interfacing function of a complex number

[Fred Jendrzejewski]

Hello,

I created a function with complex numbers in python and now I'd like to
compile it in swig to speed it all up by creating a function of the type
double complex c2(x).

But when I want to compile it with setup.py it is creating the following
error:

python setup.py build_ext --inplace
running build_ext
building '_test' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall
-Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c test_wrap.c -o
build/temp.linux-i686-2.6/test_wrap.o
test_wrap.c:2514: erreur: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘c2’
test_wrap.c: In function ‘_wrap_c2’:
test_wrap.c:2569: erreur: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘result’
test_wrap.c:2569: erreur: ‘result’ undeclared (first use in this function)
test_wrap.c:2569: erreur: (Each undeclared identifier is reported only once
test_wrap.c:2569: erreur: for each function it appears in.)
test_wrap.c:2577: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2577: attention : implicit declaration of function ‘c2’
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: valeur de pointeur utilisée là où une valeur à
virgule flottante était attendue
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: incompatible type for argument 1 of ‘memcpy’
test_wrap.c:2578: erreur: valeur de pointeur utilisée là où une valeur à
virgule flottante était attendue
test_wrap.c:2578: erreur: incompatible type for argument 1 of
‘SWIG_Python_NewPointerObj’
error: command 'gcc' failed with exit status 1

The strangest thing for me is that the first error is that he can't
handle the complex argument, as line 2514 is :

extern double complex c2(double x);


So what am I doing wrong ? I already tested what happend if I skip the
complex argument. Then everything is compiling fine but python is
failing with an segmentation fault. I included complex and everything
else is straight-forward. I attach the concerned files for test issues


Would be great If someone could help me.

Bye,
        Fred

***** test.i *******


/* test.i */
%module test
%{
/* Put header files here or function declarations like below */
extern double complex c2(double x);
%}
extern double complex c2(double x);

********** test.c **********

#include <math.h>
#include <complex.h>

double complex c2(double x) {
     double complex ph = I*x;
     return cexp(x);
}



**** setup.py *****

#!/usr/bin/env python

"""
setup.py file for fast correlation library
"""

from distutils.core import setup, Extension
from Cython.Distutils import build_ext


test_module = Extension('_test',
                            sources=['test_wrap.c', 'test.c'],
                            )

setup (name = 'Test',
        version = '0.1',
        author      = "Fred Jendrzejewski",
        description = """Propagating fields around""",
        ext_modules = [test_module],
        py_modules = ["test"],
        )

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[David Beazley-3]

As far as I know, support for the "double complex" datatype isn't even  
supported by Swig unless someone has patched it to support C99.   That  
said, it may be the case that the C compiler itself doesn't support it  
unless certain compiler flags are enabled.    You might want to check  
the options to gcc to see if there is some kind of compiler flag that  
needs to be turned on to support the double complex datatype.

Cheers,
Dave


On Sep 23, 2009, at 12:36 PM, Fred Jendrzejewski wrote:

> Hello,
>
> I created a function with complex numbers in python and now I'd like  
> to
> compile it in swig to speed it all up by creating a function of the  
> type
> double complex c2(x).
>
> But when I want to compile it with setup.py it is creating the  
> following
> error:
>
> python setup.py build_ext --inplace
> running build_ext
> building '_test' extension
> gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall
> -Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c test_wrap.c -o
> build/temp.linux-i686-2.6/test_wrap.o
> test_wrap.c:2514: erreur: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
> ‘__attribute__’ before ‘c2’
> test_wrap.c: In function ‘_wrap_c2’:
> test_wrap.c:2569: erreur: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
> ‘__attribute__’ before ‘result’
> test_wrap.c:2569: erreur: ‘result’ undeclared (first use in this  
> function)
> test_wrap.c:2569: erreur: (Each undeclared identifier is reported  
> only once
> test_wrap.c:2569: erreur: for each function it appears in.)
> test_wrap.c:2577: erreur: expected ‘)’ before ‘complex’
> test_wrap.c:2577: attention : implicit declaration of function ‘c2’
> test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
> test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
> test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
> test_wrap.c:2578: erreur: valeur de pointeur utilisée là où une  
> valeur à
> virgule flottante était attendue
> test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
> test_wrap.c:2578: erreur: incompatible type for argument 1 of ‘memcpy’
> test_wrap.c:2578: erreur: valeur de pointeur utilisée là où une  
> valeur à
> virgule flottante était attendue
> test_wrap.c:2578: erreur: incompatible type for argument 1 of
> ‘SWIG_Python_NewPointerObj’
> error: command 'gcc' failed with exit status 1
>
> The strangest thing for me is that the first error is that he can't
> handle the complex argument, as line 2514 is :
>
> extern double complex c2(double x);
>
>
> So what am I doing wrong ? I already tested what happend if I skip the
> complex argument. Then everything is compiling fine but python is
> failing with an segmentation fault. I included complex and everything
> else is straight-forward. I attach the concerned files for test issues
>
>
> Would be great If someone could help me.
>
> Bye,
> Fred
>
> ***** test.i *******
>
>
> /* test.i */
> %module test
> %{
> /* Put header files here or function declarations like below */
> extern double complex c2(double x);
> %}
> extern double complex c2(double x);
>
> ********** test.c **********
>
> #include <math.h>
> #include <complex.h>
>
> double complex c2(double x) {
>     double complex ph = I*x;
>     return cexp(x);
> }
>
>
>
> **** setup.py *****
>
> #!/usr/bin/env python
>
> """
> setup.py file for fast correlation library
> """
>
> from distutils.core import setup, Extension
> from Cython.Distutils import build_ext
>
>
> test_module = Extension('_test',
>                            sources=['test_wrap.c', 'test.c'],
>                            )
>
> setup (name = 'Test',
>        version = '0.1',
>        author      = "Fred Jendrzejewski",
>        description = """Propagating fields around""",
>        ext_modules = [test_module],
>        py_modules = ["test"],
>        )
>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry® Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart  
> your
> developing skills, take BlackBerry mobile applications to market and  
> stay
> ahead of the curve. Join us from November 9-12, 2009. Register  
> now!
> http://p.sf.net/sfu/devconf
> _______________________________________________
> Swig-user mailing list
> Swig-user@...
> https://lists.sourceforge.net/lists/listinfo/swig-user

