Linux needs %edx to be 0 on entry. It registers it as an atexit function if
[dragonfly.git] / sys / sys / libkern.h
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1/*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)libkern.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/sys/libkern.h,v 1.20.2.2 2001/09/30 21:12:54 luigi Exp $
1de703da 35 * $DragonFly: src/sys/sys/libkern.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
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36 */
37
38#ifndef _SYS_LIBKERN_H_
39#define _SYS_LIBKERN_H_
40
41#include <sys/cdefs.h>
42#include <sys/types.h>
43#ifdef _KERNEL
44#include <sys/systm.h>
45#endif
46
47/* BCD conversions. */
48extern u_char const bcd2bin_data[];
49extern u_char const bin2bcd_data[];
50extern char const hex2ascii_data[];
51
52#define bcd2bin(bcd) (bcd2bin_data[bcd])
53#define bin2bcd(bin) (bin2bcd_data[bin])
54#define hex2ascii(hex) (hex2ascii_data[hex])
55
56static __inline int imax(int a, int b) { return (a > b ? a : b); }
57static __inline int imin(int a, int b) { return (a < b ? a : b); }
58static __inline long lmax(long a, long b) { return (a > b ? a : b); }
59static __inline long lmin(long a, long b) { return (a < b ? a : b); }
60static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
61static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
62static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
63static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
64static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
65static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
66
67/* Prototypes for non-quad routines. */
68u_int32_t arc4random __P((void));
69int bcmp __P((const void *, const void *, size_t));
70#ifndef HAVE_INLINE_FFS
71int ffs __P((int));
72#endif
73#ifndef HAVE_INLINE_FLS
74int fls __P((int));
75#endif
76int locc __P((int, char *, u_int));
77void qsort __P((void *base, size_t nmemb, size_t size,
78 int (*compar)(const void *, const void *)));
79u_long random __P((void));
80char *index __P((const char *, int));
81char *rindex __P((const char *, int));
82int scanc __P((u_int, const u_char *, const u_char *, int));
83int skpc __P((int, int, char *));
84void srandom __P((u_long));
85char *strcat __P((char *, const char *));
86int strcmp __P((const char *, const char *));
87char *strcpy __P((char *, const char *));
88size_t strlen __P((const char *));
89int strncmp __P((const char *, const char *, size_t));
90char *strncpy __P((char *, const char *, size_t));
91
92
93static __inline int
94memcmp(const void *b1, const void *b2, size_t len)
95{
96 return (bcmp(b1, b2, len));
97}
98
99static __inline void *
100memset(void *b, int c, size_t len)
101{
102 char *bb;
103
104 if (c == 0)
105 bzero(b, len);
106 else
107 for (bb = (char *)b; len--; )
108 *bb++ = c;
109 return (b);
110}
111
112#endif /* !_SYS_LIBKERN_H_ */