dict.h

/*
 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice including the dates of first publication and
 * either this permission notice or a reference to
 * http://oss.sgi.com/projects/FreeB/
 * shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of Silicon Graphics, Inc.
 * shall not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization from
 * Silicon Graphics, Inc.
 */
/*
** Author: Eric Veach, July 1994.
**
*/

#ifndef __dict_list_h_
#define __dict_list_h_

/* Use #define's so that another heap implementation can use this one */

#define DictKey  DictListKey
#define Dict     DictList
#define DictNode DictListNode

#define dictNewDict(frame, leq)           __gl_dictListNewDict(frame, leq)
#define dictDeleteDict(dict)              __gl_dictListDeleteDict(dict)

#define dictSearch(dict, key)             __gl_dictListSearch(dict, key)
#define dictInsert(dict, key)             __gl_dictListInsert(dict, key)
#define dictInsertBefore(dict, node, key) __gl_dictListInsertBefore(dict, node, key)
#define dictDelete(dict, node)            __gl_dictListDelete(dict, node)

#define dictKey(n)                        __gl_dictListKey(n)
#define dictSucc(n)                       __gl_dictListSucc(n)
#define dictPred(n)                       __gl_dictListPred(n)
#define dictMin(d)                        __gl_dictListMin(d)
#define dictMax(d)                        __gl_dictListMax(d)

typedef void* DictKey;
typedef struct Dict Dict;
typedef struct DictNode DictNode;

Dict* dictNewDict(void* frame, int (*leq)(void* frame, DictKey key1, DictKey key2));
void dictDeleteDict(Dict* dict);

/* Search returns the node with the smallest key greater than or equal
 * to the given key.  If there is no such key, returns a node whose
 * key is NULL.  Similarly, Succ(Max(d)) has a NULL key, etc.
 */
DictNode* dictSearch(Dict* dict, DictKey key);
DictNode* dictInsertBefore(Dict* dict, DictNode* node, DictKey key);
void      dictDelete(Dict* dict, DictNode* node);

#define __gl_dictListKey(n)      ((n)->key)
#define __gl_dictListSucc(n)     ((n)->next)
#define __gl_dictListPred(n)     ((n)->prev)
#define __gl_dictListMin(d)      ((d)->head.next)
#define __gl_dictListMax(d)      ((d)->head.prev)
#define __gl_dictListInsert(d,k) (dictInsertBefore((d),&(d)->head,(k)))

/*** Private data structures ***/

struct DictNode
{
   DictKey   key;
   DictNode* next;
   DictNode* prev;
};

struct Dict
{
   DictNode head;
   void*    frame;
   int      (*leq)(void* frame, DictKey key1, DictKey key2);
};

#endif /* __dict_list_h_ */