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authorGravatar Rob Landley <rob@landley.net>2006-06-20 16:17:24 +0000
committerGravatar Rob Landley <rob@landley.net>2006-06-20 16:17:24 +0000
commit57c1f73dd5aaabe22107320e3c21d22ae4313d60 (patch)
treed98ce186c5d5a4f6746f38e637d412aad0b6acdd /libbb/speed_table.c
parent2818b292fb0638a763ee1e5e2cd1a7313afae7c0 (diff)
downloadbusybox-57c1f73dd5aaabe22107320e3c21d22ae4313d60.tar.gz
busybox-57c1f73dd5aaabe22107320e3c21d22ae4313d60.tar.bz2
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.c110
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