xref: /freebsd-11.0-release/usr.bin/random/randomize_fd.h

/*
 * Copyright (C) 2003 Sean Chittenden <seanc@FreeBSD.org>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
 *
 * $FreeBSD: head/games/random/randomize_fd.h 181410 2008-08-08 01:42:17Z ache $
 */

#ifndef __RANDOMIZE_FD__
#define __RANDOMIZE_FD__

/*
 * The random() function is defined to return values between 0 and
 * 2^31 - 1 inclusive in random(3).
 */
#define	RANDOM_MAX	0x80000000UL

#define RANDOM_TYPE_UNSET 0
#define RANDOM_TYPE_LINES 1
#define RANDOM_TYPE_WORDS 2

/* The multiple instance single integer key */
struct rand_node {
	u_char *cp;
	u_int len;
	struct rand_node *next;
};

int randomize_fd(int fd, int type, int unique, double denom);

#endif