corrected handling of timeouts in wxConditionInternal::WaitTimeout(): check for wxSEM...

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

diff --git a/include/wx/stream.h b/include/wx/stream.h
index 488d1905dca86f30cbceab17eb1deebc93a353bd..0c91e975f3c91950ddd1feb792f1f465fea3cca3 100644 (file)
--- a/include/wx/stream.h
+++ b/include/wx/stream.h
@@ -1,21 +1,17 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        wx/stream.h
 /////////////////////////////////////////////////////////////////////////////
 // Name:        wx/stream.h

-// Purpose:     "wxWindows stream" base classes
-// Author:      Guilhem Lavaux
+// Purpose:     stream classes
+// Author:      Guilhem Lavaux, Guillermo Rodriguez Garcia, Vadim Zeitlin

 // Modified by:
 // Created:     11/07/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Guilhem Lavaux
 // Modified by:
 // Created:     11/07/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Guilhem Lavaux

-// Licence:     wxWindows license
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_WXSTREAM_H__
 #define _WX_WXSTREAM_H__
 
 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_WXSTREAM_H__
 #define _WX_WXSTREAM_H__
 

-#if defined(__GNUG__) && !defined(__APPLE__)
-#pragma interface "stream.h"
-#endif
-

 #include "wx/defs.h"
 
 #if wxUSE_STREAMS
 #include "wx/defs.h"
 
 #if wxUSE_STREAMS


@@ -23,43 +19,38 @@
 #include <stdio.h>
 #include "wx/object.h"
 #include "wx/string.h"
 #include <stdio.h>
 #include "wx/object.h"
 #include "wx/string.h"

-#include "wx/filefn.h"  // for off_t, wxInvalidOffset and wxSeekMode
+#include "wx/filefn.h"  // for wxFileOffset, wxInvalidOffset and wxSeekMode

 
 

-class WXDLLEXPORT wxStreamBase;
-class WXDLLEXPORT wxInputStream;
-class WXDLLEXPORT wxOutputStream;
+class WXDLLIMPEXP_BASE wxStreamBase;
+class WXDLLIMPEXP_BASE wxInputStream;
+class WXDLLIMPEXP_BASE wxOutputStream;

 
 typedef wxInputStream& (*__wxInputManip)(wxInputStream&);
 typedef wxOutputStream& (*__wxOutputManip)(wxOutputStream&);
 
 
 typedef wxInputStream& (*__wxInputManip)(wxInputStream&);
 typedef wxOutputStream& (*__wxOutputManip)(wxOutputStream&);
 

-WXDLLEXPORT wxOutputStream& wxEndL(wxOutputStream& o_stream);
+WXDLLIMPEXP_BASE wxOutputStream& wxEndL(wxOutputStream& o_stream);

 
 

-// ---------------------------------------------------------------------------
-// wxStream: base classes
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------

 
 enum wxStreamError
 {
 
 enum wxStreamError
 {

-    wxSTREAM_NO_ERROR = 0,
-    wxSTREAM_NO_ERR = wxSTREAM_NO_ERROR,
-    wxSTREAM_NOERROR = wxSTREAM_NO_ERROR,
-
-    wxSTREAM_EOF,
-
-    wxSTREAM_WRITE_ERROR,
-    wxSTREAM_WRITE_ERR = wxSTREAM_WRITE_ERROR,
-
-    wxSTREAM_READ_ERROR,
-    wxSTREAM_READ_ERR = wxSTREAM_READ_ERROR
+    wxSTREAM_NO_ERROR = 0,      // stream is in good state
+    wxSTREAM_EOF,               // EOF reached in Read() or similar
+    wxSTREAM_WRITE_ERROR,       // generic write error
+    wxSTREAM_READ_ERROR         // generic read error

 };
 
 };
 

-// compatibility
-#define wxStream_NOERROR    wxSTREAM_NOERROR
-#define wxStream_EOF        wxSTREAM_EOF
-#define wxStream_WRITE_ERR  wxSTREAM_WRITE_ERROR
-#define wxStream_READ_ERR   wxSTREAM_READ_ERROR
+// ============================================================================
+// base stream classes: wxInputStream and wxOutputStream
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// wxStreamBase: common (but non virtual!) base for all stream classes
+// ---------------------------------------------------------------------------

 
 

-class WXDLLEXPORT wxStreamBase
+class WXDLLIMPEXP_BASE wxStreamBase

 {
 public:
     wxStreamBase();
 {
 public:
     wxStreamBase();


