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

1 files changed, 17 insertions, 141 deletions

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