/* -*- c++ -*- */
/*
 * Copyright 2002,2012 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * GNU Radio 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 3, or (at your option)
 * any later version.
 *
 * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#include <gnuradio/trellis/base.h>
#include <cmath>
#include <cstdio>
#include <stdexcept>

namespace gr {
namespace trellis {

bool dec2base(unsigned int num, int base, std::vector<int>& s)
{
    int l = s.size();
    unsigned int n = num;
    for (int i = 0; i < l; i++) {
        s[l - i - 1] = n % base; // MSB first
        n /= base;
    }
    if (n != 0) {
        printf("Number %d requires more than %d digits.", num, l);
        return false;
    } else
        return true;
}

unsigned int base2dec(const std::vector<int>& s, int base)
{
    int l = s.size();
    unsigned int num = 0;
    for (int i = 0; i < l; i++)
        num = num * base + s[i];
    return num;
}

bool dec2bases(unsigned int num, const std::vector<int>& bases, std::vector<int>& s)
{
    int l = s.size();
    unsigned int n = num;
    for (int i = 0; i < l; i++) {
        s[l - i - 1] = n % bases[l - i - 1];
        n /= bases[l - i - 1];
    }
    if (n != 0) {
        printf("Number %d requires more than %d digits.", num, l);
        return false;
    } else
        return true;
}

unsigned int bases2dec(const std::vector<int>& s, const std::vector<int>& bases)
{
    int l = s.size();
    unsigned int num = 0;
    for (int i = 0; i < l; i++)
        num = num * bases[i] + s[i];
    return num;
}

} /* namespace trellis */
} /* namespace gr */
