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75 lines
2.0 KiB
75 lines
2.0 KiB
/* BEGIN_LEGAL
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Copyright (c) 2021 Intel Corporation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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END_LEGAL */
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#if !defined(_AVL_TREE_H_)
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# define _AVL_TREE_H_
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#include <stdint.h>
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#if defined(AVL_KEY_32_BIT)
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typedef uint32_t avl_key_t;
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#else
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typedef uint64_t avl_key_t;
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#endif
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struct avl_node_s; // fwd decl
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typedef struct {
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struct avl_node_s* top;
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} avl_tree_t;
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void avl_tree_init(avl_tree_t* tree);
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// clear removes the tree nodes, not the data
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void avl_tree_clear(avl_tree_t* tree, int free_data);
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void* avl_find(avl_tree_t* tree, avl_key_t key);
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// find the node with a key <= the given key. Returns found key value in
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// lbkey and the data payoad as a return value.
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void* avl_find_lower_bound(avl_tree_t* tree, avl_key_t key,
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avl_key_t* lbkey); // output
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// insert notices key collisions and will free the associated data if
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// free_data is nonzero.
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void avl_insert(avl_tree_t* tree, avl_key_t key, void* value, int free_data);
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#if 0 // DELETE not done yet.
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// return 1 on failure, 0 on success
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int avl_delete(avl_tree_t* tree, avl_key_t key, int free_data);
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#endif
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struct avl_link_node_s; // fwd decl
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typedef struct avl_iter_s {
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struct avl_link_node_s* head;
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struct avl_link_node_s* tail;
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} avl_iter_t;
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void avl_iter_begin( avl_iter_t* iter,avl_tree_t* tree);
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void* avl_iter_current(avl_iter_t* iter);
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void avl_iter_increment(avl_iter_t* iter);
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int avl_iter_done(avl_iter_t* iter);
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void avl_iter_cleanup(avl_iter_t* iter); // call if end iteration early
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#endif
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