Function CheckExtension

DevIL/examples/windows_example/BatchConv.cpp:134–161

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

// Simple function to test if a filename has a given extension, disregarding case
bool CheckExtension(TCHAR *Arg, TCHAR *Ext)
{
	bool	PeriodFound = false;
	TCHAR	*Argu = Arg;  // pointer to arg so we don't destroy arg
	unsigned int i;

	if (Arg == NULL || Ext == NULL || !wcslen(Arg) || !wcslen(Ext))  // if not a good filename/extension, exit early
		return false;

	Argu += wcslen(Arg);  // start at the end


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

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

	if (!_wcsicmp(Argu+1, Ext))  // extension and ext match?
		return true;

	return false;  // if all else fails, return IL_FALSE
}