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 */
dictNewDict(void * frame,int (* leq)(void * frame,DictKey key1,DictKey key2))47 Dict *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 */
dictDeleteDict(Dict * dict)68 void 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 */
dictInsertBefore(Dict * dict,DictNode * node,DictKey key)79 DictNode *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 */
dictDelete(Dict * dict,DictNode * node)100 void 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 */
dictSearch(Dict * dict,DictKey key)108 DictNode *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