162   auto nwrite = vsnprintf(buf.data(), buf.size(), fmt, ap);  in log_printf()  local
165   if (static_cast<size_t>(nwrite) >= buf.size()) {  in log_printf()
166     nwrite = buf.size() - 1;  in log_printf()
169   buf[nwrite++] = '\n';  in log_printf()
171   while (write(fileno(stderr), buf.data(), nwrite) == -1 && errno == EINTR)  in log_printf()
786     auto nwrite = ngtcp2_conn_writev_stream(  in write_streams()  local
789     if (nwrite < 0) {  in write_streams()
790       switch (nwrite) {  in write_streams()
816                         << ngtcp2_strerror(nwrite);  in write_streams()
819           &last_error_, nwrite, nullptr, 0);  in write_streams()
834     if (nwrite == 0) {  in write_streams()
863     bufpos += nwrite;  in write_streams()
869       gso_size = nwrite;  in write_streams()
872                static_cast<size_t>(nwrite) > gso_size ||  in write_streams()
874                 static_cast<size_t>(nwrite) != gso_size)) {  in write_streams()
877       auto datalen = bufpos - data - nwrite;  in write_streams()
889                         ps.path.remote, ps.path.local, pi, bufpos - nwrite,  in write_streams()
890                         nwrite, 0);  in write_streams()
897         auto data = bufpos - nwrite;  in write_streams()
901                          nwrite, 0);  in write_streams()
904                           nwrite, 0);  in write_streams()
916     if (++pktcnt == max_pktcnt || static_cast<size_t>(nwrite) < gso_size) {  in write_streams()
1501     auto nwrite = ngtcp2_conn_write_connection_close(  in on_handler_delete()  local
1504     if (nwrite < 0) {  in on_handler_delete()
1505       if (nwrite != NGTCP2_ERR_INVALID_STATE) {  in on_handler_delete()
1507                           << ngtcp2_strerror(nwrite);  in on_handler_delete()
1513     conn_close_.resize(nwrite);  in on_handler_delete()
1517                 ps.path.local.addrlen, pi, conn_close_.data(), nwrite, 0);  in on_handler_delete()
1921   auto nwrite = ngtcp2_conn_write_connection_close(  in handle_error()  local
1924   if (nwrite < 0) {  in handle_error()
1926                       << ngtcp2_strerror(nwrite);  in handle_error()
1930   conn_close_.resize(nwrite);  in handle_error()
1932   if (nwrite == 0) {  in handle_error()
1938               ps.path.local.addrlen, pi, conn_close_.data(), nwrite, 0);  in handle_error()