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svn path=/trunk/; revision=27
This commit is contained in:
Rex Jolliff 1998-09-05 17:18:00 +00:00
parent 38389db926
commit f29364e917
2 changed files with 184 additions and 6 deletions
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4
reactos/ntoskrnl/makefile_rex
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@ -49,6 +49,8 @@ OBJECTS = $(HAL_OBJECTS) $(KE_OBJECTS) $(RTL_OBJECTS) $(MM_OBJECTS) \
$(IO_OBJECTS) $(OB_OBJECTS) $(PS_OBJECTS) $(EX_OBJECTS) \
$(SE_OBJECTS) $(CFG_OBJECTS) $(TST_OBJECTS) $(DBG_OBJECTS)
LIBS = d:/tools/djgpp/lib/gcc-lib/djgpp/2.81/libgcc.a
utils/export/export$(EXE_POSTFIX): utils/export/export.c
$(NATIVE_CC) -g utils/export/export.c -o utils/export/export$(EXE_POSTFIX)
@ -57,7 +59,7 @@ ke/exports.o: exports.lst utils/export/export$(EXE_POSTFIX)
$(CC) $(CFLAGS) -c ke/exports.c -o ke/exports.o
kimage: $(OBJECTS)
$(LD) --defsym _end=end --defsym _etext=etext --oformat=$(KERNEL_BFD_TARGET) -Ttext c0000000 $(LDFLAGS) $(OBJECTS) -o kimage
$(LD) --defsym _end=end --defsym _etext=etext --oformat=$(KERNEL_BFD_TARGET) -Ttext c0000000 $(LDFLAGS) $(OBJECTS) $(LIBS) -o kimage
$(NM) --numeric-sort kimage > kernel.sym
$(OBJCOPY) -O binary kimage kimage.bin

184
reactos/ntoskrnl/rtl/time.c
View file

@ -2,10 +2,11 @@
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: kernel/rtl/time.c
* PURPOSE: Graceful system shutdown if a bug is detected
* PROGRAMMER: David Welch (welch@mcmail.com)
* PURPOSE: Conversion between Time and TimeFields
* PROGRAMMER: Rex Jolliff (rex@lvcablemodem.com)
* UPDATE HISTORY:
* Created 22/05/98
* 08/03/98 RJJ Implemented these functions
*/
/* INCLUDES *****************************************************************/
@ -16,16 +17,191 @@
#include <internal/debug.h>
#define TICKSPERSEC 10000000
#define TICKSPERMSEC 10000
#define SECSPERDAY 86400
#define SECSPERHOUR 3600
#define SECSPERMIN 60
#define MINSPERHOUR 60
#define HOURSPERDAY 24
/* FIXME: get the correct day of week for the epoch date */
#define EPOCHWEEKDAY 0
#define DAYSPERWEEK 7
#define EPOCHYEAR 1601
#define DAYSPERNORMALYEAR 365
#define DAYSPERLEAPYEAR 366
#define MONSPERYEAR 12
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 },
{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
};
static __inline int IsLeapYear(int Year)
{
return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 1 : 0;
}
static __inline void NormalizeTimeFields(CSHORT *FieldToNormalize,
CSHORT *CarryField,
int Modulus)
{
*FieldToNormalize = (CSHORT) (*FieldToNormalize - Modulus);
*CarryField = (CSHORT) (*CarryField + 1);
}
/* FUNCTIONS *****************************************************************/
VOID RtlTimeToTimeFields(PLARGE_INTEGER Time,
VOID RtlTimeToTimeFields(PLARGE_INTEGER liTime,
PTIME_FIELDS TimeFields)
{
#if 1
const int *Months;
int LeapSecondCorrections, SecondsInDay, CurYear;
int LeapYear, CurMonth, GMTOffset;
long int Days;
long long int Time = *(long long int *)&liTime;
/* Extract millisecond from time and convert time into seconds */
