v8::Utf8LengthHelper::Visitor Class Reference

Collaboration diagram for v8::Utf8LengthHelper::Visitor:

Public Member Functions
	Visitor ()
void	VisitOneByteString (const uint8_t *chars, int length)
void	VisitTwoByteString (const uint16_t *chars, int length)

Static Public Member Functions
static i::ConsString *	VisitFlat (i::String *string, int *length, uint8_t *state)

Private Member Functions
	DISALLOW_COPY_AND_ASSIGN (Visitor)

Private Attributes
int	utf8_length_
uint8_t	state_

Detailed Description

Definition at line 4389 of file api.cc.

Constructor & Destructor Documentation

Visitor()

v8::Utf8LengthHelper::Visitor::Visitor ( )

inline

Definition at line 4391 of file api.cc.

: utf8_length_(0), state_(kInitialState) {}

Member Function Documentation

DISALLOW_COPY_AND_ASSIGN()

v8::Utf8LengthHelper::Visitor::DISALLOW_COPY_AND_ASSIGN ( Visitor  )

private

VisitFlat()

static i::ConsString* v8::Utf8LengthHelper::Visitor::VisitFlat ( i::String *  string, int *  length, uint8_t *  state  )

inlinestatic

Definition at line 4423 of file api.cc.

                                                    {
      Visitor visitor;
      i::ConsString* cons_string = i::String::VisitFlat(&visitor, string);
      *length = visitor.utf8_length_;
      *state = visitor.state_;
      return cons_string;
    }

References state_, utf8_length_, and v8::internal::String::VisitFlat().

Referenced by v8::Utf8LengthHelper::Calculate(), and v8::Utf8Length().

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VisitOneByteString()

void v8::Utf8LengthHelper::Visitor::VisitOneByteString ( const uint8_t *  chars, int  length  )

inline

Definition at line 4393 of file api.cc.

                                                              {
      int utf8_length = 0;
      // Add in length 1 for each non-Latin1 character.
      for (int i = 0; i < length; i++) {
        utf8_length += *chars++ >> 7;
      }
      // Add in length 1 for each character.
      utf8_length_ = utf8_length + length;
      state_ = kInitialState;
    }

References v8::Utf8LengthHelper::kInitialState, state_, and utf8_length_.

VisitTwoByteString()

void v8::Utf8LengthHelper::Visitor::VisitTwoByteString ( const uint16_t *  chars, int  length  )

inline

Definition at line 4404 of file api.cc.

                                                               {
      int utf8_length = 0;
      int last_character = unibrow::Utf16::kNoPreviousCharacter;
      for (int i = 0; i < length; i++) {
        uint16_t c = chars[i];
        utf8_length += unibrow::Utf8::Length(c, last_character);
        last_character = c;
      }
      utf8_length_ = utf8_length;
      uint8_t state = 0;
      if (unibrow::Utf16::IsTrailSurrogate(chars[0])) {
        state |= kStartsWithTrailingSurrogate;
      }
      if (unibrow::Utf16::IsLeadSurrogate(chars[length-1])) {
        state |= kEndsWithLeadingSurrogate;
      }
      state_ = state;
    }

References unibrow::Utf16::IsLeadSurrogate(), unibrow::Utf16::IsTrailSurrogate(), v8::Utf8LengthHelper::kEndsWithLeadingSurrogate, unibrow::Utf16::kNoPreviousCharacter, v8::Utf8LengthHelper::kStartsWithTrailingSurrogate, unibrow::Utf8::Length(), state_, and utf8_length_.

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Member Data Documentation

state_

uint8_t v8::Utf8LengthHelper::Visitor::state_

private

Definition at line 4435 of file api.cc.

Referenced by VisitFlat(), VisitOneByteString(), and VisitTwoByteString().

utf8_length_

int v8::Utf8LengthHelper::Visitor::utf8_length_

private

Definition at line 4434 of file api.cc.

Referenced by VisitFlat(), VisitOneByteString(), and VisitTwoByteString().

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

• /mnt/V8SourceCode/src/api.cc