-char * sprint_hex(const uint8_t * data, const size_t len);
-char * sprint_bin(const uint8_t * data, const size_t len);
-char * sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks);
+void print_hex_break(const uint8_t *data, const size_t len, const uint8_t breaks);
+char *sprint_hex(const uint8_t * data, const size_t len);
+char *sprint_bin(const uint8_t * data, const size_t len);
+char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks);