Method AddToSparseFile

sparse_read.cpp:99–101

  }

  int AddToSparseFile(struct sparse_file* s, int64_t len, unsigned int block) override {
    return sparse_file_add_fd(s, fd, GetOffset(), len, block);
  }

  int ReadValue(void* ptr, int len) override { return read_all(fd, ptr, len); }