src/main/java/com/bazaarvoice/jackson/rison/RisonGenerator.java
protected void _writeBinary(Base64Variant b64variant, byte[] input, int inputPtr, final int inputEnd)
            throws IOException, JsonGenerationException
    {
        // Encoding is by chunks of 3 input, 4 output chars, so:
        int safeInputEnd = inputEnd - 3;
        // Let's also reserve room for possible lf char each round
        int safeOutputEnd = _outputEnd - 6;
        int chunksBeforeLF = b64variant.getMaxLineLength() >> 2;

        // Ok, first we loop through all full triplets of data:
        while (inputPtr <= safeInputEnd) {
            if (_outputTail > safeOutputEnd) { // need to flush
                _flushBuffer();
            }
            // First, mash 3 bytes into lsb of 32-bit int
            int b24 = ((int) input[inputPtr++]) << 8;
            b24 |= ((int) input[inputPtr++]) & 0xFF;
            b24 = (b24 << 8) | (((int) input[inputPtr++]) & 0xFF);
            _outputTail = b64variant.encodeBase64Chunk(b24, _outputBuffer, _outputTail);
            if (--chunksBeforeLF <= 0) {
                // note: RISON does not escape newlines
                _outputBuffer[_outputTail++] = '\n';
                chunksBeforeLF = b64variant.getMaxLineLength() >> 2;
            }
        }

        // And then we may have 1 or 2 leftover bytes to encode
        int inputLeft = inputEnd - inputPtr; // 0, 1 or 2
        if (inputLeft > 0) { // yes, but do we have room for output?
            if (_outputTail > safeOutputEnd) { // don't really need 6 bytes but...
                _flushBuffer();
            }
            int b24 = ((int) input[inputPtr++]) << 16;
            if (inputLeft == 2) {
                b24 |= (((int) input[inputPtr]) & 0xFF) << 8;
            }
            _outputTail = b64variant.encodeBase64Partial(b24, inputLeft, _outputBuffer, _outputTail);
        }
    }
protected void _writeBinary(Base64Variant b64variant, byte[] input, int inputPtr, final int inputEnd)
            throws IOException, JsonGenerationException
    {
        // Encoding is by chunks of 3 input, 4 output chars, so:
        int safeInputEnd = inputEnd - 3;
        // Let's also reserve room for possible lf char each round
        int safeOutputEnd = _outputEnd - 6;
        int chunksBeforeLF = b64variant.getMaxLineLength() >> 2;

        // Ok, first we loop through all full triplets of data:
        while (inputPtr <= safeInputEnd) {
            if (_outputTail > safeOutputEnd) { // need to flush
                _flushBuffer();
            }
            // First, mash 3 bytes into lsb of 32-bit int
            int b24 = ((int) input[inputPtr++]) << 8;
            b24 |= ((int) input[inputPtr++]) & 0xFF;
            b24 = (b24 << 8) | (((int) input[inputPtr++]) & 0xFF);
            _outputTail = b64variant.encodeBase64Chunk(b24, _outputBuffer, _outputTail);
            if (--chunksBeforeLF <= 0) {
                // note: RISON does not escape newlines
                _outputBuffer[_outputTail++] = '\n';
                chunksBeforeLF = b64variant.getMaxLineLength() >> 2;
            }
        }

        // And then we may have 1 or 2 leftover bytes to encode
        int inputLeft = inputEnd - inputPtr; // 0, 1 or 2
        if (inputLeft > 0) { // yes, but do we have room for output?
            if (_outputTail > safeOutputEnd) { // don't really need 6 bytes but...
                _flushBuffer();
            }
            int b24 = ((int) input[inputPtr++]) << 16;
            if (inputLeft == 2) {
                b24 |= (((int) input[inputPtr]) & 0xFF) << 8;
            }
            _outputTail = b64variant.encodeBase64Partial(b24, inputLeft, _outputBuffer, _outputTail);
        }
    }
/*
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/* Internal methods, low-level writing; binary
********************************************************