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23 lines (20 sloc) 0.318 kB
/* public domain rewrite of memcmp(3) */
void *
memmove (d, s, n)
void *d, *s;
int n;
{
char *dst = d;
char *src = s;
void *ret = dst;
if (src < dst) {
src += n;
dst += n;
while (n--)
*--dst = *--src;
}
else if (dst < src)
while (n--)
*dst++ = *src++;
return ret;
}
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