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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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732 inline Dest BitCast(const Source& source) { | 732 inline Dest BitCast(const Source& source) { |
733 // Compile time assertion: sizeof(Dest) == sizeof(Source) | 733 // Compile time assertion: sizeof(Dest) == sizeof(Source) |
734 // A compile error here means your Dest and Source have different sizes. | 734 // A compile error here means your Dest and Source have different sizes. |
735 typedef char VerifySizesAreEqual[sizeof(Dest) == sizeof(Source) ? 1 : -1]; | 735 typedef char VerifySizesAreEqual[sizeof(Dest) == sizeof(Source) ? 1 : -1]; |
736 | 736 |
737 Dest dest; | 737 Dest dest; |
738 memcpy(&dest, &source, sizeof(dest)); | 738 memcpy(&dest, &source, sizeof(dest)); |
739 return dest; | 739 return dest; |
740 } | 740 } |
741 | 741 |
| 742 template <class Dest, class Source> |
| 743 inline Dest BitCast(Source* const & source) { |
| 744 return BitCast<Dest>(reinterpret_cast<uintptr_t>(source)); |
| 745 } |
| 746 |
742 } } // namespace v8::internal | 747 } } // namespace v8::internal |
743 | 748 |
744 | |
745 #endif // V8_UTILS_H_ | 749 #endif // V8_UTILS_H_ |
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