The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/libkern.h

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    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/10.2/sys/sys/libkern.h 281538 2015-04-14 20:05:26Z jhb $
   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 #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    *strndup(const char *__restrict, size_t, struct malloc_type *);
  126 size_t   strlcat(char *, const char *, size_t);
  127 size_t   strlcpy(char *, const char *, size_t);
  128 size_t   strlen(const char *);
  129 int      strncasecmp(const char *, const char *, size_t);
  130 int      strncmp(const char *, const char *, size_t);
  131 char    *strncpy(char * __restrict, const char * __restrict, size_t);
  132 size_t   strnlen(const char *, size_t);
  133 char    *strrchr(const char *, int);
  134 char    *strsep(char **, const char *delim);
  135 size_t   strspn(const char *, const char *);
  136 char    *strstr(const char *, const char *);
  137 int      strvalid(const char *, size_t);
  138 
  139 extern const uint32_t crc32_tab[];
  140 
  141 static __inline uint32_t
  142 crc32_raw(const void *buf, size_t size, uint32_t crc)
  143 {
  144         const uint8_t *p = (const uint8_t *)buf;
  145 
  146         while (size--)
  147                 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
  148         return (crc);
  149 }
  150 
  151 static __inline uint32_t
  152 crc32(const void *buf, size_t size)
  153 {
  154         uint32_t crc;
  155 
  156         crc = crc32_raw(buf, size, ~0U);
  157         return (crc ^ ~0U);
  158 }
  159 
  160 uint32_t
  161 calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
  162     unsigned int length);
  163 
  164 
  165 LIBKERN_INLINE void *memset(void *, int, size_t);
  166 #ifdef LIBKERN_BODY
  167 LIBKERN_INLINE void *
  168 memset(void *b, int c, size_t len)
  169 {
  170         char *bb;
  171 
  172         if (c == 0)
  173                 bzero(b, len);
  174         else
  175                 for (bb = (char *)b; len--; )
  176                         *bb++ = c;
  177         return (b);
  178 }
  179 #endif
  180 
  181 static __inline char *
  182 index(const char *p, int ch)
  183 {
  184 
  185         return (strchr(p, ch));
  186 }
  187 
  188 static __inline char *
  189 rindex(const char *p, int ch)
  190 {
  191 
  192         return (strrchr(p, ch));
  193 }
  194 
  195 /* fnmatch() return values. */
  196 #define FNM_NOMATCH     1       /* Match failed. */
  197 
  198 /* fnmatch() flags. */
  199 #define FNM_NOESCAPE    0x01    /* Disable backslash escaping. */
  200 #define FNM_PATHNAME    0x02    /* Slash must be matched by slash. */
  201 #define FNM_PERIOD      0x04    /* Period must be matched by period. */
  202 #define FNM_LEADING_DIR 0x08    /* Ignore /<tail> after Imatch. */
  203 #define FNM_CASEFOLD    0x10    /* Case insensitive search. */
  204 #define FNM_IGNORECASE  FNM_CASEFOLD
  205 #define FNM_FILE_NAME   FNM_PATHNAME
  206 
  207 #endif /* !_SYS_LIBKERN_H_ */

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