From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:17:27 +0200
Subject: Adding upstream version 7.0.14-dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/VBox/Runtime/common/string/memcmp.cpp | 97 +++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 src/VBox/Runtime/common/string/memcmp.cpp

(limited to 'src/VBox/Runtime/common/string/memcmp.cpp')

diff --git a/src/VBox/Runtime/common/string/memcmp.cpp b/src/VBox/Runtime/common/string/memcmp.cpp
new file mode 100644
index 00000000..f54e2623
--- /dev/null
+++ b/src/VBox/Runtime/common/string/memcmp.cpp
@@ -0,0 +1,97 @@
+/* $Id: memcmp.cpp $ */
+/** @file
+ * IPRT - CRT Strings, memcmp().
+ */
+
+/*
+ * 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>
+
+
+/**
+ * Copies a memory.
+ *
+ * @returns 0 if pvDst and pvSrc are equal
+ * @returns <0 if pvDst is 'smaller' than pvSrc.
+ * @returns >0 if pvDst is 'larger' than pvSrc.
+ *
+ * @param   pvDst       Pointer to the target block.
+ * @param   pvSrc       Pointer to the source block.
+ * @param   cb          The size of the block.
+ */
+#ifdef IPRT_NO_CRT
+# undef memcmp
+int RT_NOCRT(memcmp)(const void *pvDst, const void *pvSrc, size_t cb)
+#elif RT_MSC_PREREQ(RT_MSC_VER_VS2005)
+__checkReturn int __cdecl
+memcmp(__in_bcount_opt(_Size) const void *pvDst, __in_bcount_opt(_Size) const void *pvSrc, __in size_t cb)
+#else
+int memcmp(const void *pvDst, const void *pvSrc, size_t cb)
+#endif
+{
+    union
+    {
+        uint8_t const  *pu8;
+        uint32_t const *pu32;
+        void const     *pv;
+    } uDst, uSrc;
+    uDst.pv = pvDst;
+    uSrc.pv = pvSrc;
+
+    /* 32-bit word compare. */
+    size_t c = cb >> 2;
+    while (c-- > 0)
+    {
+        /* ASSUMES int is at least 32-bit! */
+        int32_t iDiff = *uDst.pu32++ - *uSrc.pu32++;
+        if (iDiff)
+            return iDiff;
+    }
+
+    /* Remaining byte moves. */
+    c = cb & 3;
+    while (c-- > 0)
+    {
+        int8_t iDiff = *uDst.pu8++ - *uSrc.pu8++;
+        if (iDiff)
+            return iDiff;
+    }
+
+    return 0;
+}
+RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(memcmp);
+
-- 
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