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 #include "wine/unicode.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  42
  43 static const int MonthLengths[2][12] =
  44 {
  45     { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
  46     { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
  47 };
  48
  49 static inline int IsLeapYear(int Year)
  50 {
  51     return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
  52 }
  53
  54 static inline void msvcrt_tm_to_unix( struct tm *dest, const struct MSVCRT_tm *src )
  55 {
  56     memset( dest, 0, sizeof(*dest) );
  57     dest->tm_sec   = src->tm_sec;
  58     dest->tm_min   = src->tm_min;
  59     dest->tm_hour  = src->tm_hour;
  60     dest->tm_mday  = src->tm_mday;
  61     dest->tm_mon   = src->tm_mon;
  62     dest->tm_year  = src->tm_year;
  63     dest->tm_wday  = src->tm_wday;
  64     dest->tm_yday  = src->tm_yday;
  65     dest->tm_isdst = src->tm_isdst;
  66 }
  67
  68 static inline void unix_tm_to_msvcrt( struct MSVCRT_tm *dest, const struct tm *src )
  69 {
  70     memset( dest, 0, sizeof(*dest) );
  71     dest->tm_sec   = src->tm_sec;
  72     dest->tm_min   = src->tm_min;
  73     dest->tm_hour  = src->tm_hour;
  74     dest->tm_mday  = src->tm_mday;
  75     dest->tm_mon   = src->tm_mon;
  76     dest->tm_year  = src->tm_year;
  77     dest->tm_wday  = src->tm_wday;
  78     dest->tm_yday  = src->tm_yday;
  79     dest->tm_isdst = src->tm_isdst;
  80 }
  81
  82 static inline void write_invalid_msvcrt_tm( struct MSVCRT_tm *tm )
  83 {
  84     tm->tm_sec = -1;
  85     tm->tm_min = -1;
  86     tm->tm_hour = -1;
  87     tm->tm_mday = -1;
  88     tm->tm_mon = -1;
  89     tm->tm_year = -1;
  90     tm->tm_wday = -1;
  91     tm->tm_yday = -1;
  92     tm->tm_isdst = -1;
  93 }
  94
  95 #define SECSPERDAY        86400
  96 /* 1601 to 1970 is 369 years plus 89 leap days */
  97 #define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
  98 #define TICKSPERSEC       10000000
  99 #define TICKSPERMSEC      10000
 100 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
 101
 102 /**********************************************************************
 103  *              _mktime64 (MSVCRT.@)
 104  */
 105 MSVCRT___time64_t CDECL MSVCRT__mktime64(struct MSVCRT_tm *mstm)
 106 {
 107     time_t secs;
 108     struct tm tm;
 109
 110     msvcrt_tm_to_unix( &tm, mstm );
 111     secs = mktime( &tm );
 112     unix_tm_to_msvcrt( mstm, &tm );
 113
 114     return secs < 0 ? -1 : secs;
 115 }
 116
 117 /**********************************************************************
 118  *              _mktime32 (MSVCRT.@)
 119  */
 120 MSVCRT___time32_t CDECL MSVCRT__mktime32(struct MSVCRT_tm *mstm)
 121 {
 122     return MSVCRT__mktime64( mstm );
 123 }
 124
 125 /**********************************************************************
 126  *              mktime (MSVCRT.@)
 127  */
 128 #ifdef _WIN64
 129 MSVCRT___time64_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 130 {
 131     return MSVCRT__mktime64( mstm );
 132 }
 133 #else
 134 MSVCRT___time32_t CDECL MSVCRT_mktime(struct MSVCRT_tm *mstm)
 135 {
 136     return MSVCRT__mktime32( mstm );
 137 }
 138 #endif
 139
 140 /**********************************************************************
 141  *              _mkgmtime64 (MSVCRT.@)
 142  *
 143  * time->tm_isdst value is ignored
 144  */
 145 MSVCRT___time64_t CDECL MSVCRT__mkgmtime64(struct MSVCRT_tm *time)
 146 {
 147     SYSTEMTIME st;
 148     FILETIME ft;
 149     MSVCRT___time64_t ret;
 150     int i;
 151
 152     st.wMilliseconds = 0;
 153     st.wSecond = time->tm_sec;
 154     st.wMinute = time->tm_min;
 155     st.wHour = time->tm_hour;
 156     st.wDay = time->tm_mday;
 157     st.wMonth = time->tm_mon+1;
 158     st.wYear = time->tm_year+1900;
 159
 160     if(!SystemTimeToFileTime(&st, &ft))
 161         return -1;
 162
 163     FileTimeToSystemTime(&ft, &st);
 164     time->tm_wday = st.wDayOfWeek;
 165
 166     for(i=time->tm_yday=0; i<st.wMonth-1; i++)
 167         time->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 168     time->tm_yday += st.wDay-1;
 169
 170     ret = ((MSVCRT___time64_t)ft.dwHighDateTime<<32)+ft.dwLowDateTime;
 171     ret = (ret-TICKS_1601_TO_1970)/TICKSPERSEC;
 172     return ret;
 173 }
 174
