| 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 | virtual ~wxMemoryInputStream(); |
| 29 | virtual wxFileOffset GetLength() const { return m_length; } |
| 30 | virtual bool Eof() const; |
| 31 | virtual bool IsSeekable() const { return true; } |
| 32 | |
| 33 | char Peek(); |
| 34 | |
| 35 | wxStreamBuffer *GetInputStreamBuffer() const { return m_i_streambuf; } |
| 36 | |
| 37 | // deprecated, compatibility only |
| 38 | wxStreamBuffer *InputStreamBuffer() const { return m_i_streambuf; } |
| 39 | |
| 40 | protected: |
| 41 | wxStreamBuffer *m_i_streambuf; |
| 42 | |
| 43 | size_t OnSysRead(void *buffer, size_t nbytes); |
| 44 | wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode); |
| 45 | wxFileOffset OnSysTell() const; |
| 46 | |
| 47 | private: |
| 48 | size_t m_length; |
| 49 | |
| 50 | DECLARE_NO_COPY_CLASS(wxMemoryInputStream) |
| 51 | }; |
| 52 | |
| 53 | class WXDLLIMPEXP_BASE wxMemoryOutputStream : public wxOutputStream |
| 54 | { |
| 55 | public: |
| 56 | // if data is !NULL it must be allocated with malloc() |
| 57 | wxMemoryOutputStream(void *data = NULL, size_t length = 0); |
| 58 | virtual ~wxMemoryOutputStream(); |
| 59 | virtual wxFileOffset GetLength() const { return m_o_streambuf->GetLastAccess(); } |
| 60 | virtual bool IsSeekable() const { return true; } |
| 61 | |
| 62 | size_t CopyTo(void *buffer, size_t len) const; |
| 63 | |
| 64 | wxStreamBuffer *GetOutputStreamBuffer() const { return m_o_streambuf; } |
| 65 | |
| 66 | // deprecated, compatibility only |
| 67 | wxStreamBuffer *OutputStreamBuffer() const { return m_o_streambuf; } |
| 68 | |
| 69 | protected: |
| 70 | wxStreamBuffer *m_o_streambuf; |
| 71 | |
| 72 | protected: |
| 73 | size_t OnSysWrite(const void *buffer, size_t nbytes); |
| 74 | wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode); |
| 75 | wxFileOffset OnSysTell() const; |
| 76 | |
| 77 | DECLARE_NO_COPY_CLASS(wxMemoryOutputStream) |
| 78 | }; |
| 79 | |
| 80 | #endif |
| 81 | // wxUSE_STREAMS |
| 82 | |
| 83 | #endif |
| 84 | // _WX_WXMMSTREAM_H__ |
| 85 | |