1 | /* |
2 | * Copyright (C) 2013 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 "ArrayBuffer.h" |
29 | #include "ArrayBufferView.h" |
30 | |
31 | namespace JSC { |
32 | |
33 | template<typename Adaptor> |
34 | class GenericTypedArrayView final : public ArrayBufferView { |
35 | protected: |
36 | GenericTypedArrayView(RefPtr<ArrayBuffer>&&, unsigned byteOffset, unsigned length); |
37 | |
38 | public: |
39 | static Ref<GenericTypedArrayView> create(unsigned length); |
40 | static Ref<GenericTypedArrayView> create(const typename Adaptor::Type* array, unsigned length); |
41 | static Ref<GenericTypedArrayView> create(RefPtr<ArrayBuffer>&&, unsigned byteOffset, unsigned length); |
42 | static RefPtr<GenericTypedArrayView> tryCreate(unsigned length); |
43 | static RefPtr<GenericTypedArrayView> tryCreate(const typename Adaptor::Type* array, unsigned length); |
44 | static RefPtr<GenericTypedArrayView> tryCreate(RefPtr<ArrayBuffer>&&, unsigned byteOffset, unsigned length); |
45 | |
46 | static Ref<GenericTypedArrayView> createUninitialized(unsigned length); |
47 | static RefPtr<GenericTypedArrayView> tryCreateUninitialized(unsigned length); |
48 | |
49 | typename Adaptor::Type* data() const { return static_cast<typename Adaptor::Type*>(baseAddress()); } |
50 | |
51 | bool set(GenericTypedArrayView<Adaptor>* array, unsigned offset) |
52 | { |
53 | return setImpl(array, offset * sizeof(typename Adaptor::Type)); |
54 | } |
55 | |
56 | bool setRange(const typename Adaptor::Type* data, size_t count, unsigned offset) |
57 | { |
58 | return setRangeImpl( |
59 | reinterpret_cast<const char*>(data), |
60 | count * sizeof(typename Adaptor::Type), |
61 | offset * sizeof(typename Adaptor::Type)); |
62 | } |
63 | |
64 | bool zeroRange(unsigned offset, size_t count) |
65 | { |
66 | return zeroRangeImpl(offset * sizeof(typename Adaptor::Type), count * sizeof(typename Adaptor::Type)); |
67 | } |
68 | |
69 | void zeroFill() { zeroRange(0, length()); } |
70 | |
71 | unsigned length() const |
72 | { |
73 | if (isNeutered()) |
74 | return 0; |
75 | return byteLength() / sizeof(typename Adaptor::Type); |
76 | } |
77 | |
78 | typename Adaptor::Type item(unsigned index) const |
79 | { |
80 | ASSERT_WITH_SECURITY_IMPLICATION(index < this->length()); |
81 | return data()[index]; |
82 | } |
83 | |
84 | void set(unsigned index, double value) const |
85 | { |
86 | ASSERT_WITH_SECURITY_IMPLICATION(index < this->length()); |
87 | data()[index] = Adaptor::toNativeFromDouble(value); |
88 | } |
89 | |
90 | void setNative(unsigned index, typename Adaptor::Type value) const |
91 | { |
92 | ASSERT_WITH_SECURITY_IMPLICATION(index < this->length()); |
93 | data()[index] = value; |
94 | } |
95 | |
96 | bool getRange(typename Adaptor::Type* data, size_t count, unsigned offset) |
97 | { |
98 | return getRangeImpl( |
99 | reinterpret_cast<char*>(data), |
100 | count * sizeof(typename Adaptor::Type), |
101 | offset * sizeof(typename Adaptor::Type)); |
102 | } |
103 | |
104 | bool checkInboundData(unsigned offset, size_t count) const |
105 | { |
106 | unsigned length = this->length(); |
107 | return (offset <= length |
108 | && offset + count <= length |
109 | // check overflow |
110 | && offset + count >= offset); |
111 | } |
112 | |
113 | RefPtr<GenericTypedArrayView> subarray(int start) const; |
114 | RefPtr<GenericTypedArrayView> subarray(int start, int end) const; |
115 | |
116 | TypedArrayType getType() const override |
117 | { |
118 | return Adaptor::typeValue; |
119 | } |
120 | |
121 | JSArrayBufferView* wrap(ExecState*, JSGlobalObject*) override; |
122 | }; |
123 | |
124 | } // namespace JSC |
125 | |