 175 /**********************************************************************
 176  *              _mkgmtime32 (MSVCRT.@)
 177  */
 178 MSVCRT___time32_t CDECL MSVCRT__mkgmtime32(struct MSVCRT_tm *time)
 179 {
 180     return MSVCRT__mkgmtime64(time);
 181 }
 182
 183 /**********************************************************************
 184  *              _mkgmtime (MSVCRT.@)
 185  */
 186 #ifdef _WIN64
 187 MSVCRT___time64_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 188 {
 189     return MSVCRT__mkgmtime64(time);
 190 }
 191 #else
 192 MSVCRT___time32_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 193 {
 194     return MSVCRT__mkgmtime32(time);
 195 }
 196 #endif
 197
 198 /*********************************************************************
 199  *      _localtime64 (MSVCRT.@)
 200  */
 201 struct MSVCRT_tm* CDECL MSVCRT__localtime64(const MSVCRT___time64_t* secs)
 202 {
 203     struct tm *tm;
 204     thread_data_t *data;
 205     time_t seconds = *secs;
 206
 207     if (seconds < 0) return NULL;
 208
 209     _mlock(_TIME_LOCK);
 210     if (!(tm = localtime( &seconds))) {
 211         _munlock(_TIME_LOCK);
 212         return NULL;
 213     }
 214
 215     data = msvcrt_get_thread_data();
 216     if(!data->time_buffer)
 217         data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));
 218
 219     unix_tm_to_msvcrt( data->time_buffer, tm );
 220     _munlock(_TIME_LOCK);
 221
 222     return data->time_buffer;
 223 }
 224
 225 /*********************************************************************
 226  *      _localtime64_s (MSVCRT.@)
 227  */
 228 int CDECL _localtime64_s(struct MSVCRT_tm *time, const MSVCRT___time64_t *secs)
 229 {
 230     struct tm *tm;
 231     time_t seconds;
 232
 233     if (!time || !secs || *secs < 0 || *secs > _MAX__TIME64_T)
 234     {
 235         if (time)
 236             write_invalid_msvcrt_tm(time);
 237
 238         *MSVCRT__errno() = MSVCRT_EINVAL;
 239         return MSVCRT_EINVAL;
 240     }
 241
 242     seconds = *secs;
 243
 244     _mlock(_TIME_LOCK);
 245     if (!(tm = localtime(&seconds)))
 246     {
 247         _munlock(_TIME_LOCK);
 248         *MSVCRT__errno() = MSVCRT_EINVAL;
 249         return MSVCRT_EINVAL;
 250     }
 251
 252     unix_tm_to_msvcrt(time, tm);
 253     _munlock(_TIME_LOCK);
 254     return 0;
 255 }
 256
 257 /*********************************************************************
 258  *      _localtime32 (MSVCRT.@)
 259  */
 260 struct MSVCRT_tm* CDECL MSVCRT__localtime32(const MSVCRT___time32_t* secs)
 261 {
 262     MSVCRT___time64_t secs64 = *secs;
 263     return MSVCRT__localtime64( &secs64 );
 264 }
 265
 266 /*********************************************************************
 267  *      _localtime32_s (MSVCRT.@)
 268  */
 269 int CDECL _localtime32_s(struct MSVCRT_tm *time, const MSVCRT___time32_t *secs)
 270 {
 271     MSVCRT___time64_t secs64;
 272
 273     if (!time || !secs || *secs < 0)
 274     {
 275         if (time)
 276             write_invalid_msvcrt_tm(time);
 277
 278         *MSVCRT__errno() = MSVCRT_EINVAL;
 279         return MSVCRT_EINVAL;
 280     }
 281
 282     secs64 = *secs;
 283     return _localtime64_s(time, &secs64);
 284 }
 285
 286 /*********************************************************************
 287  *      localtime (MSVCRT.@)
 288  */
 289 #ifdef _WIN64
 290 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time64_t* secs)
 291 {
 292     return MSVCRT__localtime64( secs );
 293 }
 294 #else
 295 struct MSVCRT_tm* CDECL MSVCRT_localtime(const MSVCRT___time32_t* secs)
 296 {
 297     return MSVCRT__localtime32( secs );
 298 }
 299 #endif
 300
 301 /*********************************************************************
 302  *      _gmtime64 (MSVCRT.@)
 303  */
 304 int CDECL MSVCRT__gmtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
 305 {
 306     int i;
 307     FILETIME ft;
 308     SYSTEMTIME st;
 309     ULONGLONG time;
 310
 311     if (!res || !secs || *secs < 0) {
 312         if (res) {
 313             write_invalid_msvcrt_tm(res);
 314         }
 315
 316         *MSVCRT__errno() = MSVCRT_EINVAL;
 317         return MSVCRT_EINVAL;
 318     }
 319
 320     time = *secs * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 321
 322     ft.dwHighDateTime = (UINT)(time >> 32);
