1 files changed, 72 insertions, 0 deletions
diff --git a/src/VBox/Runtime/nt/RTNtPathFindPossible8dot3Name.cpp b/src/VBox/Runtime/nt/RTNtPathFindPossible8dot3Name.cpp
new file mode 100644
index 00000000..0096a050
--- /dev/null
+++ b/src/VBox/Runtime/nt/RTNtPathFindPossible8dot3Name.cpp
@@ -0,0 +1,72 @@
+/* $Id: RTNtPathFindPossible8dot3Name.cpp $ */
+/** @file
+ * IPRT - Native NT, RTNtPathFindPossible8dot3Name.
+ */
+
+/*
+ * Copyright (C) 2006-2020 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                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_FS
+#ifdef IN_SUP_HARDENED_R3
+# include <iprt/nt/nt-and-windows.h>
+#else
+# include <iprt/nt/nt.h>
+#endif
+
+
+
+/**
+ * Checks whether the path could be containing alternative 8.3 names generated
+ * by NTFS, FAT, or other similar file systems.
+ *
+ * @returns Pointer to the first component that might be an 8.3 name, NULL if
+ *          not 8.3 path.
+ * @param   pwszPath        The path to check.
+ *
+ * @remarks This is making bad ASSUMPTION wrt to the naming scheme of 8.3 names,
+ *          however, non-tilde 8.3 aliases are probably rare enough to not be
+ *          worth all the extra code necessary to open each path component and
+ *          check if we've got the short name or not.
+ */
+RTDECL(PRTUTF16) RTNtPathFindPossible8dot3Name(PCRTUTF16 pwszPath)
+{
+    PCRTUTF16 pwszName = pwszPath;
+    for (;;)
+    {
+        RTUTF16 wc = *pwszPath++;
+        if (wc == '~')
+        {
+            /* Could check more here before jumping to conclusions... */
+            if (pwszPath - pwszName <= 8+1+3)
+                return (PRTUTF16)pwszName;
+        }
+        else if (wc == '\\' || wc == '/' || wc == ':')
+            pwszName = pwszPath;
+        else if (wc == 0)
+            break;
+    }
+    return NULL;
+}
+