1124
{
1125 1126
    char *s, *fmt;
    MSVCRT_size_t len;
1127

1128
    TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
1129 1130 1131 1132 1133 1134 1135

    len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
    if (!(fmt = MSVCRT_malloc( len ))) return 0;
    WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );

    if ((s = MSVCRT_malloc( max*4 )))
    {
1136
        if (!MSVCRT_strftime( s, max*4, fmt, mstm )) s[0] = 0;
1137 1138 1139 1140 1141 1142 1143 1144
        len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
        if (len) len--;
        MSVCRT_free( s );
    }
    else len = 0;

    MSVCRT_free( fmt );
    return len;
1145 1146
}

1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
static char* asctime_buf(char *buf, const struct MSVCRT_tm *mstm)
{
    static const char wday[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
    static const char month[12][4] = {"Jan", "Feb", "Mar", "Apr", "May",
        "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};

    if (mstm->tm_sec<0 || mstm->tm_sec>59
            || mstm->tm_min<0 || mstm->tm_min>59
            || mstm->tm_hour<0 || mstm->tm_hour>23
            || mstm->tm_mon<0 || mstm->tm_mon>11
            || mstm->tm_wday<0 || mstm->tm_wday>6
            || mstm->tm_year<0 || mstm->tm_mday<0
            || mstm->tm_mday>MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon]) {
        *MSVCRT__errno() = MSVCRT_EINVAL;
        return NULL;
    }

    MSVCRT__snprintf(buf, 26, "%s %s %02d %02d:%02d:%02d %c%03d\n", wday[mstm->tm_wday],
            month[mstm->tm_mon], mstm->tm_mday, mstm->tm_hour, mstm->tm_min,
            mstm->tm_sec, '1'+(mstm->tm_year+900)/1000, (900+mstm->tm_year)%1000);
    return buf;
}

1170 1171 1172
/*********************************************************************
 *		asctime (MSVCRT.@)
 */
1173
char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
1174 1175 1176
{
    thread_data_t *data = msvcrt_get_thread_data();

1177 1178 1179 1180 1181 1182 1183 1184
    /* asctime returns date in format that always has exactly 26 characters */
    if (!data->asctime_buffer) {
        data->asctime_buffer = MSVCRT_malloc(26);
        if (!data->asctime_buffer) {
            *MSVCRT__errno() = MSVCRT_ENOMEM;
            return NULL;
        }
    }
1185

1186
    return asctime_buf(data->asctime_buffer, mstm);
1187 1188
}

1189 1190 1191 1192 1193
/*********************************************************************
 *      asctime_s (MSVCRT.@)
 */
int CDECL MSVCRT_asctime_s(char* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
{
1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
    if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
    if (size) time[0] = 0;
    if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_sec >= 0 && mstm->tm_sec < 60)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_min >= 0 && mstm->tm_min < 60)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_hour >= 0 && mstm->tm_hour < 24)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_mon >= 0 && mstm->tm_mon < 12)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_wday >= 0 && mstm->tm_wday < 7)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_year >= 0)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_mday >= 0)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm->tm_mday <= MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon])) return MSVCRT_EINVAL;
1206

1207
    asctime_buf(time, mstm);
1208 1209 1210
    return 0;
}

1211 1212
/*********************************************************************
 *		_wasctime (MSVCRT.@)
1213
 */
1214
MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
1215
{
1216
    thread_data_t *data = msvcrt_get_thread_data();
1217
    char buffer[26];
1218

1219 1220 1221 1222 1223 1224 1225
    if(!data->wasctime_buffer) {
        data->wasctime_buffer = MSVCRT_malloc(26*sizeof(MSVCRT_wchar_t));
        if(!data->wasctime_buffer) {
            *MSVCRT__errno() = MSVCRT_ENOMEM;
            return NULL;
        }
    }
1226

1227 1228 1229 1230
    if(!asctime_buf(buffer, mstm))
        return NULL;

    MultiByteToWideChar(CP_ACP, 0, buffer, -1, data->wasctime_buffer, 26);
1231 1232 1233
    return data->wasctime_buffer;
}

1234 1235 1236 1237 1238
/*********************************************************************
 *      _wasctime_s (MSVCRT.@)
 */
int CDECL MSVCRT__wasctime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
{
1239 1240
    char buffer[26];
    int ret;
1241

1242 1243 1244 1245
    if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
    if (size) time[0] = 0;
    if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
1246

1247 1248 1249 1250
    ret = MSVCRT_asctime_s(buffer, sizeof(buffer), mstm);
    if(!ret)
        return ret;
    MultiByteToWideChar(CP_ACP, 0, buffer, -1, time, size);
1251 1252 1253
    return 0;
}

1254
/*********************************************************************
1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
 *		_ctime64 (MSVCRT.@)
 */
char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
{
    struct MSVCRT_tm *t;
    t = MSVCRT__localtime64( time );
    if (!t) return NULL;
    return MSVCRT_asctime( t );
}

1265 1266 1267 1268 1269 1270
/*********************************************************************
 *		_ctime64_s (MSVCRT.@)
 */
int CDECL MSVCRT__ctime64_s(char *res, MSVCRT_size_t len, const MSVCRT___time64_t *time)
{
    struct MSVCRT_tm *t;
1271 1272 1273

    if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
1274
    res[0] = '\0';
1275 1276 1277
    if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;

1278 1279 1280 1281 1282
    t = MSVCRT__localtime64( time );
    strcpy( res, MSVCRT_asctime( t ) );
    return 0;
}

1283 1284
/*********************************************************************
 *		_ctime32 (MSVCRT.@)
1285
 */
1286
char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
1287
{
1288
    struct MSVCRT_tm *t;
1289
    t = MSVCRT__localtime32( time );
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    if (!t) return NULL;
    return MSVCRT_asctime( t );
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}

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/*********************************************************************
 *		_ctime32_s (MSVCRT.@)
 */
int CDECL MSVCRT__ctime32_s(char *res, MSVCRT_size_t len, const MSVCRT___time32_t *time)
{
    struct MSVCRT_tm *t;
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    if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
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    res[0] = '\0';
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    if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
    if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;

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    t = MSVCRT__localtime32( time );
    strcpy( res, MSVCRT_asctime( t ) );
    return 0;
}

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/*********************************************************************
 *		ctime (MSVCRT.@)
 */
#ifdef _WIN64
char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
{
    return MSVCRT__ctime64( time );
}
#else
char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
{
    return MSVCRT__ctime32( time );
}
#endif

/*********************************************************************
 *		_wctime64 (MSVCRT.@)
 */
MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
{
    return MSVCRT__wasctime( MSVCRT__localtime64(time) );
}

/*********************************************************************
 *		_wctime32 (MSVCRT.@)
 */
MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
{
    return MSVCRT__wasctime( MSVCRT__localtime32(time) );
}

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/*********************************************************************
 *		_wctime (MSVCRT.@)
 */
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#ifdef _WIN64
MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
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{
1349
    return MSVCRT__wctime64( time );
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}
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#else
MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
{
    return MSVCRT__wctime32( time );
}
#endif