src/preparse-data-format.h

// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef V8_PREPARSE_DATA_FORMAT_H_
#define V8_PREPARSE_DATA_FORMAT_H_

namespace v8 {
namespace internal {

// Generic and general data used by preparse data recorders and readers.

struct PreparseDataConstants {
 public:
  // Layout and constants of the preparse data exchange format.
  static const unsigned kMagicNumber = 0xBadDead;
  static const unsigned kCurrentVersion = 7;

  static const int kMagicOffset = 0;
  static const int kVersionOffset = 1;
  static const int kHasErrorOffset = 2;
  static const int kFunctionsSizeOffset = 3;
  static const int kSymbolCountOffset = 4;
  static const int kSizeOffset = 5;
  static const int kHeaderSize = 6;

  // If encoding a message, the following positions are fixed.
  static const int kMessageStartPos = 0;
  static const int kMessageEndPos = 1;
  static const int kMessageArgCountPos = 2;
  static const int kMessageTextPos = 3;

  static const unsigned char kNumberTerminator = 0x80u;
};


} }  // namespace v8::internal.

#endif  // V8_PREPARSE_DATA_FORMAT_H_