.. _program_listing_file_disk_io.hpp:

Program Listing for File disk_io.hpp
====================================

|exhale_lsh| :ref:`Return to documentation for file <file_disk_io.hpp>` (``disk_io.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef FELIX_DISKIO_H_
   #define FELIX_DISKIO_H_
   
   #include <string>
   #include <string_view>
   
   std::string errno_msg(int errn);
   
   class DiskIO
   {
       public:
           static constexpr std::string_view FREAD = "r";
           static constexpr std::string_view FWRITE = "w+";
   
           DiskIO(const std::string& filename, size_t block_size, std::string_view op, bool is_fifo);
   
           DiskIO(const DiskIO &) = delete;
           DiskIO &operator=(const DiskIO &) = delete;
   
           ~DiskIO();
   
           size_t block_read(void *to_read, size_t max_blocks);
   
           size_t block_write(const void *to_write, size_t max_blocks);
   
           size_t byte_read(void* to_read, size_t bytes);
   
           size_t byte_write(void* to_write, size_t bytes);
   
           bool is_eof();
   
           int reset_position();
   
       private:
           std::string m_filename{};
           size_t m_block_size{0};
           int m_fd{-1};
           FILE* m_fstream{nullptr};
   
           void open_file(std::string_view op);
           void open_fifo(std::string_view op);
   };
   
   
   #endif /* FELIX_DISKIO_H_ */