bind.hpp

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//
//  M A R I A D B + +
//
//          Copyright Sylvain Rochette Langlois 2013,
//                    The ViaDuck Project 2016 - 2018.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE or copy at
//          http://www.boost.org/LICENSE_1_0.txt)

#ifndef _MARIADB_BIND_HPP_
#define _MARIADB_BIND_HPP_

#include <mysql.h>
#include <mariadb++/types.hpp>
#include <mariadb++/data.hpp>

namespace mariadb {
class statement;
class result_set;
class bind {
    friend class statement;
    friend class result_set;

   public:
    /**
     * Construct a parameter bind
     */
    explicit bind(MYSQL_BIND *mysql_bind);

    /**
     * Construct a result bind for given field type
     */
    bind(MYSQL_BIND *mysql_bind, MYSQL_FIELD *mysql_field);

    /*
     * Disallow copying and moving of a bind:
     * As the bind can set its union as the bind "buffer", copying the bind would change the address of the union
     */
    bind(const bind &) = delete;
    bind(bind &&) = delete;
    bind &operator=(const bind &) = delete;
    bind &operator=(bind &&) = delete;

    char* buffer() const;

    long unsigned int length() const;

    bool is_null() const;

    void set(enum_field_types type, const char* buffer = nullptr, unsigned long length = 0, bool us = false);

   private:
    MYSQL_BIND* m_bind;
    MYSQL_TIME m_time;

    my_bool m_is_null;
    my_bool m_error;

    data_ref m_data;

    union {
        u64 m_unsigned64;
        s64 m_signed64;
        s32 m_signed32[2];
        f64 m_double64;
        f32 m_float32[2];
        u8  m_uchar8[4];
    };
};

    using bind_ref = std::unique_ptr<bind>;
}

#endif