/*****************************************************************************

        TestWhiteNoiseGen.hpp

        Copyright (c) 2005 Laurent de Soras

--- Legal stuff ---

This library is free software; 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; either

version 2.1 of the License, or (at your option) any later version.

This library 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

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*Tab=3***********************************************************************/

#if defined (TestWhiteNoiseGen_CURRENT_CODEHEADER)

	#error Recursive inclusion of TestWhiteNoiseGen code header.

#endif

#define	TestWhiteNoiseGen_CURRENT_CODEHEADER

#if ! defined (TestWhiteNoiseGen_CODEHEADER_INCLUDED)

#define	TestWhiteNoiseGen_CODEHEADER_INCLUDED

/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

template <class DT>

TestWhiteNoiseGen <DT>::TestWhiteNoiseGen ()

:	_rand_state (0)

{

	_rand_state = reinterpret_cast <StateType> (this);

}

template <class DT>

void	TestWhiteNoiseGen <DT>::generate (DataType data_ptr [], long len)

{

	assert (data_ptr != 0);

	assert (len > 0);

	const DataType	one = static_cast <DataType> (1);

	const DataType	mul = one / static_cast <DataType> (0x80000000UL);

	long				pos = 0;

	do

	{

		const DataType	x = static_cast <DataType> (_rand_state & 0xFFFFFFFFUL);

		data_ptr [pos] = x * mul - one;

		_rand_state = _rand_state * 1234567UL + 890123UL;

		++ pos;

	}

	while (pos < len);

}

/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

#endif	// TestWhiteNoiseGen_CODEHEADER_INCLUDED

#undef TestWhiteNoiseGen_CURRENT_CODEHEADER

/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/