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