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 __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
 950     st.wYear = mstm->tm_year + 1900;
 951     st.wMonth = mstm->tm_mon + 1;
 952     st.wDayOfWeek = mstm->tm_wday;
 953     st.wDay = mstm->tm_mday;
 954     st.wHour = mstm->tm_hour;
 955     st.wMinute = mstm->tm_min;
 956     st.wSecond = mstm->tm_sec;
 957     st.wMilliseconds = 0;
 958
 959     format = alternate ? time_data->str.names.date : time_data->str.names.short_date;
 960     ret = GetDateFormatA(time_data->lcid, 0, &st, format, NULL, 0);
 961     if(ret && ret<max-*pos)
 962         ret = GetDateFormatA(time_data->lcid, 0, &st, format, str+*pos, max-*pos);
 963     if(!ret) {
 964         *str = 0;
 965         *MSVCRT__errno() = MSVCRT_EINVAL;
 966         return FALSE;
 967     }else if(ret > max-*pos) {
 968         *str = 0;
 969         *MSVCRT__errno() = MSVCRT_ERANGE;
 970         return FALSE;
 971     }
 972     *pos += ret-1;
 973     return TRUE;
 974 }
 975
 976 static inline BOOL strftime_time(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
 977         const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
 978 {
 979     SYSTEMTIME st;
 980     MSVCRT_size_t ret;
 981
 982     st.wYear = mstm->tm_year + 1900;
 983     st.wMonth = mstm->tm_mon + 1;
 984     st.wDayOfWeek = mstm->tm_wday;
 985     st.wDay = mstm->tm_mday;
 986     st.wHour = mstm->tm_hour;
 987     st.wMinute = mstm->tm_min;
 988     st.wSecond = mstm->tm_sec;
 989     st.wMilliseconds = 0;
 990
 991     ret = GetTimeFormatA(time_data->lcid, 0, &st, time_data->str.names.time, NULL, 0);
 992     if(ret && ret<max-*pos)
 993         ret = GetTimeFormatA(time_data->lcid, 0, &st, time_data->str.names.time,
 994                 str+*pos, max-*pos);
 995     if(!ret) {
 996         *str = 0;
 997         *MSVCRT__errno() = MSVCRT_EINVAL;
 998         return FALSE;
 999     }else if(ret > max-*pos) {
1000         *str = 0;
1001         *MSVCRT__errno() = MSVCRT_ERANGE;
1002         return FALSE;
1003     }
1004     *pos += ret-1;
1005     return TRUE;
1006 }
1007
1008 static inline BOOL strftime_str(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max, char *src)
1009 {
1010     MSVCRT_size_t len = strlen(src);
1011     if(len > max-*pos) {
1012         *str = 0;
1013         *MSVCRT__errno() = MSVCRT_ERANGE;
1014         return FALSE;
1015     }
1016
1017     memcpy(str+*pos, src, len);
1018     *pos += len;
1019     return TRUE;
1020 }
1021
1022 static inline BOOL strftime_int(char *str, MSVCRT_size_t *pos, MSVCRT_size_t max,
1023         int src, int prec, int l, int h)
1024 {
1025     MSVCRT_size_t len;
1026
1027     if(src<l || src>h) {
1028         *str = 0;
1029         *MSVCRT__errno() = MSVCRT_EINVAL;
1030         return FALSE;
1031     }
1032
1033     len = MSVCRT__snprintf(str+*pos, max-*pos, "%0*d", prec, src);
1034     if(len == -1) {
1035         *str = 0;
1036         *MSVCRT__errno() = MSVCRT_ERANGE;
1037         return FALSE;
1038     }
1039
1040     *pos += len;
1041     return TRUE;
1042 }
1043
1044 /*********************************************************************
1045  *              _Strftime (MSVCRT.@)
1046  */
1047 MSVCRT_size_t CDECL _Strftime(char *str, MSVCRT_size_t max, const char *format,
1048         const struct MSVCRT_tm *mstm, MSVCRT___lc_time_data *time_data)
1049 {
1050     MSVCRT_size_t ret, tmp;
1051     BOOL alternate;
1052
1053     TRACE("(%p %ld %s %p %p)\n", str, max, format, mstm, time_data);
1054
1055     if(!str || !format) {
1056         if(str && max)
1057             *str = 0;
1058         *MSVCRT__errno() = MSVCRT_EINVAL;
