qt/FileMapper.h

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#pragma once
#include <QTemporaryFile>
#include <misc/gen/IFileMapper.h>
#include <misc/global.h>
 
namespace sf::qt
{
 
class _MISC_CLASS FileMapper : public IFileMapper
{
  public:
    FileMapper();
 
    FileMapper(const QString& filepath, qint64 ofs, qint64 sz);
 
    void initialize() override;
 
    void initialize(const QString& filepath, qint64 ofs, qint64 sz);
 
    void setView(qint64 ofs, qint64 sz);
 
    ~FileMapper() override;
 
    void createView(size_t sz) override;
 
    void* getPtr() override;
    bool mapView() override;
    bool unmapView() override;
 
    QFile& getFile();
 
  private:
    QTemporaryFile _file;
    uchar* _ptr{nullptr};
    qint64 _offset{0};
    qint64 _size{0};
};
 
}// namespace sf::qt