[PATCH 6/6] bitset: tests: exercise the stats too

[Akim Demaille]

* tests/test-bitset.c: Display the stats at the end of the test.
* lib/bitset/stats.c (bitset_log_histogram_print): When diplaying the
last bin, display "256-..." rather that "256-511", since the last bin
does count item greater than or equal to 256.
---
 ChangeLog           | 9 +++++++++
 lib/bitset/stats.c  | 8 +++++++-
 tests/test-bitset.c | 4 ++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index cd595f41d..55c4e08e8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2020-11-19  Akim Demaille  <akim@lrde.epita.fr>
+
+       bitset: tests: exercise the stats too
+
+       * tests/test-bitset.c: Display the stats at the end of the test.
+       * lib/bitset/stats.c (bitset_log_histogram_print): When diplaying the
+       last bin, display "256-..." rather that "256-511", since the last bin
+       does count item greater than or equal to 256.
+
 2020-11-19  Akim Demaille  <akim@lrde.epita.fr>
 
        bitset: tests: try harder to break it
diff --git a/lib/bitset/stats.c b/lib/bitset/stats.c
index 5bd44c06a..df9264285 100644
--- a/lib/bitset/stats.c
+++ b/lib/bitset/stats.c
@@ -154,13 +154,19 @@ bitset_log_histogram_print (FILE *file, const char *name, 
const char *msg,
       fprintf (file, "%*d\t%8u (%5.1f%%)\n",
                max_width, i, bins[i], 100.0 * bins[i] / total);
 
-    for (; i < n_bins; i++)
+    for (; i < n_bins - 1; i++)
       fprintf (file, "%*lu-%lu\t%8u (%5.1f%%)\n",
                max_width - ((unsigned) (0.30103 * (i) + 0.9999) + 1),
                1UL << (i - 1),
                (1UL << i) - 1,
                bins[i],
                (100.0 * bins[i]) / total);
+
+    fprintf (file, "%*lu-...\t%8u (%5.1f%%)\n",
+             max_width - ((unsigned) (0.30103 * (i) + 0.9999) + 1),
+             1UL << (i - 1),
+             bins[i],
+             (100.0 * bins[i]) / total);
   }
 }
 
diff --git a/tests/test-bitset.c b/tests/test-bitset.c
index 9a2d7c521..6fa656a22 100644
--- a/tests/test-bitset.c
+++ b/tests/test-bitset.c
@@ -358,6 +358,8 @@ check_attributes (enum bitset_attr attr, int nbits)
 
 int main (void)
 {
+  bitset_stats_enable ();
+
   for (int i = 0; i < 4; ++i)
     {
       /* table bitsets have elements that store 256 bits.  bitset_list
@@ -382,5 +384,7 @@ int main (void)
   compare (BITSET_VARIABLE, BITSET_SPARSE);
   compare (BITSET_VARIABLE, BITSET_FRUGAL);
   compare (BITSET_VARIABLE, BITSET_GREEDY);
+
+  bitset_stats_dump (stderr);
   return 0;
 }
-- 
2.29.2