// Copyright (c) 1997  Utrecht University (The Netherlands),
// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
// and Tel-Aviv University (Israel).  All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// 
//
// Author(s)     : Andreas Fabri


#ifndef CGAL_IO_C
#define CGAL_IO_C

#include <CGAL/basic.h>
#include <CGAL/IO/io.h>
#include <CGAL/assertions.h>

CGAL_BEGIN_NAMESPACE

int IO::mode = std::ios::xalloc();


IO::Mode
get_mode(std::ios& i)
{
    return static_cast<IO::Mode>(i.iword(IO::mode));
}

IO::Mode
set_ascii_mode(std::ios& i)
{
    IO::Mode m = get_mode(i);
    i.iword(IO::mode) = IO::ASCII;
    return m;
}


IO::Mode
set_binary_mode(std::ios& i)
{
    IO::Mode m = get_mode(i);
    i.iword(IO::mode) = IO::BINARY;
    return m;
}


IO::Mode
set_pretty_mode(std::ios& i)
{
    IO::Mode m = get_mode(i);
    i.iword(IO::mode) = IO::PRETTY;
    return m;
}

IO::Mode
set_benchmark_mode(std::ios& i)
{
    set_mode( i, IO::BENCHMARK );
}


IO::Mode
set_mode(std::ios& i, IO::Mode m)
{
    IO::Mode old = get_mode(i);
    i.iword(IO::mode) = m;
    return old;
}

bool
is_pretty(std::ios& i)
{
    return i.iword(IO::mode) == IO::PRETTY;
}

bool
is_ascii(std::ios& i)
{
    return i.iword(IO::mode) == IO::ASCII;
}


bool
is_binary(std::ios& i)
{
    return i.iword(IO::mode) == IO::BINARY;
}

bool
is_benchmark(std::ios& i)
{
    return i.iword(IO::mode) == IO::BENCHMARK;
}

const char* mode_name( IO::Mode m) {
    static const char* const names[] = {"ASCII", "PRETTY", "BENCHMARK", "BINARY" };
    CGAL_assertion( IO::ASCII <= m && m <= IO::BINARY );
    return names[m];
}


CGAL_END_NAMESPACE

#endif // CGAL_IO_C