Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project 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 V8_PARSING_PREPARSE_DATA_FORMAT_H_ |
| 6 | #define V8_PARSING_PREPARSE_DATA_FORMAT_H_ |
| 7 | |
| 8 | namespace v8 { |
| 9 | namespace internal { |
| 10 | |
| 11 | // Generic and general data used by preparse data recorders and readers. |
| 12 | |
| 13 | struct PreparseDataConstants { |
| 14 | public: |
| 15 | // Layout and constants of the preparse data exchange format. |
| 16 | static const unsigned kMagicNumber = 0xBadDead; |
| 17 | static const unsigned kCurrentVersion = 11; |
| 18 | |
| 19 | static const int kMagicOffset = 0; |
| 20 | static const int kVersionOffset = 1; |
| 21 | static const int kHasErrorOffset = 2; |
| 22 | static const int kFunctionsSizeOffset = 3; |
| 23 | static const int kSizeOffset = 4; |
| 24 | static const int kHeaderSize = 5; |
| 25 | |
| 26 | // If encoding a message, the following positions are fixed. |
| 27 | static const int kMessageStartPos = 0; |
| 28 | static const int kMessageEndPos = 1; |
| 29 | static const int kMessageArgCountPos = 2; |
| 30 | static const int kParseErrorTypePos = 3; |
| 31 | static const int kMessageTemplatePos = 4; |
| 32 | static const int kMessageArgPos = 5; |
| 33 | |
| 34 | static const unsigned char kNumberTerminator = 0x80u; |
| 35 | }; |
| 36 | |
| 37 | |
| 38 | } // namespace internal |
| 39 | } // namespace v8. |
| 40 | |
| 41 | #endif // V8_PARSING_PREPARSE_DATA_FORMAT_H_ |