Method hexStringToByteArray

oshi-core/src/main/java/oshi/util/ParseUtil.java:282–295

Parse a string of hexadecimal digits into a byte array @param digits The string to be parsed @return a byte array with each pair of characters converted to a byte, or empty array if the string is not valid hex

(String digits)

     *         empty array if the string is not valid hex
     */
    public static byte[] hexStringToByteArray(String digits) {
        int len = digits.length();
        // Check if string is valid hex
        if (!VALID_HEX.matcher(digits).matches() || (len & 0x1) != 0) {
            LOG.warn("Invalid hexadecimal string: {}", digits);
            return new byte[0];
        }
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            data[i / 2] = (byte) (Character.digit(digits.charAt(i), 16) << 4
                    | Character.digit(digits.charAt(i + 1), 16));
        }
        return data;
    }

    /**
     * Parse a human readable ASCII string into a byte array, truncating or padding