int bbtreedel(struct btree **tree, void *item, int (*cmp)(void *, void *));
void freebtree(struct btree **tree, void (*ffunc)(void *));
int bbtreeput(struct btree **tree, void *item, int (*cmp)(void *, void *));
int bbtreedel(struct btree **tree, void *item, int (*cmp)(void *, void *));
void freebtree(struct btree **tree, void (*ffunc)(void *));
int bbtreeput(struct btree **tree, void *item, int (*cmp)(void *, void *));