summaryrefslogtreecommitdiffstats
path: root/src/VBox/Runtime/common/string/memcpy.cpp
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Runtime/common/string/memcpy.cpp
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/common/string/memcpy.cpp')
-rw-r--r--src/VBox/Runtime/common/string/memcpy.cpp92
1 files changed, 92 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/memcpy.cpp b/src/VBox/Runtime/common/string/memcpy.cpp
new file mode 100644
index 00000000..e587db5f
--- /dev/null
+++ b/src/VBox/Runtime/common/string/memcpy.cpp
@@ -0,0 +1,92 @@
+/* $Id: memcpy.cpp $ */
+/** @file
+ * IPRT - CRT Strings, memcpy().
+ */
+
+/*
+ * 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 pvDst.
+ * @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 memcpy
+void *RT_NOCRT(memcpy)(void *pvDst, const void *pvSrc, size_t cb)
+#elif RT_MSC_PREREQ(RT_MSC_VER_VS2005)
+_CRT_INSECURE_DEPRECATE_MEMORY(memcpy_s) void * __cdecl
+memcpy(__out_bcount_full_opt(_Size) void *pvDst, __in_bcount_opt(_Size) const void *pvSrc, __in size_t cb)
+#else
+void *memcpy(void *pvDst, const void *pvSrc, size_t cb)
+#endif
+{
+ union
+ {
+ uint8_t *pu8;
+ uint32_t *pu32;
+ void *pv;
+ } uTrg;
+ uTrg.pv = pvDst;
+
+ union
+ {
+ uint8_t const *pu8;
+ uint32_t const *pu32;
+ void const *pv;
+ } uSrc;
+ uSrc.pv = pvSrc;
+
+ /* 32-bit word moves. */
+ size_t c = cb >> 2;
+ while (c-- > 0)
+ *uTrg.pu32++ = *uSrc.pu32++;
+
+ /* Remaining byte moves. */
+ c = cb & 3;
+ while (c-- > 0)
+ *uTrg.pu8++ = *uSrc.pu8++;
+
+ return pvDst;
+}
+RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(memcpy);
+