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 #define CALINFO_MAX_YEAR 2029
  56
  57 #define LL2FILETIME( ll, pft )\
  58     (pft)->dwLowDateTime = (UINT)(ll); \
  59     (pft)->dwHighDateTime = (UINT)((ll) >> 32);
  60 #define FILETIME2LL( pft, ll) \
  61     ll = (((LONGLONG)((pft)->dwHighDateTime))<<32) + (pft)-> dwLowDateTime ;
  62
  63
  64 static const int MonthLengths[2][12] =
  65 {
  66         { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
  67         { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
  68 };
  69
  70 static inline int IsLeapYear(int Year)
  71 {
  72         return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 1 : 0;
  73 }
  74
  75 /***********************************************************************
  76  *  TIME_DayLightCompareDate
  77  *
  78  * Compares two dates without looking at the year.
  79  *
  80  * PARAMS
  81  *   date        [in] The local time to compare.
  82  *   compareDate [in] The daylight savings begin or end date.
  83  *
  84  * RETURNS
  85  *
  86  *  -1 if date < compareDate
  87  *   0 if date == compareDate
  88  *   1 if date > compareDate
  89  *  -2 if an error occurs
  90  */
  91 static int TIME_DayLightCompareDate( const SYSTEMTIME *date,
  92     const SYSTEMTIME *compareDate )
  93 {
  94     int limit_day, dayinsecs;
  95
  96     if (date->wMonth < compareDate->wMonth)
  97         return -1; /* We are in a month before the date limit. */
  98
  99     if (date->wMonth > compareDate->wMonth)
 100         return 1; /* We are in a month after the date limit. */
 101
 102     /* if year is 0 then date is in day-of-week format, otherwise
 103      * it's absolute date.
 104      */
 105     if (compareDate->wYear == 0)
 106     {
 107         WORD First;
 108         /* compareDate->wDay is interpreted as number of the week in the month
 109          * 5 means: the last week in the month */
 110         int weekofmonth = compareDate->wDay;
 111           /* calculate the day of the first DayOfWeek in the month */
 112         First = ( 6 + compareDate->wDayOfWeek - date->wDayOfWeek + date->wDay
 113                ) % 7 + 1;
 114         limit_day = First + 7 * (weekofmonth - 1);
 115         /* check needed for the 5th weekday of the month */
 116         if(limit_day > MonthLengths[date->wMonth==2 && IsLeapYear(date->wYear)]
 117                 [date->wMonth - 1])
 118             limit_day -= 7;
 119     }
 120     else
 121     {
 122        limit_day = compareDate->wDay;
 123     }
 124
 125     /* convert to seconds */
 126     limit_day = ((limit_day * 24  + compareDate->wHour) * 60 +
 127             compareDate->wMinute ) * 60;
 128     dayinsecs = ((date->wDay * 24  + date->wHour) * 60 +
 129             date->wMinute ) * 60 + date->wSecond;
 130     /* and compare */
 131     return dayinsecs < limit_day ? -1 :
 132            dayinsecs > limit_day ? 1 :
 133            0;   /* date is equal to the date limit. */
 134 }
 135
 136 /***********************************************************************
 137  *  TIME_CompTimeZoneID
 138  *
 139  *  Computes the local time bias for a given time and time zone.
 140  *
 141  *  PARAMS
 142  *      pTZinfo     [in] The time zone data.
 143  *      lpFileTime  [in] The system or local time.
 144  *      islocal     [in] it is local time.
 145  *
 146  *  RETURNS
 147  *      TIME_ZONE_ID_INVALID    An error occurred
 148  *      TIME_ZONE_ID_UNKNOWN    There are no transition time known
 149  *      TIME_ZONE_ID_STANDARD   Current time is standard time
 150  *      TIME_ZONE_ID_DAYLIGHT   Current time is daylight savings time
 151  */
 152 static DWORD TIME_CompTimeZoneID ( const TIME_ZONE_INFORMATION *pTZinfo,
 153     FILETIME *lpFileTime, BOOL islocal )
 154 {
 155     int ret;
 156     BOOL beforeStandardDate, afterDaylightDate;
 157     DWORD retval = TIME_ZONE_ID_INVALID;
 158     LONGLONG llTime = 0; /* initialized to prevent gcc complaining */
 159     SYSTEMTIME SysTime;
 160     FILETIME ftTemp;
 161
 162     if (pTZinfo->DaylightDate.wMonth != 0)
 163     {
 164         /* if year is 0 then date is in day-of-week format, otherwise
 165          * it's absolute date.
