[fpc-pascal] Is there a recent change to TProcess?

[Tomas Hajny]

On 2024-12-20 14:22, Michael Van Canneyt via fpc-pascal wrote:
> On Fri, 20 Dec 2024, Karoly Balogh via fpc-pascal wrote:
>> Hi,
>> On Fri, 20 Dec 2024, Michael Van Canneyt via fpc-pascal wrote:
>> 
>>>> If I compile it with:
>>>> Free Pascal Compiler version 3.3.1-16969-g798f2ba632-dirty 
>>>> [2024/11/28] for
>>>> i386
>>>> I get almost what I expected, but my #$EE is now been changed to 
>>>> #$3F   (and
>>>> all similar codes in the range of #$D0 - #$EF have been changed to 
>>>> #$3F as
>>>> well)
>>>>    Sent: #$EE#$59#$20#$4D#$69#$6E#$20
>>>> Received: #$3F#$59#$20#$4D#$69#$6E#$20
>>>> 
>>>> Does anyone know why this is?  I have tried it several times, if I 
>>>> compile
>>>> it with the trunk from 2024/03/18 it's fine, if I use the current 
>>>> trunk my
>>>> other program is receiving the wrong data. noted that I never 
>>>> re-compiled
>>>> CMD_Message.exe so it must be that my TProcess is now sending 
>>>> modified
>>>> parameters to my program.
>>>> 
>>>> Is there any way to get TProcess in the current trunk to work the 
>>>> way it
>>>> used to?
>>> 
>>> Note that sending a non-ascii string on the command-line is a bad 
>>> idea.
>>> It's susceptible to codepage issues, and will most likely behave 
>>> differently
>>> depending on whether the ANSI or WideString version of the underlying
>>> windows API is used.
>> 
>> Which is what probably happens here. "3F" is the ASCII code for the 
>> "?"
>> character, which is used as a joker character for codepage 
>> conversions,
>> when the mapping cannot be determined...
>> 
>> I was also wondering if some basic behavior changes regarding string 
>> types
>> have been introducted into the RTL, that somehow leaks into TProcess, 
>> by
>> introducing a conversion somehow along the way.
> 
> I am not aware of any such changes, but given your remark about the 
> meaning
> of 3F, the latter seems a likely explanation.

Could it be due to a change of compilation mode (DELPHIUNICODE etc.) by 
the user?

Tomas