dlls/msvcrt/time.c

   1 /*
   2  * msvcrt.dll date/time functions
   3  *
   4  * Copyright 1996,1998 Marcus Meissner
   5  * Copyright 1996 Jukka Iivonen
   6  * Copyright 1997,2000 Uwe Bonnes
   7  * Copyright 2000 Jon Griffiths
   8  * Copyright 2004 Hans Leidekker
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 #include "config.h"
  26
  27 #include <stdlib.h>
  28
  29 #include "msvcrt.h"
  30 #include "mtdll.h"
  31 #include "winbase.h"
  32 #include "winnls.h"
  33 #include "wine/debug.h"
  34 #include "wine/unicode.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  37
  38 static const int MonthLengths[2][12] =
  39 {
  40     { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
  41     { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
  42 };
  43
  44 static inline int IsLeapYear(int Year)
  45 {
  46     return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
  47 }
  48
  49 static inline void write_invalid_msvcrt_tm( struct MSVCRT_tm *tm )
  50 {
  51     tm->tm_sec = -1;
  52     tm->tm_min = -1;
  53     tm->tm_hour = -1;
  54     tm->tm_mday = -1;
  55     tm->tm_mon = -1;
  56     tm->tm_year = -1;
  57     tm->tm_wday = -1;
  58     tm->tm_yday = -1;
  59     tm->tm_isdst = -1;
  60 }
  61
  62 /*********************************************************************
  63  *              _daylight (MSVCRT.@)
  64  */
  65 int MSVCRT___daylight = 1;
  66
  67 /*********************************************************************
  68  *              _timezone (MSVCRT.@)
  69  */
  70 MSVCRT_long MSVCRT___timezone = 28800;
  71
  72 /*********************************************************************
  73  *              _dstbias (MSVCRT.@)
  74  */
  75 int MSVCRT__dstbias = -3600;
  76
  77 /*********************************************************************
  78  *              _tzname (MSVCRT.@)
  79  * NOTES
  80  *  Some apps (notably Mozilla) insist on writing to these, so the buffer
  81  *  must be large enough.
  82  */
  83 static char tzname_std[64] = "PST";
  84 static char tzname_dst[64] = "PDT";
  85 char *MSVCRT__tzname[2] = { tzname_std, tzname_dst };
  86
  87 static TIME_ZONE_INFORMATION tzi = {0};
  88 /*********************************************************************
  89  *              _tzset (MSVCRT.@)
  90  */
  91 void CDECL MSVCRT__tzset(void)
  92 {
  93     char *tz = MSVCRT_getenv("TZ");
  94     BOOL error;
  95
  96     _mlock(_TIME_LOCK);
  97     if(tz && tz[0]) {
  98         BOOL neg_zone = FALSE;
  99
 100         memset(&tzi, 0, sizeof(tzi));
 101
 102         /* Parse timezone information: tzn[+|-]hh[:mm[:ss]][dzn] */
 103         lstrcpynA(MSVCRT__tzname[0], tz, 3);
 104         tz += 3;
 105
 106         if(*tz == '-') {
 107             neg_zone = TRUE;
 108             tz++;
 109         }else if(*tz == '+') {
 110             tz++;
 111         }
 112         MSVCRT___timezone = strtol(tz, &tz, 10)*3600;
 113         if(*tz == ':') {
 114             MSVCRT___timezone += strtol(tz+1, &tz, 10)*60;
 115             if(*tz == ':')
 116                 MSVCRT___timezone += strtol(tz+1, &tz, 10);
 117         }
 118         if(neg_zone)
 119             MSVCRT___timezone = -MSVCRT___timezone;
 120
 121         MSVCRT___daylight = *tz;
 122         lstrcpynA(MSVCRT__tzname[1], tz, 3);
 123     }else if(GetTimeZoneInformation(&tzi) != TIME_ZONE_ID_INVALID) {
 124         MSVCRT___timezone = tzi.Bias*60;
 125         if(tzi.StandardDate.wMonth)
 126             MSVCRT___timezone += tzi.StandardBias*60;
 127
 128         if(tzi.DaylightDate.wMonth) {
 129             MSVCRT___daylight = 1;
 130             MSVCRT__dstbias = (tzi.DaylightBias-tzi.StandardBias)*60;
 131         }else {
 132             MSVCRT___daylight = 0;
 133             MSVCRT__dstbias = 0;
 134         }
 135
 136         if(!WideCharToMultiByte(CP_ACP, 0, tzi.StandardName, -1, MSVCRT__tzname[0],
 137                     sizeof(tzname_std), NULL, &error) || error)
 138             *MSVCRT__tzname[0] = 0;
 139         if(!WideCharToMultiByte(CP_ACP, 0, tzi.DaylightName, -1, MSVCRT__tzname[1],
 140                     sizeof(tzname_dst), NULL, &error) || error)
 141             *MSVCRT__tzname[0] = 0;
 142     }
 143     _munlock(_TIME_LOCK);
 144 }
 145
 146 static void _tzset_init(void)
 147 {
 148     static BOOL init = FALSE;
 149
 150     if(!init) {
 151         _mlock(_TIME_LOCK);
 152         if(!init) {
 153             MSVCRT__tzset();
 154             init = TRUE;
 155         }
 156         _munlock(_TIME_LOCK);
 157     }
 158 }
 159
 160 static BOOL is_dst(const SYSTEMTIME *st)
 161 {
 162     TIME_ZONE_INFORMATION tmp;
 163     SYSTEMTIME out;
 164
 165     if(!MSVCRT___daylight)
 166         return FALSE;
 167
 168     if(tzi.DaylightDate.wMonth) {
 169         tmp = tzi;
 170     }else if(st->wYear >= 2007) {
 171         memset(&tmp, 0, sizeof(tmp));
 172         tmp.StandardDate.wMonth = 11;
 173         tmp.StandardDate.wDay = 1;
 174         tmp.StandardDate.wHour = 2;
 175         tmp.DaylightDate.wMonth = 3;
 176         tmp.DaylightDate.wDay = 2;
 177         tmp.DaylightDate.wHour = 2;
 178     }else {
 179         memset(&tmp, 0, sizeof(tmp));
 180         tmp.StandardDate.wMonth = 10;
 181         tmp.StandardDate.wDay = 5;
 182         tmp.StandardDate.wHour = 2;
 183         tmp.DaylightDate.wMonth = 4;
 184         tmp.DaylightDate.wDay = 1;
 185         tmp.DaylightDate.wHour = 2;
 186     }
 187
 188     tmp.Bias = 0;
 189     tmp.StandardBias = 0;
 190     tmp.DaylightBias = MSVCRT__dstbias/60;
 191     if(!SystemTimeToTzSpecificLocalTime(&tmp, st, &out))
 192         return FALSE;
 193
 194     return memcmp(st, &out, sizeof(SYSTEMTIME));
 195 }
 196
 197 #define SECSPERDAY        86400
 198 /* 1601 to 1970 is 369 years plus 89 leap days */
 199 #define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
 200 #define TICKSPERSEC       10000000
 201 #define TICKSPERMSEC      10000
