Date: Thu, 5 Feb 2015 20:23:37 +0000 (UTC) From: John-Mark Gurney <jmg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r278280 - head/tools/tools/qrndtest Message-ID: <201502052023.t15KNbkt028288@svn.freebsd.org>
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Author: jmg Date: Thu Feb 5 20:23:36 2015 New Revision: 278280 URL: https://svnweb.freebsd.org/changeset/base/278280 Log: add a quick testing program I wrote for adrian... Added: head/tools/tools/qrndtest/ head/tools/tools/qrndtest/Makefile (contents, props changed) head/tools/tools/qrndtest/README (contents, props changed) head/tools/tools/qrndtest/r.c (contents, props changed) Added: head/tools/tools/qrndtest/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/tools/qrndtest/Makefile Thu Feb 5 20:23:36 2015 (r278280) @@ -0,0 +1,11 @@ +# +# $FreeBSD$ +# + +PROG = qrndtest + +SRCS = r.c + +NO_MAN= + +.include <bsd.prog.mk> Added: head/tools/tools/qrndtest/README ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/tools/qrndtest/README Thu Feb 5 20:23:36 2015 (r278280) @@ -0,0 +1,4 @@ +This is a really quick random testing that I wrote for adrian. + +If you want a real randomness tester, look at dieharder that has a much +larger battery of tests and will tell you if your PRNG is good or not. Added: head/tools/tools/qrndtest/r.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/tools/qrndtest/r.c Thu Feb 5 20:23:36 2015 (r278280) @@ -0,0 +1,81 @@ +/*- + * Copyright 2015 John-Mark Gurney. + * 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 AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + * + */ + +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <strings.h> + +typedef uint32_t (*rndfun_t)(); + +uint32_t +randomwrap() +{ + return random(); +} + +struct { + const char *name; + rndfun_t rndfun; +} rndfuns[] = { + { "random", randomwrap }, + { "arc4random", arc4random }, + { NULL, NULL }, +}; + +int +main(int argc, char *argv[]) +{ + uint64_t vals[4] = {}; + uint64_t avg; + unsigned int i; + rndfun_t f; + + if (argc == 1) + f = rndfuns[0].rndfun; + else { + for (i = 0; rndfuns[i].name != NULL; i++) { + if (strcasecmp(rndfuns[i].name, argv[1]) == 0) + break; + } + if (rndfuns[i].name == NULL) + return 1; + f = rndfuns[i].rndfun; + } + + for (;;) { + vals[f() % 4]++; + if (((i++) % (4*1024*1024)) == 0) { + avg = vals[0] + vals[1] + vals[2] + vals[3]; + avg /= 4; + printf("%d: %ld %ld %ld %ld\n", i, vals[0] - avg, vals[1] - avg, vals[2] - avg, vals[3] - avg); + } + } + return 0; +}
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