toy matrices

toy-matrix.zeek

# A toy example showing pure scriptland matrix types. Good luck multiplying anything.

module Matrix;

export {
  type matrix_int: vector of vector of int;
  type matrix_dbl: vector of vector of double;

  global make_matrix_int: function(rows: count, cols: count): matrix_int;
  global make_matrix_dbl: function(rows: count, cols: count): matrix_dbl;
}

function Matrix::make_int_matrix(rows: count, cols: count): Matrix::matrix_int {
  local matrix: Matrix::matrix_int;
  local r: count = 0;
  local c: count = 0;

  while (r < rows) {
    matrix[r] = vector();
    while (c < cols) {
      matrix[r][c] = 0;
      c += 1;
    }
    c = 0;
    r += 1;
  }

  return matrix;
}

function Matrix::make_dbl_matrix(rows: count, cols: count): Matrix::matrix_dbl {
  local matrix: Matrix::matrix_dbl;
  local r: count = 0;
  local c: count = 0;

  while (r < rows) {
    matrix[r] = vector();
    while (c < cols) {
      matrix[r][c] = 0;
      c += 1;
    }
    c = 0;
    r += 1;
  }

  return matrix;
}


event zeek_init() {
  local m_i: Matrix::matrix_int = Matrix::make_int_matrix(3, 5);
  print m_i;

  local m_d: Matrix::matrix_dbl = Matrix::make_dbl_matrix(3, 5);
  print m_d;
}

resize() may be helpful too.
https://docs.zeek.org/en/current/scripts/base/bif/zeek.bif.zeek.html#id-resize