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NSObject_ClassTree.m
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NSObject_ClassTree.m
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/*
Copyright (C) 1999 Free Software Foundation, Inc.
Written by: Karl Kraft <karl@nfox.com>
Date: Sep 99
This file is part of nfmake - a utility for building GNUstep programs
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.
*/
#import "NSObject.h"
#if defined(NeXT_RUNTIME)
#import <objc/hashtable2.h>
#import <objc/objc-class.h>
#import <objc/objc-runtime.h>
#elif defined(GNU_RUNTIME)
#import <objc/objc.h>
#else
#error You must define which runtime you are using
#endif
@implementation NSObject(ClassTree)
+ (NSMutableArray *)loadedSubclassArray
{
#if defined(GNU_RUNTIME)
void *es = NULL;
#elif defined (NeXT_RUNTIME)
NXHashTable *classes = objc_getClasses();
NXHashState state = NXInitHashState(classes);
#else
#error You must define what runtime you are using
#endif
NSMutableArray *myArray=[[[NSMutableArray alloc] init] autorelease];
Class testClass=nil;
#if defined(GNU_RUNTIME)
while ((testClass = objc_next_class(&es))) {
#elif define (NeXT_RUNTIME)
while ( NXNextHashState(classes, &state, (void **)&testClass) ){
#else
#error What runtime is this?
#endif
struct objc_class *upClass; // walks classes
upClass= testClass;
while ((upClass = upClass->super_class)) { // keep walking the tree until supercalss is nill
if (upClass == upClass->super_class) break; // break on circular links
if (upClass==self) { // note that self is class object here
[myArray addObject:testClass];
break;
}
}
}
return myArray;
}
@end