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 "winternl.h"
  34 #include "wine/debug.h"
  35 #include "wine/unicode.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  38
  39 static const int MonthLengths[2][12] =
  40 {
  41     { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
  42     { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
  43 };
  44
  45 static inline BOOL IsLeapYear(int Year)
  46 {
  47     return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
  48 }
  49
  50 static inline void write_invalid_msvcrt_tm( struct MSVCRT_tm *tm )
  51 {
  52     tm->tm_sec = -1;
  53     tm->tm_min = -1;
  54     tm->tm_hour = -1;
  55     tm->tm_mday = -1;
  56     tm->tm_mon = -1;
  57     tm->tm_year = -1;
  58     tm->tm_wday = -1;
  59     tm->tm_yday = -1;
  60     tm->tm_isdst = -1;
  61 }
  62
  63 /*********************************************************************
  64  *              _daylight (MSVCRT.@)
  65  */
  66 int MSVCRT___daylight = 1;
  67
  68 /*********************************************************************
  69  *              _timezone (MSVCRT.@)
  70  */
  71 MSVCRT_long MSVCRT___timezone = 28800;
  72
  73 /*********************************************************************
  74  *              _dstbias (MSVCRT.@)
  75  */
  76 int MSVCRT__dstbias = -3600;
  77
  78 /*********************************************************************
  79  *              _tzname (MSVCRT.@)
  80  * NOTES
  81  *  Some apps (notably Mozilla) insist on writing to these, so the buffer
  82  *  must be large enough.
  83  */
  84 static char tzname_std[64] = "PST";
  85 static char tzname_dst[64] = "PDT";
  86 char *MSVCRT__tzname[2] = { tzname_std, tzname_dst };
  87
  88 static TIME_ZONE_INFORMATION tzi = {0};
  89 /*********************************************************************
  90  *              _tzset (MSVCRT.@)
  91  */
  92 void CDECL MSVCRT__tzset(void)
  93 {
  94     char *tz = MSVCRT_getenv("TZ");
  95     BOOL error;
  96
  97     _mlock(_TIME_LOCK);
  98     if(tz && tz[0]) {
  99         BOOL neg_zone = FALSE;
 100
 101         memset(&tzi, 0, sizeof(tzi));
 102
 103         /* Parse timezone information: tzn[+|-]hh[:mm[:ss]][dzn] */
 104         lstrcpynA(MSVCRT__tzname[0], tz, 3);
 105         tz += 3;
 106
 107         if(*tz == '-') {
 108             neg_zone = TRUE;
 109             tz++;
 110         }else if(*tz == '+') {
 111             tz++;
 112         }
 113         MSVCRT___timezone = strtol(tz, &tz, 10)*3600;
 114         if(*tz == ':') {
 115             MSVCRT___timezone += strtol(tz+1, &tz, 10)*60;
 116             if(*tz == ':')
 117                 MSVCRT___timezone += strtol(tz+1, &tz, 10);
 118         }
 119         if(neg_zone)
 120             MSVCRT___timezone = -MSVCRT___timezone;
 121
 122         MSVCRT___daylight = *tz;
 123         lstrcpynA(MSVCRT__tzname[1], tz, 3);
 124     }else if(GetTimeZoneInformation(&tzi) != TIME_ZONE_ID_INVALID) {
 125         MSVCRT___timezone = tzi.Bias*60;
 126         if(tzi.StandardDate.wMonth)
 127             MSVCRT___timezone += tzi.StandardBias*60;
 128
 129         if(tzi.DaylightDate.wMonth) {
 130             MSVCRT___daylight = 1;
 131             MSVCRT__dstbias = (tzi.DaylightBias-tzi.StandardBias)*60;
 132         }else {
 133             MSVCRT___daylight = 0;
 134             MSVCRT__dstbias = 0;
 135         }
 136
 137         if(!WideCharToMultiByte(CP_ACP, 0, tzi.StandardName, -1, MSVCRT__tzname[0],
 138                     sizeof(tzname_std), NULL, &error) || error)
 139             *MSVCRT__tzname[0] = 0;
 140         if(!WideCharToMultiByte(CP_ACP, 0, tzi.DaylightName, -1, MSVCRT__tzname[1],
 141                     sizeof(tzname_dst), NULL, &error) || error)
 142             *MSVCRT__tzname[0] = 0;
 143     }
 144     _munlock(_TIME_LOCK);
 145 }
 146
 147 static void _tzset_init(void)
 148 {
 149     static BOOL init = FALSE;
 150
 151     if(!init) {
 152         _mlock(_TIME_LOCK);
 153         if(!init) {
 154             MSVCRT__tzset();
 155             init = TRUE;
 156         }
 157         _munlock(_TIME_LOCK);
 158     }
 159 }
 160
 161 static BOOL is_dst(const SYSTEMTIME *st)
 162 {
 163     TIME_ZONE_INFORMATION tmp;
 164     SYSTEMTIME out;
 165
 166     if(!MSVCRT___daylight)
 167         return FALSE;
 168
 169     if(tzi.DaylightDate.wMonth) {
 170         tmp = tzi;
 171     }else if(st->wYear >= 2007) {
 172         memset(&tmp, 0, sizeof(tmp));
 173         tmp.StandardDate.wMonth = 11;
 174         tmp.StandardDate.wDay = 1;
 175         tmp.StandardDate.wHour = 2;
 176         tmp.DaylightDate.wMonth = 3;
 177         tmp.DaylightDate.wDay = 2;
 178         tmp.DaylightDate.wHour = 2;
 179     }else {
 180         memset(&tmp, 0, sizeof(tmp));
 181         tmp.StandardDate.wMonth = 10;
 182         tmp.StandardDate.wDay = 5;
 183         tmp.StandardDate.wHour = 2;
 184         tmp.DaylightDate.wMonth = 4;
 185         tmp.DaylightDate.wDay = 1;
 186         tmp.DaylightDate.wHour = 2;
 187     }
 188
 189     tmp.Bias = 0;
 190     tmp.StandardBias = 0;
 191     tmp.DaylightBias = MSVCRT__dstbias/60;
 192     if(!SystemTimeToTzSpecificLocalTime(&tmp, st, &out))
 193         return FALSE;
 194
 195     return memcmp(st, &out, sizeof(SYSTEMTIME));
 196 }
 197
 198 #define SECSPERDAY        86400
 199 /* 1601 to 1970 is 369 years plus 89 leap days */
 200 #define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
 201 #define TICKSPERSEC       10000000
 202 #define TICKSPERMSEC      10000
 203 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
 204
 205 static MSVCRT___time64_t mktime_helper(struct MSVCRT_tm *mstm, BOOL local)
 206 {
 207     SYSTEMTIME st;
 208     FILETIME ft;
 209     MSVCRT___time64_t ret = 0;
 210     int i;
 211     BOOL use_dst = FALSE;
 212
 213     ret = mstm->tm_year + mstm->tm_mon/12;
 214     mstm->tm_mon %= 12;
 215     if(mstm->tm_mon < 0) {
 216         mstm->tm_mon += 12;
 217         ret--;
