libusb-win32-devel

Re: [Libusb-win32-devel] =?iso-8859-15?q?libusb-win32_and_ctypes_code?= =?iso-8859-15?q?generator_attempt=2E=2E=2E?=

[Stephan M. <ste...@we...>]

> I just tried to wrap libusb0.dll with ctypes' codegenerator,=20
> http://starship.python.net/crew/theller/ctypes/old/codegen.html
> >python  C:\Python24\Lib\site-packages\ctypes\wrap\h2xml.py usb.h -o usb=
.xml -c
> OK
> >C:\Python24\Lib\site-packages\ctypes\wrap\xml2py.py usb.xml -l libusb0.=
dll -o usb.py
> which seems to go OK, mostly, but I get a zillion:
>=20
> # unresolved alias: AddPrintProcessor =3D AddPrintProcessorA
> # unresolved alias: VarUI2FromInt =3D VarUI2FromI4

These are symbols exported by some of Windows' system DLLs. The errors
might be caused by the fact that usb.h includes windows.h and stdlib.h.
Try to remove these includes from the header before running the code gener=
ator.

> ...
> What extra header do I need to allow the script to resolve these referen=
ces in the dll=3F

You don't need any extra headers, just usb.h.

> Is this a (also) question for ctypes-users=3F
>=20
> Ray Schumacher
>=20
>=20
> ------------------------------------------------------------------------=
-
> Using Tomcat but need to do more=3F Need to support web services, security=
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asier
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Re: [Libusb-win32-devel] libusb-win32 and ctypes code generator attempt...

[RayS <ra...@bl...>]

Thanks Stephan, I'll give it another try Monday.

Ray

At 08:32 AM 9/9/2006, you wrote:
> > I just tried to wrap libusb0.dll with ctypes' codegenerator,
> > http://starship.python.net/crew/theller/ctypes/old/codegen.html
> > >python  C:\Python24\Lib\site-packages\ctypes\wrap\h2xml.py usb.h 
> -o usb.xml -c
> > OK
> > >C:\Python24\Lib\site-packages\ctypes\wrap\xml2py.py usb.xml -l 
> libusb0.dll -o usb.py
> > which seems to go OK, mostly, but I get a zillion:
> >
> > # unresolved alias: AddPrintProcessor = AddPrintProcessorA
> > # unresolved alias: VarUI2FromInt = VarUI2FromI4
>
>These are symbols exported by some of Windows' system DLLs. The errors
>might be caused by the fact that usb.h includes windows.h and stdlib.h.
>Try to remove these includes from the header before running the code 
>generator.
>
> > ...
> > What extra header do I need to allow the script to resolve these 
> references in the dll?
>
>You don't need any extra headers, just usb.h.

Re: [Libusb-win32-devel] libusb-win32 and ctypes code generator attempt...

[Ray S. <ra...@bl...>]

If I don't use the -c for including #defines symbols libusb wraps OK! :
>python  C:\Python24\Lib\sitepackages\ctypes\wrap\h2xml.py usb.h -o usb.xml
>python C:\Python24\Lib\site-packages\ctypes\wrap\xml2py.py usb.xml -l libusb0.dll -o usb.py -v -w
###########################
# Symbols defined:
#
# Variables:            486
# Struct/Unions:       1188
# Functions:           3388
# Enums:                 98
# Enum values:          592
# Typedefs:            3162
# Pointertypes:        1433
# Arraytypes:            96
# unknown functions:   1653
#
# Total symbols:  9365
###########################
needed 1 loop(s)

(still lots of "unknown functions" like
  function RpcMgmtBindingInqParameter not found in any dll
  function ltoa not found in any dll
I had also uncommented line 537 in codegenerator.py
Are these needed?)


Using -c, still has problems/madness. Is the extra #define including useful here?  It is a huge increase. Mainly, are these extra #define symbols really required for the Python wrapper?

Using -c, I tried removing all #include lines from usb.h, no change.
I then added the -w switch to have it search WIndows DLLs, which reduced the unresolved from 700+ to ~80:
>C:\Python24\Lib\site-packages\ctypes\wrap\xml2py.py usb.xml -l libusb0.dll -o usb.py -v -w

It is picking up these aliases from libusb0.dll itself, apparently. They have ASCII text references visible in the .dll, but the aliases do not appear to be in the libusb-win32-src files - I assume they are included from there, at some point?

Can I just ignore these 80 unresolved aliases? Can I safely just exclude them with an h2xml.cfg? Will the Python wrapper "care" if they are? 
typical examples:
  VarUI4FromUI1 (in Oleaut32.lib )
  QueryServiceConfig2A ( Advapi32.lib )


End of a typical verbose output:
...
# unresolved alias: RpcNsEntryExpandName = RpcNsEntryExpandNameA
# unresolved alias: WINGDIAPI = DECLSPEC_IMPORT
###########################
# Symbols defined:
#
# Variables:          10243
# Struct/Unions:       1188
# Functions:           3388
# Enums:                 98
# Enum values:          592
# Typedefs:            3162
# Pointertypes:        1433
# Arraytypes:            96
# unknown functions:   1655
#
# Total symbols:  9365
###########################
needed 1 loop(s)

I'll cross post to ctypes...

Thanks,
Ray





At 10:14 AM 9/9/2006, RayS wrote:

>Thanks Stephan, I'll give it another try Monday.
>
>Ray
>
>At 08:32 AM 9/9/2006, you wrote:
>> > I just tried to wrap libusb0.dll with ctypes' codegenerator,
>> > http://starship.python.net/crew/theller/ctypes/old/codegen.html
>> > >python  C:\Python24\Lib\site-packages\ctypes\wrap\h2xml.py usb.h 
>> -o usb.xml -c
>> > OK
>> > >C:\Python24\Lib\site-packages\ctypes\wrap\xml2py.py usb.xml -l 
>> libusb0.dll -o usb.py
>> > which seems to go OK, mostly, but I get a zillion:
>> >
>> > # unresolved alias: AddPrintProcessor = AddPrintProcessorA
>> > # unresolved alias: VarUI2FromInt = VarUI2FromI4
>>
>>These are symbols exported by some of Windows' system DLLs. The errors
>>might be caused by the fact that usb.h includes windows.h and stdlib.h.
>>Try to remove these includes from the header before running the code 
>>generator.
>>
>> > ...
>> > What extra header do I need to allow the script to resolve these 
>> references in the dll?
>>
>>You don't need any extra headers, just usb.h.
>
>
>
>
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