octal in scanner

Scanning.py

@@ -304,16 +304,33 @@ def JoosTransition(input, state):
     elif (state == 'STRINGESC'):
         if input == 'u':
             return 'UNICODE' #going to be discarded
+        if input.isdigit() and  0  <= int(input) <= 7:
+            return 'LSTRING'
         if input not in ('n', 'r', 't', 'v', '\\','\'', '"', '?', 'b' ):
             return None
         return 'LSTRING'
 
+    elif(state == 'CHAROCTAVEESC'):
+        if input.isdigit() and  0 <= int(input) <= 7:
+            return 'CHAROCTAVEESC1'
+        if (input == '\''):
+            return 'LITERALCHAR'
+        return None
+    elif(state == 'CHAROCTAVEESC1'):
+        if input.isdigit() and  0 <= int(input) <= 7:
+            return 'CHAREND'
+        if (input == '\''):
+            return 'LITERALCHAR'
+        return None
+
     # char literal
     elif (state == 'LCHAR'):
         if (input == '\\'):
             return 'CHARESC'
         return 'CHAREND'
     elif (state == 'CHARESC'):
+        if input.isdigit() and  0 <= int(input) <= 7:
+            return 'CHAROCTAVEESC'
         if input not in ('n', 'r', 't', 'v', '\\','\'', '"', '?', 'b' ):
             return None
         return 'CHAREND'
@@ -452,7 +469,9 @@ def SMM(input, dfa):
         if (state in dfa.accept):
             scanned.append(Token(state, seenInput))
         else:
-            return (None, ord(input[0]))
+            if input:
+                m = ord(input[0])
+                return (None, m)
 
     return (scanned, "success")