mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-16 10:59:33 +02:00
616 lines
12 KiB
PHP
616 lines
12 KiB
PHP
{
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$Id$
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This file is part of the Free Pascal run time library.
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Copyright (c) 2001 by the Free Pascal development team
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This include file contains the implementation for variants
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support in FPC as far as it is part of the system unit
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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var
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variantmanager : tvariantmanager;
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procedure invalidvariantop;
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begin
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HandleErrorFrame(221,get_frame);
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end;
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procedure vardisperror;
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begin
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HandleErrorFrame(222,get_frame);
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end;
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{ ---------------------------------------------------------------------
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Compiler helper routines.
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---------------------------------------------------------------------}
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procedure varclear(var v : tvardata);
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begin
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if not(v.vtype in [varempty,varerror,varnull]) then
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invalidvariantop;
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end;
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procedure variant_init(var v : tvardata);[Public,Alias:'FPC_VARIANT_INIT'];
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begin
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{ calling the variant manager here is a problem because the static/global variants
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are initialized while the variant manager isn't assigned }
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fillchar(v,sizeof(variant),0);
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end;
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procedure variant_clear(var v : tvardata);[Public,Alias:'FPC_VARIANT_CLEAR'];
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begin
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if assigned(VarClearProc) then
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VarClearProc(v)
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end;
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procedure variant_addref(var v : tvardata);[Public,Alias:'FPC_VARIANT_ADDREF'];
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begin
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if assigned(VarAddRefProc) then
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VarAddRefProc(v);
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end;
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Procedure fpc_write_text_variant(Len : Longint;var f : Text;const v : variant); iocheck; [Public,Alias:'FPC_WRITE_TEXT_VARIANT']; compilerproc;
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Begin
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If (InOutRes<>0) then
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exit;
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case TextRec(f).mode of
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{ fmAppend gets changed to fmOutPut in do_open (JM) }
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fmOutput:
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if len=-1 then
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variantmanager.write0variant(f,v)
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else
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variantmanager.writevariant(f,v,len);
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fmInput:
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InOutRes:=105
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else InOutRes:=103;
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end;
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End;
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function fpc_variant_to_dynarray(const v : variant;typeinfo : pointer) : pointer;compilerproc;
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begin
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variantmanager.vartodynarray(result,v,typeinfo);
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end;
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function fpc_dynarray_to_variant(dynarr : pointer;typeinfo : pointer) : variant;compilerproc;
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begin
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variantmanager.varfromdynarray(result,dynarr,typeinfo);
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end;
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function fpc_variant_to_interface(const v : variant) : iinterface;compilerproc;
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begin
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variantmanager.vartointf(result,v);
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end;
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function fpc_interface_to_variant(const i : iinterface) : variant;compilerproc;
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begin
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variantmanager.varfromintf(result,i);
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end;
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{ ---------------------------------------------------------------------
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Overloaded operators.
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---------------------------------------------------------------------}
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{ Integer }
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operator :=(const source : byte) dest : variant;
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begin
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Variantmanager.varfromInt(Dest,Source,1);
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end;
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operator :=(const source : shortint) dest : variant;
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begin
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Variantmanager.varfromInt(Dest,Source,-1);
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end;
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operator :=(const source : word) dest : variant;
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begin
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Variantmanager.varfromInt(Dest,Source,2);
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end;
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operator :=(const source : smallint) dest : variant;
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begin
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Variantmanager.varfromInt(Dest,Source,-2);
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end;
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operator :=(const source : dword) dest : variant;
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begin
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Variantmanager.varfromInt(Dest,Source,4);
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end;
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operator :=(const source : longint) dest : variant;
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begin
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Variantmanager.varfromInt(Dest,Source,-4);
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end;
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operator :=(const source : qword) dest : variant;
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begin
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Variantmanager.varfromWord64(Dest,Source);
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end;
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operator :=(const source : int64) dest : variant;
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begin
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Variantmanager.varfromInt64(Dest,Source);
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end;
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{ Boolean }
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operator :=(const source : boolean) dest : variant;
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begin
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Variantmanager.varfromBool(Dest,Source);
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end;
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operator :=(const source : wordbool) dest : variant;
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begin
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Variantmanager.varfromBool(Dest,Boolean(Source));
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end;
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operator :=(const source : longbool) dest : variant;
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begin
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Variantmanager.varfromBool(Dest,Boolean(Source));
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end;
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{ Chars }
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operator :=(const source : char) dest : variant;
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begin
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VariantManager.VarFromPStr(Dest,Source);
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end;
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operator :=(const source : widechar) dest : variant;
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begin
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VariantManager.VarFromWStr(Dest,Source);
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end;
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{ Strings }
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operator :=(const source : shortstring) dest : variant;
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begin
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VariantManager.VarFromPStr(Dest,Source);
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end;
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operator :=(const source : ansistring) dest : variant;
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begin
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VariantManager.VarFromLStr(Dest,Source);
