/* $Id$ */
/*
 * Cantus Tag Editor
 * Copyright © 2002-2004 by Samuel Abels <spam@debain.org>
 * Copyright © 2007 by Tim Huetz <tim.huetz@futures-net.de>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 **/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <cantus/fileinfocache.h>

//#define _DEBUG_


/******************************************************************************
 * Constructor/Destructor
 ******************************************************************************/
/* Constructor.
 */
FileInfoCache::FileInfoCache(void)
{
}


/* Destructor.
 */
FileInfoCache::~FileInfoCache(void)
{
#ifdef _DEBUG_
  printf("FileInfoCache::~FileInfoCache(): Called.\n");
#endif
}


/******************************************************************************
 * Public
 ******************************************************************************/
/* Stores a copy of the pluginlist in the object.
 * This is required because the object invokes the FileInfo read function,
 * which needs a plugin as an argument.
 */
FileInfo* FileInfoCache::operator[](std::string filename)
{
#ifdef _DEBUG_
  printf("FileInfoCache::operator[]: Called.\n");
#endif
  glong     inode = inodemap[filename];  // Try to get the file from the cache.
  FileInfo *info  = cache[inode];
  if (info)
    return info;
  info  = new FileInfo(filename);        // Not in the cache, so read it.
  inode = info->get_inode();
  if (inode == 0) {                      // Stat failed, so return.
    signal_file_stat_failed.emit(info);
    return NULL;
  }
  inodemap[filename] = inode;            // Stat success, so hold.
  cache[inode]       = info;
  return info;
}


/******************************************************************************
 * Private
 ******************************************************************************/