QtFile.cpp

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/**************************************************************************************/
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/*  Visualization Library                                                             */
/*  http://visualizationlibrary.org                                                   */
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/*  Copyright (c) 2005-2020, Michele Bosi                                             */
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#include <vlQt4/QtFile.hpp>

using namespace vl;

//-----------------------------------------------------------------------------
// QtFile
//-----------------------------------------------------------------------------
QtFile::QtFile(const String& path)
{
  setPath(path);
}
//-----------------------------------------------------------------------------
QtFile::~QtFile()
{
  close();
}
//-----------------------------------------------------------------------------
bool QtFile::open(const String& path, EOpenMode mode)
{
  setPath(path);
  return open(mode);
}
//-----------------------------------------------------------------------------
bool QtFile::open(EOpenMode mode)
{
  if ( isOpen() )
  {
    Log::error("QtFile::open(): file already open.\n");
    return false;
  }

  QIODevice::OpenMode qmode;

  if (mode == OM_ReadOnly) {
    qmode = QIODevice::ReadOnly;
  } else {
    qmode = QIODevice::WriteOnly;
  }

  mQFile.setFileName( path().toStdString().c_str() );
  if ( ! mQFile.open( qmode ) )
  {
    Log::error( Say("QtFile::open(): error opening file '%s'\n") << path() );
    return false;
  }

  return true;
}
//-----------------------------------------------------------------------------
bool QtFile::isOpen() const
{
  return mQFile.isOpen();
}
//-----------------------------------------------------------------------------
void QtFile::close()
{
  mQFile.close();
}
//-----------------------------------------------------------------------------
long long QtFile::size() const
{
  return QFile( path().toStdString().c_str() ).size();
}
//-----------------------------------------------------------------------------
bool QtFile::exists() const
{
  return !path().empty() && QFile::exists( path().toStdString().c_str() );
}
//-----------------------------------------------------------------------------
long long QtFile::read_Implementation(void* buffer, long long byte_count)
{
  if ( ! mQFile.isOpen() )
  {
    Log::error("QtFile::read_Implementation() called on closed file!\n");
    return 0;
  }
  return mQFile.read( (char*)buffer, byte_count );
}
//-----------------------------------------------------------------------------
long long QtFile::write_Implementation(const void* buffer, long long byte_count)
{
  if ( ! mQFile.isOpen() )
  {
    Log::error("QtFile::write_Implementation() called on closed file!\n");
    return 0;
  }
  return mQFile.write( (char*)buffer, byte_count );
}
//-----------------------------------------------------------------------------
long long QtFile::position_Implementation() const
{
  if ( ! mQFile.isOpen() )
  {
    Log::error("QtFile::position_Implementation() called on closed file!\n");
    return -1;
  }
  return mQFile.pos();
}
//-----------------------------------------------------------------------------
bool QtFile::seekSet_Implementation(long long offset)
{
  if ( ! mQFile.isOpen() )
  {
    Log::error("QtFile::seekSet_Implementation() called on closed file!\n");
    return false;
  }
  mQFile.seek(offset);
  return true;
}
//-----------------------------------------------------------------------------
ref<VirtualFile> QtFile::clone() const
{
  ref<QtFile> file = new QtFile;
  file->operator=(*this);
  return file;
}
//-----------------------------------------------------------------------------