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end;
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operator :=(const source : widestring) dest : variant;
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begin
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VariantManager.VarFromWStr(Dest,Source);
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end;
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{ Floats }
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{$ifdef SUPPORT_SINGLE}
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operator :=(const source : single) dest : variant;
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begin
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VariantManager.VarFromReal(Dest,Source);
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end;
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{$endif SUPPORT_SINGLE}
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{$ifdef SUPPORT_DOUBLE}
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operator :=(const source : double) dest : variant;
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begin
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VariantManager.VarFromReal(Dest,Source);
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end;
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{$endif SUPPORT_DOUBLE}
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{$ifdef SUPPORT_EXTENDED}
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operator :=(const source : extended) dest : variant;
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begin
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VariantManager.VarFromReal(Dest,Source);
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end;
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{$endif SUPPORT_EXTENDED}
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{$ifdef SUPPORT_COMP}
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Operator :=(const source : comp) dest : variant;
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begin
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VariantManager.VarFromReal(Dest,Source);
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end;
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{$endif SUPPORT_COMP}
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{ Misc. }
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{ Fixme!!!
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operator :=(const source : currency) dest : variant;
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begin
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end;
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operator :=(const source : tdatetime) dest : variant;
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begin
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end;
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}
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{**********************************************************************
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from Variant assignments
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**********************************************************************}
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{ Integer }
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operator :=(const source : variant) dest : byte;
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begin
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dest:=variantmanager.vartoint(source);
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end;
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operator :=(const source : variant) dest : shortint;
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begin
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dest:=variantmanager.vartoint(source);
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end;
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operator :=(const source : variant) dest : word;
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begin
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dest:=variantmanager.vartoint(source);
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end;
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operator :=(const source : variant) dest : smallint;
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begin
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dest:=variantmanager.vartoint(source);
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end;
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operator :=(const source : variant) dest : dword;
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begin
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dest:=variantmanager.vartoint(source);
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end;
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operator :=(const source : variant) dest : longint;
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begin
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dest:=variantmanager.vartoint(source);
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end;
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operator :=(const source : variant) dest : qword;
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begin
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dest:=variantmanager.vartoword64(source);
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end;
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operator :=(const source : variant) dest : int64;
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begin
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dest:=variantmanager.vartoint64(source);
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end;
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{ Boolean }
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operator :=(const source : variant) dest : boolean;
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begin
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dest:=variantmanager.vartobool(source);
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end;
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operator :=(const source : variant) dest : wordbool;
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begin
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dest:=variantmanager.vartobool(source);
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end;
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operator :=(const source : variant) dest : longbool;
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begin
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dest:=variantmanager.vartobool(source);
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end;
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{ Chars }
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operator :=(const source : variant) dest : char;
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Var
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S : String;
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begin
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VariantManager.VarToPStr(S,Source);
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If Length(S)>0 then
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Dest:=S[1];
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end;
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operator :=(const source : variant) dest : widechar;
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Var
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WS : WideString;
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begin
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VariantManager.VarToWStr(WS,Source);
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If Length(WS)>0 then
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Dest:=WS[1];
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end;
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{ Strings }
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operator :=(const source : variant) dest : shortstring;
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begin
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VariantManager.VarToPStr(Dest,Source);
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end;
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operator :=(const source : variant) dest : ansistring;
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begin
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VariantManager.vartolstr(dest,source);
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end;
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operator :=(const source : variant) dest : widestring;
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begin
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variantmanager.vartowstr(dest,source);
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end;
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{ Floats }
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{$ifdef SUPPORT_SINGLE}
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operator :=(const source : variant) dest : single;
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begin
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dest:=variantmanager.vartoreal(source);
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end;
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{$endif SUPPORT_SINGLE}
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{$ifdef SUPPORT_DOUBLE}
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operator :=(const source : variant) dest : double;
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begin
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dest:=variantmanager.vartoreal(source);
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end;
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{$endif SUPPORT_DOUBLE}
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{$ifdef SUPPORT_EXTENDED}
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operator :=(const source : variant) dest : extended;
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begin
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dest:=variantmanager.vartoreal(source);
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end;
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{$endif SUPPORT_EXTENDED}
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{$ifdef SUPPORT_COMP}
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operator :=(const source : variant) dest : comp;
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begin
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dest:=comp(variantmanager.vartoreal(source));
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end;
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{$endif SUPPORT_COMP}
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{ Misc. }
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operator :=(const source : variant) dest : currency;
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begin
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dest:=variantmanager.vartocurr(source);
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end;
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(* FIXME !!!