@@ -67,80 +58,181 @@ public:
 
     // error testing
     wxStreamError GetLastError() const { return m_lasterror; }
 
     // error testing
     wxStreamError GetLastError() const { return m_lasterror; }

-    bool IsOk() const { return LastError() == wxSTREAM_NOERROR; }
-    bool operator!() const { return LastError() != wxSTREAM_NOERROR; }
-
-    virtual size_t GetSize() const { return 0; }
-
-    // deprecated, for compatibility only
-    wxStreamError LastError() const { return m_lasterror; }
-    size_t StreamSize() const { return GetSize(); }
+    bool IsOk() const { return GetLastError() == wxSTREAM_NO_ERROR; }
+    bool operator!() const { return !IsOk(); }
+
+    // reset the stream state
+    void Reset() { m_lasterror = wxSTREAM_NO_ERROR; }
+
+    // this doesn't make sense for all streams, always test its return value
+    virtual size_t GetSize() const;
+    virtual wxFileOffset GetLength() const { return wxInvalidOffset; }
+
+    // returns true if the streams supports seeking to arbitrary offsets
+    virtual bool IsSeekable() const { return false; }
+
+    // Reserved for future use
+    virtual void ReservedStreamFunc1() {}
+    virtual void ReservedStreamFunc2() {}
+    virtual void ReservedStreamFunc3() {}
+    virtual void ReservedStreamFunc4() {}
+    virtual void ReservedStreamFunc5() {}
+    virtual void ReservedStreamFunc6() {}
+    virtual void ReservedStreamFunc7() {}
+    virtual void ReservedStreamFunc8() {}
+    virtual void ReservedStreamFunc9() {}

 
 protected:
 
 protected:

-    // VZ: these functions are really pure virtual and shouldn't be declared
-    //     in the base class because it creates ambiguties in stream classes
-    //     deriving from both wxInputStream and wxOutputStream
-#if 0
-    virtual size_t OnSysRead(void *buffer, size_t bufsize);
-    virtual size_t OnSysWrite(const void *buffer, size_t bufsize);
-#endif
+    virtual wxFileOffset OnSysSeek(wxFileOffset seek, wxSeekMode mode);
+    virtual wxFileOffset OnSysTell() const;

 
 

-    virtual off_t OnSysSeek(off_t seek, wxSeekMode mode);
-    virtual off_t OnSysTell() const;
+    size_t m_lastcount;
+    wxStreamError m_lasterror;

 
     friend class wxStreamBuffer;
 
 
     friend class wxStreamBuffer;
 

-    size_t m_lastcount;
-    wxStreamError m_lasterror;
+    DECLARE_NO_COPY_CLASS(wxStreamBase)

 };
 
 };
 

-class WXDLLEXPORT wxInputStream : /* virtual */ public wxStreamBase
+// ----------------------------------------------------------------------------
+// wxInputStream: base class for the input streams
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxInputStream : public wxStreamBase

 {
 public:
 {
 public:

+    // ctor and dtor, nothing exciting

     wxInputStream();
     virtual ~wxInputStream();
 
     wxInputStream();
     virtual ~wxInputStream();
 

-    // is the stream at EOF?
-    virtual bool Eof() const;

 
     // IO functions
 
     // IO functions

+    // ------------
+
+    // return a character from the stream without removing it, i.e. it will
+    // still be returned by the next call to GetC()
+    //
+    // blocks until something appears in the stream if necessary, if nothing
+    // ever does (i.e. EOF) LastRead() will return 0 (and the return value is
+    // undefined), otherwise 1

     virtual char Peek();
     virtual char Peek();

+
+    // return one character from the stream, blocking until it appears if
+    // necessary
+    //
+    // if EOF, return value is undefined and LastRead() will return 0 and not 1

     char GetC();
     char GetC();

+
+    // read at most the given number of bytes from the stream
+    //
+    // there are 2 possible situations here: either there is nothing at all in
+    // the stream right now in which case Read() blocks until something appears
+    // (use CanRead() to avoid this) or there is already some data available in
+    // the stream and then Read() doesn't block but returns just the data it
+    // can read without waiting for more
+    //
+    // in any case, if there are not enough bytes in the stream right now,
+    // LastRead() value will be less than size but greater than 0. If it is 0,
+    // it means that EOF has been reached.

