/*-
 * 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. 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: src/sys/sys/libkern.h,v 1.20.2.2 2001/09/30 21:12:54 luigi Exp $
 */

#ifndef _SYS_LIBKERN_H_
#define _SYS_LIBKERN_H_

#if !defined(_KERNEL)
#error "This file should not be included by userland programs."
#endif

/*
 * Hacks to prevent conflicts with standard header files
 */

#ifndef _SYS_CDEFS_H_
#include <sys/cdefs.h>
#endif
#ifndef _SYS_TYPES_H_
#include <sys/types.h>
#endif
#ifndef _SYS_SYSTM_H_
#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])

/*
 * Number of bytes needed for hexadecimal representation
 * plus trailing \0
 */
#define HEX_NCPYLEN(s)  (s * 3)

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 umax(u_int a, u_int b) { return (a > b ? a : b); }
static __inline u_int umin(u_int a, u_int 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); }
static __inline u_int64_t u64max(u_int64_t a, u_int64_t b) { return (a > b ? a : b); }
static __inline u_int64_t u64min(u_int64_t a, u_int64_t b) { return (a < b ? a : b); }
static __inline int64_t i64max(int64_t a, int64_t b) { return (a > b ? a : b); }
static __inline int64_t i64min(int64_t a, int64_t b) { return (a < b ? a : b); }
static __inline size_t szmax(size_t a, size_t b) { return (a > b ? a : b); }
static __inline size_t szmin(size_t a, size_t b) { return (a < b ? a : b); }

static __inline int abs(int a) { return (a < 0 ? -a : a); }
static __inline long labs(long a) { return (a < 0 ? -a : a); }
static __inline quad_t qabs(quad_t a) { return (a < 0 ? -a : a); }

/* Prototypes for non-quad routines. */
uint32_t karc4random(void);
uint64_t karc4random64(void);
uint32_t karc4random_uniform(uint32_t upper_bound);
void     karc4random_buf(void *, size_t);
void     arc4_init_pcpu(int cpuid);
int      bcmp(const void *, const void *, size_t);
int      timingsafe_bcmp(const void *, const void *, size_t);
void    *kbsearch(const void *, const void *, size_t,
                     size_t, int (*)(const void *, const void *));
#ifndef HAVE_INLINE_FFS
int      ffs(int);
#endif
#ifndef HAVE_INLINE_FFSL
int      ffsl(long);
#endif
#ifndef HAVE_INLINE_FLS
int      fls(int);
#endif
#ifndef HAVE_INLINE_FLSL
int      flsl(long);
#endif
#ifndef HAVE_INLINE_FLSLL
int      flsll(long long);
#endif
void     kqsort(void *base, size_t nmemb, size_t size,
                    int (*compar)(const void *, const void *));
void     kqsort_r(void *base, size_t nmemb, size_t size, void *thunk,
                    int (*compar)(void *, const void *, const void *));
u_long   krandom(void);
char    *index(const char *, int);
char    *rindex(const char *, int);
int      scanc(u_int, const u_char *, const u_char *, int);
int      skpc(int, int, char *);
void     skrandom(u_long);
char    *strcat(char * __restrict, const char * __restrict);
char    *strncat(char * __restrict, const char * __restrict, size_t);
int      strcmp(const char *, const char *);
int      strcasecmp(const char *, const char *);
char    *strcpy(char * __restrict, const char * __restrict);
size_t   strlcat(char *, const char *, size_t);
size_t   strlcpy(char *, const char *, size_t);
size_t   strlen(const char *);
int      strncmp(const char *, const char *, size_t);
int      strncasecmp(const char *, const char *, size_t);
char    *strncpy(char * __restrict, const char * __restrict, size_t);
size_t   strnlen(const char *, size_t);
char    *strsep(char **, const char *);
char    *strstr(const char *, const char *);
int      _kfnmatch(const char *, const char *, int, int);
void    *memcchr(const void *, int, size_t);
char    *hexncpy(const u_char *, int, char *, int, const char *);

/*
 * memset can't be an inline, it is used by gcc-4.x directly.
 */
/*void  *memset(void *, int, size_t);*/
/*void  *memmove(void *, const void *, size_t);*/


static __inline int
kfnmatch(const char *pattern, const char *string, int flags)
{
        return(_kfnmatch(pattern, string, flags, 0));
}

static __inline int
memcmp(const void *b1, const void *b2, size_t len)
{
        return (bcmp(b1, b2, len));
}

static __inline char *
strchr(const char *p, int ch)
{
        return (index(p, ch));
}

static __inline char *
strrchr(const char *p, int ch)
{
        return (rindex(p, ch));
}

/* kfnmatch() return values. */
#define FNM_NOMATCH     1       /* Match failed. */

/* kfnmatch() flags. */
#define FNM_NOESCAPE    0x01    /* Disable backslash escaping. */
#define FNM_PATHNAME    0x02    /* Slash must be matched by slash. */
#define FNM_PERIOD      0x04    /* Period must be matched by period. */
#define FNM_LEADING_DIR 0x08    /* Ignore /<tail> after Imatch. */
#define FNM_CASEFOLD    0x10    /* Case insensitive search. */
#define FNM_IGNORECASE  FNM_CASEFOLD
#define FNM_FILE_NAME   FNM_PATHNAME

#endif  /* !_SYS_LIBKERN_H_ */