 202 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
 203
 204 static MSVCRT___time64_t mktime_helper(struct MSVCRT_tm *mstm, BOOL local)
 205 {
 206     SYSTEMTIME st;
 207     FILETIME ft;
 208     MSVCRT___time64_t ret = 0;
 209     int i;
 210     BOOL use_dst = FALSE;
 211
 212     ret = mstm->tm_year + mstm->tm_mon/12;
 213     mstm->tm_mon %= 12;
 214     if(mstm->tm_mon < 0) {
 215         mstm->tm_mon += 12;
 216         ret--;
 217     }
 218
 219     if(ret<70 || ret>1100) {
 220         *MSVCRT__errno() = MSVCRT_EINVAL;
 221         return -1;
 222     }
 223
 224     memset(&st, 0, sizeof(SYSTEMTIME));
 225     st.wDay = 1;
 226     st.wMonth = mstm->tm_mon+1;
 227     st.wYear = ret+1900;
 228
 229     if(!SystemTimeToFileTime(&st, &ft)) {
 230         *MSVCRT__errno() = MSVCRT_EINVAL;
 231         return -1;
 232     }
 233
 234     ret = ((MSVCRT___time64_t)ft.dwHighDateTime<<32)+ft.dwLowDateTime;
 235     ret += (MSVCRT___time64_t)mstm->tm_sec*TICKSPERSEC;
 236     ret += (MSVCRT___time64_t)mstm->tm_min*60*TICKSPERSEC;
 237     ret += (MSVCRT___time64_t)mstm->tm_hour*60*60*TICKSPERSEC;
 238     ret += (MSVCRT___time64_t)(mstm->tm_mday-1)*SECSPERDAY*TICKSPERSEC;
 239
 240     ft.dwLowDateTime = ret & 0xffffffff;
 241     ft.dwHighDateTime = ret >> 32;
 242     FileTimeToSystemTime(&ft, &st);
 243
 244     if(local) {
 245         _tzset_init();
 246         use_dst = is_dst(&st);
 247         if((mstm->tm_isdst<=-1 && use_dst) || (mstm->tm_isdst>=1)) {
 248             SYSTEMTIME tmp;
 249
 250             ret += (MSVCRT___time64_t)MSVCRT__dstbias*TICKSPERSEC;
 251
 252             ft.dwLowDateTime = ret & 0xffffffff;
 253             ft.dwHighDateTime = ret >> 32;
 254             FileTimeToSystemTime(&ft, &tmp);
 255
 256             if(!is_dst(&tmp)) {
 257                 st = tmp;
 258                 use_dst = FALSE;
 259             }else {
 260                 use_dst = TRUE;
 261             }
 262         }else if(mstm->tm_isdst==0 && use_dst) {
 263             ret -= (MSVCRT___time64_t)MSVCRT__dstbias*TICKSPERSEC;
 264             ft.dwLowDateTime = ret & 0xffffffff;
 265             ft.dwHighDateTime = ret >> 32;
 266             FileTimeToSystemTime(&ft, &st);
 267             ret += (MSVCRT___time64_t)MSVCRT__dstbias*TICKSPERSEC;
 268         }
 269         ret += (MSVCRT___time64_t)MSVCRT___timezone*TICKSPERSEC;
 270     }
 271
 272     mstm->tm_sec = st.wSecond;
 273     mstm->tm_min = st.wMinute;
 274     mstm->tm_hour = st.wHour;
 275     mstm->tm_mday = st.wDay;
 276     mstm->tm_mon = st.wMonth-1;
 277     mstm->tm_year = st.wYear-1900;
 278     mstm->tm_wday = st.wDayOfWeek;
 279     for(i=mstm->tm_yday=0; i<st.wMonth-1; i++)
 280         mstm->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 281     mstm->tm_yday += st.wDay-1;
 282     mstm->tm_isdst = use_dst ? 1 : 0;
 283
 284     if(ret < TICKS_1601_TO_1970) {
 285         *MSVCRT__errno() = MSVCRT_EINVAL;
 286         return -1;
 287     }
 288     ret = (ret-TICKS_1601_TO_1970)/TICKSPERSEC;
 289     return ret;
 290 }
 291
 292 /**********************************************************************
 293  *              _mktime64 (MSVCRT.@)
 294  */
 295 MSVCRT___time64_t CDECL MSVCRT__mktime64(struct MSVCRT_tm *mstm)
 296 {
 297     return mktime_helper(mstm, TRUE);
 298 }
 299
 300 /**********************************************************************
 301  *              _mktime32 (MSVCRT.@)
 302  */
 303 MSVCRT___time32_t CDECL MSVCRT__mktime32(struct MSVCRT_tm *mstm)
 304 {
 305     MSVCRT___time64_t ret = MSVCRT__mktime64( mstm );
 306     return ret == (MSVCRT___time32_t)ret ? ret : -1;
 307 }
 308
 309 /**********************************************************************
 310  *              mktime (MSVCRT.@)
 311  */
 312 #ifdef _WIN64
 313 MSVCRT___time64_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 314 {
 315     return MSVCRT__mktime64( mstm );
 316 }
 317 #else
 318 MSVCRT___time32_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 319 {
 320     return MSVCRT__mktime32( mstm );
 321 }
 322 #endif
 323
 324 /**********************************************************************
 325  *              _mkgmtime64 (MSVCRT.@)
 326  *
 327  * time->tm_isdst value is ignored
 328  */
 329 MSVCRT___time64_t CDECL MSVCRT__mkgmtime64(struct MSVCRT_tm *time)
 330 {
 331     return mktime_helper(time, FALSE);
 332 }
 333
 334 /**********************************************************************
 335  *              _mkgmtime32 (MSVCRT.@)
 336  */
 337 MSVCRT___time32_t CDECL MSVCRT__mkgmtime32(struct MSVCRT_tm *time)
 338 {
 339     MSVCRT___time64_t ret = MSVCRT__mkgmtime64(time);
 340     return ret == (MSVCRT___time32_t)ret ? ret : -1;
 341 }
 342
 343 /**********************************************************************
 344  *              _mkgmtime (MSVCRT.@)
 345  */
 346 #ifdef _WIN64
 347 MSVCRT___time64_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 348 {
 349     return MSVCRT__mkgmtime64(time);
 350 }
 351 #else
 352 MSVCRT___time32_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 353 {
 354     return MSVCRT__mkgmtime32(time);
 355 }
 356 #endif
 357
 358 /*********************************************************************
 359  *      _localtime64_s (MSVCRT.@)
 360  */
 361 int CDECL _localtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
 362 {
 363     int i;
 364     FILETIME ft;
 365     SYSTEMTIME st;
 366     ULONGLONG time;
 367
 368     if (!res || !secs || *secs < 0 || *secs > _MAX__TIME64_T)
 369     {
 370         if (res)
 371             write_invalid_msvcrt_tm(res);
 372
 373         *MSVCRT__errno() = MSVCRT_EINVAL;
 374         return MSVCRT_EINVAL;
 375     }
 376
 377     _tzset_init();
 378     time = (*secs - MSVCRT___timezone) * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 379
 380     ft.dwHighDateTime = (UINT)(time >> 32);
 381     ft.dwLowDateTime  = (UINT)time;