     virtual wxInputStream& Read(void *buffer, size_t size);
     virtual wxInputStream& Read(void *buffer, size_t size);

-    wxInputStream& Read(wxOutputStream& stream_out);

 
 

-    // Position functions
-    virtual off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart);
-    virtual off_t TellI() const;
+    // copy the entire contents of this stream into streamOut, stopping only
+    // when EOF is reached or an error occurs
+    wxInputStream& Read(wxOutputStream& streamOut);
+
+
+    // status functions
+    // ----------------
+
+    // returns the number of bytes read by the last call to Read(), GetC() or
+    // Peek()
+    //
+    // this should be used to discover whether that call succeeded in reading
+    // all the requested data or not
+    virtual size_t LastRead() const { return wxStreamBase::m_lastcount; }
+
+    // returns true if some data is available in the stream right now, so that
+    // calling Read() wouldn't block
+    virtual bool CanRead() const;
+
+    // is the stream at EOF?
+    //
+    // note that this cannot be really implemented for all streams and
+    // CanRead() is more reliable than Eof()
+    virtual bool Eof() const;
+

 
 

-    // State functions
-    virtual size_t LastRead() { return wxStreamBase::m_lastcount; }
+    // write back buffer
+    // -----------------

 
 

-    // Ungetch
+    // put back the specified number of bytes into the stream, they will be
+    // fetched by the next call to the read functions
+    //
+    // returns the number of bytes really stuffed back

     size_t Ungetch(const void *buffer, size_t size);
     size_t Ungetch(const void *buffer, size_t size);

+
+    // put back the specified character in the stream
+    //
+    // returns true if ok, false on error

     bool Ungetch(char c);
 
     bool Ungetch(char c);
 

-    // Operators
+
+    // position functions
+    // ------------------
+
+    // move the stream pointer to the given position (if the stream supports
+    // it)
+    //
+    // returns wxInvalidOffset on error
+    virtual wxFileOffset SeekI(wxFileOffset pos, wxSeekMode mode = wxFromStart);
+
+    // return the current position of the stream pointer or wxInvalidOffset
+    virtual wxFileOffset TellI() const;
+
+
+    // stream-like operators
+    // ---------------------
+

     wxInputStream& operator>>(wxOutputStream& out) { return Read(out); }
     wxInputStream& operator>>(wxOutputStream& out) { return Read(out); }

-    wxInputStream& operator>>( __wxInputManip func) { return func(*this); }
+    wxInputStream& operator>>(__wxInputManip func) { return func(*this); }

 
 protected:
 
 protected:

-    // to be implemented in the derived classes (it should have been pure
-    // virtual)
-    virtual size_t OnSysRead(void *buffer, size_t bufsize);
+    // do read up to size bytes of data into the provided buffer
+    //
+    // this method should return 0 if EOF has been reached or an error occurred
+    // (m_lasterror should be set accordingly as well) or the number of bytes
+    // read
+    virtual size_t OnSysRead(void *buffer, size_t size) = 0;
+
+    // write-back buffer support
+    // -------------------------
+
+    // return the pointer to a buffer big enough to hold sizeNeeded bytes
+    char *AllocSpaceWBack(size_t sizeNeeded);

 
 

-    // Ungetch managers
+    // read up to size data from the write back buffer, return the number of
+    // bytes read
+    size_t GetWBack(void *buf, size_t size);
+
+    // write back buffer or NULL if none

     char *m_wback;
     char *m_wback;

+
+    // the size of the buffer

     size_t m_wbacksize;
     size_t m_wbacksize;

-    size_t m_wbackcur;

 
 

-    char *AllocSpaceWBack(size_t needed_size);
-    size_t GetWBack(void *buf, size_t bsize);
+    // the current position in the buffer
+    size_t m_wbackcur;

 
     friend class wxStreamBuffer;
 
     friend class wxStreamBuffer;

+
+    DECLARE_NO_COPY_CLASS(wxInputStream)

 };
 
 };
 

-class WXDLLEXPORT wxOutputStream : /* virtual */ public wxStreamBase
+// ----------------------------------------------------------------------------
+// wxOutputStream: base for the output streams
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxOutputStream : public wxStreamBase

 {
 public:
     wxOutputStream();
 {
 public:
     wxOutputStream();


@@ -150,12 +242,13 @@ public:
     virtual wxOutputStream& Write(const void *buffer, size_t size);
     wxOutputStream& Write(wxInputStream& stream_in);
 
     virtual wxOutputStream& Write(const void *buffer, size_t size);
     wxOutputStream& Write(wxInputStream& stream_in);
 

