1// Copyright 2016 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "src/field-type.h"
6
7#include "src/handles-inl.h"
8#include "src/objects-inl.h"
9#include "src/objects/smi.h"
10#include "src/ostreams.h"
11
12namespace v8 {
13namespace internal {
14
15// static
16FieldType FieldType::None() { return FieldType(Smi::FromInt(2).ptr()); }
17
18// static
19FieldType FieldType::Any() { return FieldType(Smi::FromInt(1).ptr()); }
20
21// static
22Handle<FieldType> FieldType::None(Isolate* isolate) {
23 return handle(None(), isolate);
24}
25
26// static
27Handle<FieldType> FieldType::Any(Isolate* isolate) {
28 return handle(Any(), isolate);
29}
30
31// static
32FieldType FieldType::Class(Map map) { return FieldType::cast(map); }
33
34// static
35Handle<FieldType> FieldType::Class(Handle<Map> map, Isolate* isolate) {
36 return handle(Class(*map), isolate);
37}
38
39// static
40FieldType FieldType::cast(Object object) {
41 DCHECK(object == None() || object == Any() || object->IsMap());
42 return FieldType(object->ptr());
43}
44
45bool FieldType::IsClass() const { return this->IsMap(); }
46
47Map FieldType::AsClass() const {
48 DCHECK(IsClass());
49 return Map::cast(*this);
50}
51
52bool FieldType::NowStable() const {
53 return !this->IsClass() || AsClass()->is_stable();
54}
55
56bool FieldType::NowIs(FieldType other) const {
57 if (other->IsAny()) return true;
58 if (IsNone()) return true;
59 if (other->IsNone()) return false;
60 if (IsAny()) return false;
61 DCHECK(IsClass());
62 DCHECK(other->IsClass());
63 return *this == other;
64}
65
66bool FieldType::NowIs(Handle<FieldType> other) const { return NowIs(*other); }
67
68void FieldType::PrintTo(std::ostream& os) const {
69 if (IsAny()) {
70 os << "Any";
71 } else if (IsNone()) {
72 os << "None";
73 } else {
74 DCHECK(IsClass());
75 os << "Class(" << reinterpret_cast<void*>(AsClass()->ptr()) << ")";
76 }
77}
78
79bool FieldType::NowContains(Object value) const {
80 if (*this == Any()) return true;
81 if (*this == None()) return false;
82 if (!value->IsHeapObject()) return false;
83 return HeapObject::cast(value)->map() == Map::cast(*this);
84}
85
86} // namespace internal
87} // namespace v8
88