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memmove.c
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C/C++ Source or Header
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1990-05-29
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946b
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44 lines
/*
* memmove.c --
*
* Just like memcpy, but memmove is guaranteed to work even if
* the regions overlap.
*
* Copyright (c) 1985 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific written prior permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header$";
#endif
#include <string.h>
char *
memmove(t, f, n)
register char *t, *f;
register int n;
{
register char *p = t;
if (t <= f) {
while (--n >= 0) {
*t++ = *f++;
}
} else {
t += n;
f += n;
while (--n >= 0) {
*--t = *--f;
}
}
return (p);
}