Function ReadVarInt32

library/cpp/yson/varint.cpp:55–63

    }

    int ReadVarInt32(IInputStream* input, i32* value) {
        ui64 varInt;
        int bytesRead = ReadVarUInt64(input, &varInt);
        if (varInt > Max<ui32>()) {
            ythrow yexception() << "The data is too long to read i32";
        }
        *value = ZigZagDecode32(static_cast<ui32>(varInt));
        return bytesRead;
    }

    int ReadVarInt64(IInputStream* input, i64* value) {
        ui64 varInt;