diff options
Diffstat (limited to 'CPP/Windows/Time.cpp')
-rwxr-xr-x | CPP/Windows/Time.cpp | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/CPP/Windows/Time.cpp b/CPP/Windows/Time.cpp new file mode 100755 index 00000000..810dcbe2 --- /dev/null +++ b/CPP/Windows/Time.cpp @@ -0,0 +1,86 @@ +// Windows/Time.cpp + +#include "StdAfx.h" + +#include "Time.h" +#include "Windows/Defs.h" + +namespace NWindows { +namespace NTime { + +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 < 1601 || year >= 10000 || month < 1 || month > 12 || + day < 1 || day > 31 || hour > 23 || min > 59 || sec > 59) + return false; + UInt32 numYears = year - 1601; + 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); +} + +}} |