1059         return 0;
1060     }
1061
1062     if(!time_data)
1063         time_data = get_locinfo()->lc_time_curr;
1064
1065     for(ret=0; *format && ret<max; format++) {
1066         if(*format != '%') {
1067             str[ret++] = *format;
1068             continue;
1069         }
1070
1071         format++;
1072         if(*format == '#') {
1073             alternate = TRUE;
1074             format++;
1075         }else {
1076             alternate = FALSE;
1077         }
1078
1079         if(!mstm)
1080             goto einval_error;
1081
1082         switch(*format) {
1083         case 'c':
1084             if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
1085                 return 0;
1086             if(ret < max)
1087                 str[ret++] = ' ';
1088             if(!strftime_time(str, &ret, max, mstm, time_data))
1089                 return 0;
1090             break;
1091         case 'x':
1092             if(!strftime_date(str, &ret, max, alternate, mstm, time_data))
1093                 return 0;
1094             break;
1095         case 'X':
1096             if(!strftime_time(str, &ret, max, mstm, time_data))
1097                 return 0;
1098             break;
1099         case 'a':
1100             if(mstm->tm_wday<0 || mstm->tm_wday>6)
1101                 goto einval_error;
1102             if(!strftime_str(str, &ret, max, time_data->str.names.short_wday[mstm->tm_wday]))
1103                 return 0;
1104             break;
1105         case 'A':
1106             if(mstm->tm_wday<0 || mstm->tm_wday>6)
1107                 goto einval_error;
1108             if(!strftime_str(str, &ret, max, time_data->str.names.wday[mstm->tm_wday]))
1109                 return 0;
1110             break;
1111         case 'b':
1112             if(mstm->tm_mon<0 || mstm->tm_mon>11)
1113                 goto einval_error;
1114             if(!strftime_str(str, &ret, max, time_data->str.names.short_mon[mstm->tm_mon]))
1115                 return 0;
1116             break;
1117         case 'B':
1118             if(mstm->tm_mon<0 || mstm->tm_mon>11)
1119                 goto einval_error;
1120             if(!strftime_str(str, &ret, max, time_data->str.names.mon[mstm->tm_mon]))
1121                 return 0;
1122             break;
1123         case 'd':
1124             if(!strftime_int(str, &ret, max, mstm->tm_mday, alternate ? 0 : 2, 0, 31))
1125                 return 0;
1126             break;
1127         case 'H':
1128             if(!strftime_int(str, &ret, max, mstm->tm_hour, alternate ? 0 : 2, 0, 23))
1129                 return 0;
1130             break;
1131         case 'I':
1132             tmp = mstm->tm_hour;
1133             if(tmp > 12)
1134                 tmp -= 12;
1135             else if(!tmp)
1136                 tmp = 12;
1137             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 1, 12))
1138                 return 0;
1139             break;
1140         case 'j':
1141             if(!strftime_int(str, &ret, max, mstm->tm_yday+1, alternate ? 0 : 3, 1, 366))
1142                 return 0;
1143             break;
1144         case 'm':
1145             if(!strftime_int(str, &ret, max, mstm->tm_mon+1, alternate ? 0 : 2, 1, 12))
1146                 return 0;
1147             break;
1148         case 'M':
1149             if(!strftime_int(str, &ret, max, mstm->tm_min, alternate ? 0 : 2, 0, 59))
1150                 return 0;
1151             break;
1152         case 'p':
1153             if(mstm->tm_hour<0 || mstm->tm_hour>23)
1154                 goto einval_error;
1155             if(!strftime_str(str, &ret, max, mstm->tm_hour<12 ?
