OptDate2Year Function |
Unit
QESBPCSDateTime
Declaration
Function OptDate2Year(const DT: TDateTime): Word;
Category
Date/Time Conversion RoutinesImplementation
function OptDate2Year (const DT: TDateTime): Word; var J: Integer; Day, Month, Year: Integer; begin J := pred ((Trunc (DT) + 693900) shl 2); Year := J div 146097; Day := (J - 146097 * Year) shr 2; J := (Day shl 2 + 3) div 1461; Day := (Day shl 2 + 7 - 1461 * J) shr 2; Month := (5 * Day - 3) div 153; Year := 100 * Year + J; if Month >= 10 then Inc (Year); Result := Year End; |
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