| 1 | /*
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| 2 | * zAVLTree.h: Header file for zAVLTrees.
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| 3 | * Copyright (C) 1998,2001 Michael H. Buselli
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| 4 | * This is version 0.1.3 (alpha).
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| 5 | * Generated from $Id: xAVLTree.h.sh,v 1.5 2001/06/07 06:58:28 cosine Exp $
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| 6 | *
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| 7 | * This library is free software; you can redistribute it and/or
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| 8 | * modify it under the terms of the GNU Library General Public
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| 9 | * License as published by the Free Software Foundation; either
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| 10 | * version 2 of the License, or (at your option) any later version.
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| 11 | *
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| 12 | * This library 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 GNU
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| 15 | * Library 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 Library General Public
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| 18 | * License along with this library; if not, write to the Free
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| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 20 | *
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| 21 | * The author of this library can be reached at the following address:
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| 22 | * Michael H. Buselli
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| 23 | * 30051 N. Waukegan Rd. Apt. 103
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| 24 | * Lake Bluff, IL 60044-5412
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| 25 | *
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| 26 | * Or you can send email to <cosine@cosine.org>.
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| 27 | * The official web page for this product is:
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| 28 | * http://www.cosine.org/project/AVLTree/
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| 29 | */
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| 30 |
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| 31 | #ifndef _ZAVLTREE_H_
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| 32 | #define _ZAVLTREE_H_
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| 33 |
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| 34 | /* typedef the keytype */
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| 35 | typedef const char * zAVLKey;
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| 36 |
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| 37 | /* Comparison function for strings is strcmp(). */
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| 38 | #define zAVLKey_cmp(tree, a, b) (strcmp((a), (b)))
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| 39 |
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| 40 |
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| 41 | typedef struct _zAVLNode {
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| 42 | zAVLKey key;
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| 43 | long depth;
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| 44 | void *item;
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| 45 | struct _zAVLNode *parent;
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| 46 | struct _zAVLNode *left;
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| 47 | struct _zAVLNode *right;
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| 48 | } zAVLNode;
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| 49 |
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| 50 |
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| 51 | typedef struct {
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| 52 | zAVLNode *top;
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| 53 | long count;
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| 54 | zAVLKey (*getkey)(const void *item);
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| 55 | } zAVLTree;
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| 56 |
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| 57 |
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| 58 | typedef struct {
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| 59 | const zAVLTree *avltree;
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| 60 | const zAVLNode *curnode;
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| 61 | } zAVLCursor;
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| 62 |
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| 63 |
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| 64 | extern zAVLTree *zAVLAllocTree (zAVLKey (*getkey)(void const *item));
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| 65 | extern void zAVLFreeTree (zAVLTree *avltree, void (freeitem)(void *item));
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| 66 | extern int zAVLInsert (zAVLTree *avltree, void *item);
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| 67 | extern void *zAVLSearch (zAVLTree const *avltree, zAVLKey key);
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| 68 | extern int zAVLDelete (zAVLTree *avltree, zAVLKey key);
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| 69 | extern void *zAVLFirst (zAVLCursor *avlcursor, zAVLTree const *avltree);
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| 70 | extern void *zAVLNext (zAVLCursor *avlcursor);
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| 71 |
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| 72 | #endif
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