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 #define _POSIX_PTHREAD_SEMANTICS /* switch to a 2 arg style asctime_r on Solaris */
  28 #include <time.h>
  29 #ifdef HAVE_SYS_TIMES_H
  30 # include <sys/times.h>
  31 #endif
  32 #include <limits.h>
  33
  34 #include "msvcrt.h"
  35 #include "mtdll.h"
  36 #include "winbase.h"
  37 #include "winnls.h"
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  41
  42 static const int MonthLengths[2][12] =
  43 {
  44     { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
  45     { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
  46 };
  47
  48 static inline int IsLeapYear(int Year)
  49 {
  50     return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
  51 }
  52
  53 static inline void msvcrt_tm_to_unix( struct tm *dest, const struct MSVCRT_tm *src )
  54 {
  55     memset( dest, 0, sizeof(*dest) );
  56     dest->tm_sec   = src->tm_sec;
  57     dest->tm_min   = src->tm_min;
  58     dest->tm_hour  = src->tm_hour;
  59     dest->tm_mday  = src->tm_mday;
  60     dest->tm_mon   = src->tm_mon;
  61     dest->tm_year  = src->tm_year;
  62     dest->tm_wday  = src->tm_wday;
  63     dest->tm_yday  = src->tm_yday;
  64     dest->tm_isdst = src->tm_isdst;
  65 }
  66
  67 static inline void unix_tm_to_msvcrt( struct MSVCRT_tm *dest, const struct tm *src )
  68 {
  69     memset( dest, 0, sizeof(*dest) );
  70     dest->tm_sec   = src->tm_sec;
  71     dest->tm_min   = src->tm_min;
  72     dest->tm_hour  = src->tm_hour;
  73     dest->tm_mday  = src->tm_mday;
  74     dest->tm_mon   = src->tm_mon;
  75     dest->tm_year  = src->tm_year;
  76     dest->tm_wday  = src->tm_wday;
  77     dest->tm_yday  = src->tm_yday;
  78     dest->tm_isdst = src->tm_isdst;
  79 }
  80
  81 static inline void write_invalid_msvcrt_tm( struct MSVCRT_tm *tm )
  82 {
  83     tm->tm_sec = -1;
  84     tm->tm_min = -1;
  85     tm->tm_hour = -1;
  86     tm->tm_mday = -1;
  87     tm->tm_mon = -1;
  88     tm->tm_year = -1;
  89     tm->tm_wday = -1;
  90     tm->tm_yday = -1;
  91     tm->tm_isdst = -1;
  92 }
  93
  94 #define SECSPERDAY        86400
  95 /* 1601 to 1970 is 369 years plus 89 leap days */
  96 #define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
  97 #define TICKSPERSEC       10000000
  98 #define TICKSPERMSEC      10000
  99 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
 100
 101 /**********************************************************************
 102  *              _mktime64 (MSVCRT.@)
 103  */
 104 MSVCRT___time64_t CDECL MSVCRT__mktime64(struct MSVCRT_tm *mstm)
 105 {
 106     time_t secs;
 107     struct tm tm;
 108
 109     msvcrt_tm_to_unix( &tm, mstm );
 110     secs = mktime( &tm );
 111     unix_tm_to_msvcrt( mstm, &tm );
 112
 113     return secs < 0 ? -1 : secs;
 114 }
 115
 116 /**********************************************************************
 117  *              _mktime32 (MSVCRT.@)
 118  */
 119 MSVCRT___time32_t CDECL MSVCRT__mktime32(struct MSVCRT_tm *mstm)
 120 {
 121     return MSVCRT__mktime64( mstm );
 122 }
 123
 124 /**********************************************************************
 125  *              mktime (MSVCRT.@)
 126  */
 127 #ifdef _WIN64
 128 MSVCRT___time64_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 129 {
 130     return MSVCRT__mktime64( mstm );
 131 }
 132 #else
 133 MSVCRT___time32_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 134 {
 135     return MSVCRT__mktime32( mstm );
 136 }
 137 #endif
 138
 139 /**********************************************************************
 140  *              _mkgmtime64 (MSVCRT.@)
 141  *
 142  * time->tm_isdst value is ignored
 143  */
 144 MSVCRT___time64_t CDECL MSVCRT__mkgmtime64(struct MSVCRT_tm *time)
