Reduce test time for main set of decoding tests. Allow the BigComprehensiveTest to be run separately
diff --git a/test/qcbor_decode_tests.h b/test/qcbor_decode_tests.h
index 8a91929..6ba71b4 100644
--- a/test/qcbor_decode_tests.h
+++ b/test/qcbor_decode_tests.h
@@ -138,12 +138,27 @@
 
 
 /*
- Generate all possible input strings up to length x and tries to parse them completely
+ Parses all possible inputs that are two bytes long. Main point
+ is that the test doesn't crash as it doesn't evaluate the
+ input for correctness in any way.
+ 
+ (Parsing all possible 3 byte strings takes too long on all but
+  very fast machines). 
  */
 int ComprehensiveInputTest(void);
 
 
 /*
+ Parses all possible inputs that are four bytes long. Main point
+ is that the test doesn't crash as it doesn't evaluate the
+ input for correctness in any way. This runs very slow, so it
+ is only practical as a once-in-a-while regression test on
+ fast machines.
+ */
+int BigComprehensiveInputTest(void);
+
+
+/*
  Thest the date types -- epoch and strings
  */
 int DateParseTest(void);