 382     FileTimeToSystemTime(&ft, &st);
 383
 384     res->tm_isdst = is_dst(&st) ? 1 : 0;
 385     if(res->tm_isdst) {
 386         time -= MSVCRT__dstbias * (ULONGLONG)TICKSPERSEC;
 387         ft.dwHighDateTime = (UINT)(time >> 32);
 388         ft.dwLowDateTime  = (UINT)time;
 389         FileTimeToSystemTime(&ft, &st);
 390     }
 391
 392     res->tm_sec  = st.wSecond;
 393     res->tm_min  = st.wMinute;
 394     res->tm_hour = st.wHour;
 395     res->tm_mday = st.wDay;
 396     res->tm_year = st.wYear - 1900;
 397     res->tm_mon  = st.wMonth - 1;
 398     res->tm_wday = st.wDayOfWeek;
 399     for (i = res->tm_yday = 0; i < st.wMonth - 1; i++)
 400         res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 401     res->tm_yday += st.wDay - 1;
 402
 403     return 0;
 404 }
 405
 406 /*********************************************************************
 407  *      _localtime64 (MSVCRT.@)
 408  */
 409 struct MSVCRT_tm* CDECL MSVCRT__localtime64(const MSVCRT___time64_t* secs)
 410 {
 411     thread_data_t *data = msvcrt_get_thread_data();
 412
 413     if(!data->time_buffer)
 414         data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));
 415
 416     if(_localtime64_s(data->time_buffer, secs))
 417         return NULL;
 418     return data->time_buffer;
 419 }
 420
 421 /*********************************************************************
 422  *      _localtime32 (MSVCRT.@)
 423  */
 424 struct MSVCRT_tm* CDECL MSVCRT__localtime32(const MSVCRT___time32_t* secs)
 425 {
 426     MSVCRT___time64_t secs64;
 427
 428     if(!secs)
 429         return NULL;
 430
 431     secs64 = *secs;
 432     return MSVCRT__localtime64( &secs64 );
 433 }
 434
 435 /*********************************************************************
 436  *      _localtime32_s (MSVCRT.@)
 437  */
 438 int CDECL _localtime32_s(struct MSVCRT_tm *time, const MSVCRT___time32_t *secs)
 439 {
 440     MSVCRT___time64_t secs64;
 441
 442     if (!time || !secs || *secs < 0)
 443     {
 444         if (time)
 445             write_invalid_msvcrt_tm(time);
 446
 447         *MSVCRT__errno() = MSVCRT_EINVAL;
 448         return MSVCRT_EINVAL;
 449     }
 450
 451     secs64 = *secs;
 452     return _localtime64_s(time, &secs64);
 453 }
 454
 455 /*********************************************************************
 456  *      localtime (MSVCRT.@)
 457  */
 458 #ifdef _WIN64
 459 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time64_t* secs)
 460 {
 461     return MSVCRT__localtime64( secs );
 462 }
 463 #else
 464 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time32_t* secs)
 465 {
 466     return MSVCRT__localtime32( secs );
 467 }
 468 #endif
 469
 470 /*********************************************************************
 471  *      _gmtime64 (MSVCRT.@)
 472  */
 473 int CDECL MSVCRT__gmtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
 474 {
 475     int i;
 476     FILETIME ft;
 477     SYSTEMTIME st;
 478     ULONGLONG time;
 479
 480     if (!res || !secs || *secs < 0 || *secs > _MAX__TIME64_T) {
 481         if (res) {
 482             write_invalid_msvcrt_tm(res);
 483         }
 484
 485         *MSVCRT__errno() = MSVCRT_EINVAL;
 486         return MSVCRT_EINVAL;
 487     }
 488
 489     time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 490
 491     ft.dwHighDateTime = (UINT)(time >> 32);
 492     ft.dwLowDateTime  = (UINT)time;
 493
 494     FileTimeToSystemTime(&ft, &st);
 495
 496     res->tm_sec  = st.wSecond;
 497     res->tm_min  = st.wMinute;
 498     res->tm_hour = st.wHour;
 499     res->tm_mday = st.wDay;
 500     res->tm_year = st.wYear - 1900;
 501     res->tm_mon  = st.wMonth - 1;
 502     res->tm_wday = st.wDayOfWeek;
 503     for (i = res->tm_yday = 0; i < st.wMonth - 1; i++) {
 504         res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 505     }
 506
 507     res->tm_yday += st.wDay - 1;
 508     res->tm_isdst = 0;
 509
 510     return 0;
 511 }
 512
 513 /*********************************************************************
 514  *      _gmtime64 (MSVCRT.@)
 515  */
 516 struct MSVCRT_tm* CDECL MSVCRT__gmtime64(const MSVCRT___time64_t *secs)
 517 {
 518     thread_data_t * const data = msvcrt_get_thread_data();
 519
 520     if(!data->time_buffer)
 521         data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));
 522
 523     if(MSVCRT__gmtime64_s(data->time_buffer, secs))
 524         return NULL;
 525     return data->time_buffer;
 526 }
 527
 528 /*********************************************************************
 529  *      _gmtime32_s (MSVCRT.@)
 530  */
 531 int CDECL MSVCRT__gmtime32_s(struct MSVCRT_tm *res, const MSVCRT___time32_t *secs)
 532 {
 533     MSVCRT___time64_t secs64;
 534
 535     if(secs) {
 536         secs64 = *secs;
 537         return MSVCRT__gmtime64_s(res, &secs64);
 538     }
 539     return MSVCRT__gmtime64_s(res, NULL);
 540 }
 541
 542 /*********************************************************************
 543  *      _gmtime32 (MSVCRT.@)
 544  */
 545 struct MSVCRT_tm* CDECL MSVCRT__gmtime32(const MSVCRT___time32_t* secs)
 546 {
 547     MSVCRT___time64_t secs64;
 548
 549     if(!secs)
 550         return NULL;
 551
 552     secs64 = *secs;
 553     return MSVCRT__gmtime64( &secs64 );
 554 }
 555
 556 /*********************************************************************
 557  *      gmtime (MSVCRT.@)
 558  */
 559 #ifdef _WIN64
 560 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time64_t* secs)
 561 {
 562     return MSVCRT__gmtime64( secs );
 563 }
 564 #else
 565 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time32_t* secs)
 566 {
 567     return MSVCRT__gmtime32( secs );
 568 }
 569 #endif
 570
 571 /**********************************************************************
 572  *              _strdate (MSVCRT.@)
 573  */
 574 char* CDECL MSVCRT__strdate(char* date)
 575 {
 576   static const char format[] = "MM'/'dd'/'yy";
 577
 578   GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 579
