As-gui Sources / file revision

 //

 //  OSSP asgui - Accounting system graphical user interface

 //  Copyright (c) 2002-2004 The OSSP Project (http://www.ossp.org/)

 //  Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com>

 //  Copyright (c) 2002-2004 Michael Schloh von Bennewitz <michael@schloh.com>

 //  Copyright (c) 2002-2004 Cable & Wireless Telecommunications Services GmbH

 //

 //  This file is part of OSSP asgui, an accounting system graphical user

 //  interface which can be found at http://www.ossp.org/pkg/tool/asgui/.

 //

 //  Permission to use, copy, modify, and distribute this software for

 //  any purpose with or without fee is hereby granted, provided that

 //  the above copyright notice and this permission notice appear in all

 //  copies.

 //

 //  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED

 //  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 //  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 //  IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR

 //  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 //  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 //  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 //  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 //  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 //  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT

 //  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 //  SUCH DAMAGE.

 //

 //  as_sfile.cpp: ISO C++ implementation

 //

 #include "as_sfile.h"

 #include "as_except.h"

 //

 // Serialize a backup of an incoming file object

 //

 void Simplefile::makeBackup(void)

 {

     QFile Filein;           // Input readonly file

     QFile Filebak;          // Backup writeonly file

     QString Fname;          // Filename of input file

     QTextStream Streamin;   // Stream to read from (Filein)

     QTextStream Streambak;  // Stream to write to (Filebak)

     try {

         if(!this->exists())                 // Conditionally short circuit if

             return;                         // file to backup does not exist

         Fname = this->name();               // Copy filename from original

         Filein.setName(Fname);              // Set filename of original

         Filein.open(IO_ReadOnly);           // Open original read-only

         Filebak.setName(Fname + ".bak");    // Set filename of backup

         Filebak.open(IO_WriteOnly);         // Open backup write-only

         Streamin.setDevice(&Filein);        // Set incoming stream

         Streambak.setDevice(&Filebak);      // Set outgoing stream

         Streambak << Streamin.read();       // Do actual writing

         Filein.close();                     // Close original

         Filebak.close();                    // Close backup

     }

     catch (Genexcept& Genex) {

         Genex.reportErr();

     }

 }