c++ - Transfer specified number of bytes from one stringstream to another -


given

  • a size_t n (typically valued in millions)
  • a stringstream a, containing many more n bytes
  • a pre-existing empty stringstream b

what might way transfer n bytes a b?

i think following work

std::string s; s.resize(n); a.read(&s[0], n); b << s.rdbuf();

but isn't there way skip intermediate string s , transfer n bytes directly a b?


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