/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013
* Jonathan Schleifer <js@webkeks.org>
*
* 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 "OFEnumerator.h"
/*! @file */
/*!
* @brief A struct describing the functions to be used by the map table.
*/
typedef struct of_map_table_functions_t {
/// The function to retain keys / values
void* (*retain)(void *value);
/// The function to release keys / values
void (*release)(void *value);
/// The function to hash keys
uint32_t (*hash)(void *value);
/// The function to compare keys / values
bool (*equal)(void *value1, void *value2);
} of_map_table_functions_t;
#ifdef OF_HAVE_BLOCKS
/*!
* @brief A block for enumerating an OFMapTable.
*
* @param key The current key
* @param value The current value
* @param stop A pointer to a variable that can be set to true to stop the
* enumeration
*/
typedef void (^of_map_table_enumeration_block_t)(void *key, void *value,
bool *stop);
/*!
* @brief A block for replacing values in an OFMapTable.
*
* @param key The key of the value to replace
* @param value The value to replace
* @return The value to replace the value with
*/
typedef void* (^of_map_table_replace_block_t)(void *key, void *value);
#endif
@class OFMapTableEnumerator;
/*!
* @brief A class similar to OFDictionary, but providing more options how keys
* and values should be retained, released, compared and hashed.
*/
@interface OFMapTable: OFObject <OFCopying, OFFastEnumeration>
{
of_map_table_functions_t _keyFunctions, _valueFunctions;
struct of_map_table_bucket **_buckets;
uint32_t _count, _capacity;
uint8_t _rotate;
unsigned long _mutations;
}
/*!
* @brief Creates a new OFMapTable with the specified key and value functions.
*
* @param keyFunctions A structure of functions for handling keys
* @param valueFunctions A structure of functions for handling values
* @return A new autoreleased OFMapTable
*/
+ (instancetype)mapTableWithKeyFunctions: (of_map_table_functions_t)keyFunctions
valueFunctions: (of_map_table_functions_t)
valueFunctions;
/*!
* @brief Creates a new OFMapTable with the specified key functions, value
* functions and capacity.
*
* @param keyFunctions A structure of functions for handling keys
* @param valueFunctions A structure of functions for handling values
* @param capacity A hint about the count of elements expected to be in the map
* table
* @return A new autoreleased OFMapTable
*/
+ (instancetype)mapTableWithKeyFunctions: (of_map_table_functions_t)keyFunctions
valueFunctions: (of_map_table_functions_t)
valueFunctions
capacity: (size_t)capacity;
/*!
* @brief Initializes an already allocated OFMapTable with the specified key
* and value functions.
*
* @param keyFunctions A structure of functions for handling keys
* @param valueFunctions A structure of functions for handling values
* @return An initialized OFMapTable
*/
- initWithKeyFunctions: (of_map_table_functions_t)keyFunctions
valueFunctions: (of_map_table_functions_t)valueFunctions;
/*!
* @brief Initializes an already allocated OFMapTable with the specified key
* functions, value functions and capacity.
*
* @param keyFunctions A structure of functions for handling keys
* @param valueFunctions A structure of functions for handling values
* @param capacity A hint about the count of elements expected to be in the map
* table
* @return An initialized OFMapTable
*/
- initWithKeyFunctions: (of_map_table_functions_t)keyFunctions
valueFunctions: (of_map_table_functions_t)valueFunctions
capacity: (size_t)capacity;
/*!
* @brief Returns the number of objects in the map table.
*
* @return The number of objects in the map table
*/
- (size_t)count;
/*!
* @brief Returns the value for the given key or nil if the key was not found.
*
* @param key The key whose object should be returned
* @return The value for the given key or nil if the key was not found
*/
- (void*)valueForKey: (void*)key;
- (void)OF_setValue: (void*)value
forKey: (void*)key
hash: (uint32_t)hash;
/*!
* @brief Sets a value for a key.
*
* @param key The key to set
* @param value The value to set the key to
*/
- (void)setValue: (void*)value
forKey: (void*)key;
/*!
* @brief Removes the value for the specified key from the map table.
*
* @param key The key whose object should be removed
*/
- (void)removeValueForKey: (void*)key;
/*!
* @brief Checks whether the map table contains a value equal to the specified
* value.
*
* @param value The value which is checked for being in the map table
* @return A boolean whether the map table contains the specified value
*/
- (bool)containsValue: (void*)value;
/*!
* @brief Checks whether the map table contains a value with the specified
* address.
*
* @param value The value which is checked for being in the map table
* @return A boolean whether the map table contains a value with the specified
* address.
*/
- (bool)containsValueIdenticalTo: (void*)value;
/*!
* @brief Returns an OFMapTableEnumerator to enumerate through the map table's
* keys.
*
* @return An OFMapTableEnumerator to enumerate through the map table's keys
*/
- (OFMapTableEnumerator*)keyEnumerator;
/*!
* @brief Returns an OFMapTableEnumerator to enumerate through the map table's
* values.
*
* @return An OFMapTableEnumerator to enumerate through the map table's values
*/
- (OFMapTableEnumerator*)valueEnumerator;
#ifdef OF_HAVE_BLOCKS
/*!
* @brief Executes a block for each key / object pair.
*
* @param block The block to execute for each key / object pair.
*/
- (void)enumerateKeysAndValuesUsingBlock:
(of_map_table_enumeration_block_t)block;
/*!
* @brief Replaces each value with the value returned by the block.
*
* @param block The block which returns a new value for each value
*/
- (void)replaceValuesUsingBlock: (of_map_table_replace_block_t)block;
#endif
/*!
* @brief Returns the key functions used by the map table.
*
* @return The key functions used by the map table
*/
- (of_map_table_functions_t)keyFunctions;
/*!
* @brief Returns the value functions used by the map table.
*
* @return The value functions used by the map table
*/
- (of_map_table_functions_t)valueFunctions;
@end
/*!
* @brief A class which provides methods to enumerate through an OFMapTable's
* keys or values.
*/
@interface OFMapTableEnumerator: OFObject
{
OFMapTable *_mapTable;
struct of_map_table_bucket **_buckets;
uint32_t _capacity;
unsigned long _mutations;
unsigned long *_mutationsPtr;
uint32_t _position;
}
- OF_initWithMapTable: (OFMapTable*)mapTable
buckets: (struct of_map_table_bucket**)buckets
capacity: (uint32_t)capacity
mutationsPointer: (unsigned long*)mutationsPtr;
/*!
* @brief Returns the next value.
*
* @return The next value
*/
- (void*)nextValue;
/*!
* @brief Resets the enumerator, so the next call to nextKey returns the first
* key again.
*/
- (void)reset;
@end
@interface OFMapTableEnumeratorWrapper: OFEnumerator
{
OFMapTableEnumerator *_enumerator;
id _object;
}
- initWithEnumerator: (OFMapTableEnumerator*)enumerator
object: (id)object;
@end