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| author | Mark Mitchell <mark@codesourcery.com> | 2001-05-07 15:45:24 +0000 |
|---|---|---|
| committer | Mark Mitchell <mmitchel@gcc.gnu.org> | 2001-05-07 15:45:24 +0000 |
| commit | 5cdba4ff5fcb672b983d5dbffba74d89b899a2ab (patch) | |
| tree | f4070967fe8b5e20c049120c92a27ab4519f2986 /libiberty | |
| parent | b73bff7e3f78151ef33441bd66e8ac3df12f0b80 (diff) | |
| download | gcc-5cdba4ff5fcb672b983d5dbffba74d89b899a2ab.tar.gz gcc-5cdba4ff5fcb672b983d5dbffba74d89b899a2ab.tar.bz2 gcc-5cdba4ff5fcb672b983d5dbffba74d89b899a2ab.zip | |
splay-tree.h (splay_tree_max): New function.
* splay-tree.h (splay_tree_max): New function.
(splay_tree_min): Likewise.
From-SVN: r41895
Diffstat (limited to 'libiberty')
| -rw-r--r-- | libiberty/ChangeLog | 5 | ||||
| -rw-r--r-- | libiberty/splay-tree.c | 36 |
2 files changed, 40 insertions, 1 deletions
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog index 53e4290dd30..9f635430edc 100644 --- a/libiberty/ChangeLog +++ b/libiberty/ChangeLog @@ -1,3 +1,8 @@ +2001-05-07 Mark Mitchell <mark@codesourcery.com> + + * splay-tree.h (splay_tree_max): New function. + (splay_tree_min): Likewise. + 2001-04-15 Daniel Berlin <dan@cgsoftware.com> * ternary.c: New file - Ternary search tree implementation. 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. */ |