Annotation of prex/usr/test/zero/zero.c, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 2005, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: /*
31: * zero.c - test zero device driver.
32: */
33:
34: #include <prex/prex.h>
35: #include <stdio.h>
36: #include <string.h>
37:
38: static char buf[100];
39:
40: void
41: dump_buf(void)
42: {
43: int i;
44:
45: for (i = 0; i < 100; i++)
46: putchar(buf[i]);
47: putchar('\n');
48: }
49:
50: int
51: main(int argc, char *argv[])
52: {
53: device_t zero_dev;
54: int i, err;
55: size_t len;
56:
57: printf("zero test\n");
58:
59: /* 0000000000111111111122222.... */
60: for (i = 0; i < 100; i++)
61: buf[i] = '0' + i / 10;
62: dump_buf();
63:
64: err = device_open("zero", 0, &zero_dev);
65: if (err)
66: printf("device open error!\n");
67:
68: /* zero fill 50 character */
69: len = 50;
70: err = device_read(zero_dev, buf, &len, 0);
71: if (err)
72: printf("device read error!\n");
73:
74: /* 5555555555666666666777... */
75: dump_buf();
76:
77: return 0;
78: }
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