From fd6bb20116127f6ac903d4b03abac72a49baa1ae Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Sat, 27 Apr 2019 22:20:21 +0100
Subject: fish

---
 send_data.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 send_data.c

(limited to 'send_data.c')

diff --git a/send_data.c b/send_data.c
new file mode 100644
index 0000000..1e91d4a
--- /dev/null
+++ b/send_data.c
@@ -0,0 +1,93 @@
+/* 
+ * Copyright 1996-2002 - Karl R. Hakimian and David Fries
+ *
+ * This file is part of datalink.
+ *
+ * Datalink 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.
+ *
+ * Datalink 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 datalink (see COPYING); if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <vga.h>
+#include "datalink.h"
+#include "datalink_macros.h"
+
+int send_data(int type, unsigned char **packets, int npckts)
+{
+	int i;
+	register int j;
+	register unsigned char byte;
+	unsigned char white[80];
+	unsigned char black[80];
+	int inc = (type == DATALINK_70) ? 1 : 2;
+
+	for (i = 0; i < 80; i++)
+	{
+		white[i] = 0xff;
+		black[i] = 0x00;
+	}
+
+/* Become root to set vga mode. */
+	seteuid(0);
+	vga_init();
+
+/* This is redundant - vga_init() should do this itself... */
+/* but there's no harm in being sure */
+	seteuid(getuid());
+
+#ifdef MACH64_HACK
+/* For some reason, the latest mach 64 svga driver requires root on the
+   next call even though vga_init gave up root privileges. */
+	seteuid(0);
+#endif
+	vga_setmode(G640x480x2);
+#ifdef MACH64_HACK
+	seteuid(getuid());
+#endif
+
+	SYNC DATASTART for (i = 0; i < npckts; i++)
+	{
+
+		for (j = 0; j <= *packets[i]; j += inc)
+		{
+			vga_waitretrace();
+			byte = packets[i][j];
+			WRITE_BYTE1(1, byte) if (type == DATALINK_70)
+				continue;
+
+			if (j + 1 == packets[i][0])
+				WRITE_BYTE2(0, 0xff)
+				else
+			{
+				byte = packets[i][j + 1];
+			WRITE_BYTE2(1, byte)}
+
+		}
+
+	END_PACKET}
+
+#ifdef MACH64_HACK
+/* For some reason, the latest mach 64 svga driver requires root on the
+   next call even though vga_init gave up root privileges. */
+	seteuid(0);
+#endif
+	vga_setmode(TEXT);
+#ifdef MACH64_HACK
+	seteuid(getuid());
+#endif
+
+	return 0;
+}
-- 
cgit v1.2.3