static public int encodeToByteArray()

in ch-commons-charset/src/main/java/com/cloudhopper/commons/charset/ModifiedUTF8Charset.java [225:273]
41 lines of code
12 McCabe index (conditional complexity)

    static public int encodeToByteArray(CharSequence charSeq, char[] charBuffer, int charOffset, int charLength, byte[] byteBuffer, int byteOffset) {
        int c = 0;
        int bytePos = byteOffset;       // start at byte offset
        int charPos = charOffset;       // start at char offset
        int charAbsLength = charPos + charLength;
        
        if (charBuffer == null) {
            if (charSeq == null) {
                throw new IllegalArgumentException("Both charSeq and charBuffer cannot be null");
            }
            // use charSequence rather than charBuffer
            charOffset = 0;
            charAbsLength = charSeq.length();
        }
        
        // optimized method is only ascii chars used
        for (; charPos < charAbsLength; charPos++) {
            // optimized method for getting char to encode
            if (charBuffer != null) {
                c = charBuffer[charPos];
            } else {
                c = charSeq.charAt(charPos);
            }
            if (!((c >= 0x0000) && (c <= 0x007F)))
                break;
            byteBuffer[bytePos++] = (byte) c;
        }

        for (; charPos < charAbsLength; charPos++) {
            // optimized method for getting char to encode
            if (charBuffer != null) {
                c = charBuffer[charPos];
            } else {
                c = charSeq.charAt(charPos);
            }
            if ((c >= 0x0000) && (c <= 0x007F)) {
                byteBuffer[bytePos++] = (byte) c;
            } else if (c > 0x07FF) {
                byteBuffer[bytePos++] = (byte) (0xE0 | ((c >> 12) & 0x0F));
                byteBuffer[bytePos++] = (byte) (0x80 | ((c >> 6) & 0x3F));
                byteBuffer[bytePos++] = (byte) (0x80 | (c & 0x3F));
            } else {
                byteBuffer[bytePos++] = (byte) (0xC0 | ((c >> 6) & 0x1F));
                byteBuffer[bytePos++] = (byte) (0x80 | (c & 0x3F));
            }
        }
        
        return (bytePos-byteOffset);
    }