/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019, 2020
* Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "OFObject.h"
#import "OFCollection.h"
#import "OFEnumerator.h"
#import "OFSerialization.h"
OF_ASSUME_NONNULL_BEGIN
typedef struct of_list_object_t of_list_object_t;
/**
* @struct of_list_object_t OFList.h ObjFW/OFList.h
*
* @brief A list object.
*
* A struct that contains a pointer to the next list object, the previous list
* object and the object.
*/
struct of_list_object_t {
/** A pointer to the next list object in the list */
of_list_object_t *_Nullable next;
/** A pointer to the previous list object in the list */
of_list_object_t *_Nullable previous;
/** The object for the list object */
id __unsafe_unretained object;
};
/**
* @class OFList OFList.h ObjFW/OFList.h
*
* @brief A class which provides easy to use double-linked lists.
*/
@interface OFList OF_GENERIC(ObjectType): OFObject <OFCopying, OFCollection,
OFSerialization>
#if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
# define ObjectType id
#endif
{
of_list_object_t *_Nullable _firstListObject;
of_list_object_t *_Nullable _lastListObject;
size_t _count;
unsigned long _mutations;
OF_RESERVE_IVARS(OFList, 4)
}
/**
* @brief The first list object of the list.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic)
of_list_object_t *firstListObject;
/**
* @brief The first object of the list or `nil`.
*
* @warning The returned object is *not* retained and autoreleased for
* performance reasons!
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) ObjectType firstObject;
/**
* @brief The last list object of the list.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic)
of_list_object_t *lastListObject;
/**
* @brief The last object of the list or `nil`.
*
* @warning The returned object is *not* retained and autoreleased for
* performance reasons!
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) ObjectType lastObject;
/**
* @brief Creates a new OFList.
*
* @return A new autoreleased OFList
*/
+ (instancetype)list;
/**
* @brief Appends an object to the list.
*
* @param object 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 *)appendObject: (ObjectType)object;
/**
* @brief Prepends an object to the list.
*
* @param object 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 *)prependObject: (ObjectType)object;
/**
* @brief Inserts an object before another list object.
*
* @param object The object to insert
* @param listObject 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 *)insertObject: (ObjectType)object
beforeListObject: (of_list_object_t *)listObject;
/**
* @brief Inserts an object after another list object.
*
* @param object The object to insert
* @param listObject 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 *)insertObject: (ObjectType)object
afterListObject: (of_list_object_t *)listObject;
/**
* @brief Removes the object with the specified list object from the list.
*
* @param listObject The list object returned by append / prepend
*/
- (void)removeListObject: (of_list_object_t *)listObject;
/**
* @brief Checks whether the list contains an object equal to the specified
* object.
*
* @param object The object which is checked for being in the list
* @return A boolean whether the list contains the specified object
*/
- (bool)containsObject: (ObjectType)object;
/**
* @brief Checks whether the list contains an object with the specified address.
*
* @param object The object which is checked for being in the list
* @return A boolean whether the list contains an object with the specified
* address
*/
- (bool)containsObjectIdenticalTo: (ObjectType)object;
/**
* @brief Removes all objects from the list.
*/
- (void)removeAllObjects;
#if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
# undef ObjectType
#endif
@end
OF_ASSUME_NONNULL_END