 218     }
 219
 220     if(ret<70 || ret>1100) {
 221         *MSVCRT__errno() = MSVCRT_EINVAL;
 222         return -1;
 223     }
 224
 225     memset(&st, 0, sizeof(SYSTEMTIME));
 226     st.wDay = 1;
 227     st.wMonth = mstm->tm_mon+1;
 228     st.wYear = ret+1900;
 229
 230     if(!SystemTimeToFileTime(&st, &ft)) {
 231         *MSVCRT__errno() = MSVCRT_EINVAL;
 232         return -1;
 233     }
 234
 235     ret = ((MSVCRT___time64_t)ft.dwHighDateTime<<32)+ft.dwLowDateTime;
 236     ret += (MSVCRT___time64_t)mstm->tm_sec*TICKSPERSEC;
 237     ret += (MSVCRT___time64_t)mstm->tm_min*60*TICKSPERSEC;
 238     ret += (MSVCRT___time64_t)mstm->tm_hour*60*60*TICKSPERSEC;
 239     ret += (MSVCRT___time64_t)(mstm->tm_mday-1)*SECSPERDAY*TICKSPERSEC;
 240
 241     ft.dwLowDateTime = ret & 0xffffffff;
 242     ft.dwHighDateTime = ret >> 32;
 243     FileTimeToSystemTime(&ft, &st);
 244
 245     if(local) {
 246         _tzset_init();
 247         use_dst = is_dst(&st);
 248         if((mstm->tm_isdst<=-1 && use_dst) || (mstm->tm_isdst>=1)) {
 249             SYSTEMTIME tmp;
 250
 251             ret += (MSVCRT___time64_t)MSVCRT__dstbias*TICKSPERSEC;
 252
 253             ft.dwLowDateTime = ret & 0xffffffff;
 254             ft.dwHighDateTime = ret >> 32;
 255             FileTimeToSystemTime(&ft, &tmp);
 256
 257             if(!is_dst(&tmp)) {
 258                 st = tmp;
 259                 use_dst = FALSE;
 260             }else {
 261                 use_dst = TRUE;
 262             }
 263         }else if(mstm->tm_isdst==0 && use_dst) {
 264             ret -= (MSVCRT___time64_t)MSVCRT__dstbias*TICKSPERSEC;
 265             ft.dwLowDateTime = ret & 0xffffffff;
 266             ft.dwHighDateTime = ret >> 32;
 267             FileTimeToSystemTime(&ft, &st);
 268             ret += (MSVCRT___time64_t)MSVCRT__dstbias*TICKSPERSEC;
 269         }
 270         ret += (MSVCRT___time64_t)MSVCRT___timezone*TICKSPERSEC;
 271     }
 272
 273     mstm->tm_sec = st.wSecond;
 274     mstm->tm_min = st.wMinute;
 275     mstm->tm_hour = st.wHour;
 276     mstm->tm_mday = st.wDay;
 277     mstm->tm_mon = st.wMonth-1;
 278     mstm->tm_year = st.wYear-1900;
 279     mstm->tm_wday = st.wDayOfWeek;
 280     for(i=mstm->tm_yday=0; i<st.wMonth-1; i++)
 281         mstm->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 282     mstm->tm_yday += st.wDay-1;
 283     mstm->tm_isdst = use_dst ? 1 : 0;
 284
 285     if(ret < TICKS_1601_TO_1970) {
 286         *MSVCRT__errno() = MSVCRT_EINVAL;
 287         return -1;
 288     }
 289     ret = (ret-TICKS_1601_TO_1970)/TICKSPERSEC;
 290     return ret;
 291 }
 292
 293 /**********************************************************************
 294  *              _mktime64 (MSVCRT.@)
 295  */
 296 MSVCRT___time64_t CDECL MSVCRT__mktime64(struct MSVCRT_tm *mstm)
 297 {
 298     return mktime_helper(mstm, TRUE);
 299 }
 300
 301 /**********************************************************************
 302  *              _mktime32 (MSVCRT.@)
 303  */
 304 MSVCRT___time32_t CDECL MSVCRT__mktime32(struct MSVCRT_tm *mstm)
 305 {
 306     MSVCRT___time64_t ret = MSVCRT__mktime64( mstm );
 307     return ret == (MSVCRT___time32_t)ret ? ret : -1;
 308 }
 309
 310 /**********************************************************************
 311  *              mktime (MSVCRT.@)
 312  */
 313 #ifdef _WIN64
 314 MSVCRT___time64_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 315 {
 316     return MSVCRT__mktime64( mstm );
 317 }
 318 #else
 319 MSVCRT___time32_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 320 {
 321     return MSVCRT__mktime32( mstm );
 322 }
 323 #endif
 324
 325 /**********************************************************************
 326  *              _mkgmtime64 (MSVCRT.@)
 327  *
 328  * time->tm_isdst value is ignored
 329  */
 330 MSVCRT___time64_t CDECL MSVCRT__mkgmtime64(struct MSVCRT_tm *time)
 331 {
 332     return mktime_helper(time, FALSE);
 333 }
 334
 335 /**********************************************************************
 336  *              _mkgmtime32 (MSVCRT.@)
 337  */
 338 MSVCRT___time32_t CDECL MSVCRT__mkgmtime32(struct MSVCRT_tm *time)
 339 {
 340     MSVCRT___time64_t ret = MSVCRT__mkgmtime64(time);
 341     return ret == (MSVCRT___time32_t)ret ? ret : -1;
 342 }
 343
 344 /**********************************************************************
 345  *              _mkgmtime (MSVCRT.@)
 346  */
 347 #ifdef _WIN64
 348 MSVCRT___time64_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 349 {
 350     return MSVCRT__mkgmtime64(time);
 351 }
 352 #else
 353 MSVCRT___time32_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 354 {
 355     return MSVCRT__mkgmtime32(time);
 356 }
 357 #endif
 358
 359 /*********************************************************************
 360  *      _localtime64_s (MSVCRT.@)
 361  */
 362 int CDECL _localtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
 363 {
 364     int i;
 365     FILETIME ft;
 366     SYSTEMTIME st;
 367     ULONGLONG time;
 368
 369     if (!res || !secs || *secs < 0 || *secs > _MAX__TIME64_T)
 370     {
 371         if (res)
 372             write_invalid_msvcrt_tm(res);
 373
 374         *MSVCRT__errno() = MSVCRT_EINVAL;
 375         return MSVCRT_EINVAL;
 376     }
 377
 378     _tzset_init();
 379     time = (*secs - MSVCRT___timezone) * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 380
 381     ft.dwHighDateTime = (UINT)(time >> 32);
 382     ft.dwLowDateTime  = (UINT)time;
 383     FileTimeToSystemTime(&ft, &st);
 384
 385     res->tm_isdst = is_dst(&st) ? 1 : 0;
 386     if(res->tm_isdst) {
 387         time -= MSVCRT__dstbias * (ULONGLONG)TICKSPERSEC;
 388         ft.dwHighDateTime = (UINT)(time >> 32);
 389         ft.dwLowDateTime  = (UINT)time;
 390         FileTimeToSystemTime(&ft, &st);
 391     }
 392
 393     res->tm_sec  = st.wSecond;
 394     res->tm_min  = st.wMinute;
 395     res->tm_hour = st.wHour;
 396     res->tm_mday = st.wDay;
