1 files changed, 115 insertions, 0 deletions
diff --git a/Userland/Libraries/LibJS/Runtime/NumberConstructor.cpp b/Userland/Libraries/LibJS/Runtime/NumberConstructor.cpp
new file mode 100644
index 0000000000..c95441166e
--- /dev/null
+++ b/Userland/Libraries/LibJS/Runtime/NumberConstructor.cpp
@@ -0,0 +1,115 @@
+/*
+ * 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/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_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);
+}
+
+}