/****************************************************************************/
/*	Copyright (c) 2009, Bendor Research Pty. Ltd. All rights reserved.		*/
/*	This software is released under the GNU General Public License, version	*/
/*	3, with the exemptions that 1) the header files installed by this 	 	*/
/*	package can be included in closed-source code and 2) the libraries		*/
/*	built by this package can be statically linked into a closed-source 	*/
/*	binary. See the file LICENSE for the details.							*/
/*	This software is provided "AS IS", without any warranty or guarantee.	*/
/*	By using this software you acknowledge that neither Bendor Research nor	*/
/*	any of its personnel or affiliates can be held liable for any damages,	*/
/*	including, but not limited to, loss of business, loss of money, loss of */
/*	life, loss of reputation, arising out of this software being faulty or	*/
/*	not performing as advertised, even if Bendor Research was aware of such	*/
/*	faults in the software. You use this software at your own risk, any and */
/*	all liabilities that arise out of your using this software are strictly	*/
/*	yours.																	*/
/****************************************************************************/

#include <math.h>
#include <libm.h>

/** @addtogroup ieee */
/** @{ */

/**
*	Changes a signum of a double to that of an other double.
*
*	The returned value will have the same absolute value as the first
*	argument and the same signum as the second argument. If the first
*	argument is NaN, then the returned value will be NaN, if the second
*	argument is NaN, then the behaviour is undefined.
*
*	@param	a	The number of the absolute value is used
*	@param	b	The number of which the signum is used
*
*	@return		A value that has the absolute value of \p a and
*				the signum of \p b.
*/

float	copysignf( float a, float b )
{
unsigned	x;

	x = _blm_ftoul( a );

	if ( (int) _blm_ftoul( b ) < 0 )

		return( _blm_ultof( x | 0x80000000 ) );
	else
		return( _blm_ultof( x & 0x7fffffff ) );
}

/** @} */

