struct btr_node;
-struct btr_node *btr_new_node(char *name, struct btr_node *parent);
-void btr_del_node(struct btr_node *btrn);
+typedef int (*btr_command_handler)(struct btr_node *btrn,
+ const char *command, char **result);
+
+enum btr_node_type {
+ BTR_NT_ROOT,
+ BTR_NT_INTERNAL,
+ BTR_NT_LEAF,
+};
+
+struct btr_node *btr_new_node(const char *name, struct btr_node *parent,
+ btr_command_handler handler, void *context);
+void btr_remove_node(struct btr_node *btrn);
+void btr_free_node(struct btr_node *btrn);
void btr_add_output(char *buf, size_t size, struct btr_node *btrn);
-bool btr_is_leaf_node(struct btr_node *btrn);
+bool btr_no_children(struct btr_node *btrn);
size_t btr_bytes_pending(struct btr_node *btrn);
size_t btr_get_input_queue_size(struct btr_node *btrn);
bool btr_no_parent(struct btr_node *btrn);
size_t btr_next_buffer(struct btr_node *btrn, char **bufp);
void btr_consume(struct btr_node *btrn, size_t numbytes);
+int btr_exec(struct btr_node *btrn, const char *command, char **value_result);
+int btr_exec_up(struct btr_node *btrn, const char *command, char **value_result);
+void btr_splice_out_node(struct btr_node *btrn);
+void btr_pushdown(struct btr_node *btrn);
+void *btr_context(struct btr_node *btrn);
+void btr_merge(struct btr_node *btrn, size_t dest_size);
+bool btr_eof(struct btr_node *btrn);
+void btr_log_tree(struct btr_node *btrn, int loglevel);
+int btr_pushdown_one(struct btr_node *btrn);
+bool btr_inplace_ok(struct btr_node *btrn);
+int btr_node_status(struct btr_node *btrn, size_t min_iqs,
+ enum btr_node_type type);