DiskListLocal.cxx

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/*
  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
*/
 
//          
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)
 
// Please feel free to contact me (krumnack@iastate.edu) for bug
// reports, feature suggestions, praise and complaints.
 
 
//
// includes
//
 
#include <SampleHandler/DiskListLocal.h>
 
#include <memory>
#include <TSystem.h>
#include <RootCoreUtils/Assert.h>
#include <RootCoreUtils/ThrowMsg.h>
 
//
// method implementations
//
 
namespace SH
{
  void DiskListLocal :: 
  testInvariant () const
  {
  }
 
 
 
  DiskListLocal :: 
  DiskListLocal (const std::string& val_dir)
    : m_dir (val_dir), m_prefix (val_dir), m_dirp (0)
  {
    RCU_NEW_INVARIANT (this);
  }
 
 
 
  DiskListLocal ::
  DiskListLocal (const std::string& val_dir, const std::string& val_prefix)
    : m_dir (val_dir), m_prefix (val_prefix), m_dirp (0)
  {
    RCU_NEW_INVARIANT (this);
  }
 
 
 
  DiskListLocal :: 
  ~DiskListLocal ()
  {
    RCU_DESTROY_INVARIANT (this);
 
    if (m_dirp)
    {
      gSystem->FreeDirectory (m_dirp);
      m_dirp = 0;
    }
  }
 
 
 
  bool DiskListLocal ::
  getNext ()
  {
    RCU_CHANGE_INVARIANT (this);
 
    if (!m_dirp)
    {
      m_dirp = gSystem->OpenDirectory (m_dir.c_str());
      if (!m_dirp)
    RCU_THROW_MSG ("could not open directory " + m_dir);
    }
 
    const char *subresult = 0;
    do
    {
      subresult = gSystem->GetDirEntry (m_dirp);
      if (subresult == 0)
      {
    gSystem->FreeDirectory (m_dirp);
    m_dirp = 0;
    m_file.clear ();
    return false;
      }
    } while (strcmp (subresult, ".") == 0 || strcmp (subresult, "..") == 0);
    m_file = subresult;
    return subresult;
  }
 
 
 
  std::string DiskListLocal ::
  getPath () const
  {
    RCU_READ_INVARIANT (this);
    return m_prefix + "/" + m_file;
  }
 
 
 
  DiskList *DiskListLocal ::
  doOpenDir () const
  {
    RCU_READ_INVARIANT (this);
 
    std::unique_ptr<DiskListLocal> result
      (new DiskListLocal (m_dir + "/" + m_file, m_prefix + "/" + m_file));
    result->m_dirp = gSystem->OpenDirectory (result->m_dir.c_str());
    if (result->m_dirp)
      return result.release();
    return 0;
  }
 
 
 
  std::string DiskListLocal ::
  getDirname () const
  {
    RCU_READ_INVARIANT (this);
    return m_dir;
  }
}