/****************************************************************************/
/*	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 or 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 <nanu-nanu.h>

/** @addtogroup nanu */
/** @{ */

/**
*	Modular addition.
*
*	Adds the second and third elements of the stack together and calculates
*	the remainder after dividing the sum with the topmost element.
*
*	@param	nanu			The natural number machine state descriptor
*
*	@retval	BC_NANU_NANU	The operation succeeded
*	@retval	BC_NANU_SUND	There were less that 3 elements on the stack
*	@retval	BC_NANU_NANN	The topmost element was 0
*	@retval	BC_NANU_OMEM	There's not enough memory in the pool to store
*							the result.
*
*	@par Stack image
*		m a b ...  ==> (a+b)\%m ...
*/

int		BC_NanuMadd( BC_NANU nanu )
{
int		vm, rv;

	if ( ( vm = _bc_NanuStkGet( nanu ) ) < 0 )

		return( _bc_NanuError( nanu, vm ) );

	if ( ( rv = BC_NanuRadd( nanu ) ) < 0 )

		return( rv );

	_bc_NanuStkPut( nanu, vm );
	return( BC_NanuRmod( nanu ) );
}

/** @} */