 397     res->tm_year = st.wYear - 1900;
 398     res->tm_mon  = st.wMonth - 1;
 399     res->tm_wday = st.wDayOfWeek;
 400     for (i = res->tm_yday = 0; i < st.wMonth - 1; i++)
 401         res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 402     res->tm_yday += st.wDay - 1;
 403
 404     return 0;
 405 }
 406
 407 /*********************************************************************
 408  *      _localtime64 (MSVCRT.@)
 409  */
 410 struct MSVCRT_tm* CDECL MSVCRT__localtime64(const MSVCRT___time64_t* secs)
 411 {
 412     thread_data_t *data = msvcrt_get_thread_data();
 413
 414     if(!data->time_buffer)
 415         data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));
 416
 417     if(_localtime64_s(data->time_buffer, secs))
 418         return NULL;
 419     return data->time_buffer;
 420 }
 421
 422 /*********************************************************************
 423  *      _localtime32 (MSVCRT.@)
 424  */
 425 struct MSVCRT_tm* CDECL MSVCRT__localtime32(const MSVCRT___time32_t* secs)
 426 {
 427     MSVCRT___time64_t secs64;
 428
 429     if(!secs)
 430         return NULL;
 431
 432     secs64 = *secs;
 433     return MSVCRT__localtime64( &secs64 );
 434 }
 435
 436 /*********************************************************************
 437  *      _localtime32_s (MSVCRT.@)
 438  */
 439 int CDECL _localtime32_s(struct MSVCRT_tm *time, const MSVCRT___time32_t *secs)
 440 {
 441     MSVCRT___time64_t secs64;
 442
 443     if (!time || !secs || *secs < 0)
 444     {
 445         if (time)
 446             write_invalid_msvcrt_tm(time);
 447
 448         *MSVCRT__errno() = MSVCRT_EINVAL;
 449         return MSVCRT_EINVAL;
 450     }
 451
 452     secs64 = *secs;
 453     return _localtime64_s(time, &secs64);
 454 }
 455
 456 /*********************************************************************
 457  *      localtime (MSVCRT.@)
 458  */
 459 #ifdef _WIN64
 460 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time64_t* secs)
 461 {
 462     return MSVCRT__localtime64( secs );
 463 }
 464 #else
 465 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time32_t* secs)
 466 {
 467     return MSVCRT__localtime32( secs );
 468 }
 469 #endif
 470
 471 /*********************************************************************
 472  *      _gmtime64 (MSVCRT.@)
 473  */
 474 int CDECL MSVCRT__gmtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
 475 {
 476     int i;
 477     FILETIME ft;
 478     SYSTEMTIME st;
 479     ULONGLONG time;
 480
 481     if (!res || !secs || *secs < 0 || *secs > _MAX__TIME64_T) {
 482         if (res) {
 483             write_invalid_msvcrt_tm(res);
 484         }
 485
 486         *MSVCRT__errno() = MSVCRT_EINVAL;
 487         return MSVCRT_EINVAL;
 488     }
 489
 490     time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 491
 492     ft.dwHighDateTime = (UINT)(time >> 32);
 493     ft.dwLowDateTime  = (UINT)time;
 494
 495     FileTimeToSystemTime(&ft, &st);
 496
 497     res->tm_sec  = st.wSecond;
 498     res->tm_min  = st.wMinute;
 499     res->tm_hour = st.wHour;
 500     res->tm_mday = st.wDay;
 501     res->tm_year = st.wYear - 1900;
 502     res->tm_mon  = st.wMonth - 1;
 503     res->tm_wday = st.wDayOfWeek;
 504     for (i = res->tm_yday = 0; i < st.wMonth - 1; i++) {
 505         res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 506     }
 507
 508     res->tm_yday += st.wDay - 1;
 509     res->tm_isdst = 0;
 510
 511     return 0;
 512 }
 513
 514 /*********************************************************************
 515  *      _gmtime64 (MSVCRT.@)
 516  */
 517 struct MSVCRT_tm* CDECL MSVCRT__gmtime64(const MSVCRT___time64_t *secs)
 518 {
 519     thread_data_t * const data = msvcrt_get_thread_data();
 520
 521     if(!data->time_buffer)
 522         data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));
 523
 524     if(MSVCRT__gmtime64_s(data->time_buffer, secs))
 525         return NULL;
 526     return data->time_buffer;
 527 }
 528
 529 /*********************************************************************
 530  *      _gmtime32_s (MSVCRT.@)
 531  */
 532 int CDECL MSVCRT__gmtime32_s(struct MSVCRT_tm *res, const MSVCRT___time32_t *secs)
 533 {
 534     MSVCRT___time64_t secs64;
 535
 536     if(secs) {
 537         secs64 = *secs;
 538         return MSVCRT__gmtime64_s(res, &secs64);
 539     }
 540     return MSVCRT__gmtime64_s(res, NULL);
 541 }
 542
 543 /*********************************************************************
 544  *      _gmtime32 (MSVCRT.@)
 545  */
 546 struct MSVCRT_tm* CDECL MSVCRT__gmtime32(const MSVCRT___time32_t* secs)
 547 {
 548     MSVCRT___time64_t secs64;
 549
 550     if(!secs)
 551         return NULL;
 552
 553     secs64 = *secs;
 554     return MSVCRT__gmtime64( &secs64 );
 555 }
 556
 557 /*********************************************************************
 558  *      gmtime (MSVCRT.@)
 559  */
 560 #ifdef _WIN64
 561 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time64_t* secs)
 562 {
 563     return MSVCRT__gmtime64( secs );
 564 }
 565 #else
 566 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time32_t* secs)
 567 {
 568     return MSVCRT__gmtime32( secs );
 569 }
 570 #endif
 571
 572 /**********************************************************************
 573  *              _strdate (MSVCRT.@)
 574  */
 575 char* CDECL MSVCRT__strdate(char* date)
 576 {
 577   static const char format[] = "MM'/'dd'/'yy";
 578
 579   GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 580
 581   return date;
 582 }
 583
 584 /**********************************************************************
 585  *              _strdate_s (MSVCRT.@)
 586  */
 587 int CDECL _strdate_s(char* date, MSVCRT_size_t size)
 588 {
 589     if(date && size)
 590         date[0] = '\0';
 591
 592     if(!date) {
 593         *MSVCRT__errno() = MSVCRT_EINVAL;
 594         return MSVCRT_EINVAL;
 595     }
 596
 597     if(size < 9) {
 598         *MSVCRT__errno() = MSVCRT_ERANGE;
