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/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
**
** http://oss.sgi.com/projects/FreeB
**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
*/
/*
** Author: Eric Veach, July 1994.
**
*/
#include <stddef.h>
#include "dict-list.h"
#include "memalloc.h"
/* really __gl_dictListNewDict */
Dict *dictNewDict( void *frame,
int (*leq)(void *frame, DictKey key1, DictKey key2) )
{
Dict *dict = (Dict *) memAlloc( sizeof( Dict ));
DictNode *head;
if (dict == NULL) return NULL;
head = &dict->head;
head->key = NULL;
head->next = head;
head->prev = head;
dict->frame = frame;
dict->leq = leq;
return dict;
}
/* really __gl_dictListDeleteDict */
void dictDeleteDict( Dict *dict )
{
DictNode *node, *next;
for( node = dict->head.next; node != &dict->head; node = next ) {
next = node->next;
memFree( node );
}
memFree( dict );
}
/* really __gl_dictListInsertBefore */
DictNode *dictInsertBefore( Dict *dict, DictNode *node, DictKey key )
{
DictNode *newNode;
do {
node = node->prev;
} while( node->key != NULL && ! (*dict->leq)(dict->frame, node->key, key));
newNode = (DictNode *) memAlloc( sizeof( DictNode ));
if (newNode == NULL) return NULL;
newNode->key = key;
newNode->next = node->next;
node->next->prev = newNode;
newNode->prev = node;
node->next = newNode;
return newNode;
}
/* really __gl_dictListDelete */
void dictDelete( Dict *dict, DictNode *node ) /*ARGSUSED*/
{
node->next->prev = node->prev;
node->prev->next = node->next;
memFree( node );
}
/* really __gl_dictListSearch */
DictNode *dictSearch( Dict *dict, DictKey key )
{
DictNode *node = &dict->head;
do {
node = node->next;
} while( node->key != NULL && ! (*dict->leq)(dict->frame, key, node->key));
return node;
}
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