char *buf_find_reverse (const char *, size_t, const char *, size_t);
int buf_compare_case (const char *, const char *, size_t);
int buf_compare_rpad (const char *, size_t, const char *, size_t);
-void buf_copy_lpad (char *, size_t, const char *, size_t);
-void buf_copy_rpad (char *, size_t, const char *, size_t);
-void buf_copy_str_lpad (char *, size_t, const char *);
-void buf_copy_str_rpad (char *, size_t, const char *);
+void buf_copy_lpad (char *, size_t, const char *, size_t, char pad);
+void buf_copy_rpad (char *, size_t, const char *, size_t, char pad);
+void buf_copy_str_lpad (char *, size_t, const char *, char pad);
+void buf_copy_str_rpad (char *, size_t, const char *, char pad);
int str_compare_rpad (const char *, const char *);
void str_copy_rpad (char *, size_t, const char *);
size_t *save_idx, struct substring *token);
void ds_rpad (struct string *, size_t length, char pad);
void ds_set_length (struct string *, size_t new_length, char pad);
+void ds_remove (struct string *, size_t start, size_t n);
/* Extracting substrings. */
struct substring ds_ss (const struct string *);