Rename
diff --git a/examples/client.cc b/examples/client.cc
index 8a74add..a5977c0 100644
--- a/examples/client.cc
+++ b/examples/client.cc
@@ -1278,7 +1278,7 @@
   if (rv != 0) {
     std::cerr << "ngtcp2_conn_read_pkt: " << ngtcp2_strerror(rv) << std::endl;
     if (!last_error_.code) {
-      last_error_ = quicErrorTransport(rv);
+      last_error_ = quic_err_transport(rv);
     }
     disconnect();
     return -1;
@@ -1336,7 +1336,7 @@
     auto rv = send_packet();
     if (rv != NETWORK_ERR_OK) {
       if (rv != NETWORK_ERR_SEND_BLOCKED) {
-        last_error_ = quicErrorTransport(NGTCP2_ERR_INTERNAL);
+        last_error_ = quic_err_transport(NGTCP2_ERR_INTERNAL);
         disconnect();
       }
       return rv;
@@ -1351,7 +1351,7 @@
     if (rv != 0) {
       std::cerr << "ngtcp2_conn_on_loss_detection_timer: "
                 << ngtcp2_strerror(rv) << std::endl;
-      last_error_ = quicErrorTransport(NGTCP2_ERR_INTERNAL);
+      last_error_ = quic_err_transport(NGTCP2_ERR_INTERNAL);
       disconnect();
       return -1;
     }
@@ -1381,7 +1381,7 @@
       if (nwrite < 0) {
         std::cerr << "ngtcp2_conn_write_pkt: " << ngtcp2_strerror(nwrite)
                   << std::endl;
-        last_error_ = quicErrorTransport(nwrite);
+        last_error_ = quic_err_transport(nwrite);
         disconnect();
         return -1;
       }
@@ -1411,7 +1411,7 @@
         if (sveccnt < 0) {
           std::cerr << "nghttp3_conn_writev_stream: "
                     << nghttp3_strerror(sveccnt) << std::endl;
-          last_error_ = quicErrorApplication(sveccnt);
+          last_error_ = quic_err_app(sveccnt);
           disconnect();
           return -1;
         }
@@ -1439,7 +1439,7 @@
             if (rv != 0) {
               std::cerr << "nghttp3_conn_block_stream: " << nghttp3_strerror(rv)
                         << std::endl;
-              last_error_ = quicErrorApplication(rv);
+              last_error_ = quic_err_app(rv);
               disconnect();
               return -1;
             }
@@ -1455,7 +1455,7 @@
             if (rv != 0) {
               std::cerr << "nghttp3_conn_add_write_offset: "
                         << nghttp3_strerror(rv) << std::endl;
-              last_error_ = quicErrorApplication(rv);
+              last_error_ = quic_err_app(rv);
               disconnect();
               return -1;
             }
@@ -1464,7 +1464,7 @@
 
           std::cerr << "ngtcp2_conn_write_stream: " << ngtcp2_strerror(nwrite)
                     << std::endl;
-          last_error_ = quicErrorTransport(nwrite);
+          last_error_ = quic_err_transport(nwrite);
           disconnect();
           return -1;
         }
@@ -1481,7 +1481,7 @@
           if (rv != 0) {
             std::cerr << "nghttp3_conn_add_write_offset: "
                       << nghttp3_strerror(rv) << std::endl;
-            last_error_ = quicErrorApplication(rv);
+            last_error_ = quic_err_app(rv);
             disconnect();
             return -1;
           }
@@ -1980,7 +1980,7 @@
     if (rv != 0) {
       std::cerr << "nghttp3_conn_close_stream: " << nghttp3_strerror(rv)
                 << std::endl;
-      last_error_ = quicErrorApplication(rv);
+      last_error_ = quic_err_app(rv);
       return -1;
     }
   }
@@ -2185,7 +2185,7 @@
   if (nconsumed < 0) {
     std::cerr << "nghttp3_conn_read_stream: " << nghttp3_strerror(nconsumed)
               << std::endl;
-    last_error_ = quicErrorApplication(nconsumed);
+    last_error_ = quic_err_app(nconsumed);
     return -1;
   }
 
@@ -2264,9 +2264,7 @@
 
 void Client::start_wev() { ev_io_start(loop_, &wev_); }
 
-void Client::set_tls_alert(uint8_t alert) {
-  last_error_ = quicErrorTransportTLS(alert);
-}
+void Client::set_tls_alert(uint8_t alert) { last_error_ = quic_err_tls(alert); }
 
