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