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 306536 2016-09-30 22:40:58Z jkim $
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
imax(int a,int b)56 static __inline int imax(int a, int b) { return (a > b ? a : b); }
imin(int a,int b)57 static __inline int imin(int a, int b) { return (a < b ? a : b); }
lmax(long a,long b)58 static __inline long lmax(long a, long b) { return (a > b ? a : b); }
lmin(long a,long b)59 static __inline long lmin(long a, long b) { return (a < b ? a : b); }
max(u_int a,u_int b)60 static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
min(u_int a,u_int b)61 static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
qmax(quad_t a,quad_t b)62 static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
qmin(quad_t a,quad_t b)63 static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
ulmax(u_long a,u_long b)64 static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
ulmin(u_long a,u_long b)65 static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
omax(off_t a,off_t b)66 static __inline off_t omax(off_t a, off_t b) { return (a > b ? a : b); }
omin(off_t a,off_t b)67 static __inline off_t omin(off_t a, off_t b) { return (a < b ? a : b); }
68
abs(int a)69 static __inline int abs(int a) { return (a < 0 ? -a : a); }
labs(long a)70 static __inline long labs(long a) { return (a < 0 ? -a : a); }
qabs(quad_t a)71 static __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. */
76 extern int arc4rand_iniseed_state;
77
78 /* Prototypes for non-quad routines. */
79 struct malloc_type;
80 uint32_t arc4random(void);
81 void arc4rand(void *ptr, u_int len, int reseed);
82 int bcmp(const void *, const void *, size_t);
83 void *bsearch(const void *, const void *, size_t,
84 size_t, int (*)(const void *, const void *));
85 #ifndef HAVE_INLINE_FFS
86 int ffs(int);
87 #endif
88 #ifndef HAVE_INLINE_FFSL
89 int ffsl(long);
90 #endif
91 #ifndef HAVE_INLINE_FLS
92 int fls(int);
93 #endif
94 #ifndef HAVE_INLINE_FLSL
95 int flsl(long);
96 #endif
97 #ifndef HAVE_INLINE_FLSLL
98 int flsll(long long);
99 #endif
100 #define bitcount64(x) __bitcount64((uint64_t)(x))
101 #define bitcount32(x) __bitcount32((uint32_t)(x))
102 #define bitcount16(x) __bitcount16((uint16_t)(x))
103 #define bitcountl(x) __bitcountl((u_long)(x))
104 #define bitcount(x) __bitcount((u_int)(x))
105
106 int fnmatch(const char *, const char *, int);
107 int locc(int, char *, u_int);
108 void *memchr(const void *s, int c, size_t n);
109 void *memcchr(const void *s, int c, size_t n);
110 int memcmp(const void *b1, const void *b2, size_t len);
111 void qsort(void *base, size_t nmemb, size_t size,
112 int (*compar)(const void *, const void *));
113 void qsort_r(void *base, size_t nmemb, size_t size, void *thunk,
114 int (*compar)(void *, const void *, const void *));
115 u_long random(void);
116 int scanc(u_int, const u_char *, const u_char *, int);
117 void srandom(u_long);
118 int strcasecmp(const char *, const char *);
119 char *strcat(char * __restrict, const char * __restrict);
120 char *strchr(const char *, int);
121 int strcmp(const char *, const char *);
122 char *strcpy(char * __restrict, const char * __restrict);
123 size_t strcspn(const char * __restrict, const char * __restrict) __pure;
124 char *strdup(const char *__restrict, struct malloc_type *);
125 char *strncat(char *, const char *, size_t);
126 char *strndup(const char *__restrict, size_t, struct malloc_type *);
127 size_t strlcat(char *, const char *, size_t);
128 size_t strlcpy(char *, const char *, size_t);
129 size_t strlen(const char *);
130 int strncasecmp(const char *, const char *, size_t);
131 int strncmp(const char *, const char *, size_t);
132 char *strncpy(char * __restrict, const char * __restrict, size_t);
133 size_t strnlen(const char *, size_t);
134 char *strrchr(const char *, int);
135 char *strsep(char **, const char *delim);
136 size_t strspn(const char *, const char *);
137 char *strstr(const char *, const char *);
138 int strvalid(const char *, size_t);
139
140 extern const uint32_t crc32_tab[];
141
142 static __inline uint32_t
crc32_raw(const void * buf,size_t size,uint32_t crc)143 crc32_raw(const void *buf, size_t size, uint32_t crc)
144 {
145 const uint8_t *p = (const uint8_t *)buf;
146
147 while (size--)
148 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
149 return (crc);
150 }
151
152 static __inline uint32_t
crc32(const void * buf,size_t size)153 crc32(const void *buf, size_t size)
154 {
155 uint32_t crc;
156
157 crc = crc32_raw(buf, size, ~0U);
158 return (crc ^ ~0U);
159 }
160
161 uint32_t
162 calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
163 unsigned int length);
164
165
166 LIBKERN_INLINE void *memset(void *, int, size_t);
167 #ifdef LIBKERN_BODY
168 LIBKERN_INLINE void *
memset(void * b,int c,size_t len)169 memset(void *b, int c, size_t len)
170 {
171 char *bb;
172
173 if (c == 0)
174 bzero(b, len);
175 else
176 for (bb = (char *)b; len--; )
177 *bb++ = c;
178 return (b);
179 }
180 #endif
181
182 static __inline char *
index(const char * p,int ch)183 index(const char *p, int ch)
184 {
185
186 return (strchr(p, ch));
187 }
188
189 static __inline char *
rindex(const char * p,int ch)190 rindex(const char *p, int ch)
191 {
192
193 return (strrchr(p, ch));
194 }
195
196 /* fnmatch() return values. */
197 #define FNM_NOMATCH 1 /* Match failed. */
198
199 /* fnmatch() flags. */
200 #define FNM_NOESCAPE 0x01 /* Disable backslash escaping. */
201 #define FNM_PATHNAME 0x02 /* Slash must be matched by slash. */
202 #define FNM_PERIOD 0x04 /* Period must be matched by period. */
203 #define FNM_LEADING_DIR 0x08 /* Ignore /<tail> after Imatch. */
204 #define FNM_CASEFOLD 0x10 /* Case insensitive search. */
205 #define FNM_IGNORECASE FNM_CASEFOLD
206 #define FNM_FILE_NAME FNM_PATHNAME
207
208 #endif /* !_SYS_LIBKERN_H_ */
209