1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecmascript/builtins/builtins_arraybuffer.h"
17
18 #include <typeinfo>
19
20 #include "ecmascript/base/builtins_base.h"
21 #include "ecmascript/base/number_helper.h"
22 #include "ecmascript/ecma_macros.h"
23 #include "ecmascript/ecma_vm.h"
24 #include "ecmascript/global_env.h"
25 #include "ecmascript/internal_call_params.h"
26 #include "ecmascript/js_arraybuffer.h"
27 #include "ecmascript/js_object-inl.h"
28 #include "ecmascript/js_tagged_number.h"
29 #include "ecmascript/js_tagged_value-inl.h"
30 #include "ecmascript/js_tagged_value.h"
31 #include "ecmascript/object_factory.h"
32 #include "securec.h"
33
34 namespace panda::ecmascript::builtins {
35 // 24.1.2.1 ArrayBuffer(length)
ArrayBufferConstructor(EcmaRuntimeCallInfo * argv)36 JSTaggedValue BuiltinsArrayBuffer::ArrayBufferConstructor(EcmaRuntimeCallInfo *argv)
37 {
38 ASSERT(argv);
39 BUILTINS_API_TRACE(argv->GetThread(), ArrayBuffer, Constructor);
40 JSThread *thread = argv->GetThread();
41 [[maybe_unused]] EcmaHandleScope handleScope(thread);
42 JSHandle<JSTaggedValue> newTarget = GetNewTarget(argv);
43 // 1. If NewTarget is undefined, throw a TypeError exception.
44 if (newTarget->IsUndefined()) {
45 THROW_TYPE_ERROR_AND_RETURN(thread, "newtarget is undefined", JSTaggedValue::Exception());
46 }
47 JSHandle<JSTaggedValue> lengthHandle = GetCallArg(argv, 0);
48 JSTaggedNumber lenNum = JSTaggedValue::ToIndex(thread, lengthHandle);
49 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
50 double length = lenNum.GetNumber();
51 return AllocateArrayBuffer(thread, newTarget, length);
52 }
53
54 // 24.1.3.1 ArrayBuffer.isView(arg)
IsView(EcmaRuntimeCallInfo * argv)55 JSTaggedValue BuiltinsArrayBuffer::IsView(EcmaRuntimeCallInfo *argv)
56 {
57 ASSERT(argv);
58 [[maybe_unused]] EcmaHandleScope handleScope(argv->GetThread());
59 JSHandle<JSTaggedValue> arg = GetCallArg(argv, 0);
60 // 1. If Type(arg) is not Object, return false.
61 if (!arg->IsECMAObject()) {
62 return BuiltinsArrayBuffer::GetTaggedBoolean(false);
63 }
64 // 2. If arg has a [[ViewedArrayBuffer]] internal slot, return true.
65 if (arg->IsDataView() || arg->IsTypedArray()) {
66 return BuiltinsArrayBuffer::GetTaggedBoolean(true);
67 }
68 // 3. Return false.
69 return BuiltinsArrayBuffer::GetTaggedBoolean(false);
70 }
71
72 // 24.1.3.3 get ArrayBuffer [ @@species ]
Species(EcmaRuntimeCallInfo * argv)73 JSTaggedValue BuiltinsArrayBuffer::Species(EcmaRuntimeCallInfo *argv)
74 {
75 ASSERT(argv);
76 return GetThis(argv).GetTaggedValue();
77 }
78
79 // 24.1.4.1 get ArrayBuffer.prototype.byteLength
GetByteLength(EcmaRuntimeCallInfo * argv)80 JSTaggedValue BuiltinsArrayBuffer::GetByteLength(EcmaRuntimeCallInfo *argv)
81 {
82 ASSERT(argv);
83 [[maybe_unused]] EcmaHandleScope handleScope(argv->GetThread());
84 JSThread *thread = argv->GetThread();
85 // 1. Let O be the this value.
86 JSHandle<JSTaggedValue> thisHandle = GetThis(argv);
87 // 2. If Type(O) is not Object, throw a TypeError exception.
88 if (!thisHandle->IsECMAObject()) {
89 THROW_TYPE_ERROR_AND_RETURN(thread, "this value is not an object", JSTaggedValue::Exception());
90 }
91 // 3. If O does not have an [[ArrayBufferData]] internal slot, throw a TypeError exception.
