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/*
* Copyright (c) 2020, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/NumberConstructor.h>
#include <LibJS/Runtime/NumberObject.h>
#include <math.h>
#ifdef __clang__
# define EPSILON_VALUE pow(2, -52)
# define MAX_SAFE_INTEGER_VALUE pow(2, 53) - 1
# define MIN_SAFE_INTEGER_VALUE -(pow(2, 53) - 1)
#else
constexpr const double EPSILON_VALUE { __builtin_pow(2, -52) };
constexpr const double MAX_SAFE_INTEGER_VALUE { __builtin_pow(2, 53) - 1 };
constexpr const double MIN_SAFE_INTEGER_VALUE { -(__builtin_pow(2, 53) - 1) };
#endif
namespace JS {
NumberConstructor::NumberConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.Number, *global_object.function_prototype())
{
}
void NumberConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.isFinite, is_finite, 1, attr);
define_native_function(vm.names.isInteger, is_integer, 1, attr);
define_native_function(vm.names.isNaN, is_nan, 1, attr);
define_native_function(vm.names.isSafeInteger, is_safe_integer, 1, attr);
define_property(vm.names.parseFloat, global_object.get(vm.names.parseFloat));
define_property(vm.names.prototype, global_object.number_prototype(), 0);
define_property(vm.names.length, Value(1), Attribute::Configurable);
define_property(vm.names.EPSILON, Value(EPSILON_VALUE), 0);
define_property(vm.names.MAX_VALUE, Value(NumericLimits<double>::max()), 0);
define_property(vm.names.MIN_VALUE, Value(NumericLimits<double>::min()), 0);
define_property(vm.names.MAX_SAFE_INTEGER, Value(MAX_SAFE_INTEGER_VALUE), 0);
define_property(vm.names.MIN_SAFE_INTEGER, Value(MIN_SAFE_INTEGER_VALUE), 0);
define_property(vm.names.NEGATIVE_INFINITY, js_negative_infinity(), 0);
define_property(vm.names.POSITIVE_INFINITY, js_infinity(), 0);
define_property(vm.names.NaN, js_nan(), 0);
}
NumberConstructor::~NumberConstructor()
{
}
Value NumberConstructor::call()
{
if (!vm().argument_count())
return Value(0);
return vm().argument(0).to_number(global_object());
}
Value NumberConstructor::construct(Function&)
{
double number = 0;
if (vm().argument_count()) {
number = vm().argument(0).to_double(global_object());
if (vm().exception())
return {};
}
return NumberObject::create(global_object(), number);
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_finite)
{
return Value(vm.argument(0).is_finite_number());
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_integer)
{
return Value(vm.argument(0).is_integer());
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_nan)
{
return Value(vm.argument(0).is_nan());
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_safe_integer)
{
if (!vm.argument(0).is_number())
return Value(false);
auto value = vm.argument(0).as_double();
return Value((int64_t)value == value && value >= MIN_SAFE_INTEGER_VALUE && value <= MAX_SAFE_INTEGER_VALUE);
}
}
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