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#ifndef TEACH_OS_KERNEL_FILESYSTEM_DEVICE_FILE_HPP
#define TEACH_OS_KERNEL_FILESYSTEM_DEVICE_FILE_HPP
#include "devices/block_device.hpp"
#include "devices/device.hpp"
#include "filesystem/file.hpp"
#include <cstddef>
namespace filesystem
{
struct device_file : file
{
explicit device_file(devices::device * device);
auto open() -> void override;
auto read(void * buffer, size_t offset, size_t size) const -> size_t override;
auto write(void const * buffer, size_t offset, size_t size) -> size_t override;
private:
using block_op = void (*)(size_t idx, size_t off, size_t len, size_t done, devices::block_device * device,
std::byte * scratch, void * buffer);
auto process_blocks(size_t offset, size_t size, void * buffer, block_op op) const -> size_t;
devices::device * m_device;
};
} // namespace filesystem
#endif
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