92 if (!thisHandle->IsArrayBuffer()) {
93 THROW_TYPE_ERROR_AND_RETURN(thread, "don't have internal slot", JSTaggedValue::Exception());
94 }
95 // 4. If IsDetachedBuffer(O) is true, throw a TypeError exception.
96 if (IsDetachedBuffer(thisHandle.GetTaggedValue())) {
97 THROW_TYPE_ERROR_AND_RETURN(thread, "IsDetachedBuffer", JSTaggedValue::Exception());
98 }
99 JSHandle<JSArrayBuffer> arrBuf(thisHandle);
100 // 5. Let length be the value of O’s [[ArrayBufferByteLength]] internal slot.
101 uint32_t length = arrBuf->GetArrayBufferByteLength();
102 // 6. Return length.
103 return JSTaggedValue(length);
104 }
105
106 // 24.1.4.3 ArrayBuffer.prototype.slice(start, end)
Slice(EcmaRuntimeCallInfo * argv)107 JSTaggedValue BuiltinsArrayBuffer::Slice(EcmaRuntimeCallInfo *argv)
108 {
109 ASSERT(argv);
110 BUILTINS_API_TRACE(argv->GetThread(), ArrayBuffer, Slice);
111 JSThread *thread = argv->GetThread();
112 [[maybe_unused]] EcmaHandleScope handleScope(thread);
113 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
114 const GlobalEnvConstants *globalConst = thread->GlobalConstants();
115 // 1. Let O be the this value.
116 JSHandle<JSTaggedValue> thisHandle = GetThis(argv);
117 // 2. If Type(O) is not Object, throw a TypeError exception.
118 if (!thisHandle->IsObject()) {
119 THROW_TYPE_ERROR_AND_RETURN(thread, "this value is not an object", JSTaggedValue::Exception());
120 }
121 JSHandle<JSArrayBuffer> arrBuf(thisHandle);
122 // 3. If O does not have an [[ArrayBufferData]] internal slot, throw a TypeError exception.
123 if (!thisHandle->IsArrayBuffer()) {
124 THROW_TYPE_ERROR_AND_RETURN(thread, "don't have internal slot", JSTaggedValue::Exception());
125 }
126 // 4. If IsDetachedBuffer(O) is true, throw a TypeError exception.
127 if (IsDetachedBuffer(thisHandle.GetTaggedValue())) {
128 THROW_TYPE_ERROR_AND_RETURN(thread, "this value IsDetachedBuffer", JSTaggedValue::Exception());
129 }
130 // 5. Let len be the value of O’s [[ArrayBufferByteLength]] internal slot.
131 int32_t len = arrBuf->GetArrayBufferByteLength();
132 JSHandle<JSTaggedValue> startHandle = GetCallArg(argv, 0);
133 // 6. Let relativeStart be ToInteger(start).
134 JSTaggedNumber relativeStart = JSTaggedValue::ToInteger(thread, startHandle);
135 // 7. ReturnIfAbrupt(relativeStart).
136 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
137 int32_t start = base::NumberHelper::DoubleInRangeInt32(relativeStart.GetNumber());
138 int32_t end;
139 int32_t first;
140 int32_t last;
141 // 8. If relativeStart < 0, let first be max((len + relativeStart),0); else let first be min(relativeStart, len).
142 if (start < 0) {
143 first = std::max((len + start), 0);
144 } else {
145 first = std::min(start, len);
146 }
147 // 9. If end is undefined, let relativeEnd be len; else let relativeEnd be ToInteger(end).
148 JSHandle<JSTaggedValue> endHandle = GetCallArg(argv, 1);
149 if (endHandle->IsUndefined()) {
150 end = len;
151 } else {
152 JSTaggedNumber relativeEnd = JSTaggedValue::ToInteger(thread, endHandle);
153 // 10. ReturnIfAbrupt(relativeEnd).
154 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
155 end = base::NumberHelper::DoubleInRangeInt32(relativeEnd.GetNumber());
156 }
157 // 11. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let final be min(relativeEnd, len).
158 if (end < 0) {
159 last = std::max((len + end), 0);
160 } else {
161 last = std::min(end, len);
162 }
163 // 12. Let newLen be max(final-first,0).
164 uint32_t newLen = std::max((last - first), 0);
165 // 13. Let ctor be SpeciesConstructor(O, %ArrayBuffer%).
166 JSHandle<JSTaggedValue> defaultConstructor = env->GetArrayBufferFunction();
167 JSHandle<JSObject> objHandle(thisHandle);
168 JSHandle<JSTaggedValue> constructor = JSObject::SpeciesConstructor(thread, objHandle, defaultConstructor);
169 // 14. ReturnIfAbrupt(ctor).
170 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
171 // 15. Let new be Construct(ctor, «newLen»).
172 JSHandle<JSTaggedValue> undefined = globalConst->GetHandledUndefined();
173 InternalCallParams *arguments = thread->GetInternalCallParams();
174 arguments->MakeArgv(JSTaggedValue(newLen));
175 JSTaggedValue taggedNewArrBuf = JSFunction::Construct(thread, constructor, 1, arguments->GetArgv(), undefined);
176 JSHandle<JSTaggedValue> newArrBuf(thread, taggedNewArrBuf);
177 // 16. ReturnIfAbrupt(new).
178 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
179 // 17. If new does not have an [[ArrayBufferData]] internal slot, throw a TypeError exception.
180 if (!newArrBuf->IsArrayBuffer()) {
181 THROW_TYPE_ERROR_AND_RETURN(thread, "don't have bufferdata internal slot", JSTaggedValue::Exception());
182 }
183 // 18. If IsDetachedBuffer(new) is true, throw a TypeError exception.
184 if (IsDetachedBuffer(newArrBuf.GetTaggedValue())) {
185 THROW_TYPE_ERROR_AND_RETURN(thread, "new arrayBuffer IsDetachedBuffer", JSTaggedValue::Exception());
186 }
187 // 19. If SameValue(new, O) is true, throw a TypeError exception.
188 if (JSTaggedValue::SameValue(newArrBuf.GetTaggedValue(), thisHandle.GetTaggedValue())) {
189 THROW_TYPE_ERROR_AND_RETURN(thread, "value of new arraybuffer and this is same", JSTaggedValue::Exception());
190 }
191 JSHandle<JSArrayBuffer> newJsArrBuf(newArrBuf);
192 // 20. If the value of new’s [[ArrayBufferByteLength]] internal slot < newLen, throw a TypeError exception.
193 uint32_t newArrBufLen = newJsArrBuf->GetArrayBufferByteLength();
194 if (newArrBufLen < newLen) {
195 THROW_TYPE_ERROR_AND_RETURN(thread, "new array buffer length smaller than newlen", JSTaggedValue::Exception());
196 }
197 // 21. NOTE: Side-effects of the above steps may have detached O.
198 // 22. If IsDetachedBuffer(O) is true, throw a TypeError exception.
199 if (IsDetachedBuffer(thisHandle.GetTaggedValue())) {
200 THROW_TYPE_ERROR_AND_RETURN(thread, "this value IsDetachedBuffer", JSTaggedValue::Exception());
201 }
202 if (newLen > 0) {
203 // 23. Let fromBuf be the value of O’s [[ArrayBufferData]] internal slot.
204 JSTaggedValue from = arrBuf->GetArrayBufferData();
205 // 24. Let toBuf be the value of new’s [[ArrayBufferData]] internal slot.
206 JSTaggedValue to = newJsArrBuf->GetArrayBufferData();
207 // 25. Perform CopyDataBlockBytes(toBuf, fromBuf, first, newLen).
208 JSArrayBuffer::CopyDataBlockBytes(to, from, first, newLen);
209 }
210 // Return new.
211 return newArrBuf.GetTaggedValue();
212 }
213
214 // 24.1.1.1 AllocateArrayBuffer(constructor, byteLength)
AllocateArrayBuffer(JSThread * thread,const JSHandle<JSTaggedValue> & newTarget,double byteLength)215 JSTaggedValue BuiltinsArrayBuffer::AllocateArrayBuffer(JSThread *thread, const JSHandle<JSTaggedValue> &newTarget,
216 double byteLength)
217 {
218 BUILTINS_API_TRACE(thread, ArrayBuffer, AllocateArrayBuffer);
219 /**
220 * 1. Let obj be OrdinaryCreateFromConstructor(constructor, "%ArrayBufferPrototype%",
221 * «[[ArrayBufferData]], [[ArrayBufferByteLength]]» ).
