X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=buffer_tree.c;h=fd0a59cad58c0027e3911b08eb5f0bd20a176ed5;hp=f0a7b224f9fad39fd8036d37eedbf619e3ca585b;hb=cde823b8c072f5baac17fa43a0e5608e09936d72;hpb=58864df1c0784c58e421949b67a091fd0a60e140

diff --git a/buffer_tree.c b/buffer_tree.c
index f0a7b224..fd0a59ca 100644
--- a/buffer_tree.c
+++ b/buffer_tree.c
@@ -1230,6 +1230,16 @@ void btr_get_node_start(struct btr_node *btrn, struct timeval *tv)
 	*tv = btrn->start;
 }
 
+/**
+ * Get the parent node of a buffer tree node.
+ *
+ * \param btrn The node whose parent should be returned.
+ *
+ * \a btrn must not be \p NULL.
+ *
+ * \return The parent of \a btrn, or \p NULL if \a btrn is the
+ * root node of the buffer tree.
+ */
 struct btr_node *btr_parent(struct btr_node *btrn)
 {
 	return btrn->parent;