1/*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2023. All rights reserved.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "instants_table.h"
17#include <cmath>
18
19namespace SysTuning {
20namespace TraceStreamer {
21enum class Index : int32_t { TS = 0, NAME, REF, WAKEUP_FROM, REF_TYPE, VALUE };
22InstantsTable::InstantsTable(const TraceDataCache *dataCache) : TableBase(dataCache)
23{
24    tableColumn_.push_back(TableBase::ColumnInfo("ts", "INTEGER"));
25    tableColumn_.push_back(TableBase::ColumnInfo("name", "TEXT"));
26    tableColumn_.push_back(TableBase::ColumnInfo("ref", "INTEGER"));
27    tableColumn_.push_back(TableBase::ColumnInfo("wakeup_from", "INTEGER"));
28    tableColumn_.push_back(TableBase::ColumnInfo("ref_type", "TEXT"));
29    tableColumn_.push_back(TableBase::ColumnInfo("value", "REAL"));
30    tablePriKey_.push_back("ts");
31    tablePriKey_.push_back("ref");
32}
33
34InstantsTable::~InstantsTable() {}
35
36std::unique_ptr<TableBase::Cursor> InstantsTable::CreateCursor()
37{
38    return std::make_unique<Cursor>(dataCache_, this);
39}
40
41InstantsTable::Cursor::Cursor(const TraceDataCache *dataCache, TableBase *table)
42    : TableBase::Cursor(dataCache, table, static_cast<uint32_t>(dataCache->GetConstInstantsData().Size())),
43      InstantsObj_(dataCache->GetConstInstantsData())
44{
45}
46
47InstantsTable::Cursor::~Cursor() {}
48
49void InstantsTable::FilterByConstraint(FilterConstraints &instantsfc,
50                                       double &instantsfilterCost,
51                                       size_t instantsrowCount,
52                                       uint32_t instantscurrenti)
53{
54    const auto &instantsc = instantsfc.GetConstraints()[instantscurrenti];
55    switch (static_cast<Index>(instantsc.col)) {
56        case Index::TS: {
57            auto instantsoldRowCount = instantsrowCount;
58            if (CanFilterSorted(instantsc.op, instantsrowCount)) {
59                instantsfc.UpdateConstraint(instantscurrenti, true);
60                instantsfilterCost += log2(instantsoldRowCount); // binary search
61            } else {
62                instantsfilterCost += instantsoldRowCount;
63            }
64            break;
65        }
66        default:                                    // other column
67            instantsfilterCost += instantsrowCount; // scan all rows
68            break;
69    }
70}
71
72void InstantsTable::Cursor::SortOfIndexMap(const FilterConstraints &fc)
73{
74    auto orderbys = fc.GetOrderBys();
75    for (auto i = orderbys.size(); i > 0;) {
76        i--;
77        switch (static_cast<Index>(orderbys[i].iColumn)) {
78            case Index::TS:
79                indexMap_->SortBy(orderbys[i].desc);
80                break;
81            default:
82                break;
83        }
84    }
85}
86
87int32_t InstantsTable::Cursor::Filter(const FilterConstraints &fc, sqlite3_value **argv)
88{
89    // reset
90    indexMap_ = std::make_unique<IndexMap>(0, rowCount_);
91    if (rowCount_ <= 0) {
92        return SQLITE_OK;
93    }
94    auto instantsTabCs = fc.GetConstraints();
95    std::set<uint32_t> sId = {static_cast<uint32_t>(Index::TS)};
96    SwapIndexFront(instantsTabCs, sId);
97    for (size_t i = 0; i < instantsTabCs.size(); i++) {
98        const auto &c = instantsTabCs[i];
99        switch (static_cast<Index>(c.col)) {
100            case Index::TS:
101                FilterTS(c.op, argv[c.idxInaConstraint], InstantsObj_.TimeStampData());
102                break;
103            case Index::NAME:
104                indexMap_->MixRange(c.op,
105                                    dataCache_->GetConstDataIndex(std::string(
106                                        reinterpret_cast<const char *>(sqlite3_value_text(argv[c.idxInaConstraint])))),
107                                    InstantsObj_.NameIndexsData());
108                break;
109            case Index::REF:
110                indexMap_->MixRange(c.op, static_cast<uint32_t>(sqlite3_value_int(argv[c.idxInaConstraint])),
111                                    InstantsObj_.InternalTidsData());
112                break;
113            case Index::WAKEUP_FROM:
114                indexMap_->MixRange(c.op, static_cast<int64_t>(sqlite3_value_int64(argv[c.idxInaConstraint])),
115                                    InstantsObj_.WakeupFromPidsData());
116                break;
117            default:
118                break;
119        }
120    }
121    SortOfIndexMap(fc);
122
123    return SQLITE_OK;
124}
125
126int32_t InstantsTable::Cursor::Column(int32_t column) const
127{
128    size_t stringIdentity = static_cast<size_t>(InstantsObj_.NameIndexsData()[CurrentRow()]);
129    switch (static_cast<Index>(column)) {
130        case Index::TS:
131            sqlite3_result_int64(context_, static_cast<int64_t>(InstantsObj_.TimeStampData()[CurrentRow()]));
132            break;
133        case Index::NAME: {
134            sqlite3_result_text(context_, dataCache_->GetDataFromDict(stringIdentity).c_str(), STR_DEFAULT_LEN,
135                                nullptr);
136            break;
137        }
138        case Index::REF:
139            sqlite3_result_int64(context_, static_cast<int32_t>(InstantsObj_.InternalTidsData()[CurrentRow()]));
140            break;
141        case Index::WAKEUP_FROM:
142            sqlite3_result_int64(context_, static_cast<int32_t>(InstantsObj_.WakeupFromPidsData()[CurrentRow()]));
143            break;
144        case Index::REF_TYPE: {
145            sqlite3_result_text(context_, "itid", STR_DEFAULT_LEN, nullptr);
146            break;
147        }
148        case Index::VALUE: {
149            sqlite3_result_double(context_, 0.0);
150            break;
151        }
152        default:
153            TS_LOGF("Unregistered column : %d", column);
154            break;
155    }
156    return SQLITE_OK;
157}
158void InstantsTable::GetOrbyes(FilterConstraints &instantsfc, EstimatedIndexInfo &instantsei)
159{
160    // To use the EstimateFilterCost function in the TableBase parent class function to calculate the i-value of each
161    // for loop
162    auto instantsorderbys = instantsfc.GetOrderBys();
163    for (auto i = 0; i < instantsorderbys.size(); i++) {
164        switch (static_cast<Index>(instantsorderbys[i].iColumn)) {
165            case Index::TS:
166                break;
167            default: // other columns can be sorted by SQLite
168                instantsei.isOrdered = false;
169                break;
170        }
171    }
172}
173} // namespace TraceStreamer
174} // namespace SysTuning
175