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