Add support for rejecting values larger than the max trackable value. #126.

Author: mikeb01

src/hdr_histogram.c

@@ -341,10 +341,10 @@ static int32_t buckets_needed_to_cover_value(int64_t value, int32_t sub_bucket_c
 /* ##     ## ######## ##     ##  #######  ##     ##    ##    */
 
 int hdr_calculate_bucket_config(
-        int64_t lowest_discernible_value,
-        int64_t highest_trackable_value,
-        int significant_figures,
-        struct hdr_histogram_bucket_config* cfg)
+    int64_t lowest_discernible_value,
+    int64_t highest_trackable_value,
+    int significant_figures,
+    struct hdr_histogram_bucket_config* cfg)
 {
     int32_t sub_bucket_count_magnitude;
     int64_t largest_value_with_single_unit_resolution;
@@ -406,10 +406,10 @@ void hdr_init_preallocated(struct hdr_histogram* h, struct hdr_histogram_bucket_
 }
 
 int hdr_init(
-        int64_t lowest_discernible_value,
-        int64_t highest_trackable_value,
-        int significant_figures,
-        struct hdr_histogram** result)
+    int64_t lowest_discernible_value,
+    int64_t highest_trackable_value,
+    int significant_figures,
+    struct hdr_histogram** result)
 {
     int64_t* counts;
     struct hdr_histogram_bucket_config cfg;
@@ -492,13 +492,12 @@ bool hdr_record_values(struct hdr_histogram* h, int64_t value, int64_t count)
 {
     int32_t counts_index;
 
-    if (value < 0)
+    if (value < 0 || h->highest_trackable_value < value)
     {
         return false;
     }
 
     counts_index = counts_index_for(h, value);
-
     if (counts_index < 0 || h->counts_len <= counts_index)
     {
         return false;
@@ -514,7 +513,7 @@ bool hdr_record_values_atomic(struct hdr_histogram* h, int64_t value, int64_t co
 {
     int32_t counts_index;
 
-    if (value < 0)
+    if (value < 0 || h->highest_trackable_value < value)
     {
         return false;
     }

test/hdr_histogram_atomic_test.c

@@ -435,8 +435,8 @@ static char* test_out_of_range_values(void)
 {
     struct hdr_histogram *h;
     hdr_init(1, 1000, 4, &h);
-    mu_assert("Should successfully record value", hdr_record_value_atomic(h, 32767));
-    mu_assert("Should not record value", !hdr_record_value_atomic(h, 32768));
+    mu_assert("Should successfully record value", hdr_record_value_atomic(h, 1000));
+    mu_assert("Should not record value", !hdr_record_value_atomic(h, 1001));
 
     return 0;
 }

test/hdr_histogram_test.c

@@ -450,8 +450,8 @@ static char* test_out_of_range_values(void)
 {
     struct hdr_histogram *h;
     hdr_init(1, 1000, 4, &h);
-    mu_assert("Should successfully record value", hdr_record_value(h, 32767));
-    mu_assert("Should not record value", !hdr_record_value(h, 32768));
+    mu_assert("Should successfully record value", hdr_record_value(h, 1000));
+    mu_assert("Should not record value", !hdr_record_value(h, 1001));
 
     return 0;
 }