/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 * Jonathan Schleifer <js@heap.zone> * * 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. */ #include "objfw-defs.h" #ifndef __STDC_LIMIT_MACROS # define __STDC_LIMIT_MACROS #endif #ifndef __STDC_CONSTANT_MACROS # define __STDC_CONSTANT_MACROS #endif #include <stddef.h> #include <stdint.h> #include <stdbool.h> #include <limits.h> #import "macros.h" #import "autorelease.h" #import "block.h" OF_ASSUME_NONNULL_BEGIN /*! @file */ /*! * @brief A result of a comparison. */ typedef enum { /*! The left object is smaller than the right */ OF_ORDERED_ASCENDING = -1, /*! Both objects are equal */ OF_ORDERED_SAME = 0, /*! The left object is bigger than the right */ OF_ORDERED_DESCENDING = 1 } of_comparison_result_t; /*! * @brief An enum for storing endianess. */ typedef enum { /*! Most significant byte first (big endian) */ OF_BYTE_ORDER_BIG_ENDIAN, /*! Least significant byte first (little endian) */ OF_BYTE_ORDER_LITTLE_ENDIAN } of_byte_order_t; /*! * @struct of_range_t OFObject.h ObjFW/OFObject.h * * @brief A range. */ typedef struct { /*! The start of the range */ size_t location; /*! The length of the range */ size_t length; } of_range_t; /*! * @brief Creates a new of_range_t. * * @param start The starting index of the range * @param length The length of the range * @return An of_range with the specified start and length */ static OF_INLINE of_range_t OF_CONST_FUNC of_range(size_t start, size_t length) { of_range_t range = { start, length }; return range; } /*! * @brief A time interval in seconds. */ typedef double of_time_interval_t; /*! * @struct of_point_t OFObject.h ObjFW/OFObject.h * * @brief A point. */ typedef struct { /*! The x coordinate of the point */ float x; /*! The y coordinate of the point */ float y; } of_point_t; /*! * @brief Creates a new of_point_t. * * @param x The x coordinate of the point * @param y The x coordinate of the point * @return An of_point_t with the specified coordinates */ static OF_INLINE of_point_t OF_CONST_FUNC of_point(float x, float y) { of_point_t point = { x, y }; return point; } /*! * @struct of_dimension_t OFObject.h ObjFW/OFObject.h * * @brief A dimension. */ typedef struct { /*! The width of the dimension */ float width; /*! The height of the dimension */ float height; } of_dimension_t; /*! * @brief Creates a new of_dimension_t. * * @param width The width of the dimension * @param height The height of the dimension * @return An of_dimension_t with the specified width and height */ static OF_INLINE of_dimension_t OF_CONST_FUNC of_dimension(float width, float height) { of_dimension_t dimension = { width, height }; return dimension; } /*! * @struct of_rectangle_t OFObject.h ObjFW/OFObject.h * * @brief A rectangle. */ typedef struct { /*! The point from where the rectangle originates */ of_point_t origin; /*! The size of the rectangle */ of_dimension_t size; } of_rectangle_t; /*! * @brief Creates a new of_rectangle_t. * * @param x The x coordinate of the top left corner of the rectangle * @param y The y coordinate of the top left corner of the rectangle * @param width The width of the rectangle * @param height The height of the rectangle * @return An of_rectangle_t with the specified origin and size */ static OF_INLINE of_rectangle_t OF_CONST_FUNC of_rectangle(float x, float y, float width, float height) { of_rectangle_t rectangle = { of_point(x, y), of_dimension(width, height) }; return rectangle; } @class OFString; @class OFThread; /*! * @protocol OFObject OFObject.h ObjFW/OFObject.h * * @brief The protocol which all root classes implement. */ @protocol OFObject /*! * @brief Returns the class of the object. * * @return The class of the object */ - (Class)class; /*! * @brief Returns the superclass of the object. * * @return The superclass of the object */ - (Class)superclass; /*! * @brief Returns a boolean whether the object of the specified kind. * * @param class_ The class whose kind is checked * @return A boolean whether the object is of the specified kind */ - (bool)isKindOfClass: (Class)class_; /*! * @brief Returns a boolean whether the object is a member of the specified * class. * * @param class_ The class for which the receiver is checked * @return A boolean whether the object is a member of the specified class */ - (bool)isMemberOfClass: (Class)class_; /*! * @brief Returns a boolean whether the object responds to the specified * selector. * * @param selector The selector which should be checked for respondance * @return A boolean whether the objects responds to the specified selector */ - (bool)respondsToSelector: (SEL)selector; /*! * @brief Checks whether the object conforms to the specified protocol. * * @param protocol The protocol which should be checked for conformance * @return A boolean whether the object conforms to the specified protocol */ - (bool)conformsToProtocol: (Protocol*)protocol; /*! * @brief Returns the implementation for the specified selector. * * @param selector The selector for which the method should be returned * @return The implementation for the specified selector */ - (nullable IMP)methodForSelector: (SEL)selector; /*! * @brief Returns the type encoding for the