michael@0: // Windows/Time.h
michael@0: 
michael@0: #ifndef __WINDOWS_TIME_H
michael@0: #define __WINDOWS_TIME_H
michael@0: 
michael@0: #include "Common/Types.h"
michael@0: #include "Windows/Defs.h"
michael@0: 
michael@0: namespace NWindows {
michael@0: namespace NTime {
michael@0: 
michael@0: inline bool DosTimeToFileTime(UInt32 dosTime, FILETIME &fileTime)
michael@0: {
michael@0:   return BOOLToBool(::DosDateTimeToFileTime(UInt16(dosTime >> 16), 
michael@0:       UInt16(dosTime & 0xFFFF), &fileTime));
michael@0: }
michael@0: 
michael@0: const UInt32 kHighDosTime = 0xFF9FBF7D;
michael@0: const UInt32 kLowDosTime = 0x210000;
michael@0: 
michael@0: inline bool FileTimeToDosTime(const FILETIME &fileTime, UInt32 &dosTime)
michael@0: {
michael@0:   WORD datePart, timePart;
michael@0:   if (!::FileTimeToDosDateTime(&fileTime, &datePart, &timePart))
michael@0:   {
michael@0:     if (fileTime.dwHighDateTime >= 0x01C00000) // 2000
michael@0:       dosTime = kHighDosTime;
michael@0:     else
michael@0:       dosTime = kLowDosTime;
michael@0:     return false;
michael@0:   }
michael@0:   dosTime = (((UInt32)datePart) << 16) + timePart;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: const UInt32 kNumTimeQuantumsInSecond = 10000000;
michael@0: const UInt64 kUnixTimeStartValue = ((UInt64)kNumTimeQuantumsInSecond) * 60 * 60 * 24 * 134774;
michael@0: 
michael@0: inline void UnixTimeToFileTime(UInt32 unixTime, FILETIME &fileTime)
michael@0: {
michael@0:   UInt64 v = kUnixTimeStartValue + ((UInt64)unixTime) * kNumTimeQuantumsInSecond;
michael@0:   fileTime.dwLowDateTime = (DWORD)v;
michael@0:   fileTime.dwHighDateTime = (DWORD)(v >> 32);
michael@0: }
michael@0: 
michael@0: inline bool FileTimeToUnixTime(const FILETIME &fileTime, UInt32 &unixTime)
michael@0: {
michael@0:   UInt64 winTime = (((UInt64)fileTime.dwHighDateTime) << 32) + fileTime.dwLowDateTime;
michael@0:   if (winTime < kUnixTimeStartValue)
michael@0:   {
michael@0:     unixTime = 0;
michael@0:     return false;
michael@0:   }
michael@0:   winTime = (winTime - kUnixTimeStartValue) / kNumTimeQuantumsInSecond;
michael@0:   if (winTime > 0xFFFFFFFF)
michael@0:   {
michael@0:     unixTime = 0xFFFFFFFF;
michael@0:     return false;
michael@0:   }
michael@0:   unixTime = (UInt32)winTime;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: }}
michael@0: 
michael@0: #endif