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// Simple database-like module.
// This shows how one can convert to and from C structures
// and Python tuples
%module db
%{
#include "db.h"
%}
// We use a typemap to define how we want to parse User records
// Define how a User record is to be passed into a C function
// This works for both "User" and "User *"
%typemap(python,in) User * {
static User temp; /* A temporary holding place */
char *login,*name,*home; /* Temporary variables */
if (!PyArg_ParseTuple($source,"siiss",&login,&temp.uid,&temp.gid,&name,&home))
return NULL;
/* Safely copy passed values into our structure */
strncpy(temp.login,login,16);
strncpy(temp.name,name,32);
strncpy(temp.home,home,256);
/* Set the User * pointer to our temporary structure */
$target = &temp;
}
// Describe how we want to return a user record
%typemap(python,out) User * {
if ($source) {
$target = Py_BuildValue("(siiss)",$source->login,$source->uid,
$source->gid,$source->name,$source->home);
} else {
$target = Py_None;
Py_INCREF(Py_None);
}
}
extern void add_user(User u);
extern void sort_users();
extern User *lookup_user(char *name);
extern User *get_user(int index);
extern int num_users();
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