/usr/include/cppconn/variant.h is in libmysqlcppconn-dev 1.1.7-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/C++ is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
MySQL Connectors. There are special exceptions to the terms and
conditions of the GPLv2 as it is applied to this software, see the
FLOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
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; version 2 of the License.
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, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _SQL_VARIANT_H_
#define _SQL_VARIANT_H_
#include <string>
#include <map>
#include <list>
#include <algorithm>
#include <typeinfo>
#include "build_config.h"
#include "sqlstring.h"
#include "exception.h"
namespace sql
{
class BaseVariantImpl
{
public:
BaseVariantImpl (void *ptr, sql::SQLString vtype) :
cvptr(ptr),
vTypeName(vtype)
{}
virtual ~BaseVariantImpl() {
cvptr=NULL;
}
virtual BaseVariantImpl* Clone()=0;
template<class T>
T* get() const {
if (typeid(T).name() == typeid(void).name()) {
return static_cast< T * > (cvptr);
}
if ((vTypeName == typeid(std::string).name() &&
typeid(T).name() == typeid(sql::SQLString).name()) ||
(vTypeName == typeid(sql::SQLString).name() &&
typeid(T).name() == typeid(std::string).name()) ||
(vTypeName == typeid(std::map< std::string, std::string >).name() &&
typeid(T).name() ==
typeid(std::map< sql::SQLString, sql::SQLString >).name()) ||
(vTypeName ==
typeid(std::map< sql::SQLString, sql::SQLString >).name() &&
typeid(T).name() ==
typeid(std::map< std::string, std::string >).name()) ||
(vTypeName == typeid(std::list< std::string >).name() &&
typeid(T).name() ==
typeid(std::list< sql::SQLString >).name()) ||
(vTypeName ==
typeid(std::list< sql::SQLString >).name() &&
typeid(T).name() ==
typeid(std::list< std::string >).name()))
{
return static_cast< T * > (cvptr);
}
if (typeid(T).name() != vTypeName) {
throw sql::InvalidArgumentException("Variant type doesn't match.");
}
return static_cast< T * > (cvptr);
}
protected:
void *cvptr;
sql::SQLString vTypeName;
};
template<class T>
class VariantImpl : public BaseVariantImpl
{
public:
VariantImpl(T i) : BaseVariantImpl(new T(i), typeid(i).name()) {}
~VariantImpl() {
destroy_content();
}
VariantImpl(VariantImpl& that) : BaseVariantImpl(that) {
copy_content(that);
}
VariantImpl& operator=(VariantImpl& that) {
if (this != &that) {
destroy_content();
if (cvptr == NULL) {
copy_content(that);
}
}
return *this;
}
virtual VariantImpl* Clone() {
return new VariantImpl(*this);
}
private:
void destroy_content() {
T *tmp=static_cast< T * >(cvptr);
if (tmp) {
delete tmp;
cvptr=NULL;
}
}
void copy_content(BaseVariantImpl& that) {
cvptr=new T (*(static_cast< T * > (that.get< void >())));
}
};
template<class T>
class VariantMap : public BaseVariantImpl
{
public:
VariantMap(T i) : BaseVariantImpl(new T(i), typeid(i).name()) {}
~VariantMap() {
destroy_content();
}
VariantMap(VariantMap& that) : BaseVariantImpl(that) {
if (this != &that) {
copy_content(that);
}
}
VariantMap& operator=(VariantMap& that) {
if (this != &that) {
destroy_content();
copy_content(that);
}
return *this;
}
virtual VariantMap* Clone() {
return new VariantMap(*this);
}
private:
void destroy_content() {
T *tmp=static_cast< T *> (cvptr);
if (tmp) {
tmp->clear();
delete tmp;
cvptr=NULL;
}
}
void copy_content(VariantMap& var) {
T *tmp=static_cast< T *> (var.cvptr);
if (tmp) {
cvptr=new T();
typename T::const_iterator cit=tmp->begin();
while(cit != tmp->end()) {
(static_cast< T * >(cvptr))->insert(
std::make_pair(sql::SQLString(cit->first),
sql::SQLString(cit->second)));
++cit;
}
}
}
};
template<class T>
class VariantList : public BaseVariantImpl
{
public:
VariantList(T i) : BaseVariantImpl(new T(i), typeid(i).name()) {}
~VariantList() {
destroy_content();
}
VariantList(VariantList& that) : BaseVariantImpl(that) {
if (this != &that) {
copy_content(that);
}
}
VariantList& operator=(VariantList& that) {
if (this != &that) {
destroy_content();
copy_content(that);
}
return *this;
}
virtual VariantList* Clone() {
return new VariantList(*this);
}
private:
void destroy_content()
{
T *tmp=static_cast< T *> (cvptr);
if (tmp) {
tmp->clear();
delete tmp;
cvptr=NULL;
}
}
void copy_content(VariantList& var)
{
T *tmp=static_cast< T *> (var.cvptr);
if (tmp) {
cvptr=new T();
typename T::const_iterator cit=tmp->begin();
while(cit != tmp->end()) {
(static_cast< T * >(cvptr))->push_back(sql::SQLString(*cit));
++cit;
}
}
}
};
class CPPCONN_PUBLIC_FUNC Variant
{
public:
Variant(const int &i=0) :
variant(new VariantImpl< int >(i)) {}
Variant(const double &i) :
variant(new VariantImpl< double >(i)) {}
Variant(const bool &i) :
variant(new VariantImpl< bool >(i)) {}
Variant(const std::string &i) :
variant(new VariantImpl< std::string >(i)) {}
Variant(const sql::SQLString &i) :
variant(new VariantImpl< sql::SQLString >(i)) {}
Variant(const std::list< std::string > &i) :
variant(new VariantList< std::list < std::string > >(i)) {}
Variant(const std::list< sql::SQLString > &i) :
variant(new VariantList< std::list < sql::SQLString > >(i)) {}
Variant(const std::map< std::string, std::string > &i) :
variant(new VariantMap< std::map< std::string, std::string > >(i)) {}
Variant(const std::map< sql::SQLString, sql::SQLString > &i) :
variant(new VariantMap< std::map< sql::SQLString, sql::SQLString > >(i)) {}
~Variant() {
if (variant) {
delete variant;
variant=0;
}
}
Variant(const Variant& that) {
if (this != &that) {
variant=that.variant->Clone();
}
}
Variant& operator=(const Variant& that) {
if (this != &that) {
delete variant;
variant=that.variant->Clone();
}
return *this;
}
template<class T>
T* get() const {
return variant->get<T>();
}
private:
BaseVariantImpl *variant;
};
} /* namespace sql */
#endif /* _SQL_VARIANT_H_ */
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