Example #1
0
static Term
p_mod(Term t1, Term t2 USES_REGS) {
  switch (ETypeOfTerm(t1)) {
  case (CELL)long_int_e:
    switch (ETypeOfTerm(t2)) {
    case (CELL)long_int_e:
      /* two integers */
      {
	Int i1 = IntegerOfTerm(t1);
	Int i2 = IntegerOfTerm(t2);
	Int mod;

	if (i2 == 0)
	  return Yap_ArithError(EVALUATION_ERROR_ZERO_DIVISOR, t2, "X is " Int_FORMAT " mod 0", i1);
	if (i1 == Int_MIN && i2 == -1) {
	  return MkIntTerm(0);
	}
	mod = i1%i2;
	if (mod && (mod ^ i2) < 0)
	  mod += i2;
	RINT(mod);
      }
    case (CELL)double_e:
      return Yap_ArithError(TYPE_ERROR_INTEGER, t2, "mod/2");
    case (CELL)big_int_e:
#ifdef USE_GMP
      return Yap_gmp_mod_int_big(IntegerOfTerm(t1), t2);
#endif
    default:
      RERROR();
      break;
    }
  case (CELL)double_e:
    return Yap_ArithError(TYPE_ERROR_INTEGER, t2, "mod/2");
  case (CELL)big_int_e:
#ifdef USE_GMP
    switch (ETypeOfTerm(t2)) {
    case long_int_e:
      /* modulo between bignum and integer */
      {
	Int i2 = IntegerOfTerm(t2);

	if (i2 == 0)
	  return Yap_ArithError(EVALUATION_ERROR_ZERO_DIVISOR, t2, "X is ... mod 0");
	return Yap_gmp_mod_big_int(t1, i2);
      }
    case (CELL)big_int_e:
      /* two bignums */
      return Yap_gmp_mod_big_big(t1, t2);
    case double_e:
      return Yap_ArithError(TYPE_ERROR_INTEGER, t2, "mod/2");
    default:
      RERROR();
    }
#endif
  default:
    RERROR();
  }
}
Example #2
0
static Term
p_mod(Term t1, Term t2) {
  switch (ETypeOfTerm(t1)) {
  case (CELL)long_int_e:
    switch (ETypeOfTerm(t2)) {
    case (CELL)long_int_e:
      /* two integers */
      {
	Int i1 = IntegerOfTerm(t1);
	Int i2 = IntegerOfTerm(t2);
	Int mod;

	if (i2 == 0) goto zero_divisor;
	if (i1 == Int_MIN && i2 == -1) {
#ifdef USE_GMP
	  return Yap_gmp_add_ints(Int_MAX, 1);	  
#else
	  return Yap_ArithError(EVALUATION_ERROR_INT_OVERFLOW, t1,
		    "// /2 with %d and %d", i1, i2);
#endif
	}
	mod = i1%i2;
	if (mod && (mod ^ i2) < 0)
	  mod += i2;
	RINT(mod);
      }
    case (CELL)double_e:
      return Yap_ArithError(TYPE_ERROR_INTEGER, t2, "mod/2");
    case (CELL)big_int_e:
#ifdef USE_GMP
      return Yap_gmp_mod_int_big(IntegerOfTerm(t1), t2);
#endif
    default:
      RERROR();
      break;
    }
  case (CELL)double_e:
    return Yap_ArithError(TYPE_ERROR_INTEGER, t2, "mod/2");
  case (CELL)big_int_e:
#ifdef USE_GMP
    switch (ETypeOfTerm(t2)) {
    case long_int_e:
      /* modulo between bignum and integer */
      {
	Int i2 = IntegerOfTerm(t2);

	if (i2 == 0) goto zero_divisor;
	return Yap_gmp_mod_big_int(t1, i2);
      }
    case (CELL)big_int_e:
      /* two bignums */
      return Yap_gmp_mod_big_big(t1, t2);
    case double_e:
      return Yap_ArithError(TYPE_ERROR_INTEGER, t2, "mod/2");
    default:
      RERROR();
    }
#endif
  default:
    RERROR();
  }
zero_divisor:
  return Yap_ArithError(EVALUATION_ERROR_ZERO_DIVISOR, t2, "X is mod 0");
}