 145 {
 146     SYSTEMTIME st;
 147     FILETIME ft;
 148     MSVCRT___time64_t ret;
 149     int i;
 150
 151     st.wMilliseconds = 0;
 152     st.wSecond = time->tm_sec;
 153     st.wMinute = time->tm_min;
 154     st.wHour = time->tm_hour;
 155     st.wDay = time->tm_mday;
 156     st.wMonth = time->tm_mon+1;
 157     st.wYear = time->tm_year+1900;
 158
 159     if(!SystemTimeToFileTime(&st, &ft))
 160         return -1;
 161
 162     FileTimeToSystemTime(&ft, &st);
 163     time->tm_wday = st.wDayOfWeek;
 164
 165     for(i=time->tm_yday=0; i<st.wMonth-1; i++)
 166         time->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 167     time->tm_yday += st.wDay-1;
 168
 169     ret = ((MSVCRT___time64_t)ft.dwHighDateTime<<32)+ft.dwLowDateTime;
 170     ret = (ret-TICKS_1601_TO_1970)/TICKSPERSEC;
 171     return ret;
 172 }
 173
 174 /**********************************************************************
 175  *              _mkgmtime32 (MSVCRT.@)
 176  */
 177 MSVCRT___time32_t CDECL MSVCRT__mkgmtime32(struct MSVCRT_tm *time)
 178 {
 179     return MSVCRT__mkgmtime64(time);
 180 }
 181
 182 /**********************************************************************
 183  *              _mkgmtime (MSVCRT.@)
 184  */
 185 #ifdef _WIN64
 186 MSVCRT___time64_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 187 {
 188     return MSVCRT__mkgmtime64(time);
 189 }
 190 #else
 191 MSVCRT___time32_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 192 {
 193     return MSVCRT__mkgmtime32(time);
 194 }
 195 #endif
 196
 197 /*********************************************************************
 198  *      _localtime64 (MSVCRT.@)
 199  */
 200 struct MSVCRT_tm* CDECL MSVCRT__localtime64(const MSVCRT___time64_t* secs)
 201 {
 202     struct tm *tm;
 203     thread_data_t *data;
 204     time_t seconds = *secs;
 205
 206     if (seconds < 0) return NULL;
 207
 208     _mlock(_TIME_LOCK);
 209     if (!(tm = localtime( &seconds))) {
 210         _munlock(_TIME_LOCK);
 211         return NULL;
 212     }
 213
 214     data = msvcrt_get_thread_data();
 215     unix_tm_to_msvcrt( &data->time_buffer, tm );
 216     _munlock(_TIME_LOCK);
 217
 218     return &data->time_buffer;
 219 }
 220
 221 /*********************************************************************
 222  *      _localtime64_s (MSVCRT.@)
 223  */
 224 int CDECL _localtime64_s(struct MSVCRT_tm *time, const MSVCRT___time64_t *secs)
 225 {
 226     struct tm *tm;
 227     time_t seconds;
 228
 229     if (!time || !secs || *secs < 0 || *secs > _MAX__TIME64_T)
 230     {
 231         if (time)
 232             write_invalid_msvcrt_tm(time);
 233
 234         *MSVCRT__errno() = MSVCRT_EINVAL;
 235         return MSVCRT_EINVAL;
 236     }
 237
 238     seconds = *secs;
 239
 240     _mlock(_TIME_LOCK);
 241     if (!(tm = localtime(&seconds)))
 242     {
 243         _munlock(_TIME_LOCK);
 244         *MSVCRT__errno() = MSVCRT_EINVAL;
 245         return MSVCRT_EINVAL;
 246     }
 247
 248     unix_tm_to_msvcrt(time, tm);
 249     _munlock(_TIME_LOCK);
 250     return 0;
 251 }
 252
 253 /*********************************************************************
 254  *      _localtime32 (MSVCRT.@)
 255  */
 256 struct MSVCRT_tm* CDECL MSVCRT__localtime32(const MSVCRT___time32_t* secs)
 257 {
 258     MSVCRT___time64_t secs64 = *secs;
 259     return MSVCRT__localtime64( &secs64 );
 260 }
 261
 262 /*********************************************************************
 263  *      _localtime32_s (MSVCRT.@)
 264  */
 265 int CDECL _localtime32_s(struct MSVCRT_tm *time, const MSVCRT___time32_t *secs)
 266 {
 267     MSVCRT___time64_t secs64;
 268
 269     if (!time || !secs || *secs < 0)
 270     {
