libkern.h revision 329175
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/11/sys/sys/libkern.h 329175 2018-02-12 17:44:35Z kevans $ 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 bool 57validbcd(int bcd) 58{ 59 60 return (bcd == 0 || (bcd > 0 && bcd <= 0x99 && bcd2bin_data[bcd] != 0)); 61} 62 63static __inline int imax(int a, int b) { return (a > b ? a : b); } 64static __inline int imin(int a, int b) { return (a < b ? a : b); } 65static __inline long lmax(long a, long b) { return (a > b ? a : b); } 66static __inline long lmin(long a, long b) { return (a < b ? a : b); } 67static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); } 68static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); } 69static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); } 70static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); } 71static __inline u_quad_t uqmax(u_quad_t a, u_quad_t b) { return (a > b ? a : b); } 72static __inline u_quad_t uqmin(u_quad_t a, u_quad_t b) { return (a < b ? a : b); } 73static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); } 74static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); } 75static __inline __uintmax_t ummax(__uintmax_t a, __uintmax_t b) 76{ 77 78 return (a > b ? a : b); 79} 80static __inline __uintmax_t ummin(__uintmax_t a, __uintmax_t b) 81{ 82 83 return (a < b ? a : b); 84} 85static __inline off_t omax(off_t a, off_t b) { return (a > b ? a : b); } 86static __inline off_t omin(off_t a, off_t b) { return (a < b ? a : b); } 87 88static __inline int abs(int a) { return (a < 0 ? -a : a); } 89static __inline long labs(long a) { return (a < 0 ? -a : a); } 90static __inline quad_t qabs(quad_t a) { return (a < 0 ? -a : a); } 91 92#define ARC4_ENTR_NONE 0 /* Don't have entropy yet. */ 93#define ARC4_ENTR_HAVE 1 /* Have entropy. */ 94#define ARC4_ENTR_SEED 2 /* Reseeding. */ 95extern int arc4rand_iniseed_state; 96 97/* Prototypes for non-quad routines. */ 98struct malloc_type; 99uint32_t arc4random(void); 100void arc4rand(void *ptr, u_int len, int reseed); 101int bcmp(const void *, const void *, size_t); 102int timingsafe_bcmp(const void *, const void *, size_t); 103void *bsearch(const void *, const void *, size_t, 104 size_t, int (*)(const void *, const void *)); 105#ifndef HAVE_INLINE_FFS 106int ffs(int); 107#endif 108#ifndef HAVE_INLINE_FFSL 109int ffsl(long); 110#endif 111#ifndef HAVE_INLINE_FFSLL 112int ffsll(long long); 113#endif 114#ifndef HAVE_INLINE_FLS 115int fls(int); 116#endif 117#ifndef HAVE_INLINE_FLSL 118int flsl(long); 119#endif 120#ifndef HAVE_INLINE_FLSLL 121int flsll(long long); 122#endif 123#define bitcount64(x) __bitcount64((uint64_t)(x)) 124#define bitcount32(x) __bitcount32((uint32_t)(x)) 125#define bitcount16(x) __bitcount16((uint16_t)(x)) 126#define bitcountl(x) __bitcountl((u_long)(x)) 127#define bitcount(x) __bitcount((u_int)(x)) 128 129int fnmatch(const char *, const char *, int); 130int locc(int, char *, u_int); 131void *memchr(const void *s, int c, size_t n); 132void *memcchr(const void *s, int c, size_t n); 133int memcmp(const void *b1, const void *b2, size_t len); 134void *memmem(const void *l, size_t l_len, const void *s, size_t s_len); 135void qsort(void *base, size_t nmemb, size_t size, 136 int (*compar)(const void *, const void *)); 137void qsort_r(void *base, size_t nmemb, size_t size, void *thunk, 138 int (*compar)(void *, const void *, const void *)); 139u_long random(void); 140int scanc(u_int, const u_char *, const u_char *, int); 141void srandom(u_long); 142int strcasecmp(const char *, const char *); 143char *strcat(char * __restrict, const char * __restrict); 144char *strchr(const char *, int); 145int strcmp(const char *, const char *); 146char *strcpy(char * __restrict, const char * __restrict); 147size_t strcspn(const char * __restrict, const char * __restrict) __pure; 148char *strdup(const char *__restrict, struct malloc_type *); 149char *strncat(char *, const char *, size_t); 150char *strndup(const char *__restrict, size_t, struct malloc_type *); 151size_t strlcat(char *, const char *, size_t); 152size_t strlcpy(char *, const char *, size_t); 153size_t strlen(const char *); 154int strncasecmp(const char *, const char *, size_t); 155int strncmp(const char *, const char *, size_t); 156char *strncpy(char * __restrict, const char * __restrict, size_t); 157size_t strnlen(const char *, size_t); 158char *strrchr(const char *, int); 159char *strsep(char **, const char *delim); 160size_t strspn(const char *, const char *); 161char *strstr(const char *, const char *); 162int strvalid(const char *, size_t); 163 164extern const uint32_t crc32_tab[]; 165 166static __inline uint32_t 167crc32_raw(const void *buf, size_t size, uint32_t crc) 168{ 169 const uint8_t *p = (const uint8_t *)buf; 170 171 while (size--) 172 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8); 173 return (crc); 174} 175 176static __inline uint32_t 177crc32(const void *buf, size_t size) 178{ 179 uint32_t crc; 180 181 crc = crc32_raw(buf, size, ~0U); 182 return (crc ^ ~0U); 183} 184 185uint32_t 186calculate_crc32c(uint32_t crc32c, const unsigned char *buffer, 187 unsigned int length); 188#ifdef _KERNEL 189#if defined(__amd64__) || defined(__i386__) 190uint32_t sse42_crc32c(uint32_t, const unsigned char *, unsigned); 191#endif 192#if defined(__aarch64__) 193uint32_t armv8_crc32c(uint32_t, const unsigned char *, unsigned int); 194#endif 195#endif 196 197 198LIBKERN_INLINE void *memset(void *, int, size_t); 199#ifdef LIBKERN_BODY 200LIBKERN_INLINE void * 201memset(void *b, int c, size_t len) 202{ 203 char *bb; 204 205 if (c == 0) 206 bzero(b, len); 207 else 208 for (bb = (char *)b; len--; ) 209 *bb++ = c; 210 return (b); 211} 212#endif 213 214static __inline char * 215index(const char *p, int ch) 216{ 217 218 return (strchr(p, ch)); 219} 220 221static __inline char * 222rindex(const char *p, int ch) 223{ 224 225 return (strrchr(p, ch)); 226} 227 228/* fnmatch() return values. */ 229#define FNM_NOMATCH 1 /* Match failed. */ 230 231/* fnmatch() flags. */ 232#define FNM_NOESCAPE 0x01 /* Disable backslash escaping. */ 233#define FNM_PATHNAME 0x02 /* Slash must be matched by slash. */ 234#define FNM_PERIOD 0x04 /* Period must be matched by period. */ 235#define FNM_LEADING_DIR 0x08 /* Ignore /<tail> after Imatch. */ 236#define FNM_CASEFOLD 0x10 /* Case insensitive search. */ 237#define FNM_IGNORECASE FNM_CASEFOLD 238#define FNM_FILE_NAME FNM_PATHNAME 239 240#endif /* !_SYS_LIBKERN_H_ */ 241