 599         return MSVCRT_ERANGE;
 600     }
 601
 602     MSVCRT__strdate(date);
 603     return 0;
 604 }
 605
 606 /**********************************************************************
 607  *              _wstrdate (MSVCRT.@)
 608  */
 609 MSVCRT_wchar_t* CDECL MSVCRT__wstrdate(MSVCRT_wchar_t* date)
 610 {
 611   static const WCHAR format[] = { 'M','M','\'','/','\'','d','d','\'','/','\'','y','y',0 };
 612
 613   GetDateFormatW(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 614
 615   return date;
 616 }
 617
 618 /**********************************************************************
 619  *              _wstrdate_s (MSVCRT.@)
 620  */
 621 int CDECL _wstrdate_s(MSVCRT_wchar_t* date, MSVCRT_size_t size)
 622 {
 623     if(date && size)
 624         date[0] = '\0';
 625
 626     if(!date) {
 627         *MSVCRT__errno() = MSVCRT_EINVAL;
 628         return MSVCRT_EINVAL;
 629     }
 630
 631     if(size < 9) {
 632         *MSVCRT__errno() = MSVCRT_ERANGE;
 633         return MSVCRT_ERANGE;
 634     }
 635
 636     MSVCRT__wstrdate(date);
 637     return 0;
 638 }
 639
 640 /*********************************************************************
 641  *              _strtime (MSVCRT.@)
 642  */
 643 char* CDECL MSVCRT__strtime(char* time)
 644 {
 645   static const char format[] = "HH':'mm':'ss";
 646
 647   GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 648
 649   return time;
 650 }
 651
 652 /*********************************************************************
 653  *              _strtime_s (MSVCRT.@)
 654  */
 655 int CDECL _strtime_s(char* time, MSVCRT_size_t size)
 656 {
 657     if(time && size)
 658         time[0] = '\0';
 659
 660     if(!time) {
 661         *MSVCRT__errno() = MSVCRT_EINVAL;
 662         return MSVCRT_EINVAL;
 663     }
 664
 665     if(size < 9) {
 666         *MSVCRT__errno() = MSVCRT_ERANGE;
 667         return MSVCRT_ERANGE;
 668     }
 669
 670     MSVCRT__strtime(time);
 671     return 0;
 672 }
 673
 674 /*********************************************************************
 675  *              _wstrtime (MSVCRT.@)
 676  */
 677 MSVCRT_wchar_t* CDECL MSVCRT__wstrtime(MSVCRT_wchar_t* time)
 678 {
 679   static const WCHAR format[] = { 'H','H','\'',':','\'','m','m','\'',':','\'','s','s',0 };
 680
 681   GetTimeFormatW(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 682
 683   return time;
 684 }
 685
 686 /*********************************************************************
 687  *              _wstrtime_s (MSVCRT.@)
 688  */
 689 int CDECL _wstrtime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size)
 690 {
 691     if(time && size)
 692         time[0] = '\0';
 693
 694     if(!time) {
 695         *MSVCRT__errno() = MSVCRT_EINVAL;
 696         return MSVCRT_EINVAL;
 697     }
 698
 699     if(size < 9) {
 700         *MSVCRT__errno() = MSVCRT_ERANGE;
 701         return MSVCRT_ERANGE;
 702     }
 703
 704     MSVCRT__wstrtime(time);
 705     return 0;
 706 }
 707
 708 /*********************************************************************
 709  *              clock (MSVCRT.@)
 710  */
 711 MSVCRT_clock_t CDECL MSVCRT_clock(void)
 712 {
 713     static LONGLONG start_time;
 714     LARGE_INTEGER systime;
 715
 716     if(!start_time) {
 717         KERNEL_USER_TIMES pti;
 718
 719         /* while Linux's clock returns user time, Windows' clock
 720          * returns wall-clock time from process start.  cache the
 721          * process start time since it won't change and to avoid
 722          * wineserver round-trip overhead */
 723         if(NtQueryInformationProcess(GetCurrentProcess(), ProcessTimes, &pti, sizeof(pti), NULL))
 724             return -1;
 725         start_time = pti.CreateTime.QuadPart;
 726     }
 727
 728     NtQuerySystemTime(&systime);
 729     return (systime.QuadPart - start_time) * MSVCRT_CLOCKS_PER_SEC / TICKSPERSEC;
 730 }
 731
 732 /*********************************************************************
 733  *              _difftime64 (MSVCRT.@)
 734  */
 735 double CDECL MSVCRT__difftime64(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 736 {
 737   return (double)(time1 - time2);
 738 }
 739
 740 /*********************************************************************
 741  *              _difftime32 (MSVCRT.@)
 742  */
 743 double CDECL MSVCRT__difftime32(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 744 {
 745   return (double)(time1 - time2);
 746 }
 747
 748 /*********************************************************************
 749  *              difftime (MSVCRT.@)
 750  */
 751 #ifdef _WIN64
 752 double CDECL MSVCRT_difftime(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 753 {
 754     return MSVCRT__difftime64( time1, time2 );
 755 }
 756 #else
 757 double CDECL MSVCRT_difftime(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 758 {
 759     return MSVCRT__difftime32( time1, time2 );
 760 }
 761 #endif
 762
 763 /*********************************************************************
 764  *              _ftime64 (MSVCRT.@)
 765  */
 766 void CDECL MSVCRT__ftime64(struct MSVCRT___timeb64 *buf)
 767 {
 768   TIME_ZONE_INFORMATION tzinfo;
 769   FILETIME ft;
 770   ULONGLONG time;
 771
 772   DWORD tzid = GetTimeZoneInformation(&tzinfo);
 773   GetSystemTimeAsFileTime(&ft);
 774
 775   time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
 776
 777   buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
 778   buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
 779   buf->timezone = tzinfo.Bias +
 780       ( tzid == TIME_ZONE_ID_STANDARD ? tzinfo.StandardBias :
 781       ( tzid == TIME_ZONE_ID_DAYLIGHT ? tzinfo.DaylightBias : 0 ));
 782   buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
 783 }
 784
 785 /*********************************************************************
 786  *              _ftime64_s (MSVCRT.@)
 787  */
 788 int CDECL MSVCRT__ftime64_s(struct MSVCRT___timeb64 *buf)
 789 {
 790     if (!MSVCRT_CHECK_PMT( buf != NULL )) return MSVCRT_EINVAL;