222 * */
223 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
224 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
225 JSHandle<JSTaggedValue> arrBufFunc = env->GetArrayBufferFunction();
226 JSHandle<JSObject> obj;
227 if (!newTarget->IsBoundFunction()) {
228 obj = factory->NewJSObjectByConstructor(JSHandle<JSFunction>(arrBufFunc), newTarget);
229 // 2. ReturnIfAbrupt
230 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
231 } else {
232 JSHandle<JSTaggedValue> prototypeKey = thread->GlobalConstants()->GetHandledPrototypeString();
233 JSHandle<JSTaggedValue> constructTag(newTarget);
234 JSHandle<JSTaggedValue> constructProto =
235 JSTaggedValue::GetProperty(thread, constructTag, prototypeKey).GetValue();
236 obj = JSObject::ObjectCreate(thread, JSHandle<JSObject>(constructProto));
237 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
238 }
239 // 3. Assert: byteLength is a positive integer.
240 ASSERT(JSTaggedValue(byteLength).IsInteger());
241 ASSERT(byteLength >= 0);
242 // 4. Let block be CreateByteDataBlock(byteLength).
243 if (byteLength > INT_MAX) {
244 THROW_RANGE_ERROR_AND_RETURN(thread, "Out of range", JSTaggedValue::Exception());
245 }
246 JSHandle<JSArrayBuffer> arrayBuffer(obj);
247 // 6. Set obj’s [[ArrayBufferData]] internal slot to block.
248 factory->NewJSArrayBufferData(arrayBuffer, byteLength);
249 // 7. Set obj’s [[ArrayBufferByteLength]] internal slot to byteLength.
250 arrayBuffer->SetArrayBufferByteLength(static_cast<uint32_t>(byteLength));
251 // 8. Return obj.
252 return arrayBuffer.GetTaggedValue();
253 }
254
255 // 24.1.1.2 IsDetachedBuffer()
IsDetachedBuffer(JSTaggedValue arrayBuffer)256 bool BuiltinsArrayBuffer::IsDetachedBuffer(JSTaggedValue arrayBuffer)
257 {
258 // 1. Assert: Type(arrayBuffer) is Object and it has an [[ArrayBufferData]] internal slot.
259 ASSERT(arrayBuffer.IsArrayBuffer());
260 JSArrayBuffer *buffer = JSArrayBuffer::Cast(arrayBuffer.GetTaggedObject());
261 JSTaggedValue dataSlot = buffer->GetArrayBufferData();
262 // 2. If arrayBuffer’s [[ArrayBufferData]] internal slot is null, return true.
263 // 3. Return false.
264 return dataSlot == JSTaggedValue::Null();
265 }
266
267 // 24.1.1.4
CloneArrayBuffer(JSThread * thread,const JSHandle<JSTaggedValue> & srcBuffer,uint32_t srcByteOffset,JSHandle<JSTaggedValue> constructor)268 JSTaggedValue BuiltinsArrayBuffer::CloneArrayBuffer(JSThread *thread, const JSHandle<JSTaggedValue> &srcBuffer,
269 uint32_t srcByteOffset, JSHandle<JSTaggedValue> constructor)
270 {
271 BUILTINS_API_TRACE(thread, ArrayBuffer, CloneArrayBuffer);
272 // 1. Assert: Type(srcBuffer) is Object and it has an [[ArrayBufferData]] internal slot.
273 ASSERT(srcBuffer->IsArrayBuffer());
274 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
275 // 2. If cloneConstructor is not present
276 if (constructor->IsUndefined()) {
277 // a. Let cloneConstructor be SpeciesConstructor(srcBuffer, %ArrayBuffer%).
278 JSHandle<JSTaggedValue> defaultConstructor = env->GetArrayBufferFunction();
279 JSHandle<JSObject> objHandle(srcBuffer);
280 constructor = JSObject::SpeciesConstructor(thread, objHandle, defaultConstructor);
281 // b. ReturnIfAbrupt(cloneConstructor).