 271         if (time)
 272             write_invalid_msvcrt_tm(time);
 273
 274         *MSVCRT__errno() = MSVCRT_EINVAL;
 275         return MSVCRT_EINVAL;
 276     }
 277
 278     secs64 = *secs;
 279     return _localtime64_s(time, &secs64);
 280 }
 281
 282 /*********************************************************************
 283  *      localtime (MSVCRT.@)
 284  */
 285 #ifdef _WIN64
 286 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time64_t* secs)
 287 {
 288     return MSVCRT__localtime64( secs );
 289 }
 290 #else
 291 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time32_t* secs)
 292 {
 293     return MSVCRT__localtime32( secs );
 294 }
 295 #endif
 296
 297 /*********************************************************************
 298  *      _gmtime64 (MSVCRT.@)
 299  */
 300 int CDECL MSVCRT__gmtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
 301 {
 302     int i;
 303     FILETIME ft;
 304     SYSTEMTIME st;
 305     ULONGLONG time;
 306
 307     if (!res || !secs || *secs < 0) {
 308         if (res) {
 309             write_invalid_msvcrt_tm(res);
 310         }
 311
 312         *MSVCRT__errno() = MSVCRT_EINVAL;
 313         return MSVCRT_EINVAL;
 314     }
 315
 316     time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 317
 318     ft.dwHighDateTime = (UINT)(time >> 32);
 319     ft.dwLowDateTime  = (UINT)time;
 320
 321     FileTimeToSystemTime(&ft, &st);
 322
 323     res->tm_sec  = st.wSecond;
 324     res->tm_min  = st.wMinute;
 325     res->tm_hour = st.wHour;
 326     res->tm_mday = st.wDay;
 327     res->tm_year = st.wYear - 1900;
 328     res->tm_mon  = st.wMonth - 1;
 329     res->tm_wday = st.wDayOfWeek;
 330     for (i = res->tm_yday = 0; i < st.wMonth - 1; i++) {
 331         res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 332     }
 333
 334     res->tm_yday += st.wDay - 1;
 335     res->tm_isdst = 0;
 336
 337     return 0;
 338 }
 339
 340 /*********************************************************************
 341  *      _gmtime64 (MSVCRT.@)
 342  */
 343 struct MSVCRT_tm* CDECL MSVCRT__gmtime64(const MSVCRT___time64_t *secs)
 344 {
 345     thread_data_t * const data = msvcrt_get_thread_data();
 346
 347     if(MSVCRT__gmtime64_s(&data->time_buffer, secs))
 348         return NULL;
 349     return &data->time_buffer;
 350 }
 351
 352 /*********************************************************************
 353  *      _gmtime32_s (MSVCRT.@)
 354  */
 355 int CDECL MSVCRT__gmtime32_s(struct MSVCRT_tm *res, const MSVCRT___time32_t *secs)
 356 {
 357     MSVCRT___time64_t secs64;
 358
 359     if(secs) {
 360         secs64 = *secs;
 361         return MSVCRT__gmtime64_s(res, &secs64);
 362     }
 363     return MSVCRT__gmtime64_s(res, NULL);
 364 }
 365
 366 /*********************************************************************
 367  *      _gmtime32 (MSVCRT.@)
 368  */
 369 struct MSVCRT_tm* CDECL MSVCRT__gmtime32(const MSVCRT___time32_t* secs)
 370 {
 371     MSVCRT___time64_t secs64;
 372
 373     if(!secs)
 374         return NULL;
 375
 376     secs64 = *secs;
 377     return MSVCRT__gmtime64( &secs64 );
 378 }
 379
 380 /*********************************************************************
 381  *      gmtime (MSVCRT.@)
 382  */
 383 #ifdef _WIN64
 384 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time64_t* secs)
 385 {
 386     return MSVCRT__gmtime64( secs );
 387 }
 388 #else
 389 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time32_t* secs)
 390 {
 391     return MSVCRT__gmtime32( secs );
 392 }
 393 #endif
 394
 395 /**********************************************************************
 396  *              _strdate (MSVCRT.@)
 397  */
 398 char* CDECL _strdate(char* date)
 399 {
