FreeBSD/Linux Kernel Cross Reference
sys/sys/libkern.h
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: releng/7.3/sys/sys/libkern.h 182381 2008-08-28 17:58:01Z obrien $
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. */
48 extern u_char const bcd2bin_data[];
49 extern u_char const bin2bcd_data[];
50 extern 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
56 static __inline int imax(int a, int b) { return (a > b ? a : b); }
57 static __inline int imin(int a, int b) { return (a < b ? a : b); }
58 static __inline long lmax(long a, long b) { return (a > b ? a : b); }
59 static __inline long lmin(long a, long b) { return (a < b ? a : b); }
60 static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
61 static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
62 static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
63 static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
64 static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
65 static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
66 static __inline off_t omax(off_t a, off_t b) { return (a > b ? a : b); }
67 static __inline off_t omin(off_t a, off_t b) { return (a < b ? a : b); }
68
69 static __inline int abs(int a) { return (a < 0 ? -a : a); }
70 static __inline long labs(long a) { return (a < 0 ? -a : a); }
71 static __inline quad_t qabs(quad_t a) { return (a < 0 ? -a : a); }
72
73 /* Prototypes for non-quad routines. */
74 struct malloc_type;
75 uint32_t arc4random(void);
76 void arc4rand(void *ptr, u_int len, int reseed);
77 int bcmp(const void *, const void *, size_t);
78 void *bsearch(const void *, const void *, size_t,
79 size_t, int (*)(const void *, const void *));
80 #ifndef HAVE_INLINE_FFS
81 int ffs(int);
82 #endif
83 #ifndef HAVE_INLINE_FFSL
84 int ffsl(long);
85 #endif
86 #ifndef HAVE_INLINE_FLS
87 int fls(int);
88 #endif
89 #ifndef HAVE_INLINE_FLSL
90 int flsl(long);
91 #endif
92 int fnmatch(const char *, const char *, int);
93 void gets(char *, size_t, int);
94 int locc(int, char *, u_int);
95 void qsort(void *base, size_t nmemb, size_t size,
96 int (*compar)(const void *, const void *));
97 void qsort_r(void *base, size_t nmemb, size_t size, void *thunk,
98 int (*compar)(void *, const void *, const void *));
99 u_long random(void);
100 char *index(const char *, int);
101 char *rindex(const char *, int);
102 int scanc(u_int, const u_char *, const u_char *, int);
103 int skpc(int, int, char *);
104 void srandom(u_long);
105 int strcasecmp(const char *, const char *);
106 char *strcat(char * __restrict, const char * __restrict);
107 int strcmp(const char *, const char *);
108 char *strcpy(char * __restrict, const char * __restrict);
109 char *strdup(const char *__restrict, struct malloc_type *);
110 size_t strlcat(char *, const char *, size_t);
111 size_t strlcpy(char *, const char *, size_t);
112 size_t strlen(const char *);
113 int strncasecmp(const char *, const char *, size_t);
114 int strncmp(const char *, const char *, size_t);
115 char *strncpy(char * __restrict, const char * __restrict, size_t);
116 char *strsep(char **, const char *delim);
117 size_t strspn(const char *, const char *);
118 char *strstr(const char *, const char *);
119 int strvalid(const char *, size_t);
120
121 extern uint32_t crc32_tab[];
122
123 static __inline uint32_t
124 crc32_raw(const void *buf, size_t size, uint32_t crc)
125 {
126 const uint8_t *p = (const uint8_t *)buf;
127
128 while (size--)
129 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
130 return (crc);
131 }
132
133 static __inline uint32_t
134 crc32(const void *buf, size_t size)
135 {
136 uint32_t crc;
137
138 crc = crc32_raw(buf, size, ~0U);
139 return (crc ^ ~0U);
140 }
141
142 static __inline int
143 memcmp(const void *b1, const void *b2, size_t len)
144 {
145 return (bcmp(b1, b2, len));
146 }
147
148 LIBKERN_INLINE void *memset(void *, int, size_t);
149 #ifdef LIBKERN_BODY
150 LIBKERN_INLINE void *
151 memset(void *b, int c, size_t len)
152 {
153 char *bb;
154
155 if (c == 0)
156 bzero(b, len);
157 else
158 for (bb = (char *)b; len--; )
159 *bb++ = c;
160 return (b);
161 }
162 #endif
163
164 static __inline char *
165 strchr(const char *p, int ch)
166 {
167 return (index(p, ch));
168 }
169
170 static __inline char *
171 strrchr(const char *p, int ch)
172 {
173 return (rindex(p, ch));
174 }
175
176 /* fnmatch() return values. */
177 #define FNM_NOMATCH 1 /* Match failed. */
178
179 /* fnmatch() flags. */
180 #define FNM_NOESCAPE 0x01 /* Disable backslash escaping. */
181 #define FNM_PATHNAME 0x02 /* Slash must be matched by slash. */
182 #define FNM_PERIOD 0x04 /* Period must be matched by period. */
183 #define FNM_LEADING_DIR 0x08 /* Ignore /<tail> after Imatch. */
184 #define FNM_CASEFOLD 0x10 /* Case insensitive search. */
185 #define FNM_IGNORECASE FNM_CASEFOLD
186 #define FNM_FILE_NAME FNM_PATHNAME
187
188 #endif /* !_SYS_LIBKERN_H_ */
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