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// socket_reader.cc
// robert - programme du robot 2005. {{{
//
// Copyright (C) 2005 Dufour J�r�my
//
// 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.
//
// Contact :
//        Web: %WEB%
//      Email: <dufourj@efrei.fr>
// }}}
#include "socket_reader.hh"

#include "socket/server_socket.hh"
#include "socket/socket_text.hh"
#include "socket/address.hh"
#include "data/data_buffer.hh"

#include <stdexcept>

/// Constructeur, les param�tres doivent �tre pr�cis�s car non pr�sents
/// dans le binaire.
SocketReader::SocketReader (DataInput &data, int width, int height,
			    Image::PixelFormat pixelFormat, int port)
    : data_ (data), width_ (width), height_ (height),
      pixelFormat_ (pixelFormat)
{
    ServerSocket ss (port);
    Address a;
    socketText_ = new SocketText (ss, a);
    socketText_->nonblock ();
}

/// R�cup�re les param�tres de l'image.
void
SocketReader::getParam (int &width, int &height,
			Image::PixelFormat &pixelFormat)
{
    width = width_;
    height = height_;
    pixelFormat = pixelFormat_;
}

/// Lit une image, lance une exception en cas d'erreur.
void
SocketReader::read (uint8_t *buf, unsigned size)
{
    DataBuffer db;
    while (!socketText_->recv ());
    *socketText_ >> db;
    if (db.type () != DataBuffer::Image)
	throw std::runtime_error ("Echec de la transmission");
    if (db.size () != size)
	throw std::runtime_error ("Erreur de taille de message demand�");
    db.read (buf, size);
}