[fix] conversion_ratio_bits type setted to c_double

hdrh/codec.py

@@ -35,6 +35,7 @@
 from ctypes import c_ushort
 from ctypes import c_uint
 from ctypes import c_ulonglong
+from ctypes import c_double
 
 import zlib
 
@@ -98,7 +99,7 @@ class PayloadHeader(BigEndianStructure):
         ("significant_figures", c_uint),
         ("lowest_trackable_value", c_ulonglong),
         ("highest_trackable_value", c_ulonglong),
-        ("conversion_ratio_bits", c_ulonglong)]
+        ("conversion_ratio_bits", c_double)]
 
 
 payload_header_size = ctypes.sizeof(PayloadHeader)

test/test_hdrhistogram.py

@@ -425,17 +425,17 @@ def check_hist_encode(word_size,
 ENCODE_ARG_LIST = (
     # word size digits  expected_compressed_length, fill_start%, fill_count%
     # best case when all counters are zero
-    (8, 3, 48, 0, 0),        # V1=52 385 = size when compressing entire counts array
-    (8, 2, 48, 0, 0),        # 126
+    (8, 3, 52, 0, 0),        # V1=52 385 = size when compressing entire counts array
+    (8, 2, 52, 0, 0),        # 126
     # typical case when all counters are aggregated in a small contiguous area
-    (8, 3, 15560, 30, 20),   # V1=16452
-    (8, 2, 1688, 30, 20),    # V1=2096
+    (8, 3, 15564, 30, 20),   # V1=16452
+    (8, 2, 1692, 30, 20),    # V1=2096
     # worst case when all counters are different
     (8, 3, 76892, 0, 100),   # V1=80680
-    (8, 2, 9340, 0, 100),    # V1=10744
+    (8, 2, 9344, 0, 100),    # V1=10744
     # worst case 32-bit and 16-bit counters
     (2, 3, 76892, 0, 100),   # V1=68936
-    (2, 2, 9340, 0, 100),    # V1=9144
+    (2, 2, 9344, 0, 100),    # V1=9144
 )
 
 @pytest.mark.codec