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%module(directors="1") example
%inline %{
// Helper functions for converting string arrays
#include <stdlib.h>
void *alloc_ptr_array(unsigned int len)
{
return calloc(len, sizeof(void *));
}
void set_ptr_array(void *ain, unsigned int pos, void *val)
{
void **a = (void **) ain;
a[pos] = val;
}
void *get_ptr_array(void *ain, unsigned int pos)
{
void **a = (void **) ain;
return a[pos];
}
void free_ptr_array(void *ain)
{
void **a = (void **) ain;
unsigned int i;
if (!a)
return;
for (i = 0; a[i]; i++) {
free(a[i]);
}
free(a);
}
char *uintptr_to_string(void *in)
{
return (char *) in;
}
void *string_to_uintptr(char *in)
{
return strdup(in);
}
%}
// These typemaps convert between an array of strings in Go and a
// const char** that is NULL terminated in C++.
%typemap(gotype) (const char * const *) "[]string"
%typemap(imtype) (const char * const *) "uintptr"
%typemap(goin) (const char * const *) {
if $input == nil || len($input) == 0 {
$result = 0
} else {
$result = Alloc_ptr_array(uint(len($input) + 1))
defer func() {
Free_ptr_array($result)
}()
var i uint
for i = 0; i < uint(len($input)); i++ {
Set_ptr_array($result, i, String_to_uintptr($input[i]))
}
}
}
%typemap(in) (const char * const *) {
$1 = (char **) $input;
}
%typemap(godirectorin) (const char * const *) {
if ($input == 0) {
$result = nil
} else {
var i uint
for i = 0; ; i++ {
var v uintptr = Get_ptr_array($input, i)
if v == 0 {
break
}
}
if i == 0 {
$result = nil
} else {
$result = make([]string, i)
for i = 0; ; i++ {
var v uintptr = Get_ptr_array($input, i)
if v == 0 {
break
}
$result[i] = Uintptr_to_string(v)
}
}
}
}
%feature("director") callbacks;
%inline %{
class callbacks {
public:
virtual bool call1(int v, const char * const *strarray);
virtual ~callbacks() {}
};
bool check1(callbacks *c, int v, const char * const *strarray) {
return c->call1(v, strarray);
}
bool callbacks::call1(int v, const char * const *strarray) {
return false;
}
%}
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