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Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: wx/mstream.h
	3	// Purpose: Memory stream classes
	4	// Author: Guilhem Lavaux
	5	// Modified by:
	6	// Created: 11/07/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Guilhem Lavaux
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifndef _WX_WXMMSTREAM_H__
	13	#define _WX_WXMMSTREAM_H__
	14
	15	#include "wx/defs.h"
	16
	17	#if wxUSE_STREAMS
	18
	19	#include "wx/stream.h"
	20
	21	class WXDLLIMPEXP_BASE wxMemoryOutputStream;
	22
	23	class WXDLLIMPEXP_BASE wxMemoryInputStream : public wxInputStream
	24	{
	25	public:
	26	wxMemoryInputStream(const void *data, size_t length);
	27	wxMemoryInputStream(const wxMemoryOutputStream& stream);
	28	wxMemoryInputStream(wxInputStream& stream,
	29	wxFileOffset lenFile = wxInvalidOffset)
	30	{
	31	InitFromStream(stream, lenFile);
	32	}
	33	wxMemoryInputStream(wxMemoryInputStream& stream)
	34	{
	35	InitFromStream(stream, wxInvalidOffset);
	36	}
	37
	38	virtual ~wxMemoryInputStream();
	39	virtual wxFileOffset GetLength() const { return m_length; }
	40	virtual bool IsSeekable() const { return true; }
	41
	42	virtual char Peek();
	43	virtual bool CanRead() const;
	44
	45	wxStreamBuffer *GetInputStreamBuffer() const { return m_i_streambuf; }
	46
	47	#if WXWIN_COMPATIBILITY_2_6
	48	// deprecated, compatibility only
	49	wxDEPRECATED( wxStreamBuffer *InputStreamBuffer() const );
	50	#endif // WXWIN_COMPATIBILITY_2_6
	51
	52	protected:
	53	wxStreamBuffer *m_i_streambuf;
	54
	55	size_t OnSysRead(void *buffer, size_t nbytes);
	56	wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
	57	wxFileOffset OnSysTell() const;
	58
	59	private:
	60	// common part of ctors taking wxInputStream
	61	void InitFromStream(wxInputStream& stream, wxFileOffset lenFile);
	62
	63	size_t m_length;
	64
	65	// copy ctor is implemented above: it copies the other stream in this one
	66	DECLARE_NO_ASSIGN_CLASS(wxMemoryInputStream)
	67	};
	68
	69	class WXDLLIMPEXP_BASE wxMemoryOutputStream : public wxOutputStream
	70	{
	71	public:
	72	// if data is !NULL it must be allocated with malloc()
	73	wxMemoryOutputStream(void *data = NULL, size_t length = 0);
	74	virtual ~wxMemoryOutputStream();
	75	virtual wxFileOffset GetLength() const { return m_o_streambuf->GetLastAccess(); }
	76	virtual bool IsSeekable() const { return true; }
	77
	78	size_t CopyTo(void *buffer, size_t len) const;
	79
	80	wxStreamBuffer *GetOutputStreamBuffer() const { return m_o_streambuf; }
	81
	82	#if WXWIN_COMPATIBILITY_2_6
	83	// deprecated, compatibility only
	84	wxDEPRECATED( wxStreamBuffer *OutputStreamBuffer() const );
	85	#endif // WXWIN_COMPATIBILITY_2_6
	86
	87	protected:
	88	wxStreamBuffer *m_o_streambuf;
	89
	90	protected:
	91	size_t OnSysWrite(const void *buffer, size_t nbytes);
	92	wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
	93	wxFileOffset OnSysTell() const;
	94
	95	DECLARE_NO_COPY_CLASS(wxMemoryOutputStream)
	96	};
	97
	98	#if WXWIN_COMPATIBILITY_2_6
	99	inline wxStreamBuffer *wxMemoryInputStream::InputStreamBuffer() const { return m_i_streambuf; }
	100	inline wxStreamBuffer *wxMemoryOutputStream::OutputStreamBuffer() const { return m_o_streambuf; }
	101	#endif // WXWIN_COMPATIBILITY_2_6
	102
	103	#endif
	104	// wxUSE_STREAMS
	105
	106	#endif
	107	// _WX_WXMMSTREAM_H__