mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 18:51:53 +01:00
473 lines
8.4 KiB
PHP
473 lines
8.4 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 : variant);[Public,Alias:'FPC_VARIANT_INIT'];
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begin
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variantmanager.varinit(v);
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end;
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procedure variant_clear(var v : variant);[Public,Alias:'FPC_VARIANT_CLEAR'];
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begin
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variantmanager.varclear(v);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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// Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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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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Variant_Init(Dest);
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VariantManager.VarFromWStr(Dest,Source);
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end;
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{ Floats }
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operator :=(const source : single) dest : variant;
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begin
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Variant_Init(Dest);
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VariantManager.VarFromReal(Dest,Source);
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end;
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operator :=(const source : double) dest : variant;
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begin
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Variant_Init(Dest);
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VariantManager.VarFromReal(Dest,Source);
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end;
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operator :=(const source : extended) dest : variant;
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begin
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Variant_Init(Dest);
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VariantManager.VarFromReal(Dest,Source);
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end;
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Operator :=(const source : comp) dest : variant;
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begin
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Variant_Init(Dest);
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VariantManager.VarFromReal(Dest,Source);
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end;
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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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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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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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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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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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{ Misc. }
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{ FIXME !!!!!!!
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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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operator :=(const source : variant) dest : tdatetime;
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begin
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end;
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}
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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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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 1.4 2001-11-14 23:00:16 michael
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+ First working variant support
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Revision 1.3 2001/11/08 20:59:10 michael
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+ System unit implementation of variants
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Revision 1.2 2001/11/08 16:17:30 florian
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+ beginning of variant dispatching
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Revision 1.1 2001/08/19 21:02:01 florian
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* fixed and added a lot of stuff to get the Jedi DX8 headers
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compiled
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}
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