sql_buffer.h

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/***********************************************************************
 Copyright (c) 2007-2008 by Educational Technology Resources, Inc. and
 (c) 2007 by Jonathan Wakely.  Others may also hold copyrights on
 code in this file.  See the CREDITS.txt file in the top directory
 of the distribution for details.

 This file is part of MySQL++.

 MySQL++ is free software; you can redistribute it and/or modify it
 under the terms of the GNU Lesser General Public License as published
 by the Free Software Foundation; either version 2.1 of the License, or
 (at your option) any later version.

 MySQL++ 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 Lesser General Public
 License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with MySQL++; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 USA
***********************************************************************/

#if !defined(MYSQLPP_SQL_BUFFER_H)
#define MYSQLPP_SQL_BUFFER_H

#include "refcounted.h"
#include "type_info.h"

#include <string>

namespace mysqlpp {


class SQLBuffer
{
public:
        typedef size_t size_type;

        SQLBuffer(const char* data, size_type length, mysql_type_info type,
                        bool is_null) : data_(), length_(), type_(type),
                        is_null_(is_null)
                        { replace_buffer(data, length); }

        SQLBuffer(const std::string& s, mysql_type_info type, bool is_null) :
                        data_(), length_(), type_(type), is_null_(is_null)
        {
                replace_buffer(s.data(), static_cast<size_type>(s.length()));
        }

        ~SQLBuffer() { delete[] data_; }

        SQLBuffer& assign(const char* data, size_type length,
                        mysql_type_info type = mysql_type_info::string_type,
                        bool is_null = false);

        SQLBuffer& assign(const std::string& s,
                        mysql_type_info type = mysql_type_info::string_type,
                        bool is_null = false);

        const char* data() const { return data_; }

        bool escape_q() const { return type_.escape_q(); }

        size_type length() const { return length_; }

        bool is_string() { return type_ == mysql_type_info::string_type; }

        bool is_null() const { return is_null_; }

        bool quote_q() const;

        void set_null() { is_null_ = true; }

        const mysql_type_info& type() const { return type_; }

private:
        SQLBuffer(const SQLBuffer&);
        SQLBuffer& operator=(const SQLBuffer&);

        void init(const char* pd, size_type len, mysql_type_info type,
                        bool is_null);
        void replace_buffer(const char* pd, size_type length);

        const char* data_;              
        size_type length_;              
        mysql_type_info type_;  
        bool is_null_;                  
};


typedef RefCountedPointer<SQLBuffer> RefCountedBuffer;

} // end namespace mysqlpp

#endif // !defined(MYSQLPP_SQL_BUFFER_H)