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Side by Side Diff: sky/engine/wtf/CheckedArithmetic.h

Issue 746023002: Make absolute and sort all Sky headers (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 6 years ago
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1 /* 1 /*
2 * Copyright (C) 2011 Apple Inc. All rights reserved. 2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions 5 * modification, are permitted provided that the following conditions
6 * are met: 6 * are met:
7 * 1. Redistributions of source code must retain the above copyright 7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer. 8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright 9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the 10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution. 11 * documentation and/or other materials provided with the distribution.
12 * 12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */ 24 */
25 25
26 #ifndef CheckedArithmetic_h 26 #ifndef CheckedArithmetic_h
27 #define CheckedArithmetic_h 27 #define CheckedArithmetic_h
28 28
29 #include "wtf/Assertions.h" 29 #include "sky/engine/wtf/Assertions.h"
30 #include "wtf/EnumClass.h" 30 #include "sky/engine/wtf/EnumClass.h"
31 #include "wtf/TypeTraits.h" 31 #include "sky/engine/wtf/TypeTraits.h"
32 32
33 #include <stdint.h>
33 #include <limits> 34 #include <limits>
34 #include <stdint.h>
35 35
36 /* Checked<T> 36 /* Checked<T>
37 * 37 *
38 * This class provides a mechanism to perform overflow-safe integer arithmetic 38 * This class provides a mechanism to perform overflow-safe integer arithmetic
39 * without having to manually ensure that you have all the required bounds check s 39 * without having to manually ensure that you have all the required bounds check s
40 * directly in your code. 40 * directly in your code.
41 * 41 *
42 * There are two modes of operation: 42 * There are two modes of operation:
43 * - The default is Checked<T, CrashOnOverflow>, and crashes at the point 43 * - The default is Checked<T, CrashOnOverflow>, and crashes at the point
44 * and overflow has occurred. 44 * and overflow has occurred.
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707 return Checked<U, OverflowHandler>(lhs) * rhs; 707 return Checked<U, OverflowHandler>(lhs) * rhs;
708 } 708 }
709 709
710 } 710 }
711 711
712 using WTF::Checked; 712 using WTF::Checked;
713 using WTF::CheckedState; 713 using WTF::CheckedState;
714 using WTF::RecordOverflow; 714 using WTF::RecordOverflow;
715 715
716 #endif 716 #endif
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