Add libteken (from FreeBSD) to third_party.

third_party/libteken/teken/teken_subr_compat.h

Index: third_party/libteken/teken/teken_subr_compat.h
diff --git a/third_party/libteken/teken/teken_subr_compat.h b/third_party/libteken/teken/teken_subr_compat.h
new file mode 100644
index 0000000000000000000000000000000000000000..826a8544c416d33e5c7b3ed977abd1c84b425ca0
--- /dev/null
+++ b/third_party/libteken/teken/teken_subr_compat.h
@@ -0,0 +1,126 @@
+/*-
+ * Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: head/sys/teken/teken_subr_compat.h 214817 2010-11-05 00:56:21Z ed $
+ */
+
+static void
+teken_subr_cons25_set_cursor_type(teken_t *t, unsigned int type)
+{
+
+	teken_funcs_param(t, TP_SHOWCURSOR, type != 1);
+}
+
+static const teken_color_t cons25_colors[8] = { TC_BLACK, TC_BLUE,
+    TC_GREEN, TC_CYAN, TC_RED, TC_MAGENTA, TC_BROWN, TC_WHITE };
+
+static void
+teken_subr_cons25_set_adapter_background(teken_t *t, unsigned int c)
+{
+
+	t->t_defattr.ta_bgcolor = cons25_colors[c % 8];
+	t->t_curattr.ta_bgcolor = cons25_colors[c % 8];
+}
+
+static void
+teken_subr_cons25_set_adapter_foreground(teken_t *t, unsigned int c)
+{
+
+	t->t_defattr.ta_fgcolor = cons25_colors[c % 8];
+	t->t_curattr.ta_fgcolor = cons25_colors[c % 8];
+	if (c >= 8) {
+		t->t_defattr.ta_format |= TF_BOLD;
+		t->t_curattr.ta_format |= TF_BOLD;
+	} else {
+		t->t_defattr.ta_format &= ~TF_BOLD;
+		t->t_curattr.ta_format &= ~TF_BOLD;
+	}
+}
+
+static const teken_color_t cons25_revcolors[8] = { 0, 4, 2, 6, 1, 5, 3, 7 };
+
+void
+teken_get_defattr_cons25(teken_t *t, int *fg, int *bg)
+{
+
+	*fg = cons25_revcolors[teken_256to8(t->t_defattr.ta_fgcolor)];
+	if (t->t_defattr.ta_format & TF_BOLD)
+		*fg += 8;
+	*bg = cons25_revcolors[teken_256to8(t->t_defattr.ta_bgcolor)];
+}
+
+static void
+teken_subr_cons25_switch_virtual_terminal(teken_t *t, unsigned int vt)
+{
+
+	teken_funcs_param(t, TP_SWITCHVT, vt);
+}
+
+static void
+teken_subr_cons25_set_bell_pitch_duration(teken_t *t, unsigned int pitch,
+    unsigned int duration)
+{
+
+	teken_funcs_param(t, TP_SETBELLPD, (pitch << 16) |
+	    (duration & 0xffff));
+}
+
+static void
+teken_subr_cons25_set_graphic_rendition(teken_t *t, unsigned int cmd,
+    unsigned int param __unused)
+{
+
+	switch (cmd) {
+	case 0: /* Reset. */
+		t->t_curattr = t->t_defattr;
+		break;
+	default:
+		teken_printf("unsupported attribute %u\n", cmd);
+	}
+}
+
+static void
+teken_subr_cons25_set_terminal_mode(teken_t *t, unsigned int mode)
+{
+
+	switch (mode) {
+	case 0:	/* Switch terminal to xterm. */
+		t->t_stateflags &= ~TS_CONS25;
+		break;
+	case 1: /* Switch terminal to cons25. */
+		t->t_stateflags |= TS_CONS25;
+		break;
+	}
+}
+
+#if 0
+static void
+teken_subr_vt52_decid(teken_t *t)
+{
+	const char response[] = "\x1B/Z";
+
+	teken_funcs_respond(t, response, sizeof response - 1);
+}
+#endif