mirror of
https://gitlab.com/freepascal.org/fpc/source.git
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594 lines
17 KiB
PHP
594 lines
17 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) 2000,2001 by the Free Pascal development team
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Interface and OS-dependent part of variant support
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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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{$ifdef HASVARIANT}
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Resourcestring
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SNoWidestrings = 'No widestrings supported';
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SNoInterfaces = 'No interfaces supported';
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Procedure NoWidestrings;
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begin
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Raise Exception.Create(SNoWideStrings);
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end;
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Procedure NoInterfaces;
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begin
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Raise Exception.Create(SNoInterfaces);
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end;
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Constructor EVariantError.CreateCode (Code : longint);
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begin
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ErrCode:=Code;
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end;
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Procedure VariantTypeMismatch;
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begin
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Raise EVariantError.CreateCode(VAR_TYPEMISMATCH);
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end;
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Function ExceptionToVariantError (E : Exception): HResult;
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begin
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If E is EoutOfMemory then
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Result:=VAR_OUTOFMEMORY
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else
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Result:=VAR_EXCEPTION;
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end;
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{ ---------------------------------------------------------------------
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OS-independent functions not present in Windows
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---------------------------------------------------------------------}
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Function VariantToSmallInt(Const VargSrc : TVarData) : SmallInt;
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begin
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=Round(VSingle);
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VarDouble : Result:=Round(VDouble);
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VarCurrency: Result:=Round(VCurrency);
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VarDate : Result:=Round(VDate);
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VarOleStr : Result:=StrToInt(WideCharToString(vOleStr));
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VarBoolean : Result:=SmallInt(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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end;
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Function VariantToShortInt(Const VargSrc : TVarData) : ShortInt;
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begin
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=Round(VSingle);
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VarDouble : Result:=Round(VDouble);
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VarCurrency: Result:=Round(VCurrency);
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VarDate : Result:=Round(VDate);
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VarOleStr : Result:=StrToInt(WideCharToString(vOleStr));
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VarBoolean : Result:=SmallInt(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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end;
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Function VariantToLongint(Const VargSrc : TVarData) : Longint;
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begin
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=Round(VSingle);
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VarDouble : Result:=Round(VDouble);
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VarCurrency: Result:=Round(VCurrency);
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VarDate : Result:=Round(VDate);
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VarOleStr : Result:=StrToInt(WideCharToString(vOleStr));
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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end;
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Function VariantToCardinal(Const VargSrc : TVarData) : Cardinal;
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begin
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=Round(VSingle);
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VarDouble : Result:=Round(VDouble);
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VarCurrency: Result:=Round(VCurrency);
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VarDate : Result:=Round(VDate);
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VarOleStr : Result:=StrToInt(WideCharToString(vOleStr));
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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end;
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Function VariantToSingle(Const VargSrc : TVarData) : Single;
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begin
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=VSingle;
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VarDouble : Result:=VDouble;
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VarCurrency: Result:=VCurrency;
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VarDate : Result:=VDate;
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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end;
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Function VariantToDouble(Const VargSrc : TVarData) : Double;
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begin
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=VSingle;
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VarDouble : Result:=VDouble;
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VarCurrency: Result:=VCurrency;
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VarDate : Result:=VDate;
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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end;
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Function VariantToCurrency(Const VargSrc : TVarData) : Currency;
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begin
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Try
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=FloatToCurr(VSingle);
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VarDouble : Result:=FloatToCurr(VDouble);
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VarCurrency: Result:=VCurrency;
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VarDate : Result:=FloatToCurr(VDate);
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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except
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On EConvertError do
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VariantTypeMismatch;
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else
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Raise;
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end;
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end;
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Function VariantToDate(Const VargSrc : TVarData) : TDateTime;
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begin
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Try
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=FloatToDateTime(VSmallInt);
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VarShortInt: Result:=FloatToDateTime(VShortInt);
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VarInteger : Result:=FloatToDateTime(VInteger);
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VarSingle : Result:=FloatToDateTime(VSingle);
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VarDouble : Result:=FloatToDateTime(VDouble);
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VarCurrency: Result:=FloatToDateTime(VCurrency);
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VarDate : Result:=VDate;
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=FloatToDateTime(Longint(VBoolean));
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VarByte : Result:=FloatToDateTime(VByte);
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VarWord : Result:=FloatToDateTime(VWord);
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VarLongWord : Result:=FloatToDateTime(VLongWord);
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VarInt64 : Result:=FloatToDateTime(VInt64);
