v8::internal::ParseData Class Reference

#include <parser.h>

Collaboration diagram for v8::internal::ParseData:

Public Member Functions
	ParseData (ScriptData *script_data)
void	Initialize ()
FunctionEntry	GetFunctionEntry (int start)
int	FunctionCount ()
bool	HasError ()
unsigned *	Data ()

Private Member Functions
bool	IsSane ()
unsigned	Magic ()
unsigned	Version ()
int	FunctionsSize ()
int	Length () const
	DISALLOW_COPY_AND_ASSIGN (ParseData)

Private Attributes
ScriptData *	script_data_
int	function_index_

Detailed Description

Definition at line 63 of file parser.h.

Constructor & Destructor Documentation

ParseData()

v8::internal::ParseData::ParseData ( ScriptData *  script_data )

inlineexplicit

Definition at line 65 of file parser.h.

                                              : script_data_(script_data) {
    CHECK(IsAligned(script_data->length(), sizeof(unsigned)));
    CHECK(IsSane());
  }

References CHECK, v8::internal::IsAligned(), IsSane(), and v8::internal::ScriptData::length().

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Member Function Documentation

Data()

unsigned* v8::internal::ParseData::Data ( )

inline

Definition at line 75 of file parser.h.

                   {  // Writable data as unsigned int array.
    return reinterpret_cast<unsigned*>(const_cast<byte*>(script_data_->data()));
  }

References v8::internal::ScriptData::data(), and script_data_.

Referenced by FunctionsSize(), GetFunctionEntry(), HasError(), Magic(), and Version().

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DISALLOW_COPY_AND_ASSIGN()

v8::internal::ParseData::DISALLOW_COPY_AND_ASSIGN ( ParseData  )

private

FunctionCount()

int v8::internal::ParseData::FunctionCount

(

)

Definition at line 200 of file parser.cc.

                             {
  int functions_size = FunctionsSize();
  if (functions_size < 0) return 0;
  if (functions_size % FunctionEntry::kSize != 0) return 0;
  return functions_size / FunctionEntry::kSize;
}

References FunctionsSize().

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FunctionsSize()

int v8::internal::ParseData::FunctionsSize ( )

private

Definition at line 252 of file parser.cc.

                             {
  return static_cast<int>(Data()[PreparseDataConstants::kFunctionsSizeOffset]);
}

References Data(), and v8::internal::PreparseDataConstants::kFunctionsSizeOffset.

Referenced by FunctionCount(), and IsSane().

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GetFunctionEntry()

FunctionEntry v8::internal::ParseData::GetFunctionEntry

(

int

start

)

Definition at line 186 of file parser.cc.

                                                   {
  // The current pre-data entry must be a FunctionEntry with the given
  // start position.
  if ((function_index_ + FunctionEntry::kSize <= Length()) &&
      (static_cast<int>(Data()[function_index_]) == start)) {
    int index = function_index_;
    function_index_ += FunctionEntry::kSize;
    Vector<unsigned> subvector(&(Data()[index]), FunctionEntry::kSize);
    return FunctionEntry(subvector);
  }
  return FunctionEntry();
}

References Data(), function_index_, and Length().

Referenced by v8::internal::Parser::SkipLazyFunctionBody().

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HasError()

bool v8::internal::ParseData::HasError

(

)

Definition at line 237 of file parser.cc.

                         {
  return Data()[PreparseDataConstants::kHasErrorOffset];
}

References Data(), and v8::internal::PreparseDataConstants::kHasErrorOffset.

Referenced by IsSane().

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Initialize()

void v8::internal::ParseData::Initialize

(

)

Definition at line 228 of file parser.cc.

                           {
  // Prepares state for use.
  int data_length = Length();
  if (data_length >= PreparseDataConstants::kHeaderSize) {
    function_index_ = PreparseDataConstants::kHeaderSize;
  }
}

References function_index_, v8::internal::PreparseDataConstants::kHeaderSize, and Length().

Referenced by v8::internal::Parser::ParseProgram().

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IsSane()

bool v8::internal::ParseData::IsSane ( )

private

Definition at line 208 of file parser.cc.

                       {
  // Check that the header data is valid and doesn't specify
  // point to positions outside the store.
  int data_length = Length();
  if (data_length < PreparseDataConstants::kHeaderSize) return false;
  if (Magic() != PreparseDataConstants::kMagicNumber) return false;
  if (Version() != PreparseDataConstants::kCurrentVersion) return false;
  if (HasError()) return false;
  // Check that the space allocated for function entries is sane.
  int functions_size = FunctionsSize();
  if (functions_size < 0) return false;
  if (functions_size % FunctionEntry::kSize != 0) return false;
  // Check that the total size has room for header and function entries.
  int minimum_size =
      PreparseDataConstants::kHeaderSize + functions_size;
  if (data_length < minimum_size) return false;
  return true;
}

References FunctionsSize(), HasError(), v8::internal::PreparseDataConstants::kCurrentVersion, v8::internal::PreparseDataConstants::kHeaderSize, v8::internal::PreparseDataConstants::kMagicNumber, Length(), Magic(), and Version().

Referenced by ParseData().

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Length()

int v8::internal::ParseData::Length ( ) const

inlineprivate

Definition at line 84 of file parser.h.

                     {
    // Script data length is already checked to be a multiple of unsigned size.
    return script_data_->length() / sizeof(unsigned);
  }

References v8::internal::ScriptData::length(), and script_data_.

Referenced by GetFunctionEntry(), Initialize(), and IsSane().

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Magic()

unsigned v8::internal::ParseData::Magic ( )

private

Definition at line 242 of file parser.cc.

                          {
  return Data()[PreparseDataConstants::kMagicOffset];
}

References Data(), and v8::internal::PreparseDataConstants::kMagicOffset.

Referenced by IsSane().

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Version()

unsigned v8::internal::ParseData::Version ( )

private

Definition at line 247 of file parser.cc.

                            {
  return Data()[PreparseDataConstants::kVersionOffset];
}

References Data(), and v8::internal::PreparseDataConstants::kVersionOffset.

Referenced by IsSane().

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Member Data Documentation

function_index_

int v8::internal::ParseData::function_index_

private

Definition at line 90 of file parser.h.

Referenced by GetFunctionEntry(), and Initialize().

script_data_

ScriptData* v8::internal::ParseData::script_data_

private

Definition at line 89 of file parser.h.

Referenced by Data(), and Length().

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The documentation for this class was generated from the following files:

• /mnt/V8SourceCode/src/parser.h
• /mnt/V8SourceCode/src/parser.cc