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104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/sstream.h
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// Purpose: string-based streams
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 2004-09-19
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// RCS-ID: $Id: sstream.h 45732 2007-05-01 13:52:19Z VZ $
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// Copyright: (c) 2004 Vadim Zeitlin <vadim@wxwindows.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_SSTREAM_H_
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#define _WX_SSTREAM_H_
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#include "wx/stream.h"
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#if wxUSE_STREAMS
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// ----------------------------------------------------------------------------
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// wxStringInputStream is a stream reading from the given (fixed size) string
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxStringInputStream : public wxInputStream
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{
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public:
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// ctor associates the stream with the given string which makes a copy of
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// it
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wxStringInputStream(const wxString& s);
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virtual ~wxStringInputStream();
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virtual wxFileOffset GetLength() const;
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protected:
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virtual wxFileOffset OnSysSeek(wxFileOffset ofs, wxSeekMode mode);
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virtual wxFileOffset OnSysTell() const;
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virtual size_t OnSysRead(void *buffer, size_t size);
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private:
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// the string that was passed in the ctor
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wxString m_str;
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// the buffer we're reading from
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char* m_buf;
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// length of the buffer we're reading from
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size_t m_len;
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// position in the stream in bytes, *not* in chars
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size_t m_pos;
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DECLARE_NO_COPY_CLASS(wxStringInputStream)
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};
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// ----------------------------------------------------------------------------
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// wxStringOutputStream writes data to the given string, expanding it as needed
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxStringOutputStream : public wxOutputStream
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{
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public:
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// The stream will write data either to the provided string or to an
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// internal string which can be retrieved using GetString()
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wxStringOutputStream(wxString *pString = NULL)
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{
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m_str = pString ? pString : &m_strInternal;
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m_pos = m_str->length() / sizeof(wxChar);
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}
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#if wxABI_VERSION >= 20804 && wxUSE_UNICODE
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virtual ~wxStringOutputStream();
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#endif // wx 2.8.4+
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// get the string containing current output
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const wxString& GetString() const { return *m_str; }
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protected:
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virtual wxFileOffset OnSysTell() const;
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virtual size_t OnSysWrite(const void *buffer, size_t size);
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private:
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// internal string, not used if caller provided his own string
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wxString m_strInternal;
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// pointer given by the caller or just pointer to m_strInternal
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wxString *m_str;
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// position in the stream in bytes, *not* in chars
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size_t m_pos;
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#if wxUSE_WCHAR_T
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// string encoding converter (UTF8 is the standard)
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wxMBConvUTF8 m_conv;
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#else
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wxMBConv m_conv;
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#endif
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DECLARE_NO_COPY_CLASS(wxStringOutputStream)
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};
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#endif // wxUSE_STREAMS
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#endif // _WX_SSTREAM_H_
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