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VarQWord : Result:=FloatToDateTime(VQword);
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else
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VariantTypeMismatch;
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end;
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except
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On EConvertError do
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VariantTypeMismatch;
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else
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Raise;
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end;
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end;
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Function VariantToBoolean(Const VargSrc : TVarData) : Boolean;
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begin
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt<>0;
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VarShortInt: Result:=VShortInt<>0;
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VarInteger : Result:=VInteger<>0;
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VarSingle : Result:=VSingle<>0;
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VarDouble : Result:=VDouble<>0;
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VarCurrency: Result:=VCurrency<>0;
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VarDate : Result:=VDate<>0;
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=VBoolean;
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VarByte : Result:=VByte<>0;
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VarWord : Result:=VWord<>0;
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VarLongWord : Result:=VLongWord<>0;
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VarInt64 : Result:=Vint64<>0;
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VarQword : Result:=VQWord<>0;
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else
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VariantTypeMismatch;
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end;
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end;
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Function VariantToByte(Const VargSrc : TVarData) : Byte;
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begin
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Try
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=Round(VSingle);
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VarDouble : Result:=Round(VDouble);
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VarCurrency: Result:=Round(VCurrency);
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VarDate : Result:=Round(VDate);
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=Vint64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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except
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On EConvertError do
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VariantTypeMismatch;
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else
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Raise;
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end;
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end;
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Function VariantToInt64(Const VargSrc : TVarData) : Int64;
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begin
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Try
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallInt;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=Trunc(VSingle);
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VarDouble : Result:=Trunc(VDouble);
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{$ifdef HASCURRENCY}
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VarCurrency: Result:=Trunc(VCurrency);
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{$else}
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VarCurrency: Result:=VCurrency;
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{$endif}
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VarDate : Result:=Trunc(VDate);
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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except
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On EConvertError do
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VariantTypeMismatch;
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else
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Raise;
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end;
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end;
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Function VariantToQWord(Const VargSrc : TVarData) : QWord;
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begin
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Try
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt: Result:=VSmallint;
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VarShortInt: Result:=VShortInt;
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VarInteger : Result:=VInteger;
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VarSingle : Result:=Trunc(VSingle);
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VarDouble : Result:=Trunc(VDouble);
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{$ifdef HASCURRENCY}
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VarCurrency: Result:=Trunc(VCurrency);
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{$else}
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VarCurrency: Result:=VCurrency;
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{$endif}
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VarDate : Result:=Trunc(VDate);
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VarOleStr : NoWideStrings;
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VarBoolean : Result:=Longint(VBoolean);
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VarByte : Result:=VByte;
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VarWord : Result:=VWord;
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VarLongWord : Result:=VLongWord;
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VarInt64 : Result:=VInt64;
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VarQword : Result:=VQWord;
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else
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VariantTypeMismatch;
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end;
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except
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On EConvertError do
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VariantTypeMismatch;
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else
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Raise;
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end;
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end;
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Function VariantToWideString(Const VargSrc : TVarData) : WideString;
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Const
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BS : Array[Boolean] of WideString = ('False','True');
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begin
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Try
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt : Result:=IntTostr(VSmallint);
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VarShortInt : Result:=IntToStr(VShortInt);
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VarInteger : Result:=IntToStr(VInteger);
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VarSingle : Result:=FloatToStr(VSingle);
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VarDouble : Result:=FloatToStr(VDouble);
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VarCurrency : Result:=FloatToStr(VCurrency);
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VarDate : Result:=DateTimeToStr(VDate);
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VarOleStr : Result:=WideString(Pointer(VOleStr));
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VarBoolean : Result:=BS[VBoolean];
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VarByte : Result:=IntToStr(VByte);
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VarWord : Result:=IntToStr(VWord);
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VarLongWord : Result:=IntToStr(VLongWord);
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VarInt64 : Result:=IntToStr(VInt64);
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VarQword : Result:=IntToStr(VQWord);
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else
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VariantTypeMismatch;
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end;
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except
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On EConvertError do
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VariantTypeMismatch;
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else
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Raise;
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end;
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end;
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Function VariantToAnsiString(Const VargSrc : TVarData) : AnsiString;
