301deecc27
862130 wxZlibInput/OutputStream gzip support git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24952 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
/////////////////////////////////////////////////////////////////////////////
|
|
// Name: zstream.h
|
|
// Purpose: Memory stream classes
|
|
// Author: Guilhem Lavaux
|
|
// Modified by: Mike Wetherell
|
|
// Created: 11/07/98
|
|
// RCS-ID: $Id$
|
|
// Copyright: (c) Guilhem Lavaux
|
|
// Licence: wxWindows licence
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
#ifndef _WX_WXZSTREAM_H__
|
|
#define _WX_WXZSTREAM_H__
|
|
|
|
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
|
|
#pragma interface "zstream.h"
|
|
#endif
|
|
|
|
#include "wx/defs.h"
|
|
|
|
#if wxUSE_ZLIB && wxUSE_STREAMS
|
|
|
|
#include "wx/stream.h"
|
|
|
|
// Compression level
|
|
enum {
|
|
wxZ_DEFAULT_COMPRESSION = -1,
|
|
wxZ_NO_COMPRESSION = 0,
|
|
wxZ_BEST_SPEED = 1,
|
|
wxZ_BEST_COMPRESSION = 9
|
|
};
|
|
|
|
// Flags
|
|
enum {
|
|
wxZLIB_NO_HEADER = 1, // raw deflate stream, no header or checksum
|
|
wxZLIB_ZLIB = 2, // zlib header and checksum
|
|
wxZLIB_GZIP = 3 // gzip header and checksum, requires zlib 1.2+
|
|
};
|
|
|
|
class WXDLLIMPEXP_BASE wxZlibInputStream: public wxFilterInputStream {
|
|
public:
|
|
wxZlibInputStream(wxInputStream& stream, int flags = wxZLIB_ZLIB | wxZLIB_GZIP);
|
|
virtual ~wxZlibInputStream();
|
|
|
|
char Peek() { return wxInputStream::Peek(); }
|
|
size_t GetSize() const { return wxInputStream::GetSize(); }
|
|
|
|
protected:
|
|
size_t OnSysRead(void *buffer, size_t size);
|
|
off_t OnSysTell() const { return m_pos; }
|
|
|
|
protected:
|
|
size_t m_z_size;
|
|
unsigned char *m_z_buffer;
|
|
struct z_stream_s *m_inflate;
|
|
off_t m_pos;
|
|
|
|
DECLARE_NO_COPY_CLASS(wxZlibInputStream)
|
|
};
|
|
|
|
class WXDLLIMPEXP_BASE wxZlibOutputStream: public wxFilterOutputStream {
|
|
public:
|
|
wxZlibOutputStream(wxOutputStream& stream, int level = -1, int flags = wxZLIB_ZLIB);
|
|
virtual ~wxZlibOutputStream();
|
|
|
|
void Sync() { DoFlush(false); }
|
|
size_t GetSize() const { return (size_t)m_pos; }
|
|
|
|
protected:
|
|
size_t OnSysWrite(const void *buffer, size_t size);
|
|
off_t OnSysTell() const { return m_pos; }
|
|
|
|
virtual void DoFlush(bool final);
|
|
|
|
protected:
|
|
size_t m_z_size;
|
|
unsigned char *m_z_buffer;
|
|
struct z_stream_s *m_deflate;
|
|
off_t m_pos;
|
|
|
|
DECLARE_NO_COPY_CLASS(wxZlibOutputStream)
|
|
};
|
|
|
|
#endif
|
|
// wxUSE_ZLIB && wxUSE_STREAMS
|
|
|
|
#endif
|
|
// _WX_WXZSTREAM_H__
|
|
|