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- /*
- * Copyright (c) 1982, 1986, 1991 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)subr_xxx.c 7.10 (Berkeley) 4/20/91
- */
-
- /*
- * Miscellaneous trivial functions, including many
- * that are often inline-expanded or done in assembler.
- */
- #include "param.h"
- #include "systm.h"
- #include "machine/cpu.h"
-
- /*
- * Unsupported device function (e.g. writing to read-only device).
- */
- enodev()
- {
-
- return (ENODEV);
- }
-
- /*
- * Unconfigured device function; driver not configured.
- */
- enxio()
- {
-
- return (ENXIO);
- }
-
- /*
- * Unsupported ioctl function.
- */
- enoioctl()
- {
-
- return (ENOTTY);
- }
-
- /*
- * Unsupported system function.
- * This is used for an otherwise-reasonable operation
- * that is not supported by the current system binary.
- */
- enosys()
- {
-
- return (ENOSYS);
- }
-
- /*
- * Return error for operation not supported
- * on a specific object or file type.
- */
- eopnotsupp()
- {
-
- return (EOPNOTSUPP);
- }
-
- /*
- * Generic null operation, always returns success.
- */
- nullop()
- {
-
- return (0);
- }
-
- /*
- * Definitions of various trivial functions;
- * usually expanded inline rather than being defined here.
- */
- #ifdef NEED_MINMAX
- imin(a, b)
- int a, b;
- {
-
- return (a < b ? a : b);
- }
-
- imax(a, b)
- int a, b;
- {
-
- return (a > b ? a : b);
- }
-
- unsigned int
- min(a, b)
- unsigned int a, b;
- {
-
- return (a < b ? a : b);
- }
-
- unsigned int
- max(a, b)
- unsigned int a, b;
- {
-
- return (a > b ? a : b);
- }
-
- long
- lmin(a, b)
- long a, b;
- {
-
- return (a < b ? a : b);
- }
-
- long
- lmax(a, b)
- long a, b;
- {
-
- return (a > b ? a : b);
- }
-
- unsigned long
- ulmin(a, b)
- unsigned long a, b;
- {
-
- return (a < b ? a : b);
- }
-
- unsigned long
- ulmax(a, b)
- unsigned long a, b;
- {
-
- return (a > b ? a : b);
- }
- #endif /* NEED_MINMAX */
-
- #ifdef NEED_FFS
- ffs(mask)
- register long mask;
- {
- register int bit;
-
- if (!mask)
- return(0);
- for (bit = 1;; ++bit) {
- if (mask&0x01)
- return(bit);
- mask >>= 1;
- }
- }
- #endif /* NEED_FFS */
-
- #ifdef NEED_BCMP
- bcmp(v1, v2, len)
- void *v1, *v2;
- register unsigned len;
- {
- register u_char *s1 = v1, *s2 = v2;
-
- while (len--)
- if (*s1++ != *s2++)
- return (1);
- return (0);
- }
- #endif /* NEED_BCMP */
-
- #ifdef NEED_STRLEN
- strlen(s1)
- register char *s1;
- {
- register int len;
-
- for (len = 0; *s1++ != '\0'; len++)
- ;
- return (len);
- }
- #endif /* NEED_STRLEN */
-