 namespace {
 int http_acked_stream_data(nghttp3_conn *conn, int64_t stream_id,
diff --git a/examples/server.cc b/examples/server.cc
index 65bd35f..703942b 100644
--- a/examples/server.cc
+++ b/examples/server.cc
@@ -2040,7 +2040,7 @@
       return NETWORK_ERR_CLOSE_WAIT;
     }
     if (!last_error_.code) {
-      last_error_ = quicErrorTransport(rv);
+      last_error_ = quic_err_transport(rv);
     }
     return handle_error();
   }
@@ -2113,7 +2113,7 @@
       if (sveccnt < 0) {
         std::cerr << "nghttp3_conn_writev_stream: " << nghttp3_strerror(sveccnt)
                   << std::endl;
-        last_error_ = quicErrorApplication(sveccnt);
+        last_error_ = quic_err_app(sveccnt);
         return handle_error();
       }
     }
@@ -2128,7 +2128,7 @@
         if (nwrite < 0) {
           std::cerr << "ngtcp2_conn_write_pkt: " << ngtcp2_strerror(nwrite)
                     << std::endl;
-          last_error_ = quicErrorTransport(nwrite);
+          last_error_ = quic_err_transport(nwrite);
           return handle_error();
         }
         if (nwrite == 0) {
@@ -2168,7 +2168,7 @@
           if (rv != 0) {
             std::cerr << "nghttp3_conn_block_stream: " << nghttp3_strerror(rv)
                       << std::endl;
-            last_error_ = quicErrorApplication(rv);
+            last_error_ = quic_err_app(rv);
             return handle_error();
           }
           should_break = true;
@@ -2182,7 +2182,7 @@
           if (rv != 0) {
             std::cerr << "nghttp3_conn_add_write_offset: "
                       << nghttp3_strerror(rv) << std::endl;
-            last_error_ = quicErrorApplication(rv);
+            last_error_ = quic_err_app(rv);
             return handle_error();
           }
           should_break = true;
@@ -2195,7 +2195,7 @@
 
         std::cerr << "ngtcp2_conn_write_stream: " << ngtcp2_strerror(nwrite)
                   << std::endl;
-        last_error_ = quicErrorTransport(nwrite);
+        last_error_ = quic_err_transport(nwrite);
         return handle_error();
       }
 
@@ -2211,7 +2211,7 @@
         if (rv != 0) {
           std::cerr << "nghttp3_conn_add_write_offset: " << nghttp3_strerror(rv)
                     << std::endl;
-          last_error_ = quicErrorApplication(rv);
+          last_error_ = quic_err_app(rv);
           return handle_error();
         }
       }
@@ -2366,7 +2366,7 @@
   if (nconsumed < 0) {
     std::cerr << "nghttp3_conn_read_stream: " << nghttp3_strerror(nconsumed)
               << std::endl;
-    last_error_ = quicErrorApplication(nconsumed);
+    last_error_ = quic_err_app(nconsumed);
     return -1;
   }
 
@@ -2498,7 +2498,7 @@
     if (rv != 0) {
       std::cerr << "nghttp3_conn_close_stream: " << nghttp3_strerror(rv)
                 << std::endl;
-      last_error_ = quicErrorApplication(rv);
+      last_error_ = quic_err_app(rv);
       return -1;
     }
   }
@@ -2513,7 +2513,7 @@
 }
 
 void Handler::set_tls_alert(uint8_t alert) {
-  last_error_ = quicErrorTransportTLS(alert);
+  last_error_ = quic_err_tls(alert);
 }
 
 namespace {
diff --git a/examples/shared.cc b/examples/shared.cc
index e27ebe6..804f754 100644
--- a/examples/shared.cc
+++ b/examples/shared.cc
@@ -28,7 +28,7 @@
 
 namespace ngtcp2 {
 
-QUICError quicErrorTransport(int liberr) {
+QUICError quic_err_transport(int liberr) {
   if (liberr == NGTCP2_ERR_RECV_VERSION_NEGOTIATION) {
     return {QUICErrorType::TransportVersionNegotiation, 0};
   }
@@ -36,12 +36,12 @@
           ngtcp2_err_infer_quic_transport_error_code(liberr)};
 }
 
-QUICError quicErrorTransportTLS(int alert) {
+QUICError quic_err_tls(int alert) {
   return {QUICErrorType::Transport,
           static_cast<uint16_t>(NGTCP2_CRYPTO_ERROR | alert)};
 }
 
-QUICError quicErrorApplication(int liberr) {
+QUICError quic_err_app(int liberr) {
   return {QUICErrorType::Application,
           nghttp3_err_infer_quic_app_error_code(liberr)};
 }
diff --git a/examples/shared.h b/examples/shared.h
index 3e1dcaa..4503d3d 100644
--- a/examples/shared.h
+++ b/examples/shared.h
@@ -49,11 +49,11 @@
   uint16_t code;
 };
 
-QUICError quicErrorTransport(int liberr);
+QUICError quic_err_transport(int liberr);
 
-QUICError quicErrorTransportTLS(int alert);
+QUICError quic_err_tls(int alert);
 
-QUICError quicErrorApplication(int liberr);
+QUICError quic_err_app(int liberr);
 
 } // namespace ngtcp2