1 | /* |
2 | * Copyright (C) 2013-2019 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 "JSCJSValue.h" |
29 | #include "MathCommon.h" |
30 | #include "TypedArrayType.h" |
31 | #include <wtf/MathExtras.h> |
32 | |
33 | namespace JSC { |
34 | |
35 | template< |
36 | typename TypeArg, typename ViewTypeArg, typename JSViewTypeArg, |
37 | TypedArrayType typeValueArg> |
38 | struct IntegralTypedArrayAdaptor { |
39 | typedef TypeArg Type; |
40 | typedef ViewTypeArg ViewType; |
41 | typedef JSViewTypeArg JSViewType; |
42 | static const TypedArrayType typeValue = typeValueArg; |
43 | constexpr static const TypeArg minValue = std::numeric_limits<TypeArg>::lowest(); |
44 | constexpr static const TypeArg maxValue = std::numeric_limits<TypeArg>::max(); |
45 | |
46 | static JSValue toJSValue(Type value) |
47 | { |
48 | static_assert(!std::is_floating_point<Type>::value, "" ); |
49 | return jsNumber(value); |
50 | } |
51 | |
52 | static double toDouble(Type value) |
53 | { |
54 | return static_cast<double>(value); |
55 | } |
56 | |
57 | static Type toNativeFromInt32(int32_t value) |
58 | { |
59 | return static_cast<Type>(value); |
60 | } |
61 | |
62 | static Type toNativeFromUint32(uint32_t value) |
63 | { |
64 | return static_cast<Type>(value); |
65 | } |
66 | |
67 | static Type toNativeFromDouble(double value) |
68 | { |
69 | int32_t result = static_cast<int32_t>(value); |
70 | if (static_cast<double>(result) != value) |
71 | result = toInt32(value); |
72 | return static_cast<Type>(result); |
73 | } |
74 | |
75 | template<typename OtherAdaptor> |
76 | static typename OtherAdaptor::Type convertTo(Type value) |
77 | { |
78 | if (typeValue == TypeUint32) |
79 | return OtherAdaptor::toNativeFromUint32(value); |
80 | return OtherAdaptor::toNativeFromInt32(value); |
81 | } |
82 | |
83 | static Optional<Type> toNativeFromInt32WithoutCoercion(int32_t value) |
84 | { |
85 | if ((value >= 0 && static_cast<uint32_t>(value) > static_cast<uint32_t>(maxValue)) || value < static_cast<int32_t>(minValue)) |
86 | return WTF::nullopt; |
87 | return static_cast<Type>(value); |
88 | } |
89 | |
90 | static Optional<Type> toNativeFromUint32WithoutCoercion(uint32_t value) |
91 | { |
92 | if (value > static_cast<uint32_t>(maxValue)) |
93 | return WTF::nullopt; |
94 | |
95 | return static_cast<Type>(value); |
96 | } |
97 | |
98 | static Optional<Type> toNativeFromDoubleWithoutCoercion(double value) |
99 | { |
100 | Type integer = static_cast<Type>(value); |
101 | if (static_cast<double>(integer) != value) |
102 | return WTF::nullopt; |
103 | |
104 | if (value < 0) |
105 | return toNativeFromInt32WithoutCoercion(static_cast<int32_t>(value)); |
106 | |
107 | return toNativeFromUint32WithoutCoercion(static_cast<uint32_t>(value)); |
108 | } |
109 | }; |
110 | |
111 | template< |
112 | typename TypeArg, typename ViewTypeArg, typename JSViewTypeArg, |
113 | TypedArrayType typeValueArg> |
114 | struct FloatTypedArrayAdaptor { |
115 | typedef TypeArg Type; |
116 | typedef ViewTypeArg ViewType; |
117 | typedef JSViewTypeArg JSViewType; |
118 | static const TypedArrayType typeValue = typeValueArg; |
