mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/* Et-forest data structure implementation.
|
|
Copyright (C) 2002 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/* This package implements ET forest data structure. Each tree in
|
|
the structure maintains a tree structure and offers logarithmic time
|
|
for tree operations (insertion and removal of nodes and edges) and
|
|
poly-logarithmic time for nearest common ancesto.
|
|
|
|
ET tree strores its structue as a sequence of symbols obtained
|
|
by dfs(root)
|
|
|
|
dfs (node)
|
|
{
|
|
s = node;
|
|
for each child c of node do
|
|
s = concat (s, c, node);
|
|
return s;
|
|
}
|
|
|
|
For example for tree
|
|
|
|
1
|
|
/ | \
|
|
2 3 4
|
|
/ |
|
|
4 5
|
|
|
|
the sequence is 1 2 4 2 5 3 1 3 1 4 1.
|
|
|
|
The sequence is stored in a sligtly modified splay tree.
|
|
In order to support various types of node values, a hashtable
|
|
is used to convert node values to the internal representation. */
|
|
|
|
#ifndef _ET_TREE_H
|
|
#define _ET_TREE_H
|
|
|
|
#include <ansidecl.h>
|
|
#include <stddef.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
typedef struct et_forest *et_forest_t;
|
|
typedef struct et_forest_node *et_forest_node_t;
|
|
|
|
extern et_forest_t et_forest_create PARAMS ((void));
|
|
|
|
extern void et_forest_delete PARAMS ((et_forest_t));
|
|
|
|
extern et_forest_node_t et_forest_add_node PARAMS ((et_forest_t, void *));
|
|
extern int et_forest_add_edge PARAMS ((et_forest_t, et_forest_node_t,
|
|
et_forest_node_t));
|
|
extern void et_forest_remove_node PARAMS ((et_forest_t, et_forest_node_t));
|
|
extern int et_forest_remove_edge PARAMS ((et_forest_t, et_forest_node_t,
|
|
et_forest_node_t));
|
|
extern et_forest_node_t et_forest_parent PARAMS ((et_forest_t, et_forest_node_t));
|
|
extern et_forest_node_t et_forest_common_ancestor PARAMS ((et_forest_t,
|
|
et_forest_node_t,
|
|
et_forest_node_t));
|
|
extern void * et_forest_node_value PARAMS ((et_forest_t, et_forest_node_t));
|
|
extern int et_forest_enumerate_sons PARAMS ((et_forest_t, et_forest_node_t,
|
|
et_forest_node_t *));
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* _ET_TREE_H */
|