I think I found a Compiler BUG.

I have a DLL with a function called FileExt:

---------------------------------------------------------------

function FileExt(cFile, lUpper)
   local nPos := rat('.',cFile)
   local cExt := iif(nPos==0,"",substr(cFile,nPos+1))
   if "\" $ cExt ; cExt := "" ; endif  period is part of relative path
   if lUpper == .t.
     cExt := upper(cExt)
     endif
return trim(cExt)

---------------------------------------------------------------

If I call it without recompile the whole project in this way:

if FileExt("myfile.pdf", .t.) != 'PDF'
    csBox("must be a pdf!")
    loop
endif

I got this error:

oError:cargo        : NIL
oError:description  : Parameter has a wrong data type

if I recompile the whole it works ok.


So I duplicated the function and renamed it to FileExtension
and now with the call

if FileExtension("myfile.pdf", .t.) != 'PDF'
    csBox("must be a pdf!")
    loop
endif

All works fine.

---------------------------------------------------------------

Seems to me that there are a not documented function FileExt
in the XPP library which goes to conflict.

Some one can confirm.

Claudio

Claudio,

>Seems to me that there are a not documented function FileExt
>in the XPP library which goes to conflict.

You are right, there is a function called FileExt in the XppRT1 (Runtime 1) 
DLL since version 1.90.317, released 03/24/2005 ("Cape Horn" Beta 3). But if 
you try ot call that function, you will get an error "Function is not 
declared". This is also true for several other functions, like: FDrive(), 
FPath(), FPathAdd(), FPathMerge(), etc., while some others can be called, 
like: FTimeCmp(), GetCurDir(), Hash2Bin(), LL2Bin(), SendAppEvent() and many 
more. Some of those might be internal or experimental functions (procedures 
or classes), which won't be there in the future or they might be added to 
the documentation at a later time.

It would be nice if Alaska would document those (and several other of the 
undocumented features/functions), though I wouldn't call it a compiler bug, 
but a documentation issue.

Hope that helps,

Andreas

Andreas Gehrs-Pahl
Absolute Software, LLC

phone: (989) 723-9927
email: Andreas@AbsoluteSoftwareLLC.com
web:   http://www.AbsoluteSoftwareLLC.com
[L]:   https://www.LinkedIn.com/in/AndreasGehrsPahl
[F]:   https://www.FaceBook.com/AbsoluteSoftwareLLC

Many thanks Andreas!

So is safe to me to rename the function to avoid this issue.

I have another issue with debugger. I have to recompile my
dll each time I try to debug functions in DLL, if I didn't
debugger pointer go to a wrong position. I will try to renane
to see if belongs to the same problem.

Regards

Claudio

In 01/11/20 01:46, Andreas Gehrs-Pahl wrote:
> Claudio,
> 
>> Seems to me that there are a not documented function FileExt
>> in the XPP library which goes to conflict.
> 
> You are right, there is a function called FileExt in the XppRT1 (Runtime 1)
> DLL since version 1.90.317, released 03/24/2005 ("Cape Horn" Beta 3). But if
> you try ot call that function, you will get an error "Function is not
> declared". This is also true for several other functions, like: FDrive(),
> FPath(), FPathAdd(), FPathMerge(), etc., while some others can be called,
> like: FTimeCmp(), GetCurDir(), Hash2Bin(), LL2Bin(), SendAppEvent() and many
> more. Some of those might be internal or experimental functions (procedures
> or classes), which won't be there in the future or they might be added to
> the documentation at a later time.
> 
> It would be nice if Alaska would document those (and several other of the
> undocumented features/functions), though I wouldn't call it a compiler bug,
> but a documentation issue.
> 
> Hope that helps,
> 
> Andreas
>

On 01/11/20 12:36, Claudio Driussi wrote:

> I have another issue with debugger. I have to recompile my
> dll each time I try to debug functions in DLL, if I didn't
> debugger pointer go to a wrong position. I will try to renane
> to see if belongs to the same problem.

No.

In my DLL, if I change an source file, often (but not always)
the pointer of debugger breakpoints will mistake position.

I did some tries but at the moment I can't replicate the error
in a ripetible way. I will try to build a simplee project
to show it.

Claudio


> 
> Regards
> 
> Claudio
> 
> In 01/11/20 01:46, Andreas Gehrs-Pahl wrote:
>> Claudio,
>>
>>> Seems to me that there are a not documented function FileExt
>>> in the XPP library which goes to conflict.
>>
>> You are right, there is a function called FileExt in the XppRT1 
>> (Runtime 1)
>> DLL since version 1.90.317, released 03/24/2005 ("Cape Horn" Beta 3). 
>> But if
>> you try ot call that function, you will get an error "Function is not
>> declared". This is also true for several other functions, like: FDrive(),
>> FPath(), FPathAdd(), FPathMerge(), etc., while some others can be called,
>> like: FTimeCmp(), GetCurDir(), Hash2Bin(), LL2Bin(), SendAppEvent() 
>> and many
>> more. Some of those might be internal or experimental functions 
>> (procedures
>> or classes), which won't be there in the future or they might be added to
>> the documentation at a later time.
>>
>> It would be nice if Alaska would document those (and several other of the
>> undocumented features/functions), though I wouldn't call it a compiler 
>> bug,
>> but a documentation issue.
>>
>> Hope that helps,
>>
>> Andreas
>>
>