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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()
- : NativeFunction("Number", *interpreter().global_object().function_prototype())
- {
- 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", interpreter().global_object().get("parseFloat"));
- define_property("prototype", interpreter().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)
- {
- double number = 0;
- if (interpreter.argument_count()) {
- number = interpreter.argument(0).to_double(interpreter);
- if (interpreter.exception())
- return {};
- }
- return NumberObject::create(global_object(), number);
- }
- Value NumberConstructor::is_finite(Interpreter& interpreter)
- {
- return Value(interpreter.argument(0).is_finite_number());
- }
- Value NumberConstructor::is_integer(Interpreter& interpreter)
- {
- return Value(interpreter.argument(0).is_integer());
- }
- Value NumberConstructor::is_nan(Interpreter& interpreter)
- {
- return Value(interpreter.argument(0).is_nan());
- }
- Value NumberConstructor::is_safe_integer(Interpreter& interpreter)
- {
- 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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