string_util.h

#ifndef BENCHMARK_STRING_UTIL_H_
#define BENCHMARK_STRING_UTIL_H_
 
#include <sstream>
#include <string>
#include <utility>
#include <vector>
 
#include "benchmark/counter.h"
#include "benchmark/export.h"
#include "check.h"
 
namespace benchmark {
 
BENCHMARK_EXPORT
std::string HumanReadableNumber(double n, Counter::OneK one_k,
                                bool stringify_exponent = false);
 
BENCHMARK_EXPORT
std::string StrFormat(const char* format, ...) PRINTF_FORMAT_STRING_FUNC(1, 2);
 
inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
  return out;
}
 
template <class First, class... Rest>
inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
  out << std::forward<First>(f);
  return StrCatImp(out, std::forward<Rest>(rest)...);
}
 
template <class... Args>
inline std::string StrCat(Args&&... args) {
  std::ostringstream ss;
  StrCatImp(ss, std::forward<Args>(args)...);
  return ss.str();
}
 
BENCHMARK_EXPORT
std::vector<std::string> StrSplit(const std::string& str, char delim);
 
// Disable lint checking for this block since it re-implements C functions.
// NOLINTBEGIN
#ifdef BENCHMARK_STL_ANDROID_GNUSTL
/*
 * GNU STL in Android NDK lacks support for some C++11 functions, including
 * stoul, stoi, stod. We reimplement them here using C functions strtoul,
 * strtol, strtod. Note that reimplemented functions are in benchmark::
 * namespace, not std:: namespace.
 */
unsigned long stoul(const std::string& str, size_t* pos = nullptr,
                    int base = 10);
int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
double stod(const std::string& str, size_t* pos = nullptr);
#else
using std::stod;   // NOLINT(misc-unused-using-decls)
using std::stoi;   // NOLINT(misc-unused-using-decls)
using std::stoul;  // NOLINT(misc-unused-using-decls)
#endif
// NOLINTEND
 
}  // end namespace benchmark
 
#endif  // BENCHMARK_STRING_UTIL_H_