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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
license		=	bsd



%%	header

/**	@file
	Arithmetic operations on dk4_um_t.
	
	CRT on Windows: Optional.
*/

#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif

#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif

#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif



#ifdef __cplusplus
extern "C" {
#endif

/**	Addition.
        @param	a	Left operand.
        @param	b	Right operand.
        @param	erp	Error report, may be NULL.
        @return	Result on success, least significant result bits
        on overflow (see ec component of erp).
        
	Error codes: DK4_E_OVERFLOW.
*/
dk4_um_t
dk4ma_um_add(dk4_um_t a, dk4_um_t b, dk4_er_t *erp);

/**	Subtraction.
        @param	a	Left operand.
        @param	b	Right operand.
        @param	erp	Error report, may be NULL.
        @return	Result on success, least significant result bits
        on overflow (see ec component of erp).
        
	Error codes: DK4_E_OVERFLOW.
*/
dk4_um_t
dk4ma_um_sub(dk4_um_t a, dk4_um_t b, dk4_er_t *erp);

/**	Multiplication.
        @param	a	Left factor.
        @param	b	right factor.
        @param	erp	Error report, may be NULL.
        @return	Result on success, least significant
        bits on overflow (see ec component of erp).
        
	Error codes: DK4_E_OVERFLOW.
*/
dk4_um_t
dk4ma_um_mul(dk4_um_t a, dk4_um_t b, dk4_er_t *erp);

/**	Division.
        @param	a	Counter (left operand).
        @param	b	Denominator (right operand).
        @param	erp	Error report, may be NULL.
        @return	Division result on success,
        DK4_UM_MAX on division by zero
        (see the ec component of erp).
        
	Error codes: DK4_E_DIVZERO.
*/
dk4_um_t
dk4ma_um_div(dk4_um_t a, dk4_um_t b, dk4_er_t *erp);

#ifdef __cplusplus
}
#endif


%%	module

#include "dk4conf.h"
#include "dk4types.h"
#include "dk4error.h"
#include "dk4numco.h"

#if DK4_HAVE_INTMAX_T
#include "dk4maamu.h"
#else
#if DK4_HAVE_LONG_LONG
#include "dk4maalu.h"
#else
#include "dk4maaul.h"
#endif
#endif

#include "dk4maadu.h"


dk4_um_t
dk4ma_um_add(dk4_um_t a, dk4_um_t b, dk4_er_t *erp)
{
#if DK4_HAVE_INTMAX_T
  return (dk4ma_uintmax_t_add(a, b, erp));
#else
#if DK4_HAVE_LONG_LONG
  return (dk4ma_ull_add(a, b, erp));
#else
  return (dk4ma_ulong_add(a, b, erp));
#endif
#endif
}



dk4_um_t
dk4ma_um_sub(dk4_um_t a, dk4_um_t b, dk4_er_t *erp)
{
#if DK4_HAVE_INTMAX_T
  return (dk4ma_uintmax_t_sub(a, b, erp));
#else
#if DK4_HAVE_LONG_LONG
  return (dk4ma_ull_sub(a, b, erp));
#else
  return (dk4ma_ulong_sub(a, b, erp));
#endif
#endif
}



dk4_um_t
dk4ma_um_mul(dk4_um_t a, dk4_um_t b, dk4_er_t *erp)
{
#if DK4_HAVE_INTMAX_T
  return (dk4ma_uintmax_t_mul(a, b, erp));
#else
#if DK4_HAVE_LONG_LONG
  return (dk4ma_ull_mul(a, b, erp));
#else
  return (dk4ma_ulong_mul(a, b, erp));
#endif
#endif
}



dk4_um_t
dk4ma_um_div(dk4_um_t a, dk4_um_t b, dk4_er_t *erp)
{
#if DK4_HAVE_INTMAX_T
  return (dk4ma_uintmax_t_div(a, b,erp));
#else
#if DK4_HAVE_LONG_LONG
  return (dk4ma_ull_div(a, b, erp));
#else
  return (dk4ma_ulong_div(a, b, erp));
#endif
#endif
}