1 files changed, 78 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/RTUtf16FindAscii.cpp b/src/VBox/Runtime/common/string/RTUtf16FindAscii.cpp
new file mode 100644
index 00000000..4d925c8d
--- /dev/null
+++ b/src/VBox/Runtime/common/string/RTUtf16FindAscii.cpp
@@ -0,0 +1,78 @@
+/* $Id: RTUtf16FindAscii.cpp $ */
+/** @file
+ * IPRT - RTUtf16FindAscii.
+ */
+
+/*
+ * Copyright (C) 2010-2023 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 <iprt/utf16.h>
+#include "internal/iprt.h"
+
+#include <iprt/string.h>
+
+
+RTDECL(ssize_t) RTUtf16FindAscii(PCRTUTF16 pwszString, const char *pszSubStr)
+{
+    if (pwszString)
+    {
+        if (pszSubStr)
+        {
+            const size_t   cchSubStr = strlen(pszSubStr);
+            RTUTF16 const wcFirst   = *pszSubStr;
+            Assert(wcFirst < 0x80);
+            if (wcFirst != 0)
+            {
+                PCRTUTF16 const pwszStart = pwszString;
+                for (;;)
+                {
+                    RTUTF16 wc = *pwszString;
+                    if (wc)
+                    {
+                        if (   wc == wcFirst
+                            && RTUtf16NCmpAscii(pwszString, pszSubStr, cchSubStr) == 0)
+                            return pwszString - pwszStart;
+                        pwszString++;
+                    }
+                    else
+                        break;
+                }
+            }
+        }
+    }
+    return -1;
+}
+RT_EXPORT_SYMBOL(RTUtf16FindAscii);
+