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#ifndef QTIOCOMPRESSOR_H
#define QTIOCOMPRESSOR_H

#include <QIODevice>

#if defined(Q_WS_WIN)
#  if !defined(QT_QTIOCOMPRESSOR_EXPORT) && !defined(QT_QTIOCOMPRESSOR_IMPORT)
#    define QT_QTIOCOMPRESSOR_EXPORT
#  elif defined(QT_QTIOCOMPRESSOR_IMPORT)
#    if defined(QT_QTIOCOMPRESSOR_EXPORT)
#      undef QT_QTIOCOMPRESSOR_EXPORT
#    endif
#    define QT_QTIOCOMPRESSOR_EXPORT __declspec(dllimport)
#  elif defined(QT_QTIOCOMPRESSOR_EXPORT)
#    undef QT_QTIOCOMPRESSOR_EXPORT
#    define QT_QTIOCOMPRESSOR_EXPORT __declspec(dllexport)
#  endif
#else
#  define QT_QTIOCOMPRESSOR_EXPORT
#endif

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

#endif
