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| 1 // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are |
| 4 // met: |
| 5 // |
| 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided |
| 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. |
| 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 |
| 28 #ifndef V8_PREPARSE_DATA_FORMAT_H_ |
| 29 #define V8_PREPARSE_DATA_FORMAT_H_ |
| 30 |
| 31 namespace v8 { |
| 32 namespace internal { |
| 33 |
| 34 // Generic and general data used by preparse data recorders and readers. |
| 35 |
| 36 struct PreparseDataConstants { |
| 37 public: |
| 38 // Layout and constants of the preparse data exchange format. |
| 39 static const unsigned kMagicNumber = 0xBadDead; |
| 40 static const unsigned kCurrentVersion = 6; |
| 41 |
| 42 static const int kMagicOffset = 0; |
| 43 static const int kVersionOffset = 1; |
| 44 static const int kHasErrorOffset = 2; |
| 45 static const int kFunctionsSizeOffset = 3; |
| 46 static const int kSymbolCountOffset = 4; |
| 47 static const int kSizeOffset = 5; |
| 48 static const int kHeaderSize = 6; |
| 49 |
| 50 // If encoding a message, the following positions are fixed. |
| 51 static const int kMessageStartPos = 0; |
| 52 static const int kMessageEndPos = 1; |
| 53 static const int kMessageArgCountPos = 2; |
| 54 static const int kMessageTextPos = 3; |
| 55 |
| 56 static const unsigned char kNumberTerminator = 0x80u; |
| 57 }; |
| 58 |
| 59 |
| 60 } } // namespace v8::internal. |
| 61 |
| 62 #endif // V8_PREPARSE_DATA_FORMAT_H_ |
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