1 /* 2 * Copyright (C) 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SRC_TRACE_PROCESSOR_PERFETTO_SQL_INTRINSICS_TYPES_ROW_DATAFRAME_H_ 18 #define SRC_TRACE_PROCESSOR_PERFETTO_SQL_INTRINSICS_TYPES_ROW_DATAFRAME_H_ 19 20 #include <algorithm> 21 #include <cstdint> 22 #include <optional> 23 #include <string> 24 #include <vector> 25 26 #include "src/trace_processor/perfetto_sql/intrinsics/types/array.h" 27 #include "src/trace_processor/perfetto_sql/intrinsics/types/value.h" 28 29 namespace perfetto::trace_processor::perfetto_sql { 30 31 // Data structure to allow easy exchange of "table-like" data between SQL and 32 // C++ code. Allows fast lookup of rows by id (if an id column exists). 33 struct RowDataframe { 34 perfetto_sql::StringArray column_names; 35 std::vector<uint32_t> id_to_cell_index; 36 // Cell = a value at a row + column index. 37 std::vector<perfetto_sql::Value> cells; 38 std::optional<uint32_t> id_column_index; 39 RowForIdRowDataframe40 const perfetto_sql::Value* RowForId(uint32_t id) const { 41 return cells.data() + id_to_cell_index[id]; 42 } 43 FindColumnWithNameRowDataframe44 std::optional<uint32_t> FindColumnWithName(const std::string& name) { 45 auto it = std::find(column_names.begin(), column_names.end(), name); 46 return it == column_names.end() ? std::nullopt 47 : std::make_optional(static_cast<uint32_t>( 48 it - column_names.begin())); 49 } 50 sizeRowDataframe51 uint32_t size() const { 52 return static_cast<uint32_t>(cells.size() / column_names.size()); 53 } 54 }; 55 56 } // namespace perfetto::trace_processor::perfetto_sql 57 58 #endif // SRC_TRACE_PROCESSOR_PERFETTO_SQL_INTRINSICS_TYPES_ROW_DATAFRAME_H_ 59