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[wxWidgets.git] / include / wx / zstream.h

diff --git a/include/wx/zstream.h b/include/wx/zstream.h
index cab4f71e07bd595adfd3d5ac30b9a9b27768e4b3..d6c473080ba4c73a43b8f17d72f7d6e700d4e5fa 100644 (file)
--- a/include/wx/zstream.h
+++ b/include/wx/zstream.h
@@ -1,8 +1,8 @@
 /////////////////////////////////////////////////////////////////////////////
-// 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
@@ -11,40 +11,130 @@
 #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/stream.h"
+
+// Compression level
+enum wxZlibCompressionLevels {
+    wxZ_DEFAULT_COMPRESSION = -1,
+    wxZ_NO_COMPRESSION = 0,
+    wxZ_BEST_SPEED = 1,
+    wxZ_BEST_COMPRESSION = 9
+};
 
-class WXDLLEXPORT wxZlibInputStream: public wxFilterInputStream {
+// 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 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();
+
  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;
+
+  DECLARE_NO_COPY_CLASS(wxZlibInputStream)
 };
 
-class WXDLLEXPORT 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();
 
  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); }
+    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)
 };
 
 #endif
+  // wxUSE_ZLIB && wxUSE_STREAMS
+
+#endif
+   // _WX_WXZSTREAM_H__
+