Annotation of prex-old/usr/lib/libsa/_stdio.c, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 2005-2006, 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: #include <prex/prex.h>
31:
32: extern void (*__cleanup)(void); /* in exit() */
33:
34: static device_t __console_dev;
35:
36: static int init_done = 0;
37:
38: void
39: __stdio_exit(void)
40: {
41:
42: if (__console_dev)
43: device_close(__console_dev);
44: init_done = 0;
45: }
46:
47: static void
48: __stdio_init(void)
49: {
50:
51: device_open("console", 0, &__console_dev);
52: __cleanup = __stdio_exit;
53: init_done = 1;
54: }
55:
56: void
57: __console_write(char *buf, size_t len)
58: {
59:
60: if (init_done == 0)
61: __stdio_init();
62:
63: device_write(__console_dev, buf, &len, 0);
64: }
65:
66: char
67: __console_read(void)
68: {
69: char ch;
70: size_t len = 1;
71:
72: if (init_done == 0)
73: __stdio_init();
74:
75: device_read(__console_dev, &ch, &len, 0);
76: return (int)ch;
77: }
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