function indexShiftJISPointerFor(code_point) {
    // 1. Let index be index jis0208 excluding all pointers in the
    // range 8272 to 8835.
    var pointer = indexPointerFor(code_point, index('jis0208'));
    if (pointer === null || inRange(pointer, 8272, 8835))
      return null;

    // 2. Return the index pointer for code point in index.
    return pointer;
  }
@param {number} code_point The |code_point| to search for in the shift_jis index.
@return {?number} The code point corresponding to |pointer| in |index|,
    or null if |code point| is not in the shift_jis index.