 400   static const char format[] = "MM'/'dd'/'yy";
 401
 402   GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 403
 404   return date;
 405 }
 406
 407 /**********************************************************************
 408  *              _strdate_s (MSVCRT.@)
 409  */
 410 int CDECL _strdate_s(char* date, MSVCRT_size_t size)
 411 {
 412     if(date && size)
 413         date[0] = '\0';
 414
 415     if(!date) {
 416         *MSVCRT__errno() = MSVCRT_EINVAL;
 417         return MSVCRT_EINVAL;
 418     }
 419
 420     if(size < 9) {
 421         *MSVCRT__errno() = MSVCRT_ERANGE;
 422         return MSVCRT_ERANGE;
 423     }
 424
 425     _strdate(date);
 426     return 0;
 427 }
 428
 429 /**********************************************************************
 430  *              _wstrdate (MSVCRT.@)
 431  */
 432 MSVCRT_wchar_t* CDECL _wstrdate(MSVCRT_wchar_t* date)
 433 {
 434   static const WCHAR format[] = { 'M','M','\'','/','\'','d','d','\'','/','\'','y','y',0 };
 435
 436   GetDateFormatW(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 437
 438   return date;
 439 }
 440
 441 /**********************************************************************
 442  *              _wstrdate_s (MSVCRT.@)
 443  */
 444 int CDECL _wstrdate_s(MSVCRT_wchar_t* date, MSVCRT_size_t size)
 445 {
 446     if(date && size)
 447         date[0] = '\0';
 448
 449     if(!date) {
 450         *MSVCRT__errno() = MSVCRT_EINVAL;
 451         return MSVCRT_EINVAL;
 452     }
 453
 454     if(size < 9) {
 455         *MSVCRT__errno() = MSVCRT_ERANGE;
 456         return MSVCRT_ERANGE;
 457     }
 458
 459     _wstrdate(date);
 460     return 0;
 461 }
 462
 463 /*********************************************************************
 464  *              _strtime (MSVCRT.@)
 465  */
 466 char* CDECL _strtime(char* time)
 467 {
 468   static const char format[] = "HH':'mm':'ss";
 469
 470   GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 471
 472   return time;
 473 }
 474
 475 /*********************************************************************
 476  *              _strtime_s (MSVCRT.@)
 477  */
 478 int CDECL _strtime_s(char* time, MSVCRT_size_t size)
 479 {
 480     if(time && size)
 481         time[0] = '\0';
 482
 483     if(!time) {
 484         *MSVCRT__errno() = MSVCRT_EINVAL;
 485         return MSVCRT_EINVAL;
 486     }
 487
 488     if(size < 9) {
 489         *MSVCRT__errno() = MSVCRT_ERANGE;
 490         return MSVCRT_ERANGE;
 491     }
 492
 493     _strtime(time);
 494     return 0;
 495 }
 496
 497 /*********************************************************************
 498  *              _wstrtime (MSVCRT.@)
 499  */
 500 MSVCRT_wchar_t* CDECL _wstrtime(MSVCRT_wchar_t* time)
 501 {
 502   static const WCHAR format[] = { 'H','H','\'',':','\'','m','m','\'',':','\'','s','s',0 };
 503
 504   GetTimeFormatW(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 505
 506   return time;
 507 }
 508
 509 /*********************************************************************
 510  *              _wstrtime_s (MSVCRT.@)
 511  */
 512 int CDECL _wstrtime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size)
 513 {
 514     if(time && size)
 515         time[0] = '\0';
 516
 517     if(!time) {
 518         *MSVCRT__errno() = MSVCRT_EINVAL;
 519         return MSVCRT_EINVAL;
 520     }
 521
 522     if(size < 9) {
 523         *MSVCRT__errno() = MSVCRT_ERANGE;
 524         return MSVCRT_ERANGE;
 525     }
 526
 527     _wstrtime(time);
 528     return 0;
 529 }
 530
 531 /*********************************************************************
 532  *              clock (MSVCRT.@)
 533  */
 534 MSVCRT_clock_t CDECL MSVCRT_clock(void)
 535 {
 536   FILETIME ftc, fte, ftk, ftu;
