1 files changed, 32 insertions, 0 deletions
diff --git a/toolkit/components/glean/bindings/private/DistributionData.h b/toolkit/components/glean/bindings/private/DistributionData.h
new file mode 100644
index 0000000000..6ff995f222
--- /dev/null
+++ b/toolkit/components/glean/bindings/private/DistributionData.h
@@ -0,0 +1,32 @@
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_glean_DistributionData_h
+#define mozilla_glean_DistributionData_h
+
+#include "nsTHashMap.h"
+
+namespace mozilla::glean {
+
+struct DistributionData final {
+  uint64_t sum;
+  nsTHashMap<nsUint64HashKey, uint64_t> values;
+
+  /**
+   * Create distribution data from the buckets, counts and sum,
+   * as returned by `fog_*_distribution_test_get_value`.
+   */
+  DistributionData(const nsTArray<uint64_t>& aBuckets,
+                   const nsTArray<uint64_t>& aCounts, uint64_t aSum)
+      : sum(aSum) {
+    for (size_t i = 0; i < aBuckets.Length(); ++i) {
+      this->values.InsertOrUpdate(aBuckets[i], aCounts[i]);
+    }
+  }
+};
+
+}  // namespace mozilla::glean
+
+#endif /* mozilla_glean_DistributionData_h */