Upstream version 9.38.198.0
[platform/framework/web/crosswalk.git] / src / v8 / src / preparse-data.cc
1 // Copyright 2010 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 #include "include/v8stdint.h"
6 #include "src/base/logging.h"
7 #include "src/compiler.h"
8 #include "src/globals.h"
9 #include "src/hashmap.h"
10 #include "src/preparse-data.h"
11 #include "src/preparse-data-format.h"
12
13 namespace v8 {
14 namespace internal {
15
16
17 CompleteParserRecorder::CompleteParserRecorder()
18     : function_store_(0) {
19   preamble_[PreparseDataConstants::kMagicOffset] =
20       PreparseDataConstants::kMagicNumber;
21   preamble_[PreparseDataConstants::kVersionOffset] =
22       PreparseDataConstants::kCurrentVersion;
23   preamble_[PreparseDataConstants::kHasErrorOffset] = false;
24   preamble_[PreparseDataConstants::kFunctionsSizeOffset] = 0;
25   preamble_[PreparseDataConstants::kSizeOffset] = 0;
26   DCHECK_EQ(5, PreparseDataConstants::kHeaderSize);
27 #ifdef DEBUG
28   prev_start_ = -1;
29 #endif
30 }
31
32
33 void CompleteParserRecorder::LogMessage(int start_pos,
34                                         int end_pos,
35                                         const char* message,
36                                         const char* arg_opt,
37                                         bool is_reference_error) {
38   if (HasError()) return;
39   preamble_[PreparseDataConstants::kHasErrorOffset] = true;
40   function_store_.Reset();
41   STATIC_ASSERT(PreparseDataConstants::kMessageStartPos == 0);
42   function_store_.Add(start_pos);
43   STATIC_ASSERT(PreparseDataConstants::kMessageEndPos == 1);
44   function_store_.Add(end_pos);
45   STATIC_ASSERT(PreparseDataConstants::kMessageArgCountPos == 2);
46   function_store_.Add((arg_opt == NULL) ? 0 : 1);
47   STATIC_ASSERT(PreparseDataConstants::kIsReferenceErrorPos == 3);
48   function_store_.Add(is_reference_error ? 1 : 0);
49   STATIC_ASSERT(PreparseDataConstants::kMessageTextPos == 4);
50   WriteString(CStrVector(message));
51   if (arg_opt != NULL) WriteString(CStrVector(arg_opt));
52 }
53
54
55 void CompleteParserRecorder::WriteString(Vector<const char> str) {
56   function_store_.Add(str.length());
57   for (int i = 0; i < str.length(); i++) {
58     function_store_.Add(str[i]);
59   }
60 }
61
62
63 ScriptData* CompleteParserRecorder::GetScriptData() {
64   int function_size = function_store_.size();
65   int total_size = PreparseDataConstants::kHeaderSize + function_size;
66   unsigned* data = NewArray<unsigned>(total_size);
67   preamble_[PreparseDataConstants::kFunctionsSizeOffset] = function_size;
68   MemCopy(data, preamble_, sizeof(preamble_));
69   if (function_size > 0) {
70     function_store_.WriteTo(Vector<unsigned>(
71         data + PreparseDataConstants::kHeaderSize, function_size));
72   }
73   DCHECK(IsAligned(reinterpret_cast<intptr_t>(data), kPointerAlignment));
74   ScriptData* result = new ScriptData(reinterpret_cast<byte*>(data),
75                                       total_size * sizeof(unsigned));
76   result->AcquireDataOwnership();
77   return result;
78 }
79
80
81 } }  // namespace v8::internal.