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_PREPARSE_DATA_FORMAT_H_
6 #define V8_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 = 9;
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 kIsReferenceErrorPos = 3;
31   static const int kMessageTextPos = 4;
32 
33   static const unsigned char kNumberTerminator = 0x80u;
34 };
35 
36 
37 } }  // namespace v8::internal.
38 
39 #endif  // V8_PREPARSE_DATA_FORMAT_H_
40