1 /* 2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) 3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice including the dates of first publication and 13 * either this permission notice or a reference to 14 * http://oss.sgi.com/projects/FreeB/ 15 * shall be included in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 * 25 * Except as contained in this notice, the name of Silicon Graphics, Inc. 26 * shall not be used in advertising or otherwise to promote the sale, use or 27 * other dealings in this Software without prior written authorization from 28 * Silicon Graphics, Inc. 29 */ 30 /* 31 ** Author: Eric Veach, July 1994. 32 ** 33 */ 34 35 //#include <stddef.h> 36 #include "dict-list.h" 37 #include "memalloc.h" 38 39 /* really __gl_dictListNewDict */ 40 Dict *dictNewDict( void *frame, 41 int (*leq)(void *frame, DictKey key1, DictKey key2) ) 42 { 43 Dict *dict = (Dict *) memAlloc( sizeof( Dict )); 44 DictNode *head; 45 46 if (dict == NULL) return NULL; 47 48 head = &dict->head; 49 50 head->key = NULL; 51 head->next = head; 52 head->prev = head; 53 54 dict->frame = frame; 55 dict->leq = leq; 56 57 return dict; 58 } 59 60 /* really __gl_dictListDeleteDict */ 61 void dictDeleteDict( Dict *dict ) 62 { 63 DictNode *node, *next; 64 65 for( node = dict->head.next; node != &dict->head; node = next ) { 66 next = node->next; 67 memFree( node ); 68 } 69 memFree( dict ); 70 } 71 72 /* really __gl_dictListInsertBefore */ 73 DictNode *dictInsertBefore( Dict *dict, DictNode *node, DictKey key ) 74 { 75 DictNode *newNode; 76 77 do { 78 node = node->prev; 79 } while( node->key != NULL && ! (*dict->leq)(dict->frame, node->key, key)); 80 81 newNode = (DictNode *) memAlloc( sizeof( DictNode )); 82 if (newNode == NULL) return NULL; 83 84 newNode->key = key; 85 newNode->next = node->next; 86 node->next->prev = newNode; 87 newNode->prev = node; 88 node->next = newNode; 89 90 return newNode; 91 } 92 93 /* really __gl_dictListDelete */ 94 void dictDelete( Dict *dict, DictNode *node ) /*ARGSUSED*/ 95 { 96 node->next->prev = node->prev; 97 node->prev->next = node->next; 98 memFree( node ); 99 } 100 101 /* really __gl_dictListSearch */ 102 DictNode *dictSearch( Dict *dict, DictKey key ) 103 { 104 DictNode *node = &dict->head; 105 106 do { 107 node = node->next; 108 } while( node->key != NULL && ! (*dict->leq)(dict->frame, key, node->key)); 109 110 return node; 111 } 112