 323     ft.dwLowDateTime  = (UINT)time;
 324
 325     FileTimeToSystemTime(&ft, &st);
 326
 327     res->tm_sec  = st.wSecond;
 328     res->tm_min  = st.wMinute;
 329     res->tm_hour = st.wHour;
 330     res->tm_mday = st.wDay;
 331     res->tm_year = st.wYear - 1900;
 332     res->tm_mon  = st.wMonth - 1;
 333     res->tm_wday = st.wDayOfWeek;
 334     for (i = res->tm_yday = 0; i < st.wMonth - 1; i++) {
 335         res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
 336     }
 337
 338     res->tm_yday += st.wDay - 1;
 339     res->tm_isdst = 0;
 340
 341     return 0;
 342 }
 343
 344 /*********************************************************************
 345  *      _gmtime64 (MSVCRT.@)
 346  */
 347 struct MSVCRT_tm* CDECL MSVCRT__gmtime64(const MSVCRT___time64_t *secs)
 348 {
 349     thread_data_t * const data = msvcrt_get_thread_data();
 350
 351     if(!data->time_buffer)
 352         data->time_buffer = MSVCRT_malloc(sizeof(struct MSVCRT_tm));
 353
 354     if(MSVCRT__gmtime64_s(data->time_buffer, secs))
 355         return NULL;
 356     return data->time_buffer;
 357 }
 358
 359 /*********************************************************************
 360  *      _gmtime32_s (MSVCRT.@)
 361  */
 362 int CDECL MSVCRT__gmtime32_s(struct MSVCRT_tm *res, const MSVCRT___time32_t *secs)
 363 {
 364     MSVCRT___time64_t secs64;
 365
 366     if(secs) {
 367         secs64 = *secs;
 368         return MSVCRT__gmtime64_s(res, &secs64);
 369     }
 370     return MSVCRT__gmtime64_s(res, NULL);
 371 }
 372
 373 /*********************************************************************
 374  *      _gmtime32 (MSVCRT.@)
 375  */
 376 struct MSVCRT_tm* CDECL MSVCRT__gmtime32(const MSVCRT___time32_t* secs)
 377 {
 378     MSVCRT___time64_t secs64;
 379
 380     if(!secs)
 381         return NULL;
 382
 383     secs64 = *secs;
 384     return MSVCRT__gmtime64( &secs64 );
 385 }
 386
 387 /*********************************************************************
 388  *      gmtime (MSVCRT.@)
 389  */
 390 #ifdef _WIN64
 391 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time64_t* secs)
 392 {
 393     return MSVCRT__gmtime64( secs );
 394 }
 395 #else
 396 struct MSVCRT_tm* CDECL MSVCRT_gmtime(const MSVCRT___time32_t* secs)
 397 {
 398     return MSVCRT__gmtime32( secs );
 399 }
 400 #endif
 401
 402 /**********************************************************************
 403  *              _strdate (MSVCRT.@)
 404  */
 405 char* CDECL MSVCRT__strdate(char* date)
 406 {
 407   static const char format[] = "MM'/'dd'/'yy";
 408
 409   GetDateFormatA(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 410
 411   return date;
 412 }
 413
 414 /**********************************************************************
 415  *              _strdate_s (MSVCRT.@)
 416  */
 417 int CDECL _strdate_s(char* date, MSVCRT_size_t size)
 418 {
 419     if(date && size)
 420         date[0] = '\0';
 421
 422     if(!date) {
 423         *MSVCRT__errno() = MSVCRT_EINVAL;
 424         return MSVCRT_EINVAL;
 425     }
 426
 427     if(size < 9) {
 428         *MSVCRT__errno() = MSVCRT_ERANGE;
 429         return MSVCRT_ERANGE;
 430     }
 431
 432     MSVCRT__strdate(date);
 433     return 0;
 434 }
 435
 436 /**********************************************************************
 437  *              _wstrdate (MSVCRT.@)
 438  */
 439 MSVCRT_wchar_t* CDECL MSVCRT__wstrdate(MSVCRT_wchar_t* date)
 440 {
 441   static const WCHAR format[] = { 'M','M','\'','/','\'','d','d','\'','/','\'','y','y',0 };
 442
 443   GetDateFormatW(LOCALE_NEUTRAL, 0, NULL, format, date, 9);
 444
 445   return date;
 446 }
 447
 448 /**********************************************************************
 449  *              _wstrdate_s (MSVCRT.@)
 450  */
 451 int CDECL _wstrdate_s(MSVCRT_wchar_t* date, MSVCRT_size_t size)
 452 {
 453     if(date && size)
 454         date[0] = '\0';
 455
 456     if(!date) {
 457         *MSVCRT__errno() = MSVCRT_EINVAL;
 458         return MSVCRT_EINVAL;
 459     }
 460
 461     if(size < 9) {
 462         *MSVCRT__errno() = MSVCRT_ERANGE;
 463         return MSVCRT_ERANGE;
 464     }
 465
 466     MSVCRT__wstrdate(date);
 467     return 0;
 468 }
 469
 470 /*********************************************************************
