/* * Copyright (C) 2018 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef SRC_TRACE_PROCESSOR_STRING_TABLE_H_ #define SRC_TRACE_PROCESSOR_STRING_TABLE_H_ #include <limits> #include <memory> #include "src/trace_processor/table.h" namespace perfetto { namespace trace_processor { class QueryConstraints; class TraceStorage; // A virtual table that allows to list and query all the strings in the db. class StringTable : public Table { public: enum Column { kStringId = 0, kString = 1, }; // Implementation of the SQLite cursor interface. class Cursor : public Table::Cursor { public: Cursor(StringTable*); ~Cursor() override; // Implementation of Table::Cursor. int Filter(const QueryConstraints&, sqlite3_value**) override; int Next() override; int Eof() override; int Column(sqlite3_context*, int N) override; private: Cursor(Cursor&) = delete; Cursor& operator=(const Cursor&) = delete; Cursor(Cursor&&) noexcept = default; Cursor& operator=(Cursor&&) = default; size_t row_ = 0; size_t num_rows_ = 0; const TraceStorage* storage_ = nullptr; StringTable* table_ = nullptr; }; StringTable(sqlite3*, const TraceStorage* storage); static void RegisterTable(sqlite3* db, const TraceStorage* storage); // Table implementation. base::Optional<Table::Schema> Init(int, const char* const*) override; std::unique_ptr<Table::Cursor> CreateCursor() override; int BestIndex(const QueryConstraints&, BestIndexInfo*) override; private: const TraceStorage* const storage_; }; } // namespace trace_processor } // namespace perfetto #endif // SRC_TRACE_PROCESSOR_STRING_TABLE_H_