dlls/kernel32/time.c

   1 /*
   2  * Win32 kernel time functions
   3  *
   4  * Copyright 1995 Martin von Loewis and Cameron Heide
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <string.h>
  24 #ifdef HAVE_UNISTD_H
  25 # include <unistd.h>
  26 #endif
  27 #include <stdarg.h>
  28 #include <stdlib.h>
  29 #include <time.h>
  30 #ifdef HAVE_SYS_TIME_H
  31 # include <sys/time.h>
  32 #endif
  33 #ifdef HAVE_SYS_TIMES_H
  34 # include <sys/times.h>
  35 #endif
  36 #ifdef HAVE_SYS_LIMITS_H
  37 #include <sys/limits.h>
  38 #elif defined(HAVE_MACHINE_LIMITS_H)
  39 #include <machine/limits.h>
  40 #endif
  41
  42 #define NONAMELESSUNION
  43 #define NONAMELESSSTRUCT
  44 #include "ntstatus.h"
  45 #define WIN32_NO_STATUS
  46 #include "windef.h"
  47 #include "winbase.h"
  48 #include "winternl.h"
  49 #include "kernel_private.h"
  50 #include "wine/unicode.h"
  51 #include "wine/debug.h"
  52
  53 WINE_DEFAULT_DEBUG_CHANNEL(time);
  54
  55 /* maximum time adjustment in seconds for SetLocalTime and SetSystemTime */
  56 #define SETTIME_MAX_ADJUST 120
  57 #define CALINFO_MAX_YEAR 2029
  58
  59 #define LL2FILETIME( ll, pft )\
  60     (pft)->dwLowDateTime = (UINT)(ll); \
  61     (pft)->dwHighDateTime = (UINT)((ll) >> 32);
  62 #define FILETIME2LL( pft, ll) \
  63     ll = (((LONGLONG)((pft)->dwHighDateTime))<<32) + (pft)-> dwLowDateTime ;
  64
  65
  66 static const int MonthLengths[2][12] =
  67 {
  68         { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
  69         { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
  70 };
  71
  72 static inline int IsLeapYear(int Year)
  73 {
  74         return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 1 : 0;
  75 }
  76
  77 /***********************************************************************
  78  *  TIME_DayLightCompareDate
  79  *
  80  * Compares two dates without looking at the year.
  81  *
  82  * PARAMS
  83  *   date        [in] The local time to compare.
  84  *   compareDate [in] The daylight saving begin or end date.
  85  *
  86  * RETURNS
  87  *
  88  *  -1 if date < compareDate
  89  *   0 if date == compareDate
  90  *   1 if date > compareDate
  91  *  -2 if an error occurs
  92  */
  93 static int TIME_DayLightCompareDate( const SYSTEMTIME *date,
  94     const SYSTEMTIME *compareDate )
  95 {
  96     int limit_day, dayinsecs;
  97
  98     if (date->wMonth < compareDate->wMonth)
  99         return -1; /* We are in a month before the date limit. */
 100
 101     if (date->wMonth > compareDate->wMonth)
 102         return 1; /* We are in a month after the date limit. */
 103
 104     if (compareDate->wDayOfWeek <= 6)
 105     {
 106         WORD First;
 107         /* compareDate->wDay is interpreted as number of the week in the month
 108          * 5 means: the last week in the month */
 109         int weekofmonth = compareDate->wDay;
 110           /* calculate the day of the first DayOfWeek in the month */
 111         First = ( 6 + compareDate->wDayOfWeek - date->wDayOfWeek + date->wDay
 112                ) % 7 + 1;
 113         limit_day = First + 7 * (weekofmonth - 1);
 114         /* check needed for the 5th weekday of the month */
 115         if(limit_day > MonthLengths[date->wMonth==2 && IsLeapYear(date->wYear)]
 116                 [date->wMonth - 1])
 117             limit_day -= 7;
 118     }
 119     else
 120     {
 121        limit_day = compareDate->wDay;
 122     }
 123
 124     /* convert to seconds */
 125     limit_day = ((limit_day * 24  + compareDate->wHour) * 60 +
 126             compareDate->wMinute ) * 60;
 127     dayinsecs = ((date->wDay * 24  + date->wHour) * 60 +
 128             date->wMinute ) * 60 + date->wSecond;
 129     /* and compare */
 130     return dayinsecs < limit_day ? -1 :
 131            dayinsecs > limit_day ? 1 :
 132            0;   /* date is equal to the date limit. */
 133 }
 134
 135 /***********************************************************************
 136  *  TIME_CompTimeZoneID
 137  *
 138  *  Computes the local time bias for a given time and time zone.
 139  *
 140  *  PARAMS
 141  *      pTZinfo     [in] The time zone data.
 142  *      lpFileTime  [in] The system or local time.
 143  *      islocal     [in] it is local time.
