struct pool;
void ss_alloc_substring (struct substring *, struct substring);
void ss_alloc_uninit (struct substring *, size_t);
+void ss_realloc (struct substring *, size_t);
void ss_alloc_substring_pool (struct substring *, struct substring,
struct pool *);
void ss_alloc_uninit_pool (struct substring *, size_t, struct pool *);