private CharBuf doAddJsonEscapedString()

in subprojects/groovy-json/src/main/java/org/apache/groovy/json/internal/CharBuf.java [392:517]

• 103 lines of code
• 17 McCabe index (conditional complexity)

    private CharBuf doAddJsonEscapedString(char[] charArray, boolean disableUnicodeEscaping) {
        char[] _buffer = buffer;
        int _location = this.location;

        final byte[] _encoded = encoded;

        final byte[] _charTo = charTo;
        /* We are making a bet that not all chars will be unicode. */
        int ensureThisMuch = charArray.length * 6 + 2;

        int sizeNeeded = (ensureThisMuch) + _location;
        if (sizeNeeded > capacity) {
            int growBy = Math.max((_buffer.length * 2), sizeNeeded);
            _buffer = Chr.grow(buffer, growBy);
            capacity = _buffer.length;
        }

        _buffer[_location] = '"';
        _location++;

        int index = 0;
        while (true) {
            char c = charArray[index];

            if (shouldEscape(c, disableUnicodeEscaping)) {
                   /* We are covering our bet with a safety net.
                      otherwise we would have to have 5x buffer
                      allocated for control chars */
                if (_location + 5 > _buffer.length) {
                    _buffer = Chr.grow(_buffer, 20);
                }

                switch (c) {
                    case '\"':
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = '"';
                        _location++;
                        break;
                    case '\\':
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = '\\';
                        _location++;
                        break;
                    //There is no requirement to escape solidus so we will not.
//                        case '/':
//                            _buffer[_location] = '\\';
//                            _location ++;
//                            _buffer[_location] =  '/';
//                            _location ++;
//                            break;

                    case '\b':
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = 'b';
                        _location++;
                        break;
                    case '\f':
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = 'f';
                        _location++;
                        break;
                    case '\n':
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = 'n';
                        _location++;
                        break;
                    case '\r':
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = 'r';
                        _location++;
                        break;
                    case '\t':
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = 't';
                        _location++;
                        break;
                    default:
                        _buffer[_location] = '\\';
                        _location++;
                        _buffer[_location] = 'u';
                        _location++;
                        if (c <= 255) {
                            _buffer[_location] = '0';
                            _location++;
                            _buffer[_location] = '0';
                            _location++;
                            ByteScanner.encodeByteIntoTwoAsciiCharBytes(c, _encoded);
                            for (int b : _encoded) {
                                _buffer[_location] = (char) b;
                                _location++;
                            }
                        } else {
                            _charTo[1] = (byte) (c);
                            _charTo[0] = (byte) (c >>> 8);

                            for (int charByte : _charTo) {
                                ByteScanner.encodeByteIntoTwoAsciiCharBytes(charByte, _encoded);
                                for (int b : _encoded) {
                                    _buffer[_location] = (char) b;
                                    _location++;
                                }
                            }
                        }
                }
            } else {
                _buffer[_location] = c;
                _location++;
            }

            if (++index >= charArray.length) break;
        }
        _buffer[_location] = '"';
        _location++;

        buffer = _buffer;
        location = _location;

        return this;
    }