71 lines
2.8 KiB
C++
71 lines
2.8 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "Containers/UnrealString.h"
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/*
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double is a 64 bit IEEE 754 double precision Floating Point Number
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1 bit for the sign, 11 bits for the exponent, and 52* bits for the value
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15.5 decimal digits of precision (max value*: 4`503`599`627`370`495)
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|------------------------------------------------------------------------------
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| 900`000.000`000`001 --> up to 10 days with 1 ns precision
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| 90`000.000`000`000`1 --> up to 25 hours with 0.1 ns precision (100 ps)
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| 9`000.000`000`000`01 --> up to 2.5 hours with 0.01 ns precision (10 ps)
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| 900.000`000`000`001 --> up to 15 min with 1 ps precision
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|------------------------------------------------------------------------------
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| 3`600.000`000`000`001 --> 1 ps precision at 1 hour : NOT OK (16 digits)!!!
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| 86`400.000`000`000`001 --> 1 ps precision at 1 day : NOT OK (17 digits)!!!
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|------------------------------------------------------------------------------
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*/
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namespace TimeUtils
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{
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static constexpr double Picosecond = 0.000000000001;
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static constexpr double Nanosecond = 0.000000001;
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static constexpr double Microsecond = 0.000001;
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static constexpr double Milisecond = 0.001;
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static constexpr double Second = 1.0;
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static constexpr double Minute = 60.0;
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static constexpr double Hour = 3600.0;
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static constexpr double Day = 86400.0;
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static constexpr double Week = 604800.0;
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struct TRACEINSIGHTS_API FTimeSplit
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{
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union
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{
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int32 Units[8]; // Units[0] = Days, Units[1] = Hours, ..., Units[7] = Picoseconds
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struct
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{
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int32 Days;
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int32 Hours;
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int32 Minutes;
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int32 Seconds;
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int32 Miliseconds;
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int32 Microseconds;
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int32 Nanoseconds;
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int32 Picoseconds;
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};
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};
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bool bIsZero;
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bool bIsNegative;
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bool bIsInfinite;
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bool bIsNaN;
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};
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TRACEINSIGHTS_API FString FormatTimeValue(const double Duration, const int32 NumDigits = 1);
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TRACEINSIGHTS_API FString FormatTimeAuto(const double Duration, const int32 NumDigits = 1);
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TRACEINSIGHTS_API FString FormatTimeMs(const double Duration, const int32 NumDigits = 2, bool bAddTimeUnit = false);
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TRACEINSIGHTS_API FString FormatTime(const double Time, const double Precision = 0.0);
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TRACEINSIGHTS_API FString FormatTimeHMS(const double Time, const double Precision = 0.0);
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TRACEINSIGHTS_API void SplitTime(const double Time, FTimeSplit& OutTimeSplit);
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TRACEINSIGHTS_API FString FormatTimeSplit(const FTimeSplit& TimeSplit, const double Precision = 0.0);
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TRACEINSIGHTS_API FString FormatTimeSplit(const double Time, const double Precision = 0.0);
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void TestTimeFormatting();
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void TestTimeAutoFormatting();
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void TestOptimizationIssue();
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} // namespace TimeUtils
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