Module: Kernel

Defined in:
(unknown)

Instance Method Summary collapse

Instance Method Details

#MPFR(*args) ⇒ Object

Return new MPFR instance. The same arguments as MPFR.new is acceptable.



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# File 'ext/mpfr/ruby_mpfr.c', line 445

static VALUE r_mpfr_global_new(int argc, VALUE *argv, VALUE self)
{
  MPFR *ptr;
  VALUE val;
  mp_prec_t prec;
  mp_rnd_t rnd;
  switch(argc){
  case 0:
    r_mpfr_make_struct_init(val, ptr);
    mpfr_set_nan(ptr);
    return val;
  case 1:
    prec = mpfr_get_default_prec();
    rnd = mpfr_get_default_rounding_mode();
    break;
  case 2:
    if (SYMBOL_P(argv[1])) {
      rnd = r_mpfr_rnd_from_value(argv[1]);
      prec = mpfr_get_default_prec();
    } else if (FIXNUM_P(argv[1])) {
      prec = NUM2INT(argv[1]);
      rnd = mpfr_get_default_rounding_mode();
    } else {
      rb_raise(rb_eArgError, "Invalid argument.");
    }
    break;
  case 3:
    r_mpfr_get_rnd_prec_from_optional_arguments(&rnd, &prec, 1, 3, argc, argv);
    break;
  default:
    rb_raise(rb_eArgError, "Invalid number of arguments.");
    break;
  }
  if(MPFR_P(argv[0])){
    MPFR *ptr_obj;
    r_mpfr_get_struct(ptr_obj, argv[0]);
    r_mpfr_make_struct_init2(val, ptr, prec);
    mpfr_set(ptr, ptr_obj, rnd);
  }else{
    switch(TYPE(argv[0])){
    case T_STRING:
      r_mpfr_make_struct_init2(val, ptr, prec);
      mpfr_set_str(ptr, StringValuePtr(argv[0]), 10, rnd);
      break;
    case T_FLOAT:
      r_mpfr_make_struct_init2(val, ptr, prec);
      mpfr_set_d(ptr, NUM2DBL(argv[0]), rnd);
      break;
    case T_FIXNUM:
      r_mpfr_make_struct_init2(val, ptr, prec);
      mpfr_set_si(ptr, FIX2LONG(argv[0]), rnd);
      break;
    case T_BIGNUM:
      r_mpfr_make_struct_init2(val, ptr, prec);
      r_mpfr_convert_to_str_set(ptr, argv[0], rnd);
      break;
    default:
      val = r_mpfr_robj_to_mpfr(argv[0], argc - 1, argv + 1);
      break;
    }
  }
  return val;
}