/** 
 * @file GenLinkedList.h
 * @brief Mac OSX updater program
 *
 * $LicenseInfo:firstyear=2004&license=viewergpl$
 * 
 * Copyright (c) 2004-2007, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlife.com/developers/opensource/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at http://secondlife.com/developers/opensource/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

/*
	File:		GenLinkedList.h
	
	Contains:	Linked List utility routines prototypes

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*/


#ifndef __GENLINKEDLIST__
#define __GENLINKEDLIST__

#ifdef __cplusplus
extern "C" {
#endif

#if TARGET_API_MAC_OSX || defined( __APPLE_CC__ )
#include	<CoreServices/CoreServices.h>
#endif

/* This is a quick, simple and generic linked list implementation.  I tried		*/
/* to setup the code so that you could use any linked list implementation you	*/
/* want.  They just	need to support these few functions.						*/

typedef void*	GenIteratorPtr;
typedef void*	GenDataPtr;

	/* This is a callback that is called from DestroyList for each node in the	*/
	/* list.  It gives the caller the oportunity to free any memory they might	*/
	/* allocated in each node.													*/
typedef CALLBACK_API( void , DisposeDataProcPtr ) ( GenDataPtr pData );

#define CallDisposeDataProc( userRoutine, pData )	(*(userRoutine))((pData))

struct GenLinkedList
{
	GenDataPtr				pHead;				/* Pointer to the head of the list							*/
	GenDataPtr				pTail;				/* Pointer to the tail of the list							*/
	ItemCount				NumberOfItems;		/* Number of items in the list (mostly for debugging)		*/
	DisposeDataProcPtr		DisposeProcPtr;		/* rountine called to dispose of caller data, can be NULL	*/
};
typedef struct GenLinkedList	GenLinkedList;

void 		InitLinkedList	( GenLinkedList *pList, DisposeDataProcPtr disposeProcPtr );
ItemCount	GetNumberOfItems( GenLinkedList *pList );
OSErr		AddToTail		( GenLinkedList *pList, GenDataPtr pData );
void		InsertList		( GenLinkedList *pDestList, GenLinkedList *pSrcList, GenIteratorPtr pIter );
void		DestroyList		( GenLinkedList	*pList );

void		InitIterator	( GenLinkedList *pList, GenIteratorPtr *pIter );
void		Next			( GenIteratorPtr *pIter );
GenDataPtr	GetData			( GenIteratorPtr pIter );

#ifdef __cplusplus
}
#endif

#endif