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// raw_loader.cc
// nono - programme du robot 2004. {{{
//
// Copyright (C) 2004 Nicolas Schodet
//
// Robot APB Team/Efrei 2004.
//        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 "raw_loader.h"
#include "utils/errno_exception.h"

#include <fcntl.h>
#include <unistd.h>

/// Constructeur.
RawLoader::RawLoader (const std::string &file, int width, int height,
		      ImageLoader::ColorSpace colorSpace)
    : file_ (file), width_ (width), height_ (height), colorSpace_ (colorSpace)
{
}

/// Lit une image, retourne le nombre d'octets lus.
int
RawLoader::read (void *buf, int size) const
{
    // Ouverture.
    int fd = open (file_.c_str (), O_RDONLY, 0);
    if (fd == -1)
	throw errno_exception (errno);
    // Lecture.
    int r = ::read (fd, buf, size);
    // Fermeture.
    close (fd);
    return r;
}