Zadanie3

Encode wygląda okej

Zadanie3

@@ -1,11 +1,43 @@
 from sys import argv
 
-def toString(binaryString):
-    return "".join([chr(int(binaryString[i:i+8],2)) for i in range(0,len(binaryString),8)])
-
 def toBinary(string):
     return "".join([format(ord(char),'#010b')[2:] for char in string])
 
+def binnahex(var):
+    all = {"0000": "0",
+            "0001": "1",
+            "0010": "2",
+            "0011": "3",
+            "0100": "4",
+            "0101": "5",
+            "0110": "6",
+            "0111": "7",
+            "1000": "8",
+            "1001": "9",
+            "1010": "A",
+            "1011": "B",
+            "1100": "C",
+            "1101": "D",
+            "1110": "E",
+            "1111": "F"
+            }
+    i = 0
+    output = ""
+
+    while (len(var) % 4 != 0):
+        var = "0" + var
+
+    while (i < len(var)):
+        output = output + all[var[i:i + 4]]
+        i = i + 4
+
+    output = output.lstrip("0")
+    output = "0" if len(output) == 0 else output
+
+    return output
+
+def toString(binaryString):
+    return "".join([chr(int(binaryString[i:i+8],2)) for i in range(0,len(binaryString),8)])
 
 #XOR
 def xor(a, b):
@@ -73,20 +105,25 @@ def decode(message_final,poly16):
 def encode(message, poly16):
     #konwersja z ascii do binarnego
     aa=toBinary(message)
-
+    a=toString(aa)
     l_poly16 = len(poly16)
- 
+
+    obroc = list(aa)
+    for i in range(l_poly16 - 1):
+        if obroc[i] == "0":
+            obroc[i] = "1"
+        elif obroc[i] == '1':
+            obroc[i] = "0"
+
+    aa = "".join(obroc)
+    
     # Dodajemy n-1 "0" do wiadomosci
-    appended_message = aa + '0'*(l_poly16-1)
+    appended_message =  aa + '0'*(l_poly16-1)
     remainder = divide(appended_message, poly16)
- 
-    message_final = aa + remainder
-    print("binarnie calosc : ", message_final)
-    #konwersja z binarnego do ascii
-    ab=toString(message_final)
-    print("w ascii : ", ab)
-    print("sprawdzenie : ")
-    decode(message_final, poly16)
+    ab=binnahex(remainder)
+    message_final = a + ab
+    print("calosc : ", message_final)
+    print("crc : ", ab)