 791     MSVCRT__ftime64(buf);
 792     return 0;
 793 }
 794
 795 /*********************************************************************
 796  *              _ftime32 (MSVCRT.@)
 797  */
 798 void CDECL MSVCRT__ftime32(struct MSVCRT___timeb32 *buf)
 799 {
 800     struct MSVCRT___timeb64 buf64;
 801
 802     MSVCRT__ftime64( &buf64 );
 803     buf->time     = buf64.time;
 804     buf->millitm  = buf64.millitm;
 805     buf->timezone = buf64.timezone;
 806     buf->dstflag  = buf64.dstflag;
 807 }
 808
 809 /*********************************************************************
 810  *              _ftime32_s (MSVCRT.@)
 811  */
 812 int CDECL MSVCRT__ftime32_s(struct MSVCRT___timeb32 *buf)
 813 {
 814     if (!MSVCRT_CHECK_PMT( buf != NULL )) return MSVCRT_EINVAL;
 815     MSVCRT__ftime32(buf);
 816     return 0;
 817 }
 818
 819 /*********************************************************************
 820  *              _ftime (MSVCRT.@)
 821  */
 822 #ifdef _WIN64
 823 void CDECL MSVCRT__ftime(struct MSVCRT___timeb64 *buf)
 824 {
 825     MSVCRT__ftime64( buf );
 826 }
 827 #else
 828 void CDECL MSVCRT__ftime(struct MSVCRT___timeb32 *buf)
 829 {
 830     MSVCRT__ftime32( buf );
 831 }
 832 #endif
 833
 834 /*********************************************************************
 835  *              _time64 (MSVCRT.@)
 836  */
 837 MSVCRT___time64_t CDECL MSVCRT__time64(MSVCRT___time64_t *buf)
 838 {
 839     MSVCRT___time64_t curtime;
 840     struct MSVCRT___timeb64 tb;
 841
 842     MSVCRT__ftime64(&tb);
 843
 844     curtime = tb.time;
 845     return buf ? *buf = curtime : curtime;
 846 }
 847
 848 /*********************************************************************
 849  *              _time32 (MSVCRT.@)
 850  */
 851 MSVCRT___time32_t CDECL MSVCRT__time32(MSVCRT___time32_t *buf)
 852 {
 853     MSVCRT___time32_t curtime;
 854     struct MSVCRT___timeb64 tb;
 855
 856     MSVCRT__ftime64(&tb);
 857
 858     curtime = tb.time;
 859     return buf ? *buf = curtime : curtime;
 860 }
 861
 862 /*********************************************************************
 863  *              time (MSVCRT.@)
 864  */
 865 #ifdef _WIN64
 866 MSVCRT___time64_t CDECL MSVCRT_time(MSVCRT___time64_t* buf)
 867 {
 868     return MSVCRT__time64( buf );
 869 }
 870 #else
 871 MSVCRT___time32_t CDECL MSVCRT_time(MSVCRT___time32_t* buf)
 872 {
 873     return MSVCRT__time32( buf );
 874 }
 875 #endif
 876
 877 /*********************************************************************
 878  *              __p__daylight (MSVCRT.@)
 879  */
 880 int * CDECL MSVCRT___p__daylight(void)
 881 {
 882         return &MSVCRT___daylight;
 883 }
 884
 885 /*********************************************************************
 886  *              __p__dstbias (MSVCRT.@)
 887  */
 888 int * CDECL MSVCRT___p__dstbias(void)
 889 {
 890     return &MSVCRT__dstbias;
 891 }
 892
 893 /*********************************************************************
 894  *              __p__timezone (MSVCRT.@)
 895  */
 896 MSVCRT_long * CDECL MSVCRT___p__timezone(void)
 897 {
 898         return &MSVCRT___timezone;
 899 }
 900
 901 /*********************************************************************
 902  *              _get_tzname (MSVCRT.@)
 903  */
 904 int CDECL MSVCRT__get_tzname(MSVCRT_size_t *ret, char *buf, MSVCRT_size_t bufsize, int index)
 905 {
 906     char *timezone;
 907
 908     switch(index)
 909     {
 910     case 0:
 911         timezone = tzname_std;
 912         break;
 913     case 1:
 914         timezone = tzname_dst;
 915         break;
 916     default:
 917         *MSVCRT__errno() = MSVCRT_EINVAL;
 918         return MSVCRT_EINVAL;
 919     }
 920
 921     if(!ret || (!buf && bufsize > 0) || (buf && !bufsize))
 922     {
 923         *MSVCRT__errno() = MSVCRT_EINVAL;
 924         return MSVCRT_EINVAL;
 925     }
 926
 927     *ret = strlen(timezone)+1;
 928     if(!buf && !bufsize)
 929         return 0;
 930
 931     strcpy(buf, timezone);
 932     return 0;
 933 }
 934
 935 /*********************************************************************
 936  *              __p_tzname (MSVCRT.@)
 937  */
 938 char ** CDECL __p__tzname(void)
 939 {
 940         return MSVCRT__tzname;
 941 }
 942
 943 static inline BOOL strftime_date(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
 944         BOOL alternate, const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
 945 {
 946     char *format;
 947     SYSTEMTIME st;
 948     MSVCRT_size_t ret;
 949     LCID lcid;
 950
 951     st.wYear = mstm->tm_year + 1900;
 952     st.wMonth = mstm->tm_mon + 1;
 953     st.wDayOfWeek = mstm->tm_wday;
 954     st.wDay = mstm->tm_mday;
 955     st.wHour = mstm->tm_hour;
 956     st.wMinute = mstm->tm_min;
 957     st.wSecond = mstm->tm_sec;
 958     st.wMilliseconds = 0;
 959
 960 #if _MSVCR_VER < 110
 961     lcid = time_data->lcid;
 962 #else
 963     lcid = LocaleNameToLCID(time_data->locname, 0);
 964 #endif
 965
 966     format = alternate ? time_data->str.names.date : time_data->str.names.short_date;
 967     ret = GetDateFormatA(lcid, 0, &st, format, NULL, 0);
 968     if(ret && ret<max-*pos)
 969         ret = GetDateFormatA(lcid, 0, &st, format, str+*pos, max-*pos);
 970     if(!ret) {
 971         *str = 0;
 972         *MSVCRT__errno() = MSVCRT_EINVAL;
 973         return FALSE;
 974     }else if(ret > max-*pos) {
 975         *str = 0;
 976         *MSVCRT__errno() = MSVCRT_ERANGE;
 977         return FALSE;
 978     }
 979     *pos += ret-1;
 980     return TRUE;
 981 }
 982
 983 static inline BOOL strftime_time(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
 984         const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
 985 {
 986     SYSTEMTIME st;
 987     MSVCRT_size_t ret;
 988     LCID lcid;
 989
 990     st.wYear = mstm->tm_year + 1900;
 991     st.wMonth = mstm->tm_mon + 1;
 992     st.wDayOfWeek = mstm->tm_wday;
 993     st.wDay = mstm->tm_mday;
