StorageIF.hpp

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#ifndef __HRCORE_STORAGEIF__HPP__
#define __HRCORE_STORAGEIF__HPP__
 
#include "../HRCore.h"
 
namespace HRCore {
 
namespace Storage {
 
    class Interface {
    public:
 
        struct item_t {
            ival_t* data = nullptr;
 
            explicit operator bool() const noexcept { return (data != nullptr); }
        protected:
            void* appendix = nullptr;
 
            size_t index = 0;
        };
 
        virtual item_t begin() = 0;
 
        virtual item_t end() = 0;
 
        virtual item_t next(item_t cur) = 0;
 
        virtual item_t prev(item_t cur) = 0;
 
        virtual item_t at(size_t pos) = 0;
 
        virtual size_t length() = 0;
 
        virtual bool shrink(size_t len) = 0;
 
        virtual bool extend(size_t len) = 0;
 
        virtual Interface* newObject() = 0;
 
        virtual void delObject(const Interface* ptr) = 0;
        
    };
 
}
}
 
#endif