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Harish Murthy | 1 Nov 2003 01:32

problem with example (php)

Hi ,

I tried running the example under /SWIG-1.3.19/Examples/php4/simple/
and I get the example.so , but when I run the runme.php4,  I get the
below error,
PHP Warning:  dl() [http://www.php.net/function.dl]: Unable to load 
dynamic library './example.so' - ./example.so: cannot open shared object 
file: No such file or directory in 
/SWIG-1.3.19/Examples/php4/simple/example.php on line 19
PHP Fatal error:  Call to undefined function:  gcd() in 
/SWIG-1.3.19/Examples/php4/simple/runme.php4 on line 9

I did the following steps to get the .so

phpize
./configure
make
make install

Kindly advise...
Thanks
Harish

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Youichi Iwakiri | 1 Nov 2003 03:22
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Re: problem with example (php)

Hi, Harish

I have coped with it by applying following patch.
For details, please see http://bugs.php.net/bug.php?id=25183

--

-- 
Youichi Iwakiri

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Sam Liddicott | 1 Nov 2003 18:01

Re: problem with example (php)

Harish Murthy wrote:

> Hi ,
>
> I tried running the example under /SWIG-1.3.19/Examples/php4/simple/
> and I get the example.so , but when I run the runme.php4,  I get the
> below error,
> PHP Warning:  dl() [http://www.php.net/function.dl]: Unable to load 
> dynamic library './example.so' - ./example.so: cannot open shared 
> object file: No such file or directory in 
> /SWIG-1.3.19/Examples/php4/simple/example.php on line 19
> PHP Fatal error:  Call to undefined function:  gcd() in 
> /SWIG-1.3.19/Examples/php4/simple/runme.php4 on line 9
>
>
> I did the following steps to get the .so
>
> phpize
> ./configure
> make
> make install
>
>

Isn't this because the .so file isn't in your php library search path?
Look in your php.ini and see where it looks to load modules from/

Also look at "make test" in the generated makefile, you'll see how to 
test it we specify on the php command line where to look to find the .so
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Joost van Lawick | 3 Nov 2003 19:37
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C global array in Python

I am struggling to get access to a C array but no luck so far. I have read a
lot about arrays and structs in the manuals but I cannot find an example (or
answer..). I am trying to wrap a C library to be used from Python to get access
to an external comnputer interface board (K8000 Velleman). Here's part of the
.h file of the library:

  /* configuration and data matrix*/
  extern short AD_matrix[MaxChains][MaxADchannel+1];

  /* old configuration and data arrays  */
  /* they just point to the first chain */
  /* like this: IO[1] = IO_matrix[0][1] */
  extern short *AD;

and furthermore a lot of functions to set output channels or read input
channels. Data read from input channels is written into AD_matrix.

I just include this .h file into the .i file.
Then I swig around: $ swig -python -shadow k8000.i
and compile and link. So far so good.

In python I do:
>>> from k8000 import *
>>> SetAllIOChannels()    # yes! all leds are turned on
>>> ReadFromCard()        # I verified that input channel is altered
>>> print cvar.AD_matrix
_600d0240_p_a_16_1__short
>>> 

This is a string. How do I get my hands on the data?
(Continue reading)

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David Beazley | 3 Nov 2003 19:43
Favicon

C global array in Python

Joost van Lawick writes:
 > I am struggling to get access to a C array but no luck so far. I have read a
 > lot about arrays and structs in the manuals but I cannot find an example (or
 > answer..). I am trying to wrap a C library to be used from Python to get access
 > to an external comnputer interface board (K8000 Velleman). Here's part of the
 > .h file of the library:
 > 
 >   /* configuration and data matrix*/
 >   extern short AD_matrix[MaxChains][MaxADchannel+1];
 > 
 >   /* old configuration and data arrays  */
 >   /* they just point to the first chain */
 >   /* like this: IO[1] = IO_matrix[0][1] */
 >   extern short *AD;
 > 
 > and furthermore a lot of functions to set output channels or read input
 > channels. Data read from input channels is written into AD_matrix.
 > 
 > I just include this .h file into the .i file.
 > Then I swig around: $ swig -python -shadow k8000.i
 > and compile and link. So far so good.
 > 
 > In python I do:
 > >>> from k8000 import *
 > >>> SetAllIOChannels()    # yes! all leds are turned on
 > >>> ReadFromCard()        # I verified that input channel is altered
 > >>> print cvar.AD_matrix
 > _600d0240_p_a_16_1__short
 > >>> 
 >
(Continue reading)

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Joost van Lawick | 3 Nov 2003 19:51
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Re: C global array in Python

Thanks for the quick reply! However, when I include the inline into the .i file
I get the following error:

swig -shadow -python k8000.i
gcc -c -I/usr/local/include/python2.3 k8000_wrap.c
k8000_wrap.c:1909: redefinition of `_wrap_AD_matrix_get'
k8000_wrap.c:771: `_wrap_AD_matrix_get' previously defined here
k8000_wrap.c: In function `init_k8000':
k8000_wrap.c:2060: warning: passing arg 3 of `SWIG_addvarlink' from incompatible pointer type
make: *** [k8000_wrap.o] Error 1

