Function ChunkIOVec

security/tls_socket-test.cc:259–271

Return an iovec containing the same data as the buffer 'buf' with the length 'len', but split into random-sized chunks. The chunks are sized randomly between 1 and 'max_chunk_size' bytes.

// but split into random-sized chunks. The chunks are sized randomly between 1 and
// 'max_chunk_size' bytes.
vector<struct iovec> ChunkIOVec(Random* rng, uint8_t* buf, int len, int max_chunk_size) {
  vector<struct iovec> ret;
  uint8_t* p = buf;
  int rem = len;
  while (rem > 0) {
    int len = rng->Uniform(max_chunk_size) + 1;
    len = std::min(len, rem);
    ret.push_back({p, static_cast<size_t>(len)});
    p += len;
    rem -= len;
  }
  return ret;
}

// Regression test for KUDU-2218, a bug in which Writev would improperly handle
// partial writes in non-blocking mode.