1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _SYS_LIBKERN_H_ 33 #define _SYS_LIBKERN_H_ 34 35 #include <sys/types.h> 36 #ifdef _KERNEL 37 #include <sys/systm.h> 38 #endif 39 40 #ifndef LIBKERN_INLINE 41 #define LIBKERN_INLINE static __inline 42 #define LIBKERN_BODY 43 #endif 44 45 /* BCD conversions. */ 46 extern u_char const bcd2bin_data[]; 47 extern u_char const bin2bcd_data[]; 48 extern char const hex2ascii_data[]; 49 50 #define LIBKERN_LEN_BCD2BIN 154 51 #define LIBKERN_LEN_BIN2BCD 100 52 #define LIBKERN_LEN_HEX2ASCII 36 53 54 static inline u_char 55 bcd2bin(int bcd) 56 { 57 58 KASSERT(bcd >= 0 && bcd < LIBKERN_LEN_BCD2BIN, 59 ("invalid bcd %d", bcd)); 60 return (bcd2bin_data[bcd]); 61 } 62 63 static inline u_char 64 bin2bcd(int bin) 65 { 66 67 KASSERT(bin >= 0 && bin < LIBKERN_LEN_BIN2BCD, 68 ("invalid bin %d", bin)); 69 return (bin2bcd_data[bin]); 70 } 71 72 static inline char 73 hex2ascii(int hex) 74 { 75 76 KASSERT(hex >= 0 && hex < LIBKERN_LEN_HEX2ASCII, 77 ("invalid hex %d", hex)); 78 return (hex2ascii_data[hex]); 79 } 80 81 static inline bool 82 validbcd(int bcd) 83 { 84 85 return (bcd == 0 || (bcd > 0 && bcd <= 0x99 && bcd2bin_data[bcd] != 0)); 86 } 87 static __inline int imax(int a, int b) { return (a > b ? a : b); } 88 static __inline int imin(int a, int b) { return (a < b ? a : b); } 89 static __inline long lmax(long a, long b) { return (a > b ? a : b); } 90 static __inline long lmin(long a, long b) { return (a < b ? a : b); } 91 static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); } 92 static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); } 93 static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); } 94 static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); } 95 static __inline u_quad_t uqmax(u_quad_t a, u_quad_t b) { return (a > b ? a : b); } 96 static __inline u_quad_t uqmin(u_quad_t a, u_quad_t b) { return (a < b ? a : b); } 97 static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); } 98 static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); } 99 static __inline __uintmax_t ummax(__uintmax_t a, __uintmax_t b) 100 { 101 102 return (a > b ? a : b); 103 } 104 static __inline __uintmax_t ummin(__uintmax_t a, __uintmax_t b) 105 { 106 107 return (a < b ? a : b); 108 } 109 static __inline off_t omax(off_t a, off_t b) { return (a > b ? a : b); } 110 static __inline off_t omin(off_t a, off_t b) { return (a < b ? a : b); } 111 static __inline int abs(int a) { return (a < 0 ? -a : a); } 112 static __inline long labs(long a) { return (a < 0 ? -a : a); } 113 static __inline int64_t abs64(int64_t a) { return (a < 0 ? -a : a); } 114 static __inline quad_t qabs(quad_t a) { return (a < 0 ? -a : a); } 115 116 #ifndef RANDOM_FENESTRASX 117 #define ARC4_ENTR_NONE 0 /* Don't have entropy yet. */ 118 #define ARC4_ENTR_HAVE 1 /* Have entropy. */ 119 #define ARC4_ENTR_SEED 2 /* Reseeding. */ 120 extern int arc4rand_iniseed_state; 121 #endif 122 123 /* Prototypes for non-quad routines. */ 124 struct malloc_type; 125 uint32_t arc4random(void); 126 void arc4random_buf(void *, size_t); 127 uint32_t arc4random_uniform(uint32_t); 128 void arc4rand(void *, u_int, int); 129 int timingsafe_bcmp(const void *, const void *, size_t); 130 void *bsearch(const void *, const void *, size_t, 131 size_t, int (*)(const void *, const void *)); 132 133 /* 134 * MHTODO: remove the 'HAVE_INLINE_FOO' defines once use of these flags has 135 * been purged everywhere. For now we provide them unconditionally. 136 */ 137 #define HAVE_INLINE_FFS 138 #define HAVE_INLINE_FFSL 139 #define HAVE_INLINE_FFSLL 140 #define HAVE_INLINE_FLS 141 #define HAVE_INLINE_FLSL 142 #define HAVE_INLINE_FLSLL 143 144 static __inline __pure2 int 145 ffs(int mask) 146 { 147 148 return (__builtin_ffs((u_int)mask)); 149 } 150 151 static __inline __pure2 int 152 ffsl(long mask) 153 { 154 155 return (__builtin_ffsl((u_long)mask)); 156 } 157 158 static __inline __pure2 int 159 ffsll(long long mask) 160 { 161 162 return (__builtin_ffsll((unsigned long long)mask)); 163 } 164 165 static __inline __pure2 int 166 fls(int mask) 167 { 168 169 return (mask == 0 ? 0 : 170 8 * sizeof(mask) - __builtin_clz((u_int)mask)); 171 } 172 173 static __inline __pure2 int 174 flsl(long mask) 175 { 176 177 return (mask == 0 ? 