-static void bool_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void num_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void str_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void quad_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void sort_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void rx_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void magic_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void addr_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void user_to_string (char* dst, size_t dstlen, struct option_t* option);
-static void sys_to_string (char* dst, size_t dstlen, struct option_t* option);
+static void bool_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void num_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void str_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void quad_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void sort_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void rx_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void magic_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void addr_to_string (char* dst, ssize_t dstlen, struct option_t* option);
+static void sys_to_string (char* dst, ssize_t dstlen, struct option_t* option);