This data type encapsulate a standard C char array. Its recommended to use this type if you need variables holding text. Its caches the length of the C string to avoid repetive calls to strlen, thus improving performance. Its also safer to explicitly give the length to string operations of the core or C libraries to prevent problems because of buffer overflows and missing null-termination. Important: The char array inside this type is not null-terminated. So if you need to work with external functions that rely on this termination you must add a zero at the end by yourself. Keep in mind that the length of the char array is normally not large enough to store this additional null-termination. So you must copy the char array to a new buffer that is (len + 1) big, otherwise memory corruption and undefinied behavour will occur. Most libraries provides also functions that can work with an explicit given length, thus avoiding the need for this copy operation.