 166          */
 167         if (pTZinfo->StandardDate.wMonth == 0 ||
 168             (pTZinfo->StandardDate.wYear == 0 &&
 169             (pTZinfo->StandardDate.wDay<1 ||
 170             pTZinfo->StandardDate.wDay>5 ||
 171             pTZinfo->DaylightDate.wDay<1 ||
 172             pTZinfo->DaylightDate.wDay>5)))
 173         {
 174             SetLastError(ERROR_INVALID_PARAMETER);
 175             return TIME_ZONE_ID_INVALID;
 176         }
 177
 178         if (!islocal) {
 179             FILETIME2LL( lpFileTime, llTime );
 180             llTime -= ( pTZinfo->Bias + pTZinfo->DaylightBias )
 181                 * (LONGLONG)600000000;
 182             LL2FILETIME( llTime, &ftTemp)
 183             lpFileTime = &ftTemp;
 184         }
 185
 186         FileTimeToSystemTime(lpFileTime, &SysTime);
 187
 188          /* check for daylight savings */
 189         ret = TIME_DayLightCompareDate( &SysTime, &pTZinfo->StandardDate);
 190         if (ret == -2)
 191           return TIME_ZONE_ID_INVALID;
 192
 193         beforeStandardDate = ret < 0;
 194
 195         if (!islocal) {
 196             llTime -= ( pTZinfo->StandardBias - pTZinfo->DaylightBias )
 197                 * (LONGLONG)600000000;
 198             LL2FILETIME( llTime, &ftTemp)
 199             FileTimeToSystemTime(lpFileTime, &SysTime);
 200         }
 201
 202         ret = TIME_DayLightCompareDate( &SysTime, &pTZinfo->DaylightDate);
 203         if (ret == -2)
 204           return TIME_ZONE_ID_INVALID;
 205
 206         afterDaylightDate = ret >= 0;
 207
 208         retval = TIME_ZONE_ID_STANDARD;
 209         if( pTZinfo->DaylightDate.wMonth <  pTZinfo->StandardDate.wMonth ) {
 210             /* Northern hemisphere */
 211             if( beforeStandardDate && afterDaylightDate )
 212                 retval = TIME_ZONE_ID_DAYLIGHT;
 213         } else    /* Down south */
 214             if( beforeStandardDate || afterDaylightDate )
 215             retval = TIME_ZONE_ID_DAYLIGHT;
 216     } else
 217         /* No transition date */
 218         retval = TIME_ZONE_ID_UNKNOWN;
 219
 220     return retval;
 221 }
 222
 223 /***********************************************************************
 224  *  TIME_TimeZoneID
 225  *
 226  *  Calculates whether daylight savings is on now.
 227  *
 228  *  PARAMS
 229  *      pTzi [in] Timezone info.
 230  *
 231  *  RETURNS
 232  *      TIME_ZONE_ID_INVALID    An error occurred
 233  *      TIME_ZONE_ID_UNKNOWN    There are no transition time known
 234  *      TIME_ZONE_ID_STANDARD   Current time is standard time
 235  *      TIME_ZONE_ID_DAYLIGHT   Current time is daylight savings time
 236  */
 237 static DWORD TIME_ZoneID( const TIME_ZONE_INFORMATION *pTzi )
 238 {
 239     FILETIME ftTime;
 240     GetSystemTimeAsFileTime( &ftTime);
 241     return TIME_CompTimeZoneID( pTzi, &ftTime, FALSE);
 242 }
 243
 244 /***********************************************************************
 245  *  TIME_GetTimezoneBias
 246  *
 247  *  Calculates the local time bias for a given time zone.
 248  *
 249  * PARAMS
 250  *  pTZinfo    [in]  The time zone data.
 251  *  lpFileTime [in]  The system or local time.
 252  *  islocal    [in]  It is local time.
 253  *  pBias      [out] The calculated bias in minutes.
 254  *
 255  * RETURNS
 256  *  TRUE when the time zone bias was calculated.
 257  */
 258 static BOOL TIME_GetTimezoneBias( const TIME_ZONE_INFORMATION *pTZinfo,
 259     FILETIME *lpFileTime, BOOL islocal, LONG *pBias )
 260 {
 261     LONG bias = pTZinfo->Bias;
 262     DWORD tzid = TIME_CompTimeZoneID( pTZinfo, lpFileTime, islocal);
 263
 264     if( tzid == TIME_ZONE_ID_INVALID)
 265         return FALSE;
 266     if (tzid == TIME_ZONE_ID_DAYLIGHT)
 267         bias += pTZinfo->DaylightBias;
 268     else if (tzid == TIME_ZONE_ID_STANDARD)
 269         bias += pTZinfo->StandardBias;
 270     *pBias = bias;
 271     return TRUE;
 272 }
 273
 274
 275 /***********************************************************************
 276  *              SetLocalTime            (KERNEL32.@)
 277  *
 278  *  Set the local time using current time zone and daylight
 279  *  savings settings.
 280  *
 281  * PARAMS
 282  *  systime [in] The desired local time.
 283  *
 284  * RETURNS
 285  *  Success: TRUE. The time was set.
 286  *  Failure: FALSE, if the time was invalid or caller does not have
 287  *           permission to change the time.
 288  */
 289 BOOL WINAPI SetLocalTime( const SYSTEMTIME *systime )
 290 {
 291     FILETIME ft;
 292     LARGE_INTEGER st, st2;
 293     NTSTATUS status;
 294
 295     if( !SystemTimeToFileTime( systime, &ft ))
 296         return FALSE;
 297     st.u.LowPart = ft.dwLowDateTime;
 298     st.u.HighPart = ft.dwHighDateTime;
 299     RtlLocalTimeToSystemTime( &st, &st2 );
 300
 301     if ((status = NtSetSystemTime(&st2, NULL)))
 302         SetLastError( RtlNtStatusToDosError(status) );
 303     return !status;
 304 }
 305
 306
 307 /***********************************************************************
 308  *           GetSystemTimeAdjustment     (KERNEL32.@)
 309  *
 310  *  Get the period between clock interrupts and the amount the clock
 311  *  is adjusted each interrupt so as to keep it in sync with an external source.
