Readonly_Encoded_File.h

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#ifndef joedb_Readonly_Encoded_File_declared
#define joedb_Readonly_Encoded_File_declared
 
#include "joedb/db/encoded_file/Database.h"
#include "joedb/journal/Abstract_File.h"
#include "joedb/journal/Decoder.h"
 
namespace joedb
{
 /// @ingroup journal
 class Readonly_Encoded_File: public Abstract_File
 {
  private:
   const db::encoded_file::Database &db;
   const Abstract_File &blob_reader;
 
   mutable std::vector<char> read_buffer;
   mutable db::encoded_file::id_of_buffer decoded_buffer;
 
  protected:
   static constexpr size_t max_buffer_size = 1 << 24;
 
   Decoder &decoder;
 
   size_t pread(char * buffer, size_t size, int64_t offset) const override;
 
   Readonly_Encoded_File
   (
    Decoder &decoder,
    const db::encoded_file::Database &db,
    const Abstract_File &blob_reader,
    Open_Mode mode
   );
 
  public:
   Readonly_Encoded_File
   (
    Decoder &decoder,
    const db::encoded_file::Database &db,
    const Abstract_File &blob_reader
   );
 
   int64_t get_size() const override;
 };
}
 
#endif