Simplify some argument checking for socket calls

runtime/bin/dartutils.h

 // 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.
 
 #ifndef BIN_DARTUTILS_H_
 #define BIN_DARTUTILS_H_
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 
@@ skipping 63 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(CommandLineOptions);
 };
 
 
 class DartUtils {
  public:
   // Returns the integer value of a Dart object. If the object is not
   // an integer value an API error is propagated.
   static int64_t GetIntegerValue(Dart_Handle value_obj);
+  // Returns the integer value of a Dart object. If the object is not
+  // an integer value or outside the requested range an API error is
+  // propagated.
+  static int64_t GetInt64ValueCheckRange(
+      Dart_Handle value_obj, int64_t lower, int64_t upper);
   // Returns the intptr_t value of a Dart object. If the object is not
   // an integer value or the value is outside the intptr_t range an
   // API error is propagated.
   static intptr_t GetIntptrValue(Dart_Handle value_obj);
   // Checks that the value object is an integer object that fits in a
   // signed 64-bit integer. If it is, the value is returned in the
   // value out parameter and true is returned. Otherwise, false is
   // returned.
   static bool GetInt64Value(Dart_Handle value_obj, int64_t* value);
   // Returns the string value of a Dart object. If the object is not
@@ skipping 441 matching lines @@
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CObjectExternalUint8Array);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_DARTUTILS_H_