specified selector. * * @param selector The selector for which the type encoding should be returned * @return The type encoding for the specified selector */ - (nullable const char*)typeEncodingForSelector: (SEL)selector; /*! * @brief Performs the specified selector. * * @param selector The selector to perform * @return The object returned by the method specified by the selector */ - (nullable id)performSelector: (SEL)selector; /*! * @brief Performs the specified selector with the specified object. * * @param selector The selector to perform * @param object The object that is passed to the method specified by the * selector * @return The object returned by the method specified by the selector */ - (nullable id)performSelector: (SEL)selector withObject: (nullable id)object; /*! * @brief Performs the specified selector with the specified objects. * * @param selector The selector to perform * @param object1 The first object that is passed to the method specified by the * selector * @param object2 The second object that is passed to the method specified by * the selector * @return The object returned by the method specified by the selector */ - (nullable id)performSelector: (SEL)selector withObject: (nullable id)object1 withObject: (nullable id)object2; /*! * @brief Checks two objects for equality. * * Classes containing data (like strings, arrays, lists etc.) should reimplement * this! * * @warning If you reimplement this, you also need to reimplement @ref hash to * return the same hash for objects which are equal! * * @param object The object which should be tested for equality * @return A boolean whether the object is equal to the specified object */ - (bool)isEqual: (nullable id)object; /*! * @brief Calculates a hash for the object. * * Classes containing data (like strings, arrays, lists etc.) should reimplement * this! * * @warning If you reimplement this, you also need to reimplement @ref isEqual: * to behave in a way compatible to your reimplementation of this * method! * * @return A 32 bit hash for the object */ - (uint32_t)hash; /*! * @brief Increases the retain count. * * Each time an object is released, the retain count gets decreased and the * object deallocated if it reaches 0. */ - retain; /*! * @brief Returns the retain count. * * @return The retain count */ - (unsigned int)retainCount; /*! * @brief Decreases the retain count. * * Each time an object is released, the retain count gets decreased and the * object deallocated if it reaches 0. */ - (void)release; /*! * @brief Adds the object to the topmost OFAutoreleasePool of the thread's * autorelease pool stack. * * @return The object */ - autorelease; /*! * @brief Returns the receiver. * * @return The receiver */ - self; /*! * @brief Returns whether the object is a proxy object. * * @return A boolean whether the object is a proxy object */ - (bool)isProxy; /*! * @brief Returns whether the class allows weak references. * * @return Whether the class allows weak references */ - (bool)allowsWeakReference; /*! * @brief Retain a weak reference to this object. * * @return Whether a weak reference to this object has been retained */ - (bool)retainWeakReference; @end /*! * @class OFObject OFObject.h ObjFW/OFObject.h * * @brief The root class for all other classes inside ObjFW. */ OF_ROOT_CLASS @interface OFObject <OFObject> { @private Class _isa; } /*! * @brief A method which is called once when the class is loaded into the * runtime. * * Derived classes can override this to execute their own code when the class * is loaded. */ + (void)load; /*! * @brief A method which is called when the class is unloaded from the runtime. * * Derived classes can override this to execute their own code when the class * is unloaded. * * @warning This is not supported by the Apple runtime and currently only * called by the ObjFW runtime when objc_unregister_class() or * objc_exit() has been called! * In the future, this might also be called by the ObjFW runtime when * the class is part of a plugin that has been unloaded. */ + (void)unload; /*! * @brief A method which is called the moment before the first call to the class * is being made. * * Derived classes can override this to execute their own code on * initialization. They should make sure to not execute any code if self is not * the class itself, as it might happen that the method was called for a * subclass which did not override this method. */ + (void)initialize; /*! * @brief Allocates memory for an instance of the class and sets up the memory * pool for the object. * * This method will never return `nil`, instead, it will throw an * @ref OFAllocFailedException. * * @return The allocated object */ + alloc; /*! * @brief Allocates memory for a new instance and calls @ref init on it. * @return An allocated and initialized object */ + new; /*! * @brief Returns the class. * * @return The class */ + (Class)class; /*! * @brief Returns the name of the class as a string. * * @return The name of the class as a string */ + (OFString*)className; /*! * @brief Returns a boolean whether the class is a subclass of the specified * class. * * @param class_ The class which is checked for being a superclass * @return A boolean