tools/regression/acct/pack.c

   1 /*-
   2  * Copyright (c) 2007 Diomidis Spinellis. All rights reserved.
   3  * Redistribution and use in source and binary forms, with or without
   4  * modification, are permitted provided that the following conditions
   5  * are met:
   6  * 1. Redistributions of source code must retain the above copyright
   7  *    notice, this list of conditions and the following disclaimer.
   8  * 2. Redistributions in binary form must reproduce the above copyright
   9  *    notice, this list of conditions and the following disclaimer in the
  10  *    documentation and/or other materials provided with the distribution.
  11  *
  12  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  13  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  14  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  15  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
  16  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  17  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  18  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  19  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  20  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  21  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  22  * SUCH DAMAGE.
  23  */
  24
  25 #include <sys/cdefs.h>
  26 __FBSDID("$FreeBSD$");
  27
  28 #include <assert.h>
  29 #include <float.h>
  30 #include <math.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <strings.h>
  34
  35 #include <sys/time.h>
  36 #include <sys/types.h>
  37
  38 #define KASSERT(val, msg) assert(val)
  39
  40 typedef u_int32_t comp_t;
  41
  42 #define AHZ 1000000
  43
  44 #include "convert.c"
  45
  46 static int nerr;
  47
  48 union cf {
  49         comp_t c;
  50         float f;
  51 };
  52
  53 static void
  54 check_result(const char *name, float expected, union cf v)
  55 {
  56         double eps;
  57
  58         eps = fabs(expected - v.f) / expected;
  59         if (eps > FLT_EPSILON) {
  60                 printf("Error in %s\n", name);
  61                 printf("Got      0x%08x %12g\n", v.c, v.f);
  62                 v.f = expected;
  63                 printf("Expected 0x%08x %12g (%.15lg)\n", v.c, v.f, expected);
  64                 printf("Epsilon=%lg, rather than %g\n", eps, FLT_EPSILON);
  65                 nerr++;
  66         }
  67 }
  68
  69 int
  70 main(int argc, char *argv[])
  71 {
  72         union cf v;
  73         long l;
  74         int i, end;
  75         struct timeval tv;
  76
  77         if (argc == 2) {
  78                 /* Loop test */
  79                 end = atoi(argv[1]);
  80                 for (i = 0; i < end; i++) {
  81                         tv.tv_sec = random();
  82                         tv.tv_usec = (random() % 1000000);
  83                         v.c = encode_timeval(tv);
  84                         check_result("encode_timeval",
  85                             (float)tv.tv_sec * AHZ + tv.tv_usec, v);
  86                         l = random();
  87                         v.c = encode_long(l);
  88                         check_result("encode_long", l, v);
  89                 }
  90         } else if (argc == 3) {
  91                 /* Single-value timeval/long test */
  92                 tv.tv_sec = atol(argv[1]);
  93                 tv.tv_usec = atol(argv[2]);
  94                 v.c = encode_timeval(tv);
  95                 check_result("encode_timeval",
  96                     (float)tv.tv_sec * AHZ + tv.tv_usec, v);
  97                 v.c = encode_long(tv.tv_sec);
  98                 check_result("encode_long", tv.tv_sec, v);
  99         } else {
 100                 fprintf(stderr, "usage:\n%s repetitions\n%s sec usec\n",
 101                     argv[0], argv[0]);
 102                 return (1);
 103         }
 104         return (nerr);
 105 }