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- /* This file contains the implementation of class Protocol.
- Copyright (C) 1993 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC 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)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- 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 GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 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. */
-
- #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];
- };
-
-
- @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
- {
- int i;
- struct objc_protocol_list* proto_list;
-
- 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;
-
- 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)
- {
- for (i=0; i < proto_list->count; i++)
- {
- if ((result = [proto_list->list[i]
- 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;
-
- 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)
- {
- for (i=0; i < proto_list->count; i++)
- {
- if ((result = [proto_list->list[i]
- descriptionForClassMethod: aSel]))
- return result;
- }
- }
-
- return NULL;
- }
-
- @end
-