SSSim

#define MAX(a,b) ((a) > (b) ? (a) : (b))

#define MIN(a,b) ((a) < (b) ? (a) : (b))

int matrix_make_bidir(struct matrix * m)

{

	int res = 0;

	matsize i, j;

	matvalue v;

	if (m)

	{

		for(i = 0; i < m->rows; i++)

			for(j = 0; j < m->cols; j++)

			{

				v = MIN(MAT_GET(m, i, j), MAT_GET(m, j, i));

				if (v == 0)

				{

					v = MAX(MAT_GET(m, i, j), MAT_GET(m, j, i));

					MAT_SET(m, i, j, v);

					MAT_SET(m, j, i, v);

				}

			}

	} else

		res = -1;

	return res;

}