| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/extensions/api/declarative_webrequest/request_stage.h" |
| |
| #include "base/basictypes.h" |
| |
| namespace extensions { |
| |
| const unsigned int kActiveStages = ON_BEFORE_REQUEST | |
| ON_BEFORE_SEND_HEADERS | |
| ON_HEADERS_RECEIVED | |
| ON_AUTH_REQUIRED; |
| |
| // HighestBit<n> computes the highest bit of |n| in compile time, provided that |
| // |n| is a positive compile-time constant. |
| template <long unsigned int n> |
| struct HighestBit { |
| COMPILE_ASSERT(n > 0, argument_is_not_a_positive_compile_time_constant); |
| enum { VALUE = HighestBit<(n >> 1)>::VALUE << 1 }; |
| }; |
| template <> |
| struct HighestBit<1> { |
| enum { VALUE = 1 }; |
| }; |
| |
| const unsigned int kLastActiveStage = HighestBit<kActiveStages>::VALUE; |
| |
| } // namespace extensions |