| 1 | /* ternary.h - Ternary Search Trees
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| 2 | Copyright 2001 Free Software Foundation, Inc.
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| 3 |
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| 4 | Contributed by Daniel Berlin (dan@cgsoftware.com)
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| 5 |
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| 6 |
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| 7 | This program is free software; you can redistribute it and/or modify it
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| 8 | under the terms of the GNU General Public License as published by the
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| 9 | Free Software Foundation; either version 2, or (at your option) any
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| 10 | later version.
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| 11 |
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| 12 | This program is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with this program; if not, write to the Free Software
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| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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| 20 | USA. */
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| 21 | #ifndef TERNARY_H_
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| 22 | #define TERNARY_H_
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| 23 | /* Ternary search trees */
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| 24 |
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| 25 | typedef struct ternary_node_def *ternary_tree;
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| 26 |
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| 27 | typedef struct ternary_node_def
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| 28 | {
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| 29 | char splitchar;
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| 30 | ternary_tree lokid;
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| 31 | ternary_tree eqkid;
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| 32 | ternary_tree hikid;
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| 33 | }
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| 34 | ternary_node;
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| 35 |
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| 36 | /* Insert string S into tree P, associating it with DATA.
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| 37 | Return the data in the tree associated with the string if it's
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| 38 | already there, and replace is 0.
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| 39 | Otherwise, replaces if it it exists, inserts if it doesn't, and
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| 40 | returns the data you passed in. */
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| 41 | PTR ternary_insert PARAMS ((ternary_tree *p, const char *s,
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| 42 | PTR data, int replace));
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| 43 |
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| 44 | /* Delete the ternary search tree rooted at P.
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| 45 | Does NOT delete the data you associated with the strings. */
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| 46 | void ternary_cleanup PARAMS ((ternary_tree p));
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| 47 |
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| 48 | /* Search the ternary tree for string S, returning the data associated
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| 49 | with it if found. */
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| 50 | PTR ternary_search PARAMS ((const ternary_node *p, const char *s));
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| 51 | #endif
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