-    virtual off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart);
-    virtual off_t TellO() const;
+    virtual wxFileOffset SeekO(wxFileOffset pos, wxSeekMode mode = wxFromStart);
+    virtual wxFileOffset TellO() const;

 
     virtual size_t LastWrite() const { return wxStreamBase::m_lastcount; }
 
     virtual void Sync();
 
     virtual size_t LastWrite() const { return wxStreamBase::m_lastcount; }
 
     virtual void Sync();

+    virtual bool Close() { return true; }

 
     wxOutputStream& operator<<(wxInputStream& out) { return Write(out); }
     wxOutputStream& operator<<( __wxOutputManip func) { return func(*this); }
 
     wxOutputStream& operator<<(wxInputStream& out) { return Write(out); }
     wxOutputStream& operator<<( __wxOutputManip func) { return func(*this); }


@@ -166,33 +259,41 @@ protected:
     virtual size_t OnSysWrite(const void *buffer, size_t bufsize);
 
     friend class wxStreamBuffer;
     virtual size_t OnSysWrite(const void *buffer, size_t bufsize);
 
     friend class wxStreamBuffer;

+
+    DECLARE_NO_COPY_CLASS(wxOutputStream)

 };
 
 };
 

+// ============================================================================
+// helper stream classes
+// ============================================================================
+

 // ---------------------------------------------------------------------------
 // A stream for measuring streamed output
 // ---------------------------------------------------------------------------
 
 // ---------------------------------------------------------------------------
 // A stream for measuring streamed output
 // ---------------------------------------------------------------------------
 

-class WXDLLEXPORT wxCountingOutputStream : public wxOutputStream
+class WXDLLIMPEXP_BASE wxCountingOutputStream : public wxOutputStream

 {
 public:
     wxCountingOutputStream();
 
 {
 public:
     wxCountingOutputStream();
 

-    size_t GetSize() const;
-    bool Ok() const { return TRUE; }
+    wxFileOffset GetLength() const;
+    bool Ok() const { return true; }

 
 protected:
     virtual size_t OnSysWrite(const void *buffer, size_t size);
 
 protected:
     virtual size_t OnSysWrite(const void *buffer, size_t size);

-    virtual off_t OnSysSeek(off_t pos, wxSeekMode mode);
-    virtual off_t OnSysTell() const;
+    virtual wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
+    virtual wxFileOffset OnSysTell() const;

 
     size_t m_currentPos;
 
     size_t m_currentPos;

+
+    DECLARE_NO_COPY_CLASS(wxCountingOutputStream)

 };
 
 // ---------------------------------------------------------------------------
 // "Filter" streams
 // ---------------------------------------------------------------------------
 
 };
 
 // ---------------------------------------------------------------------------
 // "Filter" streams
 // ---------------------------------------------------------------------------
 

-class WXDLLEXPORT wxFilterInputStream : public wxInputStream
+class WXDLLIMPEXP_BASE wxFilterInputStream : public wxInputStream

 {
 public:
     wxFilterInputStream();
 {
 public:
     wxFilterInputStream();


@@ -201,35 +302,43 @@ public:
 
     char Peek() { return m_parent_i_stream->Peek(); }
 
 
     char Peek() { return m_parent_i_stream->Peek(); }
 

-    size_t GetSize() const { return m_parent_i_stream->GetSize(); }
+    wxFileOffset GetLength() const { return m_parent_i_stream->GetLength(); }

 
     wxInputStream *GetFilterInputStream() const { return m_parent_i_stream; }
 
 protected:
     wxInputStream *m_parent_i_stream;
 
     wxInputStream *GetFilterInputStream() const { return m_parent_i_stream; }
 
 protected:
     wxInputStream *m_parent_i_stream;

+
+    DECLARE_NO_COPY_CLASS(wxFilterInputStream)

 };
 
 };
 

-class WXDLLEXPORT wxFilterOutputStream : public wxOutputStream
+class WXDLLIMPEXP_BASE wxFilterOutputStream : public wxOutputStream

 {
 public:
     wxFilterOutputStream();
     wxFilterOutputStream(wxOutputStream& stream);
     virtual ~wxFilterOutputStream();
 
 {
 public:
     wxFilterOutputStream();
     wxFilterOutputStream(wxOutputStream& stream);
     virtual ~wxFilterOutputStream();
 

