print_size.hh
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			#include <array>
			#include <cmath>
			#include <iomanip>
			#include <sstream>
			#include <stdexcept>
			#include <string>
			#include <tuple>

			#ifndef PRINT_SIZE_H_
			#define PRINT_SIZE_H_

			template <class T>
			inline std::string printHuman(T size, std::string unit, char base = 10) {
			int mult = 0;
			int fact = base == 10 ? 3 : 10;
			if (size != 0) {
			mult = std::floor((std::log(double(size)) / std::log(double(base))) / fact);
			}

			auto real_size = double(size) / double(std::pow(base, fact * mult));
			std::array<std::string, 12> ratio = {"n", u8"μ", "m", "", "K", "M",
			"G", "T", "P", "E", "Z", "Y"};

			std::string base_2_correction;
			if (base == 2 and ratio[mult + 3] != "") {
			base_2_correction = "i";
			}

			std::stringstream sstr;
			sstr << std::fixed << std::setprecision(1) << real_size << ratio[mult + 3]
			<< base_2_correction << unit;
			return sstr.str();
			}

			#endif // PRINT_SIZE_H_

R11821/examples/mpi/print_size.hh9182053b46ccmaster