Method overflowInParse

output/java_guava/1.4.17/UnsignedLongs.java:348–362

Returns true if (current radix) + digit is a number too large to be represented by an unsigned long. This is useful for detecting overflow while parsing a string representation of a number. Does not verify whether supplied radix is valid, passing an invalid radix will give undefined results or an Ar

(long current, int digit, int radix)

   */

  private static boolean overflowInParse(long current, int digit, int radix) {
    if (current >= 0) {
      if (current < maxValueDivs[radix]) {
        return false;
      }
      if (current > maxValueDivs[radix]) {
        return true;
      }
      // current == maxValueDivs[radix]
      return (digit > maxValueMods[radix]);
    }

    // current < 0: high bit is set
    return true;
  }

  /**
   * Returns a string representation of x, where x is treated as unsigned.