 312  *
 313  * PARAMS
 314  *  lpTimeAdjustment [out] The clock adjustment per interrupt in 100's of nanoseconds.
 315  *  lpTimeIncrement  [out] The time between clock interrupts in 100's of nanoseconds.
 316  *  lpTimeAdjustmentDisabled [out] The clock synchronisation has been disabled.
 317  *
 318  * RETURNS
 319  *  TRUE.
 320  *
 321  * BUGS
 322  *  Only the special case of disabled time adjustments is supported.
 323  */
 324 BOOL WINAPI GetSystemTimeAdjustment( PDWORD lpTimeAdjustment, PDWORD lpTimeIncrement,
 325     PBOOL  lpTimeAdjustmentDisabled )
 326 {
 327     *lpTimeAdjustment = 0;
 328     *lpTimeIncrement = 0;
 329     *lpTimeAdjustmentDisabled = TRUE;
 330     return TRUE;
 331 }
 332
 333
 334 /***********************************************************************
 335  *              SetSystemTime            (KERNEL32.@)
 336  *
 337  *  Set the system time in utc.
 338  *
 339  * PARAMS
 340  *  systime [in] The desired system time.
 341  *
 342  * RETURNS
 343  *  Success: TRUE. The time was set.
 344  *  Failure: FALSE, if the time was invalid or caller does not have
 345  *           permission to change the time.
 346  */
 347 BOOL WINAPI SetSystemTime( const SYSTEMTIME *systime )
 348 {
 349     FILETIME ft;
 350     LARGE_INTEGER t;
 351     NTSTATUS status;
 352
 353     if( !SystemTimeToFileTime( systime, &ft ))
 354         return FALSE;
 355     t.u.LowPart = ft.dwLowDateTime;
 356     t.u.HighPart = ft.dwHighDateTime;
 357     if ((status = NtSetSystemTime(&t, NULL)))
 358         SetLastError( RtlNtStatusToDosError(status) );
 359     return !status;
 360 }
 361
 362 /***********************************************************************
 363  *              SetSystemTimeAdjustment  (KERNEL32.@)
 364  *
 365  *  Enables or disables the timing adjustments to the system's clock.
 366  *
 367  * PARAMS
 368  *  dwTimeAdjustment        [in] Number of units to add per clock interrupt.
 369  *  bTimeAdjustmentDisabled [in] Adjustment mode.
 370  *
 371  * RETURNS
 372  *  Success: TRUE.
 373  *  Failure: FALSE.
 374  */
 375 BOOL WINAPI SetSystemTimeAdjustment( DWORD dwTimeAdjustment, BOOL bTimeAdjustmentDisabled )
 376 {
 377     /* Fake function for now... */
 378     FIXME("(%08x,%d): stub !\n", dwTimeAdjustment, bTimeAdjustmentDisabled);
 379     return TRUE;
 380 }
 381
 382 /***********************************************************************
 383  *              GetTimeZoneInformation  (KERNEL32.@)
 384  *
 385  *  Get information about the current local time zone.
 386  *
 387  * PARAMS
 388  *  tzinfo [out] Destination for time zone information.
 389  *
 390  * RETURNS
 391  *  TIME_ZONE_ID_INVALID    An error occurred
 392  *  TIME_ZONE_ID_UNKNOWN    There are no transition time known
 393  *  TIME_ZONE_ID_STANDARD   Current time is standard time
 394  *  TIME_ZONE_ID_DAYLIGHT   Current time is daylight savings time
 395  */
 396 DWORD WINAPI GetTimeZoneInformation( LPTIME_ZONE_INFORMATION tzinfo )
 397 {
 398     NTSTATUS status;
 399
 400     status = RtlQueryTimeZoneInformation( (RTL_TIME_ZONE_INFORMATION*)tzinfo );
 401     if ( status != STATUS_SUCCESS )
 402     {
 403         SetLastError( RtlNtStatusToDosError(status) );
 404         return TIME_ZONE_ID_INVALID;
 405     }
 406     return TIME_ZoneID( tzinfo );
 407 }
 408
 409 /***********************************************************************
 410  *              SetTimeZoneInformation  (KERNEL32.@)
 411  *
 412  *  Change the settings of the current local time zone.
 413  *
 414  * PARAMS
 415  *  tzinfo [in] The new time zone.
 416  *
 417  * RETURNS
 418  *  Success: TRUE. The time zone was updated with the settings from tzinfo.
 419  *  Failure: FALSE.
