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 | #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, length * sizeof(typename Adaptor::Type)) |
37 | { |
38 | } |
39 | |
40 | template<typename Adaptor> |
41 | Ref<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::create(unsigned length) |
42 | { |
43 | auto result = tryCreate(length); |
44 | RELEASE_ASSERT(result); |
45 | return result.releaseNonNull(); |
46 | } |
47 | |
48 | template<typename Adaptor> |
49 | Ref<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::create( |
50 | const typename Adaptor::Type* array, unsigned length) |
51 | { |
52 | auto result = tryCreate(array, length); |
53 | RELEASE_ASSERT(result); |
54 | return result.releaseNonNull(); |
55 | } |
56 | |
57 | template<typename Adaptor> |
58 | Ref<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::create( |
59 | RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned length) |
60 | { |
61 | auto result = tryCreate(WTFMove(buffer), byteOffset, length); |
62 | RELEASE_ASSERT(result); |
63 | return result.releaseNonNull(); |
64 | } |
65 | |
66 | template<typename Adaptor> |
67 | RefPtr<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::tryCreate(unsigned length) |
68 | { |
69 | auto buffer = ArrayBuffer::tryCreate(length, sizeof(typename Adaptor::Type)); |
70 | if (!buffer) |
71 | return nullptr; |
72 | return tryCreate(WTFMove(buffer), 0, length); |
73 | } |
74 | |
75 | template<typename Adaptor> |
76 | RefPtr<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::tryCreate( |
77 | const typename Adaptor::Type* array, unsigned length) |
78 | { |
79 | RefPtr<GenericTypedArrayView> result = tryCreate(length); |
80 | if (!result) |
81 | return nullptr; |
82 | memcpy(result->data(), array, length * sizeof(typename Adaptor::Type)); |
83 | return result; |
84 | } |
85 | |
86 | template<typename Adaptor> |
87 | RefPtr<GenericTypedArrayView<Adaptor>> GenericTypedArrayView<Adaptor>::tryCreate( |
88 | RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned length) |
89 | { |
90 | ASSERT(buffer); |
91 | if (!ArrayBufferView::verifySubRangeLength(*buffer, byteOffset, length, sizeof(typename Adaptor::Type)) |
92 | || !verifyByteOffsetAlignment(byteOffset, sizeof(typename Adaptor::Type))) { |
93 | return nullptr; |
94 | } |
95 | |
96 | return adoptRef(new GenericTypedArrayView(WTFMove(buffer), byteOffset, length)); |
97 | } |
98 | |
99 | template<typename Adaptor> |
100 | Ref<GenericTypedArrayView<Adaptor>> |
101 | GenericTypedArrayView<Adaptor>::createUninitialized(unsigned length) |
102 | { |
103 | auto result = tryCreateUninitialized(length); |
104 | RELEASE_ASSERT(result); |
105 | return result.releaseNonNull(); |
106 | } |
107 | |
108 | template<typename Adaptor> |
109 | RefPtr<GenericTypedArrayView<Adaptor>> |
110 | GenericTypedArrayView<Adaptor>::tryCreateUninitialized(unsigned length) |
111 | { |
112 | RefPtr<ArrayBuffer> buffer = |
113 | ArrayBuffer::tryCreateUninitialized(length, sizeof(typename Adaptor::Type)); |
114 | if (!buffer) |
115 | return nullptr; |
116 | return tryCreate(WTFMove(buffer), 0, length); |
117 | } |
118 | |
119 | template<typename Adaptor> |
120 | RefPtr<GenericTypedArrayView<Adaptor>> |
121 | GenericTypedArrayView<Adaptor>::subarray(int start) const |
122 | { |
123 | return subarray(start, length()); |
124 | } |
125 | |
126 | template<typename Adaptor> |
127 | RefPtr<GenericTypedArrayView<Adaptor>> |
128 | GenericTypedArrayView<Adaptor>::subarray(int start, int end) const |
129 | { |
130 | unsigned offset, length; |
131 | calculateOffsetAndLength(start, end, this->length(), &offset, &length); |
132 | ArrayBuffer* buffer = possiblySharedBuffer(); |
133 | ASSERT(buffer); |
134 | clampOffsetAndNumElements<Adaptor::Type>(*buffer, byteOffset(), &offset, &length); |
135 | return tryCreate(buffer, offset, length); |
136 | } |
137 | |
138 | template<typename Adaptor> |
139 | JSArrayBufferView* GenericTypedArrayView<Adaptor>::wrap( |
140 | ExecState* exec, JSGlobalObject* globalObject) |
141 | { |
142 | return Adaptor::JSViewType::create( |
143 | exec->vm(), globalObject->typedArrayStructure(Adaptor::typeValue), this); |
144 | } |
145 | |
146 | } // namespace JSC |
147 | |