/*
   Copyright (C) 2003, 2005, 2006 MySQL AB
    All rights reserved. Use is subject to license terms.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef OPENFILES_H
#define OPENFILES_H

#include <Vector.hpp>

class OpenFiles
{
public:
   OpenFiles(){ }
   
  /* Get a pointer to the file with id */
  AsyncFile* find(Uint16 id) const;
  /* Insert file with id */
  bool insert(AsyncFile* file, Uint16 id);
  /* Erase file with id */
  bool erase(Uint16 id);
  /* Get number of open files */
  unsigned size();

  Uint16 getId(unsigned i);
  AsyncFile* getFile(unsigned i);
  
   
private:

  class OpenFileItem {
  public:
    OpenFileItem():  m_file(NULL), m_id(0){};

    AsyncFile* m_file;      
    Uint16 m_id;
  };

  Vector<OpenFileItem> m_files;
};


//*****************************************************************************
inline AsyncFile* OpenFiles::find(Uint16 id) const {
  for (unsigned i = 0; i < m_files.size(); i++){
    if (m_files[i].m_id == id){
      return m_files[i].m_file;
    }
  }
  return NULL;
}

//*****************************************************************************
inline bool OpenFiles::erase(Uint16 id){
  for (unsigned i = 0; i < m_files.size(); i++){
    if (m_files[i].m_id == id){
      m_files.erase(i);
      return true;
    }
  }
  // Item was not found in list
  return false;
}


//*****************************************************************************
inline bool OpenFiles::insert(AsyncFile* file, Uint16 id){
  // Check if file has already been opened
  for (unsigned i = 0; i < m_files.size(); i++){
    if(m_files[i].m_file == NULL)
      continue;

    if(strcmp(m_files[i].m_file->theFileName.c_str(), 
	      file->theFileName.c_str()) == 0)
    {
      BaseString names;
      names.assfmt("open: >%s< existing: >%s<",
		   file->theFileName.c_str(),
		   m_files[i].m_file->theFileName.c_str());
      ERROR_SET(fatal, NDBD_EXIT_AFS_ALREADY_OPEN, names.c_str(),
		"OpenFiles::insert()");    
    }
  }
  
  // Insert the file into vector
  OpenFileItem openFile;
  openFile.m_id = id;
  openFile.m_file = file;
  m_files.push_back(openFile);
  
  return true;
}

//*****************************************************************************
inline Uint16 OpenFiles::getId(unsigned i){
  return m_files[i].m_id; 
}

//*****************************************************************************
inline AsyncFile* OpenFiles::getFile(unsigned i){
  return m_files[i].m_file; 
}

//*****************************************************************************
inline unsigned OpenFiles::size(){
  return m_files.size(); 
}

#endif
