diff options
Diffstat (limited to 'src/qml/jsruntime/qv4arraybuffer.cpp')
-rw-r--r-- | src/qml/jsruntime/qv4arraybuffer.cpp | 133 |
1 files changed, 44 insertions, 89 deletions
diff --git a/src/qml/jsruntime/qv4arraybuffer.cpp b/src/qml/jsruntime/qv4arraybuffer.cpp index a99ec16943..a49bd32d66 100644 --- a/src/qml/jsruntime/qv4arraybuffer.cpp +++ b/src/qml/jsruntime/qv4arraybuffer.cpp @@ -1,46 +1,8 @@ -/**************************************************************************** -** -** Copyright (C) 2018 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtQml module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2018 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #include "qv4arraybuffer_p.h" #include "qv4typedarray_p.h" #include "qv4dataview_p.h" -#include "qv4string_p.h" -#include "qv4jscall_p.h" #include "qv4symbol_p.h" using namespace QV4; @@ -50,14 +12,14 @@ DEFINE_OBJECT_VTABLE(ArrayBufferCtor); DEFINE_OBJECT_VTABLE(SharedArrayBuffer); DEFINE_OBJECT_VTABLE(ArrayBuffer); -void Heap::SharedArrayBufferCtor::init(QV4::ExecutionContext *scope) +void Heap::SharedArrayBufferCtor::init(QV4::ExecutionEngine *engine) { - Heap::FunctionObject::init(scope, QStringLiteral("SharedArrayBuffer")); + Heap::FunctionObject::init(engine, QStringLiteral("SharedArrayBuffer")); } -void Heap::ArrayBufferCtor::init(QV4::ExecutionContext *scope) +void Heap::ArrayBufferCtor::init(QV4::ExecutionEngine *engine) { - Heap::FunctionObject::init(scope, QStringLiteral("ArrayBuffer")); + Heap::FunctionObject::init(engine, QStringLiteral("ArrayBuffer")); } ReturnedValue SharedArrayBufferCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget) @@ -66,14 +28,15 @@ ReturnedValue SharedArrayBufferCtor::virtualCallAsConstructor(const FunctionObje if (newTarget->isUndefined()) return scope.engine->throwTypeError(); - qint64 len = argc ? argv[0].toIndex() : 0; - if (scope.engine->hasException) + const double len = argc ? argv[0].toInteger() : 0; + if (scope.hasException()) return Encode::undefined(); - if (len < 0 || len >= INT_MAX) + if (len < 0 || len >= std::numeric_limits<int>::max()) return scope.engine->throwRangeError(QStringLiteral("SharedArrayBuffer: Invalid length.")); - Scoped<SharedArrayBuffer> a(scope, scope.engine->memoryManager->allocate<SharedArrayBuffer>(len)); - if (scope.engine->hasException) + Scoped<SharedArrayBuffer> a( + scope, scope.engine->memoryManager->allocate<SharedArrayBuffer>(size_t(len))); + if (scope.hasException()) return Encode::undefined(); return a->asReturnedValue(); @@ -105,7 +68,7 @@ ReturnedValue ArrayBufferCtor::virtualCallAsConstructor(const FunctionObject *f, if (o) a->setPrototypeOf(o); } - if (scope.engine->hasException) + if (scope.hasException()) return Encode::undefined(); return a->asReturnedValue(); @@ -127,13 +90,18 @@ ReturnedValue ArrayBufferCtor::method_isView(const FunctionObject *, const Value void Heap::SharedArrayBuffer::init(size_t length) { Object::init(); + QPair<QTypedArrayData<char> *, char *> pair; if (length < UINT_MAX) - data = QTypedArrayData<char>::allocate(length + 1); - if (!data) { + pair = QTypedArrayData<char>::allocate(length + 1); + if (!pair.first) { + new (&arrayDataPointerStorage) QArrayDataPointer<char>(); internalClass->engine->throwRangeError(QStringLiteral("ArrayBuffer: out of memory")); return; } - data->size = int(length); + auto data = new (&arrayDataPointerStorage) QArrayDataPointer<char>{ + pair.first, pair.second, qsizetype(length) }; + + // can't use appendInitialize() because we want to set the terminating '\0' memset(data->data(), 0, length + 1); isShared = true; } @@ -141,41 +109,24 @@ void Heap::SharedArrayBuffer::init(size_t length) void Heap::SharedArrayBuffer::init(const QByteArray& array) { Object::init(); - data = const_cast<QByteArray&>(array).data_ptr(); - data->ref.ref(); + new (&arrayDataPointerStorage) QArrayDataPointer<char>(*const_cast<QByteArray &>(array).data_ptr()); isShared = true; } void Heap::SharedArrayBuffer::destroy() { - if (data && !data->ref.deref()) - QTypedArrayData<char>::deallocate(data); + arrayDataPointer().