uuid.h

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#ifndef SNIFF_UUID
#define SNIFF_UUID
 
#include <random>
#include <sstream>
 
namespace yarilo {
 
namespace uuid {
 
typedef std::string UUIDv4;
 
static std::random_device rd;
static std::mt19937 gen(rd());
static std::uniform_int_distribution<> dis(0, 15);
static std::uniform_int_distribution<> dis2(8, 11);
 
inline std::string generate_v4() {
  std::stringstream ss;
  int i;
  ss << std::hex;
  for (i = 0; i < 8; i++) {
    ss << dis(gen);
  }
  ss << "-";
  for (i = 0; i < 4; i++) {
    ss << dis(gen);
  }
  ss << "-4";
  for (i = 0; i < 3; i++) {
    ss << dis(gen);
  }
  ss << "-";
  ss << dis2(gen);
  for (i = 0; i < 3; i++) {
    ss << dis(gen);
  }
  ss << "-";
  for (i = 0; i < 12; i++) {
    ss << dis(gen);
  };
  return ss.str();
}
 
} // namespace uuid
 
} // namespace yarilo
 
#endif SNIFF_UUID