KompexSQLiteBlob.h

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/*
    This file is part of Kompex SQLite Wrapper.
    Copyright (c) 2008-2015 Sven Broeske

    Kompex SQLite Wrapper 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 3 of the License, or
    (at your option) any later version.

    Kompex SQLite Wrapper 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 Kompex SQLite Wrapper. If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef KompexSQLiteBlob_H
#define KompexSQLiteBlob_H

#include "sqlite3.h"

#include "KompexSQLitePrerequisites.h"

namespace Kompex
{
    class SQLiteDatabase;

    enum BLOB_ACCESS_MODE
    {
        BLOB_READONLY = 0,
        BLOB_READWRITE
    };      

    class _SQLiteWrapperExport SQLiteBlob
    {
    public:
        SQLiteBlob();
        SQLiteBlob(SQLiteDatabase *db, std::string symbolicDatabaseName, std::string tableName, std::string columnName, int64 rowId, BLOB_ACCESS_MODE accessMode = BLOB_READWRITE);
        virtual ~SQLiteBlob();

        void OpenBlob(SQLiteDatabase *db, std::string symbolicDatabaseName, std::string tableName, std::string columnName, int64 rowId, BLOB_ACCESS_MODE accessMode = BLOB_READWRITE);
        
        void CloseBlob();

        int GetBlobSize() const;

        void ReadBlob(void *buffer, int numberOfBytes, int offset = 0);

        void WriteBlob(const void *buffer, int numberOfBytes, int offset = 0);

    protected:
        sqlite3_blob *GetBlobHandle() const {return mBlobHandle;}

    private:
        sqlite3_blob *mBlobHandle;
        SQLiteDatabase *mDatabase;

    };

};

#endif // KompexSQLiteBlob_H