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93feb7a81f
Uint8ClampedArray itself only cares about legitimate in-bounds accesses since that's what where the specialization happens.
86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Function.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Uint8ClampedArray.h>
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#include <string.h>
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namespace JS {
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Uint8ClampedArray* Uint8ClampedArray::create(GlobalObject& global_object, u32 length)
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{
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return global_object.heap().allocate<Uint8ClampedArray>(global_object, length, *global_object.array_prototype());
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}
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Uint8ClampedArray::Uint8ClampedArray(u32 length, Object& prototype)
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: Object(prototype)
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, m_length(length)
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{
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auto& vm = this->vm();
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define_native_property(vm.names.length, length_getter, nullptr);
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m_data = (u8*)calloc(m_length, 1);
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}
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Uint8ClampedArray::~Uint8ClampedArray()
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{
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ASSERT(m_data);
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free(m_data);
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m_data = nullptr;
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}
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JS_DEFINE_NATIVE_GETTER(Uint8ClampedArray::length_getter)
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{
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auto* this_object = vm.this_value(global_object).to_object(global_object);
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if (!this_object)
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return {};
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if (StringView(this_object->class_name()) != "Uint8ClampedArray") {
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vm.throw_exception<TypeError>(global_object, ErrorType::NotA, "Uint8ClampedArray");
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return {};
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}
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return Value(static_cast<const Uint8ClampedArray*>(this_object)->length());
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}
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bool Uint8ClampedArray::put_by_index(u32 property_index, Value value)
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{
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if (property_index >= m_length)
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return Base::put_by_index(property_index, value);
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auto number = value.to_i32(global_object());
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if (vm().exception())
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return {};
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m_data[property_index] = clamp(number, 0, 255);
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return true;
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}
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Value Uint8ClampedArray::get_by_index(u32 property_index) const
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{
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if (property_index >= m_length)
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return Base::get_by_index(property_index);
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return Value((i32)m_data[property_index]);
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}
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}
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