Method strDup

source/SimpleHeap.cpp:27–44

UINT SimpleHeap::sBlockCount = 0;

LPTSTR SimpleHeap::strDup(LPCTSTR aBuf, size_t aLength)
// v1.0.44.14: Added aLength to improve performance in cases where callers already know the length.
// If aLength is at its default of -1, the length will be calculated here.
// Caller must ensure that aBuf isn't NULL.
{
	if (!aBuf || !*aBuf) // aBuf is checked for NULL because it's not worth avoiding it for such a low-level, frequently-called function.
		return _T(""); // Return the constant empty string to the caller (not aBuf itself since that might be volatile).
	if (aLength == -1) // Caller wanted us to calculate it.  Compare directly to -1 since aLength is unsigned.
		aLength = _tcslen(aBuf);
	LPTSTR new_buf;
	if (   !(new_buf = (LPTSTR)SimpleHeap::Malloc((aLength + 1) * sizeof(TCHAR)))   ) // +1 for the zero terminator.
		return NULL; // Callers may rely on NULL vs. "" being returned in the event of failure.
	if (aLength)
		tmemcpy(new_buf, aBuf, aLength); // memcpy() typically benchmarks slightly faster than strcpy().
	//else only a terminator is needed.
	new_buf[aLength] = '\0'; // Terminate here for when aLength==0 and for the memcpy above so that caller's aBuf doesn't have to be terminated.
	return new_buf;
}

LPTSTR SimpleHeap::Malloc(LPCTSTR aBuf, size_t aLength)
{