socket/BigInt.hpp

#ifndef BIG_INT_HPP
#define BIG_INT_HPP
#include "semi_bitset.hpp"
#include <cstdlib>
template<size_t size>
class BigInt{
private:
	int signum = 1;
	semi_bitset<size, size >= 1000> bits;
public:
	inline BigInt(){
		
	}
	inline BigInt(int o){
		if(o < 0){signum = -1;o *= -1;}
		bits.data[bits.length() - 1] = (unsigned int)o;
	}
	inline BigInt(unsigned int o){
		bits.data[bits.length() - 1] = o;
	}
	inline BigInt(long long o){
		if(o < 0){signum = -1;o *= -1;}
		bits.data[bits.length() - 1] = (lower_half);
		bits.data[bits.length() - 2] = (o >> 32);
	}
	inline BigInt(unsigned long long o){
		bits.data[bits.length() - 1] = (o & lower_half);
		bits.data[bits.length() - 2] = (o >> 32);
	}
	template<std::size_t osize>
	BigInt<size> add(const BigInt<osize>& o)const{
		static_assert(size == osize);
		BigInt<size> ret;
		uint64_t carry = 0;
		for(size_t i = size - 1;i >= 0;i--){
			uint64_t res = (*this)[i] + o[i] + carry;
			carry = (res >> 32);
			ret[i] = res & lower_half;
			if(i == 0)break;
		}
		return ret;
	}
	
	BigInt<size> div(unsigned int o)const{
		uint64_t carry = 0;
		BigInt<size> ret;
		for(size_t i = 0;i < size;i++){
			lldiv_t dm = std::div((unsigned long long int)((carry << 32) + (*this)[i]),(unsigned long long int)o);
			carry = dm.rem;
			std::cout << " " << dm.rem << " ";
			ret[i] = dm.quot;
		}
		return ret;
	}
	unsigned int mod(unsigned int o)const{
		uint64_t carry = 0;
		for(size_t i = 0;i < size;i++){
			lldiv_t dm = std::div((long long int)((carry << 32) + (*this)[i]),(unsigned long long int)o);
			carry = dm.rem;
		}
		return (unsigned int)(carry & lower_half);
	}
	std::uint64_t& operator[](size_t i){
		return bits.data[i];
	}
	
	const std::uint64_t& operator[](size_t i)const{
		return bits.data[i];
	}
	template<typename stream, size_t osize>
	inline friend stream& operator<<(stream& s, const BigInt<osize>& o){
		for(size_t i = 0;i < o.bits.length();i++)
			s << std::bitset<32>((uint32_t)(o.bits.data[i] & lower_half));
		return s;
	}
};
#endif