Simplify some argument checking for socket calls

runtime/bin/dartutils.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/dartutils.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
@@ skipping 54 matching lines @@
 
 
 int64_t DartUtils::GetIntegerValue(Dart_Handle value_obj) {
   int64_t value = 0;
   Dart_Handle result = Dart_IntegerToInt64(value_obj, &value);
   if (Dart_IsError(result)) Dart_PropagateError(result);
   return value;
 }
 
 
+int64_t DartUtils::GetIntegerValueCheckRange(
+    Dart_Handle value_obj, int64_t lower, int64_t upper) {
+  int64_t value = DartUtils::GetIntegerValue(value_obj);
+  if (value < lower || upper < value) {
+    Dart_PropagateError(Dart_NewApiError("Value outside expected range"));
+  }
+  return value;
+}
+
+
 intptr_t DartUtils::GetIntptrValue(Dart_Handle value_obj) {
   int64_t value = 0;
   Dart_Handle result = Dart_IntegerToInt64(value_obj, &value);
   if (Dart_IsError(result)) Dart_PropagateError(result);
   if (value < kIntptrMin || kIntptrMax < value) {
-    Dart_PropagateError(Dart_NewApiError("Value outside intptr:t range"));
+    Dart_PropagateError(Dart_NewApiError("Value outside intptr_t range"));
   }
   return static_cast<intptr_t>(value);
 }
 
 
 bool DartUtils::GetInt64Value(Dart_Handle value_obj, int64_t* value) {
   bool valid = Dart_IsInteger(value_obj);
   if (valid) {
     Dart_Handle result = Dart_IntegerFitsIntoInt64(value_obj, &valid);
     if (Dart_IsError(result)) Dart_PropagateError(result);
@@ skipping 958 matching lines @@
       new CObjectString(CObject::NewString(os_error->message()));
   CObjectArray* result = new CObjectArray(CObject::NewArray(3));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
   result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error->code())));
   result->SetAt(2, error_message);
   return result;
 }
 
 }  // namespace bin
 }  // namespace dart