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// test_data_circular_buffer.cc
// marvin - programme du robot 2006. {{{
//
// Copyright (C) 2006 Dufour J�r�my
//
// 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 "data_circular_buffer.hh"

#include <iostream>
#include <stdexcept>
#include <unistd.h>
#include <time.h>

#define MAX_SIZE_BUFF 101
#define MAX_SIZE_CIRC 99

unsigned
randVal (double max)
{
    return 1 + (int) (max * std::rand () / (RAND_MAX + 1.0));
}

int
main (void)
{
    // Init random
    std::srand (std::time (NULL));
    try
      {
	DataCircularBuffer d (MAX_SIZE_CIRC);
	uint8_t buffOrig[MAX_SIZE_BUFF];
	uint8_t buffRes[MAX_SIZE_BUFF];

 	int i, compt, tmp;
 	// Fill buffer
 	for (i = 0; i < MAX_SIZE_BUFF; i++)
 	    memset (&buffOrig[i], i, 1);

	// Fill circular buffer
	compt = 0;
	for (i = 0; i < 42; i++)
	  {
	    tmp = randVal (MAX_SIZE_BUFF - compt);
	    d.write (&buffOrig[compt], tmp);
	    compt = (tmp + compt) % MAX_SIZE_BUFF;
	  }

	// Read
	compt = 0;
	unsigned res;
	do
	  {
	    tmp = randVal (7.);
	    res = d.read (&buffRes[compt], tmp);
	    compt += tmp;
	  } while (res != 0);

	// Compare
	for (i = 0; i < MAX_SIZE_CIRC - 1; i++)
	  {
	    if (buffRes [i] != buffOrig [(buffRes[0] +i) % MAX_SIZE_BUFF])
		throw std::runtime_error ("Test failed !");
	  }

      }

    catch (const std::exception &e)
      {
	std::cerr << e.what () << std::endl;
	return 1;
      }
    return 0;
}