Fix some const correctness issues.

git-svn-id: http://svn.drobilla.net/zix/trunk@80 df6676b4-ccc9-40e5-b5d6-7c4628a128e3

2 files changed, 6 insertions, 6 deletions

diff --git a/zix/tree.c b/zix/tree.c
index 844adb9..9915e89 100644
--- a/zix/tree.c
+++ b/zix/tree.c
@@ -612,7 +612,7 @@ zix_tree_find(const ZixTree* t, const void* e, ZixTreeIter** ti)
 }
 
 ZIX_API void*
-zix_tree_get(ZixTreeIter* ti)
+zix_tree_get(const ZixTreeIter* ti)
 {
 	return ti ? ti->data : NULL;
 }
@@ -658,13 +658,13 @@ zix_tree_rend(ZixTree* t)
 }
 
 ZIX_API bool
-zix_tree_iter_is_end(ZixTreeIter* i)
+zix_tree_iter_is_end(const ZixTreeIter* i)
 {
 	return !i;
 }
 
 ZIX_API bool
-zix_tree_iter_is_rend(ZixTreeIter* i)
+zix_tree_iter_is_rend(const ZixTreeIter* i)
 {
 	return !i;
 }
diff --git a/zix/tree.h b/zix/tree.h
index f89d9e5..4b6e039 100644
--- a/zix/tree.h
+++ b/zix/tree.h
@@ -86,7 +86,7 @@ zix_tree_find(const ZixTree* t, const void* e, ZixTreeIter** ti);
    Return the data associated with the given tree item.
 */
 ZIX_API void*
-zix_tree_get(ZixTreeIter* ti);
+zix_tree_get(const ZixTreeIter* ti);
 
 /**
    Return an iterator to the first (smallest) element in @a t.
@@ -104,7 +104,7 @@ zix_tree_end(ZixTree* t);
    Return true iff @a i is an iterator to the end of its tree.
 */
 ZIX_API bool
-zix_tree_iter_is_end(ZixTreeIter* i);
+zix_tree_iter_is_end(const ZixTreeIter* i);
 
 /**
    Return an iterator to the last (largest) element in @a t.
@@ -122,7 +122,7 @@ zix_tree_rend(ZixTree* t);
    Return true iff @a i is an iterator to the reverse end of its tree.
 */
 ZIX_API bool
-zix_tree_iter_is_rend(ZixTreeIter* i);
+zix_tree_iter_is_rend(const ZixTreeIter* i);
 
 /**
    Return an iterator that points to the element one past @a i.