 471  *              _strtime (MSVCRT.@)
 472  */
 473 char* CDECL MSVCRT__strtime(char* time)
 474 {
 475   static const char format[] = "HH':'mm':'ss";
 476
 477   GetTimeFormatA(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 478
 479   return time;
 480 }
 481
 482 /*********************************************************************
 483  *              _strtime_s (MSVCRT.@)
 484  */
 485 int CDECL _strtime_s(char* time, MSVCRT_size_t size)
 486 {
 487     if(time && size)
 488         time[0] = '\0';
 489
 490     if(!time) {
 491         *MSVCRT__errno() = MSVCRT_EINVAL;
 492         return MSVCRT_EINVAL;
 493     }
 494
 495     if(size < 9) {
 496         *MSVCRT__errno() = MSVCRT_ERANGE;
 497         return MSVCRT_ERANGE;
 498     }
 499
 500     MSVCRT__strtime(time);
 501     return 0;
 502 }
 503
 504 /*********************************************************************
 505  *              _wstrtime (MSVCRT.@)
 506  */
 507 MSVCRT_wchar_t* CDECL MSVCRT__wstrtime(MSVCRT_wchar_t* time)
 508 {
 509   static const WCHAR format[] = { 'H','H','\'',':','\'','m','m','\'',':','\'','s','s',0 };
 510
 511   GetTimeFormatW(LOCALE_NEUTRAL, 0, NULL, format, time, 9);
 512
 513   return time;
 514 }
 515
 516 /*********************************************************************
 517  *              _wstrtime_s (MSVCRT.@)
 518  */
 519 int CDECL _wstrtime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size)
 520 {
 521     if(time && size)
 522         time[0] = '\0';
 523
 524     if(!time) {
 525         *MSVCRT__errno() = MSVCRT_EINVAL;
 526         return MSVCRT_EINVAL;
 527     }
 528
 529     if(size < 9) {
 530         *MSVCRT__errno() = MSVCRT_ERANGE;
 531         return MSVCRT_ERANGE;
 532     }
 533
 534     MSVCRT__wstrtime(time);
 535     return 0;
 536 }
 537
 538 /*********************************************************************
 539  *              clock (MSVCRT.@)
 540  */
 541 MSVCRT_clock_t CDECL MSVCRT_clock(void)
 542 {
 543   FILETIME ftc, fte, ftk, ftu;
 544   ULONGLONG utime, ktime;
 545
 546   MSVCRT_clock_t clock;
 547
 548   GetProcessTimes(GetCurrentProcess(), &ftc, &fte, &ftk, &ftu);
 549
 550   ktime = ((ULONGLONG)ftk.dwHighDateTime << 32) | ftk.dwLowDateTime;
 551   utime = ((ULONGLONG)ftu.dwHighDateTime << 32) | ftu.dwLowDateTime;
 552
 553   clock = (utime + ktime) / (TICKSPERSEC / MSVCRT_CLOCKS_PER_SEC);
 554
 555   return clock;
 556 }
 557
 558 /*********************************************************************
 559  *              _difftime64 (MSVCRT.@)
 560  */
 561 double CDECL MSVCRT__difftime64(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 562 {
 563   return (double)(time1 - time2);
 564 }
 565
 566 /*********************************************************************
 567  *              _difftime32 (MSVCRT.@)
 568  */
 569 double CDECL MSVCRT__difftime32(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 570 {
 571   return (double)(time1 - time2);
 572 }
 573
 574 /*********************************************************************
 575  *              difftime (MSVCRT.@)
 576  */
 577 #ifdef _WIN64
 578 double CDECL MSVCRT_difftime(MSVCRT___time64_t time1, MSVCRT___time64_t time2)
 579 {
 580     return MSVCRT__difftime64( time1, time2 );
 581 }
 582 #else
 583 double CDECL MSVCRT_difftime(MSVCRT___time32_t time1, MSVCRT___time32_t time2)
 584 {
 585     return MSVCRT__difftime32( time1, time2 );
 586 }
 587 #endif
 588
 589 /*********************************************************************
 590  *              _ftime64 (MSVCRT.@)
 591  */
 592 void CDECL MSVCRT__ftime64(struct MSVCRT___timeb64 *buf)
 593 {
 594   TIME_ZONE_INFORMATION tzinfo;
 595   FILETIME ft;
 596   ULONGLONG time;
 597
 598   DWORD tzid = GetTimeZoneInformation(&tzinfo);
 599   GetSystemTimeAsFileTime(&ft);
 600
 601   time = ((ULONGLONG)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
 602
 603   buf->time = time / TICKSPERSEC - SECS_1601_TO_1970;
 604   buf->millitm = (time % TICKSPERSEC) / TICKSPERMSEC;
 605   buf->timezone = tzinfo.Bias +
 606       ( tzid == TIME_ZONE_ID_STANDARD ? tzinfo.StandardBias :
 607       ( tzid == TIME_ZONE_ID_DAYLIGHT ? tzinfo.DaylightBias : 0 ));
 608   buf->dstflag = (tzid == TIME_ZONE_ID_DAYLIGHT?1:0);
 609 }
 610
 611 /*********************************************************************