 580   return date;
 581 }
 582
 583 /**********************************************************************
 584  *              _strdate_s (MSVCRT.@)
 585  */
 586 int CDECL _strdate_s(char* date, MSVCRT_size_t size)
 587 {
 588     if(date && size)
 589         date[0] = '\0';
 590
 591     if(!date) {
 592         *MSVCRT__errno() = MSVCRT_EINVAL;
 593         return MSVCRT_EINVAL;
 594     }
 595
 596     if(size < 9) {
 597         *MSVCRT__errno() = MSVCRT_ERANGE;
 598         return MSVCRT_ERANGE;
 599     }
 600
 601     MSVCRT__strdate(date);
 602     return 0;
 603 }
 604
 605 /**********************************************************************
 606  *              _wstrdate (MSVCRT.@)
 607  */
 608 MSVCRT_wchar_t* CDECL MSVCRT__wstrdate(MSVCRT_wchar_t* date)
 609 {
 610   static const WCHAR format[] = { 'M','M','\'','/','\'','d','d','\'','/','\'','y','y',0 };
 611
 612   GetDateFormatW(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 613
 614   return date;
 615 }
 616
 617 /**********************************************************************
 618  *              _wstrdate_s (MSVCRT.@)
 619  */
 620 int CDECL _wstrdate_s(MSVCRT_wchar_t* date, MSVCRT_size_t size)
 621 {
 622     if(date && size)
 623         date[0] = '\0';
 624
 625     if(!date) {
 626         *MSVCRT__errno() = MSVCRT_EINVAL;
 627         return MSVCRT_EINVAL;
 628     }
 629
 630     if(size < 9) {
 631         *MSVCRT__errno() = MSVCRT_ERANGE;
 632         return MSVCRT_ERANGE;
 633     }
 634
 635     MSVCRT__wstrdate(date);
 636     return 0;
 637 }
 638
 639 /*********************************************************************
 640  *              _strtime (MSVCRT.@)
 641  */
 642 char* CDECL MSVCRT__strtime(char* time)
 643 {
 644   static const char format[] = "HH':'mm':'ss";
 645
 646   GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 647
 648   return time;
 649 }
 650
 651 /*********************************************************************
 652  *              _strtime_s (MSVCRT.@)
 653  */
 654 int CDECL _strtime_s(char* time, MSVCRT_size_t size)
 655 {
 656     if(time && size)
 657         time[0] = '\0';
 658
 659     if(!time) {
 660         *MSVCRT__errno() = MSVCRT_EINVAL;
 661         return MSVCRT_EINVAL;
 662     }
 663
 664     if(size < 9) {
 665         *MSVCRT__errno() = MSVCRT_ERANGE;
 666         return MSVCRT_ERANGE;
 667     }
 668
 669     MSVCRT__strtime(time);
 670     return 0;
 671 }
 672
 673 /*********************************************************************
 674  *              _wstrtime (MSVCRT.@)
 675  */
 676 MSVCRT_wchar_t* CDECL MSVCRT__wstrtime(MSVCRT_wchar_t* time)
 677 {
 678   static const WCHAR format[] = { 'H','H','\'',':','\'','m','m','\'',':','\'','s','s',0 };
 679
 680   GetTimeFormatW(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 681
 682   return time;
 683 }
 684
 685 /*********************************************************************
 686  *              _wstrtime_s (MSVCRT.@)
 687  */
 688 int CDECL _wstrtime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size)
 689 {
 690     if(time && size)
 691         time[0] = '\0';
 692
 693     if(!time) {
 694         *MSVCRT__errno() = MSVCRT_EINVAL;
 695         return MSVCRT_EINVAL;
 696     }
 697
 698     if(size < 9) {
 699         *MSVCRT__errno() = MSVCRT_ERANGE;
 700         return MSVCRT_ERANGE;
 701     }
 702
 703     MSVCRT__wstrtime(time);
 704     return 0;
 705 }
 706
 707 /*********************************************************************
 708  *              clock (MSVCRT.@)
 709  */
 710 MSVCRT_clock_t CDECL MSVCRT_clock(void)
 711 {
 712   FILETIME ftc, fte, ftk, ftu;
 713   ULONGLONG utime, ktime;
 714
 715   MSVCRT_clock_t clock;
 716
 717   GetProcessTimes(GetCurrentProcess(), &ftc, &fte, &ftk, &ftu);
 718
 719   ktime = ((ULONGLONG)ftk.dwHighDateTime << 32) | ftk.dwLowDateTime;
 720   utime = ((ULONGLONG)ftu.dwHighDateTime << 32) | ftu.dwLowDateTime;
 721
 722   clock = (utime + ktime) / (TICKSPERSEC / MSVCRT_CLOCKS_PER_SEC);
 723
 724   return clock;
 725 }
 726
 727 /*********************************************************************
 728  *              _difftime64 (MSVCRT.@)
 729  */
 730 double CDECL MSVCRT__difftime64(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 731 {
 732   return (double)(time1 - time2);
 733 }
 734
 735 /*********************************************************************
 736  *              _difftime32 (MSVCRT.@)
 737  */
 738 double CDECL MSVCRT__difftime32(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 739 {
 740   return (double)(time1 - time2);
 741 }
 742
 743 /*********************************************************************
 744  *              difftime (MSVCRT.@)
 745  */
 746 #ifdef _WIN64
 747 double CDECL MSVCRT_difftime(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 748 {
 749     return MSVCRT__difftime64( time1, time2 );
 750 }
 751 #else
 752 double CDECL MSVCRT_difftime(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 753 {
 754     return MSVCRT__difftime32( time1, time2 );
 755 }
 756 #endif
 757
 758 /*********************************************************************
 759  *              _ftime64 (MSVCRT.@)
 760  */
 761 void CDECL MSVCRT__ftime64(struct MSVCRT___timeb64 *buf)
 762 {
 763   TIME_ZONE_INFORMATION tzinfo;
 764   FILETIME ft;
 765   ULONGLONG time;
 766
 767   DWORD tzid = GetTimeZoneInformation(&tzinfo);
 768   GetSystemTimeAsFileTime(&ft);
 769
 770   time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
 771
 772   buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
 773   buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
 774   buf->timezone = tzinfo.Bias +
 775       ( tzid == TIME_ZONE_ID_STANDARD ? tzinfo.StandardBias :
 776       ( tzid == TIME_ZONE_ID_DAYLIGHT ? tzinfo.DaylightBias : 0 ));
 777   buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
 778 }
 779
