ortfero / dataunits

C++17 header-only library to deal with data units: kilobytes, megabytes, etc.

dataunits

C++17 header only library to deal with data units: kilobytes, megabytes, etc.

Snippet

#include <iostream>
#include <cassert>
#include <dataunits/dataunits.hpp>

int main() {
  using namespace dataunits;  
  using namespace dataunits::literals;  

  constexpr auto limit = 2048_MiB;

  auto const maybe_limit = string_to_data<mebibytes>("2048 MiB");
  assert(!!maybe_limit);
  assert(limit == *maybe_limit);  
  assert(to_string(limit) == "2048 MiB");

  // Convert from MiB to GiB
  auto const limit_gb = data_cast<gibibytes>(limit);
  assert(limit_gb() == 2);
  assert(limit_gb.count() == 2);
  
  std::cout << limit_gb << std::endl; // Outputs: 2 GiB
  return 0;
}

Unit List

Type	Literal	Value	Type	Literal	Value
bytes	1_B	1
kilobytes	1_kB	1000	kibibytes	1_KiB	1024
megabytes	1_MB	1000^2	mebibytes	1_MiB	1024^2
gigabytes	1_GB	1000^3	gibibytes	1_GiB	1024^3
terabytes	1_TB	1000^4	tebibytes	1_TiB	1024^4
petabytes	1_PB	1000^5	pebibytes	1_PiB	1024^5
exabytes	1_EB	1000^6	exbibytes	1_EiB	1024^6

Differences from nholthaus/units

• Data units only
• An order of magnitude less (~430 sloc vs ~4300 sloc)
• Parsing units from std::string and std::string_view