1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSDataView.h"
#include "ArrayBufferView.h"
#include "DataView.h"
#include "Error.h"
#include "JSCInlines.h"
namespace JSC {
const ClassInfo JSDataView::s_info = {
"DataView", &Base::s_info, 0, CREATE_METHOD_TABLE(JSDataView)};
JSDataView::JSDataView(VM& vm, ConstructionContext& context, ArrayBuffer* buffer)
: Base(vm, context)
, m_buffer(buffer)
{
}
JSDataView* JSDataView::create(
ExecState* exec, Structure* structure, PassRefPtr<ArrayBuffer> passedBuffer,
unsigned byteOffset, unsigned byteLength)
{
RefPtr<ArrayBuffer> buffer = passedBuffer;
if (!ArrayBufferView::verifySubRangeLength(buffer, byteOffset, byteLength, sizeof(uint8_t))) {
throwVMError(exec, createRangeError(exec, ASCIILiteral("Length out of range of buffer")));
return nullptr;
}
if (!ArrayBufferView::verifyByteOffsetAlignment(byteOffset, sizeof(uint8_t))) {
exec->vm().throwException(exec, createRangeError(exec, ASCIILiteral("Byte offset is not aligned")));
return nullptr;
}
VM& vm = exec->vm();
ConstructionContext context(
structure, buffer, byteOffset, byteLength, ConstructionContext::DataView);
ASSERT(context);
JSDataView* result =
new (NotNull, allocateCell<JSDataView>(vm.heap)) JSDataView(vm, context, buffer.get());
result->finishCreation(vm);
return result;
}
JSDataView* JSDataView::createUninitialized(ExecState*, Structure*, unsigned)
{
UNREACHABLE_FOR_PLATFORM();
return 0;
}
JSDataView* JSDataView::create(ExecState*, Structure*, unsigned)
{
UNREACHABLE_FOR_PLATFORM();
return 0;
}
bool JSDataView::set(ExecState*, JSObject*, unsigned, unsigned)
{
UNREACHABLE_FOR_PLATFORM();
return false;
}
PassRefPtr<DataView> JSDataView::typedImpl()
{
return DataView::create(buffer(), byteOffset(), length());
}
bool JSDataView::getOwnPropertySlot(
JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
{
JSDataView* thisObject = jsCast<JSDataView*>(object);
if (propertyName == exec->propertyNames().byteLength) {
slot.setValue(thisObject, DontEnum | ReadOnly, jsNumber(thisObject->m_length));
return true;
}
return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
ArrayBuffer* JSDataView::slowDownAndWasteMemory(JSArrayBufferView*)
{
UNREACHABLE_FOR_PLATFORM();
return 0;
}
PassRefPtr<ArrayBufferView> JSDataView::getTypedArrayImpl(JSArrayBufferView* object)
{
JSDataView* thisObject = jsCast<JSDataView*>(object);
return thisObject->typedImpl();
}
Structure* JSDataView::createStructure(
VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(
vm, globalObject, prototype, TypeInfo(DataViewType, StructureFlags), info(),
NonArray);
}
} // namespace JSC
|
