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/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
datetime.c
Abstract:
This module contains the function to retrive time and date information.
Author:
Michael Jarus (mjarus) 04-Jan-1993
Revision History:
--*/
#define INCL_OS2V20_ERRORS
#include "os2ssrtl.h"
#if DBG
extern ULONG Os2Debug;
#endif
APIRET
Or2GetDateTimeInfo(
PLARGE_INTEGER pSystemTime,
PLARGE_INTEGER pLocalTime,
PTIME_FIELDS pNtDateTime,
PVOID pSystemInformation,
PSHORT pTimeZone
)
{
NTSTATUS Status;
ULONG Remainder;
BOOLEAN Sign;
LARGE_INTEGER ZoneTime;
PSYSTEM_TIMEOFDAY_INFORMATION pLocalSystemInformation =
(PSYSTEM_TIMEOFDAY_INFORMATION)pSystemInformation;
Status = NtQuerySystemTime(
pSystemTime
);
if (!NT_SUCCESS( Status ))
{
#if DBG
IF_OS2_DEBUG ( TIMERS )
{
KdPrint(("Or2GetDateTimeInfo: NtQuerySystemTime rc %lx\n",
Status));
}
#endif
return (Or2MapNtStatusToOs2Error(Status, ERROR_INVALID_PARAMETER ));
}
//
// Convert UTC to Local time
//
Status = RtlSystemTimeToLocalTime (
pSystemTime,
pLocalTime
);
if (!NT_SUCCESS( Status ))
{
#if DBG
IF_OS2_DEBUG ( TIMERS )
{
KdPrint(("Or2GetDateTimeInfo: RtlSystemTimeToLocalTime rc %lx\n",
Status));
}
#endif
return (Or2MapNtStatusToOs2Error(Status, ERROR_INVALID_PARAMETER ));
}
RtlTimeToTimeFields( pLocalTime, pNtDateTime );
Status = NtQuerySystemInformation (
SystemTimeOfDayInformation,
pSystemInformation,
sizeof(SYSTEM_TIMEOFDAY_INFORMATION),
NULL
);
if (!NT_SUCCESS(Status))
{
#if DBG
IF_OS2_DEBUG ( TIMERS )
{
KdPrint(("Or2sGetDateTimInfoe: NtQuerySystemInformation rc %lx\n",
Status));
}
#endif
return (Or2MapNtStatusToOs2Error(Status, ERROR_INVALID_PARAMETER ));
}
if (pLocalSystemInformation->TimeZoneBias.HighPart < 0)
{
Sign = TRUE;
pLocalSystemInformation->TimeZoneBias = RtlLargeIntegerNegate(
pLocalSystemInformation->TimeZoneBias
);
} else
{
Sign = FALSE;
}
ZoneTime = RtlExtendedLargeIntegerDivide (
pLocalSystemInformation->TimeZoneBias,
60*1000*10000, /* converts 100nSec to Min */
&Remainder
);
if (Sign)
{
*pTimeZone = -(SHORT)ZoneTime.LowPart;
} else
{
*pTimeZone = (SHORT)ZoneTime.LowPart;
}
return(0);
}
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