1156                         time_data->str.names.am : time_data->str.names.pm))
1157                 return 0;
1158             break;
1159         case 'S':
1160             if(!strftime_int(str, &ret, max, mstm->tm_sec, alternate ? 0 : 2, 0, 59))
1161                 return 0;
1162             break;
1163         case 'w':
1164             if(!strftime_int(str, &ret, max, mstm->tm_wday, 0, 0, 6))
1165                 return 0;
1166             break;
1167         case 'y':
1168             if(!strftime_int(str, &ret, max, mstm->tm_year%100, alternate ? 0 : 2, 0, 99))
1169                 return 0;
1170             break;
1171         case 'Y':
1172             tmp = 1900+mstm->tm_year;
1173             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 4, 0, 9999))
1174                 return 0;
1175             break;
1176         case 'z':
1177         case 'Z':
1178             MSVCRT__tzset();
1179             if(MSVCRT__get_tzname(&tmp, str+ret, max-ret, mstm->tm_isdst ? 1 : 0))
1180                 return 0;
1181             ret += tmp;
1182             break;
1183         case 'U':
1184         case 'W':
1185             if(mstm->tm_wday<0 || mstm->tm_wday>6 || mstm->tm_yday<0 || mstm->tm_yday>365)
1186                 goto einval_error;
1187             if(*format == 'U')
1188                 tmp = mstm->tm_wday;
1189             else if(!mstm->tm_wday)
1190                 tmp = 6;
1191             else
1192                 tmp = mstm->tm_wday-1;
1193
1194             tmp = mstm->tm_yday/7 + (tmp<=mstm->tm_yday%7);
1195             if(!strftime_int(str, &ret, max, tmp, alternate ? 0 : 2, 0, 53))
1196                 return 0;
1197             break;
1198         case '%':
1199             str[ret++] = '%';
1200             break;
1201         default:
1202             WARN("unknown format %c\n", *format);
1203             goto einval_error;
1204         }
1205     }
1206
1207     if(ret == max) {
1208         if(max)
1209             *str = 0;
1210         *MSVCRT__errno() = MSVCRT_ERANGE;
1211         return 0;
1212     }
1213
1214     str[ret] = 0;
1215     return ret;
1216
1217 einval_error:
1218     *str = 0;
1219     *MSVCRT__errno() = MSVCRT_EINVAL;
1220     return 0;
1221 }
1222
1223 /*********************************************************************
1224  *              strftime (MSVCRT.@)
1225  */
1226 MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
1227                                      const struct MSVCRT_tm *mstm )
1228 {
1229     return _Strftime(str, max, format, mstm, NULL);
1230 }
1231
1232 /*********************************************************************
1233  *              wcsftime (MSVCRT.@)
1234  */
1235 MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
1236                                      const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
1237 {
1238     char *s, *fmt;
1239     MSVCRT_size_t len;
1240
1241     TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
1242
1243     len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
1244     if (!(fmt = MSVCRT_malloc( len ))) return 0;
1245     WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );
1246
1247     if ((s = MSVCRT_malloc( max*4 )))
1248     {
1249         if (!MSVCRT_strftime( s, max*4, fmt, mstm )) s[0] = 0;
1250         len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
1251         if (len) len--;
1252         MSVCRT_free( s );
1253     }
1254     else len = 0;
1255
1256     MSVCRT_free( fmt );
1257     return len;
1258 }
1259
1260 static char* asctime_buf(char *buf, const struct MSVCRT_tm *mstm)
1261 {
1262     static const char wday[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
1263     static const char month[12][4] = {"Jan", "Feb", "Mar", "Apr", "May",
