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Commit	Line	Data
	1	/*
	2	* Copyright (c) 1999-2001, 2005-2007 Apple Inc. All Rights Reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	Protocol.h
	25	Copyright 1991-1996 NeXT Software, Inc.
	26	*/
	27
	28	#include "objc-private.h"
	29
	30	#undef id
	31	#undef Class
	32
	33	#include <stdlib.h>
	34	#include <string.h>
	35	#include <mach-o/dyld.h>
	36	#include <mach-o/ldsyms.h>
	37
	38	#include "Protocol.h"
	39	#include "NSObject.h"
	40
	41	// __IncompleteProtocol is used as the return type of objc_allocateProtocol().
	42
	43	// Old ABI uses NSObject as the superclass even though Protocol uses Object
	44	// because the R/R implementation for class Protocol is added at runtime
	45	// by CF, so __IncompleteProtocol would be left without an R/R implementation
	46	// otherwise, which would break ARC.
	47
	48	@interface __IncompleteProtocol : NSObject
	49	@end
	50
	51	#if __OBJC2__
	52	__attribute__((objc_nonlazy_class))
	53	#endif
	54	@implementation __IncompleteProtocol
	55	@end
	56
	57
	58	#if __OBJC2__
	59	__attribute__((objc_nonlazy_class))
	60	#endif
	61	@implementation Protocol
	62
	63	- (BOOL) conformsTo: (Protocol *)aProtocolObj
	64	{
	65	return protocol_conformsToProtocol(self, aProtocolObj);
	66	}
	67
	68	- (struct objc_method_description *) descriptionForInstanceMethod:(SEL)aSel
	69	{
	70	#if !__OBJC2__
	71	return lookup_protocol_method((struct old_protocol *)self, aSel,
	72	YES/required/, YES/instance/,
	73	YES/recursive/);
	74	#else
	75	return method_getDescription(protocol_getMethod((struct protocol_t *)self,
	76	aSel, YES, YES, YES));
	77	#endif
	78	}
	79
	80	- (struct objc_method_description *) descriptionForClassMethod:(SEL)aSel
	81	{
	82	#if !__OBJC2__
	83	return lookup_protocol_method((struct old_protocol *)self, aSel,
	84	YES/required/, NO/instance/,
	85	YES/recursive/);
	86	#else
	87	return method_getDescription(protocol_getMethod((struct protocol_t *)self,
	88	aSel, YES, NO, YES));
	89	#endif
	90	}
	91
	92	- (const char *)name
	93	{
	94	return protocol_getName(self);
	95	}
	96
	97	- (BOOL)isEqual:other
	98	{
	99	#if __OBJC2__
	100	// check isKindOf:
	101	Class cls;
	102	Class protoClass = objc_getClass("Protocol");
	103	for (cls = object_getClass(other); cls; cls = cls->getSuperclass()) {
	104	if (cls == protoClass) break;
	105	}
	106	if (!cls) return NO;
	107	// check equality
	108	return protocol_isEqual(self, other);
	109	#else
	110	return [other isKindOf:[Protocol class]] && [self conformsTo: other] && [other conformsTo: self];
	111	#endif
	112	}
	113
	114	#if __OBJC2__
	115	- (NSUInteger)hash
	116	{
	117	return 23;
	118	}
	119	#else
	120	- (unsigned)hash
	121	{
	122	return 23;
	123	}
	124	#endif
	125
	126	@end