return mat;
}
+__isl_give isl_mat *isl_mat_insert_cols(__isl_take isl_mat *mat,
+ unsigned col, unsigned n)
+{
+ isl_mat *ext;
+
+ if (!mat)
+ return NULL;
+ if (n == 0)
+ return mat;
+
+ ext = isl_mat_alloc(mat->ctx, mat->n_row, mat->n_col + n);
+ if (!ext)
+ goto error;
+
+ isl_mat_sub_copy(mat->ctx, ext->row, mat->row, mat->n_row, 0, 0, col);
+ isl_mat_sub_copy(mat->ctx, ext->row, mat->row, mat->n_row,
+ col + n, col, mat->n_col - col);
+
+ isl_mat_free(mat);
+ return ext;
+error:
+ isl_mat_free(mat);
+ return NULL;
+}
+
void isl_mat_col_submul(struct isl_mat *mat,
int dst_col, isl_int f, int src_col)
{