Subversion Repositories lxp32

/*

 * Copyright (c) 2016 by Alex I. Kuznetsov.

 *

 * Part of the LXP32 CPU IP core.

 *

 * This module implements members of the Range class.

 */

#include "range.h"

#include <stdexcept>

Range::Range(): _valid(false) {}

Range::Range(int h,int l): _high(h),_low(l),_valid(true) {

        if(l>h) throw std::runtime_error("Invalid range");

}

void Range::assign(int h,int l) {

        if(l>h) throw std::runtime_error("Invalid range");

        _high=h;

        _low=l;

        _valid=true;

}

void Range::clear() {

        _valid=false;

}

bool Range::valid() const {

        return _valid;

}

int Range::high() const {

        if(!_valid) throw std::runtime_error("Invalid range");

        return _high;

}

int Range::low() const {

        if(!_valid) throw std::runtime_error("Invalid range");

        return _low;

}

int Range::length() const {

        if(!_valid) throw std::runtime_error("Invalid range");

        return _high-_low+1;

}

std::string Range::toString() const {

        if(!_valid) throw std::runtime_error("Invalid range");

        return std::to_string(_high)+" downto "+std::to_string(_low);

}