1 files changed, 71 insertions, 0 deletions
diff --git a/lib/libucsi/atsc/types.c b/lib/libucsi/atsc/types.c
new file mode 100644
index 0000000..8f4b7ea
--- /dev/null
+++ b/lib/libucsi/atsc/types.c
@@ -0,0 +1,71 @@
+/*
+ * section and descriptor parser
+ *
+ * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <string.h>
+#include "libucsi/atsc/types.h"
+
+/* GPS epoch == unix time_t at 06/Jan/1980 */
+#define GPS_EPOCH 315964800
+
+
+int atsc_text_validate(uint8_t *buf, int len)
+{
+	int i;
+	int j;
+	int number_strings;
+	int number_segments;
+	int number_bytes;
+	int pos = 0;
+
+	if (len == 0)
+		return 0;
+	number_strings = buf[pos];
+	pos++;
+
+	for(i=0; i< number_strings; i++) {
+		if (len < (pos+4))
+			return -1;
+		number_segments = buf[pos+3];
+		pos+=4;
+
+		for(j=0; j < number_segments; j++) {
+			if (len < (pos+3))
+				return -1;
+			number_bytes = buf[pos+2];
+			pos+=3;
+
+			if (len < (pos + number_bytes))
+				return -1;
+			pos += number_bytes;
+		}
+	}
+
+	return 0;
+}
+
+time_t atsctime_to_unixtime(atsctime_t atsc)
+{
+	return atsc + GPS_EPOCH;
+}
+
+atsctime_t unixtime_to_atsctime(time_t t)
+{
+	return t - GPS_EPOCH;
+}