diff options
| -rw-r--r-- | include/ChangeLog | 5 | ||||
| -rw-r--r-- | include/splay-tree.h | 4 | ||||
| -rw-r--r-- | libiberty/ChangeLog | 5 | ||||
| -rw-r--r-- | libiberty/splay-tree.c | 36 |
4 files changed, 49 insertions, 1 deletions
diff --git a/include/ChangeLog b/include/ChangeLog index 5c48a64841..24fb134d90 100644 --- a/include/ChangeLog +++ b/include/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. + 2001-04-27 Johan Rydberg <jrydberg@opencores.org> * dis-asm.h (print_insn_openrisc): Add prototype. diff --git a/include/splay-tree.h b/include/splay-tree.h index e43d4b62ea..37e9a35937 100644 --- a/include/splay-tree.h +++ b/include/splay-tree.h @@ -110,6 +110,10 @@ extern splay_tree_node splay_tree_predecessor extern splay_tree_node splay_tree_successor PARAMS((splay_tree, splay_tree_key)); +extern splay_tree_node splay_tree_max + PARAMS((splay_tree)); +extern splay_tree_node splay_tree_min + PARAMS((splay_tree)); extern int splay_tree_foreach PARAMS((splay_tree, splay_tree_foreach_fn, void*)); diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog index 8494e57373..29f8856cb2 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 52b57c088a..a712395267 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. */ |