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// Windows/Time.cpp
#include "StdAfx.h"
#include "Time.h"
#include "Windows/Defs.h"
namespace NWindows {
namespace NTime {
static const UInt32 kFileTimeStartYear = 1601;
bool DosTimeToFileTime(UInt32 dosTime, FILETIME &fileTime)
{
return BOOLToBool(::DosDateTimeToFileTime((UInt16)(dosTime >> 16), (UInt16)(dosTime & 0xFFFF), &fileTime));
}
static const UInt32 kHighDosTime = 0xFF9FBF7D;
static const UInt32 kLowDosTime = 0x210000;
bool FileTimeToDosTime(const FILETIME &fileTime, UInt32 &dosTime)
{
WORD datePart, timePart;
if (!::FileTimeToDosDateTime(&fileTime, &datePart, &timePart))
{
dosTime = (fileTime.dwHighDateTime >= 0x01C00000) ? kHighDosTime : kLowDosTime;
return false;
}
dosTime = (((UInt32)datePart) << 16) + timePart;
return true;
}
static const UInt32 kNumTimeQuantumsInSecond = 10000000;
static const UInt64 kUnixTimeStartValue = ((UInt64)kNumTimeQuantumsInSecond) * 60 * 60 * 24 * 134774;
void UnixTimeToFileTime(UInt32 unixTime, FILETIME &fileTime)
{
UInt64 v = kUnixTimeStartValue + ((UInt64)unixTime) * kNumTimeQuantumsInSecond;
fileTime.dwLowDateTime = (DWORD)v;
fileTime.dwHighDateTime = (DWORD)(v >> 32);
}
bool FileTimeToUnixTime(const FILETIME &fileTime, UInt32 &unixTime)
{
UInt64 winTime = (((UInt64)fileTime.dwHighDateTime) << 32) + fileTime.dwLowDateTime;
if (winTime < kUnixTimeStartValue)
{
unixTime = 0;
return false;
}
winTime = (winTime - kUnixTimeStartValue) / kNumTimeQuantumsInSecond;
if (winTime > 0xFFFFFFFF)
{
unixTime = 0xFFFFFFFF;
return false;
}
unixTime = (UInt32)winTime;
return true;
}
bool GetSecondsSince1601(unsigned year, unsigned month, unsigned day,
unsigned hour, unsigned min, unsigned sec, UInt64 &resSeconds)
{
resSeconds = 0;
if (year < kFileTimeStartYear || year >= 10000 || month < 1 || month > 12 ||
day < 1 || day > 31 || hour > 23 || min > 59 || sec > 59)
return false;
UInt32 numYears = year - kFileTimeStartYear;
UInt32 numDays = numYears * 365 + numYears / 4 - numYears / 100 + numYears / 400;
Byte ms[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0))
ms[1] = 29;
month--;
for (unsigned i = 0; i < month; i++)
numDays += ms[i];
numDays += day - 1;
resSeconds = ((UInt64)(numDays * 24 + hour) * 60 + min) * 60 + sec;
return true;
}
void GetCurUtcFileTime(FILETIME &ft)
{
SYSTEMTIME st;
GetSystemTime(&st);
SystemTimeToFileTime(&st, &ft);
}
}}
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