NAME

cp_splaytree_create, cp_splaytree_create_by_option, cp_splaytree_destroy, cp_splaytree_destroy_custom - splay tree constructor / destructor functions

SYNOPSIS

#include <cprops/splay.h>

cp_splaytree *cp_splaytree_create(cp_compare_fn cmp);
cp_splaytree * cp_splaytree_create_by_option(int mode, cp_compare_fn compare_fn, cp_copy_fn copy_key, cp_destructor_fn free_key); cp_copy_fn copy_value cp_destructor_fn free_value);

void cp_splaytree_destroy(cp_splaytree *tree);
void cp_splaytree_destroy_custom(cp_splaytree *tree, cp_destructor_fn dk, cp_destructor_fn dv);

DESCRIPTION

cp_splaytree_create allocates and initializes an splay tree object with the given compare function. The compare function should follow this prototype:

  int cmp(void *a, void *b);

and return 0 for matching keys, > 0 if a > b and < 0 if a < b (strcmp semantics). The created tree is not synchronized (COLLECTION_MODE_NOSYNC mode bit is set).

cp_splaytree_create_by_option allows specifying an initial operation mode. Note that unless COLLECTION_MODE_NOSYNC is set on the mode parameter, tree operations are synchronized. The copy_key and copy_value functions are used on insertion if COLLECTION_MODE_COPY is set. If COLLECTION_MODE_COPY is set and either of these is NULL, inserted keys and / or values are inserted directly rather than copies.
The free_key and free_value functions are used on item removal or tree destruction if COLLECTION_MODE_DEEP is set. If COLLECTION_MODE_DEEP is set and either of these is NULL, no cleanup is performed on keys and / or values. This makes it possible to apply the copy/ deep mechanism to keys or values only.

cp_splaytree_destroy recursively deallocates the tree structure using the current mode settings. cp_splaytree_destroy_custom sets the COLLECTION_MODE_DEEP mode bit and destroys the tree using the given key and value destructor functions. Specifying a NULL destructor function or functions precludes key deallocation, value deallocation or both.

RETURN VALUE

cp_splaytree_create and cp_splaytree_create_by_option return a newly allocated cp_splaytree object on success or NULL on failure.