/*
* Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3.0 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3.0 along with this program. If not, see
* <https://www.gnu.org/licenses/>.
*/
#import "OFObject.h"
#import "OFCollection.h"
#import "OFEnumerator.h"
OF_ASSUME_NONNULL_BEGIN
/** @file */
/*
* Make clang's -Wdocumentation shut up about about using @struct on something
* it thinks is not a struct. Doxygen requires it this way.
*/
#ifdef __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wdocumentation"
#endif
/**
* @struct OFListItem OFList.h ObjFW/OFList.h
*
* @brief A list item.
*
* See @ref OFListItemNext, @ref OFListItemPrevious and @ref OFListItemObject.
*/
typedef struct _OFListItem *OFListItem;
#ifdef __clang__
# pragma clang diagnostic pop
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*!
* @brief Returns the next list item of the list item.
*
* @param listItem The list item for which the next list item should be returned
* @return The next list item of the list item
*/
extern OFListItem _Nullable OFListItemNext(OFListItem _Nonnull listItem);
/*!
* @brief Returns the previous list item of the list item.
*
* @param listItem The list item for which the previous list item should be
* returned
* @return The previous list item of the list item
*/
extern OFListItem _Nullable OFListItemPrevious(OFListItem _Nonnull listItem);
/*!
* @brief Returns the object of the list item.
*
* @warning The returned object is not retained and autoreleased - this is the
* caller's responsibility!
*
* @param listItem The list item for which the object should be returned
* @return The object of the list item
*/
extern id _Nonnull OFListItemObject(OFListItem _Nonnull listItem);
#ifdef __cplusplus
}
#endif
/**
* @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>
#if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
# define ObjectType id
#endif
{
OFListItem _Nullable _firstListItem;
OFListItem _Nullable _lastListItem;
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) OFListItem firstListItem;
/**
* @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) OFListItem lastListItem;
/**
* @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 OFListItem, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its OFListItem.
*/
- (OFListItem)appendObject: (ObjectType)object;
/**
* @brief Prepends an object to the list.
*
* @param object The object to prepend
* @return An OFListItem, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its OFListItem.
*/
- (OFListItem)prependObject: (ObjectType)object;
/**
* @brief Inserts an object before another list object.
*
* @param object The object to insert
* @param listItem The OFListItem of the object before which it should be
* inserted
* @return An OFListItem, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its OFListItem.
*/
- (OFListItem)insertObject: (ObjectType)object
beforeListItem: (OFListItem)listItem;
/**
* @brief Inserts an object after another list object.
*
* @param object The object to insert
* @param listItem The OFListItem of the object after which it should be
* inserted
* @return An OFListItem, needed to identify the object inside the list.
* For example, if you want to remove an object from the list, you need
* its OFListItem.
*/
- (OFListItem)insertObject: (ObjectType)object
afterListItem: (OFListItem)listItem;
/**
* @brief Removes the object with the specified list object from the list.
*
* @param listItem The list object returned by append / prepend
*/
- (void)removeListItem: (OFListItem)listItem;
/**
* @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