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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: dk4maasz.ctr
*/

/**	@file dk4maasz.c The dk4maasz module.
*/


#line 98 "dk4maasz.ctr"

#include "dk4conf.h"
#include "dk4types.h"

#if DK4_HAVE_LIMITS_H
#ifndef LIMITS_H_INCLUDED
#include <limits.h>
#define LIMITS_H_INCLUDED 1
#endif
#endif
#if DK4_HAVE_STDINT_H
#ifndef STDINT_H_INCLUDED
#if defined(__cplusplus) && (!defined(__STDC_LIMIT_MACROS))
#define __STDC_LIMIT_MACROS 1
#endif
#if defined(__cplusplus) && (!defined(__STDC_CONSTANT_MACROS))
#define __STDC_CONSTANT_MACROS 1
#endif
#include <stdint.h>
#define STDINT_H_INCLUDED 1
#endif
#endif

#include "dk4error.h"
#include "dk4maasz.h"
#include "dk4error.h"
#include "dk4numco.h"



size_t
dk4ma_size_t_add(size_t a, size_t b, dk4_er_t *erp)
{
  if ((SIZE_MAX - b) < a) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  return (a + b);
}



size_t
dk4ma_size_t_sub(size_t a, size_t b, dk4_er_t *erp)
{
  if (b > a) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  return (a - b);
}



size_t
dk4ma_size_t_mul(size_t a, size_t b, dk4_er_t *erp)
{
  if ((0 < a) && (0 < b)) {
    if ((SIZE_MAX / a) < b) {
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    }
  }
  return (a * b);
}



size_t
dk4ma_size_t_from(dk4_um_t u, dk4_er_t *erp)
{
	if ((dk4_um_t)(SIZE_MAX) < u) {
		dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	}
	return ((size_t)u);
}



size_t
dk4ma_size_t_from_double(double d, dk4_er_t *erp)
{
	size_t	 back	= 0;

	if ((double)(SIZE_MAX) < d) {
		dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
		back = SIZE_MAX;
	}
	else {
		if (0.0 > d) {
			dk4error_set_simple_error_code(erp,DK4_E_MATH_OVERFLOW);
		}
		else {
			back = (size_t)d;
		}
	}
	return back;
}