Contents of /trunk/mkinitrd-magellan/busybox/libbb/speed_table.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 2047 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * compact speed_t <-> speed functions for busybox |
4 | * |
5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | struct speed_map { |
13 | unsigned short speed; |
14 | unsigned short value; |
15 | }; |
16 | |
17 | static const struct speed_map speeds[] = { |
18 | {B0, 0}, |
19 | {B50, 50}, |
20 | {B75, 75}, |
21 | {B110, 110}, |
22 | {B134, 134}, |
23 | {B150, 150}, |
24 | {B200, 200}, |
25 | {B300, 300}, |
26 | {B600, 600}, |
27 | {B1200, 1200}, |
28 | {B1800, 1800}, |
29 | {B2400, 2400}, |
30 | {B4800, 4800}, |
31 | {B9600, 9600}, |
32 | #ifdef B19200 |
33 | {B19200, 19200}, |
34 | #elif defined(EXTA) |
35 | {EXTA, 19200}, |
36 | #endif |
37 | #ifdef B38400 |
38 | {B38400, 38400/256 + 0x8000U}, |
39 | #elif defined(EXTB) |
40 | {EXTB, 38400/256 + 0x8000U}, |
41 | #endif |
42 | #ifdef B57600 |
43 | {B57600, 57600/256 + 0x8000U}, |
44 | #endif |
45 | #ifdef B115200 |
46 | {B115200, 115200/256 + 0x8000U}, |
47 | #endif |
48 | #ifdef B230400 |
49 | {B230400, 230400/256 + 0x8000U}, |
50 | #endif |
51 | #ifdef B460800 |
52 | {B460800, 460800/256 + 0x8000U}, |
53 | #endif |
54 | #ifdef B921600 |
55 | {B921600, 921600/256 + 0x8000U}, |
56 | #endif |
57 | }; |
58 | |
59 | enum { NUM_SPEEDS = ARRAY_SIZE(speeds) }; |
60 | |
61 | unsigned FAST_FUNC tty_baud_to_value(speed_t speed) |
62 | { |
63 | int i = 0; |
64 | |
65 | do { |
66 | if (speed == speeds[i].speed) { |
67 | if (speeds[i].value & 0x8000U) { |
68 | return ((unsigned long) (speeds[i].value) & 0x7fffU) * 256; |
69 | } |
70 | return speeds[i].value; |
71 | } |
72 | } while (++i < NUM_SPEEDS); |
73 | |
74 | return 0; |
75 | } |
76 | |
77 | speed_t FAST_FUNC tty_value_to_baud(unsigned int value) |
78 | { |
79 | int i = 0; |
80 | |
81 | do { |
82 | if (value == tty_baud_to_value(speeds[i].speed)) { |
83 | return speeds[i].speed; |
84 | } |
85 | } while (++i < NUM_SPEEDS); |
86 | |
87 | return (speed_t) - 1; |
88 | } |
89 | |
90 | #if 0 |
91 | /* testing code */ |
92 | #include <stdio.h> |
93 | |
94 | int main(void) |
95 | { |
96 | unsigned long v; |
97 | speed_t s; |
98 | |
99 | for (v = 0 ; v < 1000000; v++) { |
100 | s = tty_value_to_baud(v); |
101 | if (s == (speed_t) -1) { |
102 | continue; |
103 | } |
104 | printf("v = %lu -- s = %0lo\n", v, (unsigned long) s); |
105 | } |
106 | |
107 | printf("-------------------------------\n"); |
108 | |
109 | for (s = 0 ; s < 010017+1; s++) { |
110 | v = tty_baud_to_value(s); |
111 | if (!v) { |
112 | continue; |
113 | } |
114 | printf("v = %lu -- s = %0lo\n", v, (unsigned long) s); |
115 | } |
116 | |
117 | return 0; |
118 | } |
119 | #endif |