4c68a10264
1. CanHandleGZip static method 2. code cleanup 3. 2.4 compatibility mode git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26713 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: zstream.h
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// Purpose: Memory stream classes
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// Author: Guilhem Lavaux
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// Modified by: Mike Wetherell
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// Created: 11/07/98
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// RCS-ID: $Id$
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// Copyright: (c) Guilhem Lavaux
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_WXZSTREAM_H__
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#define _WX_WXZSTREAM_H__
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#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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#pragma interface "zstream.h"
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#endif
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#include "wx/defs.h"
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#if wxUSE_ZLIB && wxUSE_STREAMS
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#include "wx/stream.h"
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// Compression level
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enum {
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wxZ_DEFAULT_COMPRESSION = -1,
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wxZ_NO_COMPRESSION = 0,
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wxZ_BEST_SPEED = 1,
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wxZ_BEST_COMPRESSION = 9
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};
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// Flags
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enum {
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#if WXWIN_COMPATIBILITY_2_4
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wxZLIB_24COMPATIBLE = 4, // read v2.4.x data without error
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#endif
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wxZLIB_NO_HEADER = 0, // raw deflate stream, no header or checksum
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wxZLIB_ZLIB = 1, // zlib header and checksum
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wxZLIB_GZIP = 2, // gzip header and checksum, requires zlib 1.2.1+
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wxZLIB_AUTO = 3 // autodetect header zlib or gzip
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};
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class WXDLLIMPEXP_BASE wxZlibInputStream: public wxFilterInputStream {
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public:
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wxZlibInputStream(wxInputStream& stream, int flags = wxZLIB_AUTO);
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virtual ~wxZlibInputStream();
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char Peek() { return wxInputStream::Peek(); }
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size_t GetSize() const { return wxInputStream::GetSize(); }
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static bool CanHandleGZip();
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protected:
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size_t OnSysRead(void *buffer, size_t size);
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off_t OnSysTell() const { return m_pos; }
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protected:
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size_t m_z_size;
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unsigned char *m_z_buffer;
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struct z_stream_s *m_inflate;
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off_t m_pos;
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#if WXWIN_COMPATIBILITY_2_4
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bool m_24compatibilty;
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#endif
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DECLARE_NO_COPY_CLASS(wxZlibInputStream)
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};
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class WXDLLIMPEXP_BASE wxZlibOutputStream: public wxFilterOutputStream {
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public:
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wxZlibOutputStream(wxOutputStream& stream, int level = -1, int flags = wxZLIB_ZLIB);
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virtual ~wxZlibOutputStream();
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void Sync() { DoFlush(false); }
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size_t GetSize() const { return (size_t)m_pos; }
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static bool CanHandleGZip();
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protected:
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size_t OnSysWrite(const void *buffer, size_t size);
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off_t OnSysTell() const { return m_pos; }
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virtual void DoFlush(bool final);
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protected:
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size_t m_z_size;
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unsigned char *m_z_buffer;
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struct z_stream_s *m_deflate;
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off_t m_pos;
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DECLARE_NO_COPY_CLASS(wxZlibOutputStream)
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};
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#endif
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// wxUSE_ZLIB && wxUSE_STREAMS
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#endif
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// _WX_WXZSTREAM_H__
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