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operator :=(const source : variant) dest : tdatetime;
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begin
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dest:=variantmanager.currtovar(source);
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end;
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*)
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{**********************************************************************
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Operators
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**********************************************************************}
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operator or(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opor);
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end;
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operator and(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opand);
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end;
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operator xor(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opxor);
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end;
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operator not(const op : variant) dest : variant;
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begin
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dest:=op;
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variantmanager.varnot(dest);
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end;
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operator shl(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opshiftleft);
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end;
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operator shr(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opshiftright);
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end;
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operator +(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opadd);
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end;
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operator -(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opsubtract);
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end;
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operator *(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opmultiply);
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end;
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operator /(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opdivide);
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end;
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operator div(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opintdivide);
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end;
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operator mod(const op1,op2 : variant) dest : variant;
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begin
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dest:=op1;
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variantmanager.varop(dest,op2,opmodulus);
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end;
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operator -(const op : variant) dest : variant;
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begin
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dest:=op;
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variantmanager.varneg(dest);
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end;
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operator =(const op1,op2 : variant) dest : boolean;
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begin
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dest:=variantmanager.cmpop(op1,op2,opcmpeq);
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end;
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operator <(const op1,op2 : variant) dest : boolean;
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begin
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dest:=variantmanager.cmpop(op1,op2,opcmplt);
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end;
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operator >(const op1,op2 : variant) dest : boolean;
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begin
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dest:=variantmanager.cmpop(op1,op2,opcmpgt);
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end;
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operator >=(const op1,op2 : variant) dest : boolean;
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begin
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dest:=variantmanager.cmpop(op1,op2,opcmpge);
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end;
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operator <=(const op1,op2 : variant) dest : boolean;
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begin
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dest:=variantmanager.cmpop(op1,op2,opcmplt);
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end;
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{**********************************************************************
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Variant manager functions
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**********************************************************************}
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procedure GetVariantManager(var VarMgr: TVariantManager);
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begin
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VarMgr:=VariantManager;
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end;
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procedure SetVariantManager(const VarMgr: TVariantManager);
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begin
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VariantManager:=VarMgr;
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end;
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function IsVariantManagerSet: Boolean;
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var
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i : longint;
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begin
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I:=0;
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Result:=True;
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While Result and (I<(sizeof(tvariantmanager) div sizeof(pointer))-1) do
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begin
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Result:=Pointer(ppointer(@variantmanager+i*sizeof(pointer))^)<>Pointer(@invalidvariantop);
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Inc(I);
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end;
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end;
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procedure initvariantmanager;
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var
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i : longint;
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begin
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VarDispProc:=@vardisperror;
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DispCallByIDProc:=@vardisperror;
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tvardata(Unassigned).VType:=varEmpty;
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tvardata(Null).VType:=varNull;
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for i:=0 to (sizeof(tvariantmanager) div sizeof(pointer))-1 do
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ppointer(@variantmanager+i*sizeof(pointer))^:=@invalidvariantop;
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pointer(variantmanager.varclear):=@varclear
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end;
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{
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$Log$
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Revision 1.25 2005-02-24 22:36:36 florian
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+ some variant stuff fixed and added
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Revision 1.24 2005/02/14 17:13:29 peter
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* truncate log
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Revision 1.23 2005/02/01 20:22:24 florian
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+ interface <-> variant conversion from Danny Milosavljevic
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Revision 1.22 2005/01/15 18:47:26 florian
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* several variant init./final. stuff fixed
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Revision 1.21 2005/01/08 20:43:44 florian
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+ init/cleaning code for variants added
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Revision 1.20 2005/01/07 21:15:46 florian
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+ basic rtl support for variant <-> interface implemented
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}
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