public static String encode()

in src/main/java/org/apache/xml/security/utils/Base64.java [363:464]
77 lines of code
19 McCabe index (conditional complexity)

    public static String  encode(byte[] binaryData, int length) {
        if (length < 4) {
            length = Integer.MAX_VALUE;
        }

        if (binaryData == null) {
            return null;
        }

        long lengthDataBits = ((long) binaryData.length) * ((long) EIGHTBIT);
        if (lengthDataBits == 0L) {
            return "";
        }

        long fewerThan24bits = lengthDataBits % (TWENTYFOURBITGROUP);
        int numberTriplets = (int) (lengthDataBits / TWENTYFOURBITGROUP);
        int numberQuartet = fewerThan24bits != 0L ? numberTriplets + 1 : numberTriplets;
        int quartesPerLine = length / 4;
        int numberLines = (numberQuartet - 1) / quartesPerLine;
        char[] encodedData = null;

        encodedData = new char[numberQuartet * 4 + numberLines * 2];

        byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;
        int encodedIndex = 0;
        int dataIndex = 0;
        int i = 0;

        for (int line = 0; line < numberLines; line++) {
            for (int quartet = 0; quartet < 19; quartet++) {
                b1 = binaryData[dataIndex++];
                b2 = binaryData[dataIndex++];
                b3 = binaryData[dataIndex++];

                l = (byte)(b2 & 0x0f);
                k = (byte)(b1 & 0x03);

                byte val1 = ((b1 & SIGN) == 0) ? (byte)(b1 >> 2): (byte)((b1) >> 2 ^ 0xc0);

                byte val2 = ((b2 & SIGN) == 0) ? (byte)(b2 >> 4) : (byte)((b2) >> 4 ^ 0xf0);
                byte val3 = ((b3 & SIGN) == 0) ? (byte)(b3 >> 6) : (byte)((b3) >> 6 ^ 0xfc);


                encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];

                i++;
            }
            encodedData[encodedIndex++] = 0xd;
            encodedData[encodedIndex++] = 0xa;
        }

        for (; i < numberTriplets; i++) {
            b1 = binaryData[dataIndex++];
            b2 = binaryData[dataIndex++];
            b3 = binaryData[dataIndex++];

            l = (byte)(b2 & 0x0f);
            k = (byte)(b1 & 0x03);

            byte val1 = ((b1 & SIGN) == 0) ? (byte)(b1 >> 2) : (byte)((b1) >> 2 ^ 0xc0);

            byte val2 = ((b2 & SIGN) == 0) ? (byte)(b2 >> 4) : (byte)((b2) >> 4 ^ 0xf0);
            byte val3 = ((b3 & SIGN) == 0) ? (byte)(b3 >> 6) : (byte)((b3) >> 6 ^ 0xfc);


            encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
        }

        // form integral number of 6-bit groups
        if (fewerThan24bits == EIGHTBIT) {
            b1 = binaryData[dataIndex];
            k = (byte) (b1 &0x03);
            byte val1 = ((b1 & SIGN) == 0) ? (byte)(b1 >> 2):(byte)((b1) >> 2 ^ 0xc0);
            encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
            encodedData[encodedIndex++] = PAD;
            encodedData[encodedIndex++] = PAD;
        } else if (fewerThan24bits == SIXTEENBIT) {
            b1 = binaryData[dataIndex];
            b2 = binaryData[dataIndex +1 ];
            l = ( byte ) (b2 & 0x0f);
            k = ( byte ) (b1 & 0x03);

            byte val1 = ((b1 & SIGN) == 0) ? (byte)(b1 >> 2) : (byte)((b1) >> 2 ^ 0xc0);
            byte val2 = ((b2 & SIGN) == 0) ? (byte)(b2 >> 4) : (byte)((b2) >> 4 ^ 0xf0);

            encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
            encodedData[encodedIndex++] = PAD;
        }

        //encodedData[encodedIndex] = 0xa;

        return new String(encodedData);
    }