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merge from gcc

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This commit is contained in:
DJ Delorie
2001-05-07 16:21:15 +00:00
parent 2d4a16222b
commit e00bc6a7ba
4 changed files with 49 additions and 1 deletions
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36
libiberty/splay-tree.c
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@ -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. */