1264         "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
1265
1266     if (mstm->tm_sec<0 || mstm->tm_sec>59
1267             || mstm->tm_min<0 || mstm->tm_min>59
1268             || mstm->tm_hour<0 || mstm->tm_hour>23
1269             || mstm->tm_mon<0 || mstm->tm_mon>11
1270             || mstm->tm_wday<0 || mstm->tm_wday>6
1271             || mstm->tm_year<0 || mstm->tm_mday<0
1272             || mstm->tm_mday>MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon]) {
1273         *MSVCRT__errno() = MSVCRT_EINVAL;
1274         return NULL;
1275     }
1276
1277     MSVCRT__snprintf(buf, 26, "%s %s %02d %02d:%02d:%02d %c%03d\n", wday[mstm->tm_wday],
1278             month[mstm->tm_mon], mstm->tm_mday, mstm->tm_hour, mstm->tm_min,
1279             mstm->tm_sec, '1'+(mstm->tm_year+900)/1000, (900+mstm->tm_year)%1000);
1280     return buf;
1281 }
1282
1283 /*********************************************************************
1284  *              asctime (MSVCRT.@)
1285  */
1286 char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
1287 {
1288     thread_data_t *data = msvcrt_get_thread_data();
1289
1290     /* asctime returns date in format that always has exactly 26 characters */
1291     if (!data->asctime_buffer) {
1292         data->asctime_buffer = MSVCRT_malloc(26);
1293         if (!data->asctime_buffer) {
1294             *MSVCRT__errno() = MSVCRT_ENOMEM;
1295             return NULL;
1296         }
1297     }
1298
1299     return asctime_buf(data->asctime_buffer, mstm);
1300 }
1301
1302 /*********************************************************************
1303  *      asctime_s (MSVCRT.@)
1304  */
1305 int CDECL MSVCRT_asctime_s(char* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
1306 {
1307     if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1308     if (size) time[0] = 0;
1309     if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
1310     if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
1311     if (!MSVCRT_CHECK_PMT(mstm->tm_sec >= 0 && mstm->tm_sec < 60)) return MSVCRT_EINVAL;
1312     if (!MSVCRT_CHECK_PMT(mstm->tm_min >= 0 && mstm->tm_min < 60)) return MSVCRT_EINVAL;
1313     if (!MSVCRT_CHECK_PMT(mstm->tm_hour >= 0 && mstm->tm_hour < 24)) return MSVCRT_EINVAL;
1314     if (!MSVCRT_CHECK_PMT(mstm->tm_mon >= 0 && mstm->tm_mon < 12)) return MSVCRT_EINVAL;
1315     if (!MSVCRT_CHECK_PMT(mstm->tm_wday >= 0 && mstm->tm_wday < 7)) return MSVCRT_EINVAL;
1316     if (!MSVCRT_CHECK_PMT(mstm->tm_year >= 0)) return MSVCRT_EINVAL;
1317     if (!MSVCRT_CHECK_PMT(mstm->tm_mday >= 0)) return MSVCRT_EINVAL;
1318     if (!MSVCRT_CHECK_PMT(mstm->tm_mday <= MonthLengths[IsLeapYear(1900+mstm->tm_year)][mstm->tm_mon])) return MSVCRT_EINVAL;
1319
1320     asctime_buf(time, mstm);
1321     return 0;
1322 }
1323
1324 /*********************************************************************
1325  *              _wasctime (MSVCRT.@)
1326  */
1327 MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
1328 {
1329     thread_data_t *data = msvcrt_get_thread_data();
1330     char buffer[26];
1331
1332     if(!data->wasctime_buffer) {
1333         data->wasctime_buffer = MSVCRT_malloc(26*sizeof(MSVCRT_wchar_t));
1334         if(!data->wasctime_buffer) {
1335             *MSVCRT__errno() = MSVCRT_ENOMEM;
1336             return NULL;
1337         }
1338     }
1339
1340     if(!asctime_buf(buffer, mstm))
1341         return NULL;
1342
1343     MultiByteToWideChar(CP_ACP, 0, buffer, -1, data->wasctime_buffer, 26);
1344     return data->wasctime_buffer;
1345 }
1346
1347 /*********************************************************************
1348  *      _wasctime_s (MSVCRT.@)
1349  */
1350 int CDECL MSVCRT__wasctime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
1351 {
1352     char buffer[26];
1353     int ret;
1354