 144  *
 145  *  RETURNS
 146  *      TIME_ZONE_ID_INVALID    An error occurred
 147  *      TIME_ZONE_ID_UNKNOWN    There are no transition time known
 148  *      TIME_ZONE_ID_STANDARD   Current time is standard time
 149  *      TIME_ZONE_ID_DAYLIGHT   Current time is dayligh saving time
 150  */
 151 static BOOL TIME_CompTimeZoneID ( const TIME_ZONE_INFORMATION *pTZinfo,
 152     FILETIME *lpFileTime, BOOL islocal )
 153 {
 154     int ret;
 155     BOOL beforeStandardDate, afterDaylightDate;
 156     DWORD retval = TIME_ZONE_ID_INVALID;
 157     LONGLONG llTime = 0; /* initialized to prevent gcc complaining */
 158     SYSTEMTIME SysTime;
 159     FILETIME ftTemp;
 160
 161     if (pTZinfo->DaylightDate.wMonth != 0)
 162     {
 163         if (pTZinfo->StandardDate.wMonth == 0 ||
 164             pTZinfo->StandardDate.wDay<1 ||
 165             pTZinfo->StandardDate.wDay>5 ||
 166             pTZinfo->DaylightDate.wDay<1 ||
 167             pTZinfo->DaylightDate.wDay>5)
 168         {
 169             SetLastError(ERROR_INVALID_PARAMETER);
 170             return TIME_ZONE_ID_INVALID;
 171         }
 172
 173         if (!islocal) {
 174             FILETIME2LL( lpFileTime, llTime );
 175             llTime -= ( pTZinfo->Bias + pTZinfo->DaylightBias )
 176                 * (LONGLONG)600000000;
 177             LL2FILETIME( llTime, &ftTemp)
 178             lpFileTime = &ftTemp;
 179         }
 180
 181         FileTimeToSystemTime(lpFileTime, &SysTime);
 182
 183          /* check for daylight saving */
 184         ret = TIME_DayLightCompareDate( &SysTime, &pTZinfo->StandardDate);
 185         if (ret == -2)
 186           return TIME_ZONE_ID_INVALID;
 187
 188         beforeStandardDate = ret < 0;
 189
 190         if (!islocal) {
 191             llTime -= ( pTZinfo->StandardBias - pTZinfo->DaylightBias )
 192                 * (LONGLONG)600000000;
 193             LL2FILETIME( llTime, &ftTemp)
 194             FileTimeToSystemTime(lpFileTime, &SysTime);
 195         }
 196
 197         ret = TIME_DayLightCompareDate( &SysTime, &pTZinfo->DaylightDate);
 198         if (ret == -2)
 199           return TIME_ZONE_ID_INVALID;
 200
 201         afterDaylightDate = ret >= 0;
 202
 203         retval = TIME_ZONE_ID_STANDARD;
 204         if( pTZinfo->DaylightDate.wMonth <  pTZinfo->StandardDate.wMonth ) {
 205             /* Northern hemisphere */
 206             if( beforeStandardDate && afterDaylightDate )
 207                 retval = TIME_ZONE_ID_DAYLIGHT;
 208         } else    /* Down south */
 209             if( beforeStandardDate || afterDaylightDate )
 210             retval = TIME_ZONE_ID_DAYLIGHT;
 211     } else
 212         /* No transition date */
 213         retval = TIME_ZONE_ID_UNKNOWN;
 214
 215     return retval;
 216 }
 217
 218 /***********************************************************************
 219  *  TIME_TimeZoneID
 220  *
 221  *  Calculates whether daylight saving is on now.
 222  *
 223  *  PARAMS
 224  *      pTzi [in] Timezone info.
 225  *
 226  *  RETURNS
 227  *      TIME_ZONE_ID_INVALID    An error occurred
 228  *      TIME_ZONE_ID_UNKNOWN    There are no transition time known
 229  *      TIME_ZONE_ID_STANDARD   Current time is standard time
 230  *      TIME_ZONE_ID_DAYLIGHT   Current time is dayligh saving time
 231  */
 232 static DWORD TIME_ZoneID( const TIME_ZONE_INFORMATION *pTzi )
 233 {
 234     FILETIME ftTime;
 235     GetSystemTimeAsFileTime( &ftTime);
 236     return TIME_CompTimeZoneID( pTzi, &ftTime, FALSE);
 237 }
 238
 239 /***********************************************************************
 240  *  TIME_GetTimezoneBias
 241  *
 242  *  Calculates the local time bias for a given time zone.
 243  *
 244  * PARAMS
 245  *  pTZinfo    [in]  The time zone data.
 246  *  lpFileTime [in]  The system or local time.
 247  *  islocal    [in]  It is local time.
 248  *  pBias      [out] The calculated bias in minutes.
 249  *
 250  * RETURNS
 251  *  TRUE when the time zone bias was calculated.
 252  */
 253 static BOOL TIME_GetTimezoneBias( const TIME_ZONE_INFORMATION *pTZinfo,
 254     FILETIME *lpFileTime, BOOL islocal, LONG *pBias )
 255 {
 256     LONG bias = pTZinfo->Bias;
 257     DWORD tzid = TIME_CompTimeZoneID( pTZinfo, lpFileTime, islocal);
 258
 259     if( tzid == TIME_ZONE_ID_INVALID)
 260         return FALSE;
 261     if (tzid == TIME_ZONE_ID_DAYLIGHT)
 262         bias += pTZinfo->DaylightBias;
 263     else if (tzid == TIME_ZONE_ID_STANDARD)
 264         bias += pTZinfo->StandardBias;
 265     *pBias = bias;
 266     return TRUE;
 267 }
 268
 269
 270 /***********************************************************************
 271  *              SetLocalTime            (KERNEL32.@)
 272  *
 273  *  Set the local time using current time zone and daylight
 274  *  savings settings.
