232 lines
4.1 KiB
C
232 lines
4.1 KiB
C
/*
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* Copyright (c) 1982, 1986, 1991 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)subr_xxx.c 7.10 (Berkeley) 4/20/91
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* $Id: subr_xxx.c,v 1.5 1993/06/27 06:01:54 andrew Exp $
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*/
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/*
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* Miscellaneous trivial functions, including many
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* that are often inline-expanded or done in assembler.
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*/
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#include "param.h"
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#include "systm.h"
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#include "machine/cpu.h"
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/*
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* Unsupported device function (e.g. writing to read-only device).
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*/
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int
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enodev()
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{
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return (ENODEV);
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}
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/*
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* Unconfigured device function; driver not configured.
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*/
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int
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enxio()
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{
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return (ENXIO);
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}
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/*
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* Unsupported ioctl function.
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*/
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int
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enoioctl()
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{
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return (ENOTTY);
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}
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/*
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* Unsupported system function.
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* This is used for an otherwise-reasonable operation
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* that is not supported by the current system binary.
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*/
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int
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enosys()
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{
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return (ENOSYS);
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}
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/*
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* Return error for operation not supported
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* on a specific object or file type.
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*/
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int
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eopnotsupp()
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{
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return (EOPNOTSUPP);
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}
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/*
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* Generic null operation, always returns success.
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*/
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int
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nullop()
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{
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return (0);
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}
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/*
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* Generic null operation, returning void.
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*/
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void
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voidop()
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{
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}
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/*
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* Definitions of various trivial functions;
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* usually expanded inline rather than being defined here.
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*/
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#ifdef NEED_MINMAX
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int
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imin(a, b)
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int a, b;
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{
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return (a < b ? a : b);
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}
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int
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imax(a, b)
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int a, b;
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{
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return (a > b ? a : b);
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}
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unsigned int
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min(a, b)
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unsigned int a, b;
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{
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return (a < b ? a : b);
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}
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unsigned int
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max(a, b)
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unsigned int a, b;
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{
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return (a > b ? a : b);
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}
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long
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lmin(a, b)
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long a, b;
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{
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return (a < b ? a : b);
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}
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long
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lmax(a, b)
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long a, b;
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{
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return (a > b ? a : b);
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}
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unsigned long
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ulmin(a, b)
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unsigned long a, b;
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{
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return (a < b ? a : b);
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}
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unsigned long
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ulmax(a, b)
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unsigned long a, b;
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{
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return (a > b ? a : b);
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}
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#endif /* NEED_MINMAX */
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#ifdef NEED_FFS
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int
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ffs(mask)
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register long mask;
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{
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register int bit;
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if (!mask)
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return(0);
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for (bit = 1;; ++bit) {
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if (mask&0x01)
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return(bit);
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mask >>= 1;
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}
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return 0;
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}
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#endif /* NEED_FFS */
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#ifdef NEED_BCMP
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int
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bcmp(v1, v2, len)
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void *v1, *v2;
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register unsigned len;
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{
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register u_char *s1 = v1, *s2 = v2;
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while (len--)
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if (*s1++ != *s2++)
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return (1);
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return (0);
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}
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#endif /* NEED_BCMP */
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#ifdef NEED_STRLEN
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size_t
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strlen(s1)
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register const char *s1;
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{
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register size_t len;
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for (len = 0; *s1++ != '\0'; len++)
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;
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return (len);
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}
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#endif /* NEED_STRLEN */
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