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///////////////////////////////////////////////////////////////////////////////
// Name: wx/sstream.h
// Purpose: string-based streams
// Author: Vadim Zeitlin
// Modified by:
// Created: 2004-09-19
// RCS-ID: $Id: sstream.h 45732 2007-05-01 13:52:19Z VZ $
// Copyright: (c) 2004 Vadim Zeitlin <vadim@wxwindows.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_SSTREAM_H_
#define _WX_SSTREAM_H_
#include "wx/stream.h"
#if wxUSE_STREAMS
// ----------------------------------------------------------------------------
// wxStringInputStream is a stream reading from the given (fixed size) string
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxStringInputStream : public wxInputStream
{
public:
// ctor associates the stream with the given string which makes a copy of
// it
wxStringInputStream(const wxString& s);
virtual ~wxStringInputStream();
virtual wxFileOffset GetLength() const;
protected:
virtual wxFileOffset OnSysSeek(wxFileOffset ofs, wxSeekMode mode);
virtual wxFileOffset OnSysTell() const;
virtual size_t OnSysRead(void *buffer, size_t size);
private:
// the string that was passed in the ctor
wxString m_str;
// the buffer we're reading from
char* m_buf;
// length of the buffer we're reading from
size_t m_len;
// position in the stream in bytes, *not* in chars
size_t m_pos;
DECLARE_NO_COPY_CLASS(wxStringInputStream)
};
// ----------------------------------------------------------------------------
// wxStringOutputStream writes data to the given string, expanding it as needed
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxStringOutputStream : public wxOutputStream
{
public:
// The stream will write data either to the provided string or to an
// internal string which can be retrieved using GetString()
wxStringOutputStream(wxString *pString = NULL)
{
m_str = pString ? pString : &m_strInternal;
m_pos = m_str->length() / sizeof(wxChar);
}
#if wxABI_VERSION >= 20804 && wxUSE_UNICODE
virtual ~wxStringOutputStream();
#endif // wx 2.8.4+
// get the string containing current output
const wxString& GetString() const { return *m_str; }
protected:
virtual wxFileOffset OnSysTell() const;
virtual size_t OnSysWrite(const void *buffer, size_t size);
private:
// internal string, not used if caller provided his own string
wxString m_strInternal;
// pointer given by the caller or just pointer to m_strInternal
wxString *m_str;
// position in the stream in bytes, *not* in chars
size_t m_pos;
#if wxUSE_WCHAR_T
// string encoding converter (UTF8 is the standard)
wxMBConvUTF8 m_conv;
#else
wxMBConv m_conv;
#endif
DECLARE_NO_COPY_CLASS(wxStringOutputStream)
};
#endif // wxUSE_STREAMS
#endif // _WX_SSTREAM_H_
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