1 files changed, 86 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/memset.cpp b/src/VBox/Runtime/common/string/memset.cpp
new file mode 100644
index 00000000..2b94843a
--- /dev/null
+++ b/src/VBox/Runtime/common/string/memset.cpp
@@ -0,0 +1,86 @@
+/* $Id: memset.cpp $ */
+/** @file
+ * IPRT - CRT Strings, memset().
+ */
+
+/*
+ * Copyright (C) 2006-2023 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 "internal/iprt.h"
+#include <iprt/string.h>
+
+
+/**
+ * Fill a memory block with specific byte.
+ *
+ * @returns pvDst.
+ * @param   pvDst      Pointer to the block.
+ * @param   ch      The filler char.
+ * @param   cb      The size of the block.
+ */
+#undef memset
+#ifdef _MSC_VER
+# if _MSC_VER >= 1400
+void *  __cdecl RT_NOCRT(memset)(__out_bcount_full_opt(_Size) void *pvDst, __in int ch, __in size_t cb)
+# else
+void *RT_NOCRT(memset)(void *pvDst, int ch, size_t cb)
+# endif
+#else
+void *RT_NOCRT(memset)(void *pvDst, int ch, size_t cb)
+#endif
+{
+    union
+    {
+        uint8_t  *pu8;
+        uint32_t *pu32;
+        void     *pvDst;
+    } u;
+    u.pvDst = pvDst;
+
+    /* 32-bit word moves. */
+    uint32_t u32 = ch | (ch << 8);
+    u32 |= u32 << 16;
+    size_t c = cb >> 2;
+    while (c-- > 0)
+        *u.pu32++ = u32;
+
+    /* Remaining byte moves. */
+    c = cb & 3;
+    while (c-- > 0)
+        *u.pu8++ = (uint8_t)u32;
+
+    return pvDst;
+}
+RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(memset);