{ Copyright (c) 2022 by Jonas Maebe Target OS version comparisons This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. **************************************************************************** } unit versioncmp; {$i fpcdefs.inc} interface type tversion = object private fstr: string; fnum: cardinal; public { initialise with string and numerical representation of the version } constructor init(const str: string; major: byte; minor: word; patch: byte); constructor invalidate; function relationto(const other: tversion): shortint; function relationto(major: byte; minor: word; patch: byte): shortint; function isvalid: boolean; property str: string read fstr; private function tonum(major: byte; minor: word; patch: byte): cardinal; inline; end; implementation function tversion.tonum(major: byte; minor: word; patch: byte): cardinal; begin result:=(major shl 24) or (minor shl 8) or patch; end; constructor tversion.init(const str: string; major: byte; minor: word; patch: byte); begin fstr:=str; fnum:=tonum(major,minor,patch); end; constructor tversion.invalidate; begin fstr:=''; fnum:=0; end; function tversion.relationto(const other: tversion): shortint; begin if fnum>other.fnum then result:=1 else if fnumothernum then result:=1 else if fnum''; end; end.