1355     if (!MSVCRT_CHECK_PMT(time != NULL)) return MSVCRT_EINVAL;
1356     if (size) time[0] = 0;
1357     if (!MSVCRT_CHECK_PMT(size >= 26)) return MSVCRT_EINVAL;
1358     if (!MSVCRT_CHECK_PMT(mstm != NULL)) return MSVCRT_EINVAL;
1359
1360     ret = MSVCRT_asctime_s(buffer, sizeof(buffer), mstm);
1361     if(!ret)
1362         return ret;
1363     MultiByteToWideChar(CP_ACP, 0, buffer, -1, time, size);
1364     return 0;
1365 }
1366
1367 /*********************************************************************
1368  *              _ctime64 (MSVCRT.@)
1369  */
1370 char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
1371 {
1372     struct MSVCRT_tm *t;
1373     t = MSVCRT__localtime64( time );
1374     if (!t) return NULL;
1375     return MSVCRT_asctime( t );
1376 }
1377
1378 /*********************************************************************
1379  *              _ctime64_s (MSVCRT.@)
1380  */
1381 int CDECL MSVCRT__ctime64_s(char *res, MSVCRT_size_t len, const MSVCRT___time64_t *time)
1382 {
1383     struct MSVCRT_tm *t;
1384
1385     if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
1386     if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
1387     res[0] = '\0';
1388     if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
1389     if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;
1390
1391     t = MSVCRT__localtime64( time );
1392     strcpy( res, MSVCRT_asctime( t ) );
1393     return 0;
1394 }
1395
1396 /*********************************************************************
1397  *              _ctime32 (MSVCRT.@)
1398  */
1399 char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
1400 {
1401     struct MSVCRT_tm *t;
1402     t = MSVCRT__localtime32( time );
1403     if (!t) return NULL;
1404     return MSVCRT_asctime( t );
1405 }
1406
1407 /*********************************************************************
1408  *              _ctime32_s (MSVCRT.@)
1409  */
1410 int CDECL MSVCRT__ctime32_s(char *res, MSVCRT_size_t len, const MSVCRT___time32_t *time)
1411 {
1412     struct MSVCRT_tm *t;
1413
1414     if (!MSVCRT_CHECK_PMT( res != NULL )) return MSVCRT_EINVAL;
1415     if (!MSVCRT_CHECK_PMT( len >= 26 )) return MSVCRT_EINVAL;
1416     res[0] = '\0';
1417     if (!MSVCRT_CHECK_PMT( time != NULL )) return MSVCRT_EINVAL;
1418     if (!MSVCRT_CHECK_PMT( *time > 0 )) return MSVCRT_EINVAL;
1419
1420     t = MSVCRT__localtime32( time );
1421     strcpy( res, MSVCRT_asctime( t ) );
1422     return 0;
1423 }
1424
1425 /*********************************************************************
1426  *              ctime (MSVCRT.@)
1427  */
1428 #ifdef _WIN64
1429 char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
1430 {
1431     return MSVCRT__ctime64( time );
1432 }
1433 #else
1434 char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
1435 {
1436     return MSVCRT__ctime32( time );
1437 }
1438 #endif
1439
1440 /*********************************************************************
1441  *              _wctime64 (MSVCRT.@)
1442  */
1443 MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
1444 {
1445     return MSVCRT__wasctime( MSVCRT__localtime64(time) );
1446 }
1447
1448 /*********************************************************************
1449  *              _wctime32 (MSVCRT.@)
1450  */
1451 MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
1452 {
1453     return MSVCRT__wasctime( MSVCRT__localtime32(time) );
1454 }
1455
1456 /*********************************************************************
1457  *              _wctime (MSVCRT.@)
1458  */
1459 #ifdef _WIN64
1460 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
1461 {
1462     return MSVCRT__wctime64( time );
1463 }
1464 #else
1465 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
1466 {
1467     return MSVCRT__wctime32( time );
1468 }
1469 #endif