Function getFileSize

src/IO/WithFileSize.cpp:14–22

template <typename T>
static size_t getFileSize(T & in)
{
    if (auto * with_file_size = dynamic_cast<WithFileSize *>(&in))
    {
        return with_file_size->getFileSize();
    }

    throw Exception(ErrorCodes::UNKNOWN_FILE_SIZE, "Cannot find out file size");
}

size_t getFileSizeFromReadBuffer(ReadBuffer & in)
{