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path: root/support/dktools/dk4maac.c
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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: dk4maac.ctr
*/

/**	@file dk4maac.c The dk4maac module.
*/


#line 130 "dk4maac.ctr"

#include "dk4conf.h"
#include "dk4types.h"
#include "dk4error.h"
#include "dk4numco.h"
#include "dk4maac.h"





#line 140 "dk4maac.ctr"



signed char
dk4ma_char_abs(signed char a, dk4_er_t *erp)
{
  if (SCHAR_MIN == a) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  return (signed char)((0 <= a) ? a : ((SCHAR_MIN == a) ? SCHAR_MAX : (0 - a)));
}



signed char
dk4ma_char_add(signed char a, signed char b, dk4_er_t *erp)
{
  if ((0 < a) && (0 < b)) {
    if ((SCHAR_MAX - a) < b) {
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    }
  } else {
    if ((0 > a) && (0 > b)) {
      if (SCHAR_MIN == a) {
        dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
      } else {
        if ((SCHAR_MIN - a) > b) {
          dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
        }
      }
    }
  }
  return (signed char)(a + b);
}



signed char
dk4ma_char_sub(signed char a, signed char b, dk4_er_t *erp)
{

  if ((0 < a) && (0 > b)) {
    if ((SCHAR_MAX + b) < a) {
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    }
  } else {
    if ((0 > a) && (0 < b)) {
      if ((SCHAR_MIN + b) > a) {
        dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
      }
    }
  }
  return (signed char)(a - b);
}



signed char
dk4ma_char_mul(signed char a, signed char b, dk4_er_t *erp)
{
  

#line 201 "dk4maac.ctr"
  if ((0 != a) && (0 != b)) {
    if (SCHAR_MIN == a) {
      if ((signed char)1 != b) {
        dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
      }
    } else {
      if (SCHAR_MIN == b) {
        if ((signed char)1 != a) {
          dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
        }
      } else {
        if (0 < a) {
          if (0 < b) {
	    if ((SCHAR_MAX / a) < b) {
	      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	    }
	  } else {
	    if ((SCHAR_MIN / a) > b) {
	      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	    }
	  }
        } else {
          if (0 < b) {
	    if ((SCHAR_MIN / b) > a) {
	      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	    }
	  } else {
	    if ((SCHAR_MAX / (0 - a)) < (0 - b)) {
	      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	    }
	  }
        }
      }
    }
  }
  

#line 237 "dk4maac.ctr"
  return (signed char)(a * b);
}



signed char
dk4ma_char_div(signed char a, signed char b, dk4_er_t *erp)
{
  signed char	back	=	0;
  if (0 != b) {
    if ((SCHAR_MIN == a) && (-1 == b)) {
      back = SCHAR_MAX;
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    } else {
      back = a / b;
    }
  } else {
    if (0 < a) back = SCHAR_MAX;
    if (0 > b) back = SCHAR_MIN;
    dk4error_set_simple_error_code(erp, DK4_E_MATH_DIVZERO);
  }
  return back;
}



signed char
dm4ma_char_from(dk4_im_t i, dk4_er_t *erp)
{
  if (((dk4_im_t)(SCHAR_MAX) < i) || ((dk4_im_t)(SCHAR_MIN) > i)) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  return ((signed char)i);
}



signed char
dk4ma_char_from_double(double d, dk4_er_t *erp)
{
  signed char back = 0x00;
  if ((double)(SCHAR_MIN) > d) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    back = SCHAR_MIN;
  }
  else {
    if ((double)(SCHAR_MAX) < d) {
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
      back = SCHAR_MAX;
    }
    else {
      back = (signed char)d;
    }
  }
  return back;
}