282 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
283 // c. If IsDetachedBuffer(srcBuffer) is true, throw a TypeError exception.
284 if (IsDetachedBuffer(srcBuffer.GetTaggedValue())) {
285 THROW_TYPE_ERROR_AND_RETURN(thread, "Is Detached Buffer", JSTaggedValue::Exception());
286 } else {
287 ASSERT(constructor->IsConstructor());
288 }
289 }
290 // 4. Let srcLength be the value of srcBuffer’s [[ArrayBufferByteLength]] internal slot.
291 JSHandle<JSArrayBuffer> arrBuf(srcBuffer);
292 uint32_t srcLen = arrBuf->GetArrayBufferByteLength();
293 // 5. Assert: srcByteOffset ≤ srcLength.
294 ASSERT(srcByteOffset <= srcLen);
295 // 6. Let cloneLength be srcLength – srcByteOffset.
296 int32_t cloneLen = srcLen - srcByteOffset;
297 // 8. Let targetBuffer be AllocateArrayBuffer(cloneConstructor, cloneLength).
298 JSTaggedValue taggedBuf = AllocateArrayBuffer(thread, constructor, cloneLen);
299 // 9. ReturnIfAbrupt(targetBuffer).
300 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
301 // 10. If IsDetachedBuffer(srcBuffer) is true, throw a TypeError exception.
302 if (IsDetachedBuffer(srcBuffer.GetTaggedValue())) {
303 THROW_TYPE_ERROR_AND_RETURN(thread, "Is Detached Buffer", JSTaggedValue::Exception());
304 }
305 // 11. Let targetBlock be the value of targetBuffer’s [[ArrayBufferData]] internal slot.
306 JSHandle<JSArrayBuffer> newArrBuf(thread, taggedBuf);
307 // Perform CopyDataBlockBytes(targetBlock, 0, srcBlock, srcByteOffset, cloneLength).
308 // 7. Let srcBlock be the value of srcBuffer’s [[ArrayBufferData]] internal slot.
309 JSTaggedValue srcBlock = arrBuf->GetArrayBufferData();
310 JSTaggedValue targetBlock = newArrBuf->GetArrayBufferData();
311 if (cloneLen > 0) {
312 JSArrayBuffer::CopyDataBlockBytes(targetBlock, srcBlock, srcByteOffset, cloneLen);
313 }
314 return taggedBuf;
315 }
316
317 // 24.1.1.5
318 // NOLINTNEXTLINE(readability-function-size)
GetValueFromBuffer(JSTaggedValue arrBuf,uint32_t byteIndex,DataViewType type,bool littleEndian)319 JSTaggedValue BuiltinsArrayBuffer::GetValueFromBuffer(JSTaggedValue arrBuf, uint32_t byteIndex, DataViewType type,
320 bool littleEndian)
321 {
322 JSArrayBuffer *jsArrayBuffer = JSArrayBuffer::Cast(arrBuf.GetTaggedObject());
323 JSTaggedValue data = jsArrayBuffer->GetArrayBufferData();
324 void *pointer = JSNativePointer::Cast(data.GetTaggedObject())->GetExternalPointer();
325 auto *block = reinterpret_cast<uint8_t *>(pointer);
326 switch (type) {
327 case DataViewType::UINT8:
328 case DataViewType::UINT8_CLAMPED: {
329 uint8_t res = block[byteIndex]; // NOLINT
330 return GetTaggedInt(res);
331 }
332 case DataViewType::INT8: {
333 uint8_t res = block[byteIndex]; // NOLINT
334 auto int8Res = static_cast<int8_t>(res);
335 return GetTaggedInt(int8Res);
336 }
337 case DataViewType::UINT16:
338 return GetValueFromBufferForInteger<uint16_t, NumberSize::UINT16>(block, byteIndex, littleEndian);
339 case DataViewType::INT16:
340 return GetValueFromBufferForInteger<int16_t, NumberSize::INT16>(block, byteIndex, littleEndian);
341 case DataViewType::UINT32:
342 return GetValueFromBufferForInteger<uint32_t, NumberSize::UINT32>(block, byteIndex, littleEndian);
343 case DataViewType::INT32:
