bool ss_match_byte (struct substring *, char);
int ss_match_byte_in (struct substring *, struct substring);
bool ss_match_string (struct substring *, const struct substring);
bool ss_match_byte (struct substring *, char);
int ss_match_byte_in (struct substring *, struct substring);
bool ss_match_string (struct substring *, const struct substring);
int ss_get_byte (struct substring *);
size_t ss_get_bytes (struct substring *, size_t n, struct substring *);
bool ss_get_until (struct substring *, char delimiter, struct substring *);
int ss_get_byte (struct substring *);
size_t ss_get_bytes (struct substring *, size_t n, struct substring *);
bool ss_get_until (struct substring *, char delimiter, struct substring *);