1 // Copyright 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CC_BASE_UTIL_H_ 6 #define CC_BASE_UTIL_H_ 7 8 #include <limits> 9 10 #include "base/basictypes.h" 11 12 namespace cc { 13 14 template <typename T> T RoundUp(T n, T mul) { 15 COMPILE_ASSERT(std::numeric_limits<T>::is_integer, type_must_be_integral); 16 return (n > 0) ? ((n + mul - 1) / mul) * mul 17 : (n / mul) * mul; 18 } 19 20 template <typename T> T RoundDown(T n, T mul) { 21 COMPILE_ASSERT(std::numeric_limits<T>::is_integer, type_must_be_integral); 22 return (n > 0) ? (n / mul) * mul 23 : (n == 0) ? 0 24 : ((n - mul + 1) / mul) * mul; 25 } 26 27 } // namespace cc 28 29 #endif // CC_BASE_UTIL_H_ 30