 994     st.wHour = mstm->tm_hour;
 995     st.wMinute = mstm->tm_min;
 996     st.wSecond = mstm->tm_sec;
 997     st.wMilliseconds = 0;
 998
 999 #if _MSVCR_VER < 110
1000     lcid = time_data->lcid;
1001 #else
1002     lcid = LocaleNameToLCID(time_data->locname, 0);
1003 #endif
1004
1005     ret = GetTimeFormatA(lcid, 0, &st, time_data->str.names.time, NULL, 0);
1006     if(ret && ret<max-*pos)
1007         ret = GetTimeFormatA(lcid, 0, &st, time_data->str.names.time,
1008                 str+*pos, max-*pos);
1009     if(!ret) {
1010         *str = 0;
1011         *MSVCRT__errno() = MSVCRT_EINVAL;
1012         return FALSE;
1013     }else if(ret > max-*pos) {
1014         *str = 0;
1015         *MSVCRT__errno() = MSVCRT_ERANGE;
1016         return FALSE;
1017     }
1018     *pos += ret-1;
1019     return TRUE;
1020 }
1021
1022 static inline BOOL strftime_str(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max, char *src)
1023 {
1024     MSVCRT_size_t len = strlen(src);
1025     if(len > max-*pos) {
1026         *str = 0;
1027         *MSVCRT__errno() = MSVCRT_ERANGE;
1028         return FALSE;
1029     }
1030
1031     memcpy(str+*pos, src, len);
1032     *pos += len;
1033     return TRUE;
1034 }
1035
1036 static inline BOOL strftime_int(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
1037         int src, int prec, int l, int h)
1038 {
1039     MSVCRT_size_t len;
1040
1041     if(src<l || src>h) {
1042         *str = 0;
1043         *MSVCRT__errno() = MSVCRT_EINVAL;
1044         return FALSE;
1045     }
1046
1047     len = MSVCRT__snprintf(str+*pos, max-*pos, "%0*d", prec, src);
1048     if(len == -1) {
1049         *str = 0;
1050         *MSVCRT__errno() = MSVCRT_ERANGE;
1051         return FALSE;
1052     }
1053
1054     *pos += len;
1055     return TRUE;
1056 }
1057
1058 /*********************************************************************
1059  *              _Strftime (MSVCRT.@)
1060  */
1061 MSVCRT_size_t CDECL _Strftime(char *str, MSVCRT_size_t max, const char *format,
1062         const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
1063 {
1064     MSVCRT_size_t ret, tmp;
1065     BOOL alternate;
1066
1067     TRACE("(%p %ld %s %p %p)\n", str, max, format, mstm, time_data);
1068
1069     if(!str || !format) {
1070         if(str && max)
1071             *str = 0;
1072         *MSVCRT__errno() = MSVCRT_EINVAL;
1073         return 0;
1074     }
1075
1076     if(!time_data)
1077         time_data = get_locinfo()->lc_time_curr;
1078
1079     for(ret=0; *format && ret<max; format++) {
1080         if(*format != '%') {
1081             str[ret++] = *format;
1082             continue;
1083         }
1084
1085         format++;
1086         if(*format == '#') {
1087             alternate = TRUE;
1088             format++;
1089         }else {
1090             alternate = FALSE;
1091         }
1092
1093         if(!mstm)
1094             goto einval_error;
1095
1096         switch(*format) {
1097         case 'c':
1098             if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
1099                 return 0;
1100             if(ret < max)
1101                 str[ret++] = ' ';
1102             if(!strftime_time(str, &ret, max, mstm, time_data))
1103                 return 0;
1104             break;
1105         case 'x':
1106             if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
1107                 return 0;
1108             break;
1109         case 'X':
1110             if(!strftime_time(str, &ret, max, mstm, time_data))
1111                 return 0;
1112             break;
1113         case 'a':
1114             if(mstm->tm_wday<0 || mstm->tm_wday>6)
1115                 goto einval_error;
1116             if(!strftime_str(str, &ret, max, time_data->str.names.short_wday[mstm->tm_wday]))
1117                 return 0;
1118             break;
1119         case 'A':
1120             if(mstm->tm_wday<0 || mstm->tm_wday>6)
1121                 goto einval_error;
1122             if(!strftime_str(str, &ret, max, time_data->str.names.wday[mstm->tm_wday]))
1123                 return 0;
1124             break;
1125         case 'b':
1126             if(mstm->tm_mon<0 || mstm->tm_mon>11)
1127                 goto einval_error;
1128             if(!strftime_str(str, &ret, max, time_data->str.names.short_mon[mstm->tm_mon]))
1129                 return 0;
1130             break;
1131         case 'B':
1132             if(mstm->tm_mon<0 || mstm->tm_mon>11)
1133                 goto einval_error;
1134             if(!strftime_str(str, &ret, max, time_data->str.names.mon[mstm->tm_mon]))
1135                 return 0;
1136             break;
1137         case 'd':
1138             if(!strftime_int(str, &ret, max, mstm->tm_mday, alternate ? 0 : 2, 0, 31))
1139                 return 0;
1140             break;
1141         case 'H':
1142             if(!strftime_int(str, &ret, max, mstm->tm_hour, alternate ? 0 : 2, 0, 23))
1143                 return 0;
1144             break;
1145         case 'I':
1146             tmp = mstm->tm_hour;
1147             if(tmp > 12)
1148                 tmp -= 12;
1149             else if(!tmp)
1150                 tmp = 12;
1151             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 1, 12))
1152                 return 0;
1153             break;
1154         case 'j':
1155             if(!strftime_int(str, &ret, max, mstm->tm_yday+1, alternate ? 0 : 3, 1, 366))
1156                 return 0;
1157             break;
1158         case 'm':
1159             if(!strftime_int(str, &ret, max, mstm->tm_mon+1, alternate ? 0 : 2, 1, 12))
1160                 return 0;
1161             break;
1162         case 'M':
1163             if(!strftime_int(str, &ret, max, mstm->tm_min, alternate ? 0 : 2, 0, 59))
1164                 return 0;
1165             break;
1166         case 'p':
1167             if(mstm->tm_hour<0 || mstm->tm_hour>23)
1168                 goto einval_error;
1169             if(!strftime_str(str, &ret, max, mstm->tm_hour<12 ?
