Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #include "IPCMessageUtils.h"
       8             : #include "mozilla/CheckedInt.h"
       9             : 
      10             : namespace IPC {
      11             : 
      12             : bool
      13         100 : ByteLengthIsValid(uint32_t aNumElements, size_t aElementSize, int* aByteLength)
      14             : {
      15         100 :   auto length = mozilla::CheckedInt<int>(aNumElements) * aElementSize;
      16         100 :   if (!length.isValid()) {
      17           0 :     return false;
      18             :   }
      19         100 :   *aByteLength = length.value();
      20         100 :   return true;
      21             : }
      22             : 
      23             : } // namespace IPC