Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Runtime/BigInt.cpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2020-2022, Linus Groh <linusg@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibCrypto/BigInt/SignedBigInteger.h>
+#include <LibJS/Heap/Heap.h>
+#include <LibJS/Runtime/BigInt.h>
+#include <LibJS/Runtime/GlobalObject.h>
+
+namespace JS {
+
+JS_DEFINE_ALLOCATOR(BigInt);
+
+NonnullGCPtr<BigInt> BigInt::create(VM& vm, Crypto::SignedBigInteger big_integer)
+{
+    return vm.heap().allocate_without_realm<BigInt>(move(big_integer));
+}
+
+BigInt::BigInt(Crypto::SignedBigInteger big_integer)
+    : m_big_integer(move(big_integer))
+{
+    VERIFY(!m_big_integer.is_invalid());
+}
+
+ErrorOr<String> BigInt::to_string() const
+{
+    return String::formatted("{}n", TRY(m_big_integer.to_base(10)));
+}
+
+// 21.2.1.1.1 NumberToBigInt ( number ), https://tc39.es/ecma262/#sec-numbertobigint
+ThrowCompletionOr<BigInt*> number_to_bigint(VM& vm, Value number)
+{
+    VERIFY(number.is_number());
+
+    // 1. If IsIntegralNumber(number) is false, throw a RangeError exception.
+    if (!number.is_integral_number())
+        return vm.throw_completion<RangeError>(ErrorType::BigIntFromNonIntegral);
+
+    // 2. Return the BigInt value that represents ℝ(number).
+    return BigInt::create(vm, Crypto::SignedBigInteger { number.as_double() }).ptr();
+}
+
+}