File: conf_int.h

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/*
**      SWISH++
**      conf_int.h
**
**      Copyright (C) 1998  Paul J. Lucas
**
**      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 2 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, write to the Free Software
**      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef conf_int_H
#define conf_int_H

// system
#include <climits>                      /* for INT_MAX */
#include <string>

// local
#include "conf_var.h"

//*****************************************************************************
//
// SYNOPSIS
//
        template<> class conf<int> : public conf_var
//
// DESCRIPTION
//
//      A conf<int> is-a conf_var for containing the value of an integer
//      configuration variable.
//
//*****************************************************************************
{
public:
    conf<int>& operator++() {
        ++value_;
        return *this;
    }
    conf<int> operator++( int ) {
        conf<int> tmp = *this;
        ++value_;
        return tmp;
    }
    conf<int>& operator--() {
        --value_;
        return *this;
    }
    conf<int> operator--( int ) {
        conf<int> tmp = *this;
        --value_;
        return tmp;
    }
    operator int() const { return value_; }
protected:
    conf( char const *name, int default_value, int min = 0, int max = INT_MAX );
    conf<int>& operator=( int );
    CONF_VAR_ASSIGN_OPS( conf<int> )

    virtual void    parse_value( char *line );
private:
    int const       default_value_, min_, max_;
    int             value_;

    virtual void    reset() { value_ = default_value_; }
};

#define CONF_INT_ASSIGN_OPS(T)              \
    T& operator=( int i ) {                 \
        conf<int>::operator=( i );          \
        return *this;                       \
    }                                       \
    T& operator=( std::string const &s ) {  \
        conf<int>::operator=( s );          \
        return *this;                       \
    }                                       \
    T& operator=( char const *s ) {         \
        conf<int>::operator=( s );          \
        return *this;                       \
    }

#endif  /* conf_int_H */
/* vim:set et sw=4 ts=4: */