
/****************************************************************************
** dtkIOCompressor: this is just a renaming of qtiocompressor.
** Plus small modification of the constructor (detect if gzip file)
** update by: Nicolas Niclausse
*/

/****************************************************************************
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#pragma once

#include <dtkCoreExport.h>

#include <QIODevice>


class dtkIOCompressorPrivate;
class DTKCORE_EXPORT dtkIOCompressor : public QIODevice
{
    Q_OBJECT
public:
    enum StreamFormat { ZlibFormat, GzipFormat, RawZipFormat };
    dtkIOCompressor(QIODevice *device, int compressionLevel = 6, int bufferSize = 65500);
    ~dtkIOCompressor();
    void setStreamFormat(StreamFormat format);
    StreamFormat streamFormat() const;
    static bool isGzipSupported();
    bool isSequential() const;
    bool open(OpenMode mode);
    void close();
    void flush();
    qint64 bytesAvailable() const;
protected:
    qint64 readData(char *data, qint64 maxSize);
    qint64 writeData(const char *data, qint64 maxSize);
private:
    static bool checkGzipSupport(const char *const versionString);
    dtkIOCompressorPrivate *d_ptr;
    Q_DECLARE_PRIVATE(dtkIOCompressor)
    Q_DISABLE_COPY(dtkIOCompressor)
};
