Get String Length for ANSI, utf-8, and Unicode

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How to get the string length in bytes, and in number of characters.

    CkString str;

    str.append("");

    printf("ANSI # Bytes:    %d\n",str.getSizeAnsi());
    printf("utf-8 # Bytes:   %d\n",str.getSizeUtf8());
    printf("Unicode # Bytes: %d\n",str.getSizeUnicode());
    printf("Number of chars: %d\n",str.getNumChars());

    // Prints:
    // ANSI # Bytes:    4
    // utf-8 # Bytes:   8
    // Unicode # Bytes: 8
    // Number of chars: 4