* splay-tree.h (splay_tree_max): New function.

	(splay_tree_min): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@41895 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 35 insertions, 1 deletions

diff --git a/libiberty/splay-tree.c b/libiberty/splay-tree.c
index 52b57c088a7..a7123952671 100644
--- a/libiberty/splay-tree.c
+++ b/libiberty/splay-tree.c
@@ -1,5 +1,5 @@
 /* A splay-tree datatype.  
-   Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
    Contributed by Mark Mitchell (mark@markmitchell.com).
 
 This file is part of GNU CC.
@@ -368,6 +368,40 @@ splay_tree_lookup (sp, key)
     return 0;
 }
 
+/* Return the node in SP with the greatest key.  */
+
+splay_tree_node
+splay_tree_max (sp)
+     splay_tree sp;
+{
+  splay_tree_node n = sp->root;
+
+  if (!n)
+    return NULL;
+
+  while (n->right)
+    n = n->right;
+
+  return n;
+}
+
+/* Return the node in SP with the smallest key.  */
+
+splay_tree_node
+splay_tree_min (sp)
+     splay_tree sp;
+{
+  splay_tree_node n = sp->root;
+
+  if (!n)
+    return NULL;
+
+  while (n->left)
+    n = n->left;
+
+  return n;
+}
+
 /* Return the immediate predecessor KEY, or NULL if there is no
    predecessor.  KEY need not be present in the tree.  */