FileLoggerDevice.h++

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#ifndef __libquark_util_FileLoggerDevice_hxx
#define __libquark_util_FileLoggerDevice_hxx

#include <QFile>
#include <QIODevice>
#include <QScopedPointer>
#include <QString>

#include <quark/Quark.h++>

namespace quark {
namespace util {

class LIBQUARK_API FileLoggerDevice : public QIODevice
{
  public:

  FileLoggerDevice(const QString &directory, const QString &fileName,
                   qint64 maxFileSize = 1024 * 1024, int numBacklogFiles = 2);

  virtual ~FileLoggerDevice();

  virtual bool open(OpenMode mode);

  virtual void close();

  virtual bool isSequential() const;

  virtual qint64 bytesAvailable() const;

  static const char *LOG_FILE_EXTENSION;

  protected:

  virtual qint64 readData(char *data, qint64 maxlen);

  virtual qint64 writeData(const char *data, qint64 maxSize);

  private:

  bool rotateFiles();
  QString generateFilePath(int n = 0);

  QString _directory;
  QString _fileName;
  qint64 _maxFileSize;
  int _numBacklogFiles;
  QScopedPointer<QFile> _file;
  qint64 _fileSize;
};

} // namespace util
} // namespace quark

#endif // __libquark_util_FileLoggerDevice_hxx