 780 /*********************************************************************
 781  *              _ftime64_s (MSVCRT.@)
 782  */
 783 int CDECL MSVCRT__ftime64_s(struct MSVCRT___timeb64 *buf)
 784 {
 785     if (!MSVCRT_CHECK_PMT( buf != NULL )) return MSVCRT_EINVAL;
 786     MSVCRT__ftime64(buf);
 787     return 0;
 788 }
 789
 790 /*********************************************************************
 791  *              _ftime32 (MSVCRT.@)
 792  */
 793 void CDECL MSVCRT__ftime32(struct MSVCRT___timeb32 *buf)
 794 {
 795     struct MSVCRT___timeb64 buf64;
 796
 797     MSVCRT__ftime64( &buf64 );
 798     buf->time     = buf64.time;
 799     buf->millitm  = buf64.millitm;
 800     buf->timezone = buf64.timezone;
 801     buf->dstflag  = buf64.dstflag;
 802 }
 803
 804 /*********************************************************************
 805  *              _ftime32_s (MSVCRT.@)
 806  */
 807 int CDECL MSVCRT__ftime32_s(struct MSVCRT___timeb32 *buf)
 808 {
 809     if (!MSVCRT_CHECK_PMT( buf != NULL )) return MSVCRT_EINVAL;
 810     MSVCRT__ftime32(buf);
 811     return 0;
 812 }
 813
 814 /*********************************************************************
 815  *              _ftime (MSVCRT.@)
 816  */
 817 #ifdef _WIN64
 818 void CDECL MSVCRT__ftime(struct MSVCRT___timeb64 *buf)
 819 {
 820     MSVCRT__ftime64( buf );
 821 }
 822 #else
 823 void CDECL MSVCRT__ftime(struct MSVCRT___timeb32 *buf)
 824 {
 825     MSVCRT__ftime32( buf );
 826 }
 827 #endif
 828
 829 /*********************************************************************
 830  *              _time64 (MSVCRT.@)
 831  */
 832 MSVCRT___time64_t CDECL MSVCRT__time64(MSVCRT___time64_t *buf)
 833 {
 834     MSVCRT___time64_t curtime;
 835     struct MSVCRT___timeb64 tb;
 836
 837     MSVCRT__ftime64(&tb);
 838
 839     curtime = tb.time;
 840     return buf ? *buf = curtime : curtime;
 841 }
 842
 843 /*********************************************************************
 844  *              _time32 (MSVCRT.@)
 845  */
 846 MSVCRT___time32_t CDECL MSVCRT__time32(MSVCRT___time32_t *buf)
 847 {
 848     MSVCRT___time32_t curtime;
 849     struct MSVCRT___timeb64 tb;
 850
 851     MSVCRT__ftime64(&tb);
 852
 853     curtime = tb.time;
 854     return buf ? *buf = curtime : curtime;
 855 }
 856
 857 /*********************************************************************
 858  *              time (MSVCRT.@)
 859  */
 860 #ifdef _WIN64
 861 MSVCRT___time64_t CDECL MSVCRT_time(MSVCRT___time64_t* buf)
 862 {
 863     return MSVCRT__time64( buf );
 864 }
 865 #else
 866 MSVCRT___time32_t CDECL MSVCRT_time(MSVCRT___time32_t* buf)
 867 {
 868     return MSVCRT__time32( buf );
 869 }
 870 #endif
 871
 872 /*********************************************************************
 873  *              __p_daylight (MSVCRT.@)
 874  */
 875 int * CDECL MSVCRT___p__daylight(void)
 876 {
 877         return &MSVCRT___daylight;
 878 }
 879
 880 /*********************************************************************
 881  *              __p_dstbias (MSVCRT.@)
 882  */
 883 int * CDECL __p__dstbias(void)
 884 {
 885     return &MSVCRT__dstbias;
 886 }
 887
 888 /*********************************************************************
 889  *              __p_timezone (MSVCRT.@)
 890  */
 891 MSVCRT_long * CDECL MSVCRT___p__timezone(void)
 892 {
 893         return &MSVCRT___timezone;
 894 }
 895
 896 /*********************************************************************
 897  *              _get_tzname (MSVCRT.@)
 898  */
 899 int CDECL MSVCRT__get_tzname(MSVCRT_size_t *ret, char *buf, MSVCRT_size_t bufsize, int index)
 900 {
 901     char *timezone;
 902
 903     switch(index)
 904     {
 905     case 0:
 906         timezone = tzname_std;
 907         break;
 908     case 1:
 909         timezone = tzname_dst;
 910         break;
 911     default:
 912         *MSVCRT__errno() = MSVCRT_EINVAL;
 913         return MSVCRT_EINVAL;
 914     }
 915
 916     if(!ret || (!buf && bufsize > 0) || (buf && !bufsize))
 917     {
 918         *MSVCRT__errno() = MSVCRT_EINVAL;
 919         return MSVCRT_EINVAL;
 920     }
 921
 922     *ret = strlen(timezone)+1;
 923     if(!buf && !bufsize)
 924         return 0;
 925
 926     strcpy(buf, timezone);
 927     return 0;
 928 }
 929
 930 /*********************************************************************
 931  *              __p_tzname (MSVCRT.@)
 932  */
 933 char ** CDECL __p__tzname(void)
 934 {
 935         return MSVCRT__tzname;
 936 }
 937
 938 static inline BOOL strftime_date(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
 939         BOOL alternate, const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
 940 {
 941     char *format;
 942     SYSTEMTIME st;
 943     MSVCRT_size_t ret;
 944
 945     st.wYear = mstm->tm_year + 1900;
 946     st.wMonth = mstm->tm_mon + 1;
 947     st.wDayOfWeek = mstm->tm_wday;
 948     st.wDay = mstm->tm_mday;
 949     st.wHour = mstm->tm_hour;
 950     st.wMinute = mstm->tm_min;
 951     st.wSecond = mstm->tm_sec;
 952     st.wMilliseconds = 0;
 953
 954     format = alternate ? time_data->str.names.date : time_data->str.names.short_date;
 955     ret = GetDateFormatA(time_data->lcid, 0, &st, format, NULL, 0);
 956     if(ret && ret<max-*pos)
 957         ret = GetDateFormatA(time_data->lcid, 0, &st, format, str+*pos, max-*pos);
 958     if(!ret) {
 959         *str = 0;
 960         *MSVCRT__errno() = MSVCRT_EINVAL;
 961         return FALSE;
 962     }else if(ret > max-*pos) {
 963         *str = 0;
 964         *MSVCRT__errno() = MSVCRT_ERANGE;
 965         return FALSE;
 966     }
 967     *pos += ret-1;
 968     return TRUE;
 969 }
 970
 971 static inline BOOL strftime_time(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
 972         const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
 973 {
 974     SYSTEMTIME st;
 975     MSVCRT_size_t ret;
 976
 977     st.wYear = mstm->tm_year + 1900;
 978     st.wMonth = mstm->tm_mon + 1;
