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Side by Side Diff: runtime/vm/boolfield.h

Issue 2481873005: clang-format runtime/vm (Closed)
Patch Set: Merge Created 4 years, 1 month ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #ifndef RUNTIME_VM_BOOLFIELD_H_ 5 #ifndef RUNTIME_VM_BOOLFIELD_H_
6 #define RUNTIME_VM_BOOLFIELD_H_ 6 #define RUNTIME_VM_BOOLFIELD_H_
7 7
8 #include "vm/globals.h" 8 #include "vm/globals.h"
9 9
10 namespace dart { 10 namespace dart {
11 11
12 // BoolField is a template for encoding and decoding a bit inside an 12 // BoolField is a template for encoding and decoding a bit inside an
13 // unsigned machine word. 13 // unsigned machine word.
14 template<int position> 14 template <int position>
15 class BoolField { 15 class BoolField {
16 public: 16 public:
17 // Returns a uword with the bool value encoded. 17 // Returns a uword with the bool value encoded.
18 static uword encode(bool value) { 18 static uword encode(bool value) {
19 ASSERT(position < sizeof(uword)); 19 ASSERT(position < sizeof(uword));
20 return static_cast<uword>((value ? 1U : 0) << position); 20 return static_cast<uword>((value ? 1U : 0) << position);
21 } 21 }
22 22
23 // Extracts the bool from the value. 23 // Extracts the bool from the value.
24 static bool decode(uword value) { 24 static bool decode(uword value) {
25 ASSERT(position < sizeof(uword)); 25 ASSERT(position < sizeof(uword));
26 return (value & (1U << position)) != 0; 26 return (value & (1U << position)) != 0;
27 } 27 }
28 28
29 // Returns a uword with the bool field value encoded based on the 29 // Returns a uword with the bool field value encoded based on the
30 // original value. Only the single bit corresponding to this bool 30 // original value. Only the single bit corresponding to this bool
31 // field will be changed. 31 // field will be changed.
32 static uword update(bool value, uword original) { 32 static uword update(bool value, uword original) {
33 ASSERT(position < sizeof(uword)); 33 ASSERT(position < sizeof(uword));
34 const uword mask = 1U << position; 34 const uword mask = 1U << position;
35 return value ? original | mask : original & ~mask; 35 return value ? original | mask : original & ~mask;
36 } 36 }
37 }; 37 };
38 38
39 } // namespace dart 39 } // namespace dart
40 40
41 #endif // RUNTIME_VM_BOOLFIELD_H_ 41 #endif // RUNTIME_VM_BOOLFIELD_H_
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