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Fixed the value for EPOCHWEEKDAY.

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Improve converting speed in RtlTimeToTimeFields.

svn path=/trunk/; revision=3584
This commit is contained in:
Hartmut Birr 2002-09-30 20:57:54 +00:00
parent ffe7ccffd2
commit dad0922fda
1 changed files with 10 additions and 2 deletions
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12
reactos/lib/ntdll/rtl/time.c
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@ -1,4 +1,4 @@
/* $Id: time.c,v 1.12 2002/09/08 10:23:07 chorns Exp $ /* $Id: time.c,v 1.13 2002/09/30 20:57:54 hbirr Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -23,7 +23,7 @@
#define SECSPERMIN 60 #define SECSPERMIN 60
#define MINSPERHOUR 60 #define MINSPERHOUR 60
#define HOURSPERDAY 24 #define HOURSPERDAY 24
#define EPOCHWEEKDAY 0 #define EPOCHWEEKDAY 1
#define DAYSPERWEEK 7 #define DAYSPERWEEK 7
#define EPOCHYEAR 1601 #define EPOCHYEAR 1601
#define DAYSPERNORMALYEAR 365 #define DAYSPERNORMALYEAR 365
@ -139,6 +139,13 @@ RtlTimeToTimeFields(PLARGE_INTEGER liTime,
/* compute year */ /* compute year */
CurYear = EPOCHYEAR; CurYear = EPOCHYEAR;
CurYear += Days / DAYSPERLEAPYEAR;
Days -= (CurYear - EPOCHYEAR) * DAYSPERLEAPYEAR;
CurYear--; /* The next calculation needs CurYear - 1 */
Days += CurYear - CurYear / 4 + CurYear / 100 - CurYear / 400;
CurYear++;
Days -= EPOCHYEAR - 1 - (EPOCHYEAR -1) / 4 + (EPOCHYEAR -1) / 100 - (EPOCHYEAR - 1) / 400;
/* FIXME: handle calendar modifications */ /* FIXME: handle calendar modifications */
while (1) while (1)
{ {
@ -153,6 +160,7 @@ RtlTimeToTimeFields(PLARGE_INTEGER liTime,
TimeFields->Year = (CSHORT) CurYear; TimeFields->Year = (CSHORT) CurYear;
/* Compute month of year */ /* Compute month of year */
LeapYear = IsLeapYear(CurYear);
Months = MonthLengths[LeapYear]; Months = MonthLengths[LeapYear];
for (CurMonth = 0; Days >= (long) Months[CurMonth]; CurMonth++) for (CurMonth = 0; Days >= (long) Months[CurMonth]; CurMonth++)
Days = Days - (long) Months[CurMonth]; Days = Days - (long) Months[CurMonth];