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{ Copyright (c) Carl Eric Codere }
{ This program tests the assigned() routine }
{ Tested against Delphi 6 Personal Edition }
{$ifdef fpc}
{$mode objfpc}
{$endif}
type
tmyobject = object
procedure myroutine(x: byte);
end;
tmyclass = class
procedure myroutine(x: byte);
end;
tobjectmethod = procedure (x: byte) of object;
tclassmethod = procedure (x: byte) of object;
tproc = procedure (x: byte);
type
objpointer = packed record
_method : pointer;
_vmt : pointer;
end;
var
myobject : tmyobject;
myclass : tmyclass;
procedure fail;
begin
WriteLn('Failure!');
halt(1);
end;
procedure mydummyproc(x: byte);
begin
end;
function getpointer : pointer;
begin
getpointer := nil;
end;
function getprocpointer : tproc;
begin
getprocpointer:=@mydummyproc;
end;
{$ifdef fpc}
function getobjmethodpointer : tobjectmethod;
begin
getobjmethodpointer:=@myobject.myroutine;
end;
function getclamethodpointer : tclassmethod;
begin
getclamethodpointer:=@myclass.myroutine;
end;
{$endif}
procedure tmyclass.myroutine(x: byte);
begin
end;
procedure tmyobject.myroutine(x: byte);
begin
end;
{ possible chocies (fixes branch only) :
LOC_REGISTER
LOC_REFERENCE
second branch handles this in a generic way
}
var
objmethod : tobjectmethod;
clamethod : tclassmethod;
proc : tproc;
p : pointer;
x: array[1..8] of integer;
_result : boolean;
ptrrecord : objpointer;
Begin
myclass := tmyclass.create;
Write('Assigned(pointer) tests...');
_result := true;
p:=@x;
if not assigned(p) then
_result := false;
p:=nil;
if assigned(p) then
_result := false;
{$ifdef fpc}
if assigned(getpointer) then
_result := false;
{$endif}
if _result then
WriteLn('Success!')
else
fail;
{*******************************************************}
Write('Assigned(proc) tests...');
_result := true;
proc:=@mydummyproc;
if not assigned(proc) then
_result := false;
proc:=nil;
{$ifdef fpc}
if assigned(proc) then
_result := false;
if not assigned(getprocpointer) then
_result := false;
{$endif}
if _result then
WriteLn('Success!')
else
fail;
{*******************************************************}
Write('Assigned(object method) tests...');
_result := true;
{$ifdef fpc}
objmethod:=@myobject.myroutine;
if not assigned(objmethod) then
_result := false;
{$endif}
objmethod:=nil;
if assigned(objmethod) then
_result := false;
{ lets put the individual fields to nil
This is a hack which should never occur
}
objmethod:={$ifdef fpc}@{$endif}myobject.myroutine;
move(objmethod, ptrrecord, sizeof(ptrrecord));
ptrrecord._vmt := nil;
move(ptrrecord, objmethod, sizeof(ptrrecord));
if not assigned(objmethod) then
_result := false;
objmethod:={$ifdef fpc}@{$endif}myobject.myroutine;
move(objmethod, ptrrecord, sizeof(ptrrecord));
ptrrecord._method := nil;
move(ptrrecord, objmethod, sizeof(ptrrecord));
if assigned(objmethod) then
_result := false;
{$ifdef fpc}
if not assigned(getobjmethodpointer) then
_result := false;
{$endif}
if _result then
WriteLn('Success!')
else
fail;
{*******************************************************}
Write('Assigned(class method) tests...');
_result := true;
{$ifdef fpc}
clamethod:=@myclass.myroutine;
if not assigned(clamethod) then
_result := false;
{$endif}
clamethod:=nil;
if assigned(clamethod) then
_result := false;
{ lets put the individual fields to nil
This is a hack which should never occur
}
clamethod:={$ifdef fpc}@{$endif}myclass.myroutine;
move(clamethod, ptrrecord, sizeof(ptrrecord));
ptrrecord._vmt := nil;
move(ptrrecord, clamethod, sizeof(ptrrecord));
if not assigned(clamethod) then
_result := false;
clamethod:={$ifdef fpc}@{$endif}myclass.myroutine;
move(clamethod, ptrrecord, sizeof(ptrrecord));
ptrrecord._method := nil;
move(ptrrecord, clamethod, sizeof(ptrrecord));
if assigned(clamethod) then
_result := false;
{$ifdef fpc}
if not assigned(getclamethodpointer) then
_result := false;
{$endif}
if _result then
WriteLn('Success!')
else
fail;
end.
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