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