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Const
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BS : Array[Boolean] of AnsiString = ('False','True');
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begin
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Try
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With VargSrc do
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Case (VType and VarTypeMask) of
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VarSmallInt : Result:=IntTostr(VSmallint);
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VarShortInt : Result:=IntToStr(VShortInt);
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VarInteger : Result:=IntToStr(VInteger);
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VarSingle : Result:=FloatToStr(VSingle);
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VarDouble : Result:=FloatToStr(VDouble);
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VarCurrency : Result:=FloatToStr(VCurrency);
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VarDate : Result:=DateTimeToStr(VDate);
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VarOleStr : Result:=WideCharToString(VOleStr);
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VarBoolean : Result:=BS[VBoolean];
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VarByte : Result:=IntToStr(VByte);
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VarWord : Result:=IntToStr(VWord);
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VarLongWord : Result:=IntToStr(VLongWord);
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VarInt64 : Result:=IntToStr(VInt64);
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VarQword : Result:=IntToStr(VQWord);
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else
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VariantTypeMismatch;
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end;
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except
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On EConvertError do
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VariantTypeMismatch;
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else
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Raise;
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end;
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end;
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Function VariantToShortString(Const VargSrc : TVarData) : ShortString;
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Var
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S : AnsiString;
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begin
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S:=VariantToAnsiString(VArgSrc);
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Result:=S;
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end;
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{ ---------------------------------------------------------------------
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Some debug routines
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---------------------------------------------------------------------}
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Procedure DumpVariant(Const VArgSrc : TVarData);
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begin
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DumpVariant(Output,VArgSrc);
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end;
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(*
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tvardata = packed record
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vtype : tvartype;
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case integer of
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0:(res1 : word;
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case integer of
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0:
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(res2,res3 : word;
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case word of
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varsmallint : (vsmallint : smallint);
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varinteger : (vinteger : longint);
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varsingle : (vsingle : single);
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vardouble : (vdouble : double);
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varcurrency : (vcurrency : currency);
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vardate : (vdate : tdatetime);
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varolestr : (volestr : pwidechar);
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vardispatch : (vdispatch : pointer);
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varerror : (verror : dword);
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varboolean : (vboolean : wordbool);
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varunknown : (vunknown : pointer);
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// vardecimal : ( : );
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varshortint : (vshortint : shortint);
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varbyte : (vbyte : byte);
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varword : (vword : word);
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varlongword : (vlongword : dword);
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varint64 : (vint64 : int64);
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varqword : (vqword : qword);
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varword64 : (vword64 : qword);
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varstring : (vstring : pointer);
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varany : (vany : pointer);
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vararray : (varray : pvararray);
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varbyref : (vpointer : pointer);
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);
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1:
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(vlongs : array[0..2] of longint);
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);
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1:(vwords : array[0..6] of word);
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2:(vbytes : array[0..13] of byte);
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end;
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*)
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Const
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VarTypeStrings : Array [varEmpty..varqword] of string = (
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'empty', 'null', 'smallint', 'integer', 'single', 'double',
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'currency', 'date', 'olestr', 'dispatch', 'error', 'boolean',
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'variant', 'unknown', 'unknown','decimal', 'shortint', 'byte', 'word',
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'longword', 'int64', 'qword');
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Procedure DumpVariant(Var F : Text; Const VArgSrc : TVarData);
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Var
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W : WideString;
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begin
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If VArgSrc.vType in [varEmpty..varqword] then
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Writeln(F,'Variant has type : ',VarTypeStrings[VArgSrc.vType])
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else if (VArgSrc.vType=VarArray) Then
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begin
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Write(F,'Variant is array.');
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exit;
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end
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else if (VargSrc.vType=VarByRef) then
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begin
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Writeln(F,'Variant is by reference.');
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exit;
|
|
end
|
|
else
|
|
begin
|
|
Writeln(F,'Variant has unknown type: ', VargSrc.vType);
|
|
Exit;
|
|
end;
|
|
If VArgSrc.vType<>varEmpty then
|
|
With VArgSrc do
|
|
begin
|
|
Write(F,'Value is: ') ;
|
|
Case vtype of
|
|
varnull : Write(F,'Null');
|
|
varsmallint : Write(F,vsmallint);
|
|
varinteger : Write(F,vinteger);
|
|
varsingle : Write(F,vsingle);
|
|
vardouble : Write(F,vdouble);
|
|
varcurrency : Write(F,vcurrency) ;
|
|
vardate : Write(F,vdate) ;
|
|
varolestr : begin
|
|
W:=vOleStr;
|
|
Write(F,W) ;
|
|
end;
|
|
vardispatch : Write(F,'Not suppordted') ;
|
|
varerror : Write(F,'Error') ;
|
|
varboolean : Write(F,vboolean) ;
|
|
varvariant : Write(F,'Unsupported') ;
|
|
varunknown : Write(F,'Unsupported') ;
|
|
vardecimal : Write(F,'Unsupported') ;
|
|
varshortint : Write(F,vshortint) ;
|
|
varbyte : Write(F,vbyte) ;
|
|
varword : Write(F,vword) ;
|
|
varlongword : Write(F,vlongword) ;
|
|
varint64 : Write(F,vint64) ;
|
|
varqword : Write(F,vqword) ;
|
|
end;
|
|
Writeln(f);
|
|
end;
|
|
end;
|
|
|
|
{$endif HASVARIANT}
|
|
|
|
{
|
|
$Log$
|
|
Revision 1.11 2005-02-14 17:13:31 peter
|
|
* truncate log
|
|
|
|
}
|