3f66f6a5b3
This keyword is not expanded by Git which means it's not replaced with the correct revision value in the releases made using git-based scripts and it's confusing to have lines with unexpanded "$Id$" in the released files. As expanding them with Git is not that simple (it could be done with git archive and export-subst attribute) and there are not many benefits in having them in the first place, just remove all these lines. If nothing else, this will make an eventual transition to Git simpler. Closes #14487. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/private/fileback.h
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// Purpose: Back an input stream with memory or a file
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// Author: Mike Wetherell
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// Copyright: (c) 2006 Mike Wetherell
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_FILEBACK_H__
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#define _WX_FILEBACK_H__
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#include "wx/defs.h"
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#if wxUSE_FILESYSTEM
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#include "wx/stream.h"
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// ----------------------------------------------------------------------------
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// Backs an input stream with memory or a file to make it seekable.
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//
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// One or more wxBackedInputStreams can be used to read it's data. The data is
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// reference counted, so stays alive until the last wxBackingFile or
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// wxBackedInputStream using it is destroyed.
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxBackingFile
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{
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public:
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enum { DefaultBufSize = 16384 };
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// Takes ownership of stream. If the stream is smaller than bufsize, the
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// backing file is never created and the backing is done with memory.
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wxBackingFile(wxInputStream *stream,
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size_t bufsize = DefaultBufSize,
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const wxString& prefix = wxT("wxbf"));
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wxBackingFile() : m_impl(NULL) { }
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~wxBackingFile();
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wxBackingFile(const wxBackingFile& backer);
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wxBackingFile& operator=(const wxBackingFile& backer);
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operator bool() const { return m_impl != NULL; }
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private:
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class wxBackingFileImpl *m_impl;
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friend class wxBackedInputStream;
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};
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// ----------------------------------------------------------------------------
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// An input stream to read from a wxBackingFile.
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxBackedInputStream : public wxInputStream
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{
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public:
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wxBackedInputStream(const wxBackingFile& backer);
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// If the length of the backer's parent stream is unknown then GetLength()
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// returns wxInvalidOffset until the parent has been read to the end.
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wxFileOffset GetLength() const;
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// Returns the length, reading the parent stream to the end if necessary.
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wxFileOffset FindLength() const;
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bool IsSeekable() const { return true; }
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protected:
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size_t OnSysRead(void *buffer, size_t size);
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wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
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wxFileOffset OnSysTell() const;
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private:
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wxBackingFile m_backer;
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wxFileOffset m_pos;
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wxDECLARE_NO_COPY_CLASS(wxBackedInputStream);
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};
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#endif // wxUSE_FILESYSTEM
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#endif // _WX_FILEBACK_H__
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