Encoded_File.h

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#ifndef joedb_Encoded_File_declared
#define joedb_Encoded_File_declared
 
#include "joedb/journal/Readonly_Encoded_File.h"
#include "joedb/journal/Codec.h"
#include "joedb/db/encoded_file/Writable_Database.h"
 
namespace joedb
{
 /// @ingroup journal
 class Encoded_File: public Readonly_Encoded_File
 {
  private:
   db::encoded_file::Writable_Database &db;
   Codec &codec;
 
   static constexpr size_t write_buffer_capacity = 1 << 20;
   static_assert(write_buffer_capacity <= max_buffer_size);
   std::vector<char> write_buffer;
   int64_t write_buffer_offset;
   mutable size_t write_buffer_size;
 
   void write_blob(std::string_view buffer, int64_t offset) const;
   void flush_write_buffer() const;
 
  public:
   Encoded_File
   (
    Codec &codec,
    db::encoded_file::Writable_Database &db
   );
 
   size_t pread(char *buffer, size_t size, int64_t offset) const override;
   void pwrite(const char *buffer, size_t size, int64_t offset) override;
   int64_t get_size() const override;
   void sync() override;
 
   ~Encoded_File();
 };
}
 
#endif