 275  *
 276  * PARAMS
 277  *  systime [in] The desired local time.
 278  *
 279  * RETURNS
 280  *  Success: TRUE. The time was set.
 281  *  Failure: FALSE, if the time was invalid or caller does not have
 282  *           permission to change the time.
 283  */
 284 BOOL WINAPI SetLocalTime( const SYSTEMTIME *systime )
 285 {
 286     FILETIME ft;
 287     LARGE_INTEGER st, st2;
 288     NTSTATUS status;
 289
 290     if( !SystemTimeToFileTime( systime, &ft ))
 291         return FALSE;
 292     st.u.LowPart = ft.dwLowDateTime;
 293     st.u.HighPart = ft.dwHighDateTime;
 294     RtlLocalTimeToSystemTime( &st, &st2 );
 295
 296     if ((status = NtSetSystemTime(&st2, NULL)))
 297         SetLastError( RtlNtStatusToDosError(status) );
 298     return !status;
 299 }
 300
 301
 302 /***********************************************************************
 303  *           GetSystemTimeAdjustment     (KERNEL32.@)
 304  *
 305  *  Get the period between clock interrupts and the amount the clock
 306  *  is adjusted each interrupt so as to keep it in sync with an external source.
 307  *
 308  * PARAMS
 309  *  lpTimeAdjustment [out] The clock adjustment per interrupt in 100's of nanoseconds.
 310  *  lpTimeIncrement  [out] The time between clock interrupts in 100's of nanoseconds.
 311  *  lpTimeAdjustmentDisabled [out] The clock synchronisation has been disabled.
 312  *
 313  * RETURNS
 314  *  TRUE.
 315  *
 316  * BUGS
 317  *  Only the special case of disabled time adjustments is supported.
 318  */
 319 BOOL WINAPI GetSystemTimeAdjustment( PDWORD lpTimeAdjustment, PDWORD lpTimeIncrement,
 320     PBOOL  lpTimeAdjustmentDisabled )
 321 {
 322     *lpTimeAdjustment = 0;
 323     *lpTimeIncrement = 0;
 324     *lpTimeAdjustmentDisabled = TRUE;
 325     return TRUE;
 326 }
 327
 328
 329 /***********************************************************************
 330  *              SetSystemTime            (KERNEL32.@)
 331  *
 332  *  Set the system time in utc.
 333  *
 334  * PARAMS
 335  *  systime [in] The desired system time.
 336  *
 337  * RETURNS
 338  *  Success: TRUE. The time was set.
 339  *  Failure: FALSE, if the time was invalid or caller does not have
 340  *           permission to change the time.
 341  */
 342 BOOL WINAPI SetSystemTime( const SYSTEMTIME *systime )
 343 {
 344     FILETIME ft;
 345     LARGE_INTEGER t;
 346     NTSTATUS status;
 347
 348     if( !SystemTimeToFileTime( systime, &ft ))
 349         return FALSE;
 350     t.u.LowPart = ft.dwLowDateTime;
 351     t.u.HighPart = ft.dwHighDateTime;
 352     if ((status = NtSetSystemTime(&t, NULL)))
 353         SetLastError( RtlNtStatusToDosError(status) );
 354     return !status;
 355 }
 356
 357 /***********************************************************************
 358  *              SetSystemTimeAdjustment  (KERNEL32.@)
 359  *
 360  *  Enables or disables the timing adjustments to the system's clock.
 361  *
 362  * PARAMS
 363  *  dwTimeAdjustment        [in] Number of units to add per clock interrupt.
 364  *  bTimeAdjustmentDisabled [in] Adjustment mode.
 365  *
 366  * RETURNS
 367  *  Success: TRUE.
 368  *  Failure: FALSE.
 369  */
 370 BOOL WINAPI SetSystemTimeAdjustment( DWORD dwTimeAdjustment, BOOL bTimeAdjustmentDisabled )
 371 {
 372     /* Fake function for now... */
 373     FIXME("(%08x,%d): stub !\n", dwTimeAdjustment, bTimeAdjustmentDisabled);
 374     return TRUE;
 375 }
 376
 377 /***********************************************************************
 378  *              GetTimeZoneInformation  (KERNEL32.@)
 379  *
 380  *  Get information about the current local time zone.
 381  *
 382  * PARAMS
 383  *  tzinfo [out] Destination for time zone information.
 384  *
 385  * RETURNS
 386  *  TIME_ZONE_ID_INVALID    An error occurred
 387  *  TIME_ZONE_ID_UNKNOWN    There are no transition time known
 388  *  TIME_ZONE_ID_STANDARD   Current time is standard time
 389  *  TIME_ZONE_ID_DAYLIGHT   Current time is dayligh saving time
 390  */
 391 DWORD WINAPI GetTimeZoneInformation( LPTIME_ZONE_INFORMATION tzinfo )
 392 {
 393     NTSTATUS status;
 394
 395     status = RtlQueryTimeZoneInformation( (RTL_TIME_ZONE_INFORMATION*)tzinfo );
 396     if ( status != STATUS_SUCCESS )
 397     {
 398         SetLastError( RtlNtStatusToDosError(status) );
 399         return TIME_ZONE_ID_INVALID;
 400     }
 401     return TIME_ZoneID( tzinfo );
 402 }
 403
 404 /***********************************************************************
 405  *              SetTimeZoneInformation  (KERNEL32.@)
 406  *
 407  *  Change the settings of the current local time zone.
