dom/quota/Utilities.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=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 file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_quota_utilities_h__
   8 #define mozilla_dom_quota_utilities_h__
   9
  10 #include "mozilla/dom/quota/QuotaCommon.h"
  11
  12 BEGIN_QUOTA_NAMESPACE
  13
  14 inline void
  15 IncrementUsage(uint64_t* aUsage, uint64_t aDelta)
  16 {
  17   // Watch for overflow!
  18   if ((UINT64_MAX - *aUsage) < aDelta) {
  19     NS_WARNING("Usage exceeds the maximum!");
  20     *aUsage = UINT64_MAX;
  21   }
  22   else {
  23     *aUsage += aDelta;
  24   }
  25 }
  26
  27 inline bool
  28 PatternMatchesOrigin(const nsACString& aPatternString, const nsACString& aOrigin)
  29 {
  30   // Aren't we smart!
  31   return StringBeginsWith(aOrigin, aPatternString);
  32 }
  33
  34 END_QUOTA_NAMESPACE
  35
  36 #endif // mozilla_dom_quota_utilities_h__