Function GetExtension

DevIL/examples/windows_example/BatchConv.cpp:107–130

TCHAR *GetExtension(const TCHAR *FileName)
{
	bool PeriodFound = false;
	TCHAR *Ext = (TCHAR*)FileName;
	long i, Len = (long)wcslen(FileName);

	if (FileName == NULL || !Len)  // if not a good filename/extension, exit early
		return NULL;

	Ext += Len;  // start at the end

	for (i = Len; i >= 0; i--) {
		if (*Ext == '.') {  // try to find a period 
			PeriodFound = true;
			break;
		}
		Ext--;
	}

	if (!PeriodFound)  // if no period, no extension
		return NULL;

	return Ext+1;
}


// Simple function to test if a filename has a given extension, disregarding case