 408  *
 409  * PARAMS
 410  *  tzinfo [in] The new time zone.
 411  *
 412  * RETURNS
 413  *  Success: TRUE. The time zone was updated with the settings from tzinfo.
 414  *  Failure: FALSE.
 415  */
 416 BOOL WINAPI SetTimeZoneInformation( const TIME_ZONE_INFORMATION *tzinfo )
 417 {
 418     NTSTATUS status;
 419     status = RtlSetTimeZoneInformation( (const RTL_TIME_ZONE_INFORMATION *)tzinfo );
 420     if ( status != STATUS_SUCCESS )
 421         SetLastError( RtlNtStatusToDosError(status) );
 422     return !status;
 423 }
 424
 425 /***********************************************************************
 426  *              SystemTimeToTzSpecificLocalTime  (KERNEL32.@)
 427  *
 428  *  Convert a utc system time to a local time in a given time zone.
 429  *
 430  * PARAMS
 431  *  lpTimeZoneInformation [in]  The desired time zone.
 432  *  lpUniversalTime       [in]  The utc time to base local time on.
 433  *  lpLocalTime           [out] The local time in the time zone.
 434  *
 435  * RETURNS
 436  *  Success: TRUE. lpLocalTime contains the converted time
 437  *  Failure: FALSE.
 438  */
 439
 440 BOOL WINAPI SystemTimeToTzSpecificLocalTime(
 441     LPTIME_ZONE_INFORMATION lpTimeZoneInformation,
 442     LPSYSTEMTIME lpUniversalTime, LPSYSTEMTIME lpLocalTime )
 443 {
 444     FILETIME ft;
 445     LONG lBias;
 446     LONGLONG llTime;
 447     TIME_ZONE_INFORMATION tzinfo;
 448
 449     if (lpTimeZoneInformation != NULL)
 450     {
 451         memcpy(&tzinfo, lpTimeZoneInformation, sizeof(TIME_ZONE_INFORMATION));
 452     }
 453     else
 454     {
 455         if (GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_INVALID)
 456             return FALSE;
 457     }
 458
 459     if (!SystemTimeToFileTime(lpUniversalTime, &ft))
 460         return FALSE;
 461     FILETIME2LL( &ft, llTime)
 462     if (!TIME_GetTimezoneBias(&tzinfo, &ft, FALSE, &lBias))
 463         return FALSE;
 464     /* convert minutes to 100-nanoseconds-ticks */
 465     llTime -= (LONGLONG)lBias * 600000000;
 466     LL2FILETIME( llTime, &ft)
 467
 468     return FileTimeToSystemTime(&ft, lpLocalTime);
 469 }
 470
 471
 472 /***********************************************************************
 473  *              TzSpecificLocalTimeToSystemTime  (KERNEL32.@)
 474  *
 475  *  Converts a local time to a time in utc.
 476  *
 477  * PARAMS
 478  *  lpTimeZoneInformation [in]  The desired time zone.
 479  *  lpLocalTime           [in]  The local time.
 480  *  lpUniversalTime       [out] The calculated utc time.
 481  *
 482  * RETURNS
 483  *  Success: TRUE. lpUniversalTime contains the converted time.
 484  *  Failure: FALSE.
 485  */
 486 BOOL WINAPI TzSpecificLocalTimeToSystemTime(
 487     LPTIME_ZONE_INFORMATION lpTimeZoneInformation,
 488     LPSYSTEMTIME lpLocalTime, LPSYSTEMTIME lpUniversalTime)
 489 {
 490     FILETIME ft;
 491     LONG lBias;
 492     LONGLONG t;
 493     TIME_ZONE_INFORMATION tzinfo;
 494
 495     if (lpTimeZoneInformation != NULL)
 496     {
 497         memcpy(&tzinfo, lpTimeZoneInformation, sizeof(TIME_ZONE_INFORMATION));
 498     }
 499     else
 500     {
 501         if (GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_INVALID)
 502             return FALSE;
 503     }
 504
 505     if (!SystemTimeToFileTime(lpLocalTime, &ft))
 506         return FALSE;
 507     FILETIME2LL( &ft, t)
 508     if (!TIME_GetTimezoneBias(&tzinfo, &ft, TRUE, &lBias))
 509         return FALSE;
 510     /* convert minutes to 100-nanoseconds-ticks */
 511     t += (LONGLONG)lBias * 600000000;
 512     LL2FILETIME( t, &ft)
 513     return FileTimeToSystemTime(&ft, lpUniversalTime);
 514 }
 515
 516
 517 /***********************************************************************
 518  *              GetSystemTimeAsFileTime  (KERNEL32.@)
 519  *
 520  *  Get the current time in utc format.
 521  *
 522  *  RETURNS
 523  *   Nothing.
