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// Copyright (c) 2022 Klemens D. Morgenstern
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_SQLITE_FIELD_HPP
#define BOOST_SQLITE_FIELD_HPP
#include <boost/sqlite/detail/config.hpp>
#include <boost/sqlite/blob.hpp>
#include <boost/sqlite/cstring_ref.hpp>
#include <boost/sqlite/value.hpp>
#include <boost/core/detail/string_view.hpp>
BOOST_SQLITE_BEGIN_NAMESPACE
/** @brief A holder for a sqlite field, i.e. something returned from a query.
@ingroup reference
*/
struct field
{
typedef sqlite_int64 int64;
/// The type of the value
value_type type() const
{
return static_cast<value_type>( sqlite3_column_type(stm_, col_));
}
/// Is the held value null
bool is_null() const
{
return type() == value_type::null;
}
/// Is the held value is not null
explicit operator bool () const
{
return type() != value_type::null;
}
/// Returns the value as an `int64`.
int64 get_int() const
{
return sqlite3_column_int64(stm_, col_);
}
/// Returns the value as an `double`.
double get_double() const
{
return sqlite3_column_double(stm_, col_);
}
/// Returns the value as text, i.e. a string_view. Note that this value may be invalidated`.
BOOST_SQLITE_DECL
cstring_ref get_text() const;
/// Returns the value as blob, i.e. raw memory. Note that this value may be invalidated`.
BOOST_SQLITE_DECL
blob_view get_blob() const;
/// Returns the field as a value.
value get_value() const
{
return value(sqlite3_column_value(stm_, col_));
}
/// Returns the name of the column.
cstring_ref column_name() const
{
return sqlite3_column_name(stm_, col_);
}
/// Returns the name of the table.
cstring_ref table_name() const
{
return sqlite3_column_table_name(stm_, col_);
}
/// Returns the name of the original data source.
cstring_ref column_origin_name() const
{
return sqlite3_column_origin_name(stm_, col_);
}
private:
friend struct row;
sqlite3_stmt * stm_;
int col_ = -1;
};
BOOST_SQLITE_END_NAMESPACE
#endif //BOOST_SQLITE_FIELD_HPP
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