benchmark  1.7.1
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 #include <vector>
8 
9 #include "benchmark/export.h"
10 #include "check.h"
11 #include "internal_macros.h"
12 
13 namespace benchmark {
14 
15 void AppendHumanReadable(int n, std::string* str);
16 
17 std::string HumanReadableNumber(double n, double one_k = 1024.0);
18 
19 BENCHMARK_EXPORT
20 #if defined(__MINGW32__)
21 __attribute__((format(__MINGW_PRINTF_FORMAT, 1, 2)))
22 #elif defined(__GNUC__)
23 __attribute__((format(printf, 1, 2)))
24 #endif
25 std::string
26 StrFormat(const char* format, ...);
27 
28 inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
29  return out;
30 }
31 
32 template <class First, class... Rest>
33 inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
34  out << std::forward<First>(f);
35  return StrCatImp(out, std::forward<Rest>(rest)...);
36 }
37 
38 template <class... Args>
39 inline std::string StrCat(Args&&... args) {
40  std::ostringstream ss;
41  StrCatImp(ss, std::forward<Args>(args)...);
42  return ss.str();
43 }
44 
45 BENCHMARK_EXPORT
46 std::vector<std::string> StrSplit(const std::string& str, char delim);
47 
48 // Disable lint checking for this block since it re-implements C functions.
49 // NOLINTBEGIN
50 #ifdef BENCHMARK_STL_ANDROID_GNUSTL
51 /*
52  * GNU STL in Android NDK lacks support for some C++11 functions, including
53  * stoul, stoi, stod. We reimplement them here using C functions strtoul,
54  * strtol, strtod. Note that reimplemented functions are in benchmark::
55  * namespace, not std:: namespace.
56  */
57 unsigned long stoul(const std::string& str, size_t* pos = nullptr,
58  int base = 10);
59 int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
60 double stod(const std::string& str, size_t* pos = nullptr);
61 #else
62 using std::stod; // NOLINT(misc-unused-using-decls)
63 using std::stoi; // NOLINT(misc-unused-using-decls)
64 using std::stoul; // NOLINT(misc-unused-using-decls)
65 #endif
66 // NOLINTEND
67 
68 } // end namespace benchmark
69 
70 #endif // BENCHMARK_STRING_UTIL_H_