 612  *              _ftime64_s (MSVCRT.@)
 613  */
 614 int CDECL MSVCRT__ftime64_s(struct MSVCRT___timeb64 *buf)
 615 {
 616     if( !MSVCRT_CHECK_PMT( buf != NULL ) )
 617     {
 618         *MSVCRT__errno() = MSVCRT_EINVAL;
 619         return MSVCRT_EINVAL;
 620     }
 621     MSVCRT__ftime64(buf);
 622     return 0;
 623 }
 624
 625 /*********************************************************************
 626  *              _ftime32 (MSVCRT.@)
 627  */
 628 void CDECL MSVCRT__ftime32(struct MSVCRT___timeb32 *buf)
 629 {
 630     struct MSVCRT___timeb64 buf64;
 631
 632     MSVCRT__ftime64( &buf64 );
 633     buf->time     = buf64.time;
 634     buf->millitm  = buf64.millitm;
 635     buf->timezone = buf64.timezone;
 636     buf->dstflag  = buf64.dstflag;
 637 }
 638
 639 /*********************************************************************
 640  *              _ftime32_s (MSVCRT.@)
 641  */
 642 int CDECL MSVCRT__ftime32_s(struct MSVCRT___timeb32 *buf)
 643 {
 644     if( !MSVCRT_CHECK_PMT( buf != NULL ) )
 645     {
 646         *MSVCRT__errno() = MSVCRT_EINVAL;
 647         return MSVCRT_EINVAL;
 648     }
 649     MSVCRT__ftime32(buf);
 650     return 0;
 651 }
 652
 653 /*********************************************************************
 654  *              _ftime (MSVCRT.@)
 655  */
 656 #ifdef _WIN64
 657 void CDECL MSVCRT__ftime(struct MSVCRT___timeb64 *buf)
 658 {
 659     MSVCRT__ftime64( buf );
 660 }
 661 #else
 662 void CDECL MSVCRT__ftime(struct MSVCRT___timeb32 *buf)
 663 {
 664     MSVCRT__ftime32( buf );
 665 }
 666 #endif
 667
 668 /*********************************************************************
 669  *              _time64 (MSVCRT.@)
 670  */
 671 MSVCRT___time64_t CDECL MSVCRT__time64(MSVCRT___time64_t *buf)
 672 {
 673     MSVCRT___time64_t curtime;
 674     struct MSVCRT___timeb64 tb;
 675
 676     MSVCRT__ftime64(&tb);
 677
 678     curtime = tb.time;
 679     return buf ? *buf = curtime : curtime;
 680 }
 681
 682 /*********************************************************************
 683  *              _time32 (MSVCRT.@)
 684  */
 685 MSVCRT___time32_t CDECL MSVCRT__time32(MSVCRT___time32_t *buf)
 686 {
 687     MSVCRT___time32_t curtime;
 688     struct MSVCRT___timeb64 tb;
 689
 690     MSVCRT__ftime64(&tb);
 691
 692     curtime = tb.time;
 693     return buf ? *buf = curtime : curtime;
 694 }
 695
 696 /*********************************************************************
 697  *              time (MSVCRT.@)
 698  */
 699 #ifdef _WIN64
 700 MSVCRT___time64_t CDECL MSVCRT_time(MSVCRT___time64_t* buf)
 701 {
 702     return MSVCRT__time64( buf );
 703 }
 704 #else
 705 MSVCRT___time32_t CDECL MSVCRT_time(MSVCRT___time32_t* buf)
 706 {
 707     return MSVCRT__time32( buf );
 708 }
 709 #endif
 710
 711 /*********************************************************************
 712  *              _daylight (MSVCRT.@)
 713  */
 714 int MSVCRT___daylight = 0;
 715
 716 /*********************************************************************
 717  *              __p_daylight (MSVCRT.@)
 718  */
 719 int * CDECL MSVCRT___p__daylight(void)
 720 {
 721         return &MSVCRT___daylight;
 722 }
 723
 724 /*********************************************************************
 725  *              _dstbias (MSVCRT.@)
 726  */
 727 int MSVCRT__dstbias = 0;
 728
 729 /*********************************************************************
 730  *              __p_dstbias (MSVCRT.@)
 731  */
 732 int * CDECL __p__dstbias(void)
 733 {
 734     return &MSVCRT__dstbias;
 735 }
 736
 737 /*********************************************************************
 738  *              _timezone (MSVCRT.@)
 739  */
 740 MSVCRT_long MSVCRT___timezone = 0;
 741
 742 /*********************************************************************
 743  *              __p_timezone (MSVCRT.@)
 744  */
 745 MSVCRT_long * CDECL MSVCRT___p__timezone(void)
 746 {
 747         return &MSVCRT___timezone;
 748 }
 749
 750 /*********************************************************************
 751  *              _tzname (MSVCRT.@)
 752  * NOTES
 753  *  Some apps (notably Mozilla) insist on writing to these, so the buffer
 754  *  must be large enough.  The size is picked based on observation of
 755  *  Windows XP.
