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/*
Copyright (C) 2014-2020, 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: dk3maus.ctr
*/

/**	@file dk3maus.c The dk3maus module.
*/


#line 98 "dk3maus.ctr"



#include "dk3ma.h"





#line 106 "dk3maus.ctr"



unsigned short
dk3ma_us_add_ok(unsigned short a, unsigned short b, int *ec)
{
  if (NULL != ec) {
    if ((DK3_US_MAX - a) < b) { *ec = DK3_ERROR_MATH_OVERFLOW; }
  }
  return (a + b);
}



unsigned short
dk3ma_us_sub_ok(unsigned short a, unsigned short b, int *ec)
{
  if (NULL != ec) { if (b > a) { *ec = DK3_ERROR_MATH_OVERFLOW; } }
  return (a - b);
}



unsigned short
dk3ma_us_mul_ok(unsigned short a, unsigned short b, int *ec)
{
  if (NULL != ec) {
    if (0 != a) {
      if ((DK3_US_MAX / a) < b) { *ec = DK3_ERROR_MATH_OVERFLOW; }
    }
  }
  return (a * b);
}



unsigned short
dk3ma_us_div_ok(unsigned short a, unsigned short b, int *ec)
{
  unsigned short	back	=	(unsigned short)0;
  if (0 != b) {
    back = a / b;
  } else {
    if (NULL != ec) { *ec = DK3_ERROR_MATH_DIVZERO; }
    back = DK3_US_MAX;
  }
  return back;
}



unsigned short
dk3ma_us_gcd(unsigned short a, unsigned short b)
{
  unsigned short	h;
  while (0 < b) {
    h = a % b;
    a = b;
    b = h;
  }
  if (0 == a) { a = (unsigned short)1; }
  return a;
}