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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_SAFE_NUMERICS_H_ | 5 #ifndef BASE_SAFE_NUMERICS_H_ |
jam
2014/01/17 01:18:55
nit: update
jschuh
2014/01/17 02:37:51
Done.
| |
6 #define BASE_SAFE_NUMERICS_H_ | 6 #define BASE_SAFE_NUMERICS_H_ |
7 | 7 |
8 #include <limits> | 8 #include <limits> |
9 | 9 |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "base/safe_numerics_impl.h" | 11 #include "base/numerics/safe_conversions_impl.h" |
12 | 12 |
13 namespace base { | 13 namespace base { |
14 | 14 |
15 // Convenience function that returns true if the supplied value is in range | 15 // Convenience function that returns true if the supplied value is in range |
16 // for the destination type. | 16 // for the destination type. |
17 template <typename Dst, typename Src> | 17 template <typename Dst, typename Src> |
18 inline bool IsValueInRangeForNumericType(Src value) { | 18 inline bool IsValueInRangeForNumericType(Src value) { |
19 return internal::RangeCheck<Dst>(value) == internal::TYPE_VALID; | 19 return internal::RangeCheck<Dst>(value) == internal::TYPE_VALID; |
20 } | 20 } |
21 | 21 |
22 // checked_numeric_cast<> is analogous to static_cast<> for numeric types, | 22 // checked_cast<> is analogous to static_cast<> for numeric types, |
23 // except that it CHECKs that the specified numeric conversion will not | 23 // except that it CHECKs that the specified numeric conversion will not |
24 // overflow or underflow. NaN source will always trigger a CHECK. | 24 // overflow or underflow. NaN source will always trigger a CHECK. |
25 template <typename Dst, typename Src> | 25 template <typename Dst, typename Src> |
26 inline Dst checked_numeric_cast(Src value) { | 26 inline Dst checked_cast(Src value) { |
27 CHECK(IsValueInRangeForNumericType<Dst>(value)); | 27 CHECK(IsValueInRangeForNumericType<Dst>(value)); |
28 return static_cast<Dst>(value); | 28 return static_cast<Dst>(value); |
29 } | 29 } |
30 | 30 |
31 // saturated_cast<> is analogous to static_cast<> for numeric types, except | 31 // saturated_cast<> is analogous to static_cast<> for numeric types, except |
32 // that the specified numeric conversion will saturate rather than overflow or | 32 // that the specified numeric conversion will saturate rather than overflow or |
33 // underflow. NaN assignment to an integral will trigger a CHECK condition. | 33 // underflow. NaN assignment to an integral will trigger a CHECK condition. |
34 template <typename Dst, typename Src> | 34 template <typename Dst, typename Src> |
35 inline Dst saturated_cast(Src value) { | 35 inline Dst saturated_cast(Src value) { |
36 // Optimization for floating point values, which already saturate. | 36 // Optimization for floating point values, which already saturate. |
(...skipping 16 matching lines...) Expand all Loading... | |
53 return std::numeric_limits<Dst>::max(); | 53 return std::numeric_limits<Dst>::max(); |
54 } | 54 } |
55 | 55 |
56 NOTREACHED(); | 56 NOTREACHED(); |
57 return static_cast<Dst>(value); | 57 return static_cast<Dst>(value); |
58 } | 58 } |
59 | 59 |
60 } // namespace base | 60 } // namespace base |
61 | 61 |
62 #endif // BASE_SAFE_NUMERICS_H_ | 62 #endif // BASE_SAFE_NUMERICS_H_ |
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