tests/lib/libc/string/t_swab.c

   1 /*      $NetBSD: t_swab.c,v 1.2 2011/07/07 08:27:36 jruoho Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code was contributed to The NetBSD Foundation by Christos Zoulas.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30 #include <atf-c.h>
  31
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <unistd.h>
  36
  37 #include <err.h>
  38
  39 #define MAXCHK  100
  40
  41 static void
  42 build(char *a, char *b, size_t n) {
  43         size_t i;
  44
  45         n >>= 1;
  46         for (i = 0; i < n; i += 2) {
  47                 b[i+1] = a[i] = (char)i;
  48                 b[i] = a[i+1] = (char)(i+1);
  49         }
  50         for (n <<= 1; n < MAXCHK; n++)
  51                 a[n] = b[n] = (char)~0;
  52 }
  53
  54 static void
  55 dump(const char *f, char *b, size_t l)
  56 {
  57
  58         printf("%s ", f);
  59         while (l--)
  60                 printf("%.2x ", (unsigned char)*b++);
  61         printf("\n");
  62 }
  63
  64 ATF_TC(swab_basic);
  65 ATF_TC_HEAD(swab_basic, tc)
  66 {
  67
  68         atf_tc_set_md_var(tc, "descr", "Test swab results");
  69 }
  70
  71 ATF_TC_BODY(swab_basic, tc)
  72 {
  73         char a[MAXCHK], b[MAXCHK], r[MAXCHK];
  74         size_t i;
  75
  76         for (i = 0; i < MAXCHK; i += 2) {
  77                 build(a, b, i);
  78                 (void)memset(r, ~0, MAXCHK);
  79                 swab(a, r, i);
  80                 if (memcmp(b, r, MAXCHK) != 0) {
  81                         fprintf(stderr, "pattern mismatch at %lu bytes",
  82                             (unsigned long)i);
  83                         dump("expect:", b, MAXCHK);
  84                         dump("result:", r, MAXCHK);
  85                         atf_tc_fail("Check stderr for details");
  86                 }
  87         }
  88 }
  89
  90 ATF_TP_ADD_TCS(tp)
  91 {
  92         ATF_TP_ADD_TC(tp, swab_basic);
  93
  94         return atf_no_error();
  95 }