xref: /third_party/benchmark/src/string_util.h (revision a8c51b3f) 
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/benchmark.h"
10#include "benchmark/export.h"
11#include "check.h"
12#include "internal_macros.h"
13
14namespace benchmark {
15
16BENCHMARK_EXPORT
17std::string HumanReadableNumber(double n, Counter::OneK one_k);
18
19BENCHMARK_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
25std::string
26StrFormat(const char* format, ...);
27
28inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
29  return out;
30}
31
32template <class First, class... Rest>
33inline 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
38template <class... Args>
39inline std::string StrCat(Args&&... args) {
40  std::ostringstream ss;
41  StrCatImp(ss, std::forward<Args>(args)...);
42  return ss.str();
43}
44
45BENCHMARK_EXPORT
46std::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 */
57unsigned long stoul(const std::string& str, size_t* pos = nullptr,
58                    int base = 10);
59int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
60double stod(const std::string& str, size_t* pos = nullptr);
61#else
62using std::stod;   // NOLINT(misc-unused-using-decls)
63using std::stoi;   // NOLINT(misc-unused-using-decls)
64using std::stoul;  // NOLINT(misc-unused-using-decls)
65#endif
66// NOLINTEND
67
68}  // end namespace benchmark
69
70#endif  // BENCHMARK_STRING_UTIL_H_
71