 524  */
 525 VOID WINAPI GetSystemTimeAsFileTime(
 526     LPFILETIME time) /* [out] Destination for the current utc time */
 527 {
 528     LARGE_INTEGER t;
 529     NtQuerySystemTime( &t );
 530     time->dwLowDateTime = t.u.LowPart;
 531     time->dwHighDateTime = t.u.HighPart;
 532 }
 533
 534
 535 /*********************************************************************
 536  *      TIME_ClockTimeToFileTime    (olorin@fandra.org, 20-Sep-1998)
 537  *
 538  *  Used by GetProcessTimes to convert clock_t into FILETIME.
 539  *
 540  *      Differences to UnixTimeToFileTime:
 541  *          1) Divided by CLK_TCK
 542  *          2) Time is relative. There is no 'starting date', so there is
 543  *             no need for offset correction, like in UnixTimeToFileTime
 544  */
 545 #ifndef CLK_TCK
 546 # define CLK_TCK CLOCKS_PER_SEC
 547 #endif
 548 static void TIME_ClockTimeToFileTime(clock_t unix_time, LPFILETIME filetime)
 549 {
 550     ULONGLONG secs = RtlEnlargedUnsignedMultiply( unix_time, 10000000 );
 551     secs = RtlExtendedLargeIntegerDivide( secs, CLK_TCK, NULL );
 552     filetime->dwLowDateTime  = (DWORD)secs;
 553     filetime->dwHighDateTime = (DWORD)(secs >> 32);
 554 }
 555
 556 /*********************************************************************
 557  *      GetProcessTimes                         (KERNEL32.@)
 558  *
 559  *  Get the user and kernel execution times of a process,
 560  *  along with the creation and exit times if known.
 561  *
 562  * PARAMS
 563  *  hprocess       [in]  The process to be queried.
 564  *  lpCreationTime [out] The creation time of the process.
 565  *  lpExitTime     [out] The exit time of the process if exited.
 566  *  lpKernelTime   [out] The time spent in kernel routines in 100's of nanoseconds.
 567  *  lpUserTime     [out] The time spent in user routines in 100's of nanoseconds.
 568  *
 569  * RETURNS
 570  *  TRUE.
 571  *
 572  * NOTES
 573  *  olorin@fandra.org:
 574  *  Would be nice to subtract the cpu time used by Wine at startup.
 575  *  Also, there is a need to separate times used by different applications.
 576  *
 577  * BUGS
 578  *  KernelTime and UserTime are always for the current process
 579  */
 580 BOOL WINAPI GetProcessTimes( HANDLE hprocess, LPFILETIME lpCreationTime,
 581     LPFILETIME lpExitTime, LPFILETIME lpKernelTime, LPFILETIME lpUserTime )
 582 {
 583     struct tms tms;
 584     KERNEL_USER_TIMES pti;
 585
 586     times(&tms);
 587     TIME_ClockTimeToFileTime(tms.tms_utime,lpUserTime);
 588     TIME_ClockTimeToFileTime(tms.tms_stime,lpKernelTime);
 589     if (NtQueryInformationProcess( hprocess, ProcessTimes, &pti, sizeof(pti), NULL))
 590         return FALSE;
 591     LL2FILETIME( pti.CreateTime.QuadPart, lpCreationTime);
 592     LL2FILETIME( pti.ExitTime.QuadPart, lpExitTime);
 593     return TRUE;
 594 }
 595
 596 /*********************************************************************
 597  *      GetCalendarInfoA                                (KERNEL32.@)
 598  *
 599  */
 600 int WINAPI GetCalendarInfoA(LCID lcid, CALID Calendar, CALTYPE CalType,
 601                             LPSTR lpCalData, int cchData, LPDWORD lpValue)
 602 {
 603     int ret;
 604     LPWSTR lpCalDataW = NULL;
 605
 606     lcid = ConvertDefaultLocale(lcid);
 607
 608     if (NLS_IsUnicodeOnlyLcid(lcid))
 609     {
 610       SetLastError(ERROR_INVALID_PARAMETER);
 611       return 0;
 612     }
 613
 614     if (cchData &&
 615         !(lpCalDataW = HeapAlloc(GetProcessHeap(), 0, cchData*sizeof(WCHAR))))
 616       return 0;
 617
 618     ret = GetCalendarInfoW(lcid, Calendar, CalType, lpCalDataW, cchData, lpValue);
 619     if(ret && lpCalDataW && lpCalData)
 620       WideCharToMultiByte(CP_ACP, 0, lpCalDataW, cchData, lpCalData, cchData, NULL, NULL);
 621     HeapFree(GetProcessHeap(), 0, lpCalDataW);
 622
 623     return ret;
 624 }
 625
 626 /*********************************************************************
 627  *      GetCalendarInfoW                                (KERNEL32.@)
 628  *
 629  */
 630 int WINAPI GetCalendarInfoW(LCID Locale, CALID Calendar, CALTYPE CalType,
 631                             LPWSTR lpCalData, int cchData, LPDWORD lpValue)
 632 {
 633     if (CalType & CAL_NOUSEROVERRIDE)
 634         FIXME("flag CAL_NOUSEROVERRIDE used, not fully implemented\n");
 635     if (CalType & CAL_USE_CP_ACP)
 636         FIXME("flag CAL_USE_CP_ACP used, not fully implemented\n");
 637
 638     if (CalType & CAL_RETURN_NUMBER) {
 639         if (lpCalData != NULL)
 640             WARN("lpCalData not NULL (%p) when it should!\n", lpCalData);
 641         if (cchData != 0)
 642             WARN("cchData not 0 (%d) when it should!\n", cchData);
 643     } else {
 644         if (lpValue != NULL)
 645             WARN("lpValue not NULL (%p) when it should!\n", lpValue);
 646     }
 647
 648     /* FIXME: No verification is made yet wrt Locale
 649      * for the CALTYPES not requiring GetLocaleInfoA */
 650     switch (CalType & ~(CAL_NOUSEROVERRIDE|CAL_RETURN_NUMBER|CAL_USE_CP_ACP)) {
 651         case CAL_ICALINTVALUE:
 652             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 653             return E_FAIL;
 654         case CAL_SCALNAME:
