1000 dnode_t *dnode_init(dnode_t *dnode, void *data)  in dnode_init()  argument
1002     dnode->data = data;  in dnode_init()
1003     dnode->parent = NULL;  in dnode_init()
1004     dnode->left = NULL;  in dnode_init()
1005     dnode->right = NULL;  in dnode_init()
1006     return dnode;  in dnode_init()
1009 void dnode_destroy(dnode_t *dnode)  in dnode_destroy()  argument
1011     dict_assert (!dnode_is_in_a_dict(dnode));  in dnode_destroy()
1012     free(dnode);  in dnode_destroy()
1015 void *dnode_get(dnode_t *dnode)  in dnode_get()  argument
1017     return dnode->data;  in dnode_get()
1020 const void *dnode_getkey(dnode_t *dnode)  in dnode_getkey()  argument
1022     return dnode->key;  in dnode_getkey()
1026 void dnode_put(dnode_t *dnode, void *data)  in dnode_put()  argument
1028     dnode->data = data;  in dnode_put()
1033 int dnode_is_in_a_dict(dnode_t *dnode)  in dnode_is_in_a_dict()  argument
1035     return (dnode->parent && dnode->left && dnode->right);  in dnode_is_in_a_dict()