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[apt.git] / apt-pkg / cachefile.h

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: cachefile.h,v 1.4 2001/02/20 07:03:17 jgg Exp $
/* ######################################################################
   
   CacheFile - Simple wrapper class for opening, generating and whatnot
   
   This class implements a simple 2 line mechanism to open various sorts
   of caches. It can operate as root, as not root, show progress and so on,
   it transparently handles everything necessary.
   
   This means it can rebuild caches from the source list and instantiates
   and prepares the standard policy mechanism.
   
   ##################################################################### */
									/*}}}*/
#ifndef PKGLIB_CACHEFILE_H
#define PKGLIB_CACHEFILE_H

#ifdef __GNUG__
#pragma interface "apt-pkg/cachefile.h"
#endif 

#include <apt-pkg/depcache.h>

class pkgPolicy;
class pkgCacheFile
{
   protected:
   
   MMap *Map;
   pkgCache *Cache;
   pkgDepCache *DCache;
   
   public:

   pkgPolicy *Policy;
      
   // We look pretty much exactly like a pointer to a dep cache
   inline operator pkgCache &() {return *Cache;};
   inline operator pkgCache *() {return Cache;};
   inline operator pkgDepCache &() {return *DCache;};
   inline operator pkgDepCache *() {return DCache;};
   inline pkgDepCache *operator ->() {return DCache;};
   inline pkgDepCache &operator *() {return *DCache;};
   inline pkgDepCache::StateCache &operator [](pkgCache::PkgIterator const &I) {return (*DCache)[I];};
   inline unsigned char &operator [](pkgCache::DepIterator const &I) {return (*DCache)[I];};

   bool Open(OpProgress &Progress,bool WithLock = true);
   void Close();
   
   pkgCacheFile();
   ~pkgCacheFile();
};

#endif