how to call this dll in python

[Diez B. Roggisch]

Shark schrieb:
> On Nov 3, 4:22 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Shark schrieb:
>>
>>> I have a windows dll1.dll with a export function:
>>> int f1(char filename,char **buf,int *bufLen)
>>> {
>>> int len;
>>> //got the length of file anyway,such as 100
>>> len = 100;//len = getLen(filename);
>>> *buf = (char*)calloc(100);
>>> *bufLen = len;
>>> return 0;
>>> }
>>> then how can I call the f1 function with python.
>>> thanks for your response.
>> If the above is *really* what you want to access from python, you
>> shouldn't bother & write it new in python itself. You could either use
>>
>> bufLen = len(open(filename).read())
>>
>> or make a os.stat-call.
>>
>> If it serves only as a rather ugly illustrative example, then you should
>> investigate the ctypes-module of python, which is made for accessing
>> arbitrary dlls from python.
>>
>> Diez
> 
> Yes,the function is rather ugly, but how can python get the memory
> alloced by a dll through the dll function's parameter.
> I am facing the problem in my project, I try ctypes all over, but can
> not get the correct solution.

But it *will* work with ctypes. However, without you disclosing your 
actual attempts, how do you think we can help you? Mind-reading is on my 
list to learn next, but until then you will need to provide code & 
tracebacks.

Diez