source: branches/2.2.2/mindi-busybox/libbb/speed_table.c @ 1247

Last change on this file since 1247 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 2.0 KB
Line 
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 <termios.h>
11#include "libbb.h"
12
13struct speed_map {
14    unsigned short speed;
15    unsigned short value;
16};
17
18static const struct speed_map speeds[] = {
19    {B0, 0},
20    {B50, 50},
21    {B75, 75},
22    {B110, 110},
23    {B134, 134},
24    {B150, 150},
25    {B200, 200},
26    {B300, 300},
27    {B600, 600},
28    {B1200, 1200},
29    {B1800, 1800},
30    {B2400, 2400},
31    {B4800, 4800},
32    {B9600, 9600},
33#ifdef  B19200
34    {B19200, 19200},
35#elif defined(EXTA)
36    {EXTA, 19200},
37#endif
38#ifdef  B38400
39    {B38400, 38400/256 + 0x8000U},
40#elif defined(EXTB)
41    {EXTB, 38400/256 + 0x8000U},
42#endif
43#ifdef B57600
44    {B57600, 57600/256 + 0x8000U},
45#endif
46#ifdef B115200
47    {B115200, 115200/256 + 0x8000U},
48#endif
49#ifdef B230400
50    {B230400, 230400/256 + 0x8000U},
51#endif
52#ifdef B460800
53    {B460800, 460800/256 + 0x8000U},
54#endif
55};
56
57enum { NUM_SPEEDS = (sizeof(speeds) / sizeof(struct speed_map)) };
58
59unsigned int tty_baud_to_value(speed_t speed)
60{
61    int i = 0;
62
63    do {
64        if (speed == speeds[i].speed) {
65            if (speeds[i].value & 0x8000U) {
66                return ((unsigned long) (speeds[i].value) & 0x7fffU) * 256;
67            }
68            return speeds[i].value;
69        }
70    } while (++i < NUM_SPEEDS);
71
72    return 0;
73}
74
75speed_t tty_value_to_baud(unsigned int value)
76{
77    int i = 0;
78
79    do {
80        if (value == tty_baud_to_value(speeds[i].speed)) {
81            return speeds[i].speed;
82        }
83    } while (++i < NUM_SPEEDS);
84
85    return (speed_t) - 1;
86}
87
88#if 0
89/* testing code */
90#include <stdio.h>
91
92int main(void)
93{
94    unsigned long v;
95    speed_t s;
96
97    for (v = 0 ; v < 500000 ; v++) {
98        s = tty_value_to_baud(v);
99        if (s == (speed_t) -1) {
100            continue;
101        }
102        printf("v = %lu -- s = %0lo\n", v, (unsigned long) s);
103    }
104
105    printf("-------------------------------\n");
106
107    for (s = 0 ; s < 010017+1 ; s++) {
108        v = tty_baud_to_value(s);
109        if (!v) {
110            continue;
111        }
112        printf("v = %lu -- s = %0lo\n", v, (unsigned long) s);
113    }
114
115    return 0;
116}
117#endif
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