/*

 * lftp - file transfer program

 *

 * Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)

 *

 * 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/>.

 */

#include <config.h>

#include "Cache.h"

void Cache::Trim()

{

   long sizelimit=res_max_size->Query(0);

   long size=0;

   CacheEntry **scan=&chain;

   while(scan[0])

   {

      if(scan[0]->Stopped())

	 delete replace_value(scan[0],scan[0]->next);

      else

      {

	 size+=scan[0]->EstimateSize();

	 scan=&scan[0]->next;

      }

   }

// printf("Cache::Trim size=%ld, limit=%ld\n",size,sizelimit);

   while(chain && size>sizelimit)

   {

      size-=chain->EstimateSize();

      delete replace_value(chain,chain->next);

   }

}

void Cache::Flush()

{

   while(chain)

      delete replace_value(chain,chain->next);

}

CacheEntry *Cache::IterateFirst()

{

   curr=&chain;

   return *curr;

}

CacheEntry *Cache::IterateNext()

{

   curr=&curr[0]->next;

   return *curr;

}

CacheEntry *Cache::IterateDelete()

{

   delete replace_value(curr[0],curr[0]->next);

   return *curr;

}