From b8a923877f07cce32ebc0c428d98f734d2b452d3 Mon Sep 17 00:00:00 2001
From: Klaudia Kandulska <klakan1@st.amu.edu.pl>
Date: Wed, 27 Jun 2018 23:07:44 +0000
Subject: [PATCH] Update 'Zadanie3'

---
 Zadanie3 | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/Zadanie3 b/Zadanie3
index 1de6255..dc531f5 100644
--- a/Zadanie3
+++ b/Zadanie3
@@ -86,10 +86,22 @@ def divide(message, poly16):
     return check
 
 
-def decode(message_final,poly16):
+def decode(message_final,poly16,crc):
     l_poly16 = len(poly16)
-    appended_message2 = message_final
-    remainder = divide(appended_message2, poly16)
+    appended_message2 = toBinary(message_final)
+    obroc = list(appended_message2)
+    for i in range(l_poly16 - 1):
+        if obroc[i] == "0":
+            obroc[i] = "1"
+        elif obroc[i] == '1':
+            obroc[i] = "0"
+
+    appended_message2 = "".join(obroc)
+    
+    dec = int(crc, 16)
+    crc2=bin(dec)[2:]
+    msg=appended_message2+crc2
+    remainder = divide(msg, poly16)
     #Poprawione sprawdzanie
     suma = 0
     for i in range(0, len(remainder)):
@@ -101,6 +113,7 @@ def decode(message_final,poly16):
     elif suma > 0:
         print("false")
 
+
  
 def encode(message, poly16):
     #konwersja z ascii do binarnego
@@ -135,6 +148,8 @@ def main():
     flag = argv[2] 
     if flag == 'encode':
         encode(message, poly16)
-    
+    elif flag == 'decode':
+        crc = argv[3] 
+        decode(message, poly16,crc)    
 if __name__ == '__main__':
     main()