-    size_t GetSize() const { return m_parent_o_stream->GetSize(); }
+    wxFileOffset GetLength() const { return m_parent_o_stream->GetLength(); }

 
     wxOutputStream *GetFilterOutputStream() const { return m_parent_o_stream; }
 
 protected:
     wxOutputStream *m_parent_o_stream;
 
     wxOutputStream *GetFilterOutputStream() const { return m_parent_o_stream; }
 
 protected:
     wxOutputStream *m_parent_o_stream;

+
+    DECLARE_NO_COPY_CLASS(wxFilterOutputStream)

 };
 
 };
 

+// ============================================================================
+// buffered streams
+// ============================================================================
+

 // ---------------------------------------------------------------------------
 // Stream buffer: this class can be derived from and passed to
 // wxBufferedStreams to implement custom buffering
 // ---------------------------------------------------------------------------
 
 // ---------------------------------------------------------------------------
 // Stream buffer: this class can be derived from and passed to
 // wxBufferedStreams to implement custom buffering
 // ---------------------------------------------------------------------------
 

-class WXDLLEXPORT wxStreamBuffer
+class WXDLLIMPEXP_BASE wxStreamBuffer

 {
 public:
     enum BufMode
 {
 public:
     enum BufMode


@@ -240,7 +349,6 @@ public:
     };
 
     wxStreamBuffer(wxStreamBase& stream, BufMode mode);
     };
 
     wxStreamBuffer(wxStreamBase& stream, BufMode mode);

-    wxStreamBuffer(BufMode mode);

     wxStreamBuffer(const wxStreamBuffer& buf);
     virtual ~wxStreamBuffer();
 
     wxStreamBuffer(const wxStreamBuffer& buf);
     virtual ~wxStreamBuffer();
 


@@ -253,16 +361,16 @@ public:
     virtual char Peek();
     virtual char GetChar();
     virtual void PutChar(char c);
     virtual char Peek();
     virtual char GetChar();
     virtual void PutChar(char c);

-    virtual off_t Tell() const;
-    virtual off_t Seek(off_t pos, wxSeekMode mode);
+    virtual wxFileOffset Tell() const;
+    virtual wxFileOffset Seek(wxFileOffset pos, wxSeekMode mode);

 
     // Buffer control
     void ResetBuffer();
 
     // NB: the buffer must always be allocated with malloc() if takeOwn is
 
     // Buffer control
     void ResetBuffer();
 
     // NB: the buffer must always be allocated with malloc() if takeOwn is

-    //     TRUE as it will be deallocated by free()
-    void SetBufferIO(void *start, void *end, bool takeOwnership = FALSE);
-    void SetBufferIO(void *start, size_t len, bool takeOwnership = FALSE);
+    //     true as it will be deallocated by free()
+    void SetBufferIO(void *start, void *end, bool takeOwnership = false);
+    void SetBufferIO(void *start, size_t len, bool takeOwnership = false);

     void SetBufferIO(size_t bufsize);
     void *GetBufferStart() const { return m_buffer_start; }
     void *GetBufferEnd() const { return m_buffer_end; }
     void SetBufferIO(size_t bufsize);
     void *GetBufferStart() const { return m_buffer_start; }
     void *GetBufferEnd() const { return m_buffer_end; }


@@ -294,6 +402,10 @@ public:
     // deprecated, for compatibility only
     wxStreamBase *Stream() { return m_stream; }
 
     // deprecated, for compatibility only
     wxStreamBase *Stream() { return m_stream; }
 

+    // this constructs a dummy wxStreamBuffer, used by (and exists for)
+    // wxMemoryStreams only, don't use!
+    wxStreamBuffer(BufMode mode);
+

 protected:
     void GetFromBuffer(void *buffer, size_t size);
     void PutToBuffer(const void *buffer, size_t size);
 protected:
     void GetFromBuffer(void *buffer, size_t size);
     void PutToBuffer(const void *buffer, size_t size);


@@ -328,16 +440,23 @@ protected:
 
     // flags
     bool m_destroybuf,      // deallocate buffer?
 
     // flags
     bool m_destroybuf,      // deallocate buffer?

