private void printWithEscapes()

in src/main/java/org/apache/commons/csv/CSVFormat.java [2007:2056]
42 lines of code
12 McCabe index (conditional complexity)

    private void printWithEscapes(final Reader reader, final Appendable appendable) throws IOException {
        int start = 0;
        int pos = 0;

        @SuppressWarnings("resource") // Temp reader on input reader.
        final ExtendedBufferedReader bufferedReader = new ExtendedBufferedReader(reader);
        final char[] delim = getDelimiterString().toCharArray();
        final int delimLength = delim.length;
        final char escape = getEscapeCharacter().charValue();
        final StringBuilder builder = new StringBuilder(IOUtils.DEFAULT_BUFFER_SIZE);

        int c;
        while (-1 != (c = bufferedReader.read())) {
            builder.append((char) c);
            final boolean isDelimiterStart = isDelimiter((char) c, builder.toString() + new String(bufferedReader.lookAhead(delimLength - 1)), pos, delim,
                    delimLength);
            if (c == CR || c == LF || c == escape || isDelimiterStart) {
                // write out segment up until this char
                if (pos > start) {
                    append(builder.substring(start, pos), appendable);
                    builder.setLength(0);
                    pos = -1;
                }
                if (c == LF) {
                    c = 'n';
                } else if (c == CR) {
                    c = 'r';
                }

                append(escape, appendable);
                append((char) c, appendable);

                if (isDelimiterStart) {
                    for (int i = 1; i < delimLength; i++) {
                        c = bufferedReader.read();
                        append(escape, appendable);
                        append((char) c, appendable);
                    }
                }

                start = pos + 1; // start on the current char after this one
            }
            pos++;
        }

        // write last segment
        if (pos > start) {
            append(builder.substring(start, pos), appendable);
        }
    }