 756  */
 757 static char tzname_std[64] = "PST";
 758 static char tzname_dst[64] = "PDT";
 759 char *MSVCRT__tzname[2] = { tzname_std, tzname_dst };
 760
 761 /*********************************************************************
 762  *              _get_tzname (MSVCRT.@)
 763  */
 764 int CDECL MSVCRT__get_tzname(MSVCRT_size_t *ret, char *buf, MSVCRT_size_t bufsize, int index)
 765 {
 766     char *timezone;
 767
 768     switch(index)
 769     {
 770     case 0:
 771         timezone = tzname_std;
 772         break;
 773     case 1:
 774         timezone = tzname_dst;
 775         break;
 776     default:
 777         *MSVCRT__errno() = MSVCRT_EINVAL;
 778         return MSVCRT_EINVAL;
 779     }
 780
 781     if(!ret || (!buf && bufsize > 0) || (buf && !bufsize))
 782     {
 783         *MSVCRT__errno() = MSVCRT_EINVAL;
 784         return MSVCRT_EINVAL;
 785     }
 786
 787     *ret = strlen(timezone)+1;
 788     if(!buf && !bufsize)
 789         return 0;
 790
 791     strcpy(buf, timezone);
 792     return 0;
 793 }
 794
 795 /*********************************************************************
 796  *              __p_tzname (MSVCRT.@)
 797  */
 798 char ** CDECL __p__tzname(void)
 799 {
 800         return MSVCRT__tzname;
 801 }
 802
 803 /*********************************************************************
 804  *              _tzset (MSVCRT.@)
 805  */
 806 void CDECL MSVCRT__tzset(void)
 807 {
 808     tzset();
 809 #if defined(HAVE_TIMEZONE) && defined(HAVE_DAYLIGHT)
 810     MSVCRT___daylight = daylight;
 811     MSVCRT___timezone = timezone;
 812 #else
 813     {
 814         static const time_t seconds_in_year = (365 * 24 + 6) * 3600;
 815         time_t t;
 816         struct tm *tmp;
 817         int zone_january, zone_july;
 818
 819         _mlock(_TIME_LOCK);
 820         t = (time(NULL) / seconds_in_year) * seconds_in_year;
 821         tmp = localtime(&t);
 822         zone_january = -tmp->tm_gmtoff;
 823         t += seconds_in_year / 2;
 824         tmp = localtime(&t);
 825         zone_july = -tmp->tm_gmtoff;
 826         _munlock(_TIME_LOCK);
 827
 828         MSVCRT___daylight = (zone_january != zone_july);
 829         MSVCRT___timezone = max(zone_january, zone_july);
 830     }
 831 #endif
 832     lstrcpynA(tzname_std, tzname[0], sizeof(tzname_std));
 833     tzname_std[sizeof(tzname_std) - 1] = '\0';
 834     lstrcpynA(tzname_dst, tzname[1], sizeof(tzname_dst));
 835     tzname_dst[sizeof(tzname_dst) - 1] = '\0';
 836 }
 837
 838 /*********************************************************************
 839  *              strftime (MSVCRT.@)
 840  */
 841 MSVCRT_size_t CDECL MSVCRT_strftime( char *str, MSVCRT_size_t max, const char *format,
 842                                      const struct MSVCRT_tm *mstm )
 843 {
 844     struct tm tm;
 845
 846     msvcrt_tm_to_unix( &tm, mstm );
 847     return strftime( str, max, format, &tm );
 848 }
 849
 850 /*********************************************************************
 851  *              wcsftime (MSVCRT.@)
 852  */
 853 MSVCRT_size_t CDECL MSVCRT_wcsftime( MSVCRT_wchar_t *str, MSVCRT_size_t max,
 854                                      const MSVCRT_wchar_t *format, const struct MSVCRT_tm *mstm )
 855 {
 856     char *s, *fmt;
 857     MSVCRT_size_t len;
 858
 859     TRACE("%p %ld %s %p\n", str, max, debugstr_w(format), mstm );
 860
 861     len = WideCharToMultiByte( CP_UNIXCP, 0, format, -1, NULL, 0, NULL, NULL );
 862     if (!(fmt = MSVCRT_malloc( len ))) return 0;
 863     WideCharToMultiByte( CP_UNIXCP, 0, format, -1, fmt, len, NULL, NULL );
