/gecko_api/include/jar-ds.h

  1/* ***** BEGIN LICENSE BLOCK *****
  2 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  3 *
  4 * The contents of this file are subject to the Mozilla Public License Version
  5 * 1.1 (the "License"); you may not use this file except in compliance with
  6 * the License. You may obtain a copy of the License at
  7 * http://www.mozilla.org/MPL/
  8 *
  9 * Software distributed under the License is distributed on an "AS IS" basis,
 10 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 11 * for the specific language governing rights and limitations under the
 12 * License.
 13 *
 14 * The Original Code is the Netscape security libraries.
 15 *
 16 * The Initial Developer of the Original Code is
 17 * Netscape Communications Corporation.
 18 * Portions created by the Initial Developer are Copyright (C) 1994-2000
 19 * the Initial Developer. All Rights Reserved.
 20 *
 21 * Contributor(s):
 22 *
 23 * Alternatively, the contents of this file may be used under the terms of
 24 * either the GNU General Public License Version 2 or later (the "GPL"), or
 25 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 26 * in which case the provisions of the GPL or the LGPL are applicable instead
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 35 * ***** END LICENSE BLOCK ***** */
 36
 37#ifndef __JAR_DS_h_
 38#define __JAR_DS_h_
 39
 40/* Typedefs */
 41typedef struct ZZLinkStr ZZLink;
 42typedef struct ZZListStr ZZList;
 43
 44/*
 45** Circular linked list. Each link contains a pointer to the object that
 46** is actually in the list.
 47*/ 
 48struct ZZLinkStr 
 49{
 50    ZZLink *next;
 51    ZZLink *prev;
 52    JAR_Item *thing;
 53};
 54
 55struct ZZListStr 
 56{
 57    ZZLink link;
 58};
 59
 60#define ZZ_InitList(lst)	     \
 61{				     \
 62    (lst)->link.next = &(lst)->link; \
 63    (lst)->link.prev = &(lst)->link; \
 64    (lst)->link.thing = 0;	     \
 65}
 66
 67#define ZZ_ListEmpty(lst) \
 68    ((lst)->link.next == &(lst)->link)
 69
 70#define ZZ_ListHead(lst) \
 71    ((lst)->link.next)
 72
 73#define ZZ_ListTail(lst) \
 74    ((lst)->link.prev)
 75
 76#define ZZ_ListIterDone(lst,lnk) \
 77    ((lnk) == &(lst)->link)
 78
 79#define ZZ_AppendLink(lst,lnk)	    \
 80{				    \
 81    (lnk)->next = &(lst)->link;	    \
 82    (lnk)->prev = (lst)->link.prev; \
 83    (lst)->link.prev->next = (lnk); \
 84    (lst)->link.prev = (lnk);	    \
 85}
 86
 87#define ZZ_InsertLink(lst,lnk)	    \
 88{				    \
 89    (lnk)->next = (lst)->link.next; \
 90    (lnk)->prev = &(lst)->link;	    \
 91    (lst)->link.next->prev = (lnk); \
 92    (lst)->link.next = (lnk);	    \
 93}
 94
 95#define ZZ_RemoveLink(lnk)	     \
 96{				     \
 97    (lnk)->next->prev = (lnk)->prev; \
 98    (lnk)->prev->next = (lnk)->next; \
 99    (lnk)->next = 0;		     \
100    (lnk)->prev = 0;		     \
101}
102
103extern ZZLink *ZZ_NewLink (JAR_Item *thing);
104extern void ZZ_DestroyLink (ZZLink *link);
105extern ZZList *ZZ_NewList (void);
106extern void ZZ_DestroyList (ZZList *list);
107
108
109#endif /* __JAR_DS_h_ */