/* This file contains the implementation of class Protocol.
- Copyright (C) 1993, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1993, 2004, 2009, 2010 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with files
- compiled with GCC to produce an executable, this does not cause
- the resulting executable to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
-#include "objc/Protocol.h"
-#include "objc/objc-api.h"
-
-/* Method description list */
-struct objc_method_description_list {
- int count;
- struct objc_method_description list[1];
-};
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+#include "objc-private/common.h"
+#include "objc/runtime.h"
+#include "objc/Protocol.h"
@implementation Protocol
-{
-@private
- char *protocol_name;
- struct objc_protocol_list *protocol_list;
- struct objc_method_description_list *instance_methods, *class_methods;
-}
-
-/* Obtaining attributes intrinsic to the protocol */
-
-- (const char *)name
-{
- return protocol_name;
-}
-
-/* Testing protocol conformance */
-
-- (BOOL) conformsTo: (Protocol *)aProtocolObject
-{
- size_t i;
- struct objc_protocol_list* proto_list;
-
- if (aProtocolObject == nil)
- return NO;
-
- if (!strcmp(aProtocolObject->protocol_name, self->protocol_name))
- return YES;
-
- for (proto_list = protocol_list; proto_list; proto_list = proto_list->next)
- {
- for (i=0; i < proto_list->count; i++)
- {
- if ([proto_list->list[i] conformsTo: aProtocolObject])
- return YES;
- }
- }
-
- return NO;
-}
-
-/* Looking up information specific to a protocol */
-
-- (struct objc_method_description *) descriptionForInstanceMethod:(SEL)aSel
-{
- int i;
- struct objc_protocol_list* proto_list;
- const char* name = sel_get_name (aSel);
- struct objc_method_description *result;
-
- if (instance_methods)
- for (i = 0; i < instance_methods->count; i++)
- {
- if (!strcmp ((char*)instance_methods->list[i].name, name))
- return &(instance_methods->list[i]);
- }
-
- for (proto_list = protocol_list; proto_list; proto_list = proto_list->next)
- {
- size_t j;
- for (j=0; j < proto_list->count; j++)
- {
- if ((result = [proto_list->list[j]
- descriptionForInstanceMethod: aSel]))
- return result;
- }
- }
-
- return NULL;
-}
-
-- (struct objc_method_description *) descriptionForClassMethod:(SEL)aSel;
-{
- int i;
- struct objc_protocol_list* proto_list;
- const char* name = sel_get_name (aSel);
- struct objc_method_description *result;
-
- if (class_methods)
- for (i = 0; i < class_methods->count; i++)
- {
- if (!strcmp ((char*)class_methods->list[i].name, name))
- return &(class_methods->list[i]);
- }
-
- for (proto_list = protocol_list; proto_list; proto_list = proto_list->next)
- {
- size_t j;
- for (j=0; j < proto_list->count; j++)
- {
- if ((result = [proto_list->list[j]
- descriptionForClassMethod: aSel]))
- return result;
- }
- }
-
- return NULL;
-}
-
-- (unsigned) hash
-{
- /* Compute a hash of the protocol_name; use the same hash algorithm
- * that we use for class names; protocol names and class names are
- * somewhat similar types of string spaces.
- */
- int hash = 0, index;
-
- for (index = 0; protocol_name[index] != '\0'; index++)
- {
- hash = (hash << 4) ^ (hash >> 28) ^ protocol_name[index];
- }
-
- hash = (hash ^ (hash >> 10) ^ (hash >> 20));
-
- return hash;
-}
-
-/*
- * Equality between formal protocols is only formal (nothing to do
- * with actually checking the list of methods they have!). Two formal
- * Protocols are equal if and only if they have the same name.
- *
- * Please note (for comparisons with other implementations) that
- * checking the names is equivalent to checking that Protocol A
- * conforms to Protocol B and Protocol B conforms to Protocol A,
- * because this happens iff they have the same name. If they have
- * different names, A conforms to B if and only if A includes B, but
- * the situation where A includes B and B includes A is a circular
- * dependency between Protocols which is forbidden by the compiler, so
- * A conforms to B and B conforms to A with A and B having different
- * names is an impossible case.
- */
- (BOOL) isEqual: (id)obj
{
- if (obj == self)
- return YES;
-
- if ([obj isKindOf: [Protocol class]])
- {
- if (strcmp (protocol_name, ((Protocol *)obj)->protocol_name) == 0)
- return YES;
- }
-
- return NO;
+ return protocol_isEqual (self, obj);
}
@end
-