344 return GetValueFromBufferForInteger<int32_t, NumberSize::INT32>(block, byteIndex, littleEndian);
345 case DataViewType::FLOAT32:
346 return GetValueFromBufferForFloat<float, UnionType32, NumberSize::FLOAT32>(block, byteIndex, littleEndian);
347 case DataViewType::FLOAT64:
348 return GetValueFromBufferForFloat<double, UnionType64, NumberSize::FLOAT64>(block, byteIndex, littleEndian);
349 default:
350 break;
351 }
352
353 UNREACHABLE();
354 }
355
356 // 24.1.1.6
SetValueInBuffer(JSTaggedValue arrBuf,uint32_t byteIndex,DataViewType type,JSTaggedNumber value,bool littleEndian)357 JSTaggedValue BuiltinsArrayBuffer::SetValueInBuffer(JSTaggedValue arrBuf, uint32_t byteIndex, DataViewType type,
358 JSTaggedNumber value, bool littleEndian)
359 {
360 JSArrayBuffer *jsArrayBuffer = JSArrayBuffer::Cast(arrBuf.GetTaggedObject());
361 JSTaggedValue data = jsArrayBuffer->GetArrayBufferData();
362 void *pointer = JSNativePointer::Cast(data.GetTaggedObject())->GetExternalPointer();
363 auto *block = reinterpret_cast<uint8_t *>(pointer);
364 double val = value.GetNumber();
365 switch (type) {
366 case DataViewType::UINT8:
367 SetValueInBufferForByte<uint8_t>(val, block, byteIndex);
368 break;
369 case DataViewType::UINT8_CLAMPED:
370 SetValueInBufferForUint8Clamped(val, block, byteIndex);
371 break;
372 case DataViewType::INT8:
373 SetValueInBufferForByte<int8_t>(val, block, byteIndex);
374 break;
375 case DataViewType::UINT16:
376 SetValueInBufferForInteger<uint16_t>(val, block, byteIndex, littleEndian);
377 break;
378 case DataViewType::INT16:
379 SetValueInBufferForInteger<int16_t>(val, block, byteIndex, littleEndian);
380 break;
381 case DataViewType::UINT32:
382 SetValueInBufferForInteger<uint32_t>(val, block, byteIndex, littleEndian);
383 break;
384 case DataViewType::INT32:
385 SetValueInBufferForInteger<int32_t>(val, block, byteIndex, littleEndian);
386 break;
387 case DataViewType::FLOAT32:
388 SetValueInBufferForFloat<float>(val, block, byteIndex, littleEndian);
389 break;
390 case DataViewType::FLOAT64:
391 SetValueInBufferForFloat<double>(val, block, byteIndex, littleEndian);
392 break;
393 default:
394 UNREACHABLE();
395 }
396 return JSTaggedValue::Undefined();
397 }
398
399 template<typename T>
SetTypeData(uint8_t * block,T value,uint32_t index)400 void BuiltinsArrayBuffer::SetTypeData(uint8_t *block, T value, uint32_t index)
401 {
402 uint32_t sizeCount = sizeof(T);
403 auto *res = reinterpret_cast<uint8_t *>(&value);
404 for (uint32_t i = 0; i < sizeCount; i++) {
405 *(block + index + i) = *(res + i); // NOLINT
406 }
407 }
408
409 template <typename T>
LittleEndianToBigEndian(T liValue)410 T BuiltinsArrayBuffer::LittleEndianToBigEndian(T liValue)
411 {
412 uint8_t sizeCount = sizeof(T);
413 T biValue;
414 switch (sizeCount) {
415 case NumberSize::UINT16:
416 biValue = ((liValue & 0x00FF) << BITS_EIGHT) // NOLINT
417 | ((liValue & 0xFF00) >> BITS_EIGHT); // NOLINT
418 break;
419 case NumberSize::UINT32:
420 biValue = ((liValue & 0x000000FF) << BITS_TWENTY_FOUR) // NOLINT
421 | ((liValue & 0x0000FF00) << BITS_EIGHT) // NOLINT
422 | ((liValue & 0x00FF0000) >> BITS_EIGHT) // NOLINT
423 | ((liValue & 0xFF000000) >> BITS_TWENTY_FOUR); // NOLINT
424 break;