TimeFields->Milliseconds = (CSHORT) ((Time % TICKSPERSEC) / TICKSPERMSEC);
Time = Time / TICKSPERSEC;
/* FIXME: Compute the number of leap second corrections here */
LeapSecondCorrections = 0;
/* FIXME: get the GMT offset here */
GMTOffset = 0;
/* Split the time into days and seconds within the day */
Days = Time / SECSPERDAY;
SecondsInDay = Time % SECSPERDAY;
/* Adjust the values for GMT and leap seconds */
SecondsInDay += (GMTOffset - LeapSecondCorrections);
while (SecondsInDay < 0)
{
SecondsInDay += SECSPERDAY;
Days--;
}
while (SecondsInDay >= SECSPERDAY)
{
SecondsInDay -= SECSPERDAY;
Days++;
}
/* compute time of day */
TimeFields->Hour = (CSHORT) (SecondsInDay / SECSPERHOUR);
SecondsInDay = SecondsInDay % SECSPERHOUR;
TimeFields->Minute = (CSHORT) (SecondsInDay / SECSPERMIN);
TimeFields->Second = (CSHORT) (SecondsInDay % SECSPERMIN);
/* FIXME: handle the possibility that we are on a leap second (i.e. Second = 60) */
/* compute day of week */
TimeFields->Weekday = (CSHORT) ((EPOCHWEEKDAY + Days) % DAYSPERWEEK);
/* compute year */
CurYear = EPOCHYEAR;
/* FIXME: handle calendar modifications */
while (1)
{
LeapYear = IsLeapYear(CurYear);
if (Days < (long) YearLengths[LeapYear])
{
break;
}
CurYear++;
Days = Days - (long) YearLengths[LeapYear];
}
TimeFields->Year = (CSHORT) CurYear;
/* Compute month of year */
Months = MonthLengths[LeapYear];
for (CurMonth = 0; Days >= (long) Months[CurMonth]; CurMonth++)
Days = Days - (long) Months[CurMonth];
TimeFields->Month = (CSHORT) (CurMonth + 1);
TimeFields->Day = (CSHORT) (Days + 1);
#else
UNIMPLEMENTED;
#endif
}
BOOLEAN RtlTimeFieldsToTime(PTIME_FIELDS TimeFields,
BOOLEAN RtlTimeFieldsToTime(PTIME_FIELDS tfTimeFields,
PLARGE_INTEGER Time)
{
#if 1
int CurYear, CurMonth;
long long int rcTime;
TIME_FIELDS TimeFields = *tfTimeFields;
rcTime = 0;
/* FIXME: normalize the TIME_FIELDS structure here */
while (TimeFields.Second >= SECSPERMIN)
{
NormalizeTimeFields(&TimeFields.Second,
&TimeFields.Minute,
SECSPERMIN);
}
while (TimeFields.Minute >= MINSPERHOUR)
{
NormalizeTimeFields(&TimeFields.Minute,
&TimeFields.Hour,
MINSPERHOUR);
}
while (TimeFields.Hour >= HOURSPERDAY)
{
NormalizeTimeFields(&TimeFields.Hour,
&TimeFields.Day,
HOURSPERDAY);
}
while (TimeFields.Day >
MonthLengths[IsLeapYear(TimeFields.Year)][TimeFields.Month - 1])
{
NormalizeTimeFields(&TimeFields.Day,
&TimeFields.Month,
SECSPERMIN);
}
while (TimeFields.Month > MONSPERYEAR)
{
NormalizeTimeFields(&TimeFields.Month,
&TimeFields.Year,
MONSPERYEAR);
}
/* FIXME: handle calendar corrections here */
for (CurYear = EPOCHYEAR; CurYear < TimeFields.Year; CurYear++)
{
rcTime += YearLengths[IsLeapYear(CurYear)];
}
for (CurMonth = 1; CurMonth < TimeFields.Month; CurMonth++)
{
rcTime += MonthLengths[IsLeapYear(CurYear)][CurMonth - 1];
}
rcTime += TimeFields.Day - 1;
rcTime *= SECSPERDAY;
rcTime += TimeFields.Hour * SECSPERHOUR + TimeFields.Minute * SECSPERMIN +
TimeFields.Second;
rcTime *= TICKSPERSEC;
rcTime += TimeFields.Milliseconds * TICKSPERMSEC;
*Time = *(LARGE_INTEGER *)&rcTime;
return TRUE;
#else
UNIMPLEMENTED;
#endif
}