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// data_input_file.cc
// robert - programme du robot 2005. {{{
//
// Copyright (C) 2005 Nicolas Schodet
//
// Robot APB Team/Efrei 2005.
//        Web: http://assos.efrei.fr/robot/
//      Email: robot AT efrei DOT fr
//
// 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.
// 
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// }}}
#include "data_input_file.hh"
#include "utils/errno_exception.hh"

/// Constructeur.
DataInputFile::DataInputFile (const std::string &name)
    : name_ (name), file_ (name.c_str ())
{
    if (!file_)
	throw errno_exception (name_, errno);
}

/// Lit des donn�es. M�me convention que le read de la libc, mais lance
/// une exception en cas d'erreur.
unsigned
DataInputFile::read (uint8_t *buf, unsigned size)
{
    file_.read (reinterpret_cast<char *> (buf), size);
    if (file_.bad ())
	throw errno_exception (name_, errno);
    return file_.gcount ();
}