v8::internal::Utf16CharacterStream Class Reference

#include <scanner.h>

Inheritance diagram for v8::internal::Utf16CharacterStream:

Collaboration diagram for v8::internal::Utf16CharacterStream:

Public Member Functions
	Utf16CharacterStream ()
virtual	~Utf16CharacterStream ()
uc32	Advance ()
unsigned	pos () const
unsigned	SeekForward (unsigned code_unit_count)
virtual void	PushBack (int32_t code_unit)=0

Protected Member Functions
virtual bool	ReadBlock ()=0
virtual unsigned	SlowSeekForward (unsigned code_unit_count)=0

Protected Attributes
const uint16_t *	buffer_cursor_
const uint16_t *	buffer_end_
unsigned	pos_

Static Protected Attributes
static const uc32	kEndOfInput = -1

Detailed Description

Definition at line 45 of file scanner.h.

Constructor & Destructor Documentation

Utf16CharacterStream()

v8::internal::Utf16CharacterStream::Utf16CharacterStream ( )

inline

Definition at line 47 of file scanner.h.

: pos_(0) { }

~Utf16CharacterStream()

virtual v8::internal::Utf16CharacterStream::~Utf16CharacterStream ( )

inlinevirtual

Definition at line 48 of file scanner.h.

{ }

Member Function Documentation

Advance()

uc32 v8::internal::Utf16CharacterStream::Advance ( )

inline

Definition at line 53 of file scanner.h.

                        {
    if (buffer_cursor_ < buffer_end_ || ReadBlock()) {
      pos_++;
      return static_cast<uc32>(*(buffer_cursor_++));
    }
    // Note: currently the following increment is necessary to avoid a
    // parser problem! The scanner treats the final kEndOfInput as
    // a code unit with a position, and does math relative to that
    // position.
    pos_++;
 
    return kEndOfInput;
  }

References buffer_cursor_, buffer_end_, kEndOfInput, pos_, and ReadBlock().

Referenced by v8::internal::Scanner::Advance().

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pos()

unsigned v8::internal::Utf16CharacterStream::pos ( ) const

inline

Definition at line 69 of file scanner.h.

{ return pos_; }

References pos_.

Referenced by v8::internal::Scanner::SeekForward(), and v8::internal::Scanner::source_pos().

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PushBack()

virtual void v8::internal::Utf16CharacterStream::PushBack ( int32_t  code_unit )

pure virtual

Implemented in v8::internal::ExternalTwoByteStringUtf16CharacterStream, and v8::internal::BufferedUtf16CharacterStream.

Referenced by v8::internal::Scanner::PushBack().

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ReadBlock()

virtual bool v8::internal::Utf16CharacterStream::ReadBlock ( )

protectedpure virtual

Implemented in v8::internal::ExternalTwoByteStringUtf16CharacterStream, and v8::internal::BufferedUtf16CharacterStream.

Referenced by Advance().

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SeekForward()

unsigned v8::internal::Utf16CharacterStream::SeekForward ( unsigned  code_unit_count )

inline

Definition at line 75 of file scanner.h.

                                                        {
    unsigned buffered_chars =
        static_cast<unsigned>(buffer_end_ - buffer_cursor_);
    if (code_unit_count <= buffered_chars) {
      buffer_cursor_ += code_unit_count;
      pos_ += code_unit_count;
      return code_unit_count;
    }
    return SlowSeekForward(code_unit_count);
  }

References buffer_cursor_, buffer_end_, pos_, and SlowSeekForward().

Referenced by v8::internal::Scanner::SeekForward().

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SlowSeekForward()

virtual unsigned v8::internal::Utf16CharacterStream::SlowSeekForward ( unsigned  code_unit_count )

protectedpure virtual

Implemented in v8::internal::ExternalTwoByteStringUtf16CharacterStream, and v8::internal::BufferedUtf16CharacterStream.

Referenced by SeekForward().

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Member Data Documentation

buffer_cursor_

const uint16_t* v8::internal::Utf16CharacterStream::buffer_cursor_

protected

Definition at line 102 of file scanner.h.

Referenced by Advance(), v8::internal::BufferedUtf16CharacterStream::BufferedUtf16CharacterStream(), v8::internal::BufferedUtf16CharacterStream::PushBack(), v8::internal::ExternalTwoByteStringUtf16CharacterStream::PushBack(), v8::internal::BufferedUtf16CharacterStream::ReadBlock(), SeekForward(), and v8::internal::BufferedUtf16CharacterStream::SlowPushBack().

buffer_end_

const uint16_t* v8::internal::Utf16CharacterStream::buffer_end_

protected

Definition at line 103 of file scanner.h.

Referenced by Advance(), v8::internal::BufferedUtf16CharacterStream::BufferedUtf16CharacterStream(), v8::internal::BufferedUtf16CharacterStream::ReadBlock(), SeekForward(), and v8::internal::BufferedUtf16CharacterStream::SlowPushBack().

kEndOfInput

const uc32 v8::internal::Utf16CharacterStream::kEndOfInput = -1

staticprotected

Definition at line 93 of file scanner.h.

Referenced by Advance(), and v8::internal::BufferedUtf16CharacterStream::PushBack().

pos_

unsigned v8::internal::Utf16CharacterStream::pos_

protected

Definition at line 104 of file scanner.h.

Referenced by Advance(), v8::internal::GenericStringUtf16CharacterStream::BufferSeekForward(), v8::internal::Utf8ToUtf16CharacterStream::BufferSeekForward(), v8::internal::GenericStringUtf16CharacterStream::GenericStringUtf16CharacterStream(), pos(), v8::internal::BufferedUtf16CharacterStream::PushBack(), v8::internal::ExternalTwoByteStringUtf16CharacterStream::PushBack(), v8::internal::BufferedUtf16CharacterStream::ReadBlock(), SeekForward(), and v8::internal::BufferedUtf16CharacterStream::SlowPushBack().

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

• /mnt/V8SourceCode/src/scanner.h