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//
// Copyright (C) 2004-2016 Maciej Sobczak, Stephen Hutton
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
//
#ifndef SOCI_USE_TYPE_H_INCLUDED
#define SOCI_USE_TYPE_H_INCLUDED
#include "soci/soci-platform.h"
#include "soci/soci-backend.h"
#include "soci/type-ptr.h"
#include "soci/exchange-traits.h"
// std
#include <cstddef>
#include <ostream>
#include <string>
#include <vector>
namespace soci { namespace details {
class statement_impl;
// this is intended to be a base class for all classes that deal with
// binding input data (and OUT PL/SQL variables)
class SOCI_DECL use_type_base
{
public:
virtual ~use_type_base() {}
virtual void bind(statement_impl & st, int & position) = 0;
virtual std::string get_name() const = 0;
virtual void dump_value(std::ostream& os, int index) const = 0;
virtual void pre_exec(int num) = 0;
virtual void pre_use() = 0;
virtual void post_use(bool gotData) = 0;
virtual void clean_up() = 0;
virtual std::size_t size() const = 0; // returns the number of elements
};
typedef type_ptr<use_type_base> use_type_ptr;
class SOCI_DECL standard_use_type : public use_type_base
{
public:
standard_use_type(void* data, exchange_type type,
bool readOnly, std::string const& name = std::string())
: data_(data)
, type_(type)
, ind_(NULL)
, readOnly_(readOnly)
, name_(name)
, backEnd_(NULL)
{
// FIXME: This was added with Ilia's patch
// https://github.com/SOCI/soci/commit/c166625a28f7c907318134f625ff5acea7d9a1f8
// but it seems to be a troublemaker, causing duplicated conversions
//convert_to_base();
}
standard_use_type(void* data, exchange_type type, indicator& ind,
bool readOnly, std::string const& name = std::string())
: data_(data)
, type_(type)
, ind_(&ind)
, readOnly_(readOnly)
, name_(name)
, backEnd_(NULL)
{
// FIXME
//convert_to_base();
}
~standard_use_type() override;
void bind(statement_impl & st, int & position) override;
std::string get_name() const override { return name_; }
void dump_value(std::ostream& os, int index) const override;
virtual void * get_data() { return data_; }
// conversion hook (from arbitrary user type to base type)
virtual void convert_to_base() {}
virtual void convert_from_base() {}
protected:
void pre_use() override;
private:
void pre_exec(int num) override;
void post_use(bool gotData) override;
void clean_up() override;
std::size_t size() const override { return 1; }
void* data_;
exchange_type type_;
indicator* ind_;
bool readOnly_;
std::string name_;
standard_use_type_backend* backEnd_;
};
class SOCI_DECL vector_use_type : public use_type_base
{
public:
vector_use_type(void* data, exchange_type type,
std::string const& name = std::string())
: data_(data)
, type_(type)
, ind_(NULL)
, begin_(0)
, end_(NULL)
, name_(name)
, backEnd_(NULL)
{}
vector_use_type(void* data, exchange_type type,
std::size_t begin, std::size_t * end,
std::string const& name = std::string())
: data_(data)
, type_(type)
, ind_(NULL)
, begin_(begin)
, end_(end)
, name_(name)
, backEnd_(NULL)
{}
vector_use_type(void* data, exchange_type type,
std::vector<indicator> const& ind,
std::string const& name = std::string())
: data_(data)
, type_(type)
, ind_(&ind)
, begin_(0)
, end_(NULL)
, name_(name)
, backEnd_(NULL)
{}
vector_use_type(void* data, exchange_type type,
std::vector<indicator> const& ind,
std::size_t begin, std::size_t * end,
std::string const& name = std::string())
: data_(data)
, type_(type)
, ind_(&ind)
, begin_(begin)
, end_(end)
, name_(name)
, backEnd_(NULL)
{}
~vector_use_type() override;
private:
void bind(statement_impl& st, int & position) override;
std::string get_name() const override { return name_; }
void dump_value(std::ostream& os, int index) const override;
void pre_exec(int num) override;
void pre_use() override;
void post_use(bool) override { /* nothing to do */ }
void clean_up() override;
std::size_t size() const override;
void* data_;
exchange_type type_;
std::vector<indicator> const* ind_;
std::size_t begin_;
std::size_t * end_;
std::string name_;
vector_use_type_backend * backEnd_;
virtual void convert_to_base() {}
};
// implementation for the basic types (those which are supported by the library
// out of the box without user-provided conversions)
template <typename T>
class use_type : public standard_use_type
{
public:
use_type(T& t, std::string const& name = std::string())
: standard_use_type(&t,
static_cast<exchange_type>(exchange_traits<T>::x_type), false, name)
{}
