88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
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/*
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* Copyright (c) 2001-2002, David Janssens
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __TGT_H
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#define __TGT_H
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typedef struct tgt_node {
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struct tgt_node *parent;
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int value;
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int low;
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int known;
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} tgt_node_t;
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typedef struct {
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int numleafsh;
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int numleafsv;
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int numnodes;
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tgt_node_t *nodes;
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} tgt_tree_t;
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/*
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* Reset a tag-tree (set all leaves to 0)
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* tree: tag-tree to reset
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*/
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void tgt_reset(tgt_tree_t * tree);
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/*
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* Create a tag-tree
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* numleafsh: width of the array of leafs of the tree
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* numleafsv: height of the array of leafs of the tree
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*/
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tgt_tree_t *tgt_create(int numleafsh, int numleafsv);
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/*
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* Destroy a tag-tree, liberating memory
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* tree: tag-tree to destroy
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*/
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void tgt_destroy(tgt_tree_t * tree);
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/*
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* Set the value of a leaf of a tag-tree
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* tree: tag-tree to modify
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* leafno: number that identifies the leaf to modify
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* value: new value of the leaf
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*/
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void tgt_setvalue(tgt_tree_t * tree, int leafno, int value);
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/*
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* Encode the value of a leaf of the tag-tree up to a given threshold
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* leafno: number that identifies the leaf to encode
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* threshold: threshold to use when encoding value of the leaf
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*/
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void tgt_encode(tgt_tree_t * tree, int leafno, int threshold);
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/*
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* Decode the value of a leaf of the tag-tree up to a given threshold
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* leafno: number that identifies the leaf to decode
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* threshold: threshold to use when decoding value of the leaf
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*/
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int tgt_decode(tgt_tree_t * tree, int leafno, int threshold);
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#endif
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