BOOL check_path_exists(char *path)
{
	const BPTR lock = Lock(path, SHARED_LOCK);
	if (lock) {
		UnLock(lock);
		return TRUE;
	}
 
	return FALSE;
}
 
BOOL checkImageDatatype(STRPTR filename)
{
	if (check_path_exists(filename))
	{
		Object *dtObj;
 
		dtObj = NewDTObject(filename,
				DTA_SourceType,		DTST_FILE,
				DTA_GroupID,		GID_PICTURE,
				TAG_DONE);
 
		if (dtObj)
		{
			DisposeDTObject (dtObj);
			return TRUE;
		}
	}
 
	return FALSE;
}

BOOL checkImageDatatype(STRPTR filename)
{
	BOOL result = FALSE;
	BPTR lock;
	struct DataType *dtn;
 
	if((lock = Lock(filename, SHARED_LOCK)))
	{
		if((dtn = ObtainDataType(DTST_FILE, (APTR) lock, TAG_END)))
		{
			const struct DataTypeHeader *dth = dtn->dtn_Header;
			printf("Description: %s\n", dth->dth_Name);
			printf("      Group: %s\n", GetDTString(dth->dth_GroupID));
 
			if (dth->dth_GroupID == GID_PICTURE)
			{
				result = TRUE;
			}
 
			ReleaseDataType(dtn);
		}
		UnLock(lock);
	}
	return result;
}