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52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* ternary.h - Ternary Search Trees
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Copyright 2001 Free Software Foundation, Inc.
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Contributed by Daniel Berlin (dan@cgsoftware.com)
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
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USA. */
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#ifndef TERNARY_H_
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#define TERNARY_H_
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/* Ternary search trees */
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typedef struct ternary_node_def *ternary_tree;
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typedef struct ternary_node_def
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{
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char splitchar;
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ternary_tree lokid;
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ternary_tree eqkid;
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ternary_tree hikid;
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}
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ternary_node;
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/* Insert string S into tree P, associating it with DATA.
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Return the data in the tree associated with the string if it's
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already there, and replace is 0.
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Otherwise, replaces if it it exists, inserts if it doesn't, and
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returns the data you passed in. */
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void *ternary_insert (ternary_tree *p, const char *s,
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void *data, int replace);
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/* Delete the ternary search tree rooted at P.
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Does NOT delete the data you associated with the strings. */
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void ternary_cleanup (ternary_tree p);
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/* Search the ternary tree for string S, returning the data associated
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with it if found. */
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void *ternary_search (const ternary_node *p, const char *s);
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#endif
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