425 default:
426 UNREACHABLE();
427 break;
428 }
429 return biValue;
430 }
431
LittleEndianToBigEndianUint64(uint64_t liValue)432 uint64_t BuiltinsArrayBuffer::LittleEndianToBigEndianUint64(uint64_t liValue)
433 {
434 return ((liValue & 0x00000000000000FF) << BITS_FIFTY_SIX) // NOLINT
435 | ((liValue & 0x000000000000FF00) << BITS_FORTY) // NOLINT
436 | ((liValue & 0x0000000000FF0000) << BITS_TWENTY_FOUR) // NOLINT
437 | ((liValue & 0x00000000FF000000) << BITS_EIGHT) // NOLINT
438 | ((liValue & 0x000000FF00000000) >> BITS_EIGHT) // NOLINT
439 | ((liValue & 0x0000FF0000000000) >> BITS_TWENTY_FOUR) // NOLINT
440 | ((liValue & 0x00FF000000000000) >> BITS_FORTY) // NOLINT
441 | ((liValue & 0xFF00000000000000) >> BITS_FIFTY_SIX); // NOLINT
442 }
443
444 template<typename T, BuiltinsArrayBuffer::NumberSize size>
GetValueFromBufferForInteger(uint8_t * block,uint32_t byteIndex,bool littleEndian)445 JSTaggedValue BuiltinsArrayBuffer::GetValueFromBufferForInteger(uint8_t *block, uint32_t byteIndex, bool littleEndian)
446 {
447 static_assert(std::is_integral_v<T>, "T must be integral");
448 static_assert(sizeof(T) == size, "Invalid number size");
449 static_assert(sizeof(T) >= sizeof(uint16_t), "T must have a size more than uint8");
450
451 ASSERT(size >= NumberSize::UINT16 || size <= NumberSize::FLOAT64);
452 T res = *reinterpret_cast<T *>(block + byteIndex);
453 if (!littleEndian) {
454 res = LittleEndianToBigEndian(res);
455 }
456
457 // uint32_t maybe overflow with TaggedInt
458 // NOLINTNEXTLINE(readability-braces-around-statements,bugprone-suspicious-semicolon)
459 if constexpr (std::is_same_v<T, uint32_t>) {
460 // NOLINTNEXTLINE(clang-diagnostic-sign-compare)
461 if (res > static_cast<uint32_t>(std::numeric_limits<int32_t>::max())) {
462 return GetTaggedDouble(static_cast<double>(res));
463 }
464 }
465 return GetTaggedInt(res);
466 }
467
468 template<typename T, typename UnionType, BuiltinsArrayBuffer::NumberSize size>
GetValueFromBufferForFloat(uint8_t * block,uint32_t byteIndex,bool littleEndian)469 JSTaggedValue BuiltinsArrayBuffer::GetValueFromBufferForFloat(uint8_t *block, uint32_t byteIndex, bool littleEndian)
470 {
471 static_assert(std::is_same_v<T, float> || std::is_same_v<T, double>, "T must be correct type");
472 static_assert(sizeof(T) == size, "Invalid number size");
473
474 UnionType unionValue = {0};
475 // NOLINTNEXTLINE(readability-braces-around-statements)
476 if constexpr (std::is_same_v<T, float>) {
477 unionValue.uValue = *reinterpret_cast<uint32_t *>(block + byteIndex);
478 if (std::isnan(unionValue.value)) {
479 return GetTaggedDouble(unionValue.value);
480 }
481 if (!littleEndian) {
482 uint32_t res = LittleEndianToBigEndian(unionValue.uValue);
483 return GetTaggedDouble(bit_cast<T>(res));
484 }
485 } else if constexpr (std::is_same_v<T, double>) { // NOLINTNEXTLINE(readability-braces-around-statements)
486 unionValue.uValue = *reinterpret_cast<uint64_t *>(block + byteIndex);
487 if (std::isnan(unionValue.value) && !JSTaggedValue::IsImpureNaN(unionValue.value)) {
488 return GetTaggedDouble(unionValue.value);
489 }
490 if (!littleEndian) {
491 uint64_t res = LittleEndianToBigEndianUint64(unionValue.uValue);