~QArrayDataPointer(); Object::destroy(); } QByteArray ArrayBuffer::asByteArray() const { - QByteArrayDataPtr ba = { d()->data }; - ba.ptr->ref.ref(); - return QByteArray(ba); + return QByteArray(constArrayData(), arrayDataLength()); } -void ArrayBuffer::detach() { - if (!d()->data->ref.isShared()) - return; - - QTypedArrayData<char> *oldData = d()->data; - - d()->data = QTypedArrayData<char>::allocate(oldData->size + 1); - if (!d()->data) { - engine()->throwRangeError(QStringLiteral("ArrayBuffer: out of memory")); - return; - } - - memcpy(d()->data->data(), oldData->data(), oldData->size + 1); - - if (!oldData->ref.deref()) - QTypedArrayData<char>::deallocate(oldData); +void ArrayBuffer::detach() +{ + detachArrayData(); } @@ -197,10 +148,10 @@ void SharedArrayBufferPrototype::init(ExecutionEngine *engine, Object *ctor) ReturnedValue SharedArrayBufferPrototype::method_get_byteLength(const FunctionObject *b, const Value *thisObject, const Value *, int) { const SharedArrayBuffer *a = thisObject->as<SharedArrayBuffer>(); - if (!a || a->isDetachedBuffer() || !a->isSharedArrayBuffer()) + if (!a || a->hasDetachedArrayData() || !a->isSharedArrayBuffer()) return b->engine()->throwTypeError(); - return Encode(a->d()->data->size); + return Encode(a->arrayDataLength()); } ReturnedValue SharedArrayBufferPrototype::method_slice(const FunctionObject *b, const Value *thisObject, const Value *argv, int argc) @@ -212,17 +163,18 @@ ReturnedValue SharedArrayBufferPrototype::slice(const FunctionObject *b, const V { Scope scope(b); const SharedArrayBuffer *a = thisObject->as<SharedArrayBuffer>(); - if (!a || a->isDetachedBuffer() || (a->isSharedArrayBuffer() != shared)) + if (!a || a->hasDetachedArrayData() || (a->isSharedArrayBuffer() != shared)) return scope.engine->throwTypeError(); + const uint aDataLength = a->arrayDataLength(); + double start = argc > 0 ? argv[0].toInteger() : 0; - double end = (argc < 2 || argv[1].isUndefined()) ? - a->d()->data->size : argv[1].toInteger(); + double end = (argc < 2 || argv[1].isUndefined()) ? aDataLength : argv[1].toInteger(); if (scope.hasException()) return QV4::Encode::undefined(); - double first = (start < 0) ? qMax(a->d()->data->size + start, 0.) : qMin(start, (double)a->d()->data->size); - double final = (end < 0) ? qMax(a->d()->data->size + end, 0.) : qMin(end, (double)a->d()->data->size); + double first = (start < 0) ? qMax(aDataLength + start, 0.) : qMin(start, double(aDataLength)); + double final = (end < 0) ? qMax(aDataLength + end, 0.) : qMin(end, double(aDataLength)); const FunctionObject *constructor = a->speciesConstructor(scope, shared ? scope.engine->sharedArrayBufferCtor() : scope.engine->arrayBufferCtor()); if (!constructor) @@ -231,13 +183,13 @@ ReturnedValue SharedArrayBufferPrototype::slice(const FunctionObject *b, const V double newLen = qMax(final - first, 0.); ScopedValue argument(scope, QV4::Encode(newLen)); QV4::Scoped<SharedArrayBuffer> newBuffer(scope, constructor->callAsConstructor(argument, 1)); - if (!newBuffer || newBuffer->d()->data->size < (int)newLen || - newBuffer->isDetachedBuffer() || (newBuffer->isSharedArrayBuffer() != shared) || + if (!newBuffer || newBuffer->arrayDataLength() < newLen || + newBuffer->hasDetachedArrayData() || (newBuffer->isSharedArrayBuffer() != shared) || newBuffer->sameValue(*a) || - a->isDetachedBuffer()) + a->hasDetachedArrayData()) return scope.engine->throwTypeError(); - memcpy(newBuffer->d()->data->data(), a->d()->data->data() + (uint)first, newLen); + memcpy(newBuffer->arrayData(), a->constArrayData() + (uint)first, newLen); return newBuffer->asReturnedValue(); } @@ -262,10 +214,13 @@ void ArrayBufferPrototype::init(ExecutionEngine *engine, Object *ctor) ReturnedValue ArrayBufferPrototype::method_get_byteLength(const FunctionObject *f, const Value *thisObject, const Value *, int) { const ArrayBuffer *a = thisObject->as<ArrayBuffer>(); - if (!a || a->isDetachedBuffer() || a->isSharedArrayBuffer()) + if (!a || a->isSharedArrayBuffer()) return f->engine()->throwTypeError(); - return Encode(a->d()->data->size); + if (a->hasDetachedArrayData()) + return Encode(0); + + return Encode(a->arrayDataLength()); } ReturnedValue ArrayBufferPrototype::method_slice(const FunctionObject *b, const Value *thisObject, const Value *argv, int argc) |