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 20 namespace 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. 24 template<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
