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#ifndef BTREE_H
#define BTREE_H
#include <stddef.h>
#define BTREE_DEGREE_DEFAULT 4
#define BTREE_SIZE_MIN 8
#define BTREE_SIZE_MAX 4096
#define BTREE_CMP_LT ( -1 )
#define BTREE_CMP_EQ ( 0 )
#define BTREE_CMP_GT ( 1 )
struct btree;
/* elem_size: the size of the elements, typically `sizeof(struct <your struct>)`
* t: degree of the btree, if you're in doubt, use `BTREE_SIZE_DEFAULT`
* cmp: comparison function, in order to support any operations on the tree.
*
* This function just calls `btree_new_with_allocator` with `free` and `malloc`
* as initializers.
*/
struct btree *btree_new(size_t elem_size,
size_t t,
int(*cmp)(const void *a, const void *b));
/* Same as `btree_new`, except that it actually initializes a btree, but with
* the given allocators.
*/
struct btree *btree_new_with_allocator(size_t elem_size,
size_t t,
int(*cmp)(const void *a, const void *b),
void *(*alloc)(size_t),
void (*dealloc)(void*));
void btree_free(struct btree *btree);
void *btree_search(struct btree *btree, void *elem);
void *btree_insert(struct btree *btree, void *elem);
void *btree_delete(struct btree *btree, void *elem);
#endif
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