--- a/BitDecoder.cpp	Mon Sep 10 19:18:30 2012 +0200
+++ b/BitDecoder.cpp	Mon Sep 10 21:29:43 2012 +0200
@@ -1,5 +1,7 @@
 #include "BitDecoder.hpp"
 
+#include "Exception/InvalidDataException.hpp"
+
 BitDecoder::BitDecoder(BitDecoder* low_in, BitDecoder* high_in) : low(low_in), high(high_in)
 {
 }
@@ -61,3 +63,22 @@
   }
   return retVal;
 }
+
+QBitArray BitDecoder::bitsFromString(const QString& str)
+{
+  QBitArray bits(str.size());
+  for (int i = 0; i < str.size(); ++i) {
+    if (str[i] == '1')
+      bits[i] = true;
+    else if (str[i] == '0')
+      bits[i] = false;
+    else
+      throw InvalidDataException();
+  }
+  return bits;
+}
+
+QString BitDecoder::decode(const QString& bits) const
+{
+  return decode(bitsFromString(bits));
+}