 655             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 656             return E_FAIL;
 657         case CAL_IYEAROFFSETRANGE:
 658             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 659             return E_FAIL;
 660         case CAL_SERASTRING:
 661             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 662             return E_FAIL;
 663         case CAL_SSHORTDATE:
 664             return GetLocaleInfoW(Locale, LOCALE_SSHORTDATE, lpCalData, cchData);
 665         case CAL_SLONGDATE:
 666             return GetLocaleInfoW(Locale, LOCALE_SLONGDATE, lpCalData, cchData);
 667         case CAL_SDAYNAME1:
 668             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME1, lpCalData, cchData);
 669         case CAL_SDAYNAME2:
 670             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME2, lpCalData, cchData);
 671         case CAL_SDAYNAME3:
 672             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME3, lpCalData, cchData);
 673         case CAL_SDAYNAME4:
 674             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME4, lpCalData, cchData);
 675         case CAL_SDAYNAME5:
 676             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME5, lpCalData, cchData);
 677         case CAL_SDAYNAME6:
 678             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME6, lpCalData, cchData);
 679         case CAL_SDAYNAME7:
 680             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME7, lpCalData, cchData);
 681         case CAL_SABBREVDAYNAME1:
 682             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME1, lpCalData, cchData);
 683         case CAL_SABBREVDAYNAME2:
 684             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME2, lpCalData, cchData);
 685         case CAL_SABBREVDAYNAME3:
 686             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME3, lpCalData, cchData);
 687         case CAL_SABBREVDAYNAME4:
 688             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME4, lpCalData, cchData);
 689         case CAL_SABBREVDAYNAME5:
 690             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME5, lpCalData, cchData);
 691         case CAL_SABBREVDAYNAME6:
 692             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME6, lpCalData, cchData);
 693         case CAL_SABBREVDAYNAME7:
 694             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME7, lpCalData, cchData);
 695         case CAL_SMONTHNAME1:
 696             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME1, lpCalData, cchData);
 697         case CAL_SMONTHNAME2:
 698             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME2, lpCalData, cchData);
 699         case CAL_SMONTHNAME3:
 700             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME3, lpCalData, cchData);
 701         case CAL_SMONTHNAME4:
 702             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME4, lpCalData, cchData);
 703         case CAL_SMONTHNAME5:
 704             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME5, lpCalData, cchData);
 705         case CAL_SMONTHNAME6:
 706             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME6, lpCalData, cchData);
 707         case CAL_SMONTHNAME7:
 708             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME7, lpCalData, cchData);
 709         case CAL_SMONTHNAME8:
 710             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME8, lpCalData, cchData);
 711         case CAL_SMONTHNAME9:
 712             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME9, lpCalData, cchData);
 713         case CAL_SMONTHNAME10:
 714             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME10, lpCalData, cchData);
 715         case CAL_SMONTHNAME11:
 716             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME11, lpCalData, cchData);
 717         case CAL_SMONTHNAME12:
 718             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME12, lpCalData, cchData);
 719         case CAL_SMONTHNAME13:
 720             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME13, lpCalData, cchData);
 721         case CAL_SABBREVMONTHNAME1:
 722             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME1, lpCalData, cchData);
 723         case CAL_SABBREVMONTHNAME2:
 724             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME2, lpCalData, cchData);
 725         case CAL_SABBREVMONTHNAME3:
 726             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME3, lpCalData, cchData);
 727         case CAL_SABBREVMONTHNAME4:
 728             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME4, lpCalData, cchData);
 729         case CAL_SABBREVMONTHNAME5:
 730             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME5, lpCalData, cchData);
 731         case CAL_SABBREVMONTHNAME6:
 732             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME6, lpCalData, cchData);
 733         case CAL_SABBREVMONTHNAME7:
 734             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME7, lpCalData, cchData);
 735         case CAL_SABBREVMONTHNAME8:
 736             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME8, lpCalData, cchData);
 737         case CAL_SABBREVMONTHNAME9:
