code: function hex2num(value) {
    if (value === undefined) throw new Error('Value is undefined');
  
    var buffer = hex2buf(value);
  
    return readFromBuffer(buffer);
  }
docs: Converts an IEEE 754 compliant hexadecimal string into a JavaScript number.
  @param {string} value - IEEE 754 compliant hexadecimal string to be converted
  into a number.
  @return {number} Decoded number.