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 * $FreeBSD$
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); }
uqmax(u_quad_t a,u_quad_t b)64 static __inline u_quad_t uqmax(u_quad_t a, u_quad_t b) { return (a > b ? a : b); }
uqmin(u_quad_t a,u_quad_t b)65 static __inline u_quad_t uqmin(u_quad_t a, u_quad_t b) { return (a < b ? a : b); }
ulmax(u_long a,u_long b)66 static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
ulmin(u_long a,u_long b)67 static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
omax(off_t a,off_t b)68 static __inline off_t omax(off_t a, off_t b) { return (a > b ? a : b); }
omin(off_t a,off_t b)69 static __inline off_t omin(off_t a, off_t b) { return (a < b ? a : b); }
70
abs(int a)71 static __inline int abs(int a) { return (a < 0 ? -a : a); }
labs(long a)72 static __inline long labs(long a) { return (a < 0 ? -a : a); }
qabs(quad_t a)73 static __inline quad_t qabs(quad_t a) { return (a < 0 ? -a : a); }
74
75 #define ARC4_ENTR_NONE 0 /* Don't have entropy yet. */
76 #define ARC4_ENTR_HAVE 1 /* Have entropy. */
77 #define ARC4_ENTR_SEED 2 /* Reseeding. */
78 extern int arc4rand_iniseed_state;
79
80 /* Prototypes for non-quad routines. */
81 struct malloc_type;
82 uint32_t arc4random(void);
83 void arc4rand(void *ptr, u_int len, int reseed);
84 int bcmp(const void *, const void *, size_t);
85 int timingsafe_bcmp(const void *, const void *, size_t);
86 void *bsearch(const void *, const void *, size_t,
87 size_t, int (*)(const void *, const void *));
88 #ifndef HAVE_INLINE_FFS
89 int ffs(int);
90 #endif
91 #ifndef HAVE_INLINE_FFSL
92 int ffsl(long);
93 #endif
94 #ifndef HAVE_INLINE_FFSLL
95 int ffsll(long long);
96 #endif
97 #ifndef HAVE_INLINE_FLS
98 int fls(int);
99 #endif
100 #ifndef HAVE_INLINE_FLSL
101 int flsl(long);
102 #endif
103 #ifndef HAVE_INLINE_FLSLL
104 int flsll(long long);
105 #endif
106 #define bitcount64(x) __bitcount64((uint64_t)(x))
107 #define bitcount32(x) __bitcount32((uint32_t)(x))
108 #define bitcount16(x) __bitcount16((uint16_t)(x))
109 #define bitcountl(x) __bitcountl((u_long)(x))
110 #define bitcount(x) __bitcount((u_int)(x))
111
112 int fnmatch(const char *, const char *, int);
113 int locc(int, char *, u_int);
114 void *memchr(const void *s, int c, size_t n);
115 void *memcchr(const void *s, int c, size_t n);
116 int memcmp(const void *b1, const void *b2, size_t len);
117 void *memmem(const void *l, size_t l_len, const void *s, size_t s_len);
118 void qsort(void *base, size_t nmemb, size_t size,
119 int (*compar)(const void *, const void *));
120 void qsort_r(void *base, size_t nmemb, size_t size, void *thunk,
121 int (*compar)(void *, const void *, const void *));
122 u_long random(void);
123 int scanc(u_int, const u_char *, const u_char *, int);
124 void srandom(u_long);
125 int strcasecmp(const char *, const char *);
126 char *strcat(char * __restrict, const char * __restrict);
127 char *strchr(const char *, int);
128 int strcmp(const char *, const char *);
129 char *strcpy(char * __restrict, const char * __restrict);
130 size_t strcspn(const char * __restrict, const char * __restrict) __pure;
131 char *strdup(const char *__restrict, struct malloc_type *);
132 char *strndup(const char *__restrict, size_t, struct malloc_type *);
133 size_t strlcat(char *, const char *, size_t);
134 size_t strlcpy(char *, const char *, size_t);
135 size_t strlen(const char *);
136 int strncasecmp(const char *, const char *, size_t);
137 int strncmp(const char *, const char *, size_t);
138 char *strncpy(char * __restrict, const char * __restrict, size_t);
139 size_t strnlen(const char *, size_t);
140 char *strrchr(const char *, int);
141 char *strsep(char **, const char *delim);
142 size_t strspn(const char *, const char *);
143 char *strstr(const char *, const char *);
144 int strvalid(const char *, size_t);
145
146 extern const uint32_t crc32_tab[];
147
148 static __inline uint32_t
crc32_raw(const void * buf,size_t size,uint32_t crc)149 crc32_raw(const void *buf, size_t size, uint32_t crc)
150 {
151 const uint8_t *p = (const uint8_t *)buf;
152
153 while (size--)
154 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
155 return (crc);
156 }
157
158 static __inline uint32_t
crc32(const void * buf,size_t size)159 crc32(const void *buf, size_t size)
160 {
161 uint32_t crc;
162
163 crc = crc32_raw(buf, size, ~0U);
164 return (crc ^ ~0U);
165 }
166
167 uint32_t
168 calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
169 unsigned int length);
170
171
172 LIBKERN_INLINE void *memset(void *, int, size_t);
173 #ifdef LIBKERN_BODY
174 LIBKERN_INLINE void *
memset(void * b,int c,size_t len)175 memset(void *b, int c, size_t len)
176 {
177 char *bb;
178
179 if (c == 0)
180 bzero(b, len);
181 else
182 for (bb = (char *)b; len--; )
183 *bb++ = c;
184 return (b);
185 }
186 #endif
187
188 static __inline char *
index(const char * p,int ch)189 index(const char *p, int ch)
190 {
191
192 return (strchr(p, ch));
193 }
194
195 static __inline char *
rindex(const char * p,int ch)196 rindex(const char *p, int ch)
197 {
198
199 return (strrchr(p, ch));
200 }
201
202 /* fnmatch() return values. */
203 #define FNM_NOMATCH 1 /* Match failed. */
204
205 /* fnmatch() flags. */
206 #define FNM_NOESCAPE 0x01 /* Disable backslash escaping. */
207 #define FNM_PATHNAME 0x02 /* Slash must be matched by slash. */
208 #define FNM_PERIOD 0x04 /* Period must be matched by period. */
209 #define FNM_LEADING_DIR 0x08 /* Ignore /<tail> after Imatch. */
210 #define FNM_CASEFOLD 0x10 /* Case insensitive search. */
211 #define FNM_IGNORECASE FNM_CASEFOLD
212 #define FNM_FILE_NAME FNM_PATHNAME
213
214 #endif /* !_SYS_LIBKERN_H_ */
215