Undo all of the ugliness and some of the bloat from 15412.

git-svn-id: svn://busybox.net/trunk/busybox@15421 69ca8d6d-28ef-0310-b511-8ec308f3f277

4 files changed, 22 insertions, 146 deletions

diff --git a/coreutils/stty.c b/coreutils/stty.c
index cfb7f7f39..b78368e7b 100644
--- a/coreutils/stty.c
+++ b/coreutils/stty.c
@@ -1190,7 +1190,7 @@ static void display_speed(struct termios *mode, int fancy)
         if (fancy) {
                 fmt_str += 9;
         }
-        wrapf(fmt_str, bb_baud_to_value(ispeed), bb_baud_to_value(ospeed));
+        wrapf(fmt_str, tty_baud_to_value(ispeed), tty_baud_to_value(ospeed));
         if (!fancy)
                 current_col = 0;
 }
@@ -1239,7 +1239,7 @@ static int recover_mode(char *arg, struct termios *mode)
 
 static speed_t string_to_baud(const char *arg)
 {
-        return bb_value_to_baud(bb_xparse_number(arg, 0));
+        return tty_value_to_baud(bb_xparse_number(arg, 0));
 }
 
 static void sane_mode(struct termios *mode)
diff --git a/include/libbb.h b/include/libbb.h
index e9d7e7596..bc886dab9 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -140,8 +140,8 @@ extern int recursive_action(const char *fileName, int recurse,
 extern int bb_parse_mode( const char* s, mode_t* theMode);
 extern long bb_xgetlarg(const char *arg, int base, long lower, long upper);
 
-extern unsigned long bb_baud_to_value(speed_t speed);
-extern speed_t bb_value_to_baud(unsigned long value);
+extern unsigned int tty_baud_to_value(speed_t speed);
+extern speed_t tty_value_to_baud(unsigned int value);
 
 extern int get_linux_version_code(void);
 
diff --git a/libbb/speed_table.c b/libbb/speed_table.c
index b4d576b4c..d6073f12f 100644
--- a/libbb/speed_table.c
+++ b/libbb/speed_table.c
@@ -4,160 +4,36 @@
  *
  * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <termios.h>
 #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 B500000
-        {B500000, 500000/256 + 0x8000U},
-#endif
-#ifdef B576000
-        {B576000, 576000/256 + 0x8000U},
-#endif
-#ifdef B921600
-        {B921600, 921600/256 + 0x8000U},
-#endif
-#ifdef B1000000
-        {B1000000, 1000000/256 + 0x8000U},
-#endif
-#ifdef B1152000
-        {B1152000, 1152000/256 + 0x8000U},
-#endif
-#ifdef B1500000
-        {B1500000, 1500000/256 + 0x8000U},
-#endif
-#ifdef B2000000
-        {B2000000, 2000000/256 + 0x8000U},
-#endif
-#ifdef B2500000
-        {B2500000, 2500000/256 + 0x8000U},
-#endif
-#ifdef B3000000
-        {B3000000, 3000000/256 + 0x8000U},
-#endif
-#ifdef B3500000
-        {B3500000, 3500000/256 + 0x8000U},
-#endif
-#ifdef B4000000
-        {B4000000, 4000000/256 + 0x8000U},
-#endif
+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
 };
 
-enum { NUM_SPEEDS = (sizeof(speeds) / sizeof(struct speed_map)) };
-
-unsigned long bb_baud_to_value(speed_t speed)
+unsigned int tty_baud_to_value(speed_t speed)
 {
-        int i = 0;
+        int 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);
+        for (i=0; i<sizeof(speeds) / sizeof(*speeds); i++)
+                if (speed == speeds[i] * (i>15 ? 256 : 1))
+                        return i>15 ? (i+4096-14) : i;
 
         return 0;
 }
 
-speed_t bb_value_to_baud(unsigned long value)
+speed_t tty_value_to_baud(unsigned int value)
 {
-        int i = 0;
+        int i;
 
-        do {
-                if (value == bb_baud_to_value(speeds[i].speed)) {
-                        return speeds[i].speed;
-                }
-        } while (++i < NUM_SPEEDS);
-
-        return (speed_t) - 1;
-}
+        for (i=0; i<sizeof(speeds) / sizeof(*speeds); i++)
+                if (value == (i>15 ? (i+4096-14) : i))
+                        return speeds[i] * (i>15 ? 256 : 1);
 
-#if 0
-/* testing code */
-#include <stdio.h>
-
-int main(void)
-{
-        unsigned long v;
-        speed_t s;
-
-        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);
-        }
-
-        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;
+        return -1;
 }
-#endif
diff --git a/loginutils/getty.c b/loginutils/getty.c
index 11eb5a050..e68f2cde1 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -287,7 +287,7 @@ static int bcode(const char *s)
         if (safe_strtoul((char *)s, &value)) {
                 return -1;
         }
-        if ((r = bb_value_to_baud(value)) > 0) {
+        if ((r = tty_value_to_baud(value)) > 0) {
                 return r;
         }
         return 0;