Converting to Unicode

gistfile1.java

    /*
     * Converts unicodes to encoded \uxxxx and escapes special characters
     * with a preceding slash
     */
    private static String saveConvert(String theString, boolean escapeSpace, boolean escapeUnicode) {
	int len = theString.length();
	int bufLen = len * 2;
	if (bufLen < 0) {
	    bufLen = Integer.MAX_VALUE;
	}
	StringBuffer outBuffer = new StringBuffer(bufLen);

	for (int x = 0; x < len; x++) {
	    char aChar = theString.charAt(x);
	    // Handle common case first, selecting largest block that
	    // avoids the specials below
	    if ((aChar > 61) && (aChar < 127)) {
		if (aChar == '\\') {
		    outBuffer.append('\\');
		    outBuffer.append('\\');
		    continue;
		}
		outBuffer.append(aChar);
		continue;
	    }
	    switch (aChar) {
	    case ' ':
		if (x == 0 || escapeSpace)
		    outBuffer.append('\\');
		outBuffer.append(' ');
		break;
	    case '\t':
		outBuffer.append('\\');
		outBuffer.append('t');
		break;
	    case '\n':
		outBuffer.append('\\');
		outBuffer.append('n');
		break;
	    case '\r':
		outBuffer.append('\\');
		outBuffer.append('r');
		break;
	    case '\f':
		outBuffer.append('\\');
		outBuffer.append('f');
		break;
	    case '=': // Fall through
	    case ':': // Fall through
	    case '#': // Fall through
	    case '!':
		outBuffer.append('\\');
		outBuffer.append(aChar);
		break;
	    default:
		if (((aChar < 0x0020) || (aChar > 0x007e)) & escapeUnicode) {
		    outBuffer.append('\\');
		    outBuffer.append('u');
		    outBuffer.append(Integer.toHexString((aChar >> 12) & 0xF));
		    outBuffer.append(Integer.toHexString((aChar >> 8) & 0xF));
		    outBuffer.append(Integer.toHexString((aChar >> 4) & 0xF));
		    outBuffer.append(Integer.toHexString(aChar & 0xF));
		} else {
		    outBuffer.append(aChar);
		}
	    }
	}
	return outBuffer.toString();
    }