2 Copyright (C) 2000-2005 SKYRIX Software AG
4 This file is part of SOPE.
6 SOPE is free software; you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 SOPE is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
14 License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with SOPE; see the file COPYING. If not, write to the
18 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 #ifndef __NGExtensions_NGStack_H__
23 #define __NGExtensions_NGStack_H__
25 #import <Foundation/NSObject.h>
26 #import <Foundation/NSException.h>
27 #import <Foundation/NSArray.h>
31 @protocol NGStack < NSObject >
35 - (unsigned int)stackPointer;
36 - (unsigned int)count;
41 - (void)push:(id)_obj;
48 - (NSEnumerator *)topDownEnumerator;
49 - (NSEnumerator *)bottomUpEnumerator;
53 @interface NGStack : NSObject < NGStack, NSCoding, NSCopying >
56 unsigned int stackPointer;
57 unsigned int capacity;
61 + (id)stackWithCapacity:(unsigned int)_capacity;
63 + (id)stackWithArray:(NSArray *)_array;
65 - (id)initWithCapacity:(unsigned int)_capacity; // designated initializer
66 - (id)initWithArray:(NSArray *)_array;
70 - (unsigned int)capacity;
72 - (unsigned int)stackPointer;
73 - (unsigned int)count;
79 - (id)elementAtBottom;
80 - (NSEnumerator *)topDownEnumerator;
81 - (NSEnumerator *)bottomUpEnumerator;
85 - (void)push:(id)_obj;
91 - (NSArray *)toArray; // array representation, bottom element first
95 @interface NGStackException : NSException
98 @interface NSMutableArray(Stack) < NGStack >
101 #endif /* __NGExtensions_NGStack_H__ */