wxWidgets/include/wx/mstream.h

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/////////////////////////////////////////////////////////////////////////////
// Name: mstream.h
// Purpose: Memory stream classes
// Author: Guilhem Lavaux
// Modified by:
// Created: 11/07/98
// RCS-ID: $Id$
// Copyright: (c) Guilhem Lavaux
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef __WXMMSTREAM_H__
#define __WXMMSTREAM_H__
#include <wx/stream.h>
class wxMemoryStreamBase {
protected:
wxMemoryStreamBase();
virtual ~wxMemoryStreamBase();
bool ChangeBufferSize(size_t new_length);
protected:
bool m_persistent;
size_t m_length;
char *m_buffer;
int m_iolimit;
};
class wxMemoryInputStream: virtual public wxMemoryStreamBase, public wxInputStream {
public:
wxMemoryInputStream(const char *data, size_t length);
virtual ~wxMemoryInputStream();
char Peek();
protected:
size_t DoRead(void *buffer, size_t size);
off_t DoSeekInput(off_t pos, wxSeekMode mode);
off_t DoTellInput() const { return m_position_i; }
protected:
off_t m_position_i;
};
class wxMemoryOutputStream: virtual public wxMemoryStreamBase, public wxOutputStream {
public:
wxMemoryOutputStream(char *data = NULL, size_t length = 0);
virtual ~wxMemoryOutputStream();
char *GetData() { Sync(); return m_buffer; }
size_t GetLength() { Sync(); return m_length; }
protected:
size_t DoWrite(const void *buffer, size_t size);
off_t DoSeekOutput(off_t pos, wxSeekMode mode);
off_t DoTellOutput() const { return m_position_o; }
protected:
off_t m_position_o;
};
class wxMemoryStream: public wxMemoryInputStream, public wxMemoryOutputStream {
public:
wxMemoryStream(char *data = NULL, size_t length = 0);
virtual ~wxMemoryStream();
};
#endif