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{$ifdef fpc}{$mode objfpc}{$h+}{$endif}
{$apptype console}
uses Variants, SysUtils;
type
TTest = class(TCustomVariantType)
procedure Clear(var V: TVarData); override;
procedure Copy(var Dest: TVarData; const Source: TVarData; const Indirect: Boolean); override;
procedure DispInvoke(Dest: PVarData; const Source: TVarData; CallDesc: PCallDesc; Params: Pointer); override;
end;
procedure TTest.Clear(var V: TVarData);
begin
end;
procedure TTest.Copy(var Dest: TVarData; const Source: TVarData; const Indirect: Boolean);
begin
end;
procedure TTest.DispInvoke(Dest: PVarData; const Source: TVarData; CallDesc: PCallDesc; Params: Pointer);
var
tmp: Word;
begin
if (CallDesc^.ArgCount =2) and Assigned(Dest) then
begin
//writeln(HexStr(PPointer(Params)^), ' ', HexStr(PPointer(Params)[1]));
WordRec(tmp).Lo := CallDesc^.ArgTypes[0];
WordRec(tmp).Hi := CallDesc^.ArgTypes[1];
// !! FPC passes args right-to-left, Delphi does same left-to-right
// Moreover, IDispatch needs args right-to-left, and Variant Dispatch needs left-to-right. Nice, huh?
{$ifdef fpc}
tmp := Swap(tmp);
{$endif}
Variant(Dest^) := tmp;
end;
end;
type
TTestClass=class
u8: byte;
u16: word;
u32: longword;
{$ifdef fpc}
u64: qword;
{$endif}
s8: shortint;
s16: smallint;
s32: longint;
s64: int64;
cy: currency;
b: boolean;
bb: bytebool;
wb: wordbool;
lb: longbool;
sgl: single;
dbl: double;
ext: extended;
dt: TDateTime;
fsstr: shortstring;
fastr: ansistring;
fwstr: widestring;
{$ifdef fpc}
fustr: unicodestring;
{$endif}
fvar: Variant;
fintf: IInterface;
fdisp: IDispatch;
property u8prop: Byte read u8;
property u16prop: Word read u16;
property u32prop: LongWord read u32;
{$ifdef fpc}
property u64prop: QWord read u64;
{$endif}
property s8prop: ShortInt read s8;
property s16prop: SmallInt read s16;
property s32prop: LongInt read s32;
property s64prop: Int64 read s64;
property cyprop: currency read cy;
property bprop: boolean read b;
property bbprop: bytebool read bb;
property wbprop: wordbool read wb;
property lbprop: longbool read lb;
property sglprop: single read sgl;
property dblprop: double read dbl;
property extprop: extended read ext;
property dtprop: TDateTime read dt;
property varprop: Variant read fvar;
property intfprop: IInterface read fintf;
property dispprop: IDispatch read fdisp;
property sstr: shortstring read fsstr;
property astr: ansistring read fastr;
property wstr: widestring read fwstr;
{$ifdef fpc}
property ustr: unicodestring read fustr;
{$endif}
end;
var
cv: TCustomVariantType;
code: Integer;
cl: TTestClass;
v: Variant;
// using negative values of Expected to check that arg is passed by-value only
procedure test(const id: string; const act: Variant; expected: Integer);
var
tmp: word;
absexp: Integer;
begin
tmp := act;
absexp := abs(expected);
write(id, WordRec(tmp).Lo,', ', WordRec(tmp).Hi);
if (expected >= 0) and (WordRec(tmp).Lo <> (expected or $80)) then
begin
write(' BYREF failed');
Code := Code or 1;
end;
if WordRec(tmp).Hi <> absexp then
begin
write(' BYVAL failed');
Code := Code or 2;
end;
writeln;
end;
begin
Code := 0;
cv := TTest.Create;
cl := TTestClass.Create;
TVarData(v).vType := cv.VarType;
test('u8: ', v.foo(cl.u8, cl.u8prop), varbyte);
test('u16: ', v.foo(cl.u16, cl.u16prop), varword); // (Uncertain) D7: treated as Integer
test('u32: ', v.foo(cl.u32, cl.u32prop), varlongword); // (Uncertain) D7: treated as Integer ByRef
test('s8: ', v.foo(cl.s8, cl.s8prop), varshortint); // (Uncertain) D7: treated as Integer
test('s16: ', v.foo(cl.s16, cl.s16prop), varsmallint);
test('s32: ', v.foo(cl.s32, cl.s32prop), varinteger);
test('s64: ', v.foo(cl.s64, cl.s64prop), varint64);
{$ifdef fpc}
test('u64: ', v.foo(cl.u64, cl.u64prop), varword64);
{$endif}
test('wordbool:', v.foo(cl.wb, cl.wbprop), varBoolean);
test('curncy: ', v.foo(cl.cy, cl.cyprop), varCurrency);
test('single: ', v.foo(cl.sgl, cl.sglprop), varSingle);
test('double: ', v.foo(cl.dbl, cl.dblprop), varDouble);
test('extended:', v.foo(cl.ext, cl.extprop), -varDouble); // not a COM type, passed by value
test('date: ', v.foo(cl.dt, cl.dtprop), varDate);
test('ansistr: ', v.foo(cl.fastr, cl.astr), varStrArg);
test('widestr: ', v.foo(cl.fwstr, cl.wstr), varOleStr);
{$ifdef fpc}
test('unistr: ', v.foo(cl.fustr, cl.ustr), varUStrArg);
{$endif}
test('variant: ', v.foo(cl.fvar, cl.varprop), varVariant);
test('IUnknown:', v.foo(cl.fintf, cl.intfprop), varUnknown);
test('IDispatch:', v.foo(cl.fdisp, cl.dispprop), varDispatch);
// not an COM type, passed by value; Delphi uses varStrArg
test('shortstr:', v.foo(cl.fsstr, cl.sstr), -varOleStr);
// not an COM type, passed by value
test('longbool:', v.foo(cl.lb, cl.lbprop), -varBoolean);
// typecasted ordinals (only one arg is actually used)
test('u8+cast: ', v.foo(byte(55), byte(55)), -varByte);
test('u16+cast:', v.foo(word(55), word(55)), -varWord);
test('u32+cast:', v.foo(longword(55), longword(55)), -varLongWord);
{$ifdef fpc}
test('u64+cast:', v.foo(qword(55), qword(55)), -varQWord);
{$endif}
test('s8+cast:', v.foo(shortint(55), shortint(55)), -varShortInt);
test('s16+cast:', v.foo(smallint(55), smallint(55)), -varSmallInt);
test('s32+cast:', v.foo(longint(55), longint(55)), -varInteger);
test('s64+cast:', v.foo(int64(55), int64(55)), -varInt64);
cl.Free;
if Code <> 0 then
writeln('Errors: ', Code);
Halt(Code);
end.
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