1/*
2 * Copyright (C) 2006-2018 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21#pragma once
22
23namespace JSC {
24
25enum JSType : uint8_t {
26 // The CellType value must come before any JSType that is a JSCell.
27 CellType,
28 StringType,
29 SymbolType,
30 BigIntType,
31
32 CustomGetterSetterType,
33 APIValueWrapperType,
34
35 NativeExecutableType,
36
37 ProgramExecutableType,
38 ModuleProgramExecutableType,
39 EvalExecutableType,
40 FunctionExecutableType,
41
42 UnlinkedFunctionExecutableType,
43
44 UnlinkedProgramCodeBlockType,
45 UnlinkedModuleProgramCodeBlockType,
46 UnlinkedEvalCodeBlockType,
47 UnlinkedFunctionCodeBlockType,
48
49 CodeBlockType,
50
51 JSFixedArrayType,
52 JSImmutableButterflyType,
53 JSSourceCodeType,
54 JSScriptFetcherType,
55 JSScriptFetchParametersType,
56
57 // The ObjectType value must come before any JSType that is a subclass of JSObject.
58 ObjectType,
59 FinalObjectType,
60 JSCalleeType,
61 JSFunctionType,
62 InternalFunctionType,
63 NumberObjectType,
64 ErrorInstanceType,
65 PureForwardingProxyType,
66 ImpureProxyType,
67 DirectArgumentsType,
68 ScopedArgumentsType,
69 ClonedArgumentsType,
70
71 // Start JSArray types.
72 ArrayType,
73 DerivedArrayType,
74 // End JSArray types.
75
76 ArrayBufferType,
77
78 // Start JSArrayBufferView types. Keep in sync with the order of FOR_EACH_TYPED_ARRAY_TYPE_EXCLUDING_DATA_VIEW.
79 Int8ArrayType,
80 Uint8ArrayType,
81 Uint8ClampedArrayType,
82 Int16ArrayType,
83 Uint16ArrayType,
84 Int32ArrayType,
85 Uint32ArrayType,
86 Float32ArrayType,
87 Float64ArrayType,
88 DataViewType,
89 // End JSArrayBufferView types.
90
91 GetterSetterType,
92
93 // JSScope <- JSWithScope
94 // <- StrictEvalActivation
95 // <- JSSymbolTableObject <- JSLexicalEnvironment <- JSModuleEnvironment
96 // <- JSSegmentedVariableObject <- JSGlobalLexicalEnvironment
97 // <- JSGlobalObject
98 // Start JSScope types.
99 // Start environment record types.
100 GlobalObjectType,
101 GlobalLexicalEnvironmentType,
102 LexicalEnvironmentType,
103 ModuleEnvironmentType,
104 StrictEvalActivationType,
105 // End environment record types.
106 WithScopeType,
107 // End JSScope types.
108
109 RegExpObjectType,
110 ProxyObjectType,
111 JSMapType,
112 JSSetType,
113 JSWeakMapType,
114 JSWeakSetType,
115 WebAssemblyToJSCalleeType,
116 StringObjectType,
117
118 LastJSCObjectType = StringObjectType, // This is the last "JSC" Object type. After this, we have embedder's (e.g., WebCore) extended object types.
119 MaxJSType = 0b11111111,
120};
121
122static constexpr uint32_t FirstTypedArrayType = Int8ArrayType;
123static constexpr uint32_t LastTypedArrayType = DataViewType;
124
125// LastObjectType should be MaxJSType (not LastJSCObjectType) since embedders can add their extended object types after the enums listed in JSType.
126static constexpr uint32_t FirstObjectType = ObjectType;
127static constexpr uint32_t LastObjectType = MaxJSType;
128
129static constexpr uint32_t NumberOfTypedArrayTypes = LastTypedArrayType - FirstTypedArrayType + 1;
130static constexpr uint32_t NumberOfTypedArrayTypesExcludingDataView = NumberOfTypedArrayTypes - 1;
131
132static_assert(sizeof(JSType) == sizeof(uint8_t), "sizeof(JSType) is one byte.");
133static_assert(LastJSCObjectType < 128, "The highest bit is reserved for embedder's extension.");
134
135inline constexpr bool isTypedArrayType(JSType type)
136{
137 return (static_cast<uint32_t>(type) - FirstTypedArrayType) < NumberOfTypedArrayTypesExcludingDataView;
138}
139
140} // namespace JSC
141
142namespace WTF {
143
144class PrintStream;
145
146void printInternal(PrintStream&, JSC::JSType);
147
148} // namespace WTF
149