src: remove redundant code for uv_handle_type

PR-URL: nodejs#49061
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Darshan Sen <[email protected]>
Reviewed-By: Gerhard Stöbich <[email protected]>
Reviewed-By: Deokjin Kim <[email protected]>

Author: Jungku Lee

src/node_util.cc

@@ -304,74 +304,44 @@ void WeakReference::DecRef(const FunctionCallbackInfo<Value>& args) {
       v8::Number::New(args.GetIsolate(), weak_ref->reference_count_));
 }
 
-static void GuessHandleType(const FunctionCallbackInfo<Value>& args) {
-  Environment* env = Environment::GetCurrent(args);
-  int fd;
-  if (!args[0]->Int32Value(env->context()).To(&fd)) return;
-  CHECK_GE(fd, 0);
-
-  uv_handle_type t = uv_guess_handle(fd);
+static uint32_t GetUVHandleTypeCode(const uv_handle_type type) {
   // TODO(anonrig): We can use an enum here and then create the array in the
   // binding, which will remove the hard-coding in C++ and JS land.
-  uint32_t type{0};
 
   // Currently, the return type of this function corresponds to the index of the
   // array defined in the JS land. This is done as an optimization to reduce the
   // string serialization overhead.
-  switch (t) {
+  switch (type) {
     case UV_TCP:
-      type = 0;
-      break;
+      return 0;
     case UV_TTY:
-      type = 1;
-      break;
+      return 1;
     case UV_UDP:
-      type = 2;
-      break;
+      return 2;
     case UV_FILE:
-      type = 3;
-      break;
+      return 3;
     case UV_NAMED_PIPE:
-      type = 4;
-      break;
+      return 4;
     case UV_UNKNOWN_HANDLE:
-      type = 5;
-      break;
+      return 5;
     default:
       ABORT();
   }
+}
+
+static void GuessHandleType(const FunctionCallbackInfo<Value>& args) {
+  Environment* env = Environment::GetCurrent(args);
+  int fd;
+  if (!args[0]->Int32Value(env->context()).To(&fd)) return;
+  CHECK_GE(fd, 0);
 
-  args.GetReturnValue().Set(type);
+  uv_handle_type t = uv_guess_handle(fd);
+  args.GetReturnValue().Set(GetUVHandleTypeCode(t));
 }
 
 static uint32_t FastGuessHandleType(Local<Value> receiver, const uint32_t fd) {
   uv_handle_type t = uv_guess_handle(fd);
-  uint32_t type{0};
-
-  switch (t) {
-    case UV_TCP:
-      type = 0;
-      break;
-    case UV_TTY:
-      type = 1;
-      break;
-    case UV_UDP:
-      type = 2;
-      break;
-    case UV_FILE:
-      type = 3;
-      break;
-    case UV_NAMED_PIPE:
-      type = 4;
-      break;
-    case UV_UNKNOWN_HANDLE:
-      type = 5;
-      break;
-    default:
-      ABORT();
-  }
-
-  return type;
+  return GetUVHandleTypeCode(t);
 }
 
 CFunction fast_guess_handle_type_(CFunction::Make(FastGuessHandleType));