Hi,
, is this correct ? Shouldn't it be FList^, since FList is a pointer to an array of pointers ?
Micha
Mailing lists / fpc-devel / 2006-10
TFPList.Pack
5 messages · 2 people · –
- Micha Nelissen 3
- Peter Vreman 2
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Micha Nelissen wroteHi, , is this correct ? Shouldn't it be FList^, since FList is a pointer to an array of pointers ?
Sorry, fpc 2.1.1, compiler/cclasses.pas. Same story for TFPHashList.Pack btw.
Micha
Show quoted text 8 lines
Micha Nelissen wrote:
> Hi,
>
> , is this correct ? Shouldn't it be FList^, since FList
> is a pointer to an array of pointers ?
Sorry, fpc 2.1.1, compiler/cclasses.pas. Same story for TFPHashList.Pack
btw.
It is correct. It is the address of the first pointer in the array of pointers.
Peter Vreman wrote 8 lines
> Micha Nelissen wrote:
>> Hi,
>>
>> , is this correct ? Shouldn't it be FList^, since FList
>> is a pointer to an array of pointers ?
It is correct. It is the address of the first pointer in the array of
pointers.
Conceptually, it is wrong. On the implementation level it may be correct.
FList = ^(array[0..Max] of Pointer);
FList[0] = (array[0..Max] of Pointer);
@FList[0] = ^(array[0..Max] of Pointer) = FList;
So address:
(@FList[0])[1] = (ptrint(FList) + 1 * sizeof(array[0..Max] of Pointer)));Micha
you wrote 17 lines
Peter Vreman wrote:
>>Micha Nelissen wrote:
>>>Hi,
>>>
>>>, is this correct ? Shouldn't it be FList^, since FList
>>>is a pointer to an array of pointers ?
>It is correct. It is the address of the first pointer in the array of
>pointers.
Conceptually, it is wrong. On the implementation level it may be correct.
FList = ^(array[0..Max] of Pointer);
FList[0] = (array[0..Max] of Pointer);
@FList[0] = ^(array[0..Max] of Pointer) = FList;
So address:
(@FList[0])[1] = (ptrint(FList) + 1 * sizeof(array[0..Max] of Pointer)));
It should be FList^[0]. Just like it is used the other methods of the TFPList class
Peter