 537   ULONGLONG utime, ktime;
 538
 539   MSVCRT_clock_t clock;
 540
 541   GetProcessTimes(GetCurrentProcess(), &ftc, &fte, &ftk, &ftu);
 542
 543   ktime = ((ULONGLONG)ftk.dwHighDateTime << 32) | ftk.dwLowDateTime;
 544   utime = ((ULONGLONG)ftu.dwHighDateTime << 32) | ftu.dwLowDateTime;
 545
 546   clock = (utime + ktime) / (TICKSPERSEC / MSVCRT_CLOCKS_PER_SEC);
 547
 548   return clock;
 549 }
 550
 551 /*********************************************************************
 552  *              _difftime64 (MSVCRT.@)
 553  */
 554 double CDECL MSVCRT__difftime64(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 555 {
 556   return (double)(time1 - time2);
 557 }
 558
 559 /*********************************************************************
 560  *              _difftime32 (MSVCRT.@)
 561  */
 562 double CDECL MSVCRT__difftime32(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 563 {
 564   return (double)(time1 - time2);
 565 }
 566
 567 /*********************************************************************
 568  *              difftime (MSVCRT.@)
 569  */
 570 #ifdef _WIN64
 571 double CDECL MSVCRT_difftime(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 572 {
 573     return MSVCRT__difftime64( time1, time2 );
 574 }
 575 #else
 576 double CDECL MSVCRT_difftime(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 577 {
 578     return MSVCRT__difftime32( time1, time2 );
 579 }
 580 #endif
 581
 582 /*********************************************************************
 583  *              _ftime64 (MSVCRT.@)
 584  */
 585 void CDECL MSVCRT__ftime64(struct MSVCRT___timeb64 *buf)
 586 {
 587   TIME_ZONE_INFORMATION tzinfo;
 588   FILETIME ft;
 589   ULONGLONG time;
 590
 591   DWORD tzid = GetTimeZoneInformation(&tzinfo);
 592   GetSystemTimeAsFileTime(&ft);
 593
 594   time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
 595
 596   buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
 597   buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
 598   buf->timezone = tzinfo.Bias +
 599       ( tzid == TIME_ZONE_ID_STANDARD ? tzinfo.StandardBias :
 600       ( tzid == TIME_ZONE_ID_DAYLIGHT ? tzinfo.DaylightBias : 0 ));
 601   buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
 602 }
 603
 604 /*********************************************************************
 605  *              _ftime32 (MSVCRT.@)
 606  */
 607 void CDECL MSVCRT__ftime32(struct MSVCRT___timeb32 *buf)
 608 {
 609     struct MSVCRT___timeb64 buf64;
 610
 611     MSVCRT__ftime64( &buf64 );
 612     buf->time     = buf64.time;
 613     buf->millitm  = buf64.millitm;
 614     buf->timezone = buf64.timezone;
 615     buf->dstflag  = buf64.dstflag;
 616 }
 617
 618 /*********************************************************************
 619  *              _ftime (MSVCRT.@)
 620  */
 621 #ifdef _WIN64
 622 void CDECL MSVCRT__ftime(struct MSVCRT___timeb64 *buf)
 623 {
 624     return MSVCRT__ftime64( buf );
 625 }
 626 #else
 627 void CDECL MSVCRT__ftime(struct MSVCRT___timeb32 *buf)
 628 {
 629     return MSVCRT__ftime32( buf );
 630 }
 631 #endif
 632
 633 /*********************************************************************
 634  *              _time64 (MSVCRT.@)
 635  */
 636 MSVCRT___time64_t CDECL MSVCRT__time64(MSVCRT___time64_t *buf)
 637 {
 638     MSVCRT___time64_t curtime;
 639     struct MSVCRT___timeb64 tb;
 640
 641     MSVCRT__ftime64(&tb);
 642
 643     curtime = tb.time;
 644     return buf ? *buf = curtime : curtime;
 645 }
 646
 647 /*********************************************************************
 648  *              _time32 (MSVCRT.@)
 649  */
 650 MSVCRT___time32_t CDECL MSVCRT__time32(MSVCRT___time32_t *buf)
 651 {
 652     MSVCRT___time32_t curtime;
