Revert the last two patches to go back to a state before this file was

controversial.


git-svn-id: svn://busybox.net/trunk/busybox@15439 69ca8d6d-28ef-0310-b511-8ec308f3f277

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