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

     /*-
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)libkern.h   8.1 (Berkeley) 6/10/93
     * $FreeBSD$
     */
    
    #ifndef _SYS_LIBKERN_H_
    #define _SYS_LIBKERN_H_
    
    #include <sys/cdefs.h>
    #include <sys/types.h>
    #ifdef _KERNEL
    #include <sys/systm.h>
    #endif
    
    /* BCD conversions. */
    extern u_char const     bcd2bin_data[];
    extern u_char const     bin2bcd_data[];
    extern char const       hex2ascii_data[];
    
    #define bcd2bin(bcd)    (bcd2bin_data[bcd])
    #define bin2bcd(bin)    (bin2bcd_data[bin])
    #define hex2ascii(hex)  (hex2ascii_data[hex])
    
    static __inline int imax(int a, int b) { return (a > b ? a : b); }
    static __inline int imin(int a, int b) { return (a < b ? a : b); }
    static __inline long lmax(long a, long b) { return (a > b ? a : b); }
    static __inline long lmin(long a, long b) { return (a < b ? a : b); }
    static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
    static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
    static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
    static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
    static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
    static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
    
    /* Prototypes for non-quad routines. */
    u_int32_t arc4random __P((void));
    int      bcmp __P((const void *, const void *, size_t));
    #ifndef HAVE_INLINE_FFS
    int      ffs __P((int));
    #endif
    #ifndef HAVE_INLINE_FLS
    int      fls __P((int));
    #endif
    int      locc __P((int, char *, u_int));
    void     qsort __P((void *base, size_t nmemb, size_t size,
                        int (*compar)(const void *, const void *)));
    u_long   random __P((void));
    char    *index __P((const char *, int));
    char    *rindex __P((const char *, int));
    int      scanc __P((u_int, const u_char *, const u_char *, int));
    int      skpc __P((int, int, char *));
    void     srandom __P((u_long));
    char    *strcat __P((char *, const char *));
    int      strcmp __P((const char *, const char *));
    char    *strcpy __P((char *, const char *));
    size_t   strlen __P((const char *));
    int      strncmp __P((const char *, const char *, size_t));
    char    *strncpy __P((char *, const char *, size_t));
    
    
    static __inline int
    memcmp(const void *b1, const void *b2, size_t len)
    {
            return (bcmp(b1, b2, len));
    }
    
    static __inline void *
    memset(void *b, int c, size_t len)
   {
           char *bb;
   
           if (c == 0)
                   bzero(b, len);
           else
                   for (bb = (char *)b; len--; )
                           *bb++ = c;
           return (b);
   }
   
   #endif /* !_SYS_LIBKERN_H_ */

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