 979     st.wDayOfWeek = mstm->tm_wday;
 980     st.wDay = mstm->tm_mday;
 981     st.wHour = mstm->tm_hour;
 982     st.wMinute = mstm->tm_min;
 983     st.wSecond = mstm->tm_sec;
 984     st.wMilliseconds = 0;
 985
 986     ret = GetTimeFormatA(time_data->lcid, 0, &st, time_data->str.names.time, NULL, 0);
 987     if(ret && ret<max-*pos)
 988         ret = GetTimeFormatA(time_data->lcid, 0, &st, time_data->str.names.time,
 989                 str+*pos, max-*pos);
 990     if(!ret) {
 991         *str = 0;
 992         *MSVCRT__errno() = MSVCRT_EINVAL;
 993         return FALSE;
 994     }else if(ret > max-*pos) {
 995         *str = 0;
 996         *MSVCRT__errno() = MSVCRT_ERANGE;
 997         return FALSE;
 998     }
 999     *pos += ret-1;
1000     return TRUE;
1001 }
1002
1003 static inline BOOL strftime_str(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max, char *src)
1004 {
1005     MSVCRT_size_t len = strlen(src);
1006     if(len > max-*pos) {
1007         *str = 0;
1008         *MSVCRT__errno() = MSVCRT_ERANGE;
1009         return FALSE;
1010     }
1011
1012     memcpy(str+*pos, src, len);
1013     *pos += len;
1014     return TRUE;
1015 }
1016
1017 static inline BOOL strftime_int(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
1018         int src, int prec, int l, int h)
1019 {
1020     MSVCRT_size_t len;
1021
1022     if(src<l || src>h) {
1023         *str = 0;
1024         *MSVCRT__errno() = MSVCRT_EINVAL;
1025         return FALSE;
1026     }
1027
1028     len = MSVCRT__snprintf(str+*pos, max-*pos, "%0*d", prec, src);
1029     if(len == -1) {
1030         *str = 0;
1031         *MSVCRT__errno() = MSVCRT_ERANGE;
1032         return FALSE;
1033     }
1034
1035     *pos += len;
1036     return TRUE;
1037 }
1038
1039 /*********************************************************************
1040  *              _Strftime (MSVCRT.@)
1041  */
1042 MSVCRT_size_t CDECL _Strftime(char *str, MSVCRT_size_t max, const char *format,
1043         const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
1044 {
1045     MSVCRT_size_t ret, tmp;
1046     BOOL alternate;
1047
1048     TRACE("(%p %ld %s %p %p)\n", str, max, format, mstm, time_data);
1049
1050     if(!str || !format) {
1051         if(str && max)
1052             *str = 0;
1053         *MSVCRT__errno() = MSVCRT_EINVAL;
1054         return 0;
1055     }
1056
1057     if(!time_data)
1058         time_data = get_locinfo()->lc_time_curr;
1059
1060     for(ret=0; *format && ret<max; format++) {
1061         if(*format != '%') {
1062             str[ret++] = *format;
1063             continue;
1064         }
1065
1066         format++;
1067         if(*format == '#') {
1068             alternate = TRUE;
1069             format++;
1070         }else {
1071             alternate = FALSE;
1072         }
1073
1074         if(!mstm)
1075             goto einval_error;
1076
1077         switch(*format) {
1078         case 'c':
1079             if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
1080                 return 0;
1081             if(ret < max)
1082                 str[ret++] = ' ';
1083             if(!strftime_time(str, &ret, max, mstm, time_data))
1084                 return 0;
1085             break;
1086         case 'x':
1087             if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
1088                 return 0;
1089             break;
1090         case 'X':
1091             if(!strftime_time(str, &ret, max, mstm, time_data))
1092                 return 0;
1093             break;
1094         case 'a':
1095             if(mstm->tm_wday<0 || mstm->tm_wday>6)
1096                 goto einval_error;
1097             if(!strftime_str(str, &ret, max, time_data->str.names.short_wday[mstm->tm_wday]))
1098                 return 0;
1099             break;
1100         case 'A':
1101             if(mstm->tm_wday<0 || mstm->tm_wday>6)
1102                 goto einval_error;
1103             if(!strftime_str(str, &ret, max, time_data->str.names.wday[mstm->tm_wday]))
1104                 return 0;
1105             break;
1106         case 'b':
1107             if(mstm->tm_mon<0 || mstm->tm_mon>11)
1108                 goto einval_error;
1109             if(!strftime_str(str, &ret, max, time_data->str.names.short_mon[mstm->tm_mon]))
1110                 return 0;
1111             break;
1112         case 'B':
1113             if(mstm->tm_mon<0 || mstm->tm_mon>11)
1114                 goto einval_error;
1115             if(!strftime_str(str, &ret, max, time_data->str.names.mon[mstm->tm_mon]))
1116                 return 0;
1117             break;
1118         case 'd':
1119             if(!strftime_int(str, &ret, max, mstm->tm_mday, alternate ? 0 : 2, 0, 31))
1120                 return 0;
1121             break;
1122         case 'H':
1123             if(!strftime_int(str, &ret, max, mstm->tm_hour, alternate ? 0 : 2, 0, 23))
1124                 return 0;
1125             break;
1126         case 'I':
1127             tmp = mstm->tm_hour;
1128             if(tmp > 12)
1129                 tmp -= 12;
1130             else if(!tmp)
1131                 tmp = 12;
1132             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 1, 12))
1133                 return 0;
1134             break;
1135         case 'j':
1136             if(!strftime_int(str, &ret, max, mstm->tm_yday+1, alternate ? 0 : 3, 1, 366))
1137                 return 0;
1138             break;
1139         case 'm':
1140             if(!strftime_int(str, &ret, max, mstm->tm_mon+1, alternate ? 0 : 2, 1, 12))
1141                 return 0;
1142             break;
1143         case 'M':
1144             if(!strftime_int(str, &ret, max, mstm->tm_min, alternate ? 0 : 2, 0, 59))
1145                 return 0;
1146             break;
1147         case 'p':
1148             if(mstm->tm_hour<0 || mstm->tm_hour>23)
1149                 goto einval_error;
1150             if(!strftime_str(str, &ret, max, mstm->tm_hour<12 ?
