UnicodeString& UnicodeString::Replace(size_t Pos, size_t Len, const wchar_t* Data, size_t DataLen)
{
// Pos & Len must be valid
assert(Pos <= m_pData->GetLength());
assert(Len <= m_pData->GetLength());
assert(Pos + Len <= m_pData->GetLength());
// Data and *this must not intersect (but Data can be located entirely within *this)
assert(!(Data < m_pData->GetData() && Data + DataLen > m_pData->GetData()));
assert(!(Data < m_pData->GetData() + m_pData->GetLength() && Data + DataLen > m_pData->GetData() + m_pData->GetLength()));
if (!Len && !DataLen)
return *this;
size_t NewLength = m_pData->GetLength() + DataLen - Len;
if (m_pData->GetRef() == 1 && NewLength + 1 <= m_pData->GetSize())
{
if (NewLength)
{
if (Data >= m_pData->GetData() && Data + DataLen <= m_pData->GetData() + m_pData->GetLength())
{
// copy data from self
UnicodeString TmpStr(Data, DataLen);
wmemmove(m_pData->GetData() + Pos + DataLen, m_pData->GetData() + Pos + Len, m_pData->GetLength() - Pos - Len);
wmemcpy(m_pData->GetData() + Pos, TmpStr.CPtr(), TmpStr.GetLength());
}
else
{
wmemmove(m_pData->GetData() + Pos + DataLen, m_pData->GetData() + Pos + Len, m_pData->GetLength() - Pos - Len);
wmemcpy(m_pData->GetData() + Pos, Data, DataLen);
}
}
m_pData->SetLength(NewLength);
}
else
{
if (!NewLength)
{
m_pData->DecRef();
SetEUS();
return *this;
}
UnicodeStringData *NewData = new UnicodeStringData(NewLength + 1);
wmemcpy(NewData->GetData(), m_pData->GetData(), Pos);
wmemcpy(NewData->GetData() + Pos, Data, DataLen);
wmemcpy(NewData->GetData() + Pos + DataLen, m_pData->GetData() + Pos + Len, m_pData->GetLength() - Pos - Len);
NewData->SetLength(NewLength);
m_pData->DecRef();
m_pData = NewData;
}
return *this;
}
void UnicodeString::Inflate(size_t nSize)
{
if (m_pData->GetRef() == 1)
{
m_pData->Inflate(nSize);
}
else
{
UnicodeStringData *pNewData = new UnicodeStringData(nSize);
size_t nNewLength = Min(m_pData->GetLength(),nSize-1);
wmemcpy(pNewData->GetData(),m_pData->GetData(),nNewLength);
pNewData->SetLength(nNewLength);
m_pData->DecRef();
m_pData = pNewData;
}
}