Vendor go-serial.

vendor/github.com/mikepb/go-serial/linux_termios.c

@@ -0,0 +1,132 @@
+/*
+ * This file is part of the libserialport project.
+ *
+ * Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 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 Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * At the time of writing, glibc does not support the Linux kernel interfaces
+ * for setting non-standard baud rates and flow control. We therefore have to
+ * prepare the correct ioctls ourselves, for which we need the declarations in
+ * linux/termios.h.
+ *
+ * We can't include linux/termios.h in serialport.c however, because its
+ * contents conflict with the termios.h provided by glibc. So this file exists
+ * to isolate the bits of code which use the kernel termios declarations.
+ *
+ * The details vary by architecture. Some architectures have c_ispeed/c_ospeed
+ * in struct termios, accessed with TCSETS/TCGETS. Others have these fields in
+ * struct termios2, accessed with TCSETS2/TCGETS2. Some architectures have the
+ * TCSETX/TCGETX ioctls used with struct termiox, others do not.
+ */
+
+#ifdef __linux__
+
+#include <stdlib.h>
+#include <linux/termios.h>
+#include "linux_termios.h"
+
+SP_PRIV unsigned long get_termios_get_ioctl(void)
+{
+#ifdef HAVE_TERMIOS2
+	return TCGETS2;
+#else
+	return TCGETS;
+#endif
+}
+
+SP_PRIV unsigned long get_termios_set_ioctl(void)
+{
+#ifdef HAVE_TERMIOS2
+	return TCSETS2;
+#else
+	return TCSETS;
+#endif
+}
+
+SP_PRIV size_t get_termios_size(void)
+{
+#ifdef HAVE_TERMIOS2
+	return sizeof(struct termios2);
+#else
+	return sizeof(struct termios);
+#endif
+}
+
+#if (defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)) && defined(HAVE_BOTHER)
+SP_PRIV int get_termios_speed(void *data)
+{
+#ifdef HAVE_TERMIOS2
+	struct termios2 *term = (struct termios2 *) data;
+#else
+	struct termios *term = (struct termios *) data;
+#endif
+	if (term->c_ispeed != term->c_ospeed)
+		return -1;
+	else
+		return term->c_ispeed;
+}
+
+SP_PRIV void set_termios_speed(void *data, int speed)
+{
+#ifdef HAVE_TERMIOS2
+	struct termios2 *term = (struct termios2 *) data;
+#else
+	struct termios *term = (struct termios *) data;
+#endif
+	term->c_cflag &= ~CBAUD;
+	term->c_cflag |= BOTHER;
+	term->c_ispeed = term->c_ospeed = speed;
+}
+#endif
+
+#ifdef HAVE_TERMIOX
+SP_PRIV size_t get_termiox_size(void)
+{
+	return sizeof(struct termiox);
+}
+
+SP_PRIV int get_termiox_flow(void *data, int *rts, int *cts, int *dtr, int *dsr)
+{
+	struct termiox *termx = (struct termiox *) data;
+	int flags = 0;
+
+	*rts = (termx->x_cflag & RTSXOFF);
+	*cts = (termx->x_cflag & CTSXON);
+	*dtr = (termx->x_cflag & DTRXOFF);
+	*dsr = (termx->x_cflag & DSRXON);
+
+	return flags;
+}
+
+SP_PRIV void set_termiox_flow(void *data, int rts, int cts, int dtr, int dsr)
+{
+	struct termiox *termx = (struct termiox *) data;
+
+	termx->x_cflag &= ~(RTSXOFF | CTSXON | DTRXOFF | DSRXON);
+
+	if (rts)
+		termx->x_cflag |= RTSXOFF;
+	if (cts)
+		termx->x_cflag |= CTSXON;
+	if (dtr)
+		termx->x_cflag |= DTRXOFF;
+	if (dsr)
+		termx->x_cflag |= DSRXON;
+}
+#endif
+
+#endif