 420  */
 421 BOOL WINAPI SetTimeZoneInformation( const TIME_ZONE_INFORMATION *tzinfo )
 422 {
 423     NTSTATUS status;
 424     status = RtlSetTimeZoneInformation( (const RTL_TIME_ZONE_INFORMATION *)tzinfo );
 425     if ( status != STATUS_SUCCESS )
 426         SetLastError( RtlNtStatusToDosError(status) );
 427     return !status;
 428 }
 429
 430 /***********************************************************************
 431  *              SystemTimeToTzSpecificLocalTime  (KERNEL32.@)
 432  *
 433  *  Convert a utc system time to a local time in a given time zone.
 434  *
 435  * PARAMS
 436  *  lpTimeZoneInformation [in]  The desired time zone.
 437  *  lpUniversalTime       [in]  The utc time to base local time on.
 438  *  lpLocalTime           [out] The local time in the time zone.
 439  *
 440  * RETURNS
 441  *  Success: TRUE. lpLocalTime contains the converted time
 442  *  Failure: FALSE.
 443  */
 444
 445 BOOL WINAPI SystemTimeToTzSpecificLocalTime(
 446     LPTIME_ZONE_INFORMATION lpTimeZoneInformation,
 447     LPSYSTEMTIME lpUniversalTime, LPSYSTEMTIME lpLocalTime )
 448 {
 449     FILETIME ft;
 450     LONG lBias;
 451     LONGLONG llTime;
 452     TIME_ZONE_INFORMATION tzinfo;
 453
 454     if (lpTimeZoneInformation != NULL)
 455     {
 456         tzinfo = *lpTimeZoneInformation;
 457     }
 458     else
 459     {
 460         if (GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_INVALID)
 461             return FALSE;
 462     }
 463
 464     if (!SystemTimeToFileTime(lpUniversalTime, &ft))
 465         return FALSE;
 466     FILETIME2LL( &ft, llTime)
 467     if (!TIME_GetTimezoneBias(&tzinfo, &ft, FALSE, &lBias))
 468         return FALSE;
 469     /* convert minutes to 100-nanoseconds-ticks */
 470     llTime -= (LONGLONG)lBias * 600000000;
 471     LL2FILETIME( llTime, &ft)
 472
 473     return FileTimeToSystemTime(&ft, lpLocalTime);
 474 }
 475
 476
 477 /***********************************************************************
 478  *              TzSpecificLocalTimeToSystemTime  (KERNEL32.@)
 479  *
 480  *  Converts a local time to a time in utc.
 481  *
 482  * PARAMS
 483  *  lpTimeZoneInformation [in]  The desired time zone.
 484  *  lpLocalTime           [in]  The local time.
 485  *  lpUniversalTime       [out] The calculated utc time.
 486  *
 487  * RETURNS
 488  *  Success: TRUE. lpUniversalTime contains the converted time.
 489  *  Failure: FALSE.
 490  */
 491 BOOL WINAPI TzSpecificLocalTimeToSystemTime(
 492     LPTIME_ZONE_INFORMATION lpTimeZoneInformation,
 493     LPSYSTEMTIME lpLocalTime, LPSYSTEMTIME lpUniversalTime)
 494 {
 495     FILETIME ft;
 496     LONG lBias;
 497     LONGLONG t;
 498     TIME_ZONE_INFORMATION tzinfo;
 499
 500     if (lpTimeZoneInformation != NULL)
 501     {
 502         tzinfo = *lpTimeZoneInformation;
 503     }
 504     else
 505     {
 506         if (GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_INVALID)
 507             return FALSE;
 508     }
 509
 510     if (!SystemTimeToFileTime(lpLocalTime, &ft))
 511         return FALSE;
 512     FILETIME2LL( &ft, t)
 513     if (!TIME_GetTimezoneBias(&tzinfo, &ft, TRUE, &lBias))
 514         return FALSE;
 515     /* convert minutes to 100-nanoseconds-ticks */
 516     t += (LONGLONG)lBias * 600000000;
 517     LL2FILETIME( t, &ft)
 518     return FileTimeToSystemTime(&ft, lpUniversalTime);
 519 }
 520
 521
 522 /***********************************************************************
 523  *              GetSystemTimeAsFileTime  (KERNEL32.@)
 524  *
 525  *  Get the current time in utc format.
 526  *
 527  *  RETURNS
 528  *   Nothing.
 529  */
 530 VOID WINAPI GetSystemTimeAsFileTime(
 531     LPFILETIME time) /* [out] Destination for the current utc time */
 532 {
 533     LARGE_INTEGER t;
 534     NtQuerySystemTime( &t );
 535     time->dwLowDateTime = t.u.LowPart;
 536     time->dwHighDateTime = t.u.HighPart;
 537 }
 538
 539
 540 /*********************************************************************
 541  *      TIME_ClockTimeToFileTime    (olorin@fandra.org, 20-Sep-1998)
 542  *
 543  *  Used by GetProcessTimes to convert clock_t into FILETIME.
