lib/ext2fs/tst_byteswap.c

   1 /*
   2  * This testing program makes sure the byteswap functions work
   3  *
   4  * Copyright (C) 2000 by Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Library
   8  * General Public License, version 2.
   9  * %End-Header%
  10  */
  11
  12 #include "config.h"
  13 #include <stdio.h>
  14 #include <string.h>
  15 #if HAVE_UNISTD_H
  16 #include <unistd.h>
  17 #endif
  18 #include <fcntl.h>
  19 #include <time.h>
  20 #include <sys/stat.h>
  21 #include <sys/types.h>
  22 #if HAVE_ERRNO_H
  23 #include <errno.h>
  24 #endif
  25
  26 #include "ext2_fs.h"
  27 #include "ext2fs.h"
  28
  29 __u16 test1[] = {
  30         0x0001, 0x0100,
  31         0x1234, 0x3412,
  32         0xff00, 0x00ff,
  33         0x4000, 0x0040,
  34         0xfeff, 0xfffe,
  35         0x0000, 0x0000
  36         };
  37
  38 __u32 test2[] = {
  39         0x00000001, 0x01000000,
  40         0x80000000, 0x00000080,
  41         0x12345678, 0x78563412,
  42         0xffff0000, 0x0000ffff,
  43         0x00ff0000, 0x0000ff00,
  44         0xff000000, 0x000000ff,
  45         0x00000000, 0x00000000
  46         };
  47
  48 int main(int argc, char **argv)
  49 {
  50         int     i;
  51         int     errors = 0;
  52
  53         printf("Testing ext2fs_swab16\n");
  54         i=0;
  55         do {
  56                 printf("swab16(0x%04x) = 0x%04x\n", test1[i],
  57                        ext2fs_swab16(test1[i]));
  58                 if (ext2fs_swab16(test1[i]) != test1[i+1]) {
  59                         printf("Error!!!   %04x != %04x\n",
  60                                ext2fs_swab16(test1[i]), test1[i+1]);
  61                         errors++;
  62                 }
  63                 if (ext2fs_swab16(test1[i+1]) != test1[i]) {
  64                         printf("Error!!!   %04x != %04x\n",
  65                                ext2fs_swab16(test1[i+1]), test1[i]);
  66                         errors++;
  67                 }
  68                 i += 2;
  69         } while (test1[i] != 0);
  70
  71         printf("Testing ext2fs_swab32\n");
  72         i = 0;
  73         do {
  74                 printf("swab32(0x%08x) = 0x%08x\n", test2[i],
  75                        ext2fs_swab32(test2[i]));
  76                 if (ext2fs_swab32(test2[i]) != test2[i+1]) {
  77                         printf("Error!!!   %04x != %04x\n",
  78                                ext2fs_swab32(test2[i]), test2[i+1]);
  79                         errors++;
  80                 }
  81                 if (ext2fs_swab32(test2[i+1]) != test2[i]) {
  82                         printf("Error!!!   %04x != %04x\n",
  83                                ext2fs_swab32(test2[i+1]), test2[i]);
  84                         errors++;
  85                 }
  86                 i += 2;
  87         } while (test2[i] != 0);
  88
  89         if (!errors)
  90                 printf("No errors found in the byteswap implementation!\n");
  91
  92         return errors;
  93 }