buffer.h
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef _BUFFER_H_
- #define _BUFFER_H_
- class Buffer {
- public:
- Buffer();
- virtual ~Buffer();
- Byte* base;
- Byte* limit;
- Byte* data;
- Byte* space;
- int refcount;
- int init(int s);
- virtual void ensure_space(int required) = 0;
- int count();
- int space_count();
- int size();
- int used();
- };
- class WrapBuffer : public Buffer {
- public:
- void ensure(int required);
- void ensure_space(int required);
- };
- class GrowBuffer : public Buffer {
- public:
- void grow(int s);
- void ensure_space(int required);
- };
- inline int
- Buffer::count() {
- return space - data;
- }
- inline int
- Buffer::space_count() {
- return limit - space;
- }
- inline int
- Buffer::size()
- {
- return limit - base;
- }
- inline int
- Buffer::used()
- {
- return space - base;
- }
- inline int
- Buffer::init(int size) {
- base = data = space = new Byte[size];
- if (!space)
- return -1;
- limit = base + size;
- return 0;
- }
- #endif/*_BUFFER_H_*/