/*****************************************************************************
 * Author:   Valient Gough <vgough@pobox.com>
 *
 *****************************************************************************
 * Copyright (c) 2004, Valient Gough
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _Interface_incl_
#define _Interface_incl_

#include <string>
#include "base/interface.pb.h"

namespace encfs {

// check if A implements the interface described by B.
// Note that implements(A, B) is not the same as implements(B, A)
// This checks the current() version and age() against B.current() for
// compatibility.  Even if A.implements(B) is true, B > A may also be
// true, meaning B is a newer revision of the interface then A.
bool implements( const Interface &a, const Interface &b );
Interface makeInterface( const char *name, int major, int minor, int age );

// Read operation
class ConfigVar;
const ConfigVar & operator >> (const ConfigVar &, Interface &);

bool operator != (const Interface &a, const Interface &b);

}  // namespace encfs

#endif