-         m_destroystream,   // delete associated stream?

          m_fixed,
          m_flushable;
          m_fixed,
          m_flushable;

+
+private:
+// Cannot use
+//  DECLARE_NO_COPY_CLASS(wxStreamBuffer)
+// because copy constructor is explicitly declared above;
+// but no copy assignment operator is defined, so declare
+// it private to prevent the compiler from defining it:
+    wxStreamBuffer& operator=(const wxStreamBuffer&);

 };
 
 // ---------------------------------------------------------------------------
 };
 
 // ---------------------------------------------------------------------------

-// wxBufferedStreams
+// wxBufferedInputStream

 // ---------------------------------------------------------------------------
 
 // ---------------------------------------------------------------------------
 

-class WXDLLEXPORT wxBufferedInputStream : public wxFilterInputStream
+class WXDLLIMPEXP_BASE wxBufferedInputStream : public wxFilterInputStream

 {
 public:
     // if a non NULL buffer is given to the stream, it will be deleted by it
 {
 public:
     // if a non NULL buffer is given to the stream, it will be deleted by it


@@ -349,8 +468,9 @@ public:
     wxInputStream& Read(void *buffer, size_t size);
 
     // Position functions
     wxInputStream& Read(void *buffer, size_t size);
 
     // Position functions

-    off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart);
-    off_t TellI() const;
+    wxFileOffset SeekI(wxFileOffset pos, wxSeekMode mode = wxFromStart);
+    wxFileOffset TellI() const;
+    bool IsSeekable() const { return m_parent_i_stream->IsSeekable(); }

 
     // the buffer given to the stream will be deleted by it
     void SetInputStreamBuffer(wxStreamBuffer *buffer);
 
     // the buffer given to the stream will be deleted by it
     void SetInputStreamBuffer(wxStreamBuffer *buffer);


@@ -361,13 +481,19 @@ public:
 
 protected:
     virtual size_t OnSysRead(void *buffer, size_t bufsize);
 
 protected:
     virtual size_t OnSysRead(void *buffer, size_t bufsize);

-    virtual off_t OnSysSeek(off_t seek, wxSeekMode mode);
-    virtual off_t OnSysTell() const;
+    virtual wxFileOffset OnSysSeek(wxFileOffset seek, wxSeekMode mode);
+    virtual wxFileOffset OnSysTell() const;

 
     wxStreamBuffer *m_i_streambuf;
 
     wxStreamBuffer *m_i_streambuf;

+
+    DECLARE_NO_COPY_CLASS(wxBufferedInputStream)

 };
 
 };
 

-class WXDLLEXPORT wxBufferedOutputStream : public wxFilterOutputStream
+// ----------------------------------------------------------------------------
+// wxBufferedOutputStream
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxBufferedOutputStream : public wxFilterOutputStream

 {
 public:
     // if a non NULL buffer is given to the stream, it will be deleted by it
 {
 public:
     // if a non NULL buffer is given to the stream, it will be deleted by it


@@ -378,12 +504,14 @@ public:
     wxOutputStream& Write(const void *buffer, size_t size);
 
     // Position functions
     wxOutputStream& Write(const void *buffer, size_t size);
 
     // Position functions

-    off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart);
-    off_t TellO() const;
+    wxFileOffset SeekO(wxFileOffset pos, wxSeekMode mode = wxFromStart);
+    wxFileOffset TellO() const;
+    bool IsSeekable() const { return m_parent_o_stream->IsSeekable(); }

 
     void Sync();
 
     void Sync();

+    bool Close();

 
 

-    size_t GetSize() const;
+    wxFileOffset GetLength() const;

 
     // the buffer given to the stream will be deleted by it
     void SetOutputStreamBuffer(wxStreamBuffer *buffer);
 
     // the buffer given to the stream will be deleted by it
     void SetOutputStreamBuffer(wxStreamBuffer *buffer);


@@ -394,10 +522,12 @@ public:
 
 protected:
     virtual size_t OnSysWrite(const void *buffer, size_t bufsize);
 
 protected:
     virtual size_t OnSysWrite(const void *buffer, size_t bufsize);

-    virtual off_t OnSysSeek(off_t seek, wxSeekMode mode);
-    virtual off_t OnSysTell() const;
+    virtual wxFileOffset OnSysSeek(wxFileOffset seek, wxSeekMode mode);
+    virtual wxFileOffset OnSysTell() const;

 
     wxStreamBuffer *m_o_streambuf;
 
     wxStreamBuffer *m_o_streambuf;

+
+    DECLARE_NO_COPY_CLASS(wxBufferedOutputStream)

 };
 
 #endif // wxUSE_STREAMS
 };
 
 #endif // wxUSE_STREAMS