 864
 865     if ((s = MSVCRT_malloc( max*4 )))
 866     {
 867         struct tm tm;
 868         msvcrt_tm_to_unix( &tm, mstm );
 869         if (!strftime( s, max*4, fmt, &tm )) s[0] = 0;
 870         len = MultiByteToWideChar( CP_UNIXCP, 0, s, -1, str, max );
 871         if (len) len--;
 872         MSVCRT_free( s );
 873     }
 874     else len = 0;
 875
 876     MSVCRT_free( fmt );
 877     return len;
 878 }
 879
 880 /*********************************************************************
 881  *              asctime (MSVCRT.@)
 882  */
 883 char * CDECL MSVCRT_asctime(const struct MSVCRT_tm *mstm)
 884 {
 885     char bufferA[30];
 886     WCHAR bufferW[30];
 887
 888     thread_data_t *data = msvcrt_get_thread_data();
 889     struct tm tm;
 890
 891     msvcrt_tm_to_unix( &tm, mstm );
 892
 893     if (!data->asctime_buffer)
 894         data->asctime_buffer = MSVCRT_malloc( 30 ); /* ought to be enough */
 895
 896 #ifdef HAVE_ASCTIME_R
 897     asctime_r( &tm, bufferA );
 898 #else
 899     strcpy( bufferA, asctime(&tm) );
 900 #endif
 901     MultiByteToWideChar( CP_UNIXCP, 0, bufferA, -1, bufferW, 30 );
 902     WideCharToMultiByte( CP_ACP, 0, bufferW, -1, data->asctime_buffer, 30, NULL, NULL );
 903     return data->asctime_buffer;
 904 }
 905
 906 /*********************************************************************
 907  *      asctime_s (MSVCRT.@)
 908  */
 909 int CDECL MSVCRT_asctime_s(char* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
 910 {
 911     char* asc;
 912     unsigned int len;
 913
 914     if (!MSVCRT_CHECK_PMT(time != NULL) || !MSVCRT_CHECK_PMT(mstm != NULL)) {
 915         *MSVCRT__errno() = MSVCRT_EINVAL;
 916         return MSVCRT_EINVAL;
 917     }
 918
 919     asc = MSVCRT_asctime(mstm);
 920     len = strlen(asc) + 1;
 921
 922     if(!MSVCRT_CHECK_PMT(size >= len)) {
 923         *MSVCRT__errno() = MSVCRT_ERANGE;
 924         return MSVCRT_ERANGE;
 925     }
 926
 927     strcpy(time, asc);
 928     return 0;
 929 }
 930
 931 /*********************************************************************
 932  *              _wasctime (MSVCRT.@)
 933  */
 934 MSVCRT_wchar_t * CDECL MSVCRT__wasctime(const struct MSVCRT_tm *mstm)
 935 {
 936     thread_data_t *data = msvcrt_get_thread_data();
 937     struct tm tm;
 938     char buffer[30];
 939
 940     msvcrt_tm_to_unix( &tm, mstm );
 941
 942     if (!data->wasctime_buffer)
 943         data->wasctime_buffer = MSVCRT_malloc( 30*sizeof(MSVCRT_wchar_t) ); /* ought to be enough */
 944 #ifdef HAVE_ASCTIME_R
 945     asctime_r( &tm, buffer );
 946 #else
 947     strcpy( buffer, asctime(&tm) );
 948 #endif
 949     MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, data->wasctime_buffer, 30 );
 950     return data->wasctime_buffer;
 951 }
 952
 953 /*********************************************************************
 954  *      _wasctime_s (MSVCRT.@)
 955  */
 956 int CDECL MSVCRT__wasctime_s(MSVCRT_wchar_t* time, MSVCRT_size_t size, const struct MSVCRT_tm *mstm)
 957 {
 958     WCHAR* asc;
 959     unsigned int len;
 960
 961     if (!MSVCRT_CHECK_PMT(time != NULL) || !MSVCRT_CHECK_PMT(mstm != NULL)) {
 962         *MSVCRT__errno() = MSVCRT_EINVAL;
 963         return MSVCRT_EINVAL;
 964     }
 965
 966     asc = MSVCRT__wasctime(mstm);
 967     len = (strlenW(asc) + 1) * sizeof(WCHAR);
 968
 969     if(!MSVCRT_CHECK_PMT(size >= len)) {
 970         *MSVCRT__errno() = MSVCRT_ERANGE;
 971         return MSVCRT_ERANGE;
 972     }
 973
 974     strcpyW(time, asc);
 975     return 0;
 976 }
 977
 978 /*********************************************************************
