51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
|
/* ternary.h - Ternary Search Trees
|
||
|
|
Copyright 2001 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Contributed by Daniel Berlin (dan@cgsoftware.com)
|
||
|
|
|
||
|
|
|
||
|
|
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, 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. */
|
||
|
|
#ifndef TERNARY_H_
|
||
|
|
#define TERNARY_H_
|
||
|
|
/* Ternary search trees */
|
||
|
|
|
||
|
|
typedef struct ternary_node_def *ternary_tree;
|
||
|
|
|
||
|
|
typedef struct ternary_node_def
|
||
|
|
{
|
||
|
|
char splitchar;
|
||
|
|
ternary_tree lokid;
|
||
|
|
ternary_tree eqkid;
|
||
|
|
ternary_tree hikid;
|
||
|
|
}
|
||
|
|
ternary_node;
|
||
|
|
|
||
|
|
/* Insert string S into tree P, associating it with DATA.
|
||
|
|
Return the data in the tree associated with the string if it's
|
||
|
|
already there, and replace is 0.
|
||
|
|
Otherwise, replaces if it it exists, inserts if it doesn't, and
|
||
|
|
returns the data you passed in. */
|
||
|
|
void *ternary_insert (ternary_tree *p, char *s, void *data, int replace);
|
||
|
|
|
||
|
|
/* Delete the ternary search tree rooted at P.
|
||
|
|
Does NOT delete the data you associated with the strings. */
|
||
|
|
void ternary_cleanup (ternary_tree p);
|
||
|
|
|
||
|
|
/* Search the ternary tree for string S, returning the data associated
|
||
|
|
with it if found. */
|
||
|
|
void *ternary_search (ternary_tree p, char *s);
|
||
|
|
#endif
|