f3140390f9
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45041 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/ffile.h
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// Purpose: wxFFile - encapsulates "FILE *" stream
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 14.07.99
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// RCS-ID: $Id$
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// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_FFILE_H_
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#define _WX_FFILE_H_
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#include "wx/defs.h" // for wxUSE_FFILE
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#if wxUSE_FFILE
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#include "wx/string.h"
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#include "wx/filefn.h"
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#include "wx/convauto.h"
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#include <stdio.h>
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// ----------------------------------------------------------------------------
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// class wxFFile: standard C stream library IO
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//
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// NB: for space efficiency this class has no virtual functions, including
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// dtor which is _not_ virtual, so it shouldn't be used as a base class.
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxFFile
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{
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public:
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// ctors
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// -----
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// def ctor
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wxFFile() { m_fp = NULL; }
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// open specified file (may fail, use IsOpened())
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wxFFile(const wxChar *filename, const wxChar *mode = _T("r"));
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// attach to (already opened) file
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wxFFile(FILE *lfp) { m_fp = lfp; }
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// open/close
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// open a file (existing or not - the mode controls what happens)
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bool Open(const wxChar *filename, const wxChar *mode = _T("r"));
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// closes the opened file (this is a NOP if not opened)
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bool Close();
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// assign an existing file descriptor and get it back from wxFFile object
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void Attach(FILE *lfp, const wxString& name = wxEmptyString)
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{ Close(); m_fp = lfp; m_name = name; }
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void Detach() { m_fp = NULL; }
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FILE *fp() const { return m_fp; }
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// read/write (unbuffered)
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// read all data from the file into a string (useful for text files)
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bool ReadAll(wxString *str, const wxMBConv& conv = wxConvAuto());
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// returns number of bytes read - use Eof() and Error() to see if an error
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// occurred or not
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size_t Read(void *pBuf, size_t nCount);
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// returns the number of bytes written
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size_t Write(const void *pBuf, size_t nCount);
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// returns true on success
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bool Write(const wxString& s, const wxMBConv& conv = wxConvAuto())
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{
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const wxWX2MBbuf buf = s.mb_str(conv);
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if (buf)
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{
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size_t size = strlen(buf);
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return Write((const char *)buf, size) == size;
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}
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else
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return false;
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}
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// flush data not yet written
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bool Flush();
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// file pointer operations (return ofsInvalid on failure)
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// move ptr ofs bytes related to start/current pos/end of file
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bool Seek(wxFileOffset ofs, wxSeekMode mode = wxFromStart);
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// move ptr to ofs bytes before the end
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bool SeekEnd(wxFileOffset ofs = 0) { return Seek(ofs, wxFromEnd); }
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// get current position in the file
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wxFileOffset Tell() const;
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// get current file length
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wxFileOffset Length() const;
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// simple accessors: note that Eof() and Error() may only be called if
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// IsOpened()!
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// is file opened?
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bool IsOpened() const { return m_fp != NULL; }
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// is end of file reached?
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bool Eof() const { return feof(m_fp) != 0; }
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// has an error occurred?
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bool Error() const { return ferror(m_fp) != 0; }
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// get the file name
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const wxString& GetName() const { return m_name; }
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// type such as disk or pipe
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wxFileKind GetKind() const { return wxGetFileKind(m_fp); }
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// dtor closes the file if opened
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~wxFFile() { Close(); }
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private:
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// copy ctor and assignment operator are private because it doesn't make
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// sense to copy files this way: attempt to do it will provoke a compile-time
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// error.
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wxFFile(const wxFFile&);
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wxFFile& operator=(const wxFFile&);
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FILE *m_fp; // IO stream or NULL if not opened
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wxString m_name; // the name of the file (for diagnostic messages)
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};
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#endif // wxUSE_FFILE
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#endif // _WX_FFILE_H_
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