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/*
* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
* 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 <LibJS/Interpreter.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/NumberConstructor.h>
#include <LibJS/Runtime/NumberObject.h>
#include <math.h>
#define EPSILON pow(2, -52)
#define MAX_SAFE_INTEGER pow(2, 53) - 1
#define MIN_SAFE_INTEGER -(pow(2, 53) - 1)
namespace JS {
NumberConstructor::NumberConstructor(GlobalObject& global_object)
: NativeFunction("Number", *global_object.function_prototype())
{
}
void NumberConstructor::initialize(GlobalObject& global_object)
{
NativeFunction::initialize(global_object);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function("isFinite", is_finite, 1, attr);
define_native_function("isInteger", is_integer, 1, attr);
define_native_function("isNaN", is_nan, 1, attr);
define_native_function("isSafeInteger", is_safe_integer, 1, attr);
define_property("parseFloat", global_object.get("parseFloat"));
define_property("prototype", global_object.number_prototype(), 0);
define_property("length", Value(1), Attribute::Configurable);
define_property("EPSILON", Value(EPSILON), 0);
define_property("MAX_SAFE_INTEGER", Value(MAX_SAFE_INTEGER), 0);
define_property("MIN_SAFE_INTEGER", Value(MIN_SAFE_INTEGER), 0);
define_property("NEGATIVE_INFINITY", js_negative_infinity(), 0);
define_property("POSITIVE_INFINITY", js_infinity(), 0);
define_property("NaN", js_nan(), 0);
}
NumberConstructor::~NumberConstructor()
{
}
Value NumberConstructor::call(Interpreter& interpreter)
{
if (!interpreter.argument_count())
return Value(0);
return interpreter.argument(0).to_number(interpreter);
}
Value NumberConstructor::construct(Interpreter& interpreter, Function&)
{
double number = 0;
if (interpreter.argument_count()) {
number = interpreter.argument(0).to_double(interpreter);
if (interpreter.exception())
return {};
}
return NumberObject::create(global_object(), number);
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_finite)
{
return Value(interpreter.argument(0).is_finite_number());
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_integer)
{
return Value(interpreter.argument(0).is_integer());
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_nan)
{
return Value(interpreter.argument(0).is_nan());
}
JS_DEFINE_NATIVE_FUNCTION(NumberConstructor::is_safe_integer)
{
if (!interpreter.argument(0).is_number())
return Value(false);
auto value = interpreter.argument(0).as_double();
return Value((int64_t)value == value && value >= MIN_SAFE_INTEGER && value <= MAX_SAFE_INTEGER);
}
}
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