1 files changed, 104 insertions, 0 deletions
diff --git a/src/rocksdb/utilities/agg_merge/test_agg_merge.cc b/src/rocksdb/utilities/agg_merge/test_agg_merge.cc
new file mode 100644
index 000000000..06e5b5697
--- /dev/null
+++ b/src/rocksdb/utilities/agg_merge/test_agg_merge.cc
@@ -0,0 +1,104 @@
+//  Copyright (c) 2017-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#include "test_agg_merge.h"
+
+#include <assert.h>
+
+#include <deque>
+#include <vector>
+
+#include "util/coding.h"
+#include "utilities/agg_merge/agg_merge.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+std::string EncodeHelper::EncodeFuncAndInt(const Slice& function_name,
+                                           int64_t value) {
+  std::string encoded_value;
+  PutVarsignedint64(&encoded_value, value);
+  std::string ret;
+  Status s = EncodeAggFuncAndPayload(function_name, encoded_value, ret);
+  assert(s.ok());
+  return ret;
+}
+
+std::string EncodeHelper::EncodeInt(int64_t value) {
+  std::string encoded_value;
+  PutVarsignedint64(&encoded_value, value);
+  return encoded_value;
+}
+
+std::string EncodeHelper::EncodeFuncAndList(const Slice& function_name,
+                                            const std::vector<Slice>& list) {
+  std::string ret;
+  Status s = EncodeAggFuncAndPayload(function_name, EncodeList(list), ret);
+  assert(s.ok());
+  return ret;
+}
+
+std::string EncodeHelper::EncodeList(const std::vector<Slice>& list) {
+  std::string result;
+  for (const Slice& entity : list) {
+    PutLengthPrefixedSlice(&result, entity);
+  }
+  return result;
+}
+
+bool SumAggregator::Aggregate(const std::vector<Slice>& item_list,
+                              std::string& result) const {
+  int64_t sum = 0;
+  for (const Slice& item : item_list) {
+    int64_t ivalue;
+    Slice v = item;
+    if (!GetVarsignedint64(&v, &ivalue) || !v.empty()) {
+      return false;
+    }
+    sum += ivalue;
+  }
+  result = EncodeHelper::EncodeInt(sum);
+  return true;
+}
+
+bool MultipleAggregator::Aggregate(const std::vector<Slice>& item_list,
+                                   std::string& result) const {
+  int64_t mresult = 1;
+  for (const Slice& item : item_list) {
+    int64_t ivalue;
+    Slice v = item;
+    if (!GetVarsignedint64(&v, &ivalue) || !v.empty()) {
+      return false;
+    }
+    mresult *= ivalue;
+  }
+  result = EncodeHelper::EncodeInt(mresult);
+  return true;
+}
+
+bool Last3Aggregator::Aggregate(const std::vector<Slice>& item_list,
+                                std::string& result) const {
+  std::vector<Slice> last3;
+  last3.reserve(3);
+  for (auto it = item_list.rbegin(); it != item_list.rend(); ++it) {
+    Slice input = *it;
+    Slice entity;
+    bool ret;
+    while ((ret = GetLengthPrefixedSlice(&input, &entity)) == true) {
+      last3.push_back(entity);
+      if (last3.size() >= 3) {
+        break;
+      }
+    }
+    if (last3.size() >= 3) {
+      break;
+    }
+    if (!ret) {
+      continue;
+    }
+  }
+  result = EncodeHelper::EncodeList(last3);
+  return true;
+}
+}  // namespace ROCKSDB_NAMESPACE