Add the 3.3.3 sources for class-dump.

class-dump/src/CDTopoSortNode.m

+// -*- mode: ObjC -*-
+
+//  This file is part of class-dump, a utility for examining the Objective-C segment of Mach-O files.
+//  Copyright (C) 1997-1998, 2000-2001, 2004-2010 Steve Nygard.
+
+#import "CDTopoSortNode.h"
+
+#import "NSObject-CDExtensions.h"
+
+@implementation CDTopoSortNode
+
+- (id)initWithObject:(id <CDTopologicalSort>)anObject;
+{
+    if ([super init] == nil)
+        return nil;
+
+    sortableObject = [anObject retain];
+    dependancies = [[NSMutableSet alloc] init];
+    color = CDWhiteNodeColor;
+
+    [self addDependanciesFromArray:[sortableObject dependancies]];
+
+    return self;
+}
+
+- (void)dealloc;
+{
+    [sortableObject release];
+    [dependancies release];
+
+    [super dealloc];
+}
+
+- (NSString *)identifier;
+{
+    return [sortableObject identifier];
+}
+
+- (id <CDTopologicalSort>)sortableObject;
+{
+    return sortableObject;
+}
+
+- (NSArray *)dependancies;
+{
+    return [dependancies allObjects];
+}
+
+- (void)addDependancy:(NSString *)anIdentifier;
+{
+    [dependancies addObject:anIdentifier];
+}
+
+- (void)removeDependancy:(NSString *)anIdentifier;
+{
+    [dependancies removeObject:anIdentifier];
+}
+
+- (void)addDependanciesFromArray:(NSArray *)identifiers;
+{
+    [self performSelector:@selector(addDependancy:) withObjectsFromArray:identifiers];
+    //[identifiers makeObject:self performSelector:@selector(addDependancy:)];
+}
+
+- (CDNodeColor)color;
+{
+    return color;
+}
+
+- (void)setColor:(CDNodeColor)newColor;
+{
+    color = newColor;
+}
+
+- (NSString *)description;
+{
+    return [NSString stringWithFormat:@"%@ (%d) depends on %@", [self identifier], color, [[dependancies allObjects] componentsJoinedByString:@", "]];
+}
+
+- (NSComparisonResult)ascendingCompareByIdentifier:(id)otherNode;
+{
+    return [[self identifier] compare:[otherNode identifier]];
+}
+
+- (void)topologicallySortNodes:(NSDictionary *)nodesByIdentifier intoArray:(NSMutableArray *)sortedArray;
+{
+    NSArray *dependantIdentifiers;
+    CDTopoSortNode *aNode;
+
+    dependantIdentifiers = [self dependancies];
+    for (NSString *anIdentifier in dependantIdentifiers) {
+        aNode = [nodesByIdentifier objectForKey:anIdentifier];
+        if ([aNode color] == CDWhiteNodeColor) {
+            [aNode setColor:CDGrayNodeColor];
+            [aNode topologicallySortNodes:nodesByIdentifier intoArray:sortedArray];
+        } else if ([aNode color] == CDGrayNodeColor) {
+            NSLog(@"Warning: Possible circular reference? %@ -> %@", [self identifier], [aNode identifier]);
+        }
+    }
+
+    [sortedArray addObject:[self sortableObject]];
+    [self setColor:CDBlackNodeColor];
+}
+
+@end