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/*
Copyright (C) 2015-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4maaus.ctr
*/

/**	@file dk4maaus.c The dk4maaus module.
*/


#line 122 "dk4maaus.ctr"

#include "dk4conf.h"
#include "dk4types.h"
#include "dk4error.h"
#include "dk4numco.h"
#include "dk4maaus.h"


unsigned short
dk4ma_ushort_add(unsigned short a, unsigned short b, dk4_er_t *erp)
{
  if ((USHRT_MAX - a) < b) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  return (unsigned short)(a + b);
}



unsigned short
dk4ma_ushort_sub(unsigned short a, unsigned short b, dk4_er_t *erp)
{
  if (b > a) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  return (unsigned short)(a - b);
}



unsigned short
dk4ma_ushort_mul(unsigned short a, unsigned short b, dk4_er_t *erp)
{
  if (0U < a) {
    if ((USHRT_MAX / a) < b) {
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    }
  }
  return (unsigned short)(a * b);
}



unsigned short
dk4ma_ushort_div(unsigned short a, unsigned short b, dk4_er_t *erp)
{
  if (0U < b) {
    return (unsigned short)(a / b);
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_DIVZERO);
    return (unsigned short)(USHRT_MAX);
  }
}



unsigned short
dk4ma_ushort_from(dk4_um_t u, dk4_er_t *erp)
{
	if ((dk4_um_t)(USHRT_MAX) < u) {
		dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	}
	return ((unsigned short)u);
}



unsigned short
dk4ma_ushort_from_double(double d, dk4_er_t *erp)
{
	unsigned short	back	= 0;
	if ((double)(USHRT_MAX) < d) {
		dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
		back = USHRT_MAX;
	}
	else {
		if (0.0 > d) {
			dk4error_set_simple_error_code(erp,DK4_E_MATH_OVERFLOW);
		}
		else {
			back = (unsigned short)d;
		}
	}
	return back;
}