Qt 4.8: main.cpp Example File (xml/xmlstreamlint/main.cpp)

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# main.cpp Example File

xml/xmlstreamlint/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS 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 COPYRIGHT
     ** OWNER OR 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."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include <QCoreApplication>
     #include <QFile>
     #include <QStringList>
     #include <QTextStream>
     #include <QXmlStreamReader>

     /*
      This class exists for the sole purpose of creating a translation context.
     */
     class XmlStreamLint
     {
     public:
         Q_DECLARE_TR_FUNCTIONS(XmlStreamLint)
     };

     int main(int argc, char *argv[])
     {
         enum ExitCode
         {
             Success,
             ParseFailure,
             ArgumentError,
             WriteError,
             FileFailure
         };

         QCoreApplication app(argc, argv);

         QTextStream errorStream(stderr);

         if (argc != 2)
         {
             errorStream << XmlStreamLint::tr(
                            "Usage: xmlstreamlint <path to XML file>\n");
             return ArgumentError;
         }

         QString inputFilePath(QCoreApplication::arguments().at(1));
         QFile inputFile(inputFilePath);

         if (!QFile::exists(inputFilePath))
         {
             errorStream << XmlStreamLint::tr(
                            "File %1 does not exist.\n").arg(inputFilePath);
             return FileFailure;

         } else if (!inputFile.open(QIODevice::ReadOnly)) {
             errorStream << XmlStreamLint::tr(
                            "Failed to open file %1.\n").arg(inputFilePath);
             return FileFailure;
         }

         QFile outputFile;
         if (!outputFile.open(stdout, QIODevice::WriteOnly))
         {
             errorStream << XmlStreamLint::tr("Failed to open stdout.");
             return WriteError;
         }

         QXmlStreamReader reader(&inputFile);
         QXmlStreamWriter writer(&outputFile);

         while (!reader.atEnd())
         {
             reader.readNext();

             if (reader.error())
             {
                 errorStream << XmlStreamLint::tr(
                                "Error: %1 in file %2 at line %3, column %4.\n").arg(
                                    reader.errorString(), inputFilePath,
                                    QString::number(reader.lineNumber()),
                                    QString::number(reader.columnNumber()));
                 return ParseFailure;

             } else
                 writer.writeCurrentToken(reader);
         }

         return Success;
     }