/* * Copyright (c) 2020, Andreas Kling * Copyright (c) 2020, Linus Groh * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include namespace JS { static void initialize_typed_array_from_array_buffer(GlobalObject& global_object, TypedArrayBase& typed_array, ArrayBuffer& array_buffer, Value byte_offset, Value length) { // 22.2.5.1.3 InitializeTypedArrayFromArrayBuffer, https://tc39.es/ecma262/#sec-initializetypedarrayfromarraybuffer auto& vm = global_object.vm(); auto element_size = typed_array.element_size(); auto offset = byte_offset.to_index(global_object); if (vm.exception()) return; if (offset % element_size != 0) { vm.throw_exception(global_object, ErrorType::TypedArrayInvalidByteOffset, typed_array.class_name(), element_size, offset); return; } size_t new_length { 0 }; if (!length.is_undefined()) { new_length = length.to_index(global_object); if (vm.exception()) return; } // FIXME: 8. If IsDetachedBuffer(buffer) is true, throw a TypeError exception. auto buffer_byte_length = array_buffer.byte_length(); size_t new_byte_length; if (length.is_undefined()) { if (buffer_byte_length % element_size != 0) { vm.throw_exception(global_object, ErrorType::TypedArrayInvalidBufferLength, typed_array.class_name(), element_size, buffer_byte_length); return; } if (offset > buffer_byte_length) { vm.throw_exception(global_object, ErrorType::TypedArrayOutOfRangeByteOffset, offset, buffer_byte_length); return; } new_byte_length = buffer_byte_length - offset; } else { new_byte_length = new_length * element_size; if (offset + new_byte_length > buffer_byte_length) { vm.throw_exception(global_object, ErrorType::TypedArrayOutOfRangeByteOffsetOrLength, offset, offset + new_byte_length, buffer_byte_length); return; } } typed_array.set_viewed_array_buffer(&array_buffer); typed_array.set_byte_length(new_byte_length); typed_array.set_byte_offset(offset); typed_array.set_array_length(new_byte_length / element_size); } void TypedArrayBase::visit_edges(Visitor& visitor) { Object::visit_edges(visitor); visitor.visit(m_viewed_array_buffer); } #define JS_DEFINE_TYPED_ARRAY(ClassName, snake_name, PrototypeName, ConstructorName, Type) \ ClassName* ClassName::create(GlobalObject& global_object, u32 length) \ { \ return global_object.heap().allocate(global_object, length, *global_object.snake_name##_prototype()); \ } \ \ ClassName::ClassName(u32 length, Object& prototype) \ : TypedArray(length, prototype) \ { \ } \ ClassName::~ClassName() { } \ \ PrototypeName::PrototypeName(GlobalObject& global_object) \ : Object(*global_object.typed_array_prototype()) \ { \ } \ PrototypeName::~PrototypeName() { } \ \ ConstructorName::ConstructorName(GlobalObject& global_object) \ : TypedArrayConstructor(vm().names.ClassName, *global_object.typed_array_constructor()) \ { \ } \ ConstructorName::~ConstructorName() { } \ void ConstructorName::initialize(GlobalObject& global_object) \ { \ auto& vm = this->vm(); \ NativeFunction::initialize(global_object); \ define_property(vm.names.prototype, global_object.snake_name##_prototype(), 0); \ define_property(vm.names.length, Value(1), Attribute::Configurable); \ define_property(vm.names.BYTES_PER_ELEMENT, Value((i32)sizeof(Type)), 0); \ } \ Value ConstructorName::call() \ { \ auto& vm = this->vm(); \ vm.throw_exception(global_object(), ErrorType::ConstructorWithoutNew, vm.names.ClassName); \ return {}; \ } \ Value ConstructorName::construct(Function&) \ { \ auto& vm = this->vm(); \ if (vm.argument_count() == 0) \ return ClassName::create(global_object(), 0); \ \ auto first_argument = vm.argument(0); \ if (first_argument.is_object()) { \ auto* typed_array = ClassName::create(global_object(), 0); \ if (first_argument.as_object().is_typed_array()) { \ /* FIXME: Initialize from TypedArray */ \ TODO(); \ } else if (is(first_argument.as_object())) { \ auto& array_buffer = static_cast(first_argument.as_object()); \ initialize_typed_array_from_array_buffer(global_object(), *typed_array, array_buffer, vm.argument(1), vm.argument(2)); \ if (vm.exception()) \ return {}; \ } else { \ /* FIXME: Initialize from Iterator or Array-like object */ \ TODO(); \ } \ return typed_array; \ } \ \ auto array_length = first_argument.to_index(global_object()); \ if (vm.exception()) { \ /* Re-throw more specific RangeError */ \ vm.clear_exception(); \ vm.throw_exception(global_object(), ErrorType::InvalidLength, "typed array"); \ return {}; \ } \ return ClassName::create(global_object(), array_length); \ } #undef __JS_ENUMERATE #define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \ JS_DEFINE_TYPED_ARRAY(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType); JS_ENUMERATE_TYPED_ARRAYS #undef __JS_ENUMERATE }