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/*
a talloc based red-black tree
Copyright (C) Ronnie Sahlberg 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _RB_TREE_H
#define _RB_TREE_H
#define TRBT_RED 0x00
#define TRBT_BLACK 0x01
typedef struct trbt_node {
struct trbt_tree *tree;
struct trbt_node *parent;
struct trbt_node *left;
struct trbt_node *right;
uint32_t rb_color;
uint32_t key32;
void *data;
} trbt_node_t;
typedef struct trbt_tree {
trbt_node_t *root;
/* automatically free the tree when the last node has been deleted */
#define TRBT_AUTOFREE 0x00000001
uint32_t flags;
} trbt_tree_t;
/* Create a RB tree */
trbt_tree_t *trbt_create(TALLOC_CTX *memctx, uint32_t flags);
/* Lookup a node in the tree and return a pointer to data or NULL */
void *trbt_lookup32(trbt_tree_t *tree, uint32_t key);
/* Insert a new node into the tree. If there was already a node with this
key the pointer to the previous data is returned.
The tree will talloc_steal() the data inserted into the tree .
*/
void *trbt_insert32(trbt_tree_t *tree, uint32_t key, void *data);
/* Insert a new node into the tree.
If this is a new node:
callback is called with data==NULL and param=param
the returned value from the callback is talloc_stolen and inserted in the
tree.
If a node already exists for this key then:
callback is called with data==existing data and param=param
the returned value is talloc_stolen and inserted in the tree
*/
void trbt_insert32_callback(trbt_tree_t *tree, uint32_t key, void *(*callback)(void *param, void *data), void *param);
/* Delete a node from the tree and free all data associated with it */
void trbt_delete32(trbt_tree_t *tree, uint32_t key);
/* insert into the tree with a key based on an array of uint32 */
void trbt_insertarray32_callback(trbt_tree_t *tree, uint32_t keylen, uint32_t *key, void *(*callback)(void *param, void *data), void *param);
/* Lookup a node in the tree with a key based on an array of uint32
and return a pointer to data or NULL */
void *trbt_lookuparray32(trbt_tree_t *tree, uint32_t keylen, uint32_t *key);
/* Traverse a tree with a key based on an array of uint32
returns 0 if traverse completed
!0 if the traverse was aborted
If the callback returns !0 the traverse will be aborted
*/
int trbt_traversearray32(trbt_tree_t *tree, uint32_t keylen, int (*callback)(void *param, void *data), void *param);
/* Lookup the first node in the tree with a key based on an array of uint32
and return a pointer to data or NULL */
void *trbt_findfirstarray32(trbt_tree_t *tree, uint32_t keylen);
#endif /* _RB_TREE_H */
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