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Commit f66af599 authored by Huw Davies's avatar Huw Davies Committed by Alexandre Julliard
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Speed up RtlTimeFieldsToTime.

parent 9f9462a1
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Showing with 13 additions and 6 deletions
dlls/ntdll/time.c
View file @ f66af599
......@@ -284,7 +284,6 @@ static const struct tagTZ_INFO TZ_INFO[] =
#define TICKS_1601_TO_1980 (SECS_1601_TO_1980 * TICKSPERSEC)
static const int YearLengths[2] = {DAYSPERNORMALYEAR, DAYSPERLEAPYEAR};
static const int MonthLengths[2][MONSPERYEAR] =
{
{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
......@@ -421,7 +420,7 @@ BOOLEAN WINAPI RtlTimeFieldsToTime(
PTIME_FIELDS tfTimeFields,
PLARGE_INTEGER Time)
{
int CurYear, CurMonth;
int CurYear, CurMonth, DeltaYear;
LONGLONG rcTime;
TIME_FIELDS TimeFields = *tfTimeFields;
......@@ -445,9 +444,18 @@ BOOLEAN WINAPI RtlTimeFieldsToTime(
}
/* FIXME: handle calendar corrections here */
for (CurYear = EPOCHYEAR; CurYear < TimeFields.Year; CurYear++)
{ rcTime += YearLengths[IsLeapYear(CurYear)];
}
CurYear = TimeFields.Year - EPOCHYEAR;
DeltaYear = CurYear / 400;
CurYear -= DeltaYear * 400;
rcTime += DeltaYear * DAYSPERQUADRICENTENNIUM;
DeltaYear = CurYear / 100;
CurYear -= DeltaYear * 100;
rcTime += DeltaYear * DAYSPERNORMALCENTURY;
DeltaYear = CurYear / 4;
CurYear -= DeltaYear * 4;
rcTime += DeltaYear * DAYSPERNORMALQUADRENNIUM;
rcTime += CurYear * DAYSPERNORMALYEAR;
for (CurMonth = 1; CurMonth < TimeFields.Month; CurMonth++)
{ rcTime += MonthLengths[IsLeapYear(CurYear)][CurMonth - 1];
}
......@@ -460,7 +468,6 @@ BOOLEAN WINAPI RtlTimeFieldsToTime(
return TRUE;
}
/************ end of code by Rex Jolliff (rex@lvcablemodem.com) ***************/
/******************************************************************************
* RtlLocalTimeToSystemTime [NTDLL.@]
......
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