Initial revision

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@1 72102866-910b-0410-8b05-ffd578937521

Source/LinkedListNode.m

@@ -0,0 +1,97 @@
+/* Implementation for Objective-C LinkedListNode object
+   Copyright (C) 1993,1994 Free Software Foundation, Inc.
+
+   Written by:  R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
+   Date: May 1993
+
+   This file is part of the GNU Objective C Class Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/ 
+
+#include <objects/LinkedListNode.h>
+#include <objects/Coder.h>
+
+@implementation LinkedListNode
+
++ initialize
+{
+  if (self == [LinkedListNode class])
+    [self setVersion:0];	/* beta release */
+  return self;
+}
+
+- init
+{
+  [super init];
+  _next = _prev = nil;
+  return self;
+}
+
+- (void) encodeWithCoder: (Coder*)aCoder
+{
+  [super encodeWithCoder:aCoder];
+  [aCoder encodeObjectReference:_next withName:"Next LinkedList Node"];
+  [aCoder encodeObjectReference:_prev withName:"Prev LinkedList Node"];
+}
+
++ newWithCoder: (Coder*)aCoder
+{
+  LinkedListNode *n = [super newWithCoder:aCoder];
+  [aCoder decodeObjectAt:&(n->_next) withName:NULL];
+  [aCoder decodeObjectAt:&(n->_prev) withName:NULL];
+  return n;
+}
+
+- write: (TypedStream*)aStream
+{
+  [super write:aStream];
+  objc_write_object_reference(aStream, _next);
+  objc_write_object_reference(aStream, _prev);
+  return self;
+}
+
+- read: (TypedStream*)aStream
+{
+  [super read:aStream];
+  objc_read_object(aStream, &_next);
+  objc_read_object(aStream, &_prev);
+  return self;
+}
+
+- (id <LinkedListComprising>) nextLink
+{
+  return _next;
+}
+
+- (id <LinkedListComprising>) prevLink
+{
+  return _prev;
+}
+
+- setNextLink: (id <LinkedListComprising>)aLink
+{
+  _next = aLink;
+  return self;
+}
+
+- setPrevLink: (id <LinkedListComprising>)aLink
+{
+  _prev = aLink;
+  return self;
+}
+
+@end
+