Function ZigZagEncode32

library/cpp/yson/zigzag.h:11–14

    //! Actually taken 'as is' from protobuf/wire_format_lite.h

    inline ui32 ZigZagEncode32(i32 n) {
        // Note: the right-shift must be arithmetic
        return (ui32(n) << 1) ^ (n >> 31);
    }

    inline i32 ZigZagDecode32(ui32 n) {
        return (n >> 1) ^ -static_cast<i32>(n & 1);