/trunk/Examples/lua/arrays/example.i

 1/* File : example.i */
 2%module example
 3
 4/* in this file there are two sorting functions
 5and three different ways to wrap them.
 6
 7See the lua code for how they are called
 8*/
 9
10%include <carrays.i>    // array helpers
11
12// this declares a batch of function for manipulating C integer arrays
13%array_functions(int,int)
14
15// this adds some lua code directly into the module
16// warning: you need the example. prefix if you want it added into the module
17// addmittedly this code is a bit tedious, but its a one off effort
18%luacode {
19function example.sort_int2(t)
20 local len=table.maxn(t) -- the len
21 local arr=example.new_int(len)
22 for i=1,len do
23  example.int_setitem(arr,i-1,t[i]) -- note: C index is one less then lua indea
24 end
25 example.sort_int(arr,len) -- call the fn
26 -- copy back
27 for i=1,len do
28  t[i]=example.int_getitem(arr,i-1) -- note: C index is one less then lua indea
29 end
30 example.delete_int(arr) -- must delete it
31end
32}
33
34// this way uses the SWIG-Lua typemaps to do the conversion for us
35// the %apply command states to apply this wherever the argument signature matches
36%include <typemaps.i>
37%apply (double *INOUT,int) {(double* arr,int len)};
38
39%inline %{
40extern void sort_int(int* arr, int len);
41extern void sort_double(double* arr, int len);
42%}