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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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156 lines
3.3 KiB
ObjectPascal
156 lines
3.3 KiB
ObjectPascal
{
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*****************************************************************************
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This file is part of LazUtils.
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See the file COPYING.modifiedLGPL.txt, included in this distribution,
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for details about the license.
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*****************************************************************************
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}
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unit LazSysUtils;
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{$mode objfpc}{$H+}
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interface
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uses
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SysUtils;
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function NowUTC: TDateTime;
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function GetTickCount64: QWord;
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implementation
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uses
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{$IFDEF Windows}
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Windows,
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{$ELSE}
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{$IFnDEF HASAMIGA}
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Unix, BaseUnix,
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{$If defined(Linux) and (FPC_FULLVERSION<30000)}
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Linux,
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{$EndIf}
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{$ENDIF}
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{$ENDIF}
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Classes;
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{$IF FPC_FULLVERSION>=30000}
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function GetTickCount64: QWord;
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begin
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Result := SysUtils.GetTickCount64;
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end;
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{$ENDIF}
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// ToDo: Move the code to 1 include file per platform
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{$IFDEF WINDOWS}
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function NowUTC: TDateTime;
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var
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SystemTime: TSystemTime;
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begin
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windows.GetSystemTime(SystemTime{%H-});
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result := systemTimeToDateTime(SystemTime);
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end;
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{$IF FPC_FULLVERSION<30000}
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function GetTickCount64: QWord;
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begin
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// GetTickCount64 is better, but we need to check the Windows version to use it
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Result := Windows.GetTickCount();
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end;
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{$ENDIF FPC_FULLVERSION}
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{$ELSE WINDOWS}
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{$IFDEF UNIX}
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Const
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{Date Translation}
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C1970=2440588;
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D0 = 1461;
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D1 = 146097;
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D2 =1721119;
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Procedure JulianToGregorian(JulianDN:LongInt;out Year,Month,Day:Word);
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Var
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YYear,XYear,Temp,TempMonth : LongInt;
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Begin
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Temp:=((JulianDN-D2) shl 2)-1;
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JulianDN:=Temp Div D1;
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XYear:=(Temp Mod D1) or 3;
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YYear:=(XYear Div D0);
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Temp:=((((XYear mod D0)+4) shr 2)*5)-3;
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Day:=((Temp Mod 153)+5) Div 5;
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TempMonth:=Temp Div 153;
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If TempMonth>=10 Then
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Begin
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inc(YYear);
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dec(TempMonth,12);
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End;
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inc(TempMonth,3);
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Month := TempMonth;
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Year:=YYear+(JulianDN*100);
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end;
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Procedure EpochToLocal(epoch:longint;out year,month,day,hour,minute,second:Word);
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{
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Transforms Epoch time into local time (hour, minute,seconds)
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}
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Var
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DateNum: LongInt;
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Begin
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Datenum:=(Epoch Div 86400) + c1970;
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JulianToGregorian(DateNum,Year,Month,day);
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Epoch:=Abs(Epoch Mod 86400);
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Hour:=Epoch Div 3600;
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Epoch:=Epoch Mod 3600;
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Minute:=Epoch Div 60;
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Second:=Epoch Mod 60;
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End;
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function NowUTC: TDateTime;
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var
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tz:timeval;
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SystemTime: TSystemTime;
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begin
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fpgettimeofday(@tz,nil);
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EpochToLocal(tz.tv_sec,SystemTime.year,SystemTime.month,SystemTime.day,SystemTime.hour,SystemTime.Minute,SystemTime.Second);
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SystemTime.MilliSecond:=tz.tv_usec div 1000;
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result := systemTimeToDateTime(SystemTime);
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end;
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{$IF FPC_FULLVERSION<30000}
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{$IF defined(Linux) and not defined(GetTickCountTimeOfDay)}
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function GetTickCount64: QWord;
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var
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tp: timespec;
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begin
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clock_gettime(CLOCK_MONOTONIC, @tp); // exists since Linux Kernel 2.6
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Result := (Int64(tp.tv_sec) * 1000) + (tp.tv_nsec div 1000000);
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end;
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{$ELSE}
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function GetTickCount64: QWord;
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var
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tp: TTimeVal;
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begin
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fpgettimeofday(@tp, nil);
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Result := (Int64(tp.tv_sec) * 1000) + (tp.tv_usec div 1000);
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end;
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{$ENDIF}
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{$ENDIF FPC_FULLVERSION}
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{$ELSE UNIX}
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// Not Windows and not UNIX, so just write the most trivial code until we have something better:
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function NowUTC: TDateTime;
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begin
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Result := Now;
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end;
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{$IF FPC_FULLVERSION<30000}
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function GetTickCount64: QWord;
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begin
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Result := Trunc(Now * 24 * 60 * 60 * 1000);
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end;
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{$ENDIF FPC_FULLVERSION}
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{$ENDIF UNIX}
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{$ENDIF WINDOWS}
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end.
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