119 | constexpr static const TypeArg minValue = std::numeric_limits<TypeArg>::lowest(); |
120 | constexpr static const TypeArg maxValue = std::numeric_limits<TypeArg>::max(); |
121 | |
122 | static JSValue toJSValue(Type value) |
123 | { |
124 | return jsDoubleNumber(purifyNaN(value)); |
125 | } |
126 | |
127 | static double toDouble(Type value) |
128 | { |
129 | return static_cast<double>(value); |
130 | } |
131 | |
132 | static Type toNativeFromInt32(int32_t value) |
133 | { |
134 | return static_cast<Type>(value); |
135 | } |
136 | |
137 | static Type toNativeFromUint32(uint32_t value) |
138 | { |
139 | return static_cast<Type>(value); |
140 | } |
141 | |
142 | static Type toNativeFromDouble(double value) |
143 | { |
144 | return static_cast<Type>(value); |
145 | } |
146 | |
147 | template<typename OtherAdaptor> |
148 | static typename OtherAdaptor::Type convertTo(Type value) |
149 | { |
150 | return OtherAdaptor::toNativeFromDouble(value); |
151 | } |
152 | |
153 | static Optional<Type> toNativeFromInt32WithoutCoercion(int32_t value) |
154 | { |
155 | return static_cast<Type>(value); |
156 | } |
157 | |
158 | static Optional<Type> toNativeFromDoubleWithoutCoercion(double value) |
159 | { |
160 | if (std::isnan(value) || std::isinf(value)) |
161 | return static_cast<Type>(value); |
162 | |
163 | Type valueResult = static_cast<Type>(value); |
164 | |
165 | if (static_cast<double>(valueResult) != value) |
166 | return WTF::nullopt; |
167 | |
168 | if (value < minValue || value > maxValue) |
169 | return WTF::nullopt; |
170 | |
171 | return valueResult; |
172 | } |
173 | }; |
174 | |
175 | struct Int8Adaptor; |
176 | struct Int16Adaptor; |
177 | struct Int32Adaptor; |
178 | struct Uint8Adaptor; |
179 | struct Uint8ClampedAdaptor; |
180 | struct Uint16Adaptor; |
181 | struct Uint32Adaptor; |
182 | struct Float32Adaptor; |
183 | struct Float64Adaptor; |
184 | |
185 | template<typename Adaptor> class GenericTypedArrayView; |
186 | typedef GenericTypedArrayView<Int8Adaptor> Int8Array; |
187 | typedef GenericTypedArrayView<Int16Adaptor> Int16Array; |
188 | typedef GenericTypedArrayView<Int32Adaptor> Int32Array; |
189 | typedef GenericTypedArrayView<Uint8Adaptor> Uint8Array; |
190 | typedef GenericTypedArrayView<Uint8ClampedAdaptor> Uint8ClampedArray; |
191 | typedef GenericTypedArrayView<Uint16Adaptor> Uint16Array; |
192 | typedef GenericTypedArrayView<Uint32Adaptor> Uint32Array; |
193 | typedef GenericTypedArrayView<Float32Adaptor> Float32Array; |
194 | typedef GenericTypedArrayView<Float64Adaptor> Float64Array; |
195 | |
196 | template<typename Adaptor> class JSGenericTypedArrayView; |
197 | typedef JSGenericTypedArrayView<Int8Adaptor> JSInt8Array; |
198 | typedef JSGenericTypedArrayView<Int16Adaptor> JSInt16Array; |
199 | typedef JSGenericTypedArrayView<Int32Adaptor> JSInt32Array; |
200 | typedef JSGenericTypedArrayView<Uint8Adaptor> JSUint8Array; |
201 | typedef JSGenericTypedArrayView<Uint8ClampedAdaptor> JSUint8ClampedArray; |
202 | typedef JSGenericTypedArrayView<Uint16Adaptor> JSUint16Array; |
203 | typedef JSGenericTypedArrayView<Uint32Adaptor> JSUint32Array; |
