GDCM 2.2.0

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ReadUTF8QtDir.cxx

    /*=========================================================================

      Program: GDCM (Grassroots DICOM). A DICOM library

      Copyright (c) 2006-2011 Mathieu Malaterre
      All rights reserved.
      See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.

         This software is distributed WITHOUT ANY WARRANTY; without even
         the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
         PURPOSE.  See the above copyright notice for more information.

    =========================================================================*/
    /*
     * GDCM API expect a const char * as input for SetFileName
     * In order to use this API from Qt, here is a simple test that
     * shows how to do it in a portable manner:
     *
     * http://doc.qt.nokia.com/latest/qdir.html#navigation-and-directory-operations
     */

    #include "gdcmReader.h"
    #include "gdcmDirectory.h"

    #include <QDir>
    #include <QString>
    #include <QCoreApplication>

    #include <string>
    #include <fstream>

    #include <stdio.h> // fopen

    static int TestBothFuncs(const char *info , const char *ba_str)
    {
      int res = 0;
      FILE *f = fopen( ba_str, "r" );
      if( f )
        {
        std::cout << info << " fopen: " << ba_str << std::endl;
        fclose(f);
        ++res;
        }
      gdcm::Reader reader;
      std::ifstream is( ba_str );
      if( is.is_open() )
        {
        std::cout << info << " is_open: " << ba_str << std::endl;
        ++res;
        }
      reader.SetStream( is );
      if( reader.CanRead() == true )
        {
        std::cout << info << " SetStream/CanRead:" << ba_str << std::endl;
        ++res;
        }
      is.close();
      reader.SetFileName( ba_str );
      if( reader.CanRead() == true )
        {
        std::cout << info << " SetFileName/CanRead:" << ba_str << std::endl;
        ++res;
        }
      return 4 - res;
    }

    static int scanFolder(const char dirname[])
    {
      int res = 0;
      gdcm::Directory dir;
      unsigned int nfiles = dir.Load( dirname, true );
      const gdcm::Directory::FilenamesType &filenames = dir.GetFilenames();

      for( unsigned int i = 0; i < nfiles; ++i )
        {
        const char *ba_str = filenames[i].c_str();
        res += TestBothFuncs("GDCM",ba_str);
        }
      return res;
    }

    static int scanFolderQt(QDir const &dir, QStringList& files)
    {
      int res = 0;
      QFileInfoList children = dir.entryInfoList(QDir::AllEntries|QDir::NoDotAndDotDot);
      for ( int i=0; i<children.count(); i++ ) {
        QFileInfo file = children.at(i);
        if ( file.isDir() == true ) {
          res += scanFolderQt(QDir(file.absoluteFilePath()), files);
          continue;
        }
        // Convert back from the internal representation to 8bits
        // toLocal8Bit() returns by copy. Need to store explicitely the QByteArray
        QByteArray str = file.absoluteFilePath().toLocal8Bit();
        const char *ba_str1 = str.constData();
        res += TestBothFuncs("QString", ba_str1);
        }
      return res;
    }

    int main(int argc, char *argv[])
    {
      // very important:
      QCoreApplication qCoreApp( argc , argv );
      if( argc < 2 )
        {
        std::cerr << argv[0] << " dir " << std::endl;
        return 1;
        }

      int res = 0;
      const char *dirname = argv[1];
      res += scanFolder( dirname );

      QDir dir( QString::fromLocal8Bit(dirname) );
      QStringList files;
      res += scanFolderQt( dir, files);

      if( res )
        std::cerr << "Problem with UTF-8" << std::endl;
      else
        std::cerr << "Success with UTF-8" << std::endl;

      return res;
    }