#ifndef RAII_BINARY_HPP
#define RAII_BINARY_HPP

#include <cstdlib> //size_t
#include <utility> //move
#include <cstring> //memcpy
#include <new>

namespace raii{

	namespace detail{

		template<size_t Alignment>
		struct default_binary_allocator{
			static void free(void* data){
				::operator delete(data);
			}
			static void* allocate(size_t size){
				return ::operator new(size, std::align_val_t(Alignment));
			}
			static void* copy(const void* c, size_t size){
				char* tmp = reinterpret_cast<char*>(allocate(size));
				memcpy(tmp, c, size);
				return tmp;
			}
		};

	}

	class binary_base
	{
	protected:
		char* m_data = nullptr;
		size_t m_size = 0;
		size_t m_cap = 0;
	public:
		constexpr binary_base(void) = default;
		constexpr binary_base(char* data, size_t size):
			m_data(data), m_size(size){}
	protected:
		template<class Allocator>
		binary_base(const binary_base& b):
			m_data(Allocator::copy(b.m_data, b.m_cap)),
			m_size(b.m_size),
			m_cap(b.m_cap){}
		binary_base(binary_base&&);
	public:
		~binary_base(void) = default;

		char* release(void);

		constexpr size_t size(void)const{return m_size;}
		constexpr size_t capacity(void)const{return m_cap;}
		constexpr char* get(void){return m_data;}
		constexpr const char* get(void)const{return m_data;}
		constexpr operator bool(void)const{return m_data;}

		char& operator[](size_t i);
		const char& operator[](size_t i)const;

	};
	template<class Allocator = detail::default_binary_allocator<0>>
	class binary : public binary_base
	{
	public:
		constexpr binary(void) = default;
		binary(char* data, size_t size):
			binary_base(Allocator::copy(data, size), size){}
		binary(size_t size):
			binary_base(Allocator::allocate(size), size){}
		binary(const binary& b):
			binary_base(b)
		{
			m_data = Allocator::copy(b.m_data, b.m_cap);
		}
		binary(binary&& b):
			binary_base(std::move(b)){}
		~binary(void){
			Allocator::free(m_data);
		}
		binary& operator=(const binary& b){
			binary tmp(b);
			return (*this = std::move(tmp));
		}
		binary& operator=(binary&& b){
			m_size = b.m_size;
			m_cap = b.m_cap;
			std::swap(m_data, b.m_data);
			return *this;
		}
		void reset(void){
			Allocator::free(m_data);
			m_data = nullptr;
			m_cap = m_size = 0;
		}
		void reset(char* val, size_t cap, size_t size = 0){
			Allocator::free(m_data);
			m_data = val;
			m_cap = cap;
			m_size = size;
		}
		bool resize(size_t newsize){
			if(newsize < m_cap)
				return false;
			binary tmp(newsize);
			if(!tmp)
				return false;
			memcpy(tmp.m_data, m_data, m_size);
			*this = std::move(tmp);
			return true;
		}
	};

}

#endif