 738             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME9, lpCalData, cchData);
 739         case CAL_SABBREVMONTHNAME10:
 740             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME10, lpCalData, cchData);
 741         case CAL_SABBREVMONTHNAME11:
 742             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME11, lpCalData, cchData);
 743         case CAL_SABBREVMONTHNAME12:
 744             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME12, lpCalData, cchData);
 745         case CAL_SABBREVMONTHNAME13:
 746             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME13, lpCalData, cchData);
 747         case CAL_SYEARMONTH:
 748             return GetLocaleInfoW(Locale, LOCALE_SYEARMONTH, lpCalData, cchData);
 749         case CAL_ITWODIGITYEARMAX:
 750             if (lpValue) *lpValue = CALINFO_MAX_YEAR;
 751             break;
 752         default: MESSAGE("Unknown caltype %d\n",CalType & 0xffff);
 753                  return E_FAIL;
 754     }
 755     return 0;
 756 }
 757
 758 /*********************************************************************
 759  *      SetCalendarInfoA                                (KERNEL32.@)
 760  *
 761  */
 762 int WINAPI      SetCalendarInfoA(LCID Locale, CALID Calendar, CALTYPE CalType, LPCSTR lpCalData)
 763 {
 764     FIXME("(%08x,%08x,%08x,%s): stub\n",
 765           Locale, Calendar, CalType, debugstr_a(lpCalData));
 766     return 0;
 767 }
 768
 769 /*********************************************************************
 770  *      SetCalendarInfoW                                (KERNEL32.@)
 771  *
 772  *
 773  */
 774 int WINAPI      SetCalendarInfoW(LCID Locale, CALID Calendar, CALTYPE CalType, LPCWSTR lpCalData)
 775 {
 776     FIXME("(%08x,%08x,%08x,%s): stub\n",
 777           Locale, Calendar, CalType, debugstr_w(lpCalData));
 778     return 0;
 779 }
 780
 781 /*********************************************************************
 782  *      LocalFileTimeToFileTime                         (KERNEL32.@)
 783  */
 784 BOOL WINAPI LocalFileTimeToFileTime( const FILETIME *localft, LPFILETIME utcft )
 785 {
 786     NTSTATUS status;
 787     LARGE_INTEGER local, utc;
 788
 789     local.u.LowPart = localft->dwLowDateTime;
 790     local.u.HighPart = localft->dwHighDateTime;
 791     if (!(status = RtlLocalTimeToSystemTime( &local, &utc )))
 792     {
 793         utcft->dwLowDateTime = utc.u.LowPart;
 794         utcft->dwHighDateTime = utc.u.HighPart;
 795     }
 796     else SetLastError( RtlNtStatusToDosError(status) );
 797
 798     return !status;
 799 }
 800
 801 /*********************************************************************
 802  *      FileTimeToLocalFileTime                         (KERNEL32.@)
 803  */
 804 BOOL WINAPI FileTimeToLocalFileTime( const FILETIME *utcft, LPFILETIME localft )
 805 {
 806     NTSTATUS status;
 807     LARGE_INTEGER local, utc;
 808
 809     utc.u.LowPart = utcft->dwLowDateTime;
 810     utc.u.HighPart = utcft->dwHighDateTime;
 811     if (!(status = RtlSystemTimeToLocalTime( &utc, &local )))
 812     {
 813         localft->dwLowDateTime = local.u.LowPart;
 814         localft->dwHighDateTime = local.u.HighPart;
 815     }
 816     else SetLastError( RtlNtStatusToDosError(status) );
 817
 818     return !status;
 819 }
 820
 821 /*********************************************************************
 822  *      FileTimeToSystemTime                            (KERNEL32.@)
 823  */
 824 BOOL WINAPI FileTimeToSystemTime( const FILETIME *ft, LPSYSTEMTIME syst )
 825 {
 826     TIME_FIELDS tf;
 827     LARGE_INTEGER t;
 828
 829     t.u.LowPart = ft->dwLowDateTime;
 830     t.u.HighPart = ft->dwHighDateTime;
 831     RtlTimeToTimeFields(&t, &tf);
 832
 833     syst->wYear = tf.Year;
 834     syst->wMonth = tf.Month;
 835     syst->wDay = tf.Day;
 836     syst->wHour = tf.Hour;
 837     syst->wMinute = tf.Minute;
 838     syst->wSecond = tf.Second;
 839     syst->wMilliseconds = tf.Milliseconds;
 840     syst->wDayOfWeek = tf.Weekday;
 841     return TRUE;
 842 }
 843
 844 /*********************************************************************
 845  *      SystemTimeToFileTime                            (KERNEL32.@)
 846  */
 847 BOOL WINAPI SystemTimeToFileTime( const SYSTEMTIME *syst, LPFILETIME ft )
 848 {
 849     TIME_FIELDS tf;
 850     LARGE_INTEGER t;
 851
 852     tf.Year = syst->wYear;
 853     tf.Month = syst->wMonth;
 854     tf.Day = syst->wDay;
 855     tf.Hour = syst->wHour;
 856     tf.Minute = syst->wMinute;
 857     tf.Second = syst->wSecond;
 858     tf.Milliseconds = syst->wMilliseconds;
 859
 860     if( !RtlTimeFieldsToTime(&tf, &t)) {
 861         SetLastError( ERROR_INVALID_PARAMETER);
 862         return FALSE;
 863     }
 864     ft->dwLowDateTime = t.u.LowPart;
 865     ft->dwHighDateTime = t.u.HighPart;
 866     return TRUE;
 867 }
 868
 869 /*********************************************************************
 870  *      CompareFileTime                                 (KERNEL32.@)
 871  *
 872  * Compare two FILETIME's to each other.
 873  *
 874  * PARAMS
 875  *  x [I] First time
 876  *  y [I] time to compare to x
 877  *
 878  * RETURNS
 879  *  -1, 0, or 1 indicating that x is less than, equal to, or greater
 880  *  than y respectively.
