l3.c

unix v7是最后一个广泛发布的研究型UNIX版本

/*
 * Convert longs to and from 3-byte disk addresses
 */
ltol3(cp, lp, n)
char	*cp;
long	*lp;
int	n;
{
	register i;
	register char *a, *b;

	a = cp;
	b = (char *)lp;
	for(i=0;i<n;i++) {
#ifdef interdata
		b++;
		*a++ = *b++;
		*a++ = *b++;
		*a++ = *b++;
#else
		*a++ = *b++;
		b++;
		*a++ = *b++;
		*a++ = *b++;
#endif
	}
}

l3tol(lp, cp, n)
long	*lp;
char	*cp;
int	n;
{
	register i;
	register char *a, *b;

	a = (char *)lp;
	b = cp;
	for(i=0;i<n;i++) {
#ifdef interdata
		*a++ = 0;
		*a++ = *b++;
		*a++ = *b++;
		*a++ = *b++;
#else
		*a++ = *b++;
		*a++ = 0;
		*a++ = *b++;
		*a++ = *b++;
#endif
	}
}