third-party/benchmark/src/string_util.h

   1 #ifndef BENCHMARK_STRING_UTIL_H_
   2 #define BENCHMARK_STRING_UTIL_H_
   3
   4 #include <sstream>
   5 #include <string>
   6 #include <utility>
   7
   8 #include "internal_macros.h"
   9
  10 namespace benchmark {
  11
  12 void AppendHumanReadable(int n, std::string* str);
  13
  14 std::string HumanReadableNumber(double n, double one_k = 1024.0);
  15
  16 #if defined(__MINGW32__)
  17 __attribute__((format(__MINGW_PRINTF_FORMAT, 1, 2)))
  18 #elif defined(__GNUC__)
  19 __attribute__((format(printf, 1, 2)))
  20 #endif
  21 std::string
  22 StrFormat(const char* format, ...);
  23
  24 inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
  25   return out;
  26 }
  27
  28 template <class First, class... Rest>
  29 inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
  30   out << std::forward<First>(f);
  31   return StrCatImp(out, std::forward<Rest>(rest)...);
  32 }
  33
  34 template <class... Args>
  35 inline std::string StrCat(Args&&... args) {
  36   std::ostringstream ss;
  37   StrCatImp(ss, std::forward<Args>(args)...);
  38   return ss.str();
  39 }
  40
  41 std::vector<std::string> StrSplit(const std::string& str, char delim);
  42
  43 // Disable lint checking for this block since it re-implements C functions.
  44 // NOLINTBEGIN
  45 #ifdef BENCHMARK_STL_ANDROID_GNUSTL
  46 /*
  47  * GNU STL in Android NDK lacks support for some C++11 functions, including
  48  * stoul, stoi, stod. We reimplement them here using C functions strtoul,
  49  * strtol, strtod. Note that reimplemented functions are in benchmark::
  50  * namespace, not std:: namespace.
  51  */
  52 unsigned long stoul(const std::string& str, size_t* pos = nullptr,
  53                     int base = 10);
  54 int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
  55 double stod(const std::string& str, size_t* pos = nullptr);
  56 #else
  57 using std::stod;   // NOLINT(misc-unused-using-decls)
  58 using std::stoi;   // NOLINT(misc-unused-using-decls)
  59 using std::stoul;  // NOLINT(misc-unused-using-decls)
  60 #endif
  61 // NOLINTEND
  62
  63 }  // end namespace benchmark
  64
  65 #endif  // BENCHMARK_STRING_UTIL_H_