Diff: decodePacket.c

Revision:

1:9399d44c2b1a

Parent:

0:230c10b228ea

--- a/decodePacket.c	Fri Oct 07 13:41:08 2011 +0000
+++ b/decodePacket.c	Fri Oct 07 13:48:18 2011 +0000
@@ -1,32 +1,52 @@
+/**
+ * Rapid-prototyping protection schemes with IEC 61850
+ *
+ * Copyright (c) 2011 Steven Blair
+ * 
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 #include "decodePacket.h"
 //#include "svEncodeBasic.h"
 
 
 // returns size of length field, from first byte
 int getLengthFieldSize(unsigned char byte) {
-	if (byte <= 126) {
-		return 1;
-	}
-	else {
-		return 1 + (byte & 0x7F);
-	}
+    if (byte <= 126) {
+        return 1;
+    }
+    else {
+        return 1 + (byte & 0x7F);
+    }
 }
 
-//TODO	check this works for all inputs, e.g., buf[1] = 0xFF
+//TODO    check this works for all inputs, e.g., buf[1] = 0xFF
 int decodeLength(unsigned char *buf) {
-	if (buf[0] <= 126) {
-		return buf[0];
-	}
-	else {
-		int bytes = (buf[0] & 0x7F);
+    if (buf[0] <= 126) {
+        return buf[0];
+    }
+    else {
+        int bytes = (buf[0] & 0x7F);
 
-		if (bytes == 1) {
-			return buf[1];
-		}
-		else if (bytes == 2) {	// assumes max length of 2^15
-			return ((buf[1] & 0xFF) << 8) | (buf[2] & 0xFF);
-		}
-	}
+        if (bytes == 1) {
+            return buf[1];
+        }
+        else if (bytes == 2) {    // assumes max length of 2^15
+            return ((buf[1] & 0xFF) << 8) | (buf[2] & 0xFF);
+        }
+    }
 
-	return 0;
+    return 0;
 }