1170                         time_data->str.names.am : time_data->str.names.pm))
1171                 return 0;
1172             break;
1173         case 'S':
1174             if(!strftime_int(str, &ret, max, mstm->tm_sec, alternate ? 0 : 2, 0, 59))
1175                 return 0;
1176             break;
1177         case 'w':
1178             if(!strftime_int(str, &ret, max, mstm->tm_wday, 0, 0, 6))
1179                 return 0;
1180             break;
1181         case 'y':
1182             if(!strftime_int(str, &ret, max, mstm->tm_year%100, alternate ? 0 : 2, 0, 99))
1183                 return 0;
1184             break;
1185         case 'Y':
1186             tmp = 1900+mstm->tm_year;
1187             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 4, 0, 9999))
1188                 return 0;
1189             break;
1190         case 'z':
1191         case 'Z':
1192             MSVCRT__tzset();
1193             if(MSVCRT__get_tzname(&tmp, str+ret, max-ret, mstm->tm_isdst ? 1 : 0))
1194                 return 0;
1195             ret += tmp;
1196             break;
1197         case 'U':
1198         case 'W':
1199             if(mstm->tm_wday<0 || mstm->tm_wday>6 || mstm->tm_yday<0 || mstm->tm_yday>365)
1200                 goto einval_error;
1201             if(*format == 'U')
1202                 tmp = mstm->tm_wday;
1203             else if(!mstm->tm_wday)
1204                 tmp = 6;
1205             else
1206                 tmp = mstm->tm_wday-1;
1207
1208             tmp = mstm->tm_yday/7 + (tmp<=mstm->tm_yday%7);
1209             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 0, 53))
1210                 return 0;
1211             break;
1212         case '%':
1213             str[ret++] = '%';
1214             break;
1215         default:
1216             WARN("unknown format %c\n", *format);
1217             goto einval_error;
1218         }
1219     }
1220
1221     if(ret == max) {
1222         if(max)
1223             *str = 0;
1224         *MSVCRT__errno() = MSVCRT_ERANGE;
1225         return 0;
1226     }
1227
1228     str[ret] = 0;
1229     return ret;
1230
1231 einval_error:
1232     *str = 0;
1233     *MSVCRT__errno() = MSVCRT_EINVAL;
1234     return 0;
1235 }
1236
1237 /*********************************************************************
1238  *              strftime (MSVCRT.@)
1239  */
1240 MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
1241                                      const struct MSVCRT_tm *mstm )
1242 {
1243     return _Strftime(str, max, format, mstm, NULL);
1244 }
1245
1246 /*********************************************************************
1247  *              wcsftime (MSVCRT.@)
1248  */
1249 MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
1250                                      const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
1251 {
1252     char *s, *fmt;
1253     MSVCRT_size_t len;
1254
1255     TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
1256
1257     len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
1258     if (!(fmt = MSVCRT_malloc( len ))) return 0;
1259     WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );
1260
1261     if ((s = MSVCRT_malloc( max*4 )))
1262     {
1263         if (!MSVCRT_strftime( s, max*4, fmt, mstm )) s[0] = 0;
1264         len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
1265         if (len) len--;
1266         MSVCRT_free( s );
1267     }
1268     else len = 0;
1269
1270     MSVCRT_free( fmt );
1271     return len;
1272 }
1273
1274 static char* asctime_buf(char *buf, const struct MSVCRT_tm *mstm)
1275 {
1276     static const char wday[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
1277     static const char month[12][4] = {"Jan", "Feb", "Mar", "Apr", "May",
1278         "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
1279
1280     if (!mstm || mstm->tm_sec<0 || mstm->tm_sec>59
1281             || mstm->tm_min<0 || mstm->tm_min>59
1282             || mstm->tm_hour<0 || mstm->tm_hour>23
1283             || mstm->tm_mon<0 || mstm->tm_mon>11
1284             || mstm->tm_wday<0 || mstm->tm_wday>6
1285             || mstm->tm_year<0 || mstm->tm_mday<0
1286             || mstm->tm_mday>MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon]) {
1287         *MSVCRT__errno() = MSVCRT_EINVAL;
1288         return NULL;
1289     }
1290
1291     MSVCRT__snprintf(buf, 26, "%s %s %02d %02d:%02d:%02d %c%03d\n", wday[mstm->tm_wday],
1292             month[mstm->tm_mon], mstm->tm_mday, mstm->tm_hour, mstm->tm_min,
1293             mstm->tm_sec, '1'+(mstm->tm_year+900)/1000, (900+mstm->tm_year)%1000);
1294     return buf;
1295 }
1296
1297 /*********************************************************************
1298  *              asctime (MSVCRT.@)
1299  */
1300 char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
1301 {
1302     thread_data_t *data = msvcrt_get_thread_data();
1303
1304     /* asctime returns date in format that always has exactly 26 characters */
1305     if (!data->asctime_buffer) {
1306         data->asctime_buffer = MSVCRT_malloc(26);
1307         if (!data->asctime_buffer) {
1308             *MSVCRT__errno() = MSVCRT_ENOMEM;
1309             return NULL;
1310         }
1311     }
1312
1313     return asctime_buf(data->asctime_buffer, mstm);
1314 }
1315
1316 /*********************************************************************
1317  *      asctime_s (MSVCRT.@)
1318  */
1319 int CDECL MSVCRT_asctime_s(char* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
1320 {
1321     if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1322     if (size) time[0] = 0;
1323     if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
1324     if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
1325     if (!MSVCRT_CHECK_PMT(mstm->tm_sec >= 0 && mstm->tm_sec < 60)) return MSVCRT_EINVAL;
1326     if (!MSVCRT_CHECK_PMT(mstm->tm_min >= 0 && mstm->tm_min < 60)) return MSVCRT_EINVAL;
1327     if (!MSVCRT_CHECK_PMT(mstm->tm_hour >= 0 && mstm->tm_hour < 24)) return MSVCRT_EINVAL;
1328     if (!MSVCRT_CHECK_PMT(mstm->tm_mon >= 0 && mstm->tm_mon < 12)) return MSVCRT_EINVAL;
1329     if (!MSVCRT_CHECK_PMT(mstm->tm_wday >= 0 && mstm->tm_wday < 7)) return MSVCRT_EINVAL;
1330     if (!MSVCRT_CHECK_PMT(mstm->tm_year >= 0)) return MSVCRT_EINVAL;
1331     if (!MSVCRT_CHECK_PMT(mstm->tm_mday >= 0)) return MSVCRT_EINVAL;
1332     if (!MSVCRT_CHECK_PMT(mstm->tm_mday <= MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon])) return MSVCRT_EINVAL;
1333
1334     asctime_buf(time, mstm);
1335     return 0;
1336 }
1337
1338 /*********************************************************************
1339  *              _wasctime (MSVCRT.@)
1340  */
1341 MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
1342 {
1343     thread_data_t *data = msvcrt_get_thread_data();
