mirror of https://github.com/facebook/rocksdb.git
104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
// Copyright (c) 2017-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "test_agg_merge.h"
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#include <cassert>
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#include <deque>
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#include <vector>
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#include "util/coding.h"
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#include "utilities/agg_merge/agg_merge_impl.h"
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namespace ROCKSDB_NAMESPACE {
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std::string EncodeHelper::EncodeFuncAndInt(const Slice& function_name,
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int64_t value) {
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std::string encoded_value;
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PutVarsignedint64(&encoded_value, value);
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std::string ret;
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Status s = EncodeAggFuncAndPayload(function_name, encoded_value, ret);
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assert(s.ok());
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return ret;
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}
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std::string EncodeHelper::EncodeInt(int64_t value) {
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std::string encoded_value;
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PutVarsignedint64(&encoded_value, value);
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return encoded_value;
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}
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std::string EncodeHelper::EncodeFuncAndList(const Slice& function_name,
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const std::vector<Slice>& list) {
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std::string ret;
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Status s = EncodeAggFuncAndPayload(function_name, EncodeList(list), ret);
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assert(s.ok());
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return ret;
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}
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std::string EncodeHelper::EncodeList(const std::vector<Slice>& list) {
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std::string result;
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for (const Slice& entity : list) {
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PutLengthPrefixedSlice(&result, entity);
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}
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return result;
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}
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bool SumAggregator::Aggregate(const std::vector<Slice>& item_list,
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std::string& result) const {
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int64_t sum = 0;
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for (const Slice& item : item_list) {
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int64_t ivalue;
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Slice v = item;
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if (!GetVarsignedint64(&v, &ivalue) || !v.empty()) {
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return false;
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}
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sum += ivalue;
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}
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result = EncodeHelper::EncodeInt(sum);
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return true;
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}
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bool MultipleAggregator::Aggregate(const std::vector<Slice>& item_list,
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std::string& result) const {
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int64_t mresult = 1;
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for (const Slice& item : item_list) {
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int64_t ivalue;
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Slice v = item;
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if (!GetVarsignedint64(&v, &ivalue) || !v.empty()) {
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return false;
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}
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mresult *= ivalue;
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}
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result = EncodeHelper::EncodeInt(mresult);
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return true;
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}
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bool Last3Aggregator::Aggregate(const std::vector<Slice>& item_list,
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std::string& result) const {
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std::vector<Slice> last3;
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last3.reserve(3);
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for (auto it = item_list.rbegin(); it != item_list.rend(); ++it) {
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Slice input = *it;
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Slice entity;
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bool ret;
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while ((ret = GetLengthPrefixedSlice(&input, &entity)) == true) {
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last3.push_back(entity);
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if (last3.size() >= 3) {
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break;
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}
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}
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if (last3.size() >= 3) {
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break;
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}
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if (!ret) {
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continue;
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}
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}
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result = EncodeHelper::EncodeList(last3);
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return true;
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}
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} // namespace ROCKSDB_NAMESPACE
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