 881  */
 882 INT WINAPI CompareFileTime( const FILETIME *x, const FILETIME *y )
 883 {
 884     if (!x || !y) return -1;
 885
 886     if (x->dwHighDateTime > y->dwHighDateTime)
 887         return 1;
 888     if (x->dwHighDateTime < y->dwHighDateTime)
 889         return -1;
 890     if (x->dwLowDateTime > y->dwLowDateTime)
 891         return 1;
 892     if (x->dwLowDateTime < y->dwLowDateTime)
 893         return -1;
 894     return 0;
 895 }
 896
 897 /*********************************************************************
 898  *      GetLocalTime                                    (KERNEL32.@)
 899  *
 900  * Get the current local time.
 901  *
 902  * PARAMS
 903  *  systime [O] Destination for current time.
 904  *
 905  * RETURNS
 906  *  Nothing.
 907  */
 908 VOID WINAPI GetLocalTime(LPSYSTEMTIME systime)
 909 {
 910     FILETIME lft;
 911     LARGE_INTEGER ft, ft2;
 912
 913     NtQuerySystemTime(&ft);
 914     RtlSystemTimeToLocalTime(&ft, &ft2);
 915     lft.dwLowDateTime = ft2.u.LowPart;
 916     lft.dwHighDateTime = ft2.u.HighPart;
 917     FileTimeToSystemTime(&lft, systime);
 918 }
 919
 920 /*********************************************************************
 921  *      GetSystemTime                                   (KERNEL32.@)
 922  *
 923  * Get the current system time.
 924  *
 925  * PARAMS
 926  *  systime [O] Destination for current time.
 927  *
 928  * RETURNS
 929  *  Nothing.
 930  */
 931 VOID WINAPI GetSystemTime(LPSYSTEMTIME systime)
 932 {
 933     FILETIME ft;
 934     LARGE_INTEGER t;
 935
 936     NtQuerySystemTime(&t);
 937     ft.dwLowDateTime = t.u.LowPart;
 938     ft.dwHighDateTime = t.u.HighPart;
 939     FileTimeToSystemTime(&ft, systime);
 940 }
 941
 942 /*********************************************************************
 943  *      GetDaylightFlag                                   (KERNEL32.@)
 944  *
 945  *  Specifies if daylight saving time is in operation.
 946  *
 947  * NOTES
 948  *  This function is called from the Win98's control applet timedate.cpl.
 949  *
 950  * RETURNS
 951  *  TRUE if daylight saving time is in operation.
 952  *  FALSE otherwise.
 953  */
 954 BOOL WINAPI GetDaylightFlag(void)
 955 {
 956     TIME_ZONE_INFORMATION tzinfo;
 957     return GetTimeZoneInformation( &tzinfo) == TIME_ZONE_ID_DAYLIGHT;
 958 }
 959
 960 /***********************************************************************
 961  *           DosDateTimeToFileTime   (KERNEL32.@)
 962  */
 963 BOOL WINAPI DosDateTimeToFileTime( WORD fatdate, WORD fattime, LPFILETIME ft)
 964 {
 965     struct tm newtm;
 966 #ifndef HAVE_TIMEGM
 967     struct tm *gtm;
 968     time_t time1, time2;
 969 #endif
 970
 971     newtm.tm_sec  = (fattime & 0x1f) * 2;
 972     newtm.tm_min  = (fattime >> 5) & 0x3f;
 973     newtm.tm_hour = (fattime >> 11);
 974     newtm.tm_mday = (fatdate & 0x1f);
 975     newtm.tm_mon  = ((fatdate >> 5) & 0x0f) - 1;
 976     newtm.tm_year = (fatdate >> 9) + 80;
 977 #ifdef HAVE_TIMEGM
 978     RtlSecondsSince1970ToTime( timegm(&newtm), (LARGE_INTEGER *)ft );
 979 #else
 980     time1 = mktime(&newtm);
 981     gtm = gmtime(&time1);
 982     time2 = mktime(gtm);
 983     RtlSecondsSince1970ToTime( 2*time1-time2, (LARGE_INTEGER *)ft );
 984 #endif
 985     return TRUE;
 986 }
 987
 988
 989 /***********************************************************************
 990  *           FileTimeToDosDateTime   (KERNEL32.@)
 991  */
 992 BOOL WINAPI FileTimeToDosDateTime( const FILETIME *ft, LPWORD fatdate,
 993                                      LPWORD fattime )
 994 {
 995     LARGE_INTEGER       li;
 996     ULONG               t;
 997     time_t              unixtime;
 998     struct tm*          tm;
 999
1000     li.u.LowPart = ft->dwLowDateTime;
1001     li.u.HighPart = ft->dwHighDateTime;
1002     RtlTimeToSecondsSince1970( &li, &t );
1003     unixtime = t;
1004     tm = gmtime( &unixtime );
1005     if (fattime)
1006         *fattime = (tm->tm_hour << 11) + (tm->tm_min << 5) + (tm->tm_sec / 2);
1007     if (fatdate)
1008         *fatdate = ((tm->tm_year - 80) << 9) + ((tm->tm_mon + 1) << 5)
1009                    + tm->tm_mday;
1010     return TRUE;
1011 }