110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/mstream.h
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// Purpose: Memory stream classes
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// Author: Guilhem Lavaux
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// Modified by:
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// Created: 11/07/98
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// Copyright: (c) Guilhem Lavaux
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_WXMMSTREAM_H__
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#define _WX_WXMMSTREAM_H__
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#include "wx/defs.h"
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#if wxUSE_STREAMS
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#include "wx/stream.h"
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class WXDLLIMPEXP_FWD_BASE wxMemoryOutputStream;
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class WXDLLIMPEXP_BASE wxMemoryInputStream : public wxInputStream
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{
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public:
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wxMemoryInputStream(const void *data, size_t length);
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wxMemoryInputStream(const wxMemoryOutputStream& stream);
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wxMemoryInputStream(wxInputStream& stream,
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wxFileOffset lenFile = wxInvalidOffset)
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{
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InitFromStream(stream, lenFile);
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}
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wxMemoryInputStream(wxMemoryInputStream& stream)
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: wxInputStream()
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{
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InitFromStream(stream, wxInvalidOffset);
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}
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virtual ~wxMemoryInputStream();
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virtual wxFileOffset GetLength() const { return m_length; }
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virtual bool IsSeekable() const { return true; }
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virtual char Peek();
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virtual bool CanRead() const;
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wxStreamBuffer *GetInputStreamBuffer() const { return m_i_streambuf; }
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#if WXWIN_COMPATIBILITY_2_6
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// deprecated, compatibility only
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wxDEPRECATED( wxStreamBuffer *InputStreamBuffer() const );
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#endif // WXWIN_COMPATIBILITY_2_6
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protected:
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wxStreamBuffer *m_i_streambuf;
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size_t OnSysRead(void *buffer, size_t nbytes);
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wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
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wxFileOffset OnSysTell() const;
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private:
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// common part of ctors taking wxInputStream
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void InitFromStream(wxInputStream& stream, wxFileOffset lenFile);
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size_t m_length;
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// copy ctor is implemented above: it copies the other stream in this one
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DECLARE_ABSTRACT_CLASS(wxMemoryInputStream)
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wxDECLARE_NO_ASSIGN_CLASS(wxMemoryInputStream);
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};
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class WXDLLIMPEXP_BASE wxMemoryOutputStream : public wxOutputStream
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{
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public:
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// if data is !NULL it must be allocated with malloc()
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wxMemoryOutputStream(void *data = NULL, size_t length = 0);
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virtual ~wxMemoryOutputStream();
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virtual wxFileOffset GetLength() const { return m_o_streambuf->GetLastAccess(); }
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virtual bool IsSeekable() const { return true; }
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size_t CopyTo(void *buffer, size_t len) const;
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wxStreamBuffer *GetOutputStreamBuffer() const { return m_o_streambuf; }
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#if WXWIN_COMPATIBILITY_2_6
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// deprecated, compatibility only
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wxDEPRECATED( wxStreamBuffer *OutputStreamBuffer() const );
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#endif // WXWIN_COMPATIBILITY_2_6
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protected:
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wxStreamBuffer *m_o_streambuf;
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protected:
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size_t OnSysWrite(const void *buffer, size_t nbytes);
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wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
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wxFileOffset OnSysTell() const;
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DECLARE_DYNAMIC_CLASS(wxMemoryOutputStream)
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wxDECLARE_NO_COPY_CLASS(wxMemoryOutputStream);
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};
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#if WXWIN_COMPATIBILITY_2_6
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inline wxStreamBuffer *wxMemoryInputStream::InputStreamBuffer() const { return m_i_streambuf; }
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inline wxStreamBuffer *wxMemoryOutputStream::OutputStreamBuffer() const { return m_o_streambuf; }
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#endif // WXWIN_COMPATIBILITY_2_6
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#endif
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// wxUSE_STREAMS
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#endif
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// _WX_WXMMSTREAM_H__
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