matrix.ljs

let assert = require("assert");

extern describe, it, console;


struct Matrix {
  float elements[2][2];

  static function mul(Matrix * a, Matrix * b, Matrix * c) {
    for (let int j = 0; j < 2; j++) {
      for (let int k = 0; k < 2; k++) {
        for (let int i = 0; i < 2; i++) {
          c->elements[i][j] += a->elements[i][k] * b->elements[k][j];
        }
      }
    }
  }
}

describe('Matrix', function() {
  it('Multiply', function () {
    let Matrix a, b, c, d;
    a.elements[0][0] = 1;
    a.elements[0][1] = 2;
    a.elements[1][0] = 3;
    a.elements[1][1] = 4;

    b.elements[0][0] = 0;
    b.elements[0][1] = 0;
    b.elements[1][0] = 0;
    b.elements[1][1] = 0;

    c.elements[0][0] = 0;
    c.elements[0][1] = 0;
    c.elements[1][0] = 0;
    c.elements[1][1] = 0;

    Matrix.mul(&a, &a, &b);

    assert (b.elements[0][0] === 7);
    assert (b.elements[0][1] === 10);
    assert (b.elements[1][0] === 15);
    assert (b.elements[1][1] === 22);

    Matrix.mul(&a, &b, &c);

    assert (c.elements[0][0] === 37);
    assert (c.elements[0][1] === 54);
    assert (c.elements[1][0] === 81);
    assert (c.elements[1][1] === 118);

  });
});


describe('Structs', function() {
  it('allocates an union', function () {

  });
});