1// Copyright 2013 Google Inc. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14//
15// Helper for rounding
16
17#ifndef WOFF2_ROUND_H_
18#define WOFF2_ROUND_H_
19
20namespace woff2 {
21
22// Round a value up to the nearest multiple of 4. Don't round the value in the
23// case that rounding up overflows.
24template<typename T> T Round4(T value) {
25  if (std::numeric_limits<T>::max() - value < 3) {
26    return value;
27  }
28  return (value + 3) & ~3;
29}
30
31} // namespace woff2
32
33#endif  // WOFF2_ROUND_H_
34