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avutil/tree: improve documentation for av_tree_find, av_tree_insert

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This documents the additional constness, and provides a useful libc
reference for the API specification of the comparator.

Reviewed-by: Henrik Gramner <henrik@gramner.com>
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
This commit is contained in:
Ganesh Ajjanagadde 2015-10-24 17:47:21 -04:00
parent 2ee51ef259
commit 94f333f9dc
1 changed files with 4 additions and 1 deletions
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5
libavutil/tree.h
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@ -56,6 +56,8 @@ struct AVTreeNode *av_tree_node_alloc(void);
* @param next If next is not NULL, then next[0] will contain the previous
* element and next[1] the next element. If either does not exist,
* then the corresponding entry in next is unchanged.
* @param cmp compare function used to compare elements in the tree,
* API identical to that of Standard C's qsort
* @return An element with cmp(key, elem) == 0 or NULL if no such element
* exists in the tree.
*/
@ -99,7 +101,8 @@ void *av_tree_find(const struct AVTreeNode *root, void *key,
* return av_tree_insert(rootp, key, cmp, next);
* }
* @endcode
* @param cmp compare function used to compare elements in the tree
* @param cmp compare function used to compare elements in the tree, API identical
* to that of Standard C's qsort
* @return If no insertion happened, the found element; if an insertion or
* removal happened, then either key or NULL will be returned.
* Which one it is depends on the tree state and the implementation. You