mirror of
https://github.com/RGBCube/serenity
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115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
/*
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* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
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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 <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/NumberConstructor.h>
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#include <LibJS/Runtime/NumberObject.h>
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#include <math.h>
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#ifdef __clang__
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# define EPSILON_VALUE pow(2, -52)
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# define MAX_SAFE_INTEGER_VALUE pow(2, 53) - 1
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# define MIN_SAFE_INTEGER_VALUE -(pow(2, 53) - 1)
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#else
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constexpr const double EPSILON_VALUE { __builtin_pow(2, -52) };
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constexpr const double MAX_SAFE_INTEGER_VALUE { __builtin_pow(2, 53) - 1 };
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constexpr const double MIN_SAFE_INTEGER_VALUE { -(__builtin_pow(2, 53) - 1) };
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#endif
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namespace JS {
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NumberConstructor::NumberConstructor(GlobalObject& global_object)
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: NativeFunction(vm().names.Number, *global_object.function_prototype())
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{
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}
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void NumberConstructor::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(global_object);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.isFinite, is_finite, 1, attr);
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define_native_function(vm.names.isInteger, is_integer, 1, attr);
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define_native_function(vm.names.isNaN, is_nan, 1, attr);
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define_native_function(vm.names.isSafeInteger, is_safe_integer, 1, attr);
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define_property(vm.names.parseFloat, global_object.get(vm.names.parseFloat));
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define_property(vm.names.prototype, global_object.number_prototype(), 0);
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define_property(vm.names.length, Value(1), Attribute::Configurable);
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define_property(vm.names.EPSILON, Value(EPSILON_VALUE), 0);
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define_property(vm.names.MAX_SAFE_INTEGER, Value(MAX_SAFE_INTEGER_VALUE), 0);
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define_property(vm.names.MIN_SAFE_INTEGER, Value(MIN_SAFE_INTEGER_VALUE), 0);
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define_property(vm.names.NEGATIVE_INFINITY, js_negative_infinity(), 0);
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define_property(vm.names.POSITIVE_INFINITY, js_infinity(), 0);
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define_property(vm.names.NaN, js_nan(), 0);
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}
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NumberConstructor::~NumberConstructor()
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{
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}
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Value NumberConstructor::call()
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{
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if (!vm().argument_count())
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return Value(0);
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return vm().argument(0).to_number(global_object());
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}
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Value NumberConstructor::construct(Function&)
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{
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double number = 0;
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if (vm().argument_count()) {
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number = vm().argument(0).to_double(global_object());
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if (vm().exception())
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return {};
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}
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return NumberObject::create(global_object(), number);
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}
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JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_finite)
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{
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return Value(vm.argument(0).is_finite_number());
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}
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JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_integer)
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{
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return Value(vm.argument(0).is_integer());
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}
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JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_nan)
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{
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return Value(vm.argument(0).is_nan());
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}
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JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_safe_integer)
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{
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if (!vm.argument(0).is_number())
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return Value(false);
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auto value = vm.argument(0).as_double();
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return Value((int64_t)value == value && value >= MIN_SAFE_INTEGER_VALUE && value <= MAX_SAFE_INTEGER_VALUE);
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}
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}
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