| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: wx/sstream.h |
| 3 | // Purpose: string-based streams |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: 2004-09-19 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 2004 Vadim Zeitlin <vadim@wxwindows.org> |
| 9 | // Licence: wxWindows licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifndef _WX_SSTREAM_H_ |
| 13 | #define _WX_SSTREAM_H_ |
| 14 | |
| 15 | #include "wx/stream.h" |
| 16 | |
| 17 | #if wxUSE_STREAMS |
| 18 | |
| 19 | // ---------------------------------------------------------------------------- |
| 20 | // wxStringInputStream is a stream reading from the given (fixed size) string |
| 21 | // ---------------------------------------------------------------------------- |
| 22 | |
| 23 | class WXDLLIMPEXP_BASE wxStringInputStream : public wxInputStream |
| 24 | { |
| 25 | public: |
| 26 | // ctor associates the stream with the given string which makes a copy of |
| 27 | // it |
| 28 | wxStringInputStream(const wxString& s); |
| 29 | virtual ~wxStringInputStream(); |
| 30 | |
| 31 | virtual wxFileOffset GetLength() const; |
| 32 | |
| 33 | protected: |
| 34 | virtual wxFileOffset OnSysSeek(wxFileOffset ofs, wxSeekMode mode); |
| 35 | virtual wxFileOffset OnSysTell() const; |
| 36 | virtual size_t OnSysRead(void *buffer, size_t size); |
| 37 | |
| 38 | private: |
| 39 | // the string that was passed in the ctor |
| 40 | wxString m_str; |
| 41 | |
| 42 | // the buffer we're reading from |
| 43 | char* m_buf; |
| 44 | |
| 45 | // length of the buffer we're reading from |
| 46 | size_t m_len; |
| 47 | |
| 48 | // position in the stream in bytes, *not* in chars |
| 49 | size_t m_pos; |
| 50 | |
| 51 | DECLARE_NO_COPY_CLASS(wxStringInputStream) |
| 52 | }; |
| 53 | |
| 54 | // ---------------------------------------------------------------------------- |
| 55 | // wxStringOutputStream writes data to the given string, expanding it as needed |
| 56 | // ---------------------------------------------------------------------------- |
| 57 | |
| 58 | class WXDLLIMPEXP_BASE wxStringOutputStream : public wxOutputStream |
| 59 | { |
| 60 | public: |
| 61 | // The stream will write data either to the provided string or to an |
| 62 | // internal string which can be retrieved using GetString() |
| 63 | wxStringOutputStream(wxString *pString = NULL) |
| 64 | { |
| 65 | m_str = pString ? pString : &m_strInternal; |
| 66 | m_pos = m_str->length() / sizeof(wxChar); |
| 67 | } |
| 68 | |
| 69 | // get the string containing current output |
| 70 | const wxString& GetString() const { return *m_str; } |
| 71 | |
| 72 | protected: |
| 73 | virtual wxFileOffset OnSysTell() const; |
| 74 | virtual size_t OnSysWrite(const void *buffer, size_t size); |
| 75 | |
| 76 | private: |
| 77 | // internal string, not used if caller provided his own string |
| 78 | wxString m_strInternal; |
| 79 | |
| 80 | // pointer given by the caller or just pointer to m_strInternal |
| 81 | wxString *m_str; |
| 82 | |
| 83 | // position in the stream in bytes, *not* in chars |
| 84 | size_t m_pos; |
| 85 | |
| 86 | #if wxUSE_WCHAR_T |
| 87 | // string encoding converter (UTF8 is the standard) |
| 88 | wxMBConvUTF8 m_conv; |
| 89 | #else |
| 90 | wxMBConv m_conv; |
| 91 | #endif |
| 92 | |
| 93 | DECLARE_NO_COPY_CLASS(wxStringOutputStream) |
| 94 | }; |
| 95 | |
| 96 | #endif // wxUSE_STREAMS |
| 97 | |
| 98 | #endif // _WX_SSTREAM_H_ |
| 99 | |