-const char *get_opt_name(char *buf, int buf_size, const char *p, char delim);
-const char *get_opt_value(char *buf, int buf_size, const char *p);
-int get_param_value(char *buf, int buf_size,
- const char *tag, const char *str);
-int check_params(char *buf, int buf_size,
- const char * const *params, const char *str);