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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_OBJECTS_NAME_INL_H_
#define V8_OBJECTS_NAME_INL_H_
#include "src/objects/name.h"
#include "src/heap/heap-inl.h"
#include "src/heap/heap-write-barrier.h"
#include "src/objects/map-inl.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
OBJECT_CONSTRUCTORS_IMPL(Name, HeapObject)
OBJECT_CONSTRUCTORS_IMPL(Symbol, Name)
CAST_ACCESSOR(Name)
CAST_ACCESSOR(Symbol)
ACCESSORS(Symbol, name, Object, kNameOffset)
INT_ACCESSORS(Symbol, flags, kFlagsOffset)
BIT_FIELD_ACCESSORS(Symbol, flags, is_private, Symbol::IsPrivateBit)
BIT_FIELD_ACCESSORS(Symbol, flags, is_well_known_symbol,
Symbol::IsWellKnownSymbolBit)
BIT_FIELD_ACCESSORS(Symbol, flags, is_public, Symbol::IsPublicBit)
BIT_FIELD_ACCESSORS(Symbol, flags, is_interesting_symbol,
Symbol::IsInterestingSymbolBit)
bool Symbol::is_private_name() const {
bool value = Symbol::IsPrivateNameBit::decode(flags());
DCHECK_IMPLIES(value, is_private());
return value;
}
void Symbol::set_is_private_name() {
// TODO(gsathya): Re-order the bits to have these next to each other
// and just do the bit shifts once.
set_flags(Symbol::IsPrivateBit::update(flags(), true));
set_flags(Symbol::IsPrivateNameBit::update(flags(), true));
}
bool Name::IsUniqueName() const {
uint32_t type = map()->instance_type();
return (type & (kIsNotStringMask | kIsNotInternalizedMask)) !=
(kStringTag | kNotInternalizedTag);
}
uint32_t Name::hash_field() {
return READ_UINT32_FIELD(this, kHashFieldOffset);
}
void Name::set_hash_field(uint32_t value) {
WRITE_UINT32_FIELD(this, kHashFieldOffset, value);
}
bool Name::Equals(Name other) {
if (other == *this) return true;
if ((this->IsInternalizedString() && other->IsInternalizedString()) ||
this->IsSymbol() || other->IsSymbol()) {
return false;
}
return String::cast(*this)->SlowEquals(String::cast(other));
}
bool Name::Equals(Isolate* isolate, Handle<Name> one, Handle<Name> two) {
if (one.is_identical_to(two)) return true;
if ((one->IsInternalizedString() && two->IsInternalizedString()) ||
one->IsSymbol() || two->IsSymbol()) {
return false;
}
return String::SlowEquals(isolate, Handle<String>::cast(one),
Handle<String>::cast(two));
}
bool Name::IsHashFieldComputed(uint32_t field) {
return (field & kHashNotComputedMask) == 0;
}
bool Name::HasHashCode() { return IsHashFieldComputed(hash_field()); }
uint32_t Name::Hash() {
// Fast case: has hash code already been computed?
uint32_t field = hash_field();
if (IsHashFieldComputed(field)) return field >> kHashShift;
// Slow case: compute hash code and set it. Has to be a string.
// Also the string must be writable, because read-only strings will have their
// hash values precomputed.
return String::cast(*this)->ComputeAndSetHash(
Heap::FromWritableHeapObject(*this)->isolate());
}
bool Name::IsInterestingSymbol() const {
return IsSymbol() && Symbol::cast(*this)->is_interesting_symbol();
}
bool Name::IsPrivate() {
return this->IsSymbol() && Symbol::cast(*this)->is_private();
}
bool Name::IsPrivateName() {
bool is_private_name =
this->IsSymbol() && Symbol::cast(*this)->is_private_name();
DCHECK_IMPLIES(is_private_name, IsPrivate());
return is_private_name;
}
bool Name::AsArrayIndex(uint32_t* index) {
return IsString() && String::cast(*this)->AsArrayIndex(index);
}
// static
bool Name::ContainsCachedArrayIndex(uint32_t hash) {
return (hash & Name::kDoesNotContainCachedArrayIndexMask) == 0;
}
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_NAME_INL_H_
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