82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2023
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
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* street, Riga, Latvia, EU, LV-1050.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#pragma once
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#include <iostream>
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#include <list>
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#include "sector.h"
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#include "slist.h"
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#include "svector.h"
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namespace CFCPP
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{
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class StreamView : public IStream
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{
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public:
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StreamView(const SVector<Sector> §orChain, _INT32 sectorSize, Stream stream);
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StreamView(const SVector<Sector> §orChain, _INT32 sectorSize, _INT64 length,
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SList<Sector> &availableSectors, Stream stream, bool isFatStream = false);
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_INT64 tell() override;
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_INT64 seek(_INT64 offset, std::ios_base::seekdir mode = std::ios::beg) override;
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_INT64 read(char *buffer, _INT64 count) override;
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void write(const char *buffer, _INT64 count) override;
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void flush() override {}
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void close() override;
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bool isError() override;
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_INT64 getPosition() const;
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void SetLength(_INT64 value);
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_INT64 getLength() const;
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SVector<Sector>& BaseSectorChain();
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_INT32 ReadInt32();
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void WriteInt32(_INT32 val);
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private:
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void adjustLength(_INT64 value);
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void adjustLength(_INT64 value, SList<Sector> &availableSectors);
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private:
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_INT32 sectorSize = 0;
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_INT64 length = 0;
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SVector<Sector> sectorChain;
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bool isFatStream = false;
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_INT32 buf = 0;
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Stream stream;
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_INT64 position = 0;
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SList<Sector> freeSectors;
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};
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}
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