 544  *
 545  *      Differences to UnixTimeToFileTime:
 546  *          1) Divided by CLK_TCK
 547  *          2) Time is relative. There is no 'starting date', so there is
 548  *             no need for offset correction, like in UnixTimeToFileTime
 549  */
 550 static void TIME_ClockTimeToFileTime(clock_t unix_time, LPFILETIME filetime)
 551 {
 552     long clocksPerSec = sysconf(_SC_CLK_TCK);
 553     ULONGLONG secs = RtlEnlargedUnsignedMultiply( unix_time, 10000000 );
 554     secs = RtlExtendedLargeIntegerDivide( secs, clocksPerSec, NULL );
 555     filetime->dwLowDateTime  = (DWORD)secs;
 556     filetime->dwHighDateTime = (DWORD)(secs >> 32);
 557 }
 558
 559 /*********************************************************************
 560  *      GetProcessTimes                         (KERNEL32.@)
 561  *
 562  *  Get the user and kernel execution times of a process,
 563  *  along with the creation and exit times if known.
 564  *
 565  * PARAMS
 566  *  hprocess       [in]  The process to be queried.
 567  *  lpCreationTime [out] The creation time of the process.
 568  *  lpExitTime     [out] The exit time of the process if exited.
 569  *  lpKernelTime   [out] The time spent in kernel routines in 100's of nanoseconds.
 570  *  lpUserTime     [out] The time spent in user routines in 100's of nanoseconds.
 571  *
 572  * RETURNS
 573  *  TRUE.
 574  *
 575  * NOTES
 576  *  olorin@fandra.org:
 577  *  Would be nice to subtract the cpu time used by Wine at startup.
 578  *  Also, there is a need to separate times used by different applications.
 579  *
 580  * BUGS
 581  *  KernelTime and UserTime are always for the current process
 582  */
 583 BOOL WINAPI GetProcessTimes( HANDLE hprocess, LPFILETIME lpCreationTime,
 584     LPFILETIME lpExitTime, LPFILETIME lpKernelTime, LPFILETIME lpUserTime )
 585 {
 586     struct tms tms;
 587     KERNEL_USER_TIMES pti;
 588
 589     times(&tms);
 590     TIME_ClockTimeToFileTime(tms.tms_utime,lpUserTime);
 591     TIME_ClockTimeToFileTime(tms.tms_stime,lpKernelTime);
 592     if (NtQueryInformationProcess( hprocess, ProcessTimes, &pti, sizeof(pti), NULL))
 593         return FALSE;
 594     LL2FILETIME( pti.CreateTime.QuadPart, lpCreationTime);
 595     LL2FILETIME( pti.ExitTime.QuadPart, lpExitTime);
 596     return TRUE;
 597 }
 598
 599 /*********************************************************************
 600  *      GetCalendarInfoA                                (KERNEL32.@)
 601  *
 602  */
 603 int WINAPI GetCalendarInfoA(LCID lcid, CALID Calendar, CALTYPE CalType,
 604                             LPSTR lpCalData, int cchData, LPDWORD lpValue)
 605 {
 606     int ret;
 607     LPWSTR lpCalDataW = NULL;
 608
 609     if (NLS_IsUnicodeOnlyLcid(lcid))
 610     {
 611       SetLastError(ERROR_INVALID_PARAMETER);
 612       return 0;
 613     }
 614
 615     if (cchData &&
 616         !(lpCalDataW = HeapAlloc(GetProcessHeap(), 0, cchData*sizeof(WCHAR))))
 617       return 0;
 618
 619     ret = GetCalendarInfoW(lcid, Calendar, CalType, lpCalDataW, cchData, lpValue);
 620     if(ret && lpCalDataW && lpCalData)
 621       WideCharToMultiByte(CP_ACP, 0, lpCalDataW, cchData, lpCalData, cchData, NULL, NULL);
 622     HeapFree(GetProcessHeap(), 0, lpCalDataW);
 623
 624     return ret;
 625 }
 626
 627 /*********************************************************************
 628  *      GetCalendarInfoW                                (KERNEL32.@)
 629  *
 630  */
 631 int WINAPI GetCalendarInfoW(LCID Locale, CALID Calendar, CALTYPE CalType,
 632                             LPWSTR lpCalData, int cchData, LPDWORD lpValue)
 633 {
 634     if (CalType & CAL_NOUSEROVERRIDE)
 635         FIXME("flag CAL_NOUSEROVERRIDE used, not fully implemented\n");
 636     if (CalType & CAL_USE_CP_ACP)
 637         FIXME("flag CAL_USE_CP_ACP used, not fully implemented\n");
 638
 639     if (CalType & CAL_RETURN_NUMBER) {
 640         if (lpCalData != NULL)
 641             WARN("lpCalData not NULL (%p) when it should!\n", lpCalData);
 642         if (cchData != 0)
 643             WARN("cchData not 0 (%d) when it should!\n", cchData);
 644     } else {
 645         if (lpValue != NULL)
 646             WARN("lpValue not NULL (%p) when it should!\n", lpValue);
 647     }
 648
 649     /* FIXME: No verification is made yet wrt Locale
 650      * for the CALTYPES not requiring GetLocaleInfoA */
 651     switch (CalType & ~(CAL_NOUSEROVERRIDE|CAL_RETURN_NUMBER|CAL_USE_CP_ACP)) {
 652         case CAL_ICALINTVALUE:
 653             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 654             return 0;
 655         case CAL_SCALNAME:
 656             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 657             return 0;
 658         case CAL_IYEAROFFSETRANGE:
 659             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 660             return 0;
 661         case CAL_SERASTRING:
 662             FIXME("Unimplemented caltype %d\n", CalType & 0xffff);
 663             return 0;
 664         case CAL_SSHORTDATE:
 665             return GetLocaleInfoW(Locale, LOCALE_SSHORTDATE, lpCalData, cchData);
