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/* -*- 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 <cstdlib>
#include <cstdio>
#include <iostream>
#include <string>
#include <fstream>
#include <stdexcept>
#include <cmath>
#include "quicksort_index.h"
#include "interleaver.h"
interleaver::interleaver()
{
d_K=0;
d_INTER.resize(0);
d_DEINTER.resize(0);
}
interleaver::interleaver(const interleaver &INTERLEAVER)
{
d_K=INTERLEAVER.K();
d_INTER=INTERLEAVER.INTER();
d_DEINTER=INTERLEAVER.DEINTER();
}
interleaver::interleaver(int K, const std::vector<int> &INTER)
{
d_K=K;
d_INTER=INTER;
d_DEINTER.resize(d_K);
// generate DEINTER table
for(int i=0;i<d_K;i++) {
d_DEINTER[d_INTER[i]]=i;
}
}
//######################################################################
//# Read an INTERLEAVER specification from a file.
//# Format (hopefully will become more flexible in the future...):
//# K
//# blank line
//# list of space separated K integers from 0 to K-1 in appropriate order
//# optional comments
//######################################################################
interleaver::interleaver(const char *name)
{
FILE *interleaverfile;
if((interleaverfile=fopen(name,"r"))==NULL)
throw std::runtime_error ("file open error in interleaver()");
//printf("file open error in interleaver()\n");
fscanf(interleaverfile,"%d\n",&d_K);
d_INTER.resize(d_K);
d_DEINTER.resize(d_K);
for(int i=0;i<d_K;i++) fscanf(interleaverfile,"%d",&(d_INTER[i]));
// generate DEINTER table
for(int i=0;i<d_K;i++) {
d_DEINTER[d_INTER[i]]=i;
}
}
//######################################################################
//# Generate a random interleaver
//######################################################################
interleaver::interleaver(int K, int seed)
{
d_K=K;
d_INTER.resize(d_K);
d_DEINTER.resize(d_K);
if(seed>=0) srand((unsigned int)seed);
std::vector<int> tmp(d_K);
for(int i=0;i<d_K;i++) {
d_INTER[i]=i;
tmp[i] = rand();
}
quicksort_index <int> (tmp,d_INTER,0,d_K-1);
// generate DEINTER table
for(int i=0;i<d_K;i++) {
d_DEINTER[d_INTER[i]]=i;
}
}
//######################################################################
//# Write an INTERLEAVER specification from a file.
//# Format
//# K
//# blank line
//# list of space separated K integers from 0 to K-1 in appropriate order
//# optional comments
//######################################################################
void interleaver::write_interleaver_txt(std::string filename)
{
std::ofstream interleaver_fname (filename.c_str());
if (!interleaver_fname) {std::cout << "file not found " << std::endl ; exit(-1);}
interleaver_fname << d_K << std::endl;
interleaver_fname << std::endl;
for(int i=0;i<d_K;i++)
interleaver_fname << d_INTER[i] << ' ';
interleaver_fname << std::endl;
interleaver_fname.close();
}
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