29 lines
509 B
C
29 lines
509 B
C
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Header$ */
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#include <string.h>
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void *
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memmove(register void *s1, register const void *s2, register size_t n)
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{
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void *ret = s1;
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if (s2 <= s1 && s2 + (n-1) >= s1) {
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/* overlap, copy backwards */
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s1 += n;
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s2 += n;
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while (n > 0) {
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n--;
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*--s1 = *--s2;
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}
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} else
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while (n > 0) {
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n--;
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*s1++ = *s2++;
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}
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return ret;
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}
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