30 lines
529 B
C
30 lines
529 B
C
/*
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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(void *s1, const void *s2, register size_t n)
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{
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register char *p1 = s1;
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register const char *p2 = s2;
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if (p2 <= p1 && p2 + (n-1) >= p1) {
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/* overlap, copy backwards */
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p1 += n;
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p2 += n;
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while (n > 0) {
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n--;
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*--p1 = *--p2;
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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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*p1++ = *p2++;
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}
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return s1;
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}
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