204 | typedef JSGenericTypedArrayView<Float32Adaptor> JSFloat32Array; |
205 | typedef JSGenericTypedArrayView<Float64Adaptor> JSFloat64Array; |
206 | |
207 | struct Int8Adaptor : IntegralTypedArrayAdaptor<int8_t, Int8Array, JSInt8Array, TypeInt8> { }; |
208 | struct Int16Adaptor : IntegralTypedArrayAdaptor<int16_t, Int16Array, JSInt16Array, TypeInt16> { }; |
209 | struct Int32Adaptor : IntegralTypedArrayAdaptor<int32_t, Int32Array, JSInt32Array, TypeInt32> { }; |
210 | struct Uint8Adaptor : IntegralTypedArrayAdaptor<uint8_t, Uint8Array, JSUint8Array, TypeUint8> { }; |
211 | struct Uint16Adaptor : IntegralTypedArrayAdaptor<uint16_t, Uint16Array, JSUint16Array, TypeUint16> { }; |
212 | struct Uint32Adaptor : IntegralTypedArrayAdaptor<uint32_t, Uint32Array, JSUint32Array, TypeUint32> { }; |
213 | struct Float32Adaptor : FloatTypedArrayAdaptor<float, Float32Array, JSFloat32Array, TypeFloat32> { }; |
214 | struct Float64Adaptor : FloatTypedArrayAdaptor<double, Float64Array, JSFloat64Array, TypeFloat64> { }; |
215 | |
216 | struct Uint8ClampedAdaptor { |
217 | typedef uint8_t Type; |
218 | typedef Uint8ClampedArray ViewType; |
219 | typedef JSUint8ClampedArray JSViewType; |
220 | static const TypedArrayType typeValue = TypeUint8Clamped; |
221 | constexpr static const uint8_t minValue = std::numeric_limits<uint8_t>::lowest(); |
222 | constexpr static const uint8_t maxValue = std::numeric_limits<uint8_t>::max(); |
223 | |
224 | static JSValue toJSValue(uint8_t value) |
225 | { |
226 | return jsNumber(value); |
227 | } |
228 | |
229 | static double toDouble(uint8_t value) |
230 | { |
231 | return static_cast<double>(value); |
232 | } |
233 | |
234 | static Type toNativeFromInt32(int32_t value) |
235 | { |
236 | return clamp(value); |
237 | } |
238 | |
239 | static Type toNativeFromUint32(uint32_t value) |
240 | { |
241 | return std::min(static_cast<uint32_t>(255), value); |
242 | } |
243 | |
244 | static Type toNativeFromDouble(double value) |
245 | { |
246 | if (std::isnan(value) || value < 0) |
247 | return 0; |
248 | if (value > 255) |
249 | return 255; |
250 | return static_cast<uint8_t>(lrint(value)); |
251 | } |
252 | |
253 | template<typename OtherAdaptor> |
254 | static typename OtherAdaptor::Type convertTo(uint8_t value) |
255 | { |
256 | return OtherAdaptor::toNativeFromInt32(value); |
257 | } |
258 | |
259 | static Optional<Type> toNativeFromInt32WithoutCoercion(int32_t value) |
260 | { |
261 | if (value > maxValue || value < minValue) |
262 | return WTF::nullopt; |
263 | |
264 | return static_cast<Type>(value); |
265 | } |
266 | |
267 | static Optional<Type> toNativeFromDoubleWithoutCoercion(double value) |
268 | { |
269 | uint8_t integer = static_cast<uint8_t>(value); |
270 | if (static_cast<double>(integer) != value) |
271 | return WTF::nullopt; |
272 | |
273 | return integer; |
274 | } |
275 | |
276 | private: |
277 | static uint8_t clamp(int32_t value) |
278 | { |
279 | if (value < 0) |
280 | return 0; |
281 | if (value > 255) |
282 | return 255; |
283 | return static_cast<uint8_t>(value); |
284 | } |
285 | }; |
286 | |
287 | } // namespace JSC |
288 | |