 653     struct MSVCRT___timeb64 tb;
 654
 655     MSVCRT__ftime64(&tb);
 656
 657     curtime = tb.time;
 658     return buf ? *buf = curtime : curtime;
 659 }
 660
 661 /*********************************************************************
 662  *              time (MSVCRT.@)
 663  */
 664 #ifdef _WIN64
 665 MSVCRT___time64_t CDECL MSVCRT_time(MSVCRT___time64_t* buf)
 666 {
 667     return MSVCRT__time64( buf );
 668 }
 669 #else
 670 MSVCRT___time32_t CDECL MSVCRT_time(MSVCRT___time32_t* buf)
 671 {
 672     return MSVCRT__time32( buf );
 673 }
 674 #endif
 675
 676 /*********************************************************************
 677  *              _daylight (MSVCRT.@)
 678  */
 679 int MSVCRT___daylight = 0;
 680
 681 /*********************************************************************
 682  *              __p_daylight (MSVCRT.@)
 683  */
 684 int * CDECL MSVCRT___p__daylight(void)
 685 {
 686         return &MSVCRT___daylight;
 687 }
 688
 689 /*********************************************************************
 690  *              _dstbias (MSVCRT.@)
 691  */
 692 int MSVCRT__dstbias = 0;
 693
 694 /*********************************************************************
 695  *              __p_dstbias (MSVCRT.@)
 696  */
 697 int * CDECL __p__dstbias(void)
 698 {
 699     return &MSVCRT__dstbias;
 700 }
 701
 702 /*********************************************************************
 703  *              _timezone (MSVCRT.@)
 704  */
 705 MSVCRT_long MSVCRT___timezone = 0;
 706
 707 /*********************************************************************
 708  *              __p_timezone (MSVCRT.@)
 709  */
 710 MSVCRT_long * CDECL MSVCRT___p__timezone(void)
 711 {
 712         return &MSVCRT___timezone;
 713 }
 714
 715 /*********************************************************************
 716  *              _tzname (MSVCRT.@)
 717  * NOTES
 718  *  Some apps (notably Mozilla) insist on writing to these, so the buffer
 719  *  must be large enough.  The size is picked based on observation of
 720  *  Windows XP.
 721  */
 722 static char tzname_std[64] = "PST";
 723 static char tzname_dst[64] = "PDT";
 724 char *MSVCRT__tzname[2] = { tzname_std, tzname_dst };
 725
 726 /*********************************************************************
 727  *              _get_tzname (MSVCRT.@)
 728  */
 729 int CDECL MSVCRT__get_tzname(MSVCRT_size_t *ret, char *buf, MSVCRT_size_t bufsize, int index)
 730 {
 731     char *timezone;
 732
 733     switch(index)
 734     {
 735     case 0:
 736         timezone = tzname_std;
 737         break;
 738     case 1:
 739         timezone = tzname_dst;
 740         break;
 741     default:
 742         *MSVCRT__errno() = MSVCRT_EINVAL;
 743         return MSVCRT_EINVAL;
 744     }
 745
 746     if(!ret || (!buf && bufsize > 0) || (buf && !bufsize))
 747     {
 748         *MSVCRT__errno() = MSVCRT_EINVAL;
 749         return MSVCRT_EINVAL;
 750     }
 751
 752     *ret = strlen(timezone)+1;
 753     if(!buf && !bufsize)
 754         return 0;
 755
 756     strcpy(buf, timezone);
 757     return 0;
 758 }
 759
 760 /*********************************************************************
 761  *              __p_tzname (MSVCRT.@)
 762  */
 763 char ** CDECL __p__tzname(void)
 764 {
 765         return MSVCRT__tzname;
 766 }
 767
 768 /*********************************************************************
 769  *              _tzset (MSVCRT.@)
 770  */
 771 void CDECL MSVCRT__tzset(void)
 772 {
 773     tzset();
 774 #if defined(HAVE_TIMEZONE) && defined(HAVE_DAYLIGHT)
 775     MSVCRT___daylight = daylight;
 776     MSVCRT___timezone = timezone;
 777 #else
 778     {
 779         static const time_t seconds_in_year = (365 * 24 + 6) * 3600;