use_type(T const& t, std::string const& name = std::string())
: standard_use_type(const_cast<T*>(&t),
static_cast<exchange_type>(exchange_traits<T>::x_type), true, name)
{}
use_type(T& t, indicator& ind, std::string const& name = std::string())
: standard_use_type(&t,
static_cast<exchange_type>(exchange_traits<T>::x_type), ind, false, name)
{}
use_type(T const& t, indicator& ind, std::string const& name = std::string())
: standard_use_type(const_cast<T*>(&t),
static_cast<exchange_type>(exchange_traits<T>::x_type), ind, true, name)
{}
};
template <typename T>
class use_type<std::vector<T> > : public vector_use_type
{
public:
use_type(std::vector<T>& v, std::string const& name = std::string())
: vector_use_type(&v,
static_cast<exchange_type>(exchange_traits<T>::x_type), name)
{}
use_type(std::vector<T>& v, std::size_t begin, std::size_t * end,
std::string const& name = std::string())
: vector_use_type(&v,
static_cast<exchange_type>(exchange_traits<T>::x_type), begin, end, name)
{}
use_type(std::vector<T> const& v, std::string const& name = std::string())
: vector_use_type(const_cast<std::vector<T>*>(&v),
static_cast<exchange_type>(exchange_traits<T>::x_type), name)
{}
use_type(std::vector<T> const& v, std::size_t begin, std::size_t * end,
std::string const& name = std::string())
: vector_use_type(const_cast<std::vector<T>*>(&v),
static_cast<exchange_type>(exchange_traits<T>::x_type), begin, end, name)
{}
use_type(std::vector<T>& v, std::vector<indicator> const& ind,
std::string const& name = std::string())
: vector_use_type(&v,
static_cast<exchange_type>(exchange_traits<T>::x_type), ind, name)
{}
use_type(std::vector<T>& v, std::vector<indicator> const& ind,
std::size_t begin, std::size_t * end, std::string const& name = std::string())
: vector_use_type(&v,
static_cast<exchange_type>(exchange_traits<T>::x_type), ind, begin, end, name)
{}
use_type(std::vector<T> const& v, std::vector<indicator> const& ind,
std::string const& name = std::string())
: vector_use_type(const_cast<std::vector<T> *>(&v),
static_cast<exchange_type>(exchange_traits<T>::x_type), ind, name)
{}
use_type(std::vector<T> const& v, std::vector<indicator> const& ind,
std::size_t begin, std::size_t * end, std::string const& name = std::string())
: vector_use_type(const_cast<std::vector<T> *>(&v),
static_cast<exchange_type>(exchange_traits<T>::x_type), ind, begin, end, name)
{}
};
// helper dispatchers for basic types
template <typename T>
use_type_ptr do_use(T & t, std::string const & name, basic_type_tag)
{
return use_type_ptr(new use_type<T>(t, name));
}
template <typename T>
use_type_ptr do_use(T const & t, std::string const & name, basic_type_tag)
{
return use_type_ptr(new use_type<T>(t, name));
}
template <typename T>
use_type_ptr do_use(T & t, indicator & ind,
std::string const & name, basic_type_tag)
{
return use_type_ptr(new use_type<T>(t, ind, name));
}
template <typename T>
use_type_ptr do_use(T const & t, indicator & ind,
std::string const & name, basic_type_tag)
{
return use_type_ptr(new use_type<T>(t, ind, name));
}
template <typename T>
use_type_ptr do_use(T & t, std::vector<indicator> & ind,
std::string const & name, basic_type_tag)
{
return use_type_ptr(new use_type<T>(t, ind, name));
}
template <typename T>
use_type_ptr do_use(T const & t, std::vector<indicator> & ind,
std::string const & name, basic_type_tag)
{
return use_type_ptr(new use_type<T>(t, ind, name));
}
template <typename T>
use_type_ptr do_use(std::vector<T> & t,
std::size_t begin, std::size_t * end,
std::string const & name, basic_type_tag)
{
return use_type_ptr(
new use_type<std::vector<T> >(t, begin, end, name));
}
template <typename T>
use_type_ptr do_use(const std::vector<T> & t,
std::size_t begin, std::size_t * end,
std::string const & name, basic_type_tag)
{
return use_type_ptr(
new use_type<std::vector<T> >(t, begin, end, name));
}
template <typename T>
use_type_ptr do_use(std::vector<T> & t, std::vector<indicator> & ind,
std::size_t begin, std::size_t * end,
std::string const & name, basic_type_tag)
{
return use_type_ptr(
new use_type<std::vector<T> >(t, ind, begin, end, name));
}
template <typename T>
use_type_ptr do_use(const std::vector<T> & t, std::vector<indicator> & ind,
std::size_t begin, std::size_t * end,
std::string const & name, basic_type_tag)
{
return use_type_ptr(
new use_type<std::vector<T> >(t, ind, begin, end, name));
}
} // namespace details
} // namesapce soci
#endif // SOCI_USE_TYPE_H_INCLUDED
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