private int readWithQuotes()

in src/main/java/org/apache/commons/text/StrTokenizer.java [764:843]
48 lines of code
10 McCabe index (conditional complexity)

    private int readWithQuotes(final char[] srcChars, final int start, final int len, final StrBuilder workArea,
                               final List<String> tokenList, final int quoteStart, final int quoteLen) {
        // Loop until we've found the end of the quoted
        // string or the end of the input
        workArea.clear();
        int pos = start;
        boolean quoting = quoteLen > 0;
        int trimStart = 0;

        while (pos < len) {
            // quoting mode can occur several times throughout a string
            // we must switch between quoting and non-quoting until we
            // encounter a non-quoted delimiter, or end of string
            if (quoting) {
                // In quoting mode

                // If we've found a quote character, see if it's
                // followed by a second quote.  If so, then we need
                // to actually put the quote character into the token
                // rather than end the token.
                if (isQuote(srcChars, pos, len, quoteStart, quoteLen)) {
                    if (isQuote(srcChars, pos + quoteLen, len, quoteStart, quoteLen)) {
                        // matched pair of quotes, thus an escaped quote
                        workArea.append(srcChars, pos, quoteLen);
                        pos += quoteLen * 2;
                        trimStart = workArea.size();
                        continue;
                    }

                    // end of quoting
                    quoting = false;
                    pos += quoteLen;
                    continue;
                }

            } else {
                // Not in quoting mode

                // check for delimiter, and thus end of token
                final int delimLen = getDelimiterMatcher().isMatch(srcChars, pos, start, len);
                if (delimLen > 0) {
                    // return condition when end of token found
                    addToken(tokenList, workArea.substring(0, trimStart));
                    return pos + delimLen;
                }

                // check for quote, and thus back into quoting mode
                if (quoteLen > 0 && isQuote(srcChars, pos, len, quoteStart, quoteLen)) {
                    quoting = true;
                    pos += quoteLen;
                    continue;
                }

                // check for ignored (outside quotes), and ignore
                final int ignoredLen = getIgnoredMatcher().isMatch(srcChars, pos, start, len);
                if (ignoredLen > 0) {
                    pos += ignoredLen;
                    continue;
                }

                // check for trimmed character
                // don't yet know if its at the end, so copy to workArea
                // use trimStart to keep track of trim at the end
                final int trimmedLen = getTrimmerMatcher().isMatch(srcChars, pos, start, len);
                if (trimmedLen > 0) {
                    workArea.append(srcChars, pos, trimmedLen);
                    pos += trimmedLen;
                    continue;
                }

            }
            // copy regular character from inside quotes
            workArea.append(srcChars[pos++]);
            trimStart = workArea.size();
        }

        // return condition when end of string found
        addToken(tokenList, workArea.substring(0, trimStart));
        return -1;
    }