string & FileSizeToStr(string &strDestStr, unsigned __int64 Size, int Width, unsigned __int64 ViewFlags)
{
FormatString strStr;
unsigned __int64 Divider;
size_t IndexDiv, IndexB;
// подготовительные мероприятия
if (!UnitStr[0][0][0])
{
PrepareUnitStr();
}
bool Commas=(ViewFlags & COLUMN_COMMAS)!=0;
bool FloatSize=(ViewFlags & COLUMN_FLOATSIZE)!=0;
bool Economic=(ViewFlags & COLUMN_ECONOMIC)!=0;
bool UseMinSizeIndex=(ViewFlags & COLUMN_MINSIZEINDEX)!=0;
size_t MinSizeIndex=(ViewFlags & COLUMN_MINSIZEINDEX_MASK)+1;
bool ShowBytesIndex=(ViewFlags & COLUMN_SHOWBYTESINDEX)!=0;
if (ViewFlags & COLUMN_THOUSAND)
{
Divider=1000;
IndexDiv=0;
}
else
{
Divider=1024;
IndexDiv=1;
}
unsigned __int64 Sz = Size, Divider2 = Divider/2, Divider64 = Divider, OldSize;
if (FloatSize)
{
unsigned __int64 Divider64F = 1, Divider64F_mul = 1000, Divider64F2 = 1, Divider64F2_mul = Divider;
//выравнивание идёт по 1000 но само деление происходит на Divider
//например 999 bytes покажутся как 999 а вот 1000 bytes уже покажутся как 0.97 K
for (IndexB=0; IndexB<UNIT_COUNT-1; IndexB++)
{
if (Sz < Divider64F*Divider64F_mul)
break;
Divider64F = Divider64F*Divider64F_mul;
Divider64F2 = Divider64F2*Divider64F2_mul;
}
if (!IndexB)
{
strStr << Sz;
}
else
{
Sz = (OldSize=Sz) / Divider64F2;
OldSize = (OldSize % Divider64F2) / (Divider64F2 / Divider64F2_mul);
DWORD Decimal = (DWORD)(0.5+(double)(DWORD)OldSize/(double)Divider*100.0);
if (Decimal >= 100)
{
Decimal -= 100;
Sz++;
}
strStr << Sz << L"." << fmt::MinWidth(2) << fmt::FillChar(L'0') << Decimal;
FormatNumber(strStr,strStr,2);
}
if (IndexB>0 || ShowBytesIndex)
{
Width-=(Economic?1:2);
if (Width<0)
Width=0;
if (Economic)
strDestStr.Format(L"%*.*s%1.1s",Width,Width,strStr.CPtr(),UnitStr[IndexB][IndexDiv]);
else
strDestStr.Format(L"%*.*s %1.1s",Width,Width,strStr.CPtr(),UnitStr[IndexB][IndexDiv]);
}
else
strDestStr.Format(L"%*.*s",Width,Width,strStr.CPtr());
return strDestStr;
}
if (Commas)
InsertCommas(Sz,strStr);
else
strStr << Sz;
if ((!UseMinSizeIndex && strStr.GetLength()<=static_cast<size_t>(Width)) || Width<5)
{
if (ShowBytesIndex)
{
Width-=(Economic?1:2);
if (Width<0)
Width=0;
if (Economic)
strDestStr.Format(L"%*.*s%1.1s",Width,Width,strStr.CPtr(),UnitStr[0][IndexDiv]);
else
strDestStr.Format(L"%*.*s %1.1s",Width,Width,strStr.CPtr(),UnitStr[0][IndexDiv]);
}
else
strDestStr.Format(L"%*.*s",Width,Width,strStr.CPtr());
}
else
{
Width-=(Economic?1:2);
IndexB=0;
do
{
//Sz=(Sz+Divider2)/Divider64;
Sz = (OldSize=Sz) / Divider64;
if ((OldSize % Divider64) > Divider2)
++Sz;
IndexB++;
if (Commas)
{
InsertCommas(Sz,strStr);
}
else
{
strStr.Clear();
strStr << Sz;
}
}
while ((UseMinSizeIndex && IndexB<MinSizeIndex) || strStr.GetLength() > static_cast<size_t>(Width));
if (Economic)
strDestStr.Format(L"%*.*s%1.1s",Width,Width,strStr.CPtr(),UnitStr[IndexB][IndexDiv]);
else
strDestStr.Format(L"%*.*s %1.1s",Width,Width,strStr.CPtr(),UnitStr[IndexB][IndexDiv]);
}
return strDestStr;
}
