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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_FWD_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	: wxInputStream()
	35	{
	36	InitFromStream(stream, wxInvalidOffset);
	37	}
	38
	39	virtual ~wxMemoryInputStream();
	40	virtual wxFileOffset GetLength() const { return m_length; }
	41	virtual bool IsSeekable() const { return true; }
	42
	43	virtual char Peek();
	44	virtual bool CanRead() const;
	45
	46	wxStreamBuffer *GetInputStreamBuffer() const { return m_i_streambuf; }
	47
	48	#if WXWIN_COMPATIBILITY_2_6
	49	// deprecated, compatibility only
	50	wxDEPRECATED( wxStreamBuffer *InputStreamBuffer() const );
	51	#endif // WXWIN_COMPATIBILITY_2_6
	52
	53	protected:
	54	wxStreamBuffer *m_i_streambuf;
	55
	56	size_t OnSysRead(void *buffer, size_t nbytes);
	57	wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
	58	wxFileOffset OnSysTell() const;
	59
	60	private:
	61	// common part of ctors taking wxInputStream
	62	void InitFromStream(wxInputStream& stream, wxFileOffset lenFile);
	63
	64	size_t m_length;
	65
	66	// copy ctor is implemented above: it copies the other stream in this one
	67	DECLARE_ABSTRACT_CLASS(wxMemoryInputStream)
	68	wxDECLARE_NO_ASSIGN_CLASS(wxMemoryInputStream);
	69	};
	70
	71	class WXDLLIMPEXP_BASE wxMemoryOutputStream : public wxOutputStream
	72	{
	73	public:
	74	// if data is !NULL it must be allocated with malloc()
	75	wxMemoryOutputStream(void *data = NULL, size_t length = 0);
	76	virtual ~wxMemoryOutputStream();
	77	virtual wxFileOffset GetLength() const { return m_o_streambuf->GetLastAccess(); }
	78	virtual bool IsSeekable() const { return true; }
	79
	80	size_t CopyTo(void *buffer, size_t len) const;
	81
	82	wxStreamBuffer *GetOutputStreamBuffer() const { return m_o_streambuf; }
	83
	84	#if WXWIN_COMPATIBILITY_2_6
	85	// deprecated, compatibility only
	86	wxDEPRECATED( wxStreamBuffer *OutputStreamBuffer() const );
	87	#endif // WXWIN_COMPATIBILITY_2_6
	88
	89	protected:
	90	wxStreamBuffer *m_o_streambuf;
	91
	92	protected:
	93	size_t OnSysWrite(const void *buffer, size_t nbytes);
	94	wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
	95	wxFileOffset OnSysTell() const;
	96
	97	DECLARE_DYNAMIC_CLASS(wxMemoryOutputStream)
	98	wxDECLARE_NO_COPY_CLASS(wxMemoryOutputStream);
	99	};
	100
	101	#if WXWIN_COMPATIBILITY_2_6
	102	inline wxStreamBuffer *wxMemoryInputStream::InputStreamBuffer() const { return m_i_streambuf; }
	103	inline wxStreamBuffer *wxMemoryOutputStream::OutputStreamBuffer() const { return m_o_streambuf; }
	104	#endif // WXWIN_COMPATIBILITY_2_6
	105
	106	#endif
	107	// wxUSE_STREAMS
	108
	109	#endif
	110	// _WX_WXMMSTREAM_H__