 666         case CAL_SLONGDATE:
 667             return GetLocaleInfoW(Locale, LOCALE_SLONGDATE, lpCalData, cchData);
 668         case CAL_SDAYNAME1:
 669             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME1, lpCalData, cchData);
 670         case CAL_SDAYNAME2:
 671             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME2, lpCalData, cchData);
 672         case CAL_SDAYNAME3:
 673             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME3, lpCalData, cchData);
 674         case CAL_SDAYNAME4:
 675             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME4, lpCalData, cchData);
 676         case CAL_SDAYNAME5:
 677             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME5, lpCalData, cchData);
 678         case CAL_SDAYNAME6:
 679             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME6, lpCalData, cchData);
 680         case CAL_SDAYNAME7:
 681             return GetLocaleInfoW(Locale, LOCALE_SDAYNAME7, lpCalData, cchData);
 682         case CAL_SABBREVDAYNAME1:
 683             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME1, lpCalData, cchData);
 684         case CAL_SABBREVDAYNAME2:
 685             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME2, lpCalData, cchData);
 686         case CAL_SABBREVDAYNAME3:
 687             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME3, lpCalData, cchData);
 688         case CAL_SABBREVDAYNAME4:
 689             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME4, lpCalData, cchData);
 690         case CAL_SABBREVDAYNAME5:
 691             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME5, lpCalData, cchData);
 692         case CAL_SABBREVDAYNAME6:
 693             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME6, lpCalData, cchData);
 694         case CAL_SABBREVDAYNAME7:
 695             return GetLocaleInfoW(Locale, LOCALE_SABBREVDAYNAME7, lpCalData, cchData);
 696         case CAL_SMONTHNAME1:
 697             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME1, lpCalData, cchData);
 698         case CAL_SMONTHNAME2:
 699             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME2, lpCalData, cchData);
 700         case CAL_SMONTHNAME3:
 701             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME3, lpCalData, cchData);
 702         case CAL_SMONTHNAME4:
 703             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME4, lpCalData, cchData);
 704         case CAL_SMONTHNAME5:
 705             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME5, lpCalData, cchData);
 706         case CAL_SMONTHNAME6:
 707             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME6, lpCalData, cchData);
 708         case CAL_SMONTHNAME7:
 709             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME7, lpCalData, cchData);
 710         case CAL_SMONTHNAME8:
 711             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME8, lpCalData, cchData);
 712         case CAL_SMONTHNAME9:
 713             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME9, lpCalData, cchData);
 714         case CAL_SMONTHNAME10:
 715             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME10, lpCalData, cchData);
 716         case CAL_SMONTHNAME11:
 717             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME11, lpCalData, cchData);
 718         case CAL_SMONTHNAME12:
 719             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME12, lpCalData, cchData);
 720         case CAL_SMONTHNAME13:
 721             return GetLocaleInfoW(Locale, LOCALE_SMONTHNAME13, lpCalData, cchData);
 722         case CAL_SABBREVMONTHNAME1:
 723             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME1, lpCalData, cchData);
 724         case CAL_SABBREVMONTHNAME2:
 725             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME2, lpCalData, cchData);
 726         case CAL_SABBREVMONTHNAME3:
 727             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME3, lpCalData, cchData);
 728         case CAL_SABBREVMONTHNAME4:
 729             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME4, lpCalData, cchData);
 730         case CAL_SABBREVMONTHNAME5:
 731             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME5, lpCalData, cchData);
 732         case CAL_SABBREVMONTHNAME6:
 733             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME6, lpCalData, cchData);
 734         case CAL_SABBREVMONTHNAME7:
 735             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME7, lpCalData, cchData);
 736         case CAL_SABBREVMONTHNAME8:
 737             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME8, lpCalData, cchData);
 738         case CAL_SABBREVMONTHNAME9:
 739             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME9, lpCalData, cchData);
 740         case CAL_SABBREVMONTHNAME10:
 741             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME10, lpCalData, cchData);
 742         case CAL_SABBREVMONTHNAME11:
