85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/utils/common.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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#include "td/db/detail/RawSqliteDb.h"
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#include <memory>
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struct sqlite3;
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struct sqlite3_stmt;
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namespace td {
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class SqliteStatement {
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public:
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SqliteStatement() = default;
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SqliteStatement(const SqliteStatement &other) = delete;
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SqliteStatement &operator=(const SqliteStatement &other) = delete;
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SqliteStatement(SqliteStatement &&other) = default;
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SqliteStatement &operator=(SqliteStatement &&other) = default;
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~SqliteStatement();
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Status bind_blob(int id, Slice blob) TD_WARN_UNUSED_RESULT;
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Status bind_string(int id, Slice str) TD_WARN_UNUSED_RESULT;
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Status bind_int32(int id, int32 value) TD_WARN_UNUSED_RESULT;
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Status bind_int64(int id, int64 value) TD_WARN_UNUSED_RESULT;
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Status bind_null(int id) TD_WARN_UNUSED_RESULT;
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Status step() TD_WARN_UNUSED_RESULT;
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Slice view_string(int id) TD_WARN_UNUSED_RESULT;
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Slice view_blob(int id) TD_WARN_UNUSED_RESULT;
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int32 view_int32(int id) TD_WARN_UNUSED_RESULT;
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int64 view_int64(int id) TD_WARN_UNUSED_RESULT;
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enum class Datatype { Integer, Float, Blob, Null, Text };
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Datatype view_datatype(int id);
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Result<string> explain();
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bool can_step() const {
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return state_ != State::Finish;
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}
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bool has_row() const {
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return state_ == State::GotRow;
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}
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bool empty() const {
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return !stmt_;
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}
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void reset();
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auto guard() {
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return ScopeExit{} + [this] {
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this->reset();
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};
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}
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// TODO get row
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private:
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friend class SqliteDb;
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SqliteStatement(sqlite3_stmt *stmt, std::shared_ptr<detail::RawSqliteDb> db);
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class StmtDeleter {
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public:
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void operator()(sqlite3_stmt *stmt);
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};
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enum class State { Start, GotRow, Finish };
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State state_ = State::Start;
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std::unique_ptr<sqlite3_stmt, StmtDeleter> stmt_;
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std::shared_ptr<detail::RawSqliteDb> db_;
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Status last_error();
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};
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} // namespace td
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