libkern.h revision 270892 
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)libkern.h	8.1 (Berkeley) 6/10/93
30 * $FreeBSD: stable/10/sys/sys/libkern.h 270892 2014-08-31 21:18:23Z trasz $
31 */
32
33#ifndef _SYS_LIBKERN_H_
34#define	_SYS_LIBKERN_H_
35
36#include <sys/cdefs.h>
37#include <sys/types.h>
38#ifdef _KERNEL
39#include <sys/systm.h>
40#endif
41
42#ifndef	LIBKERN_INLINE
43#define	LIBKERN_INLINE  static __inline
44#define	LIBKERN_BODY
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); }
66static __inline off_t omax(off_t a, off_t b) { return (a > b ? a : b); }
67static __inline off_t omin(off_t a, off_t b) { return (a < b ? a : b); }
68
69static __inline int abs(int a) { return (a < 0 ? -a : a); }
70static __inline long labs(long a) { return (a < 0 ? -a : a); }
71static __inline quad_t qabs(quad_t a) { return (a < 0 ? -a : a); }
72
73#define	ARC4_ENTR_NONE	0	/* Don't have entropy yet. */
74#define	ARC4_ENTR_HAVE	1	/* Have entropy. */
75#define	ARC4_ENTR_SEED	2	/* Reseeding. */
76extern int arc4rand_iniseed_state;
77
78/* Prototypes for non-quad routines. */
79struct malloc_type;
80uint32_t arc4random(void);
81void	 arc4rand(void *ptr, u_int len, int reseed);
82int	 bcmp(const void *, const void *, size_t);
83void	*bsearch(const void *, const void *, size_t,
84	    size_t, int (*)(const void *, const void *));
85#ifndef	HAVE_INLINE_FFS
86int	 ffs(int);
87#endif
88#ifndef	HAVE_INLINE_FFSL
89int	 ffsl(long);
90#endif
91#ifndef	HAVE_INLINE_FLS
92int	 fls(int);
93#endif
94#ifndef	HAVE_INLINE_FLSL
95int	 flsl(long);
96#endif
97#ifndef	HAVE_INLINE_FLSLL
98int	 flsll(long long);
99#endif
100
101int	 fnmatch(const char *, const char *, int);
102int	 locc(int, char *, u_int);
103void	*memchr(const void *s, int c, size_t n);
104void	*memcchr(const void *s, int c, size_t n);
105int	 memcmp(const void *b1, const void *b2, size_t len);
106void	 qsort(void *base, size_t nmemb, size_t size,
107	    int (*compar)(const void *, const void *));
108void	 qsort_r(void *base, size_t nmemb, size_t size, void *thunk,
109	    int (*compar)(void *, const void *, const void *));
110u_long	 random(void);
111int	 scanc(u_int, const u_char *, const u_char *, int);
112void	 srandom(u_long);
113int	 strcasecmp(const char *, const char *);
114char	*strcat(char * __restrict, const char * __restrict);
115char	*strchr(const char *, int);
116int	 strcmp(const char *, const char *);
117char	*strcpy(char * __restrict, const char * __restrict);
118size_t	 strcspn(const char * __restrict, const char * __restrict) __pure;
119char	*strdup(const char *__restrict, struct malloc_type *);
120char	*strndup(const char *__restrict, size_t, struct malloc_type *);
121size_t	 strlcat(char *, const char *, size_t);
122size_t	 strlcpy(char *, const char *, size_t);
123size_t	 strlen(const char *);
124int	 strncasecmp(const char *, const char *, size_t);
125int	 strncmp(const char *, const char *, size_t);
126char	*strncpy(char * __restrict, const char * __restrict, size_t);
127size_t	 strnlen(const char *, size_t);
128char	*strrchr(const char *, int);
129char	*strsep(char **, const char *delim);
130size_t	 strspn(const char *, const char *);
131char	*strstr(const char *, const char *);
132int	 strvalid(const char *, size_t);
133
134extern const uint32_t crc32_tab[];
135
136static __inline uint32_t
137crc32_raw(const void *buf, size_t size, uint32_t crc)
138{
139	const uint8_t *p = (const uint8_t *)buf;
140
141	while (size--)
142		crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
143	return (crc);
144}
145
146static __inline uint32_t
147crc32(const void *buf, size_t size)
148{
149	uint32_t crc;
150
151	crc = crc32_raw(buf, size, ~0U);
152	return (crc ^ ~0U);
153}
154
155uint32_t
156calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
157    unsigned int length);
158
159
160LIBKERN_INLINE void *memset(void *, int, size_t);
161#ifdef LIBKERN_BODY
162LIBKERN_INLINE void *
163memset(void *b, int c, size_t len)
164{
165	char *bb;
166
167	if (c == 0)
168		bzero(b, len);
169	else
170		for (bb = (char *)b; len--; )
171			*bb++ = c;
172	return (b);
173}
174#endif
175
176static __inline char *
177index(const char *p, int ch)
178{
179
180	return (strchr(p, ch));
181}
182
183static __inline char *
184rindex(const char *p, int ch)
185{
186
187	return (strrchr(p, ch));
188}
189
190/* fnmatch() return values. */
191#define	FNM_NOMATCH	1	/* Match failed. */
192
193/* fnmatch() flags. */
194#define	FNM_NOESCAPE	0x01	/* Disable backslash escaping. */
195#define	FNM_PATHNAME	0x02	/* Slash must be matched by slash. */
196#define	FNM_PERIOD	0x04	/* Period must be matched by period. */
197#define	FNM_LEADING_DIR	0x08	/* Ignore /<tail> after Imatch. */
198#define	FNM_CASEFOLD	0x10	/* Case insensitive search. */
199#define	FNM_IGNORECASE	FNM_CASEFOLD
200#define	FNM_FILE_NAME	FNM_PATHNAME
201
202#endif /* !_SYS_LIBKERN_H_ */
203