usr/src/sys/kern/subr_xxx.c

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)subr_xxx.c	7.7 (Berkeley) %G%
 */

#include "errno.h"

/*
 * Routine placed in illegal entries in the bdevsw and cdevsw tables.
 */
nodev()
{

	return (ENODEV);
}

/*
 * Null routine; placed in insignificant entries
 * in the bdevsw and cdevsw tables.
 */
nulldev()
{

	return (0);
}

/*
 * Definitions of various trivial functions;
 * usually expanded inline rather than being defined here.
 */
#if !defined(vax) && !defined(tahoe)
imin(a, b)
{

	return (a < b ? a : b);
}

imax(a, b)
{

	return (a > b ? a : b);
}

unsigned
min(a, b)
	unsigned a, b;
{

	return (a < b ? a : b);
}

unsigned
max(a, b)
	unsigned a, b;
{

	return (a > b ? a : b);
}
#endif

#if !defined(vax) && !defined(tahoe) && !defined(hp300)
ffs(mask)
	register long mask;
{
	register int bit;

	if (!mask)
		return(0);
	for (bit = 1;; ++bit)
		if (mask&0x01)
			return(bit);
		mask >>= 1;
	}
}
#endif

#if !defined(vax) && !defined(hp300)
bcmp(s1, s2, len)
	register char *s1, *s2;
	register unsigned len;
{

	while (len--)
		if (*s1++ != *s2++)
			return (1);
	return (0);
}

strlen(s1)
	register char *s1;
{
	register int len;

	for (len = 0; *s1++ != '\0'; len++)
		/* void */;
	return (len);
}
#endif
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1982, 1986 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
	6	* @(#)subr_xxx.c 7.7 (Berkeley) %G%
	7	*/
	8
	9	#include "errno.h"
	10
	11	/*
	12	* Routine placed in illegal entries in the bdevsw and cdevsw tables.
	13	*/
	14	nodev()
	15	{
	16
	17	return (ENODEV);
	18	}
	19
	20	/*
	21	* Null routine; placed in insignificant entries
	22	* in the bdevsw and cdevsw tables.
	23	*/
	24	nulldev()
	25	{
	26
	27	return (0);
	28	}
	29
	30	/*
	31	* Definitions of various trivial functions;
	32	* usually expanded inline rather than being defined here.
	33	*/
	34	#if !defined(vax) && !defined(tahoe)
	35	imin(a, b)
	36	{
	37
	38	return (a < b ? a : b);
	39	}
	40
	41	imax(a, b)
	42	{
	43
	44	return (a > b ? a : b);
	45	}
	46
	47	unsigned
	48	min(a, b)
	49	unsigned a, b;
	50	{
	51
	52	return (a < b ? a : b);
	53	}
	54
	55	unsigned
	56	max(a, b)
	57	unsigned a, b;
	58	{
	59
	60	return (a > b ? a : b);
	61	}
	62	#endif
	63
	64	#if !defined(vax) && !defined(tahoe) && !defined(hp300)
	65	ffs(mask)
	66	register long mask;
	67	{
	68	register int bit;
	69
	70	if (!mask)
	71	return(0);
	72	for (bit = 1;; ++bit)
	73	if (mask&0x01)
	74	return(bit);
	75	mask >>= 1;
	76	}
	77	}
	78	#endif
	79
	80	#if !defined(vax) && !defined(hp300)
	81	bcmp(s1, s2, len)
	82	register char s1, s2;
	83	register unsigned len;
	84	{
	85
	86	while (len--)
	87	if (s1++ != s2++)
	88	return (1);
	89	return (0);
	90	}
	91
	92	strlen(s1)
	93	register char *s1;
	94	{
	95	register int len;
	96
	97	for (len = 0; *s1++ != '\0'; len++)
	98	/* void */;
	99	return (len);
	100	}
	101	#endif