1344     char buffer[26];
1345
1346     if(!data->wasctime_buffer) {
1347         data->wasctime_buffer = MSVCRT_malloc(26*sizeof(MSVCRT_wchar_t));
1348         if(!data->wasctime_buffer) {
1349             *MSVCRT__errno() = MSVCRT_ENOMEM;
1350             return NULL;
1351         }
1352     }
1353
1354     if(!asctime_buf(buffer, mstm))
1355         return NULL;
1356
1357     MultiByteToWideChar(CP_ACP, 0, buffer, -1, data->wasctime_buffer, 26);
1358     return data->wasctime_buffer;
1359 }
1360
1361 /*********************************************************************
1362  *      _wasctime_s (MSVCRT.@)
1363  */
1364 int CDECL MSVCRT__wasctime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
1365 {
1366     char buffer[26];
1367     int ret;
1368
1369     if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1370     if (size) time[0] = 0;
1371     if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
1372     if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
1373
1374     ret = MSVCRT_asctime_s(buffer, sizeof(buffer), mstm);
1375     if(ret)
1376         return ret;
1377     MultiByteToWideChar(CP_ACP, 0, buffer, -1, time, size);
1378     return 0;
1379 }
1380
1381 /*********************************************************************
1382  *              _ctime64 (MSVCRT.@)
1383  */
1384 char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
1385 {
1386     struct MSVCRT_tm *t;
1387     t = MSVCRT__localtime64( time );
1388     if (!t) return NULL;
1389     return MSVCRT_asctime( t );
1390 }
1391
1392 /*********************************************************************
1393  *              _ctime64_s (MSVCRT.@)
1394  */
1395 int CDECL MSVCRT__ctime64_s(char *res, MSVCRT_size_t len, const MSVCRT___time64_t *time)
1396 {
1397     struct MSVCRT_tm *t;
1398
1399     if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
1400     if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
1401     res[0] = '\0';
1402     if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
1403     if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;
1404
1405     t = MSVCRT__localtime64( time );
1406     strcpy( res, MSVCRT_asctime( t ) );
1407     return 0;
1408 }
1409
1410 /*********************************************************************
1411  *              _ctime32 (MSVCRT.@)
1412  */
1413 char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
1414 {
1415     struct MSVCRT_tm *t;
1416     t = MSVCRT__localtime32( time );
1417     if (!t) return NULL;
1418     return MSVCRT_asctime( t );
1419 }
1420
1421 /*********************************************************************
1422  *              _ctime32_s (MSVCRT.@)
1423  */
1424 int CDECL MSVCRT__ctime32_s(char *res, MSVCRT_size_t len, const MSVCRT___time32_t *time)
1425 {
1426     struct MSVCRT_tm *t;
1427
1428     if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
1429     if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
1430     res[0] = '\0';
1431     if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
1432     if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;
1433
1434     t = MSVCRT__localtime32( time );
1435     strcpy( res, MSVCRT_asctime( t ) );
1436     return 0;
1437 }
1438
1439 /*********************************************************************
1440  *              ctime (MSVCRT.@)
1441  */
1442 #ifdef _WIN64
1443 char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
1444 {
1445     return MSVCRT__ctime64( time );
1446 }
1447 #else
1448 char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
1449 {
1450     return MSVCRT__ctime32( time );
1451 }
1452 #endif
1453
1454 /*********************************************************************
1455  *              _wctime64 (MSVCRT.@)
1456  */
1457 MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
1458 {
1459     return MSVCRT__wasctime( MSVCRT__localtime64(time) );
1460 }
1461
1462 /*********************************************************************
1463  *              _wctime32 (MSVCRT.@)
1464  */
1465 MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
1466 {
1467     return MSVCRT__wasctime( MSVCRT__localtime32(time) );
1468 }
1469
1470 /*********************************************************************
1471  *              _wctime (MSVCRT.@)
1472  */
1473 #ifdef _WIN64
1474 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
1475 {
1476     return MSVCRT__wctime64( time );
1477 }
1478 #else
1479 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
1480 {
1481     return MSVCRT__wctime32( time );
1482 }
1483 #endif
1484
1485 /*********************************************************************
1486  *              _wctime64_s (MSVCRT.@)
1487  */
1488 int CDECL MSVCRT__wctime64_s(MSVCRT_wchar_t *buf,
1489         MSVCRT_size_t size, const MSVCRT___time64_t *time)
1490 {
1491     struct MSVCRT_tm tm;
1492     int ret;
1493
1494     if(!MSVCRT_CHECK_PMT(buf != NULL)) return MSVCRT_EINVAL;
1495     if(!MSVCRT_CHECK_PMT(size != 0)) return MSVCRT_EINVAL;
1496     buf[0] = 0;
1497     if(!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1498     if(!MSVCRT_CHECK_PMT(*time >= 0)) return MSVCRT_EINVAL;
1499     if(!MSVCRT_CHECK_PMT(*time <= _MAX__TIME64_T)) return MSVCRT_EINVAL;
1500
1501     ret = _localtime64_s(&tm, time);
1502     if(ret != 0)
1503         return ret;
1504
1505     return MSVCRT__wasctime_s(buf, size, &tm);
1506 }
1507
1508 /*********************************************************************
1509  *              _wctime32_s (MSVCRT.@)
1510  */
1511 int CDECL MSVCRT__wctime32_s(MSVCRT_wchar_t *buf, MSVCRT_size_t size,
1512         const MSVCRT___time32_t *time)
1513 {
1514     struct MSVCRT_tm tm;
1515     int ret;
1516
1517     if(!MSVCRT_CHECK_PMT(buf != NULL)) return MSVCRT_EINVAL;
1518     if(!MSVCRT_CHECK_PMT(size != 0)) return MSVCRT_EINVAL;
1519     buf[0] = 0;
1520     if(!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1521     if(!MSVCRT_CHECK_PMT(*time >= 0)) return MSVCRT_EINVAL;
1522
1523     ret = _localtime32_s(&tm, time);
1524     if(ret != 0)
1525         return ret;
1526
1527     return MSVCRT__wasctime_s(buf, size, &tm);
1528 }
1529
1530 /*********************************************************************
1531  * _get_timezone (MSVCR100.@)
1532  */
1533 int CDECL _get_timezone(LONG *timezone)
1534 {
1535     if(!MSVCRT_CHECK_PMT(timezone != NULL)) return MSVCRT_EINVAL;
1536
1537     *timezone = MSVCRT___timezone;
1538     return 0;
1539 }
1540
1541 /*********************************************************************
1542  * _get_daylight (MSVCR100.@)
1543  */
1544 int CDECL _get_daylight(int *hours)
1545 {
1546     if(!MSVCRT_CHECK_PMT(hours != NULL)) return MSVCRT_EINVAL;
1547
1548     *hours = MSVCRT___daylight;
1549     return 0;
1550 }