Cheers,

Joost

On Mon, Nov 03, 2003 at 12:43:16PM -0600, David Beazley wrote:
> Joost van Lawick writes:
>  > I am struggling to get access to a C array but no luck so far. I have read a
>  > lot about arrays and structs in the manuals but I cannot find an example (or
>  > answer..). I am trying to wrap a C library to be used from Python to get access
>  > to an external comnputer interface board (K8000 Velleman). Here's part of the
>  > .h file of the library:
>  > 
>  >   /* configuration and data matrix*/
>  >   extern short AD_matrix[MaxChains][MaxADchannel+1];
>  > 
>  >   /* old configuration and data arrays  */
>  >   /* they just point to the first chain */
>  >   /* like this: IO[1] = IO_matrix[0][1] */
>  >   extern short *AD;
(Continue reading)

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David Beazley | 3 Nov 2003 19:53
Favicon

Re: C global array in Python

Joost van Lawick writes:
 > Thanks for the quick reply! However, when I include the inline into the .i file
 > I get the following error:
 > 
 > swig -shadow -python k8000.i
 > gcc -c -I/usr/local/include/python2.3 k8000_wrap.c
 > k8000_wrap.c:1909: redefinition of `_wrap_AD_matrix_get'
 > k8000_wrap.c:771: `_wrap_AD_matrix_get' previously defined here
 > k8000_wrap.c: In function `init_k8000':
 > k8000_wrap.c:2060: warning: passing arg 3 of `SWIG_addvarlink' from incompatible pointer type
 > make: *** [k8000_wrap.o] Error 1
 > 
Oh.  You might want to pick a different name for the helper function.
Maybe

   AD_matrix_getitem()

(I think _get is already used).  oops.

- Dave
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Joost van Lawick | 3 Nov 2003 19:57
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Re: C global array in Python

Thanks, it all makes out allright. I get values but have to go home first to
turn on the k8000 board! I'll let you you know if I can read the IO channels.

Cheers,

Joost

On Mon, Nov 03, 2003 at 12:53:05PM -0600, David Beazley wrote:
> Joost van Lawick writes:
>  > Thanks for the quick reply! However, when I include the inline into the .i file
>  > I get the following error:
>  > 
>  > swig -shadow -python k8000.i
>  > gcc -c -I/usr/local/include/python2.3 k8000_wrap.c
>  > k8000_wrap.c:1909: redefinition of `_wrap_AD_matrix_get'
>  > k8000_wrap.c:771: `_wrap_AD_matrix_get' previously defined here
>  > k8000_wrap.c: In function `init_k8000':
>  > k8000_wrap.c:2060: warning: passing arg 3 of `SWIG_addvarlink' from incompatible pointer type
>  > make: *** [k8000_wrap.o] Error 1
>  > 
> Oh.  You might want to pick a different name for the helper function.
> Maybe
> 
>    AD_matrix_getitem()
> 
> (I think _get is already used).  oops.
> 
> - Dave

--

--
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Joost van Lawick | 3 Nov 2003 21:09
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Re: C global array in Python

Hello,

It all works fine! I can read and write data to the k8000 board from Python.
Thanks for all the help. Looking at the additional lines in the .i, I notice in
the wrapper function a thing called 'data'. I cannot find it anywhere, so is
this a SWIG specific thing?

Cheers,

Joost

On Mon, Nov 03, 2003 at 12:53:05PM -0600, David Beazley wrote:
> Joost van Lawick writes:
>  > Thanks for the quick reply! However, when I include the inline into the .i file
>  > I get the following error:
>  > 
>  > swig -shadow -python k8000.i
>  > gcc -c -I/usr/local/include/python2.3 k8000_wrap.c
>  > k8000_wrap.c:1909: redefinition of `_wrap_AD_matrix_get'
>  > k8000_wrap.c:771: `_wrap_AD_matrix_get' previously defined here
>  > k8000_wrap.c: In function `init_k8000':
>  > k8000_wrap.c:2060: warning: passing arg 3 of `SWIG_addvarlink' from incompatible pointer type
>  > make: *** [k8000_wrap.o] Error 1
>  > 
> Oh.  You might want to pick a different name for the helper function.
> Maybe
> 
>    AD_matrix_getitem()
> 
> (I think _get is already used).  oops.
(Continue reading)

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Mike Romberg | 3 Nov 2003 21:41
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Favicon

python -modern switch


  I just tried out the CVS version of swig with a big swig wrapped
bunch of C++ we use here.  And I have nothing bad to report :).  In
fact the -modern switch is really great.  It produces code that is at
least as fast as swig-1.1p5.  This is great as it was the last issue I
really had after switching from 1.1p5 to the 1.3 series of SWIG.
Thanks for all the great work everyone is doing to make SWIG such a
useful tool.

Mike Romberg (mike.romberg <at> noaa.gov)
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Swig maillist  -  Swig <at> cs.uchicago.edu
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