 743             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME11, lpCalData, cchData);
 744         case CAL_SABBREVMONTHNAME12:
 745             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME12, lpCalData, cchData);
 746         case CAL_SABBREVMONTHNAME13:
 747             return GetLocaleInfoW(Locale, LOCALE_SABBREVMONTHNAME13, lpCalData, cchData);
 748         case CAL_SYEARMONTH:
 749             return GetLocaleInfoW(Locale, LOCALE_SYEARMONTH, lpCalData, cchData);
 750         case CAL_ITWODIGITYEARMAX:
 751             if (lpValue) *lpValue = CALINFO_MAX_YEAR;
 752             break;
 753         default:
 754             FIXME("Unknown caltype %d\n",CalType & 0xffff);
 755             SetLastError(ERROR_INVALID_FLAGS);
 756             return 0;
 757     }
 758     return 0;
 759 }
 760
 761 /*********************************************************************
 762  *      SetCalendarInfoA                                (KERNEL32.@)
 763  *
 764  */
 765 int WINAPI      SetCalendarInfoA(LCID Locale, CALID Calendar, CALTYPE CalType, LPCSTR lpCalData)
 766 {
 767     FIXME("(%08x,%08x,%08x,%s): stub\n",
 768           Locale, Calendar, CalType, debugstr_a(lpCalData));
 769     return 0;
 770 }
 771
 772 /*********************************************************************
 773  *      SetCalendarInfoW                                (KERNEL32.@)
 774  *
 775  *
 776  */
 777 int WINAPI      SetCalendarInfoW(LCID Locale, CALID Calendar, CALTYPE CalType, LPCWSTR lpCalData)
 778 {
 779     FIXME("(%08x,%08x,%08x,%s): stub\n",
 780           Locale, Calendar, CalType, debugstr_w(lpCalData));
 781     return 0;
 782 }
 783
 784 /*********************************************************************
 785  *      LocalFileTimeToFileTime                         (KERNEL32.@)
 786  */
 787 BOOL WINAPI LocalFileTimeToFileTime( const FILETIME *localft, LPFILETIME utcft )
 788 {
 789     NTSTATUS status;
 790     LARGE_INTEGER local, utc;
 791
 792     local.u.LowPart = localft->dwLowDateTime;
 793     local.u.HighPart = localft->dwHighDateTime;
 794     if (!(status = RtlLocalTimeToSystemTime( &local, &utc )))
 795     {
 796         utcft->dwLowDateTime = utc.u.LowPart;
 797         utcft->dwHighDateTime = utc.u.HighPart;
 798     }
 799     else SetLastError( RtlNtStatusToDosError(status) );
 800
 801     return !status;
 802 }
 803
 804 /*********************************************************************
 805  *      FileTimeToLocalFileTime                         (KERNEL32.@)
 806  */
 807 BOOL WINAPI FileTimeToLocalFileTime( const FILETIME *utcft, LPFILETIME localft )
 808 {
 809     NTSTATUS status;
 810     LARGE_INTEGER local, utc;
 811
 812     utc.u.LowPart = utcft->dwLowDateTime;
 813     utc.u.HighPart = utcft->dwHighDateTime;
 814     if (!(status = RtlSystemTimeToLocalTime( &utc, &local )))
 815     {
 816         localft->dwLowDateTime = local.u.LowPart;
 817         localft->dwHighDateTime = local.u.HighPart;
 818     }
 819     else SetLastError( RtlNtStatusToDosError(status) );
 820
 821     return !status;
 822 }
 823
 824 /*********************************************************************
 825  *      FileTimeToSystemTime                            (KERNEL32.@)
 826  */
 827 BOOL WINAPI FileTimeToSystemTime( const FILETIME *ft, LPSYSTEMTIME syst )
 828 {
 829     TIME_FIELDS tf;
 830     LARGE_INTEGER t;
 831
 832     t.u.LowPart = ft->dwLowDateTime;
 833     t.u.HighPart = ft->dwHighDateTime;
 834     RtlTimeToTimeFields(&t, &tf);
 835
 836     syst->wYear = tf.Year;
 837     syst->wMonth = tf.Month;
 838     syst->wDay = tf.Day;
 839     syst->wHour = tf.Hour;
 840     syst->wMinute = tf.Minute;
 841     syst->wSecond = tf.Second;
 842     syst->wMilliseconds = tf.Milliseconds;
 843     syst->wDayOfWeek = tf.Weekday;
 844     return TRUE;
 845 }
 846
 847 /*********************************************************************
 848  *      SystemTimeToFileTime                            (KERNEL32.@)
 849  */
 850 BOOL WINAPI SystemTimeToFileTime( const SYSTEMTIME *syst, LPFILETIME ft )
 851 {
 852     TIME_FIELDS tf;
 853     LARGE_INTEGER t;
 854
 855     tf.Year = syst->wYear;
 856     tf.Month = syst->wMonth;
 857     tf.Day = syst->wDay;
 858     tf.Hour = syst->wHour;
 859     tf.Minute = syst->wMinute;
 860     tf.Second = syst->wSecond;
 861     tf.Milliseconds = syst->wMilliseconds;
 862
 863     if( !RtlTimeFieldsToTime(&tf, &t)) {
 864         SetLastError( ERROR_INVALID_PARAMETER);
 865         return FALSE;
 866     }
 867     ft->dwLowDateTime = t.u.LowPart;
 868     ft->dwHighDateTime = t.u.HighPart;
 869     return TRUE;
 870 }
 871
 872 /*********************************************************************
 873  *      CompareFileTime                                 (KERNEL32.@)
 874  *
 875  * Compare two FILETIME's to each other.
 876  *
 877  * PARAMS
 878  *  x [I] First time
 879  *  y [I] time to compare to x
 880  *
 881  * RETURNS
 882  *  -1, 0, or 1 indicating that x is less than, equal to, or greater
 883  *  than y respectively.
