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// Windows/TimeUtils.cpp↩
↩
#include "StdAfx.h"↩
↩
#include "Defs.h"↩
#include "TimeUtils.h"↩
↩
namespace NWindows {↩
namespace NTime {↩
↩
static const UInt32 kNumTimeQuantumsInSecond = 10000000;↩
static const UInt32 kFileTimeStartYear = 1601;↩
static const UInt32 kDosTimeStartYear = 1980;↩
static const UInt32 kUnixTimeStartYear = 1970;↩
static const UInt64 kUnixTimeOffset =↩
(UInt64)60 * 60 * 24 * (89 + 365 * (kUnixTimeStartYear - kFileTimeStartYear));↩
static const UInt64 kNumSecondsInFileTime = (UInt64)(Int64)-1 / kNumTimeQuantumsInSecond;↩
↩
bool DosTimeToFileTime(UInt32 dosTime, FILETIME &ft) throw()↩
{↩
#if defined(_WIN32) && !defined(UNDER_CE)↩
return BOOLToBool(::DosDateTimeToFileTime((UInt16)(dosTime >> 16), (UInt16)(dosTime & 0xFFFF), &ft));↩
#else↩
ft.dwLowDateTime = 0;↩
ft.dwHighDateTime = 0;↩
UInt64 res;↩
if (!GetSecondsSince1601(kDosTimeStartYear + (dosTime >> 25), (dosTime >> 21) & 0xF, (dosTime >> 16) & 0x1F,↩
(dosTime >> 11) & 0x1F, (dosTime >> 5) & 0x3F, (dosTime & 0x1F) * 2, res))↩
return false;↩
res *= kNumTimeQuantumsInSecond;↩
ft.dwLowDateTime = (UInt32)res;↩
ft.dwHighDateTime = (UInt32)(res >> 32);↩
return true;↩
#endif↩
}↩
↩
static const UInt32 kHighDosTime = 0xFF9FBF7D;↩
static const UInt32 kLowDosTime = 0x210000;↩
↩
#define PERIOD_4 (4 * 365 + 1)↩
#define PERIOD_100 (PERIOD_4 * 25 - 1)↩
#define PERIOD_400 (PERIOD_100 * 4 + 1)↩
↩
bool FileTimeToDosTime(const FILETIME &ft, UInt32 &dosTime) throw()↩
{↩
#if defined(_WIN32) && !defined(UNDER_CE)↩
↩
WORD datePart, timePart;↩
if (!::FileTimeToDosDateTime(&ft, &datePart, &timePart))↩
{↩
dosTime = (ft.dwHighDateTime >= 0x01C00000) ? kHighDosTime : kLowDosTime;↩
return false;↩
}↩
dosTime = (((UInt32)datePart) << 16) + timePart;↩
↩
#else↩
↩
unsigned year, mon, day, hour, min, sec;↩
UInt64 v64 = ft.dwLowDateTime | ((UInt64)ft.dwHighDateTime << 32);↩
Byte ms[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };↩
unsigned temp;↩
UInt32 v;↩
v64 += (kNumTimeQuantumsInSecond * 2 - 1);↩
v64 /= kNumTimeQuantumsInSecond;↩
sec = (unsigned)(v64 % 60);↩
v64 /= 60;↩
min = (unsigned)(v64 % 60);↩
v64 /= 60;↩
hour = (unsigned)(v64 % 24);↩
v64 /= 24;↩
↩
v = (UInt32)v64;↩
↩
year = (unsigned)(kFileTimeStartYear + v / PERIOD_400 * 400);↩
v %= PERIOD_400;↩
↩
temp = (unsigned)(v / PERIOD_100);↩
if (temp == 4)↩
temp = 3;↩
year += temp * 100;↩
v -= temp * PERIOD_100;↩
↩
temp = v / PERIOD_4;↩
if (temp == 25)↩
temp = 24;↩
year += temp * 4;↩
v -= temp * PERIOD_4;↩
↩
temp = v / 365;↩
if (temp == 4)↩
temp = 3;↩
year += temp;↩
v -= temp * 365;↩
↩
if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0))↩
ms[1] = 29;↩
for (mon = 1; mon <= 12; mon++)↩
{↩
unsigned s = ms[mon - 1];↩
if (v < s)↩
break;↩
v -= s;↩
}↩
day = (unsigned)v + 1;↩
↩
dosTime = kLowDosTime;↩
if (year < kDosTimeStartYear)↩
return false;↩
year -= kDosTimeStartYear;↩
dosTime = kHighDosTime;↩
if (year >= 128)↩
return false;↩
dosTime = (year << 25) | (mon << 21) | (day << 16) | (hour << 11) | (min << 5) | (sec >> 1);↩
#endif↩
return true;↩
}↩
↩
UInt64 UnixTimeToFileTime64(UInt32 unixTime) throw()↩
{↩
return (kUnixTimeOffset + (UInt64)unixTime) * kNumTimeQuantumsInSecond;↩
}↩
↩
void UnixTimeToFileTime(UInt32 unixTime, FILETIME &ft) throw()↩
{↩
UInt64 v = UnixTimeToFileTime64(unixTime);↩
ft.dwLowDateTime = (DWORD)v;↩
ft.dwHighDateTime = (DWORD)(v >> 32);↩
}↩
↩
UInt64 UnixTime64ToFileTime64(Int64 unixTime) throw()↩
{↩
return (UInt64)(kUnixTimeOffset + unixTime) * kNumTimeQuantumsInSecond;↩
}↩
↩
bool UnixTime64ToFileTime(Int64 unixTime, FILETIME &ft) throw()↩
{↩
if (unixTime > (Int64)(kNumSecondsInFileTime - kUnixTimeOffset))↩
{↩
ft.dwLowDateTime = ft.dwHighDateTime = (UInt32)(Int32)-1;↩
return false;↩
}↩
Int64 v = (Int64)kUnixTimeOffset + unixTime;↩
if (v < 0)↩
{↩
ft.dwLowDateTime = ft.dwHighDateTime = 0;↩
return false;↩
}↩
UInt64 v2 = (UInt64)v * kNumTimeQuantumsInSecond;↩
ft.dwLowDateTime = (DWORD)v2;↩
ft.dwHighDateTime = (DWORD)(v2 >> 32);↩
return true;↩
}↩
↩
Int64 FileTimeToUnixTime64(const FILETIME &ft) throw()↩
{↩
UInt64 winTime = (((UInt64)ft.dwHighDateTime) << 32) + ft.dwLowDateTime;↩
return (Int64)(winTime / kNumTimeQuantumsInSecond) - (Int64)kUnixTimeOffset;↩
}↩
↩
bool FileTimeToUnixTime(const FILETIME &ft, UInt32 &unixTime) throw()↩
{↩
UInt64 winTime = (((UInt64)ft.dwHighDateTime) << 32) + ft.dwLowDateTime;↩
winTime /= kNumTimeQuantumsInSecond;↩
if (winTime < kUnixTimeOffset)↩
{↩
unixTime = 0;↩
return false;↩
}↩
winTime -= kUnixTimeOffset;↩
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) throw()↩
{↩
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) throw()↩
{↩
// Both variants provide same low resolution on WinXP: about 15 ms.↩
// But GetSystemTimeAsFileTime is much faster.↩
↩
#ifdef UNDER_CE↩
SYSTEMTIME st;↩
GetSystemTime(&st);↩
SystemTimeToFileTime(&st, &ft);↩
#else↩
GetSystemTimeAsFileTime(&ft);↩
#endif↩
}↩
↩
}}↩