2 * Copyright 2015 John-Mark Gurney.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 typedef uint32_t (*rndfun_t)();
47 { "random", randomwrap },
48 { "arc4random", arc4random },
53 main(int argc, char *argv[])
55 uint64_t vals[4] = {};
61 f = rndfuns[0].rndfun;
63 for (i = 0; rndfuns[i].name != NULL; i++) {
64 if (strcasecmp(rndfuns[i].name, argv[1]) == 0)
67 if (rndfuns[i].name == NULL)
69 f = rndfuns[i].rndfun;
74 if (((i++) % (4*1024*1024)) == 0) {
75 avg = vals[0] + vals[1] + vals[2] + vals[3];
77 printf("%d: %ld %ld %ld %ld\n", i, vals[0] - avg, vals[1] - avg, vals[2] - avg, vals[3] - avg);