1 files changed, 59 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/memrchr.cpp b/src/VBox/Runtime/common/string/memrchr.cpp
new file mode 100644
index 00000000..5a0538f2
--- /dev/null
+++ b/src/VBox/Runtime/common/string/memrchr.cpp
@@ -0,0 +1,59 @@
+/* $Id: memrchr.cpp $ */
+/** @file
+ * IPRT - CRT Strings, memrchr().
+ */
+
+/*
+ * Copyright (C) 2018-2020 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                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/string.h>
+
+
+/**
+ * Search for a given byte starting at the end of the block.
+ *
+ * @returns Pointer on a match or NULL otherwise.
+ * @param   pb      Pointer to the block.
+ * @param   ch      The char to search for.
+ * @param   cb      The size of the block.
+ */
+void *memrchr(const char *pb, int ch, size_t cb)
+{
+    if (cb)
+    {
+        const char *pbCur = pb + cb - 1;
+
+        while (cb)
+        {
+            if (*pbCur == ch)
+                return (void *)pbCur;
+            pbCur--;
+            cb--;
+        }
+    }
+
+    return NULL;
+}
+