void vi_set_fileops(struct visor *vi, struct vi_fileops *fop);
void vi_set_ttyops(struct visor *vi, struct vi_ttyops *tty);
+void vi_window(struct visor *vi, int xsz, int ysz);
+void vi_redraw(struct visor *vi);
+
/* vi_new_buf creates a new buffer and inserts it in the buffer list. If the
* path pointer is null, the new buffer will be empty, otherwise it's as if it
* was followed by a vi_buf_read call to read a file into the buffer.