whether the class is a subclass of the specified class */ + (bool)isSubclassOfClass: (Class)class_; /*! * @brief Returns the superclass of the class. * * @return The superclass of the class */ + (Class)superclass; /*! * @brief Checks whether instances of the class respond to a given selector. * * @param selector The selector which should be checked for respondance * @return A boolean whether instances of the class respond to the specified * selector */ + (bool)instancesRespondToSelector: (SEL)selector; /*! * @brief Checks whether the class conforms to a given protocol. * * @param protocol The protocol which should be checked for conformance * @return A boolean whether the class conforms to the specified protocol */ + (bool)conformsToProtocol: (Protocol*)protocol; /*! * @brief Returns the implementation of the instance method for the specified * selector. * * @param selector The selector for which the method should be returned * @return The implementation of the instance method for the specified selector * or `nil` if it isn't implemented */ + (nullable IMP)instanceMethodForSelector: (SEL)selector; /*! * @brief Returns the type encoding of the instance method for the specified * selector. * * @param selector The selector for which the type encoding should be returned * @return The type encoding of the instance method for the specified selector */ + (nullable const char*)typeEncodingForInstanceSelector: (SEL)selector; /*! * @brief Returns a description for the class, which is usually the class name. * * This is mostly for debugging purposes. * * @return A description for the class, which is usually the class name */ + (OFString*)description; /*! * @brief Replaces a class method with a class method from another class. * * @param selector The selector of the class method to replace * @param class_ The class from which the new class method should be taken * @return The old implementation */ + (nullable IMP)replaceClassMethod: (SEL)selector withMethodFromClass: (Class)class_; /*! * @brief Replaces an instance method with an instance method from another * class. * * @param selector The selector of the instance method to replace * @param class_ The class from which the new instance method should be taken * @return The old implementation */ + (nullable IMP)replaceInstanceMethod: (SEL)selector withMethodFromClass: (Class)class_; /*! * @brief Replaces or adds a class method. * * If the method already exists, it is replaced and the old implementation * returned. If the method does not exist, it is added with the specified type * encoding. * * @param selector The selector for the new method * @param implementation The implementation for the new method * @param typeEncoding The type encoding for the new method * @return The old implementation or `nil` if the method was added */ + (nullable IMP)replaceClassMethod: (SEL)selector withImplementation: (IMP)implementation typeEncoding: (const char*)typeEncoding; /*! * @brief Replaces or adds an instance method. * * If the method already exists, it is replaced and the old implementation * returned. If the method does not exist, it is added with the specified type * encoding. * * @param selector The selector for the new method * @param implementation The implementation for the new method * @param typeEncoding The type encoding for the new method * @return The old implementation or `nil` if the method was added */ + (nullable IMP)replaceInstanceMethod: (SEL)selector withImplementation: (IMP)implementation typeEncoding: (const char*)typeEncoding; /*! * @brief Adds all methods from the specified class to the class that is the * receiver. * * Methods implemented by the receiving class itself will not be overridden, * however methods implemented by its superclass will. Therefore it behaves * similar as if the specified class is the superclass of the receiver. * * All methods from the superclasses of the specified class will also be added. * * If the specified class is a superclass of the receiving class, nothing is * done. * * The methods which will be added from the specified class are not allowed to * use super or access instance variables, instead they have to use accessors. * * @param class_ The class from which the instance methods should be inherited */ + (void)inheritMethodsFromClass: (Class)class_; /*! * @brief Try to resolve the specified class method. * * This method is called if a class method was not found, so that an * implementation can be provided at runtime. * * @return Whether the method has been added to the class */ + (bool)resolveClassMethod: (SEL)selector; /*! * @brief Try to resolve the specified instance method. * * This method is called if an instance method was not found, so that an * implementation can be provided at runtime. * * @return Whether the method has been added to the class */ + (bool)resolveInstanceMethod: (SEL)selector; /*! * @brief Returns the class. * * This method exists so that classes can be used in collections requiring * conformance to the OFCopying protocol. * * @return The class of the object */ + copy; /*! * @brief Initializes an already allocated object. * * Derived classes may override this, but need to do * @code * self = [super init] * @endcode * before they do any initialization themselves. @ref init may never return * `nil`, instead an exception (for example @ref * OFInitializationFailedException) should be thrown. * * @return An initialized object */ - init; /*! * @brief Returns the name of the object's class. * * @return The name of the object's class */ - (OFString*)className; /*! * @brief Returns a description for the object. * * This is mostly for debugging purposes. * * @return A description for the object */ - (OFString*)description; /*! * @brief Allocates memory and stores it in the object's memory pool. * * It will be free'd automatically when the object is deallocated. * * @param size The size of the memory to allocate * @return A pointer to the allocated memory */ - (void*)allocMemoryWithSize: (size_t)size; /*! * @brief Allocates memory for the specified number of items and stores it in * the object's memory pool. * * It will be free'd automatically when the object is deallocated. * * @param size The size of each item to allocate * @param count The number of items to allocate * @return A pointer to the allocated memory */ - (void*)allocMemoryWithSize: (size_t)size count: (size_t)count; /*! * @brief Resizes memory in the object's memory pool to the specified size. * * If the pointer is NULL, this is equivalent to allocating memory. * If the size is 0, this is equivalent to freeing memory. * * @param pointer A pointer to the already allocated memory * @param size The new size for the memory chunk * @return A pointer to the resized memory chunk */ - (nullable void*)resizeMemory: (nullable void*)pointer size: (size_t)size; /*! * @brief Resizes memory in the object's memory pool to the specific number of * items of the specified size. * * If the pointer is NULL, this is equivalent to allocating memory. * If the size or number of items is 0, this is equivalent to freeing memory. * * @param pointer A pointer to the already allocated memory * @param size The size of each item to resize to * @param count The number of items to resize to * @return A pointer to the resized memory chunk */ - (nullable void*)resizeMemory: (nullable void*)pointer size: (size_t)size count: (size_t)count; /*! * @brief Frees allocated memory and removes it from the object's memory pool. * * Does nothing if the pointer is NULL. * * @param pointer A pointer to the allocated memory */ - (void)freeMemory: (nullable void*)pointer; /*! * @brief Deallocates the object. * * It is automatically called when the retain count reaches zero. * * This also frees all memory in its memory pool. */ - (void)dealloc; /*! * @brief Performs the specified selector after the specified delay. * * @param selector The selector to perform * @param delay The delay after which the selector will be performed */ - (void)performSelector: (SEL)selector afterDelay: (of_time_interval_t)delay; /*! * @brief Performs the specified selector with the specified object after the * specified delay. * * @param selector The selector to perform * @param object The object that is passed to the method specified by the * selector * @param delay The delay after which the selector will be performed */ - (void)performSelector: (SEL)selector withObject: (nullable id)object afterDelay: (of_time_interval_t)delay; /*! * @brief Performs the specified selector with the specified objects after the * specified delay. * * @param selector The selector to perform * @param object1 The first object that is passed to the method specified by the * selector * @param object2 The second object that is passed to the method specified by * the selector * @param delay The delay after which the selector will be performed */ - (void)performSelector: (SEL)selector withObject: (nullable id)object1 withObject: (nullable id)object2 afterDelay: (of_time_interval_t)delay; #ifdef OF_HAVE_THREADS /*! * @brief Performs the specified selector on the specified thread. * * @param selector The selector to perform * @param thread The thread on which to perform the selector * @param waitUntilDone Whether to wait until the perform finished */ - (void)performSelector: (SEL)selector onThread: (OFThread*)thread waitUntilDone: (bool)waitUntilDone; /*! * @brief Performs the specified selector on the specified thread with the * specified object. * * @param selector The selector to perform * @param thread The thread on which to perform the selector * @param object The object that is passed to the method specified by the * selector * @param waitUntilDone Whether to wait until the perform finished */ - (void)performSelector: (SEL)selector onThread: (OFThread*)thread withObject: (nullable id)object waitUntilDone: (bool)waitUntilDone; /*! * @brief Performs the specified selector on the specified thread with the * specified objects. * * @param selector The selector to perform * @param thread The thread on which to perform the selector * @param object1 The first object that is passed to the method specified by the * selector * @param object2 The second object that is passed to the method specified by * the selector * @param waitUntilDone Whether to wait until the perform finished */ - (void)performSelector: (SEL)selector onThread: (OFThread*)thread withObject: (nullable id)object1 withObject: (nullable id)object2 waitUntilDone: (bool)waitUntilDone; /*! * @brief Performs the specified selector on the main thread. * * @param selector The selector to perform * @param waitUntilDone Whether to wait until the perform finished */ - (void)performSelectorOnMainThread: (SEL)selector waitUntilDone: (bool)waitUntilDone; /*! * @brief Performs the specified selector on the main thread with the specified * object. * * @param selector The selector to perform * @param object The object that is passed to the method specified by the * selector * @param waitUntilDone Whether to wait until the perform finished */ - (void)performSelectorOnMainThread: (SEL)selector withObject: (nullable id)object waitUntilDone: (bool)waitUntilDone; /*! * @brief Performs the specified selector on the main thread with the specified * objects. * * @param selector The selector to perform * @param object1 The first object that is passed to the method specified by the * selector * @param object2 The second object that is passed to the method specified by * the selector * @param waitUntilDone Whether to wait until the perform finished */ - (void)performSelectorOnMainThread: (SEL)selector withObject: (nullable id)object1 withObject: (nullable id)object2 waitUntilDone: (bool)waitUntilDone; /*! * @brief Performs the specified selector on the specified thread after the * specified delay. * * @param selector The selector to perform * @param thread The thread on which to perform the selector * @param delay The delay after which the selector will be performed */ - (void)performSelector: (SEL)selector onThread: (OFThread*)thread afterDelay: (of_time_interval_t)delay; /*! * @brief Performs the specified selector on the specified thread with the * specified object after the specified delay. * * @param selector The selector to perform * @param thread The thread on which to perform the selector * @param object The object that is passed to the method specified by the * selector * @param delay The delay after which the selector will be performed */ - (void)performSelector: (SEL)selector onThread: (OFThread*)thread withObject: (nullable id)object afterDelay: (of_time_interval_t)delay; /*! * @brief Performs the specified selector on the specified thread with the * specified objects after the specified delay. * * @param selector The selector to perform * @param thread The thread on which to perform the selector * @param object1 The first object that is passed to the method specified by the * selector * @param object2 The second object that is passed to the method specified by * the selector * @param delay The delay after which the selector will be performed */ - (void)performSelector: (SEL)selector onThread: (OFThread*)thread withObject: (nullable id)object1 withObject: (nullable id)object2 afterDelay: (of_time_interval_t)delay; #endif /*! * @brief This method is called when @ref resolveClassMethod: or * @ref resolveInstanceMethod: returned false. It should return a target * to which the message should be forwarded. * * @note When the message should not be forwarded, you should not return `nil`, * but instead return the result of `[super * forwardingTargetForSelector: selector]`. * * @return The target to forward the message to */ - (nullable id)forwardingTargetForSelector: (SEL)selector; /*! * @brief Handles messages which are not understood by the receiver. * * @warning If you override this method, you must make sure that it never * returns! * * @param selector The selector not understood by the receiver */ - (void)doesNotRecognizeSelector: (SEL)selector OF_NO_RETURN; @end /*! * @protocol OFCopying OFObject.h ObjFW/OFObject.h * * @brief A protocol for the creation of copies. */ @protocol OFCopying /*! * @brief Copies the object. * * For classes which can be immutable or mutable, this returns an immutable * copy. If only a mutable version of the class exists, it creates a mutable * copy. * * @return A copy of the object */ - copy; @end /*! * @protocol OFMutableCopying OFObject.h ObjFW/OFObject.h * * @brief A protocol for the creation of mutable copies. * * This protocol is implemented by objects that can be mutable and immutable * and allows returning a mutable copy. */ @protocol OFMutableCopying /*! * @brief Creates a mutable copy of the object. * * @return A mutable copy of the object */ - mutableCopy; @end /*! * @protocol OFComparing OFObject.h ObjFW/OFObject.h * * @brief A protocol for comparing objects. * * This protocol is implemented by objects that can be compared. */ @protocol OFComparing <OFObject> /*! * @brief Compares the object with another object. * * @param object An object to compare the object to * @return The result of the comparison */ - (of_comparison_result_t)compare: (id <OFComparing>)object; @end #ifdef __cplusplus extern "C" { #endif extern id of_alloc_object(Class class_, size_t extraSize, size_t extraAlignment, void *_Nullable *_Nullable extra); extern void OF_NO_RETURN_FUNC of_method_not_found(id self, SEL _cmd); extern uint32_t of_hash_seed; #ifdef __cplusplus } #endif OF_ASSUME_NONNULL_END #import "OFObject+KeyValueCoding.h" #import "OFObject+Serialization.h"