Line data    Source code

       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             : #include <limits>
      21             : 
      22             : namespace woff2 {
      23             : 
      24             : // Round a value up to the nearest multiple of 4. Don't round the value in the
      25             : // case that rounding up overflows.
      26           0 : template<typename T> T Round4(T value) {
      27           0 :   if (std::numeric_limits<T>::max() - value < 3) {
      28           0 :     return value;
      29             :   }
      30           0 :   return (value + 3) & ~3;
      31             : }
      32             : 
      33             : } // namespace woff2
      34             : 
      35             : #endif  // WOFF2_ROUND_H_