mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
120 lines
2.0 KiB
C
120 lines
2.0 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* compact speed_t <-> speed functions for busybox
|
|
*
|
|
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
struct speed_map {
|
|
unsigned short speed;
|
|
unsigned short value;
|
|
};
|
|
|
|
static const struct speed_map speeds[] = {
|
|
{B0, 0},
|
|
{B50, 50},
|
|
{B75, 75},
|
|
{B110, 110},
|
|
{B134, 134},
|
|
{B150, 150},
|
|
{B200, 200},
|
|
{B300, 300},
|
|
{B600, 600},
|
|
{B1200, 1200},
|
|
{B1800, 1800},
|
|
{B2400, 2400},
|
|
{B4800, 4800},
|
|
{B9600, 9600},
|
|
#ifdef B19200
|
|
{B19200, 19200},
|
|
#elif defined(EXTA)
|
|
{EXTA, 19200},
|
|
#endif
|
|
#ifdef B38400
|
|
{B38400, 38400/256 + 0x8000U},
|
|
#elif defined(EXTB)
|
|
{EXTB, 38400/256 + 0x8000U},
|
|
#endif
|
|
#ifdef B57600
|
|
{B57600, 57600/256 + 0x8000U},
|
|
#endif
|
|
#ifdef B115200
|
|
{B115200, 115200/256 + 0x8000U},
|
|
#endif
|
|
#ifdef B230400
|
|
{B230400, 230400/256 + 0x8000U},
|
|
#endif
|
|
#ifdef B460800
|
|
{B460800, 460800/256 + 0x8000U},
|
|
#endif
|
|
#ifdef B921600
|
|
{B921600, 921600/256 + 0x8000U},
|
|
#endif
|
|
};
|
|
|
|
enum { NUM_SPEEDS = ARRAY_SIZE(speeds) };
|
|
|
|
unsigned FAST_FUNC tty_baud_to_value(speed_t speed)
|
|
{
|
|
int i = 0;
|
|
|
|
do {
|
|
if (speed == speeds[i].speed) {
|
|
if (speeds[i].value & 0x8000U) {
|
|
return ((unsigned long) (speeds[i].value) & 0x7fffU) * 256;
|
|
}
|
|
return speeds[i].value;
|
|
}
|
|
} while (++i < NUM_SPEEDS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
speed_t FAST_FUNC tty_value_to_baud(unsigned int value)
|
|
{
|
|
int i = 0;
|
|
|
|
do {
|
|
if (value == tty_baud_to_value(speeds[i].speed)) {
|
|
return speeds[i].speed;
|
|
}
|
|
} while (++i < NUM_SPEEDS);
|
|
|
|
return (speed_t) - 1;
|
|
}
|
|
|
|
#if 0
|
|
/* testing code */
|
|
#include <stdio.h>
|
|
|
|
int main(void)
|
|
{
|
|
unsigned long v;
|
|
speed_t s;
|
|
|
|
for (v = 0 ; v < 1000000; v++) {
|
|
s = tty_value_to_baud(v);
|
|
if (s == (speed_t) -1) {
|
|
continue;
|
|
}
|
|
printf("v = %lu -- s = %0lo\n", v, (unsigned long) s);
|
|
}
|
|
|
|
printf("-------------------------------\n");
|
|
|
|
for (s = 0 ; s < 010017+1; s++) {
|
|
v = tty_baud_to_value(s);
|
|
if (!v) {
|
|
continue;
|
|
}
|
|
printf("v = %lu -- s = %0lo\n", v, (unsigned long) s);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|