1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
// 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_HEAP_FACTORY_INL_H_
#define V8_HEAP_FACTORY_INL_H_
#include "src/heap/factory.h"
// Clients of this interface shouldn't depend on lots of heap internals.
// Do not include anything from src/heap here!
#include "src/handles-inl.h"
#include "src/isolate-inl.h"
#include "src/objects-inl.h"
#include "src/objects/feedback-cell.h"
#include "src/objects/heap-number-inl.h"
#include "src/objects/oddball.h"
#include "src/objects/string-inl.h"
#include "src/string-hasher.h"
namespace v8 {
namespace internal {
#define ROOT_ACCESSOR(Type, name, CamelName) \
Handle<Type> Factory::name() { \
return Handle<Type>(&isolate()->roots_table()[RootIndex::k##CamelName]); \
}
ROOT_LIST(ROOT_ACCESSOR)
#undef ROOT_ACCESSOR
Handle<String> Factory::InternalizeString(Handle<String> string) {
if (string->IsInternalizedString()) return string;
return StringTable::LookupString(isolate(), string);
}
Handle<Name> Factory::InternalizeName(Handle<Name> name) {
if (name->IsUniqueName()) return name;
return StringTable::LookupString(isolate(), Handle<String>::cast(name));
}
Handle<String> Factory::NewSubString(Handle<String> str, int begin, int end) {
if (begin == 0 && end == str->length()) return str;
return NewProperSubString(str, begin, end);
}
Handle<Object> Factory::NewNumberFromSize(size_t value,
PretenureFlag pretenure) {
// We can't use Smi::IsValid() here because that operates on a signed
// intptr_t, and casting from size_t could create a bogus sign bit.
if (value <= static_cast<size_t>(Smi::kMaxValue)) {
return Handle<Object>(Smi::FromIntptr(static_cast<intptr_t>(value)),
isolate());
}
return NewNumber(static_cast<double>(value), pretenure);
}
Handle<Object> Factory::NewNumberFromInt64(int64_t value,
PretenureFlag pretenure) {
if (value <= std::numeric_limits<int32_t>::max() &&
value >= std::numeric_limits<int32_t>::min() &&
Smi::IsValid(static_cast<int32_t>(value))) {
return Handle<Object>(Smi::FromInt(static_cast<int32_t>(value)), isolate());
}
return NewNumber(static_cast<double>(value), pretenure);
}
Handle<HeapNumber> Factory::NewHeapNumber(double value,
PretenureFlag pretenure) {
Handle<HeapNumber> heap_number = NewHeapNumber(pretenure);
heap_number->set_value(value);
return heap_number;
}
Handle<MutableHeapNumber> Factory::NewMutableHeapNumber(
double value, PretenureFlag pretenure) {
Handle<MutableHeapNumber> number = NewMutableHeapNumber(pretenure);
number->set_value(value);
return number;
}
Handle<HeapNumber> Factory::NewHeapNumberFromBits(uint64_t bits,
PretenureFlag pretenure) {
Handle<HeapNumber> heap_number = NewHeapNumber(pretenure);
heap_number->set_value_as_bits(bits);
return heap_number;
}
Handle<MutableHeapNumber> Factory::NewMutableHeapNumberFromBits(
uint64_t bits, PretenureFlag pretenure) {
Handle<MutableHeapNumber> number = NewMutableHeapNumber(pretenure);
number->set_value_as_bits(bits);
return number;
}
Handle<MutableHeapNumber> Factory::NewMutableHeapNumberWithHoleNaN(
PretenureFlag pretenure) {
return NewMutableHeapNumberFromBits(kHoleNanInt64, pretenure);
}
Handle<JSArray> Factory::NewJSArrayWithElements(Handle<FixedArrayBase> elements,
ElementsKind elements_kind,
PretenureFlag pretenure) {
return NewJSArrayWithElements(elements, elements_kind, elements->length(),
pretenure);
}
Handle<Object> Factory::NewURIError() {
return NewError(isolate()->uri_error_function(),
MessageTemplate::kURIMalformed);
}
Handle<String> Factory::Uint32ToString(uint32_t value, bool check_cache) {
Handle<String> result;
int32_t int32v = static_cast<int32_t>(value);
if (int32v >= 0 && Smi::IsValid(int32v)) {
result = NumberToString(Smi::FromInt(int32v), check_cache);
} else {
result = NumberToString(NewNumberFromUint(value), check_cache);
}
if (result->length() <= String::kMaxArrayIndexSize &&
result->hash_field() == String::kEmptyHashField) {
uint32_t field = StringHasher::MakeArrayIndexHash(value, result->length());
result->set_hash_field(field);
}
return result;
}
} // namespace internal
} // namespace v8
#endif // V8_HEAP_FACTORY_INL_H_
|
