From 9575ded8da83b6d8774b36316c388279fa0512cc Mon Sep 17 00:00:00 2001
From: Niko Lehto <nikle@cendio.se>
Date: Tue, 28 Jan 2020 17:00:04 +0100
Subject: [PATCH] Add util for unsigned and signed int. conversion

Will be used in later commit in extended clipboard handling.
---
 core/util/int.js  | 15 +++++++++++++++
 tests/test.int.js | 16 ++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 core/util/int.js
 create mode 100644 tests/test.int.js

diff --git a/core/util/int.js b/core/util/int.js
new file mode 100644
index 00000000..001f40f2
--- /dev/null
+++ b/core/util/int.js
@@ -0,0 +1,15 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2020 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+export function toUnsigned32bit(toConvert) {
+    return toConvert >>> 0;
+}
+
+export function toSigned32bit(toConvert) {
+    return toConvert | 0;
+}
diff --git a/tests/test.int.js b/tests/test.int.js
new file mode 100644
index 00000000..954fd279
--- /dev/null
+++ b/tests/test.int.js
@@ -0,0 +1,16 @@
+/* eslint-disable no-console */
+const expect = chai.expect;
+
+import { toUnsigned32bit, toSigned32bit } from '../core/util/int.js';
+
+describe('Integer casting', function () {
+    it('should cast unsigned to signed', function () {
+        let expected = 4294967286;
+        expect(toUnsigned32bit(-10)).to.equal(expected);
+    });
+
+    it('should cast signed to unsigned', function () {
+        let expected = -10;
+        expect(toSigned32bit(4294967286)).to.equal(expected);
+    });
+});