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- /*
- * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
- #ifndef TREE_H
- #define TREE_H
-
- struct AVTreeNode;
-
- /**
- * Finds an element.
- * @param root a pointer to the root node of the tree
- * @param next if next is not NULL then next[0] will contain the previous element and
- * next[1] the next element if either doesnt exist then the corresponding
- * entry in next is unchanged
- * @return an element with cmp(key, elem)==0 or NULL if no such element exists in
- * the tree
- */
- void *av_tree_find(const struct AVTreeNode *root, void *key, int (*cmp)(void *key, const void *b), void *next[2]);
-
- /**
- * Finds a element for which cmp(key, elem)==0, if no such element is found key
- * is inserted into the tree.
- * @param rootp a pointer to a pointer to the root node of the tree note the
- * root node can change during insertions, this is required to
- * keep the tree balanced
- *
- * @return if no insertion happened, the found element
- * if a insertion happened, then either key or NULL is returned (which it is
- * depends on the tree state and the implemenattion, you should make no
- * asumtations that its one or the other in code)
- */
- void *av_tree_insert(struct AVTreeNode **rootp, void *key, int (*cmp)(void *key, const void *b));
- void av_tree_destroy(struct AVTreeNode *t);
-
- #endif /* TREE_H */
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