Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 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/ostreams.h" |
| 9 | #include "src/types.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
| 14 | // static |
| 15 | FieldType* FieldType::None() { |
| 16 | return reinterpret_cast<FieldType*>(Smi::FromInt(0)); |
| 17 | } |
| 18 | |
| 19 | // static |
| 20 | FieldType* FieldType::Any() { |
| 21 | return reinterpret_cast<FieldType*>(Smi::FromInt(1)); |
| 22 | } |
| 23 | |
| 24 | // static |
| 25 | Handle<FieldType> FieldType::None(Isolate* isolate) { |
| 26 | return handle(None(), isolate); |
| 27 | } |
| 28 | |
| 29 | // static |
| 30 | Handle<FieldType> FieldType::Any(Isolate* isolate) { |
| 31 | return handle(Any(), isolate); |
| 32 | } |
| 33 | |
| 34 | // static |
| 35 | FieldType* FieldType::Class(i::Map* map) { return FieldType::cast(map); } |
| 36 | |
| 37 | // static |
| 38 | Handle<FieldType> FieldType::Class(i::Handle<i::Map> map, Isolate* isolate) { |
| 39 | return handle(Class(*map), isolate); |
| 40 | } |
| 41 | |
| 42 | // static |
| 43 | FieldType* FieldType::cast(Object* object) { |
| 44 | DCHECK(object == None() || object == Any() || object->IsMap()); |
| 45 | return reinterpret_cast<FieldType*>(object); |
| 46 | } |
| 47 | |
| 48 | bool FieldType::IsClass() { return this->IsMap(); } |
| 49 | |
| 50 | Handle<i::Map> FieldType::AsClass() { |
| 51 | DCHECK(IsClass()); |
| 52 | i::Map* map = Map::cast(this); |
| 53 | return handle(map, map->GetIsolate()); |
| 54 | } |
| 55 | |
| 56 | bool FieldType::NowStable() { |
| 57 | return !this->IsClass() || this->AsClass()->is_stable(); |
| 58 | } |
| 59 | |
| 60 | bool FieldType::NowIs(FieldType* other) { |
| 61 | if (other->IsAny()) return true; |
| 62 | if (IsNone()) return true; |
| 63 | if (other->IsNone()) return false; |
| 64 | if (IsAny()) return false; |
| 65 | DCHECK(IsClass()); |
| 66 | DCHECK(other->IsClass()); |
| 67 | return this == other; |
| 68 | } |
| 69 | |
| 70 | bool FieldType::NowIs(Handle<FieldType> other) { return NowIs(*other); } |
| 71 | |
| 72 | Type* FieldType::Convert(Zone* zone) { |
| 73 | if (IsAny()) return Type::Any(); |
| 74 | if (IsNone()) return Type::None(); |
| 75 | DCHECK(IsClass()); |
| 76 | return Type::Class(AsClass(), zone); |
| 77 | } |
| 78 | |
| 79 | void FieldType::PrintTo(std::ostream& os) { |
| 80 | if (IsAny()) { |
| 81 | os << "Any"; |
| 82 | } else if (IsNone()) { |
| 83 | os << "None"; |
| 84 | } else { |
| 85 | DCHECK(IsClass()); |
| 86 | os << "Class(" << static_cast<void*>(*AsClass()) << ")"; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | } // namespace internal |
| 91 | } // namespace v8 |