diff options
author | Rob Landley <rob@landley.net> | 2006-06-20 20:17:24 +0400 |
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committer | Rob Landley <rob@landley.net> | 2006-06-20 20:17:24 +0400 |
commit | 57c1f73dd5aaabe22107320e3c21d22ae4313d60 (patch) | |
tree | d98ce186c5d5a4f6746f38e637d412aad0b6acdd /libbb/speed_table.c | |
parent | 2818b292fb0638a763ee1e5e2cd1a7313afae7c0 (diff) |
Revert the last two patches to go back to a state before this file was
controversial.
Diffstat (limited to 'libbb/speed_table.c')
-rw-r--r-- | libbb/speed_table.c | 110 |
1 files changed, 94 insertions, 16 deletions
diff --git a/libbb/speed_table.c b/libbb/speed_table.c index d6073f12f..d690d55dc 100644 --- a/libbb/speed_table.c +++ b/libbb/speed_table.c @@ -7,33 +7,111 @@ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ +#include <termios.h> #include "libbb.h" -static const unsigned short speeds[] = { - 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, - 19200, 38400, 57600>>8, 115200>>8, 230400>>8, 460800>>8, 500000>>8, - 576000>>8, 921600>>8, 1000000>>8, 1152000>>8, 1500000>>8, 2000000>>8, - 3000000>>8, 3500000>>8, 4000000>>8 +struct speed_map { + unsigned short speed; + unsigned short value; }; -unsigned int tty_baud_to_value(speed_t speed) +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 +}; + +enum { NUM_SPEEDS = (sizeof(speeds) / sizeof(struct speed_map)) }; + +unsigned long bb_baud_to_value(speed_t speed) { - int i; + int i = 0; - for (i=0; i<sizeof(speeds) / sizeof(*speeds); i++) - if (speed == speeds[i] * (i>15 ? 256 : 1)) - return i>15 ? (i+4096-14) : i; + 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 tty_value_to_baud(unsigned int value) +speed_t bb_value_to_baud(unsigned long value) +{ + int i = 0; + + do { + if (value == bb_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) { - int i; + unsigned long v; + speed_t s; - for (i=0; i<sizeof(speeds) / sizeof(*speeds); i++) - if (value == (i>15 ? (i+4096-14) : i)) - return speeds[i] * (i>15 ? 256 : 1); + for (v = 0 ; v < 500000 ; v++) { + s = bb_value_to_baud(v); + if (s == (speed_t) -1) { + continue; + } + printf("v = %lu -- s = %0lo\n", v, (unsigned long) s); + } - return -1; + printf("-------------------------------\n"); + + for (s = 0 ; s < 010017+1 ; s++) { + v = bb_baud_to_value(s); + if (!v) { + continue; + } + printf("v = %lu -- s = %0lo\n", v, (unsigned long) s); + } + + return 0; } +#endif |