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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 static_assert(std::numeric_limits<T>::is_integer, | |
16 "T must be an integer type"); | |
17 return (n > 0) ? ((n + mul - 1) / mul) * mul | |
18 : (n / mul) * mul; | |
19 } | |
20 | |
21 template <typename T> T RoundDown(T n, T mul) { | |
22 static_assert(std::numeric_limits<T>::is_integer, | |
23 "T must be an integer type"); | |
24 return (n > 0) ? (n / mul) * mul | |
25 : (n == 0) ? 0 | |
26 : ((n - mul + 1) / mul) * mul; | |
27 } | |
28 | |
29 } // namespace cc | |
30 | |
31 #endif // CC_BASE_UTIL_H_ | |
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