/*
* Copyright (c) 2008 - 2009
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of libobjfw. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE included in
* the packaging of this file.
*/
#import "OFObject.h"
/**
* A struct that contains a pointer to the next list object, the previous list
* object and the object.
*/
typedef struct __of_list_object
{
/// A pointer to the next list object in the list
struct __of_list_object *next;
/// A pointer to the previous list object in the list
struct __of_list_object *prev;
/// The object for the list object
id object;
} of_list_object_t;
/**
* The OFList class provides easy to use double-linked lists.
*/
@interface OFList: OFObject <OFCopying>
{
of_list_object_t *first;
of_list_object_t *last;
size_t listobj_size;
BOOL retain_and_release;
}
/**
* \return A new autoreleased OFList
*/
+ list;
/**
* \param listobj_size The size of a list object
* \return A new autoreleased OFList with the specified list object size
*/
+ listWithListObjectSize: (size_t)listobj_size;
/**
* Initializes an already allocated OFList with the specified list object size.
*
* \param listobj_size The size of a list object
* \return An initialized OFList with the specified list object size
*/
- initWithListObjectSize: (size_t)listobj_size;
/**
* Initializes an already allocated OFList that does not retain/release objects
* added to it.
*
* \return An initialized OFList
*/
- initWithoutRetainAndRelease;
/**
* \return The first list object in the list
*/
- (of_list_object_t*)first;
/**
* \return The last list object in the list
*/
- (of_list_object_t*)last;
/**
* Appends an object to the list.
*
* \param obj The object to append
* \return An of_list_object_t, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its of_list_object_t.
*/
- (of_list_object_t*)append: (id)obj;
/**
* Prepends an object to the list.
*
* \param obj The object to prepend
* \return An of_list_object_t, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its of_list_object_t.
*/
- (of_list_object_t*)prepend: (id)obj;
/**
* Inserts an object before another object.
* \param obj The object to insert
* \param listobj The of_list_object_t of the object before which it should be
* inserted
* \return An of_list_object_t, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its of_list_object_t.
*/
- (of_list_object_t*)insert: (id)obj
before: (of_list_object_t*)listobj;
/**
* Inserts an object after another object.
* \param obj The object to insert
* \param listobj The of_list_object_t of the object after which it should be
* inserted
* \return An of_list_object_t, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its of_list_object_t.
*/
- (of_list_object_t*)insert: (id)obj
after: (of_list_object_t*)listobj;
/**
* Removes the object with the specified list object from the list.
*
* \param listobj The list object returned by append / prepend
*/
- remove: (of_list_object_t*)listobj;
/**
* Get the number of items in the list. Use with caution, as this means one
* iteration through the whole list!
*
* \return The number of items in the list.
*/
- (size_t)count;
@end