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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
commit | f8fe689a81f906d1b91bb3220acde2a4ecb14c5b (patch) | |
tree | 26484e9d7e2c67806c2d1760196ff01aaa858e8c /src/VBox/Runtime/common/string/memcpy.cpp | |
parent | Initial commit. (diff) | |
download | virtualbox-f8fe689a81f906d1b91bb3220acde2a4ecb14c5b.tar.xz virtualbox-f8fe689a81f906d1b91bb3220acde2a4ecb14c5b.zip |
Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream
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.cpp | 80 |
1 files changed, 80 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..eea33b58 --- /dev/null +++ b/src/VBox/Runtime/common/string/memcpy.cpp @@ -0,0 +1,80 @@ +/* $Id: memcpy.cpp $ */ +/** @file + * IPRT - CRT Strings, memcpy(). + */ + +/* + * Copyright (C) 2006-2019 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> + + +/** + * 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 _MSC_VER +# if _MSC_VER >= 1400 +_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 +#else +void *memcpy(void *pvDst, const void *pvSrc, size_t cb) +#endif +{ + register union + { + uint8_t *pu8; + uint32_t *pu32; + void *pv; + } uTrg; + uTrg.pv = pvDst; + + register union + { + uint8_t const *pu8; + uint32_t const *pu32; + void const *pv; + } uSrc; + uSrc.pv = pvSrc; + + /* 32-bit word moves. */ + register 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; +} + |