Method parseLong

java/org/apache/tomcat/util/buf/Ascii.java:91–108

Parses an unsigned long from the specified sub array of bytes. @param b the bytes to parse @param off the start offset of the bytes @param len the length of the bytes @return the long value @exception NumberFormatException if the long format was invalid

(byte[] b, int off, int len)

     * @exception NumberFormatException if the long format was invalid
     */
    public static long parseLong(byte[] b, int off, int len) throws NumberFormatException {
        int c;

        if (b == null || len <= 0 || !isDigit(c = b[off++])) {
            throw new NumberFormatException();
        }

        long n = c - '0';
        while (--len > 0) {
            if (isDigit(c = b[off++]) && (n < OVERFLOW_LIMIT || (n == OVERFLOW_LIMIT && (c - '0') < 8))) {
                n = n * 10 + c - '0';
            } else {
                throw new NumberFormatException();
            }
        }

        return n;
    }
}