tst_byteswap.c revision 9ec53cf4f32cc65e91a9c71651f05a6d872a7088 
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#if EXT2_FLAT_INCLUDES
26#include "ext2_fs.h"
27#else
28#include <linux/ext2_fs.h>
29#endif
30
31#include "ext2fs.h"
32
33__u16 test1[] = {
34	0x0001, 0x0100,
35	0x1234, 0x3412,
36	0xff00, 0x00ff,
37	0x4000, 0x0040,
38	0xfeff, 0xfffe,
39	0x0000, 0x0000
40	};
41
42__u32 test2[] = {
43	0x00000001, 0x01000000,
44	0x80000000, 0x00000080,
45	0x12345678, 0x78563412,
46	0xffff0000, 0x0000ffff,
47	0x00ff0000, 0x0000ff00,
48	0xff000000, 0x000000ff,
49	0x00000000, 0x00000000
50	};
51
52int main(int argc, char *argv)
53{
54	int	i;
55	int	errors = 0;
56
57	printf("Testing ext2fs_swab16\n");
58	i=0;
59	do {
60		printf("swab16(0x%04x) = 0x%04x\n", test1[i],
61		       ext2fs_swab16(test1[i]));
62		if (ext2fs_swab16(test1[i]) != test1[i+1]) {
63			printf("Error!!!   %04x != %04x\n",
64			       ext2fs_swab16(test1[i]), test1[i+1]);
65			errors++;
66		}
67		if (ext2fs_swab16(test1[i+1]) != test1[i]) {
68			printf("Error!!!   %04x != %04x\n",
69			       ext2fs_swab16(test1[i+1]), test1[i]);
70			errors++;
71		}
72		i += 2;
73	} while (test1[i] != 0);
74
75	printf("Testing ext2fs_swab32\n");
76	i = 0;
77	do {
78		printf("swab32(0x%08x) = 0x%08x\n", test2[i],
79		       ext2fs_swab32(test2[i]));
80		if (ext2fs_swab32(test2[i]) != test2[i+1]) {
81			printf("Error!!!   %04x != %04x\n",
82			       ext2fs_swab32(test2[i]), test2[i+1]);
83			errors++;
84		}
85		if (ext2fs_swab32(test2[i+1]) != test2[i]) {
86			printf("Error!!!   %04x != %04x\n",
87			       ext2fs_swab32(test2[i+1]), test2[i]);
88			errors++;
89		}
90		i += 2;
91	} while (test2[i] != 0);
92
93	if (!errors)
94		printf("No errors found in the byteswap implementation!\n");
95
96	return errors;
97}
98