/******************************************************************************
 *
 * Copyright (C) 2010 by
 *
 *               CGTD ICARE
 *               Université des Sciences et Technologies de Lille 1
 *               Polytech'Lille - Bâtiment Eydoux - Bureau E207
 *               Avenue Paul Langevin
 *               59650 Villeneuve d'Ascq Cedex
 *               France
 *
 * Description :
 * -------------
 *
 *   This application copy copy an duplicate an HDF file and compress its datasets
 *
 * Limitations :
 * -------------
 *
 *   - Only supports the GZip compression
 *   - Only supports duplication of :
 *       File attributes
 *       SDS data and attributes
 *
 * Synopsis :
 * ----------
 *
 *   hdfcompress <infile> <outfile> <compression-level>
 *
 * Input :
 * -------
 *
 *   <infile> a valid and existing HDF file [REQUIRED]
 *   <outfile> path to the compressed output file [REQUIRED]
 *   <compression-level> gzip compression level, from 0 to 9 [OPTIONAL]. If not set, 5 is used by default
 *
 * Output :
 * --------
 *
 *   0 if run end normally | 1 if something has gone wrong
 *
 * Prerequisites :
 * ---------------
 *
 *   The HDF4 library must be installed
 *
 * Author :
 * --------
 *
 *  CGTD-ICARE/UDEV Nicolas PASCAL <nicolas.pascal@icare.univ-lille1.fr>
 *
 * License :
 * ---------
 *
 *   This file must be used under the terms of the CeCILL.
 *   This source file is licensed as described in the file COPYING, which
 *   you should have received as part of this distribution.  The terms
 *   are also available at
 *   http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
 *
 * History :
 * --------
 *
 *   v0.0.0 : 04/01/2010
 *    - creation
 *
 *****************************************************************************/

#include "HDFCompressor.h"

#include <cstdlib>

void usage ( const char * app_name )
{
    cerr << "Not enough command line arguments" << endl << endl;
    cerr << "Usage: " << app_name << " <infile> <outfile> <compression-level>" << endl << endl;
    cerr << "where" << endl << endl;
    cerr << "  <infile> a valid and existing HDF file [REQUIRED]" << endl;
    cerr << "  <outfile> path to the compressed output file [REQUIRED]" << endl;
    cerr << "  <compression-level> gzip compression level, from 0 to 9 [OPTIONAL]. If not set, " << DEFAULT_COMPRESSION_LEVEL << " is used by default" << endl << endl;
}

int main ( int argc, char* argv [] )
{

    // check number of command line args
    if ( argc < 3 ) {
        usage ( argv [0] );
        return EXIT_FAILURE;
    }

    // read command line args
    string infile  ( argv [1] );
    string outfile ( argv [2] );
    int comp_level ( DEFAULT_COMPRESSION_LEVEL );
    char * pend;
    if ( argc > 3 )
        comp_level = strtol ( argv [3], &pend, 10 );

    // init compression processor
    HDFCompressor compressor ( infile, outfile, comp_level );
    cout << compressor << endl;

    compressor.run();

    return EXIT_SUCCESS;
}