Passing a FILE* from Python into a MinGW/SWIG module

[John Pye]

Hi all

I understand that I can't hope to pass a FILE* from the Windows
version of Python into a SWIG module that I've built using MinGW gcc/g+
+, because apparently the FILE* structure are different and
incompatible.

Is there an official workaround for this? Presumably I need to
implement a mingw-compatible version of all the 'file' class in
Python, eg

import mingw
import myswigmodule

F1 = mingw.file("newfile.txt","rw")
F1.write("somestuff")
F1.seek(0)
F2 = mingw.tmpfile()
myswigmodule.dosomething(F1,F2)
F2.seek(0)
print F2.read()

Has anyone done this? Is there a better way that doesn't require users
of my module to adapt? Do I have to use the dreaded MSVS to compile my
SWIG module?

Cheers
JP

[Ross Ridge]

John Pye <jo******@gmail.comwrote:

>Is there an official workaround for this? Presumably I need to
implement a mingw-compatible version of all the 'file' class in
Python, eg

I'm not familiar with SWIG, but why not pass Python's own file class?
Method calls on Python's file class will be dispatched to C code in
the Python interpreter and so will use the C runtime that Python was
linked with.

Ross Ridge

--
l/ // Ross Ridge -- The Great HTMU
[oo][oo] rr****@csclub.uwaterloo.ca
-()-/()/ http://www.csclub.uwaterloo.ca/~rridge/
db //

[Tommy Nordgren]

On 14 mar 2007, at 11.57, John Pye wrote:

Hi all

I understand that I can't hope to pass a FILE* from the Windows
version of Python into a SWIG module that I've built using MinGW
gcc/g+
+, because apparently the FILE* structure are different and
incompatible.

Is there an official workaround for this? Presumably I need to
implement a mingw-compatible version of all the 'file' class in
Python, eg

import mingw
import myswigmodule

F1 = mingw.file("newfile.txt","rw")
F1.write("somestuff")
F1.seek(0)
F2 = mingw.tmpfile()
myswigmodule.dosomething(F1,F2)
F2.seek(0)
print F2.read()

Has anyone done this? Is there a better way that doesn't require users
of my module to adapt? Do I have to use the dreaded MSVS to compile my
SWIG module?

Cheers
JP

Can you get the file descriptor from the FILE *, and use that?

-------------------------------------
This sig is dedicated to the advancement of Nuclear Power
Tommy Nordgren
to************@comhem.se