//===========================================================================
//FILETIME構造体をTTimeStampに変換して文字列として取得する
//===========================================================================
String __fastcall TAttacheCaseFileEncrypt::TimeStampToString(FILETIME ft)
{
SYSTEMTIME st;
TDateTime dt;
TTimeStamp ts;
//FileTime → SystemFileTime
FileTimeToSystemTime(&ft, &st);
//SystemTime → TDateTime
dt = SystemTimeToDateTime(st);
//TDateTime → TimeStamp
ts = DateTimeToTimeStamp(dt);
/*
//ファイル/ディレクトリの日時をなぜ
//わざわざサイズが大きいTTimeStampに変換して格納したのか？
//ごめんなさい、意味はありません(笑)。
struct TTimeStamp
{
int Time;
int Date;
};
*/
return(IntToStr(ts.Date)+"\t"+IntToStr(ts.Time));
}
void DecodeTime(const TDateTime & DateTime, unsigned short & Hour,
unsigned short & Min, unsigned short & Sec, unsigned short & MSec)
{
uintptr_t MinCount, MSecCount;
DivMod(DateTimeToTimeStamp(DateTime).Time, 60000, MinCount, MSecCount);
uintptr_t H, M, S, MS;
DivMod(MinCount, 60, H, M);
DivMod(MSecCount, 1000, S, MS);
Hour = static_cast<unsigned short>(H);
Min = static_cast<unsigned short>(M);
Sec = static_cast<unsigned short>(S);
MSec = static_cast<unsigned short>(MS);
}
//---------------------------------------------------------------------------
static bool DecodeDateFully(const TDateTime & DateTime,
unsigned short & Year, unsigned short & Month, unsigned short & Day,
unsigned short & DOW)
{
static const int D1 = 365;
static const int D4 = D1 * 4 + 1;
static const int D100 = D4 * 25 - 1;
static const int D400 = D100 * 4 + 1;
bool Result = false;
uintptr_t T = DateTimeToTimeStamp(DateTime).Date;
if (static_cast<int>(T) <= 0)
{
Year = 0;
Month = 0;
Day = 0;
DOW = 0;
return false;
}
else
{
DOW = T % 7 + 1;
T--;
uintptr_t Y = 1;
while (T >= D400)
{
T -= D400;
Y += 400;
}
uintptr_t D = 0;
uintptr_t I = 0;
DivMod(T, D100, I, D);
if (I == 4)
{
I--;
D += D100;
}
Y += I * 100;
DivMod(D, D4, I, D);
Y += I * 4;
DivMod(D, D1, I, D);
if (I == 4)
{
I--;
D += static_cast<Word>(D1);
}
Y += I;
Result = IsLeapYear(static_cast<Word>(Y));
const TDayTable * DayTable = &MonthDays[Result];
uintptr_t M = 1;
while (true)
{
I = (*DayTable)[M - 1];
if (D < I)
{
break;
}
D -= I;
M++;
}
Year = static_cast<unsigned short>(Y);
Month = static_cast<unsigned short>(M);
Day = static_cast<unsigned short>(D + 1);
}
return Result;
}
