v8::internal::SeqOneByteSubStringKey Class Reference

#include <objects-inl.h>

Inheritance diagram for v8::internal::SeqOneByteSubStringKey:

Collaboration diagram for v8::internal::SeqOneByteSubStringKey:

Public Member Functions
	SeqOneByteSubStringKey (Handle< SeqOneByteString > string, int from, int length)
virtual uint32_t	Hash () OVERRIDE
virtual uint32_t	HashForObject (Object *other) OVERRIDE
virtual bool	IsMatch (Object *string) OVERRIDE
virtual Handle< Object >	AsHandle (Isolate *isolate) OVERRIDE
Public Member Functions inherited from v8::internal::HashTableKey
virtual	~HashTableKey ()

Private Attributes
Handle< SeqOneByteString >	string_
int	from_
int	length_
uint32_t	hash_field_

Detailed Description

Definition at line 538 of file objects-inl.h.

Constructor & Destructor Documentation

SeqOneByteSubStringKey()

v8::internal::SeqOneByteSubStringKey::SeqOneByteSubStringKey ( Handle< SeqOneByteString >  string, int  from, int  length  )

inline

Definition at line 540 of file objects-inl.h.

      : string_(string), from_(from), length_(length) {
    DCHECK(string_->IsSeqOneByteString());
  }

References DCHECK, and string_.

Member Function Documentation

AsHandle()

Handle< Object > v8::internal::SeqOneByteSubStringKey::AsHandle ( Isolate *  isolate )

virtual

Implements v8::internal::HashTableKey.

Definition at line 13689 of file objects.cc.

                                                                {
  if (hash_field_ == 0) Hash();
  return isolate->factory()->NewOneByteInternalizedSubString(
      string_, from_, length_, hash_field_);
}

References v8::internal::Isolate::factory(), and v8::internal::Hash().

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Hash()

virtual uint32_t v8::internal::SeqOneByteSubStringKey::Hash ( )

inlinevirtual

Implements v8::internal::HashTableKey.

Definition at line 545 of file objects-inl.h.

                                   {
    DCHECK(length_ >= 0);
    DCHECK(from_ + length_ <= string_->length());
    const uint8_t* chars = string_->GetChars() + from_;
    hash_field_ = StringHasher::HashSequentialString(
        chars, length_, string_->GetHeap()->HashSeed());
    uint32_t result = hash_field_ >> String::kHashShift;
    DCHECK(result != 0);  // Ensure that the hash value of 0 is never computed.
    return result;
  }

References DCHECK, from_, hash_field_, v8::internal::StringHasher::HashSequentialString(), v8::internal::Name::kHashShift, length_, and string_.

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HashForObject()

virtual uint32_t v8::internal::SeqOneByteSubStringKey::HashForObject ( Object *  other )

inlinevirtual

Implements v8::internal::HashTableKey.

Definition at line 556 of file objects-inl.h.

                                                         {
    return String::cast(other)->Hash();
  }

IsMatch()

bool v8::internal::SeqOneByteSubStringKey::IsMatch ( Object *  string )

virtual

Implements v8::internal::HashTableKey.

Definition at line 13696 of file objects.cc.

                                                   {
  Vector<const uint8_t> chars(string_->GetChars() + from_, length_);
  return String::cast(string)->IsOneByteEqualTo(chars);
}

Member Data Documentation

from_

int v8::internal::SeqOneByteSubStringKey::from_

private

Definition at line 565 of file objects-inl.h.

Referenced by Hash().

hash_field_

uint32_t v8::internal::SeqOneByteSubStringKey::hash_field_

private

Definition at line 567 of file objects-inl.h.

Referenced by Hash().

length_

int v8::internal::SeqOneByteSubStringKey::length_

private

Definition at line 566 of file objects-inl.h.

Referenced by Hash().

string_

Handle<SeqOneByteString> v8::internal::SeqOneByteSubStringKey::string_

private

Definition at line 564 of file objects-inl.h.

Referenced by Hash(), and SeqOneByteSubStringKey().

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

• /mnt/V8SourceCode/src/objects-inl.h
• /mnt/V8SourceCode/src/objects.cc