+class WXDLLEXPORT wxFilterInputStream: public wxInputStream
+{
+public:
+ wxFilterInputStream();
+ wxFilterInputStream(wxInputStream& stream);
+ ~wxFilterInputStream();
+
+ char Peek() { return m_parent_i_stream->Peek(); }
+
+ size_t GetSize() const { return m_parent_i_stream->GetSize(); }
+
+protected:
+ wxInputStream *m_parent_i_stream;
+};
+
+class WXDLLEXPORT wxFilterOutputStream: public wxOutputStream
+{
+public:
+ wxFilterOutputStream();
+ wxFilterOutputStream(wxOutputStream& stream);
+ ~wxFilterOutputStream();
+
+ size_t GetSize() const { return m_parent_o_stream->GetSize(); }
+
+protected:
+ wxOutputStream *m_parent_o_stream;
+};
+
+// ---------------------------------------------------------------------------
+// Stream buffer
+// ---------------------------------------------------------------------------
+
+class WXDLLEXPORT wxStreamBuffer
+{
+public:
+ typedef enum {
+ read = 0, write, read_write
+ } BufMode;
+
+ wxStreamBuffer(wxStreamBase& stream, BufMode mode);
+ wxStreamBuffer(BufMode mode);
+ wxStreamBuffer(const wxStreamBuffer& buf);
+ ~wxStreamBuffer();
+
+ // Filtered IO
+ size_t Read(void *buffer, size_t size);
+ size_t Read(wxStreamBuffer *buf);
+ size_t Write(const void *buffer, size_t size);
+ size_t Write(wxStreamBuffer *buf);
+
+ char Peek();
+ char GetChar();
+ void PutChar(char c);
+ off_t Tell() const;
+ off_t Seek(off_t pos, wxSeekMode mode);
+
+ // Buffer control
+ void ResetBuffer();
+ void SetBufferIO(char *buffer_start, char *buffer_end);
+ void SetBufferIO(size_t bufsize);
+ char *GetBufferStart() const { return m_buffer_start; }
+ char *GetBufferEnd() const { return m_buffer_end; }
+ char *GetBufferPos() const { return m_buffer_pos; }
+ off_t GetIntPosition() const { return m_buffer_pos-m_buffer_start; }
+ void SetIntPosition(off_t pos) { m_buffer_pos = m_buffer_start+pos; }
+ size_t GetLastAccess() const { return m_buffer_end-m_buffer_start; }
+
+ void Fixed(bool fixed) { m_fixed = fixed; }
+ void Flushable(bool f) { m_flushable = f; }
+
+ bool FlushBuffer();
+ bool FillBuffer();
+ size_t GetDataLeft();
+
+ // Misc.
+ wxStreamBase *Stream() { return m_stream; }
+
+protected:
+ void GetFromBuffer(void *buffer, size_t size);
+ void PutToBuffer(const void *buffer, size_t size);
+
+ char *m_buffer_start, *m_buffer_end, *m_buffer_pos;
+ size_t m_buffer_size;
+
+ bool m_fixed, m_flushable;
+
+ wxStreamBase *m_stream;
+ BufMode m_mode;
+ bool m_destroybuf, m_destroystream;
+};
+
+// ---------------------------------------------------------------------------
+// wxBufferedStreams
+// ---------------------------------------------------------------------------
+
+class wxBufferedInputStream: public wxFilterInputStream
+{
+public:
+ wxBufferedInputStream(wxInputStream& stream);
+ ~wxBufferedInputStream();