 884  */
 885 INT WINAPI CompareFileTime( const FILETIME *x, const FILETIME *y )
 886 {
 887     if (!x || !y) return -1;
 888
 889     if (x->dwHighDateTime > y->dwHighDateTime)
 890         return 1;
 891     if (x->dwHighDateTime < y->dwHighDateTime)
 892         return -1;
 893     if (x->dwLowDateTime > y->dwLowDateTime)
 894         return 1;
 895     if (x->dwLowDateTime < y->dwLowDateTime)
 896         return -1;
 897     return 0;
 898 }
 899
 900 /*********************************************************************
 901  *      GetLocalTime                                    (KERNEL32.@)
 902  *
 903  * Get the current local time.
 904  *
 905  * PARAMS
 906  *  systime [O] Destination for current time.
 907  *
 908  * RETURNS
 909  *  Nothing.
 910  */
 911 VOID WINAPI GetLocalTime(LPSYSTEMTIME systime)
 912 {
 913     FILETIME lft;
 914     LARGE_INTEGER ft, ft2;
 915
 916     NtQuerySystemTime(&ft);
 917     RtlSystemTimeToLocalTime(&ft, &ft2);
 918     lft.dwLowDateTime = ft2.u.LowPart;
 919     lft.dwHighDateTime = ft2.u.HighPart;
 920     FileTimeToSystemTime(&lft, systime);
 921 }
 922
 923 /*********************************************************************
 924  *      GetSystemTime                                   (KERNEL32.@)
 925  *
 926  * Get the current system time.
 927  *
 928  * PARAMS
 929  *  systime [O] Destination for current time.
 930  *
 931  * RETURNS
 932  *  Nothing.
 933  */
 934 VOID WINAPI GetSystemTime(LPSYSTEMTIME systime)
 935 {
 936     FILETIME ft;
 937     LARGE_INTEGER t;
 938
 939     NtQuerySystemTime(&t);
 940     ft.dwLowDateTime = t.u.LowPart;
 941     ft.dwHighDateTime = t.u.HighPart;
 942     FileTimeToSystemTime(&ft, systime);
 943 }
 944
 945 /*********************************************************************
 946  *      GetDaylightFlag                                   (KERNEL32.@)
 947  *
 948  *  Specifies if daylight savings time is in operation.
 949  *
 950  * NOTES
 951  *  This function is called from the Win98's control applet timedate.cpl.
 952  *
 953  * RETURNS
 954  *  TRUE if daylight savings time is in operation.
 955  *  FALSE otherwise.
 956  */
 957 BOOL WINAPI GetDaylightFlag(void)
 958 {
 959     TIME_ZONE_INFORMATION tzinfo;
 960     return GetTimeZoneInformation( &tzinfo) == TIME_ZONE_ID_DAYLIGHT;
 961 }
 962
 963 /***********************************************************************
 964  *           DosDateTimeToFileTime   (KERNEL32.@)
 965  */
 966 BOOL WINAPI DosDateTimeToFileTime( WORD fatdate, WORD fattime, LPFILETIME ft)
 967 {
 968     struct tm newtm;
 969 #ifndef HAVE_TIMEGM
 970     struct tm *gtm;
 971     time_t time1, time2;
 972 #endif
 973
 974     newtm.tm_sec  = (fattime & 0x1f) * 2;
 975     newtm.tm_min  = (fattime >> 5) & 0x3f;
 976     newtm.tm_hour = (fattime >> 11);
 977     newtm.tm_mday = (fatdate & 0x1f);
 978     newtm.tm_mon  = ((fatdate >> 5) & 0x0f) - 1;
 979     newtm.tm_year = (fatdate >> 9) + 80;
 980     newtm.tm_isdst = -1;
 981 #ifdef HAVE_TIMEGM
 982     RtlSecondsSince1970ToTime( timegm(&newtm), (LARGE_INTEGER *)ft );
 983 #else
 984     time1 = mktime(&newtm);
 985     gtm = gmtime(&time1);
 986     time2 = mktime(gtm);
 987     RtlSecondsSince1970ToTime( 2*time1-time2, (LARGE_INTEGER *)ft );
 988 #endif
 989     return TRUE;
 990 }
 991
 992
 993 /***********************************************************************
 994  *           FileTimeToDosDateTime   (KERNEL32.@)
 995  */
 996 BOOL WINAPI FileTimeToDosDateTime( const FILETIME *ft, LPWORD fatdate,
 997                                      LPWORD fattime )
 998 {
 999     LARGE_INTEGER       li;
1000     ULONG               t;
1001     time_t              unixtime;
1002     struct tm*          tm;
1003
1004     li.u.LowPart = ft->dwLowDateTime;
1005     li.u.HighPart = ft->dwHighDateTime;
1006     RtlTimeToSecondsSince1970( &li, &t );
1007     unixtime = t;
1008     tm = gmtime( &unixtime );
1009     if (fattime)
1010         *fattime = (tm->tm_hour << 11) + (tm->tm_min << 5) + (tm->tm_sec / 2);
1011     if (fatdate)
1012         *fatdate = ((tm->tm_year - 80) << 9) + ((tm->tm_mon + 1) << 5)
1013                    + tm->tm_mday;
1014     return TRUE;
1015 }