/* * Copyright (c) 2021-2022 Huawei Device Co., Ltd. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "ecmascript/builtins/builtins_arraybuffer.h" #include #include "ecmascript/base/builtins_base.h" #include "ecmascript/base/number_helper.h" #include "ecmascript/builtins/builtins_bigint.h" #include "ecmascript/ecma_macros.h" #include "ecmascript/ecma_vm.h" #include "ecmascript/global_env.h" #include "ecmascript/interpreter/interpreter.h" #include "ecmascript/js_arraybuffer.h" #include "ecmascript/js_object-inl.h" #include "ecmascript/js_tagged_number.h" #include "ecmascript/js_tagged_value-inl.h" #include "ecmascript/js_tagged_value.h" #include "ecmascript/object_factory.h" #include "securec.h" namespace panda::ecmascript::builtins { // 24.1.2.1 ArrayBuffer(length) JSTaggedValue BuiltinsArrayBuffer::ArrayBufferConstructor(EcmaRuntimeCallInfo *argv) { ASSERT(argv); JSThread *thread = argv->GetThread(); BUILTINS_API_TRACE(thread, ArrayBuffer, Constructor); [[maybe_unused]] EcmaHandleScope handleScope(thread); JSHandle newTarget = GetNewTarget(argv); // 1. If NewTarget is undefined, throw a TypeError exception. if (newTarget->IsUndefined()) { THROW_TYPE_ERROR_AND_RETURN(thread, "newtarget is undefined", JSTaggedValue::Exception()); } JSHandle lengthHandle = GetCallArg(argv, 0); JSTaggedNumber lenNum = JSTaggedValue::ToIndex(thread, lengthHandle); RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); uint64_t length = lenNum.GetNumber(); return AllocateArrayBuffer(thread, newTarget, length); } // 24.1.3.1 ArrayBuffer.isView(arg) JSTaggedValue BuiltinsArrayBuffer::IsView(EcmaRuntimeCallInfo *argv) { ASSERT(argv); JSThread *thread = argv->GetThread(); BUILTINS_API_TRACE(thread, ArrayBuffer, IsView); [[maybe_unused]] EcmaHandleScope handleScope(thread); JSHandle arg = GetCallArg(argv, 0); // 1. If Type(arg) is not Object, return false. if (!arg->IsECMAObject()) { return BuiltinsArrayBuffer::GetTaggedBoolean(false); } // 2. If arg has a [[ViewedArrayBuffer]] internal slot, return true. if (arg->IsDataView() || arg->IsTypedArray()) { return BuiltinsArrayBuffer::GetTaggedBoolean(true); } // 3. Return false. return BuiltinsArrayBuffer::GetTaggedBoolean(false); } // 24.1.3.3 get ArrayBuffer [ @@species ] JSTaggedValue BuiltinsArrayBuffer::Species(EcmaRuntimeCallInfo *argv) { ASSERT(argv); BUILTINS_API_TRACE(argv->GetThread(), ArrayBuffer, Species); return GetThis(argv).GetTaggedValue(); } // 24.1.4.1 get ArrayBuffer.prototype.byteLength JSTaggedValue BuiltinsArrayBuffer::GetByteLength(EcmaRuntimeCallInfo *argv) { ASSERT(argv); JSThread *thread = argv->GetThread(); BUILTINS_API_TRACE(thread, ArrayBuffer, GetByteLength); [[maybe_unused]] EcmaHandleScope handleScope(thread); // 1. Let O be the this value. JSHandle thisHandle = GetThis(argv); // 2. If Type(O) is not Object, throw a TypeError exception. if (!thisHandle->IsECMAObject()) { THROW_TYPE_ERROR_AND_RETURN(thread, "this value is not an object", JSTaggedValue::Exception()); } // 3. If O does not have an [[ArrayBufferData]] internal slot, throw a TypeError exception. if (!thisHandle->IsArrayBuffer()) { THROW_TYPE_ERROR_AND_RETURN(thread, "don't have internal slot", JSTaggedValue::Exception()); } // 4. If IsDetachedBuffer(O) is true, throw a TypeError exception. if (IsDetachedBuffer(thisHandle.GetTaggedValue())) { THROW_TYPE_ERROR_AND_RETURN(thread, "IsDetachedBuffer", JSTaggedValue::Exception()); } JSHandle arrBuf(thisHandle); // 5. Let length be the value of O’s [[ArrayBufferByteLength]] internal slot. uint32_t length = arrBuf->GetArrayBufferByteLength(); // 6. Return length. return JSTaggedValue(length); } // 24.1.4.3 ArrayBuffer.prototype.slice(start, end) JSTaggedValue BuiltinsArrayBuffer::Slice(EcmaRuntimeCallInfo *argv) { ASSERT(argv); JSThread *thread = argv->GetThread(); BUILTINS_API_TRACE(thread, ArrayBuffer, Slice); [[maybe_unused]] EcmaHandleScope handleScope(thread); JSHandle env = thread->GetEcmaVM()->GetGlobalEnv(); // 1. Let O be the this value. JSHandle thisHandle = GetThis(argv); // 2. If Type(O) is not Object, throw a TypeError exception. if (!thisHandle->IsHeapObject()) { THROW_TYPE_ERROR_AND_RETURN(thread, "this value is not an object", JSTaggedValue::Exception()); } JSHandle arrBuf(thisHandle); // 3. If O does not have an [[ArrayBufferData]] internal slot, throw a TypeError exception. if (!thisHandle->IsArrayBuffer()) { THROW_TYPE_ERROR_AND_RETURN(thread, "don't have internal slot", JSTaggedValue::Exception()); } // 4. If IsDetachedBuffer(O) is true, throw a TypeError exception. if (IsDetachedBuffer(thisHandle.GetTaggedValue())) { THROW_TYPE_ERROR_AND_RETURN(thread, "this value IsDetachedBuffer", JSTaggedValue::Exception()); } // 5. Let len be the value of O’s [[ArrayBufferByteLength]] internal slot. int32_t len = static_cast(arrBuf->GetArrayBufferByteLength()); JSHandle startHandle = GetCallArg(argv, 0); // 6. Let relativeStart be ToInteger(start). JSTaggedNumber relativeStart = JSTaggedValue::ToInteger(thread, startHandle); // 7. ReturnIfAbrupt(relativeStart). RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); int32_t start = base::NumberHelper::DoubleInRangeInt32(relativeStart.GetNumber()); int32_t end = 0; int32_t first = 0; int32_t last = 0; // 8. If relativeStart < 0, let first be max((len + relativeStart),0); else let first be min(relativeStart, len). if (start < 0) { first = std::max((len + start), 0); } else { first = std::min(start, len); } // 9. If end is undefined, let relativeEnd be len; else let relativeEnd be ToInteger(end). JSHandle endHandle = GetCallArg(argv, 1); if (endHandle->IsUndefined()) { end = len; } else { JSTaggedNumber relativeEnd = JSTaggedValue::ToInteger(thread, endHandle); // 10. ReturnIfAbrupt(relativeEnd). RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); end = base::NumberHelper::DoubleInRangeInt32(relativeEnd.GetNumber()); } // 11. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let final be min(relativeEnd, len). if (end < 0) { last = std::max((len + end), 0); } else { last = std::min(end, len); } // 12. Let newLen be max(final-first,0). uint32_t newLen = std::max((last - first), 0); // 13. Let ctor be SpeciesConstructor(O, %ArrayBuffer%). JSHandle defaultConstructor = env->GetArrayBufferFunction(); JSHandle objHandle(thisHandle); JSHandle constructor = JSObject::SpeciesConstructor(thread, objHandle, defaultConstructor); // 14. ReturnIfAbrupt(ctor). RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); // 15. Let new be Construct(ctor, «newLen»). JSHandle undefined = thread->GlobalConstants()->GetHandledUndefined(); EcmaRuntimeCallInfo *info = EcmaInterpreter::NewRuntimeCallInfo(thread, constructor, undefined, undefined, 1); RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); info->SetCallArg(JSTaggedValue(newLen)); JSTaggedValue taggedNewArrBuf = JSFunction::Construct(info); RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); JSHandle newArrBuf(thread, taggedNewArrBuf); // 16. ReturnIfAbrupt(new). RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); // 17. If new does not have an [[ArrayBufferData]] internal slot, throw a TypeError exception. if (!newArrBuf->IsArrayBuffer()) { THROW_TYPE_ERROR_AND_RETURN(thread, "don't have bufferdata internal slot", JSTaggedValue::Exception()); } // 18. If IsDetachedBuffer(new) is true, throw a TypeError exception. if (IsDetachedBuffer(newArrBuf.GetTaggedValue())) { THROW_TYPE_ERROR_AND_RETURN(thread, "new arrayBuffer IsDetachedBuffer", JSTaggedValue::Exception()); } // 19. If SameValue(new, O) is true, throw a TypeError exception. if (JSTaggedValue::SameValue(newArrBuf.GetTaggedValue(), thisHandle.GetTaggedValue())) { THROW_TYPE_ERROR_AND_RETURN(thread, "value of new arraybuffer and this is same", JSTaggedValue::Exception()); } JSHandle newJsArrBuf(newArrBuf); // 20. If the value of new’s [[ArrayBufferByteLength]] internal slot < newLen, throw a TypeError exception. uint32_t newArrBufLen = newJsArrBuf->GetArrayBufferByteLength(); if (newArrBufLen < newLen) { THROW_TYPE_ERROR_AND_RETURN(thread, "new array buffer length smaller than newlen", JSTaggedValue::Exception()); } // 21. NOTE: Side-effects of the above steps may have detached O. // 22. If IsDetachedBuffer(O) is true, throw a TypeError exception. if (IsDetachedBuffer(thisHandle.GetTaggedValue())) { THROW_TYPE_ERROR_AND_RETURN(thread, "this value IsDetachedBuffer", JSTaggedValue::Exception()); } if (newLen > 0) { // 23. Let fromBuf be the value of O’s [[ArrayBufferData]] internal slot. void *fromBuf = GetDataPointFromBuffer(arrBuf.GetTaggedValue()); // 24. Let toBuf be the value of new’s [[ArrayBufferData]] internal slot. void *toBuf = GetDataPointFromBuffer(newJsArrBuf.GetTaggedValue()); // 25. Perform CopyDataBlockBytes(toBuf, fromBuf, first, newLen). JSArrayBuffer::CopyDataPointBytes(toBuf, fromBuf, first, newLen); } // Return new. return newArrBuf.GetTaggedValue(); } // 24.1.1.1 AllocateArrayBuffer(constructor, byteLength) JSTaggedValue BuiltinsArrayBuffer::AllocateArrayBuffer(JSThread *thread, const JSHandle &newTarget, uint64_t byteLength) { BUILTINS_API_TRACE(thread, ArrayBuffer, AllocateArrayBuffer); /** * 1. Let obj be OrdinaryCreateFromConstructor(constructor, "%ArrayBufferPrototype%", * «[[ArrayBufferData]], [[ArrayBufferByteLength]]» ). * */ ObjectFactory *factory = thread->GetEcmaVM()->GetFactory(); JSHandle env = thread->GetEcmaVM()->GetGlobalEnv(); JSHandle arrBufFunc = env->GetArrayBufferFunction(); JSHandle obj = factory->NewJSObjectByConstructor(JSHandle(arrBufFunc), newTarget); // 2. ReturnIfAbrupt RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); // 4. Let block be CreateByteDataBlock(byteLength). if (byteLength > INT_MAX) { THROW_RANGE_ERROR_AND_RETURN(thread, "Out of range", JSTaggedValue::Exception()); } uint32_t arrayByteLength = static_cast(byteLength); JSHandle arrayBuffer(obj); // 6. Set obj’s [[ArrayBufferData]] internal slot to block. factory->NewJSArrayBufferData(arrayBuffer, arrayByteLength); // 7. Set obj’s [[ArrayBufferByteLength]] internal slot to byteLength. arrayBuffer->SetArrayBufferByteLength(arrayByteLength); // 8. Return obj. return arrayBuffer.GetTaggedValue(); } // 24.1.1.2 IsDetachedBuffer() bool BuiltinsArrayBuffer::IsDetachedBuffer(JSTaggedValue arrayBuffer) { if (arrayBuffer.IsByteArray()) { return false; } // 1. Assert: Type(arrayBuffer) is Object and it has an [[ArrayBufferData]] internal slot. ASSERT(arrayBuffer.IsArrayBuffer() || arrayBuffer.IsSharedArrayBuffer()); JSArrayBuffer *buffer = JSArrayBuffer::Cast(arrayBuffer.GetTaggedObject()); JSTaggedValue dataSlot = buffer->GetArrayBufferData(); // 2. If arrayBuffer’s [[ArrayBufferData]] internal slot is null, return true. // 3. Return false. return dataSlot.IsNull(); } // 24.1.1.4 JSTaggedValue BuiltinsArrayBuffer::CloneArrayBuffer(JSThread *thread, const JSHandle &srcBuffer, uint32_t srcByteOffset, JSHandle constructor) { BUILTINS_API_TRACE(thread, ArrayBuffer, CloneArrayBuffer); // 1. Assert: Type(srcBuffer) is Object and it has an [[ArrayBufferData]] internal slot. ASSERT(srcBuffer->IsArrayBuffer() || srcBuffer->IsSharedArrayBuffer()); JSHandle env = thread->GetEcmaVM()->GetGlobalEnv(); // 2. If cloneConstructor is not present if (constructor->IsUndefined()) { // a. Let cloneConstructor be SpeciesConstructor(srcBuffer, %ArrayBuffer%). JSHandle defaultConstructor = env->GetArrayBufferFunction(); JSHandle objHandle(srcBuffer); constructor = JSObject::SpeciesConstructor(thread, objHandle, defaultConstructor); // b. ReturnIfAbrupt(cloneConstructor). RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); // c. If IsDetachedBuffer(srcBuffer) is true, throw a TypeError exception. if (IsDetachedBuffer(srcBuffer.GetTaggedValue())) { THROW_TYPE_ERROR_AND_RETURN(thread, "Is Detached Buffer", JSTaggedValue::Exception()); } else { ASSERT(constructor->IsConstructor()); } } // 4. Let srcLength be the value of srcBuffer’s [[ArrayBufferByteLength]] internal slot. JSHandle arrBuf(srcBuffer); uint32_t srcLen = arrBuf->GetArrayBufferByteLength(); // 5. Assert: srcByteOffset ≤ srcLength. ASSERT(srcByteOffset <= srcLen); // 6. Let cloneLength be srcLength – srcByteOffset. int32_t cloneLen = static_cast(srcLen - srcByteOffset); // 8. Let targetBuffer be AllocateArrayBuffer(cloneConstructor, cloneLength). JSTaggedValue taggedBuf = AllocateArrayBuffer(thread, constructor, cloneLen); // 9. ReturnIfAbrupt(targetBuffer). RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); // 10. If IsDetachedBuffer(srcBuffer) is true, throw a TypeError exception. if (IsDetachedBuffer(srcBuffer.GetTaggedValue())) { THROW_TYPE_ERROR_AND_RETURN(thread, "Is Detached Buffer", JSTaggedValue::Exception()); } // 11. Let targetBlock be the value of targetBuffer’s [[ArrayBufferData]] internal slot. JSHandle newArrBuf(thread, taggedBuf); // Perform CopyDataBlockBytes(targetBlock, 0, srcBlock, srcByteOffset, cloneLength). // 7. Let srcBlock be the value of srcBuffer’s [[ArrayBufferData]] internal slot. void *fromBuf = GetDataPointFromBuffer(arrBuf.GetTaggedValue()); void *toBuf = GetDataPointFromBuffer(taggedBuf); if (cloneLen > 0) { JSArrayBuffer::CopyDataPointBytes(toBuf, fromBuf, srcByteOffset, cloneLen); } return taggedBuf; } // 24.1.1.5 // NOLINTNEXTLINE(readability-function-size) JSTaggedValue BuiltinsArrayBuffer::GetValueFromBuffer(JSThread *thread, JSTaggedValue arrBuf, uint32_t byteIndex, DataViewType type, bool littleEndian) { void *pointer = GetDataPointFromBuffer(arrBuf); uint8_t *block = reinterpret_cast(pointer); return GetValueFromBuffer(thread, byteIndex, block, type, littleEndian); } JSTaggedValue BuiltinsArrayBuffer::GetValueFromBuffer(JSThread *thread, uint32_t byteIndex, uint8_t *block, DataViewType type, bool littleEndian) { switch (type) { case DataViewType::UINT8: case DataViewType::UINT8_CLAMPED: { uint8_t res = block[byteIndex]; // NOLINT return GetTaggedInt(res); } case DataViewType::INT8: { uint8_t res = block[byteIndex]; // NOLINT auto int8Res = static_cast(res); return GetTaggedInt(int8Res); } case DataViewType::UINT16: return GetValueFromBufferForInteger(block, byteIndex, littleEndian); case DataViewType::INT16: return GetValueFromBufferForInteger(block, byteIndex, littleEndian); case DataViewType::UINT32: return GetValueFromBufferForInteger(block, byteIndex, littleEndian); case DataViewType::INT32: return GetValueFromBufferForInteger(block, byteIndex, littleEndian); case DataViewType::FLOAT32: return GetValueFromBufferForFloat(block, byteIndex, littleEndian); case DataViewType::FLOAT64: return GetValueFromBufferForFloat(block, byteIndex, littleEndian); case DataViewType::BIGINT64: return GetValueFromBufferForBigInt(thread, block, byteIndex, littleEndian); case DataViewType::BIGUINT64: return GetValueFromBufferForBigInt(thread, block, byteIndex, littleEndian); default: break; } LOG_ECMA(FATAL) << "this branch is unreachable"; UNREACHABLE(); } // 24.1.1.6 JSTaggedValue BuiltinsArrayBuffer::SetValueInBuffer(JSThread *thread, JSTaggedValue arrBuf, uint32_t byteIndex, DataViewType type, const JSHandle &value, bool littleEndian) { if (UNLIKELY(IsBigIntElementType(type))) { JSHandle arrBufHandle(thread, arrBuf); switch (type) { case DataViewType::BIGINT64: SetValueInBufferForBigInt(thread, value, arrBufHandle, byteIndex, littleEndian); RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); break; case DataViewType::BIGUINT64: SetValueInBufferForBigInt(thread, value, arrBufHandle, byteIndex, littleEndian); RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); break; default: LOG_ECMA(FATAL) << "this branch is unreachable"; UNREACHABLE(); } return JSTaggedValue::Undefined(); } void *pointer = GetDataPointFromBuffer(arrBuf); uint8_t *block = reinterpret_cast(pointer); double val = value.GetTaggedValue().GetNumber(); return SetValueInBuffer(thread, byteIndex, block, type, val, littleEndian); } // es12 25.1.2.7 IsBigIntElementType ( type ) bool BuiltinsArrayBuffer::IsBigIntElementType(DataViewType type) { if (type == DataViewType::BIGINT64 || type == DataViewType::BIGUINT64) { return true; } return false; } // es12 25.1.2.6 IsUnclampedIntegerElementType ( type ) bool BuiltinsArrayBuffer::IsUnclampedIntegerElementType(DataViewType type) { switch (type) { case DataViewType::INT8: case DataViewType::INT16: case DataViewType::INT32: case DataViewType::UINT8: case DataViewType::UINT16: case DataViewType::UINT32: return true; default: return false; } } template void BuiltinsArrayBuffer::SetTypeData(uint8_t *block, T value, uint32_t index) { uint32_t sizeCount = sizeof(T); uint8_t *res = reinterpret_cast(&value); for (uint32_t i = 0; i < sizeCount; i++) { *(block + index + i) = *(res + i); // NOLINT } } template T BuiltinsArrayBuffer::LittleEndianToBigEndian(T liValue) { uint8_t sizeCount = sizeof(T); T biValue; switch (sizeCount) { case NumberSize::UINT16: biValue = ((liValue & 0x00FF) << BITS_EIGHT) // NOLINT | ((liValue & 0xFF00) >> BITS_EIGHT); // NOLINT break; case NumberSize::UINT32: biValue = ((liValue & 0x000000FF) << BITS_TWENTY_FOUR) // NOLINT | ((liValue & 0x0000FF00) << BITS_EIGHT) // NOLINT | ((liValue & 0x00FF0000) >> BITS_EIGHT) // NOLINT | ((liValue & 0xFF000000) >> BITS_TWENTY_FOUR); // NOLINT break; default: LOG_ECMA(FATAL) << "this branch is unreachable"; UNREACHABLE(); break; } return biValue; } template T BuiltinsArrayBuffer::LittleEndianToBigEndian64Bit(T liValue) { return ((liValue & 0x00000000000000FF) << BITS_FIFTY_SIX) // NOLINT | ((liValue & 0x000000000000FF00) << BITS_FORTY) // NOLINT | ((liValue & 0x0000000000FF0000) << BITS_TWENTY_FOUR) // NOLINT | ((liValue & 0x00000000FF000000) << BITS_EIGHT) // NOLINT | ((liValue & 0x000000FF00000000) >> BITS_EIGHT) // NOLINT | ((liValue & 0x0000FF0000000000) >> BITS_TWENTY_FOUR) // NOLINT | ((liValue & 0x00FF000000000000) >> BITS_FORTY) // NOLINT | ((liValue & 0xFF00000000000000) >> BITS_FIFTY_SIX); // NOLINT } template JSTaggedValue BuiltinsArrayBuffer::GetValueFromBufferForInteger(uint8_t *block, uint32_t byteIndex, bool littleEndian) { ASSERT_PRINT(std::is_integral_v, "T must be integral"); ASSERT_PRINT(sizeof(T) == size, "Invalid number size"); ASSERT_PRINT(sizeof(T) >= sizeof(uint16_t), "T must have a size more than uint8"); ASSERT(size >= NumberSize::UINT16 || size <= NumberSize::FLOAT64); T res = *reinterpret_cast(block + byteIndex); if (!littleEndian) { res = LittleEndianToBigEndian(res); } // uint32_t maybe overflow with TaggedInt // NOLINTNEXTLINE(readability-braces-around-statements,bugprone-suspicious-semicolon) if constexpr (std::is_same_v) { // NOLINTNEXTLINE(clang-diagnostic-sign-compare) if (res > static_cast(std::numeric_limits::max())) { return GetTaggedDouble(static_cast(res)); } } return GetTaggedInt(res); } template JSTaggedValue BuiltinsArrayBuffer::GetValueFromBufferForFloat(uint8_t *block, uint32_t byteIndex, bool littleEndian) { ASSERT_PRINT((std::is_same_v || std::is_same_v), "T must be correct type"); ASSERT_PRINT(sizeof(T) == size, "Invalid number size"); UnionType unionValue = {0}; // NOLINTNEXTLINE(readability-braces-around-statements) if constexpr (std::is_same_v) { unionValue.uValue = *reinterpret_cast(block + byteIndex); if (std::isnan(unionValue.value)) { if (!JSTaggedValue::IsImpureNaN(unionValue.value)) { return GetTaggedDouble(unionValue.value); } else { return GetTaggedDouble(base::NAN_VALUE); } } if (!littleEndian) { uint32_t res = LittleEndianToBigEndian(unionValue.uValue); return GetTaggedDouble(base::bit_cast(res)); } } else if constexpr (std::is_same_v) { // NOLINTNEXTLINE(readability-braces-around-statements) unionValue.uValue = *reinterpret_cast(block + byteIndex); if (std::isnan(unionValue.value) && !JSTaggedValue::IsImpureNaN(unionValue.value)) { return GetTaggedDouble(unionValue.value); } if (!littleEndian) { uint64_t res = LittleEndianToBigEndian64Bit(unionValue.uValue); T d = base::bit_cast(res); if (JSTaggedValue::IsImpureNaN(d)) { return GetTaggedDouble(base::bit_cast(base::pureNaN)); } return GetTaggedDouble(d); } else { if (JSTaggedValue::IsImpureNaN(unionValue.value)) { return GetTaggedDouble(base::NAN_VALUE); } } } return GetTaggedDouble(unionValue.value); } template JSTaggedValue BuiltinsArrayBuffer::GetValueFromBufferForBigInt(JSThread *thread, uint8_t *block, uint32_t byteIndex, bool littleEndian) { ASSERT_PRINT((std::is_same_v || std::is_same_v), "T must be uint64_t/int64_t"); auto pTmp = *reinterpret_cast(block + byteIndex); if (!littleEndian) { pTmp = LittleEndianToBigEndian64Bit(pTmp); } if constexpr (std::is_same_v) { return BigInt::Uint64ToBigInt(thread, pTmp).GetTaggedValue(); } return BigInt::Int64ToBigInt(thread, pTmp).GetTaggedValue(); } template void BuiltinsArrayBuffer::SetValueInBufferForByte(double val, uint8_t *block, uint32_t byteIndex) { ASSERT_PRINT((std::is_same_v || std::is_same_v), "T must be int8/uint8"); T res; if (std::isnan(val) || std::isinf(val)) { res = 0; SetTypeData(block, res, byteIndex); return; } auto int64Val = static_cast(val); auto *resArr = reinterpret_cast(&int64Val); res = *resArr; SetTypeData(block, res, byteIndex); } void BuiltinsArrayBuffer::SetValueInBufferForUint8Clamped(double val, uint8_t *block, uint32_t byteIndex) { uint8_t res; if (std::isnan(val) || val <= 0) { res = 0; SetTypeData(block, res, byteIndex); return; } val = val >= UINT8_MAX ? UINT8_MAX : val; constexpr double HALF = 0.5; val = val == HALF ? 0 : std::round(val); res = static_cast(val); SetTypeData(block, res, byteIndex); } template void BuiltinsArrayBuffer::SetValueInBufferForInteger(double val, uint8_t *block, uint32_t byteIndex, bool littleEndian) { ASSERT_PRINT(std::is_integral_v, "T must be integral"); ASSERT_PRINT(sizeof(T) >= sizeof(uint16_t), "T must have a size more than uint8"); T res; if (std::isnan(val) || std::isinf(val)) { res = 0; SetTypeData(block, res, byteIndex); return; } auto int64Val = static_cast(val); // NOLINTNEXTLINE(readability-braces-around-statements) if constexpr (std::is_same_v) { auto *pTmp = reinterpret_cast(&int64Val); int16_t tmp = *pTmp; res = static_cast(tmp); } else { // NOLINTNEXTLINE(readability-braces-around-statements) auto *pTmp = reinterpret_cast(&int64Val); res = *pTmp; } if (!littleEndian) { res = LittleEndianToBigEndian(res); } SetTypeData(block, res, byteIndex); } template void BuiltinsArrayBuffer::SetValueInBufferForFloat(double val, uint8_t *block, uint32_t byteIndex, bool littleEndian) { ASSERT_PRINT((std::is_same_v || std::is_same_v), "T must be float type"); auto data = static_cast(val); if (std::isnan(val)) { SetTypeData(block, data, byteIndex); return; } if (!littleEndian) { if constexpr (std::is_same_v) { uint32_t res = base::bit_cast(data); data = base::bit_cast(LittleEndianToBigEndian(res)); } else if constexpr (std::is_same_v) { uint64_t res = base::bit_cast(data); data = base::bit_cast(LittleEndianToBigEndian64Bit(res)); } } SetTypeData(block, data, byteIndex); } template void BuiltinsArrayBuffer::SetValueInBufferForBigInt(JSThread *thread, const JSHandle &val, JSHandle &arrBuf, uint32_t byteIndex, bool littleEndian) { ASSERT_PRINT((std::is_same_v || std::is_same_v), "T must be int64_t/uint64_t"); T value = 0; bool lossless = true; if constexpr(std::is_same_v) { BigInt::BigIntToUint64(thread, val, reinterpret_cast(&value), &lossless); } else { BigInt::BigIntToInt64(thread, val, reinterpret_cast(&value), &lossless); } RETURN_IF_ABRUPT_COMPLETION(thread); if (!littleEndian) { value = LittleEndianToBigEndian64Bit(value); } void *pointer = GetDataPointFromBuffer(arrBuf.GetTaggedValue()); uint8_t *block = reinterpret_cast(pointer); SetTypeData(block, value, byteIndex); } template void BuiltinsArrayBuffer::SetValueInBufferForBigInt(JSThread *thread, double val, uint8_t *block, uint32_t byteIndex, bool littleEndian) { ASSERT_PRINT((std::is_same_v || std::is_same_v), "T must be int64_t/uint64_t"); T value = 0; bool lossless = true; JSHandle valHandle(thread, GetTaggedDouble(val)); if constexpr(std::is_same_v) { BigInt::BigIntToUint64(thread, valHandle, reinterpret_cast(&value), &lossless); } else { BigInt::BigIntToInt64(thread, valHandle, reinterpret_cast(&value), &lossless); } RETURN_IF_ABRUPT_COMPLETION(thread); if (!littleEndian) { value = LittleEndianToBigEndian64Bit(value); } SetTypeData(block, value, byteIndex); } JSTaggedValue BuiltinsArrayBuffer::FastSetValueInBuffer(JSThread *thread, JSTaggedValue arrBuf, uint32_t byteIndex, DataViewType type, double val, bool littleEndian) { void *pointer = GetDataPointFromBuffer(arrBuf); uint8_t *block = reinterpret_cast(pointer); return SetValueInBuffer(thread, byteIndex, block, type, val, littleEndian); } JSTaggedValue BuiltinsArrayBuffer::SetValueInBuffer(JSThread* thread, uint32_t byteIndex, uint8_t *block, DataViewType type, double val, bool littleEndian) { switch (type) { case DataViewType::UINT8: SetValueInBufferForByte(val, block, byteIndex); break; case DataViewType::UINT8_CLAMPED: SetValueInBufferForUint8Clamped(val, block, byteIndex); break; case DataViewType::INT8: SetValueInBufferForByte(val, block, byteIndex); break; case DataViewType::UINT16: SetValueInBufferForInteger(val, block, byteIndex, littleEndian); break; case DataViewType::INT16: SetValueInBufferForInteger(val, block, byteIndex, littleEndian); break; case DataViewType::UINT32: SetValueInBufferForInteger(val, block, byteIndex, littleEndian); break; case DataViewType::INT32: SetValueInBufferForInteger(val, block, byteIndex, littleEndian); break; case DataViewType::FLOAT32: SetValueInBufferForFloat(val, block, byteIndex, littleEndian); break; case DataViewType::FLOAT64: SetValueInBufferForFloat(val, block, byteIndex, littleEndian); break; case DataViewType::BIGINT64: SetValueInBufferForBigInt(thread, val, block, byteIndex, littleEndian); RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); break; case DataViewType::BIGUINT64: SetValueInBufferForBigInt(thread, val, block, byteIndex, littleEndian); RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread); break; default: LOG_ECMA(FATAL) << "this branch is unreachable"; UNREACHABLE(); } return JSTaggedValue::Undefined(); } void *BuiltinsArrayBuffer::GetDataPointFromBuffer(JSTaggedValue arrBuf, uint32_t byteOffset) { if (arrBuf.IsByteArray()) { return reinterpret_cast(ToUintPtr(ByteArray::Cast(arrBuf.GetTaggedObject())->GetData()) + byteOffset); } JSArrayBuffer *arrayBuffer = JSArrayBuffer::Cast(arrBuf.GetTaggedObject()); if (arrayBuffer->GetArrayBufferByteLength() == 0) { return nullptr; } JSTaggedValue data = arrayBuffer->GetArrayBufferData(); return reinterpret_cast(ToUintPtr(JSNativePointer::Cast(data.GetTaggedObject()) ->GetExternalPointer()) + byteOffset); } } // namespace panda::ecmascript::builtins