1 files changed, 80 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/path/rtPathVolumeSpecLen.cpp b/src/VBox/Runtime/common/path/rtPathVolumeSpecLen.cpp
new file mode 100644
index 00000000..b0a65b63
--- /dev/null
+++ b/src/VBox/Runtime/common/path/rtPathVolumeSpecLen.cpp
@@ -0,0 +1,80 @@
+/* $Id: rtPathVolumeSpecLen.cpp $ */
+/** @file
+ * IPRT - rtPathVolumeSpecLen
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "internal/iprt.h"
+#include <iprt/string.h>
+#include <iprt/ctype.h>
+#include "internal/path.h"
+
+
+
+/**
+ * Returns the length of the volume name specifier of the given path.
+ * If no such specifier zero is returned.
+ */
+DECLHIDDEN(size_t) rtPathVolumeSpecLen(const char *pszPath)
+{
+#if defined (RT_OS_OS2) || defined (RT_OS_WINDOWS)
+    if (pszPath && *pszPath)
+    {
+        /* UNC path. */
+        /** @todo r=bird: it's UNC and we have to check that the next char isn't a
+         *        slash, then skip both the server and the share name. */
+        if (    (pszPath[0] == '\\' || pszPath[0] == '/')
+            &&  (pszPath[1] == '\\' || pszPath[1] == '/'))
+            return strcspn(pszPath + 2, "\\/") + 2;
+
+        /* Drive letter. */
+        if (    pszPath[1] == ':'
+            &&  RT_C_IS_ALPHA(pszPath[0]))
+            return 2;
+    }
+    return 0;
+
+#else
+    /* This isn't quite right when looking at the above stuff, but it works assuming that '//' does not mean UNC. */
+    /// @todo (dmik) well, it's better to consider there's no volume name
+    //  at all on *nix systems
+    NOREF(pszPath);
+    return 0;
+//    return pszPath && pszPath[0] == '/';
+#endif
+}
+