Passng double pointer to 'c' function

Hello,

 

I would like to know hot to pass address reference to ‘c’ function through python. I am using swig for ‘c’ anf python interfacing

 

Interface file is:

 

%module stud

%include "cpointer.i"

%include "cmalloc.i"

%include "cstring.i"

%include "carrays.i"

%include "cdata.i"

 

%header%{

#include "stud.h"

%}

 

%include "stud.h"

 

 

%pointer_functions(int, intp);

%malloc(int);

%free(int);

%array_functions(char *,charp );

 

%inline %{

extern int sum2(int *,int, int *,char *param);

extern int sum1(stud2 s);

extern int parse_n_encode(const long gtpp_dict, int use_binary_addr_format,

                 int lrsn, const char *gcdr_node_id_str, int show_gcdr,

                 const long gcdr_len, char *ptr, char **s,

                 int custom7_fileformat_flag);

%}

 

%inline %{

  int print_args(char **argv) {

    int i = 0;

    for(i=0;i<=180;i++) {

      printf("argv[%d] = %c\n", i,*(argv[i]));

      i++;

    }

    return i;

  }

%}

 

 

 

 

From python I am using following

 

 

>>> f=open(fname,'r')

>>> f.read(28)

"\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00'\xd8\x00\x00\x00\x00\x00\x1bd\x98\x00\x00\x00\x07\x00\x00\

>>> tmp=f.read(172)

>>> tmp

'\xb5\x81\xa9\x80\x01\x13\x83\x08B\x00!C\x00\x00\x00\xf0\xa4\r\x82\x0b192.168.1.1\x85\x04\x16\xd1@~\

87\x04apn1\x88\x02\xf1!\xa9\x0c\xa0\n\x82\x0811.0.0.1\x8b\x01\xff\xac806\xa1\x0e\x81\x0c\x00"r\r\x93

e\x81\x0c\x00"r\r\x93\x96xxv\x00\x00\x00\x83\x03\x0f\xa0\x00\x84\x01\x00\x85\x01\x02\x86\t\x08\x07\x

8\x07\x01\x16\x19\x17+\x050\x8e\x01\x0f\x8f\x01\x10\x91\x01\x01\x95\x01\x01\x96\x06\x91\x89gE#\x01\x

>>> import stud

>>> from stud import *

>>> cp=malloc_charp()

>>> stud.parse_n_encode(1,1,65464,'rajasgtfer',1,172,tmp,cp,0)

171

>>> c

<Swig Object of type 'char **' at 0x286468>

 

 

>>> 

 

 

 

Now I want read  value of  cp in python… How do I do it.

Any type of help is appreciated.

 

 

Thanks,

Rajashree.

Hello,

 

I would like to know hot to pass address reference to ‘c’ function through python. I am using swig for ‘c’ anf python interfacing

 

Interface file is:

 

%module stud

%include "cpointer.i"

%include "cmalloc.i"

%include "cstring.i"

%include "carrays.i"

%include "cdata.i"

 

%header%{

#include "stud.h"

%}

 

%include "stud.h"

 

 

%pointer_functions(int, intp);

%malloc(int);

%free(int);

%array_functions(char *,charp );

 

%inline %{

extern int sum2(int *,int, int *,char *param);

extern int sum1(stud2 s);

extern int parse_n_encode(const long gtpp_dict, int use_binary_addr_format,

                 int lrsn, const char *gcdr_node_id_str, int show_gcdr,

                 const long gcdr_len, char *ptr, char **s,

                 int custom7_fileformat_flag);

%}

 

%inline %{

  int print_args(char **argv) {

    int i = 0;

    for(i=0;i<=180;i++) {

      printf("argv[%d] = %c\n", i,*(argv[i]));

      i++;

    }

    return i;

  }

%}

 

 

 

 

From python I am using following

 

 

>>> f=open(fname,'r')

>>> f.read(28)

"\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00'\xd8\x00\x00\x00\x00\x00\x1bd\x98\x00\x00\x00\x07\x00\x00\

>>> tmp=f.read(172)

>>> tmp

'\xb5\x81\xa9\x80\x01\x13\x83\x08B\x00!C\x00\x00\x00\xf0\xa4\r\x82\x0b192.168.1.1\x85\x04\x16\xd1@~\

87\x04apn1\x88\x02\xf1!\xa9\x0c\xa0\n\x82\x0811.0.0.1\x8b\x01\xff\xac806\xa1\x0e\x81\x0c\x00"r\r\x93

e\x81\x0c\x00"r\r\x93\x96xxv\x00\x00\x00\x83\x03\x0f\xa0\x00\x84\x01\x00\x85\x01\x02\x86\t\x08\x07\x

8\x07\x01\x16\x19\x17+\x050\x8e\x01\x0f\x8f\x01\x10\x91\x01\x01\x95\x01\x01\x96\x06\x91\x89gE#\x01\x

>>> import stud

>>> from stud import *

>>> cp=malloc_charp()

>>> stud.parse_n_encode(1,1,65464,'rajasgtfer',1,172,tmp,cp,0)

171

>>> c

<Swig Object of type 'char **' at 0x286468>

 

 

>>> 

 

 

 

Now I want read  value of  cp in python… How do I do it.

Any type of help is appreciated.

 

 

Thanks,

Rajashree.