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[Fletcher, John P]

Fred

I have done some work on interfacing complex numbers to ruby using Swig.  From memory I used the C++ header <complex> instead of <complex.h>.  I am away from base at the moment until the end of next week and cannot access my files on this until I am home.

John

________________________________________
From: Fred Jendrzejewski [fred.jen@...]
Sent: 23 September 2009 18:36
To: swig-user@...
Subject: [Swig-user] interfacing function of a complex number

Hello,

I created a function with complex numbers in python and now I'd like to
compile it in swig to speed it all up by creating a function of the type
double complex c2(x).

But when I want to compile it with setup.py it is creating the following
error:

python setup.py build_ext --inplace
running build_ext
building '_test' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall
-Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c test_wrap.c -o
build/temp.linux-i686-2.6/test_wrap.o
test_wrap.c:2514: erreur: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘c2’
test_wrap.c: In function ‘_wrap_c2’:
test_wrap.c:2569: erreur: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘result’
test_wrap.c:2569: erreur: ‘result’ undeclared (first use in this function)
test_wrap.c:2569: erreur: (Each undeclared identifier is reported only once
test_wrap.c:2569: erreur: for each function it appears in.)
test_wrap.c:2577: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2577: attention : implicit declaration of function ‘c2’
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: valeur de pointeur utilisée là où une valeur à
virgule flottante était attendue
test_wrap.c:2578: erreur: expected ‘)’ before ‘complex’
test_wrap.c:2578: erreur: incompatible type for argument 1 of ‘memcpy’
test_wrap.c:2578: erreur: valeur de pointeur utilisée là où une valeur à
virgule flottante était attendue
test_wrap.c:2578: erreur: incompatible type for argument 1 of
‘SWIG_Python_NewPointerObj’
error: command 'gcc' failed with exit status 1

The strangest thing for me is that the first error is that he can't
handle the complex argument, as line 2514 is :

extern double complex c2(double x);


So what am I doing wrong ? I already tested what happend if I skip the
complex argument. Then everything is compiling fine but python is
failing with an segmentation fault. I included complex and everything
else is straight-forward. I attach the concerned files for test issues


Would be great If someone could help me.

Bye,
        Fred

***** test.i *******


/* test.i */
%module test
%{
/* Put header files here or function declarations like below */
extern double complex c2(double x);
%}
extern double complex c2(double x);

********** test.c **********

#include <math.h>
#include <complex.h>

double complex c2(double x) {
     double complex ph = I*x;
     return cexp(x);
}



**** setup.py *****

#!/usr/bin/env python

"""
setup.py file for fast correlation library
"""

from distutils.core import setup, Extension
from Cython.Distutils import build_ext


test_module = Extension('_test',
                            sources=['test_wrap.c', 'test.c'],
                            )

setup (name = 'Test',
        version = '0.1',
        author      = "Fred Jendrzejewski",
        description = """Propagating fields around""",
        ext_modules = [test_module],
        py_modules = ["test"],
        )

------------------------------------------------------------------------------
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developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9-12, 2009. Register now!
http://p.sf.net/sfu/devconf
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