--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/windows/native/libjsound/PLATFORM_API_WinOS_Charset_Util.cpp	Tue Aug 01 14:18:14 2017 +0800
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "PLATFORM_API_WinOS_Charset_Util.h"
+
+#include <cstring>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+LPSTR UnicodeToUTF8(const LPCWSTR lpUnicodeStr)
+{
+    DWORD dwUTF8Len = WideCharToMultiByte(CP_UTF8, 0, lpUnicodeStr, -1, nullptr, 0, nullptr, nullptr);
+    LPSTR lpUTF8Str = new CHAR[dwUTF8Len];
+    memset(lpUTF8Str, 0, sizeof(CHAR) * (dwUTF8Len));
+    WideCharToMultiByte(CP_UTF8, 0, lpUnicodeStr, -1, lpUTF8Str, dwUTF8Len, nullptr, nullptr);
+    return lpUTF8Str;
+}
+
+void UnicodeToUTF8AndCopy(LPSTR dest, LPCWSTR src, SIZE_T maxLength) {
+    LPSTR utf8EncodedName = UnicodeToUTF8(src);
+    strncpy(dest, utf8EncodedName, maxLength - 1);
+    delete[] utf8EncodedName;
+    dest[maxLength - 1] = '\0';
+}
+
+#ifdef __cplusplus
+}
+#endif