Method DoFinish

tools/archiver/main.cpp:30–33

            Buf.reserve(stride);
        }
        void DoFinish() override {
            WriteBuf();
            Flush();
        }
        void DoWrite(const void* data, size_t len) override {
            for (const char* p = (const char*)data; len > 0; ++p, --len) {
                Buf.append(*p);