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authorGravatar Manuel Novoa III <mjn3@codepoet.org>2003-03-19 09:13:01 +0000
committerGravatar Manuel Novoa III <mjn3@codepoet.org>2003-03-19 09:13:01 +0000
commitcad5364599eb5062d59e0c397ed638ddd61a8d5d (patch)
treea318d0f03aa076c74b576ea45dc543a5669e8e91 /libbb/speed_table.c
parente01f9662a5bd5d91be4f6b3941b57fff73cd5af1 (diff)
downloadbusybox-cad5364599eb5062d59e0c397ed638ddd61a8d5d.tar.gz
busybox-cad5364599eb5062d59e0c397ed638ddd61a8d5d.tar.bz2
Major coreutils update.
Diffstat (limited to 'libbb/speed_table.c')
-rw-r--r--libbb/speed_table.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/libbb/speed_table.c b/libbb/speed_table.c
new file mode 100644
index 000000000..b04429e91
--- /dev/null
+++ b/libbb/speed_table.c
@@ -0,0 +1,130 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * compact speed_t <-> speed functions for busybox
+ *
+ * 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
+ *
+ */
+
+#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
+};
+
+static const int NUM_SPEEDS = (sizeof(speeds) / sizeof(struct speed_map));
+
+unsigned long bb_baud_to_value(speed_t speed)
+{
+ int i = 0;
+
+ 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 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)
+{
+ 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;
+}
+#endif