/*
 * Copyright (c) 2002, Stefan Farfeleder <e0026813@stud3.tuwien.ac.at>
 * $Id: server_util.h,v 1.2 2002/09/17 17:15:05 stefan Exp $
 */
#ifndef JFK_SERVER_UTIL_H
#define JFK_SERVER_UTIL_H

#include <string>

#include "object_s.h"
#include "objhandle.h"

#ifdef HAVE_STD_COMPARE
#define COMPARE(a, b, c)    compare(a, b, c)
#else
/* broken libstdc++ has the parameters wrong */
#define COMPARE(a, b, c)    compare(c, a, b)
#endif

namespace JFK {

namespace server {

/* A pair two objects, the first of which can be used like a normal pointer,
 * the second can save the state of the first. */
class objpair
{
public:
    objpair() {}
    objpair(objhandle objh);
    objpair(const objpair& op);

    void        do_backup()     { oh[1].assign(oh[0]); }
    objhandle   get_backup()    { return oh[1]; }

    object*     operator->()    { return oh[0].p(); }
    operator objhandle()        { return oh[0]; }

    objpair&    operator=(const objpair& op);

private:
    objhandle       oh[2];
};

typedef objhandle (*creator_fp)(const std::string&);

struct lvlhandler
{   
    std::string     name;   /* <attribute-name> or <object-name> */
    double*         attr;   /* where the attribute is stored or NULL */
    creator_fp      cf;     /* pointer to function that creates such an
                               object or NULL */
    double          min;
    double          max;    /* the value must be in [min,max] */

    bool operator==(const std::string& s) const;    /* used for std::find() */
};

objhandle   new_obstacle(const std::string& attributes);
objhandle   new_item(const std::string& attributes);
objhandle   new_weapon(const std::string& attributes);

bool        name_ok(const std::string& name);

}

}

#endif