diff options
Diffstat (limited to 'libiberty/splay-tree.c')
| -rw-r--r-- | libiberty/splay-tree.c | 36 |
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. */ |