1/*
2** License Applicability. Except to the extent portions of this file are
3** made subject to an alternative license as permitted in the SGI Free
4** Software License B, Version 1.1 (the "License"), the contents of this
5** file are subject only to the provisions of the License. You may not use
6** this file except in compliance with the License. You may obtain a copy
7** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9**
10** http://oss.sgi.com/projects/FreeB
11**
12** Note that, as provided in the License, the Software is distributed on an
13** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17**
18** Original Code. The Original Code is: OpenGL Sample Implementation,
19** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21** Copyright in any portions created by third parties is as indicated
22** elsewhere herein. All Rights Reserved.
23**
24** Additional Notice Provisions: The application programming interfaces
25** established by SGI in conjunction with the Original Code are The
26** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29** Window System(R) (Version 1.3), released October 19, 1998. This software
30** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31** published by SGI, but has not been independently verified as being
32** compliant with the OpenGL(R) version 1.2.1 Specification.
33**
34*/
35/*
36** Author: Eric Veach, July 1994.
37**
38** $Date$ $Revision$
39** $Header: //depot/main/gfx/lib/glu/libtess/dict.c#5 $
40*/
41
42#include <stddef.h>
43#include "dict-list.h"
44#include "memalloc.h"
45
46/* really __gl_dictListNewDict */
47Dict *dictNewDict( void *frame,
48		   int (*leq)(void *frame, DictKey key1, DictKey key2) )
49{
50  Dict *dict = (Dict *) memAlloc( sizeof( Dict ));
51  DictNode *head;
52
53  if (dict == NULL) return NULL;
54
55  head = &dict->head;
56
57  head->key = NULL;
58  head->next = head;
59  head->prev = head;
60
61  dict->frame = frame;
62  dict->leq = leq;
63
64  return dict;
65}
66
67/* really __gl_dictListDeleteDict */
68void dictDeleteDict( Dict *dict )
69{
70  DictNode *node;
71
72  for( node = dict->head.next; node != &dict->head; node = node->next ) {
73    memFree( node );
74  }
75  memFree( dict );
76}
77
78/* really __gl_dictListInsertBefore */
79DictNode *dictInsertBefore( Dict *dict, DictNode *node, DictKey key )
80{
81  DictNode *newNode;
82
83  do {
84    node = node->prev;
85  } while( node->key != NULL && ! (*dict->leq)(dict->frame, node->key, key));
86
87  newNode = (DictNode *) memAlloc( sizeof( DictNode ));
88  if (newNode == NULL) return NULL;
89
90  newNode->key = key;
91  newNode->next = node->next;
92  node->next->prev = newNode;
93  newNode->prev = node;
94  node->next = newNode;
95
96  return newNode;
97}
98
99/* really __gl_dictListDelete */
100void dictDelete( Dict *dict, DictNode *node ) /*ARGSUSED*/
101{
102  node->next->prev = node->prev;
103  node->prev->next = node->next;
104  memFree( node );
105}
106
107/* really __gl_dictListSearch */
108DictNode *dictSearch( Dict *dict, DictKey key )
109{
110  DictNode *node = &dict->head;
111
112  do {
113    node = node->next;
114  } while( node->key != NULL && ! (*dict->leq)(dict->frame, key, node->key));
115
116  return node;
117}
118