 780         time_t t;
 781         struct tm *tmp;
 782         int zone_january, zone_july;
 783
 784         _mlock(_TIME_LOCK);
 785         t = (time(NULL) / seconds_in_year) * seconds_in_year;
 786         tmp = localtime(&t);
 787         zone_january = -tmp->tm_gmtoff;
 788         t += seconds_in_year / 2;
 789         tmp = localtime(&t);
 790         zone_july = -tmp->tm_gmtoff;
 791         _munlock(_TIME_LOCK);
 792
 793         MSVCRT___daylight = (zone_january != zone_july);
 794         MSVCRT___timezone = max(zone_january, zone_july);
 795     }
 796 #endif
 797     lstrcpynA(tzname_std, tzname[0], sizeof(tzname_std));
 798     tzname_std[sizeof(tzname_std) - 1] = '\0';
 799     lstrcpynA(tzname_dst, tzname[1], sizeof(tzname_dst));
 800     tzname_dst[sizeof(tzname_dst) - 1] = '\0';
 801 }
 802
 803 /*********************************************************************
 804  *              strftime (MSVCRT.@)
 805  */
 806 MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
 807                                      const struct MSVCRT_tm *mstm )
 808 {
 809     struct tm tm;
 810
 811     msvcrt_tm_to_unix( &tm, mstm );
 812     return strftime( str, max, format, &tm );
 813 }
 814
 815 /*********************************************************************
 816  *              wcsftime (MSVCRT.@)
 817  */
 818 MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
 819                                      const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
 820 {
 821     char *s, *fmt;
 822     MSVCRT_size_t len;
 823
 824     TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
 825
 826     len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
 827     if (!(fmt = MSVCRT_malloc( len ))) return 0;
 828     WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );
 829
 830     if ((s = MSVCRT_malloc( max*4 )))
 831     {
 832         struct tm tm;
 833         msvcrt_tm_to_unix( &tm, mstm );
 834         if (!strftime( s, max*4, fmt, &tm )) s[0] = 0;
 835         len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
 836         if (len) len--;
 837         MSVCRT_free( s );
 838     }
 839     else len = 0;
 840
 841     MSVCRT_free( fmt );
 842     return len;
 843 }
 844
 845 /*********************************************************************
 846  *              asctime (MSVCRT.@)
 847  */
 848 char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
 849 {
 850     char bufferA[30];
 851     WCHAR bufferW[30];
 852
 853     thread_data_t *data = msvcrt_get_thread_data();
 854     struct tm tm;
 855
 856     msvcrt_tm_to_unix( &tm, mstm );
 857
 858     if (!data->asctime_buffer)
 859         data->asctime_buffer = MSVCRT_malloc( 30 ); /* ought to be enough */
 860
 861 #ifdef HAVE_ASCTIME_R
 862     asctime_r( &tm, bufferA );
 863 #else
 864     strcpy( bufferA, asctime(&tm) );
 865 #endif
 866     MultiByteToWideChar( CP_UNIXCP, 0, bufferA, -1, bufferW, 30 );
 867     WideCharToMultiByte( CP_ACP, 0, bufferW, -1, data->asctime_buffer, 30, NULL, NULL );
 868     return data->asctime_buffer;
 869 }
 870
 871 /*********************************************************************
 872  *              _wasctime (MSVCRT.@)
 873  */
 874 MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
 875 {
 876     thread_data_t *data = msvcrt_get_thread_data();
 877     struct tm tm;
 878     char buffer[30];
 879
 880     msvcrt_tm_to_unix( &tm, mstm );
 881
 882     if (!data->wasctime_buffer)
 883         data->wasctime_buffer = MSVCRT_malloc( 30*sizeof(MSVCRT_wchar_t) ); /* ought to be enough */
 884 #ifdef HAVE_ASCTIME_R
 885     asctime_r( &tm, buffer );
 886 #else
 887     strcpy( buffer, asctime(&tm) );
