79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/lzmastream.h
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// Purpose: Filters streams using LZMA(2) compression
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// Author: Vadim Zeitlin
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// Created: 2018-03-29
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// Copyright: (c) 2018 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_LZMASTREAM_H_
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#define _WX_LZMASTREAM_H_
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#include "wx/defs.h"
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#if wxUSE_LIBLZMA && wxUSE_STREAMS
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#include "wx/stream.h"
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#include "wx/versioninfo.h"
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namespace wxPrivate
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{
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// Private wrapper for lzma_stream struct.
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struct wxLZMAStream;
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// Common part of input and output LZMA streams: this is just an implementation
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// detail and is not part of the public API.
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class WXDLLIMPEXP_BASE wxLZMAData
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{
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protected:
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wxLZMAData();
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~wxLZMAData();
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wxLZMAStream* m_stream;
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wxUint8* m_streamBuf;
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wxFileOffset m_pos;
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wxDECLARE_NO_COPY_CLASS(wxLZMAData);
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};
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} // namespace wxPrivate
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// ----------------------------------------------------------------------------
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// Filter for decompressing data compressed using LZMA
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxLZMAInputStream : public wxFilterInputStream,
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private wxPrivate::wxLZMAData
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{
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public:
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explicit wxLZMAInputStream(wxInputStream& stream)
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: wxFilterInputStream(stream)
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{
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Init();
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}
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explicit wxLZMAInputStream(wxInputStream* stream)
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: wxFilterInputStream(stream)
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{
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Init();
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}
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char Peek() wxOVERRIDE { return wxInputStream::Peek(); }
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wxFileOffset GetLength() const wxOVERRIDE { return wxInputStream::GetLength(); }
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protected:
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size_t OnSysRead(void *buffer, size_t size) wxOVERRIDE;
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wxFileOffset OnSysTell() const wxOVERRIDE { return m_pos; }
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private:
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void Init();
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};
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WXDLLIMPEXP_BASE wxVersionInfo wxGetLibLZMAVersionInfo();
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#endif // wxUSE_LIBLZMA && wxUSE_STREAMS
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#endif // _WX_LZMASTREAM_H_
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