labcomm2014_decode_one now sets the LABCOMM2014_IS_SAMPLE (highest

non-sign bit) when a sample is returned.

lib/c/2014/labcomm2014.h

@@ -30,11 +30,15 @@
 #else
   #include <stdint.h>
   #include <unistd.h>
+  #include <limits.h>
 #endif
 
 #include "labcomm2014_error.h"
 #include "labcomm2014_scheduler.h"
 
+/* Bits set in result of labcomm_decode_one */
+#define LABCOMM2014_IS_SAMPLE (INT_MAX - (INT_MAX>>1))
+
 /* Forward declaration */
 struct labcomm2014_encoder;
 struct labcomm2014_decoder;

lib/c/2014/labcomm2014_decoder.c

@@ -387,7 +387,7 @@ static int do_decode_one(struct labcomm2014_decoder *d)
     DECODER_DEBUG_FPRINTF(stderr, "SKIP %d %d\n", remote_index, length);
     result = decoder_skip(d, length, remote_index);
   } else {
-    result = decode_and_handle(d, d, remote_index);
+    result = decode_and_handle(d, d, remote_index) | LABCOMM2014_IS_SAMPLE;
   }
 out:   
   return result;

lib/c/2014/test/test_labcomm.c

@@ -229,6 +229,11 @@ static void test_encode_decode(struct labcomm2014_encoder *encoder,
 	    writer.pos, expected);
     exit(1);
   }
+  if ((err & LABCOMM2014_IS_SAMPLE) == 0) {
+    fprintf(stderr, "Expected %x set in %x\n",
+	    LABCOMM2014_IS_SAMPLE, err);
+    exit(1);
+  }
 }
 
 static int do_test(int argc, char *argv[])