tst_byteswap.c revision 9f8046fc6dfc13eee2f5c363214e60b533872cac 
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
47int 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}
93