0 : 178 8 * sizeof(mask) - __builtin_clzl((u_long)mask)); 179 } 180 181 static __inline __pure2 int 182 flsll(long long mask) 183 { 184 185 return (mask == 0 ? 0 : 186 8 * sizeof(mask) - __builtin_clzll((unsigned long long)mask)); 187 } 188 189 #define bitcount64(x) __bitcount64((uint64_t)(x)) 190 #define bitcount32(x) __bitcount32((uint32_t)(x)) 191 #define bitcount16(x) __bitcount16((uint16_t)(x)) 192 #define bitcountl(x) __bitcountl((u_long)(x)) 193 #define bitcount(x) __bitcount((u_int)(x)) 194 195 int fnmatch(const char *, const char *, int); 196 int locc(int, char *, u_int); 197 void *memchr(const void *s, int c, size_t n); 198 void *memcchr(const void *s, int c, size_t n); 199 void *memmem(const void *l, size_t l_len, const void *s, size_t s_len); 200 void qsort(void *base, size_t nmemb, size_t size, 201 int (*compar)(const void *, const void *)); 202 void qsort_r(void *base, size_t nmemb, size_t size, 203 int (*compar)(const void *, const void *, void *), void *thunk); 204 u_long random(void); 205 int scanc(u_int, const u_char *, const u_char *, int); 206 int strcasecmp(const char *, const char *); 207 char *strcasestr(const char *, const char *); 208 char *strcat(char * __restrict, const char * __restrict); 209 char *strchr(const char *, int); 210 char *strchrnul(const char *, int); 211 int strcmp(const char *, const char *); 212 char *strcpy(char * __restrict, const char * __restrict); 213 char *strdup_flags(const char *__restrict, struct malloc_type *, int); 214 size_t strcspn(const char *, const char *) __pure; 215 char *strdup(const char *__restrict, struct malloc_type *); 216 char *strncat(char *, const char *, size_t); 217 char *strndup(const char *__restrict, size_t, struct malloc_type *); 218 size_t strlcat(char *, const char *, size_t); 219 size_t strlcpy(char *, const char *, size_t); 220 size_t strlen(const char *); 221 int strncasecmp(const char *, const char *, size_t); 222 int strncmp(const char *, const char *, size_t); 223 char *strncpy(char * __restrict, const char * __restrict, size_t); 224 size_t strnlen(const char *, size_t); 225 char *strnstr(const char *, const char *, size_t); 226 char *strrchr(const char *, int); 227 char *strsep(char **, const char *delim); 228 size_t strspn(const char *, const char *); 229 char *strstr(const char *, const char *); 230 int strvalid(const char *, size_t); 231 232 #ifdef SAN_NEEDS_INTERCEPTORS 233 #ifndef SAN_INTERCEPTOR 234 #define SAN_INTERCEPTOR(func) \ 235 __CONCAT(SAN_INTERCEPTOR_PREFIX, __CONCAT(_, func)) 236 #endif 237 char *SAN_INTERCEPTOR(strcpy)(char *, const char *); 238 int SAN_INTERCEPTOR(strcmp)(const char *, const char *); 239 size_t SAN_INTERCEPTOR(strlen)(const char *); 240 #ifndef SAN_RUNTIME 241 #define strcpy(d, s) SAN_INTERCEPTOR(strcpy)((d), (s)) 242 #define strcmp(s1, s2) SAN_INTERCEPTOR(strcmp)((s1), (s2)) 243 #define strlen(s) SAN_INTERCEPTOR(strlen)(s) 244 #endif /* !SAN_RUNTIME */ 245 #else /* !SAN_NEEDS_INTERCEPTORS */ 246 #define strcpy(d, s) __builtin_strcpy((d), (s)) 247 #define strcmp(s1, s2) __builtin_strcmp((s1), (s2)) 248 #define strlen(s) __builtin_strlen((s)) 249 #endif /* SAN_NEEDS_INTERCEPTORS */ 250 251 static __inline char * 252 index(const char *p, int ch) 253 { 254 255 return (strchr(p, ch)); 256 } 257 258 static __inline char * 259 rindex(const char *p, int ch) 260 { 261 262 return (strrchr(p, ch)); 263 } 264 265 static __inline int64_t 266 signed_extend64(uint64_t bitmap, int lsb, int width) 267 { 268 269 return ((int64_t)(bitmap << (63 - lsb - (width - 1)))) >> 270 (63 - (width - 1)); 271 } 272 273 static __inline int32_t 274 signed_extend32(uint32_t bitmap, int lsb, int width) 275 { 276 277 return ((int32_t)(bitmap << (31 - lsb - (width - 1)))) >> 278 (31 - (width - 1)); 279 } 280 281 /* fnmatch() return values. */ 282 #define FNM_NOMATCH 1 /* Match failed. */ 283 284 /* fnmatch() flags. */ 285 #define FNM_NOESCAPE 0x01 /* Disable backslash escaping. */ 286 #define FNM_PATHNAME 0x02 /* Slash must be matched by slash. */ 287 #define FNM_PERIOD 0x04 /* Period must be matched by period. */ 288 #define FNM_LEADING_DIR 0x08 /* Ignore /<tail> after Imatch. */ 289 #define FNM_CASEFOLD 0x10 /* Case insensitive search. */ 290 #define FNM_IGNORECASE FNM_CASEFOLD 291 #define FNM_FILE_NAME FNM_PATHNAME 292 293 #endif /* !_SYS_LIBKERN_H_ */ 294