 979  *              _ctime64 (MSVCRT.@)
 980  */
 981 char * CDECL MSVCRT__ctime64(const MSVCRT___time64_t *time)
 982 {
 983     struct MSVCRT_tm *t;
 984     t = MSVCRT__localtime64( time );
 985     if (!t) return NULL;
 986     return MSVCRT_asctime( t );
 987 }
 988
 989 /*********************************************************************
 990  *              _ctime64_s (MSVCRT.@)
 991  */
 992 int CDECL MSVCRT__ctime64_s(char *res, MSVCRT_size_t len, const MSVCRT___time64_t *time)
 993 {
 994     struct MSVCRT_tm *t;
 995     if( !MSVCRT_CHECK_PMT( res != NULL ) || !MSVCRT_CHECK_PMT( len >= 26 ) )
 996     {
 997         *MSVCRT__errno() = MSVCRT_EINVAL;
 998         return MSVCRT_EINVAL;
 999     }
1000     res[0] = '\0';
1001     if( !MSVCRT_CHECK_PMT( time != NULL ) || !MSVCRT_CHECK_PMT( *time > 0 ) )
1002     {
1003         *MSVCRT__errno() = MSVCRT_EINVAL;
1004         return MSVCRT_EINVAL;
1005     }
1006     t = MSVCRT__localtime64( time );
1007     strcpy( res, MSVCRT_asctime( t ) );
1008     return 0;
1009 }
1010
1011 /*********************************************************************
1012  *              _ctime32 (MSVCRT.@)
1013  */
1014 char * CDECL MSVCRT__ctime32(const MSVCRT___time32_t *time)
1015 {
1016     struct MSVCRT_tm *t;
1017     t = MSVCRT__localtime32( time );
1018     if (!t) return NULL;
1019     return MSVCRT_asctime( t );
1020 }
1021
1022 /*********************************************************************
1023  *              _ctime32_s (MSVCRT.@)
1024  */
1025 int CDECL MSVCRT__ctime32_s(char *res, MSVCRT_size_t len, const MSVCRT___time32_t *time)
1026 {
1027     struct MSVCRT_tm *t;
1028     if( !MSVCRT_CHECK_PMT( res != NULL ) || !MSVCRT_CHECK_PMT( len >= 26 ) )
1029     {
1030         *MSVCRT__errno() = MSVCRT_EINVAL;
1031         return MSVCRT_EINVAL;
1032     }
1033     res[0] = '\0';
1034     if( !MSVCRT_CHECK_PMT( time != NULL ) || !MSVCRT_CHECK_PMT( *time > 0 ) )
1035     {
1036         *MSVCRT__errno() = MSVCRT_EINVAL;
1037         return MSVCRT_EINVAL;
1038     }
1039     t = MSVCRT__localtime32( time );
1040     strcpy( res, MSVCRT_asctime( t ) );
1041     return 0;
1042 }
1043
1044 /*********************************************************************
1045  *              ctime (MSVCRT.@)
1046  */
1047 #ifdef _WIN64
1048 char * CDECL MSVCRT_ctime(const MSVCRT___time64_t *time)
1049 {
1050     return MSVCRT__ctime64( time );
1051 }
1052 #else
1053 char * CDECL MSVCRT_ctime(const MSVCRT___time32_t *time)
1054 {
1055     return MSVCRT__ctime32( time );
1056 }
1057 #endif
1058
1059 /*********************************************************************
1060  *              _wctime64 (MSVCRT.@)
1061  */
1062 MSVCRT_wchar_t * CDECL MSVCRT__wctime64(const MSVCRT___time64_t *time)
1063 {
1064     return MSVCRT__wasctime( MSVCRT__localtime64(time) );
1065 }
1066
1067 /*********************************************************************
1068  *              _wctime32 (MSVCRT.@)
1069  */
1070 MSVCRT_wchar_t * CDECL MSVCRT__wctime32(const MSVCRT___time32_t *time)
1071 {
1072     return MSVCRT__wasctime( MSVCRT__localtime32(time) );
1073 }
1074
1075 /*********************************************************************
1076  *              _wctime (MSVCRT.@)
1077  */
1078 #ifdef _WIN64
1079 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time64_t *time)
1080 {
1081     return MSVCRT__wctime64( time );
1082 }
1083 #else
1084 MSVCRT_wchar_t * CDECL MSVCRT__wctime(const MSVCRT___time32_t *time)
1085 {
1086     return MSVCRT__wctime32( time );
1087 }
1088 #endif