/***************************************************************************
    copyright            : (C) 2002-2005 by Stefano Barbato
    email                : stefano@codesink.org

    $Id: qp.cxx,v 1.2 2005/02/23 10:26:14 tat Exp $
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
/** \example qp.cc
 * Usage: qp [-ed] [in_file [out_file]]
 *
 * Quoted-Printable encodes or decodes in_file (or standard input) and writes
 * output to out_file (or standard output)
 */
#include <iostream>
#include <iterator>
#include <fstream>
#include <mimetic/mimetic.h>

using namespace std;
using namespace mimetic;

void usage()
{
    cout << "qp [-ed] [in_file [out_file]]" << endl;
    exit(1);
}

void die_if(bool b, const string& s)
{
    if(b)
    {
        cerr << s << endl;
        exit(-1);
    }
}


int main(int argc, char** argv)
{
    std::ios_base::sync_with_stdio(false);
    bool encoding = 0;
    if(argc < 2)
        usage();

    string opt = argv[1];    
    if(opt == "-e")
        encoding = true;
    else if(opt == "-d")
        encoding = false;
    else
        usage();
        
    filebuf fin;
    filebuf fout;
    if(argc > 2)
    {
        fin.open(argv[2], ios::in);
        die_if(!fin.is_open(), string("unable to open file ")+argv[2]);
    }
    if(argc > 3)
    {
        fout.open(argv[3], ios::out);
        die_if(!fout.is_open(), string("unable to open file ")+argv[3]);
    }
    istream is( fin.is_open() ? &fin : cin.rdbuf());
    ostream os( fout.is_open() ? &fout : cout.rdbuf());
    istreambuf_iterator<char> ibeg(is), iend;
    ostreambuf_iterator<char> out(os);
    if(encoding)
    {
        QP::Encoder qp;    
        encode(ibeg, iend, qp, out);
    } else {
        QP::Decoder qp;    
        decode(ibeg, iend, qp, out);
    }
}