base.cc

这是用python语言写的一个数字广播的信号处理工具包。利用它

/* -*- c++ -*- */
/*
 * Copyright 2002 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 <cstdio>
#include <stdexcept>
#include <cmath>
#include "base.h"


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;
}