/** * Encodes up to the first three bytes of array <var>threeBytes</var> * and returns a four-byte array in Base64 notation. * The actual number of significant bytes in your array is * given by <var>numSigBytes</var>. * The array <var>threeBytes</var> needs only be as big as * <var>numSigBytes</var>. * Code can reuse a byte array by passing a four-byte array as <var>b4</var>. * * @param b4 A reusable byte array to reduce array instantiation * @param threeBytes the array to convert * @param numSigBytes the number of significant bytes in your array * @return four byte array in Base64 notation. * @since 1.5.1 */ private static byte[] encode3to4(byte[] b4, byte[] threeBytes, int numSigBytes) { encode3to4(threeBytes, 0, numSigBytes, b4, 0); return b4; } // end encode3to4
for (; d < len2; d += 3, e += 4) encode3to4(source, d + off, 3, outBuff, e); encode3to4(source, d + off, len - d, outBuff, e); e += 4;