492 return GetTaggedDouble(bit_cast<T>(res));
493 }
494 }
495
496 return GetTaggedDouble(unionValue.value);
497 }
498
499 template<typename T>
SetValueInBufferForByte(double val,uint8_t * block,uint32_t byteIndex)500 void BuiltinsArrayBuffer::SetValueInBufferForByte(double val, uint8_t *block, uint32_t byteIndex)
501 {
502 static_assert(std::is_same_v<T, uint8_t> || std::is_same_v<T, int8_t>, "T must be int8/uint8");
503 T res;
504 if (std::isnan(val) || std::isinf(val)) {
505 res = 0;
506 SetTypeData(block, res, byteIndex);
507 return;
508 }
509 auto int64Val = static_cast<int64_t>(val);
510 auto *resArr = reinterpret_cast<T *>(&int64Val);
511 res = *resArr;
512 SetTypeData(block, res, byteIndex);
513 }
514
SetValueInBufferForUint8Clamped(double val,uint8_t * block,uint32_t byteIndex)515 void BuiltinsArrayBuffer::SetValueInBufferForUint8Clamped(double val, uint8_t *block, uint32_t byteIndex)
516 {
517 uint8_t res;
518 if (std::isnan(val) || val <= 0) {
519 res = 0;
520 SetTypeData(block, res, byteIndex);
521 return;
522 }
523 val = val >= UINT8_MAX ? UINT8_MAX : val;
524 constexpr double HALF = 0.5;
525 val = val == HALF ? 0 : std::round(val);
526 res = static_cast<int64_t>(val);
527 SetTypeData(block, res, byteIndex);
528 }
529
530 template<typename T>
SetValueInBufferForInteger(double val,uint8_t * block,uint32_t byteIndex,bool littleEndian)531 void BuiltinsArrayBuffer::SetValueInBufferForInteger(double val, uint8_t *block, uint32_t byteIndex, bool littleEndian)
532 {
533 static_assert(std::is_integral_v<T>, "T must be integral");
534 static_assert(sizeof(T) >= sizeof(uint16_t), "T must have a size more than uint8");
535 T res;
536 if (std::isnan(val) || std::isinf(val)) {
537 res = 0;
538 SetTypeData(block, res, byteIndex);
539 return;
540 }
541 auto int64Val = static_cast<int64_t>(val);
542 // NOLINTNEXTLINE(readability-braces-around-statements)
543 if constexpr (std::is_same_v<T, uint16_t>) {
544 auto *pTmp = reinterpret_cast<int16_t *>(&int64Val);
545 int16_t tmp = *pTmp;
546 res = static_cast<T>(tmp);
547 } else { // NOLINTNEXTLINE(readability-braces-around-statements)
548 auto *pTmp = reinterpret_cast<T *>(&int64Val);
549 res = *pTmp;
550 }
551
552 if (!littleEndian) {
553 res = LittleEndianToBigEndian<T>(res);
554 }
555 SetTypeData(block, res, byteIndex);
556 }
557
558 template<typename T>
SetValueInBufferForFloat(double val,uint8_t * block,uint32_t byteIndex,bool littleEndian)559 void BuiltinsArrayBuffer::SetValueInBufferForFloat(double val, uint8_t *block, uint32_t byteIndex, bool littleEndian)
560 {
561 static_assert(std::is_same_v<T, float> || std::is_same_v<T, double>, "T must be float type");
562 auto data = static_cast<T>(val);
563 if (std::isnan(val)) {
564 SetTypeData(block, data, byteIndex);
565 return;
566 }
567 if (!littleEndian) {
568 if constexpr (std::is_same_v<T, float>) {
569 uint32_t res = bit_cast<uint32_t>(data);
570 data = bit_cast<T>(LittleEndianToBigEndian(res));
571 } else if constexpr (std::is_same_v<T, double>) {
572 uint64_t res = bit_cast<uint64_t>(data);
573 data = bit_cast<T>(LittleEndianToBigEndianUint64(res));
574 }
575 }
576 SetTypeData(block, data, byteIndex);
577 }
578 } // namespace panda::ecmascript::builtins
579