ObjFW  Artifact [cd088af64e]

Artifact cd088af64ea853cc6d402e1a3221959b8f816fe0a6c32b4671153709758ca3b5:

• File src/OFValue.h — part of check-in [496695d778] at 2019-09-29 19:35:38 on branch trunk — Either restrict subclassing or reserve ivar space

  This allows ABI stability with the fragile ABI. (user: js, size: 6621) [annotate] [blame] [check-ins using] [more...]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
 *               2018, 2019
 *   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.
 */

#import "OFObject.h"

OF_ASSUME_NONNULL_BEGIN

/*!
 * @class OFValue OFValue.h ObjFW/OFValue.h
 *
 * @brief A class for storing arbitrary values in an object.
 */
@interface OFValue: OFObject <OFCopying>
{
	OF_RESERVE_IVARS(4)
}

/*!
 * @brief The ObjC type encoding of the value.
 */
@property (readonly, nonatomic) const char *objCType;

/*!
 * @brief The value as a pointer to void.
 *
 * If the value is not pointer-sized, @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) void *pointerValue;

/*!
 * @brief The value as a non-retained object.
 *
 * If the value is not pointer-sized, @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) id nonretainedObjectValue;

/*!
 * @brief The value as a range.
 *
 * If the value is not range-sized, @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) of_range_t rangeValue;

/*!
 * @brief The value as a point.
 *
 * If the value is not point-sized, @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) of_point_t pointValue;

/*!
 * @brief The value as a dimension.
 *
 * If the value is not dimension-sized, @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) of_dimension_t dimensionValue;

/*!
 * @brief The value as a rectangle.
 *
 * If the value is not rectangle-sized, @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) of_rectangle_t rectangleValue;

/*!
 * @brief Creates a new, autorelease OFValue with the specified bytes of the
 *	  specified type.
 *
 * @param bytes The bytes containing the value
 * @param objCType The ObjC type encoding for the value
 * @return A new, autoreleased OFValue
 */
+ (instancetype)valueWithBytes: (const void *)bytes
		      objCType: (const char *)objCType;

/*!
 * @brief Creates a new, autoreleased OFValue containing the specified pointer.
 *
 * Only the raw value of the pointer is stored and no data will be copied.
 *
 * @param pointer The pointer the OFValue should contain
 * @return A new, autoreleased OFValue
 */
+ (instancetype)valueWithPointer: (const void *)pointer;

/*!
 * @brief Creates a new, autoreleased OFValue containing the specified
 *	  non-retained object.
 *
 * The object is not retained, which makes this useful for storing objects in
 * collections without retaining them.
 *
 * @param object The object the OFValue should contain without retaining it
 * @return A new, autoreleased OFValue
 */
+ (instancetype)valueWithNonretainedObject: (id)object;

/*!
 * @brief Creates a new, autoreleased OFValue containing the specified range.
 *
 * @param range The range the OFValue should contain
 * @return A new, autoreleased OFValue
 */
+ (instancetype)valueWithRange: (of_range_t)range;

/*!
 * @brief Creates a new, autoreleased OFValue containing the specified point.
 *
 * @param point The point the OFValue should contain
 * @return A new, autoreleased OFValue
 */
+ (instancetype)valueWithPoint: (of_point_t)point;

/*!
 * @brief Creates a new, autoreleased OFValue containing the specified
 *	  dimension.
 *
 * @param dimension The dimension the OFValue should contain
 * @return A new, autoreleased OFValue
 */
+ (instancetype)valueWithDimension: (of_dimension_t)dimension;

/*!
 * @brief Creates a new, autoreleased OFValue containing the specified
 *	  rectangle.
 *
 * @param rectangle The rectangle the OFValue should contain
 * @return A new, autoreleased OFValue
 */
+ (instancetype)valueWithRectangle: (of_rectangle_t)rectangle;

/*!
 * @brief Initializes an already allocated OFValue with the specified bytes of
 *	  the specified type.
 *
 * @param bytes The bytes containing the value
 * @param objCType The ObjC type encoding for the value
 * @return An initialized OFValue
 */
- (instancetype)initWithBytes: (const void *)bytes
		     objCType: (const char *)objCType;

/*!
 * @brief Initializes an already allocated OFValue containing the specified
 *	  pointer.
 *
 * Only the raw value of the pointer is stored and no data will be copied.
 *
 * @param pointer The pointer the OFValue should contain
 * @return An initialized OFValue
 */
- (instancetype)initWithPointer: (const void *)pointer;

/*!
 * @brief Initializes an already allocated OFValue containing the specified
 *	  non-retained object.
 *
 * The object is not retained, which makes this useful for storing objects in
 * collections without retaining them.
 *
 * @param object The object the OFValue should contain without retaining it
 * @return An initialized OFValue
 */
- (instancetype)initWithNonretainedObject: (id)object;

/*!
 * @brief Initializes an already allocated OFValue containing the specified
 *	  range.
 *
 * @param range The range the OFValue should contain
 * @return An initialized OFValue
 */
- (instancetype)initWithRange: (of_range_t)range;

/*!
 * @brief Initializes an already allocated OFValue containing the specified
 *	  point.
 *
 * @param point The point the OFValue should contain
 * @return An initialized OFValue
 */
- (instancetype)initWithPoint: (of_point_t)point;

/*!
 * @brief Initializes an already allocated OFValue containing the specified
 *	  dimension.
 *
 * @param dimension The dimension the OFValue should contain
 * @return An initialized OFValue
 */
- (instancetype)initWithDimension: (of_dimension_t)dimension;

/*!
 * @brief Initializes an already allocated OFValue containing the specified
 *	  rectangle.
 *
 * @param rectangle The rectangle the OFValue should contain
 * @return An initialized OFValue
 */
- (instancetype)initWithRectangle: (of_rectangle_t)rectangle;

/*!
 * @brief Gets the value.
 *
 * If the specified size does not match, this raises an
 * @ref OFOutOfRangeException.
 *
 * @param value The buffer to copy the value into
 * @param size The size of the value
 */
- (void)getValue: (void *)value
	    size: (size_t)size;
@end

OF_ASSUME_NONNULL_END

#if !defined(NSINTEGER_DEFINED) && !__has_feature(modules)
/* Required for array literals to work */
@compatibility_alias NSValue OFValue;
#endif