We should support CreateThis in the FTL
[WebKit-https.git] / Source / JavaScriptCore / runtime / GenericTypedArrayViewInlines.h
1 /*
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24  */
25
26 #pragma once
27
28 #include "GenericTypedArrayView.h"
29 #include "JSGlobalObject.h"
30
31 namespace JSC {
32
33 template<typename Adaptor>
34 GenericTypedArrayView<Adaptor>::GenericTypedArrayView(
35     RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned length)
36     : ArrayBufferView(WTFMove(buffer), byteOffset)
37     , m_length(length)
38 {
39 }
40
41 template<typename Adaptor>
42 RefPtr<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::create(unsigned length)
43 {
44     auto buffer = ArrayBuffer::tryCreate(length, sizeof(typename Adaptor::Type));
45     if (!buffer)
46         return nullptr;
47     return create(WTFMove(buffer), 0, length);
48 }
49
50 template<typename Adaptor>
51 RefPtr<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::create(
52     const typename Adaptor::Type* array, unsigned length)
53 {
54     RefPtr<GenericTypedArrayView> result = create(length);
55     memcpy(result->data(), array, length * sizeof(typename Adaptor::Type));
56     return result;
57 }
58
59 template<typename Adaptor>
60 RefPtr<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::create(
61     RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned length)
62 {
63     ASSERT(buffer);
64     if (!ArrayBufferView::verifySubRangeLength(*buffer, byteOffset, length, sizeof(typename Adaptor::Type))
65         || !verifyByteOffsetAlignment(byteOffset, sizeof(typename Adaptor::Type))) {
66         return nullptr;
67     }
68     
69     return adoptRef(new GenericTypedArrayView(WTFMove(buffer), byteOffset, length));
70 }
71
72 template<typename Adaptor>
73 RefPtr<GenericTypedArrayView<Adaptor>>
74 GenericTypedArrayView<Adaptor>::createUninitialized(unsigned length)
75 {
76     RefPtr<ArrayBuffer> buffer =
77         ArrayBuffer::tryCreateUninitialized(length, sizeof(typename Adaptor::Type));
78     if (!buffer)
79         return nullptr;
80     return create(WTFMove(buffer), 0, length);
81 }
82
83 template<typename Adaptor>
84 RefPtr<GenericTypedArrayView<Adaptor>>
85 GenericTypedArrayView<Adaptor>::subarray(int start) const
86 {
87     return subarray(start, length());
88 }
89
90 template<typename Adaptor>
91 RefPtr<GenericTypedArrayView<Adaptor>>
92 GenericTypedArrayView<Adaptor>::subarray(int start, int end) const
93 {
94     unsigned offset, length;
95     calculateOffsetAndLength(start, end, this->length(), &offset, &length);
96     ArrayBuffer* buffer = possiblySharedBuffer();
97     ASSERT(buffer);
98     clampOffsetAndNumElements<Adaptor::Type>(*buffer, byteOffset(), &offset, &length);
99     return create(buffer, offset, length);
100 }
101
102 template<typename Adaptor>
103 JSArrayBufferView* GenericTypedArrayView<Adaptor>::wrap(
104     ExecState* exec, JSGlobalObject* globalObject)
105 {
106     return Adaptor::JSViewType::create(
107         exec->vm(), globalObject->typedArrayStructure(Adaptor::typeValue), this);
108 }
109
110 } // namespace JSC