/////////////////////////////////////////////////////////////////////////////
-// Name: zstream.h
+// Name: wx/zstream.h
// Purpose: Memory stream classes
// Author: Guilhem Lavaux
-// Modified by:
+// 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__
-#ifdef __GNUG__
-#pragma interface
-#endif
+#include "wx/defs.h"
+
+#if wxUSE_ZLIB && wxUSE_STREAMS
+
+#include "wx/stream.h"
+#include "wx/versioninfo.h"
+
+// Compression level
+enum wxZlibCompressionLevels {
+ wxZ_DEFAULT_COMPRESSION = -1,
+ wxZ_NO_COMPRESSION = 0,
+ wxZ_BEST_SPEED = 1,
+ wxZ_BEST_COMPRESSION = 9
+};
-#include <wx/stream.h>
+// Flags
+enum wxZLibFlags {
+ wxZLIB_NO_HEADER = 0, // raw deflate stream, no header or checksum
+ wxZLIB_ZLIB = 1, // zlib header and checksum
+ wxZLIB_GZIP = 2, // gzip header and checksum, requires zlib 1.2.1+
+ wxZLIB_AUTO = 3 // autodetect header zlib or gzip
+};
-class wxZlibInputStream: public wxFilterInputStream {
+class WXDLLIMPEXP_BASE wxZlibInputStream: public wxFilterInputStream {
public:
- wxZlibInputStream(wxInputStream& stream);
+ wxZlibInputStream(wxInputStream& stream, int flags = wxZLIB_AUTO);
+ wxZlibInputStream(wxInputStream *stream, int flags = wxZLIB_AUTO);
virtual ~wxZlibInputStream();
+ char Peek() { return wxInputStream::Peek(); }
+ wxFileOffset GetLength() const { return wxInputStream::GetLength(); }
+
+ static bool CanHandleGZip();
+
+ bool SetDictionary(const char *data, const size_t datalen);
+ bool SetDictionary(const wxMemoryBuffer &buf);
+
protected:
size_t OnSysRead(void *buffer, size_t size);
+ wxFileOffset OnSysTell() const { return m_pos; }
+
+ private:
+ void Init(int flags);
protected:
size_t m_z_size;
unsigned char *m_z_buffer;
struct z_stream_s *m_inflate;
+ wxFileOffset m_pos;
+
+ wxDECLARE_NO_COPY_CLASS(wxZlibInputStream);
};
-class wxZlibOutputStream: public wxFilterOutputStream {
+class WXDLLIMPEXP_BASE wxZlibOutputStream: public wxFilterOutputStream {
public:
- wxZlibOutputStream(wxOutputStream& stream);
- virtual ~wxZlibOutputStream();
+ wxZlibOutputStream(wxOutputStream& stream, int level = -1, int flags = wxZLIB_ZLIB);
+ wxZlibOutputStream(wxOutputStream *stream, int level = -1, int flags = wxZLIB_ZLIB);
+ virtual ~wxZlibOutputStream() { Close(); }
+
+ void Sync() { DoFlush(false); }
+ bool Close();
+ wxFileOffset GetLength() const { return m_pos; }
- void Sync();
+ static bool CanHandleGZip();
+
+ bool SetDictionary(const char *data, const size_t datalen);
+ bool SetDictionary(const wxMemoryBuffer &buf);
protected:
size_t OnSysWrite(const void *buffer, size_t size);
+ wxFileOffset OnSysTell() const { return m_pos; }
+
+ virtual void DoFlush(bool final);
+
+ private:
+ void Init(int level, int flags);
protected:
size_t m_z_size;
unsigned char *m_z_buffer;
struct z_stream_s *m_deflate;
+ wxFileOffset m_pos;
+
+ wxDECLARE_NO_COPY_CLASS(wxZlibOutputStream);
+};
+
+class WXDLLIMPEXP_BASE wxZlibClassFactory: public wxFilterClassFactory
+{
+public:
+ wxZlibClassFactory();
+
+ wxFilterInputStream *NewStream(wxInputStream& stream) const
+ { return new wxZlibInputStream(stream); }
+ wxFilterOutputStream *NewStream(wxOutputStream& stream) const
+ { return new wxZlibOutputStream(stream, -1); }
+ wxFilterInputStream *NewStream(wxInputStream *stream) const
+ { return new wxZlibInputStream(stream); }
+ wxFilterOutputStream *NewStream(wxOutputStream *stream) const
+ { return new wxZlibOutputStream(stream, -1); }
+
+ const wxChar * const *GetProtocols(wxStreamProtocolType type
+ = wxSTREAM_PROTOCOL) const;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxZlibClassFactory)
};
+class WXDLLIMPEXP_BASE wxGzipClassFactory: public wxFilterClassFactory
+{
+public:
+ wxGzipClassFactory();
+
+ wxFilterInputStream *NewStream(wxInputStream& stream) const
+ { return new wxZlibInputStream(stream); }
+ wxFilterOutputStream *NewStream(wxOutputStream& stream) const
+ { return new wxZlibOutputStream(stream, -1); }
+ wxFilterInputStream *NewStream(wxInputStream *stream) const
+ { return new wxZlibInputStream(stream); }
+ wxFilterOutputStream *NewStream(wxOutputStream *stream) const
+ { return new wxZlibOutputStream(stream, -1); }
+
+ const wxChar * const *GetProtocols(wxStreamProtocolType type
+ = wxSTREAM_PROTOCOL) const;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxGzipClassFactory)
+};
+
+WXDLLIMPEXP_BASE wxVersionInfo wxGetZlibVersionInfo();
+
#endif
+ // wxUSE_ZLIB && wxUSE_STREAMS
+
+#endif
+ // _WX_WXZSTREAM_H__
+