 888 #endif
 889     MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, data->wasctime_buffer, 30 );
 890     return data->wasctime_buffer;
 891 }
 892
 893 /*********************************************************************
 894  *              _ctime64 (MSVCRT.@)
 895  */
 896 char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
 897 {
 898     struct MSVCRT_tm *t;
 899     t = MSVCRT__localtime64( time );
 900     if (!t) return NULL;
 901     return MSVCRT_asctime( t );
 902 }
 903
 904 /*********************************************************************
 905  *              _ctime64_s (MSVCRT.@)
 906  */
 907 int CDECL MSVCRT__ctime64_s(char *res, MSVCRT_size_t len, const MSVCRT___time64_t *time)
 908 {
 909     struct MSVCRT_tm *t;
 910     if( !MSVCRT_CHECK_PMT( res != NULL ) || !MSVCRT_CHECK_PMT( len >= 26 ) )
 911     {
 912         *MSVCRT__errno() = MSVCRT_EINVAL;
 913         return MSVCRT_EINVAL;
 914     }
 915     res[0] = '\0';
 916     if( !MSVCRT_CHECK_PMT( time != NULL ) || !MSVCRT_CHECK_PMT( *time > 0 ) )
 917     {
 918         *MSVCRT__errno() = MSVCRT_EINVAL;
 919         return MSVCRT_EINVAL;
 920     }
 921     t = MSVCRT__localtime64( time );
 922     strcpy( res, MSVCRT_asctime( t ) );
 923     return 0;
 924 }
 925
 926 /*********************************************************************
 927  *              _ctime32 (MSVCRT.@)
 928  */
 929 char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
 930 {
 931     struct MSVCRT_tm *t;
 932     t = MSVCRT__localtime32( time );
 933     if (!t) return NULL;
 934     return MSVCRT_asctime( t );
 935 }
 936
 937 /*********************************************************************
 938  *              _ctime32_s (MSVCRT.@)
 939  */
 940 int CDECL MSVCRT__ctime32_s(char *res, MSVCRT_size_t len, const MSVCRT___time32_t *time)
 941 {
 942     struct MSVCRT_tm *t;
 943     if( !MSVCRT_CHECK_PMT( res != NULL ) || !MSVCRT_CHECK_PMT( len >= 26 ) )
 944     {
 945         *MSVCRT__errno() = MSVCRT_EINVAL;
 946         return MSVCRT_EINVAL;
 947     }
 948     res[0] = '\0';
 949     if( !MSVCRT_CHECK_PMT( time != NULL ) || !MSVCRT_CHECK_PMT( *time > 0 ) )
 950     {
 951         *MSVCRT__errno() = MSVCRT_EINVAL;
 952         return MSVCRT_EINVAL;
 953     }
 954     t = MSVCRT__localtime32( time );
 955     strcpy( res, MSVCRT_asctime( t ) );
 956     return 0;
 957 }
 958
 959 /*********************************************************************
 960  *              ctime (MSVCRT.@)
 961  */
 962 #ifdef _WIN64
 963 char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
 964 {
 965     return MSVCRT__ctime64( time );
 966 }
 967 #else
 968 char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
 969 {
 970     return MSVCRT__ctime32( time );
 971 }
 972 #endif
 973
 974 /*********************************************************************
 975  *              _wctime64 (MSVCRT.@)
 976  */
 977 MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
 978 {
 979     return MSVCRT__wasctime( MSVCRT__localtime64(time) );
 980 }
 981
 982 /*********************************************************************
 983  *              _wctime32 (MSVCRT.@)
 984  */
 985 MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
 986 {
 987     return MSVCRT__wasctime( MSVCRT__localtime32(time) );
 988 }
 989
 990 /*********************************************************************
 991  *              _wctime (MSVCRT.@)
 992  */
 993 #ifdef _WIN64
 994 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
 995 {
 996     return MSVCRT__wctime64( time );
 997 }
 998 #else
 999 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
1000 {
1001     return MSVCRT__wctime32( time );
1002 }
1003 #endif