1151                         time_data->str.names.am : time_data->str.names.pm))
1152                 return 0;
1153             break;
1154         case 'S':
1155             if(!strftime_int(str, &ret, max, mstm->tm_sec, alternate ? 0 : 2, 0, 59))
1156                 return 0;
1157             break;
1158         case 'w':
1159             if(!strftime_int(str, &ret, max, mstm->tm_wday, 0, 0, 6))
1160                 return 0;
1161             break;
1162         case 'y':
1163             if(!strftime_int(str, &ret, max, mstm->tm_year%100, alternate ? 0 : 2, 0, 99))
1164                 return 0;
1165             break;
1166         case 'Y':
1167             tmp = 1900+mstm->tm_year;
1168             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 4, 0, 9999))
1169                 return 0;
1170             break;
1171         case 'z':
1172         case 'Z':
1173             MSVCRT__tzset();
1174             if(MSVCRT__get_tzname(&tmp, str+ret, max-ret, mstm->tm_isdst ? 1 : 0))
1175                 return 0;
1176             ret += tmp;
1177             break;
1178         case 'U':
1179         case 'W':
1180             if(mstm->tm_wday<0 || mstm->tm_wday>6 || mstm->tm_yday<0 || mstm->tm_yday>365)
1181                 goto einval_error;
1182             if(*format == 'U')
1183                 tmp = mstm->tm_wday;
1184             else if(!mstm->tm_wday)
1185                 tmp = 6;
1186             else
1187                 tmp = mstm->tm_wday-1;
1188
1189             tmp = mstm->tm_yday/7 + (tmp<=mstm->tm_yday%7);
1190             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 0, 53))
1191                 return 0;
1192             break;
1193         case '%':
1194             str[ret++] = '%';
1195             break;
1196         default:
1197             WARN("unknown format %c\n", *format);
1198             goto einval_error;
1199         }
1200     }
1201
1202     if(ret == max) {
1203         if(max)
1204             *str = 0;
1205         *MSVCRT__errno() = MSVCRT_ERANGE;
1206         return 0;
1207     }
1208
1209     str[ret] = 0;
1210     return ret;
1211
1212 einval_error:
1213     *str = 0;
1214     *MSVCRT__errno() = MSVCRT_EINVAL;
1215     return 0;
1216 }
1217
1218 /*********************************************************************
1219  *              strftime (MSVCRT.@)
1220  */
1221 MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
1222                                      const struct MSVCRT_tm *mstm )
1223 {
1224     return _Strftime(str, max, format, mstm, NULL);
1225 }
1226
1227 /*********************************************************************
1228  *              wcsftime (MSVCRT.@)
1229  */
1230 MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
1231                                      const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
1232 {
1233     char *s, *fmt;
1234     MSVCRT_size_t len;
1235
1236     TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
1237
1238     len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
1239     if (!(fmt = MSVCRT_malloc( len ))) return 0;
1240     WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );
1241
1242     if ((s = MSVCRT_malloc( max*4 )))
1243     {
1244         if (!MSVCRT_strftime( s, max*4, fmt, mstm )) s[0] = 0;
1245         len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
1246         if (len) len--;
1247         MSVCRT_free( s );
1248     }
1249     else len = 0;
1250
1251     MSVCRT_free( fmt );
1252     return len;
1253 }
1254
1255 static char* asctime_buf(char *buf, const struct MSVCRT_tm *mstm)
1256 {
1257     static const char wday[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
1258     static const char month[12][4] = {"Jan", "Feb", "Mar", "Apr", "May",
1259         "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
1260
1261     if (mstm->tm_sec<0 || mstm->tm_sec>59
1262             || mstm->tm_min<0 || mstm->tm_min>59
1263             || mstm->tm_hour<0 || mstm->tm_hour>23
1264             || mstm->tm_mon<0 || mstm->tm_mon>11
1265             || mstm->tm_wday<0 || mstm->tm_wday>6
1266             || mstm->tm_year<0 || mstm->tm_mday<0
1267             || mstm->tm_mday>MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon]) {
1268         *MSVCRT__errno() = MSVCRT_EINVAL;
1269         return NULL;
1270     }
1271
1272     MSVCRT__snprintf(buf, 26, "%s %s %02d %02d:%02d:%02d %c%03d\n", wday[mstm->tm_wday],
1273             month[mstm->tm_mon], mstm->tm_mday, mstm->tm_hour, mstm->tm_min,
1274             mstm->tm_sec, '1'+(mstm->tm_year+900)/1000, (900+mstm->tm_year)%1000);
1275     return buf;
1276 }
1277
1278 /*********************************************************************
1279  *              asctime (MSVCRT.@)
1280  */
1281 char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
1282 {
1283     thread_data_t *data = msvcrt_get_thread_data();
1284
1285     /* asctime returns date in format that always has exactly 26 characters */
1286     if (!data->asctime_buffer) {
1287         data->asctime_buffer = MSVCRT_malloc(26);
1288         if (!data->asctime_buffer) {
1289             *MSVCRT__errno() = MSVCRT_ENOMEM;
1290             return NULL;
1291         }
1292     }
1293
1294     return asctime_buf(data->asctime_buffer, mstm);
1295 }
1296
1297 /*********************************************************************
1298  *      asctime_s (MSVCRT.@)
1299  */
1300 int CDECL MSVCRT_asctime_s(char* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
1301 {
1302     if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1303     if (size) time[0] = 0;
1304     if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
