Qt 5.6 | Qt XML | XML Stream Lint Example | main.cpp Example File

Qt 5.6.2 Reference Documentation

# main.cpp Example File

xmlstreamlint/main.cpp

      /****************************************************************************
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      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the examples of the Qt Toolkit.
      **
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      #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;
      }