2 * Copyright (C) 2013 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
27 #include "JSDataView.h"
29 #include "ArrayBufferView.h"
32 #include "JSCInlines.h"
36 const ClassInfo
JSDataView::s_info
= {
37 "DataView", &Base::s_info
, 0, CREATE_METHOD_TABLE(JSDataView
)};
39 JSDataView::JSDataView(VM
& vm
, ConstructionContext
& context
, ArrayBuffer
* buffer
)
45 JSDataView
* JSDataView::create(
46 ExecState
* exec
, Structure
* structure
, PassRefPtr
<ArrayBuffer
> passedBuffer
,
47 unsigned byteOffset
, unsigned byteLength
)
49 RefPtr
<ArrayBuffer
> buffer
= passedBuffer
;
50 if (!ArrayBufferView::verifySubRangeLength(buffer
, byteOffset
, byteLength
, sizeof(uint8_t))) {
51 throwVMError(exec
, createRangeError(exec
, ASCIILiteral("Length out of range of buffer")));
54 if (!ArrayBufferView::verifyByteOffsetAlignment(byteOffset
, sizeof(uint8_t))) {
55 exec
->vm().throwException(exec
, createRangeError(exec
, ASCIILiteral("Byte offset is not aligned")));
59 ConstructionContext
context(
60 structure
, buffer
, byteOffset
, byteLength
, ConstructionContext::DataView
);
63 new (NotNull
, allocateCell
<JSDataView
>(vm
.heap
)) JSDataView(vm
, context
, buffer
.get());
64 result
->finishCreation(vm
);
68 JSDataView
* JSDataView::createUninitialized(ExecState
*, Structure
*, unsigned)
70 UNREACHABLE_FOR_PLATFORM();
74 JSDataView
* JSDataView::create(ExecState
*, Structure
*, unsigned)
76 UNREACHABLE_FOR_PLATFORM();
80 bool JSDataView::set(ExecState
*, JSObject
*, unsigned, unsigned)
82 UNREACHABLE_FOR_PLATFORM();
86 PassRefPtr
<DataView
> JSDataView::typedImpl()
88 return DataView::create(buffer(), byteOffset(), length());
91 bool JSDataView::getOwnPropertySlot(
92 JSObject
* object
, ExecState
* exec
, PropertyName propertyName
, PropertySlot
& slot
)
94 JSDataView
* thisObject
= jsCast
<JSDataView
*>(object
);
95 if (propertyName
== exec
->propertyNames().byteLength
) {
96 slot
.setValue(thisObject
, DontEnum
| ReadOnly
, jsNumber(thisObject
->m_length
));
100 return Base::getOwnPropertySlot(thisObject
, exec
, propertyName
, slot
);
103 ArrayBuffer
* JSDataView::slowDownAndWasteMemory(JSArrayBufferView
*)
105 UNREACHABLE_FOR_PLATFORM();
109 PassRefPtr
<ArrayBufferView
> JSDataView::getTypedArrayImpl(JSArrayBufferView
* object
)
111 JSDataView
* thisObject
= jsCast
<JSDataView
*>(object
);
112 return thisObject
->typedImpl();
115 Structure
* JSDataView::createStructure(
116 VM
& vm
, JSGlobalObject
* globalObject
, JSValue prototype
)
118 return Structure::create(
119 vm
, globalObject
, prototype
, TypeInfo(DataViewType
, StructureFlags
), info(),