1 //===- Support/Chrono.cpp - Utilities for Timing Manipulation ---*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/Support/Chrono.h" 11 #include "llvm/Config/config.h" 12 #include "llvm/Support/Format.h" 13 #include "llvm/Support/raw_ostream.h" 14 15 namespace llvm { 16 17 using namespace sys; 18 19 const char llvm::detail::unit<std::ratio<3600>>::value[] = "h"; 20 const char llvm::detail::unit<std::ratio<60>>::value[] = "m"; 21 const char llvm::detail::unit<std::ratio<1>>::value[] = "s"; 22 const char llvm::detail::unit<std::milli>::value[] = "ms"; 23 const char llvm::detail::unit<std::micro>::value[] = "us"; 24 const char llvm::detail::unit<std::nano>::value[] = "ns"; 25 26 static inline struct tm getStructTM(TimePoint<> TP) { 27 struct tm Storage; 28 std::time_t OurTime = toTimeT(TP); 29 30 #if defined(LLVM_ON_UNIX) 31 struct tm *LT = ::localtime_r(&OurTime, &Storage); 32 assert(LT); 33 (void)LT; 34 #endif 35 #if defined(_WIN32) 36 int Error = ::localtime_s(&Storage, &OurTime); 37 assert(!Error); 38 (void)Error; 39 #endif 40 41 return Storage; 42 } 43 44 raw_ostream &operator<<(raw_ostream &OS, TimePoint<> TP) { 45 struct tm LT = getStructTM(TP); 46 char Buffer[sizeof("YYYY-MM-DD HH:MM:SS")]; 47 strftime(Buffer, sizeof(Buffer), "%Y-%m-%d %H:%M:%S", <); 48 return OS << Buffer << '.' 49 << format("%.9lu", 50 long((TP.time_since_epoch() % std::chrono::seconds(1)) 51 .count())); 52 } 53 54 void format_provider<TimePoint<>>::format(const TimePoint<> &T, raw_ostream &OS, 55 StringRef Style) { 56 using namespace std::chrono; 57 TimePoint<seconds> Truncated = time_point_cast<seconds>(T); 58 auto Fractional = T - Truncated; 59 struct tm LT = getStructTM(Truncated); 60 // Handle extensions first. strftime mangles unknown %x on some platforms. 61 if (Style.empty()) Style = "%Y-%m-%d %H:%M:%S.%N"; 62 std::string Format; 63 raw_string_ostream FStream(Format); 64 for (unsigned I = 0; I < Style.size(); ++I) { 65 if (Style[I] == '%' && Style.size() > I + 1) switch (Style[I + 1]) { 66 case 'L': // Milliseconds, from Ruby. 67 FStream << llvm::format( 68 "%.3lu", (long)duration_cast<milliseconds>(Fractional).count()); 69 ++I; 70 continue; 71 case 'f': // Microseconds, from Python. 72 FStream << llvm::format( 73 "%.6lu", (long)duration_cast<microseconds>(Fractional).count()); 74 ++I; 75 continue; 76 case 'N': // Nanoseconds, from date(1). 77 FStream << llvm::format( 78 "%.6lu", (long)duration_cast<nanoseconds>(Fractional).count()); 79 ++I; 80 continue; 81 case '%': // Consume %%, so %%f parses as (%%)f not %(%f) 82 FStream << "%%"; 83 ++I; 84 continue; 85 } 86 FStream << Style[I]; 87 } 88 FStream.flush(); 89 char Buffer[256]; // Should be enough for anywhen. 90 size_t Len = strftime(Buffer, sizeof(Buffer), Format.c_str(), <); 91 OS << (Len ? Buffer : "BAD-DATE-FORMAT"); 92 } 93 94 } // namespace llvm 95