cbor_encode_break
_CBOR_NODISCARD CBOR_EXPORT size_t cbor_encode_break(unsigned char *, size_t);
cbor_encode_break(buffer + written, buffer_size - written);
cbor_encode_break(buffer + written, buffer_size - written);
cbor_encode_break(buffer + written, buffer_size - written);
cbor_encode_break(buffer + written, buffer_size - written);