1 files changed, 61 insertions, 0 deletions
diff --git a/src/VBox/HostDrivers/VBoxUSB/USBLib.cpp b/src/VBox/HostDrivers/VBoxUSB/USBLib.cpp
new file mode 100644
index 00000000..a8e41c01
--- /dev/null
+++ b/src/VBox/HostDrivers/VBoxUSB/USBLib.cpp
@@ -0,0 +1,61 @@
+/* $Id: USBLib.cpp $ */
+/** @file
+ * VirtualBox USB Library, Common Bits.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <VBox/usblib.h>
+
+
+/**
+ * Calculate the hash of the serial string.
+ *
+ * 64bit FNV1a, chosen because it is designed to hash in to a power of two
+ * space, and is much quicker and simpler than, say, a half MD4.
+ *
+ * @returns the hash.
+ * @param   pszSerial       The serial string.
+ */
+USBLIB_DECL(uint64_t) USBLibHashSerial(const char *pszSerial)
+{
+    if (!pszSerial)
+        pszSerial = "";
+
+    register const uint8_t *pu8 = (const uint8_t *)pszSerial;
+    register uint64_t u64 = UINT64_C(14695981039346656037);
+    for (;;)
+    {
+        register uint8_t u8 = *pu8;
+        if (!u8)
+            break;
+        u64 = (u64 * UINT64_C(1099511628211)) ^ u8;
+        pu8++;
+    }
+
+    return u64;
+}
+