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