tree.h
上传用户:jmzj888
上传日期:2007-01-02
资源大小:220k
文件大小:2k
- /* Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
- This file is public domain and comes with NO WARRANTY of any kind */
- #ifndef _tree_h
- #define _tree_h
- #ifdef __cplusplus
- extern "C" {
- #endif
- #define MAX_TREE_HIGHT 40 /* = max 1048576 leafs in tree */
- #define ELEMENT_KEY(tree,element)
- (tree->offset_to_key ? (void*)((byte*) element+tree->offset_to_key) :
- *((void**) (element+1)))
- #define tree_set_pointer(element,ptr) *((byte **) (element+1))=((byte*) (ptr))
- typedef enum { left_root_right, right_root_left } TREE_WALK;
- typedef uint32 element_count;
- typedef int (*tree_walk_action)(void *,element_count,void *);
- #ifdef MSDOS
- typedef struct st_tree_element {
- struct st_tree_element *left,*right;
- unsigned long count;
- uchar colour; /* black is marked as 1 */
- } TREE_ELEMENT;
- #else
- typedef struct st_tree_element {
- struct st_tree_element *left,*right;
- uint32 count:31,
- colour:1; /* black is marked as 1 */
- } TREE_ELEMENT;
- #endif /* MSDOS */
- typedef struct st_tree {
- TREE_ELEMENT *root,null_element;
- TREE_ELEMENT **parents[MAX_TREE_HIGHT];
- uint offset_to_key,elements_in_tree,size_of_element;
- qsort_cmp compare;
- void (*free)(void *);
- } TREE;
- /* Functions on hole tree */
- void init_tree(TREE *tree,int size,qsort_cmp compare,
- void (*free_element)(void*));
- void delete_tree(TREE*);
- /* Functions on leafs */
- TREE_ELEMENT *tree_insert(TREE *tree,void *key,uint key_size);
- void *tree_search(TREE *tree,void *key);
- int tree_walk(TREE *tree,tree_walk_action action,
- void *argument, TREE_WALK visit);
- int tree_delete(TREE *tree,void *key);
- #ifdef __cplusplus
- }
- #endif
- #endif