--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/spectrum/3rdparty/fftreal/TestWhiteNoiseGen.hpp	Fri Jun 11 14:24:45 2010 +0300
@@ -0,0 +1,91 @@
+/*****************************************************************************
+
+        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 \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/