69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/*
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* ModelRailroadTimetablePlanner
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* Copyright 2016-2023, Filippo Gentile
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef IMAGEBLOBDEVICE_H
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#define IMAGEBLOBDEVICE_H
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#include <QIODevice>
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#include "metadatamanager.h"
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typedef struct sqlite3 sqlite3;
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typedef struct sqlite3_blob sqlite3_blob;
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namespace ImageMetaData {
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// TODO: move to utils
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class ImageBlobDevice : public QIODevice
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{
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Q_OBJECT
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public:
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ImageBlobDevice(sqlite3 *db, QObject *parent = nullptr);
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~ImageBlobDevice() override;
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void setBlobInfo(const QByteArray &table, const QByteArray &column, qint64 rowId);
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bool reserveSizeAndReset(qint64 len);
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virtual bool open(OpenMode mode) override;
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virtual void close() override;
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virtual qint64 size() const override;
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protected:
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virtual qint64 readData(char *data, qint64 maxlen) override;
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virtual qint64 writeData(const char *data, qint64 len) override;
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private:
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qint64 mRowId;
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qint64 mSize;
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sqlite3 *mDb;
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sqlite3_blob *mBlob;
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QByteArray mTable;
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QByteArray mColumn;
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};
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ImageBlobDevice *getImage(sqlite3pp::database &db, const MetaDataManager::Key &key);
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void setImage(sqlite3pp::database &db, const MetaDataManager::Key &key, const void *data, int size);
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} // namespace ImageMetaData
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#endif // IMAGEBLOBDEVICE_H
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