1305     if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
1306     if (!MSVCRT_CHECK_PMT(mstm->tm_sec >= 0 && mstm->tm_sec < 60)) return MSVCRT_EINVAL;
1307     if (!MSVCRT_CHECK_PMT(mstm->tm_min >= 0 && mstm->tm_min < 60)) return MSVCRT_EINVAL;
1308     if (!MSVCRT_CHECK_PMT(mstm->tm_hour >= 0 && mstm->tm_hour < 24)) return MSVCRT_EINVAL;
1309     if (!MSVCRT_CHECK_PMT(mstm->tm_mon >= 0 && mstm->tm_mon < 12)) return MSVCRT_EINVAL;
1310     if (!MSVCRT_CHECK_PMT(mstm->tm_wday >= 0 && mstm->tm_wday < 7)) return MSVCRT_EINVAL;
1311     if (!MSVCRT_CHECK_PMT(mstm->tm_year >= 0)) return MSVCRT_EINVAL;
1312     if (!MSVCRT_CHECK_PMT(mstm->tm_mday >= 0)) return MSVCRT_EINVAL;
1313     if (!MSVCRT_CHECK_PMT(mstm->tm_mday <= MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon])) return MSVCRT_EINVAL;
1314
1315     asctime_buf(time, mstm);
1316     return 0;
1317 }
1318
1319 /*********************************************************************
1320  *              _wasctime (MSVCRT.@)
1321  */
1322 MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
1323 {
1324     thread_data_t *data = msvcrt_get_thread_data();
1325     char buffer[26];
1326
1327     if(!data->wasctime_buffer) {
1328         data->wasctime_buffer = MSVCRT_malloc(26*sizeof(MSVCRT_wchar_t));
1329         if(!data->wasctime_buffer) {
1330             *MSVCRT__errno() = MSVCRT_ENOMEM;
1331             return NULL;
1332         }
1333     }
1334
1335     if(!asctime_buf(buffer, mstm))
1336         return NULL;
1337
1338     MultiByteToWideChar(CP_ACP, 0, buffer, -1, data->wasctime_buffer, 26);
1339     return data->wasctime_buffer;
1340 }
1341
1342 /*********************************************************************
1343  *      _wasctime_s (MSVCRT.@)
1344  */
1345 int CDECL MSVCRT__wasctime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
1346 {
1347     char buffer[26];
1348     int ret;
1349
1350     if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1351     if (size) time[0] = 0;
1352     if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
1353     if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
1354
1355     ret = MSVCRT_asctime_s(buffer, sizeof(buffer), mstm);
1356     if(!ret)
1357         return ret;
1358     MultiByteToWideChar(CP_ACP, 0, buffer, -1, time, size);
1359     return 0;
1360 }
1361
1362 /*********************************************************************
1363  *              _ctime64 (MSVCRT.@)
1364  */
1365 char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
1366 {
1367     struct MSVCRT_tm *t;
1368     t = MSVCRT__localtime64( time );
1369     if (!t) return NULL;
1370     return MSVCRT_asctime( t );
1371 }
1372
1373 /*********************************************************************
1374  *              _ctime64_s (MSVCRT.@)
1375  */
1376 int CDECL MSVCRT__ctime64_s(char *res, MSVCRT_size_t len, const MSVCRT___time64_t *time)
1377 {
1378     struct MSVCRT_tm *t;
1379
1380     if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
1381     if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
1382     res[0] = '\0';
1383     if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
1384     if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;
1385
1386     t = MSVCRT__localtime64( time );
1387     strcpy( res, MSVCRT_asctime( t ) );
1388     return 0;
1389 }
1390
1391 /*********************************************************************
1392  *              _ctime32 (MSVCRT.@)
1393  */
1394 char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
1395 {
1396     struct MSVCRT_tm *t;
1397     t = MSVCRT__localtime32( time );
1398     if (!t) return NULL;
1399     return MSVCRT_asctime( t );
1400 }
1401
1402 /*********************************************************************
1403  *              _ctime32_s (MSVCRT.@)
1404  */
1405 int CDECL MSVCRT__ctime32_s(char *res, MSVCRT_size_t len, const MSVCRT___time32_t *time)
1406 {
1407     struct MSVCRT_tm *t;
1408
1409     if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
1410     if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
1411     res[0] = '\0';
1412     if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
1413     if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;
1414
1415     t = MSVCRT__localtime32( time );
1416     strcpy( res, MSVCRT_asctime( t ) );
1417     return 0;
1418 }
1419
1420 /*********************************************************************
1421  *              ctime (MSVCRT.@)
1422  */
1423 #ifdef _WIN64
1424 char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
1425 {
1426     return MSVCRT__ctime64( time );
1427 }
1428 #else
1429 char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
1430 {
1431     return MSVCRT__ctime32( time );
1432 }
1433 #endif
1434
1435 /*********************************************************************
1436  *              _wctime64 (MSVCRT.@)
1437  */
1438 MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
1439 {
1440     return MSVCRT__wasctime( MSVCRT__localtime64(time) );
1441 }
1442
1443 /*********************************************************************
1444  *              _wctime32 (MSVCRT.@)
1445  */
1446 MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
1447 {
1448     return MSVCRT__wasctime( MSVCRT__localtime32(time) );
1449 }
1450
1451 /*********************************************************************
1452  *              _wctime (MSVCRT.@)
1453  */
1454 #ifdef _WIN64
1455 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
1456 {
1457     return MSVCRT__wctime64( time );
1458 }
1459 #else
1460 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
1461 {
1462     return MSVCRT__wctime32( time );
1463 }
1464 #endif