1 | /* |
2 | * Copyright (C) 2013, 2016 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * 1. Redistributions of source code must retain the above copyright |
8 | * notice, this list of conditions and the following disclaimer. |
9 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #include "config.h" |
27 | #include "JSArrayBufferPrototype.h" |
28 | |
29 | #include "Error.h" |
30 | #include "ExceptionHelpers.h" |
31 | #include "JSArrayBuffer.h" |
32 | #include "JSFunction.h" |
33 | #include "JSCInlines.h" |
34 | #include "TypedArrayAdaptors.h" |
35 | |
36 | namespace JSC { |
37 | |
38 | static EncodedJSValue JSC_HOST_CALL arrayBufferProtoFuncSlice(ExecState* exec) |
39 | { |
40 | VM& vm = exec->vm(); |
41 | auto scope = DECLARE_THROW_SCOPE(vm); |
42 | |
43 | JSFunction* callee = jsCast<JSFunction*>(exec->jsCallee()); |
44 | |
45 | JSArrayBuffer* thisObject = jsDynamicCast<JSArrayBuffer*>(vm, exec->thisValue()); |
46 | if (!thisObject || thisObject->impl()->isShared()) |
47 | return throwVMTypeError(exec, scope, "Receiver of slice must be an ArrayBuffer."_s ); |
48 | |
49 | double begin = exec->argument(0).toInteger(exec); |
50 | RETURN_IF_EXCEPTION(scope, encodedJSValue()); |
51 | |
52 | double end; |
53 | if (!exec->argument(1).isUndefined()) { |
54 | end = exec->uncheckedArgument(1).toInteger(exec); |
55 | RETURN_IF_EXCEPTION(scope, encodedJSValue()); |
56 | } else |
57 | end = thisObject->impl()->byteLength(); |
58 | |
59 | auto newBuffer = thisObject->impl()->slice(begin, end); |
60 | |
61 | Structure* structure = callee->globalObject(vm)->arrayBufferStructure(newBuffer->sharingMode()); |
62 | |
63 | JSArrayBuffer* result = JSArrayBuffer::create(vm, structure, WTFMove(newBuffer)); |
64 | |
65 | return JSValue::encode(result); |
66 | } |
67 | |
68 | // http://tc39.github.io/ecmascript_sharedmem/shmem.html#sec-get-arraybuffer.prototype.bytelength |
69 | static EncodedJSValue JSC_HOST_CALL arrayBufferProtoGetterFuncByteLength(ExecState* exec) |
70 | { |
71 | VM& vm = exec->vm(); |
72 | auto scope = DECLARE_THROW_SCOPE(vm); |
73 | JSValue thisValue = exec->thisValue(); |
74 | if (!thisValue.isObject()) |
75 | return throwVMTypeError(exec, scope, "Receiver should be an array buffer but was not an object"_s ); |
76 | |
77 | auto* thisObject = jsDynamicCast<JSArrayBuffer*>(vm, thisValue); |
78 | if (!thisObject) |
79 | return throwVMTypeError(exec, scope, "Receiver should be an array buffer"_s ); |
80 | if (thisObject->isShared()) |
81 | return throwVMTypeError(exec, scope, "Receiver should not be a shared array buffer"_s ); |
82 | |
83 | RELEASE_AND_RETURN(scope, JSValue::encode(jsNumber(thisObject->impl()->byteLength()))); |
84 | } |
85 | |
86 | // http://tc39.github.io/ecmascript_sharedmem/shmem.html#StructuredData.SharedArrayBuffer.prototype.get_byteLength |
87 | static EncodedJSValue JSC_HOST_CALL sharedArrayBufferProtoGetterFuncByteLength(ExecState* exec) |
88 | { |
89 | VM& vm = exec->vm(); |
90 | auto scope = DECLARE_THROW_SCOPE(vm); |
91 | JSValue thisValue = exec->thisValue(); |
92 | if (!thisValue.isObject()) |
93 | return throwVMTypeError(exec, scope, "Receiver should be an array buffer but was not an object"_s ); |
94 | |
95 | auto* thisObject = jsDynamicCast<JSArrayBuffer*>(vm, thisValue); |
96 | if (!thisObject) |
97 | return throwVMTypeError(exec, scope, "Receiver should be an array buffer"_s ); |
98 | if (!thisObject->isShared()) |
99 | return throwVMTypeError(exec, scope, "Receiver should be a shared array buffer"_s ); |
100 | |
101 | RELEASE_AND_RETURN(scope, JSValue::encode(jsNumber(thisObject->impl()->byteLength()))); |
102 | } |
103 | |
104 | const ClassInfo JSArrayBufferPrototype::s_info = { |
105 | "ArrayBufferPrototype" , &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSArrayBufferPrototype) |
106 | }; |
107 | |
108 | JSArrayBufferPrototype::JSArrayBufferPrototype(VM& vm, Structure* structure, ArrayBufferSharingMode sharingMode) |
109 | : Base(vm, structure) |
110 | , m_sharingMode(sharingMode) |
111 | { |
112 | } |
113 | |
114 | void JSArrayBufferPrototype::finishCreation(VM& vm, JSGlobalObject* globalObject) |
115 | { |
116 | Base::finishCreation(vm); |
117 | |
118 | JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->slice, arrayBufferProtoFuncSlice, static_cast<unsigned>(PropertyAttribute::DontEnum), 2); |
119 | putDirectWithoutTransition(vm, vm.propertyNames->toStringTagSymbol, jsString(&vm, arrayBufferSharingModeName(m_sharingMode)), PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly); |
120 | if (m_sharingMode == ArrayBufferSharingMode::Default) |
121 | JSC_NATIVE_GETTER_WITHOUT_TRANSITION(vm.propertyNames->byteLength, arrayBufferProtoGetterFuncByteLength, PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly); |
122 | else |
123 | JSC_NATIVE_GETTER_WITHOUT_TRANSITION(vm.propertyNames->byteLength, sharedArrayBufferProtoGetterFuncByteLength, PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly); |
124 | } |
125 | |
126 | JSArrayBufferPrototype* JSArrayBufferPrototype::create(VM& vm, JSGlobalObject* globalObject, Structure* structure, ArrayBufferSharingMode sharingMode) |
127 | { |
128 | JSArrayBufferPrototype* prototype = |
129 | new (NotNull, allocateCell<JSArrayBufferPrototype>(vm.heap)) |
130 | JSArrayBufferPrototype(vm, structure, sharingMode); |
131 | prototype->finishCreation(vm, globalObject); |
132 | return prototype; |
133 | } |
134 | |
135 | Structure* JSArrayBufferPrototype::createStructure( |
136 | VM& vm, JSGlobalObject* globalObject, JSValue prototype) |
137 | { |
138 | return Structure::create( |
139 | vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info()); |
140 | } |
141 | |
142 | } // namespace JSC |
143 | |
144 | |