http://code.google.com/p/rpcs3/source/detail?r=44

wxWidgets/include/wx/zstream.h

@@ -0,0 +1,146 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/zstream.h
+// Purpose:     Memory stream classes
+// Author:      Guilhem Lavaux
+// Modified by: Mike Wetherell
+// Created:     11/07/98
+// RCS-ID:      $Id: zstream.h 54688 2008-07-18 08:06:44Z MW $
+// Copyright:   (c) Guilhem Lavaux
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+#ifndef _WX_WXZSTREAM_H__
+#define _WX_WXZSTREAM_H__
+
+#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 {
+#if WXWIN_COMPATIBILITY_2_4
+    wxZLIB_24COMPATIBLE = 4, // read v2.4.x data without error
+#endif
+    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 WXDLLIMPEXP_BASE wxZlibInputStream: public wxFilterInputStream {
+ public:
+  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();
+
+ 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;
+#if WXWIN_COMPATIBILITY_2_4
+  bool m_24compatibilty;
+#endif
+
+  DECLARE_NO_COPY_CLASS(wxZlibInputStream)
+};
+
+class WXDLLIMPEXP_BASE wxZlibOutputStream: public wxFilterOutputStream {
+ public:
+  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; }
+
+  static bool CanHandleGZip();
+
+ 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;
+
+  DECLARE_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, wxZLIB_GZIP); }
+    wxFilterInputStream *NewStream(wxInputStream *stream) const
+        { return new wxZlibInputStream(stream); }
+    wxFilterOutputStream *NewStream(wxOutputStream *stream) const
+        { return new wxZlibOutputStream(stream, -1, wxZLIB_GZIP); }
+
+    const wxChar * const *GetProtocols(wxStreamProtocolType type
+                                       = wxSTREAM_PROTOCOL) const;
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxGzipClassFactory)
+};
+
+#endif
+  // wxUSE_ZLIB && wxUSE_STREAMS
+
+#endif
+   // _WX_WXZSTREAM_H__
+