check return value from socket call

[unix-history] / usr / src / lib / libc / string / ffs.c

/*
 * Copyright (c) 1987 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)ffs.c	5.2 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

/*
 * ffs -- vax ffs instruction
 */
ffs(mask)
	register long mask;
{
	register int cnt;

	if (mask == 0)
		return(0);
	for (cnt = 1; !(mask & 1); cnt++)
		mask >>= 1;
	return(cnt);
}