How to use

checkShiftDown

method

in

org.jruby.RubyBignum

/** rb_big_lshift
 *
 */
@Override
public IRubyObject op_lshift(ThreadContext context, IRubyObject other) {
  long shift;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum) other).getLongValue();
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum) other;
      if (otherBignum.value.signum() < 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(context, this);
        if (tmp != null) return tmp;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return op_lshift(context, shift);
}

/** rb_big_rshift
 *
 */
@Override
public IRubyObject op_rshift(ThreadContext context, IRubyObject other) {
  long shift;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum) other).getLongValue();
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum) other;
      if (otherBignum.value.signum() >= 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(context, this);
        if (tmp != null) return tmp;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return op_rshift(context, shift);
}

/** rb_big_rshift
 *
 */
@Override
public IRubyObject op_rshift(ThreadContext context, IRubyObject other) {
  long shift;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum) other).getLongValue();
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum) other;
      if (otherBignum.value.signum() >= 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(context, this);
        if (tmp != null) return tmp;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return op_rshift(context, shift);
}

/** rb_big_lshift
 *
 */
@Override
public IRubyObject op_lshift(ThreadContext context, IRubyObject other) {
  long shift;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum) other).getLongValue();
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum) other;
      if (otherBignum.value.signum() < 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(context, this);
        if (tmp != null) return tmp;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return op_lshift(context, shift);
}

/** rb_big_lshift
 *
 */
@JRubyMethod(name = "<<", required = 1)
public IRubyObject op_lshift(IRubyObject other) {
  long shift;
  boolean neg = false;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum)other).getLongValue();
      if (shift < 0) {
        neg = true;
        shift = -shift;
      }
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum)other;
      if (otherBignum.value.signum() < 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(this);
        if (!tmp.isNil()) return tmp;
        neg = true;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return bignorm(getRuntime(), neg ? value.shiftRight((int)shift) : value.shiftLeft((int)shift));
}

/** rb_big_lshift
 *
 */
@JRubyMethod(name = "<<", required = 1)
public IRubyObject op_lshift(IRubyObject other) {
  long shift;
  boolean neg = false;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum)other).getLongValue();
      if (shift < 0) {
        neg = true;
        shift = -shift;
      }
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum)other;
      if (otherBignum.value.signum() < 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(this);
        if (!tmp.isNil()) return tmp;
        neg = true;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return bignorm(getRuntime(), neg ? value.shiftRight((int)shift) : value.shiftLeft((int)shift));
}

/** rb_big_rshift
 *
 */
@JRubyMethod(name = ">>", required = 1)
public IRubyObject op_rshift(IRubyObject other) {
  long shift;
  boolean neg = false;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum)other).getLongValue();
      if (shift < 0) {
        neg = true;
        shift = -shift;
      }
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum)other;
      if (otherBignum.value.signum() >= 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(this);
        if (!tmp.isNil()) return tmp;
      } else {
        neg = true;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return bignorm(getRuntime(), neg ? value.shiftLeft((int)shift) : value.shiftRight((int)shift));
}

/** rb_big_rshift
 *
 */
@JRubyMethod(name = ">>", required = 1)
public IRubyObject op_rshift(IRubyObject other) {
  long shift;
  boolean neg = false;
  for (;;) {
    if (other instanceof RubyFixnum) {
      shift = ((RubyFixnum)other).getLongValue();
      if (shift < 0) {
        neg = true;
        shift = -shift;
      }
      break;
    } else if (other instanceof RubyBignum) {
      RubyBignum otherBignum = (RubyBignum)other;
      if (otherBignum.value.signum() >= 0) {
        IRubyObject tmp = otherBignum.checkShiftDown(this);
        if (!tmp.isNil()) return tmp;
      } else {
        neg = true;
      }
      shift = big2long(otherBignum);
      break;
    }
    other = other.convertToInteger();
  }
  return bignorm(getRuntime(), neg ? value.shiftLeft((int)shift) : value.shiftRight((int)shift));
}