46 lines
842 B
C
46 lines
842 B
C
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/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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void*
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memmove(void *a1, const void *a2, size_t n)
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{
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char *s1;
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const char *s2;
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if((int32_t)n < 0)
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abort();
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s1 = a1;
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s2 = a2;
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if((s2 < s1) && (s2+n > s1))
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goto back;
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while(n > 0) {
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*s1++ = *s2++;
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n--;
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}
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return a1;
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back:
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s1 += n;
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s2 += n;
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while(n > 0) {
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*--s1 = *--s2;
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n--;
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}
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return a1;
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}
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void*
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memcpy(void *a1, const void *a2, size_t n)
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{
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return memmove(a1, a2, n);
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}
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