mirror of
https://github.com/intel/linux-sgx
synced 2026-06-08 14:49:32 +00:00
Zhang Lili
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* $OpenBSD: memmove.c,v 1.2 2015/08/31 02:53:57 guenther Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <string.h>
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/*
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* sizeof(word) MUST BE A POWER OF TWO
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* SO THAT wmask BELOW IS ALL ONES
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*/
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typedef long word; /* "word" used for optimal copy speed */
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#define wsize sizeof(word)
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#define wmask (wsize - 1)
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#ifdef _TLIBC_USE_INTEL_FAST_STRING_
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extern void *_intel_fast_memmove(void *, void *, size_t);
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#else
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extern void *__memmove(void *, void *, size_t);
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#endif
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/*
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* Copy a block of memory, handling overlap.
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*/
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void *
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memmove(void *dst0, const void *src0, size_t length)
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{
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#ifdef _TLIBC_USE_INTEL_FAST_STRING_
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return _intel_fast_memmove(dst0, (void*)src0, length);
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#else
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return __memmove(dst0, src0, length);
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#endif
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}
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