1 //===- Support/Chrono.cpp - Utilities for Timing Manipulation ---*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #include "llvm/Support/Chrono.h"
10 #include "llvm/Config/llvm-config.h"
11 #include "llvm/Support/Format.h"
12 #include "llvm/Support/raw_ostream.h"
18 const char llvm::detail::unit<std::ratio<3600>>::value[] = "h";
19 const char llvm::detail::unit<std::ratio<60>>::value[] = "m";
20 const char llvm::detail::unit<std::ratio<1>>::value[] = "s";
21 const char llvm::detail::unit<std::milli>::value[] = "ms";
22 const char llvm::detail::unit<std::micro>::value[] = "us";
23 const char llvm::detail::unit<std::nano>::value[] = "ns";
25 static inline struct tm getStructTM(TimePoint<> TP) {
27 std::time_t OurTime = toTimeT(TP);
29 #if defined(LLVM_ON_UNIX)
30 struct tm *LT = ::localtime_r(&OurTime, &Storage);
35 int Error = ::localtime_s(&Storage, &OurTime);
43 raw_ostream &operator<<(raw_ostream &OS, TimePoint<> TP) {
44 struct tm LT = getStructTM(TP);
45 char Buffer[sizeof("YYYY-MM-DD HH:MM:SS")];
46 strftime(Buffer, sizeof(Buffer), "%Y-%m-%d %H:%M:%S", <);
47 return OS << Buffer << '.'
49 long((TP.time_since_epoch() % std::chrono::seconds(1))
53 void format_provider<TimePoint<>>::format(const TimePoint<> &T, raw_ostream &OS,
55 using namespace std::chrono;
56 TimePoint<seconds> Truncated = time_point_cast<seconds>(T);
57 auto Fractional = T - Truncated;
58 struct tm LT = getStructTM(Truncated);
59 // Handle extensions first. strftime mangles unknown %x on some platforms.
60 if (Style.empty()) Style = "%Y-%m-%d %H:%M:%S.%N";
62 raw_string_ostream FStream(Format);
63 for (unsigned I = 0; I < Style.size(); ++I) {
64 if (Style[I] == '%' && Style.size() > I + 1) switch (Style[I + 1]) {
65 case 'L': // Milliseconds, from Ruby.
66 FStream << llvm::format(
67 "%.3lu", (long)duration_cast<milliseconds>(Fractional).count());
70 case 'f': // Microseconds, from Python.
71 FStream << llvm::format(
72 "%.6lu", (long)duration_cast<microseconds>(Fractional).count());
75 case 'N': // Nanoseconds, from date(1).
76 FStream << llvm::format(
77 "%.6lu", (long)duration_cast<nanoseconds>(Fractional).count());
80 case '%': // Consume %%, so %%f parses as (%%)f not %(%f)
88 char Buffer[256]; // Should be enough for anywhen.
89 size_t Len = strftime(Buffer, sizeof(Buffer), Format.c_str(), <);
90 OS << (Len ? Buffer : "BAD-DATE-FORMAT");