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/*
* Copyright (C) 2008-2019 TrinityCore <https://www.trinitycore.org/>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _PREPAREDSTATEMENT_H
#define _PREPAREDSTATEMENT_H
#include "Define.h"
#include "SQLOperation.h"
#include <future>
#include <vector>
#ifdef __APPLE__
#undef TYPE_BOOL
#endif
//- Union for data buffer (upper-level bind -> queue -> lower-level bind)
union PreparedStatementDataUnion
{
bool boolean;
uint8 ui8;
int8 i8;
uint16 ui16;
int16 i16;
uint32 ui32;
int32 i32;
uint64 ui64;
int64 i64;
float f;
double d;
};
//- This enum helps us differ data held in above union
enum PreparedStatementValueType
{
TYPE_BOOL,
TYPE_UI8,
TYPE_UI16,
TYPE_UI32,
TYPE_UI64,
TYPE_I8,
TYPE_I16,
TYPE_I32,
TYPE_I64,
TYPE_FLOAT,
TYPE_DOUBLE,
TYPE_STRING,
TYPE_BINARY,
TYPE_NULL
};
struct PreparedStatementData
{
PreparedStatementDataUnion data;
PreparedStatementValueType type;
std::vector<uint8> binary;
};
//- Forward declare
class MySQLPreparedStatement;
//- Upper-level class that is used in code
class TC_DATABASE_API PreparedStatementBase
{
friend class PreparedStatementTask;
friend class MySQLPreparedStatement;
friend class MySQLConnection;
public:
explicit PreparedStatementBase(uint32 index, uint8 capacity);
virtual ~PreparedStatementBase();
void setBool(const uint8 index, const bool value);
void setUInt8(const uint8 index, const uint8 value);
void setUInt16(const uint8 index, const uint16 value);
void setUInt32(const uint8 index, const uint32 value);
void setUInt64(const uint8 index, const uint64 value);
void setInt8(const uint8 index, const int8 value);
void setInt16(const uint8 index, const int16 value);
void setInt32(const uint8 index, const int32 value);
void setInt64(const uint8 index, const int64 value);
void setFloat(const uint8 index, const float value);
void setDouble(const uint8 index, const double value);
void setString(const uint8 index, const std::string& value);
void setBinary(const uint8 index, const std::vector<uint8>& value);
void setNull(const uint8 index);
protected:
void BindParameters(MySQLPreparedStatement* stmt);
protected:
MySQLPreparedStatement* m_stmt;
uint32 m_index;
//- Buffer of parameters, not tied to MySQL in any way yet
std::vector<PreparedStatementData> statement_data;
PreparedStatementBase(PreparedStatementBase const& right) = delete;
PreparedStatementBase& operator=(PreparedStatementBase const& right) = delete;
};
template<typename T>
class PreparedStatement : public PreparedStatementBase
{
public:
explicit PreparedStatement(uint32 index, uint8 capacity) : PreparedStatementBase(index, capacity)
{
}
private:
PreparedStatement(PreparedStatement const& right) = delete;
PreparedStatement& operator=(PreparedStatement const& right) = delete;
};
//- Class of which the instances are unique per MySQLConnection
//- access to these class objects is only done when a prepared statement task
//- is executed.
class TC_DATABASE_API MySQLPreparedStatement
{
friend class MySQLConnection;
friend class PreparedStatementBase;
public:
MySQLPreparedStatement(MYSQL_STMT* stmt, std::string queryString);
~MySQLPreparedStatement();
void setNull(const uint8 index);
void setBool(const uint8 index, const bool value);
void setUInt8(const uint8 index, const uint8 value);
void setUInt16(const uint8 index, const uint16 value);
void setUInt32(const uint8 index, const uint32 value);
void setUInt64(const uint8 index, const uint64 value);
void setInt8(const uint8 index, const int8 value);
void setInt16(const uint8 index, const int16 value);
void setInt32(const uint8 index, const int32 value);
void setInt64(const uint8 index, const int64 value);
void setFloat(const uint8 index, const float value);
void setDouble(const uint8 index, const double value);
void setBinary(const uint8 index, const std::vector<uint8>& value, bool isString);
uint32 GetParameterCount() const { return m_paramCount; }
protected:
MYSQL_STMT* GetSTMT() { return m_Mstmt; }
MYSQL_BIND* GetBind() { return m_bind; }
PreparedStatementBase* m_stmt;
void ClearParameters();
void AssertValidIndex(uint8 index);
std::string getQueryString() const;
private:
MYSQL_STMT* m_Mstmt;
uint32 m_paramCount;
std::vector<bool> m_paramsSet;
MYSQL_BIND* m_bind;
std::string const m_queryString;
MySQLPreparedStatement(MySQLPreparedStatement const& right) = delete;
MySQLPreparedStatement& operator=(MySQLPreparedStatement const& right) = delete;
};
//- Lower-level class, enqueuable operation
class TC_DATABASE_API PreparedStatementTask : public SQLOperation
{
public:
PreparedStatementTask(PreparedStatementBase* stmt, bool async = false);
~PreparedStatementTask();
bool Execute() override;
PreparedQueryResultFuture GetFuture() { return m_result->get_future(); }
protected:
PreparedStatementBase* m_stmt;
bool m_has_result;
PreparedQueryResultPromise* m_result;
};
#endif
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