dlib C++ Library - example_mex_struct.cpp

// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
#include "call_matlab.h"
#include "dlib/matrix.h"
using namespace dlib;
using namespace std;
/*
 This mex function takes a MATLAB struct, prints a few of its fields,
 and then returns a new struct.
 For example, you can call this function in MATLAB like so:
 input = {}
 input.val = 2
 input.stuff = 'some string'
 output = example_mex_struct(input)
 output.number
 output.number2
 output.sub.stuff
 output.sub.some_matrix
*/
void mex_function (
 const matlab_struct& input,
 matlab_struct& output 
) 
{
 int val = input["val"];
 string stuff = input["stuff"];
 if (input.has_field("val2")) 
 {
 string val2 = input["val2"];
 cout << "The optional val2 field was set to: " << val2 << endl;
 }
 cout << "val: "<< val << endl;
 cout << "stuff: " << stuff << endl;
 output["number"] = 999;
 output["number2"] = 1000;
 output["sub"]["stuff"] = "some other string";
 matrix<double> m = randm(2,2);
 output["sub"]["some_matrix"] = m;
}
// #including this brings in all the mex boiler plate needed by MATLAB.
#include "mex_wrapper.cpp"