126 	struct eqn_node	*eqn; /* active equation parser */  member
745 	r->last_eqn = r->eqn = NULL;  in roff_free1()
1105 	eqn_box_free(n->eqn);  in roff_node_free()
1837 	if (len > 80 && r->tbl == NULL && r->eqn == NULL &&  in roff_parseln()
1849 	    (r->eqn == NULL || r->eqn_inline)) {  in roff_parseln()
1881 	if (r->eqn != NULL && strncmp(buf->buf + ppos, ".EN", 3)) {  in roff_parseln()
1882 		eqn_read(r->eqn, buf->buf + ppos);  in roff_parseln()
1987 	if (r->eqn != NULL) {  in roff_endparse()
1989 		    r->eqn->node->line, r->eqn->node->pos, "EQ");  in roff_endparse()
1990 		eqn_parse(r->eqn);  in roff_endparse()
1991 		r->eqn = NULL;  in roff_endparse()
3367 	cp2 = strchr(cp1, r->eqn == NULL ?  in roff_eqndelim()
3378 		if (r->eqn == NULL)  in roff_eqndelim()
3388 	if (r->eqn == NULL) {  in roff_eqndelim()
3399 		if (r->eqn != NULL)  in roff_eqndelim()
3412 	r->eqn_inline = r->eqn == NULL;  in roff_eqndelim()
3426 	n->eqn = eqn_box_new();  in roff_EQ()
3430 	assert(r->eqn == NULL);  in roff_EQ()
3435 	r->eqn = r->last_eqn;  in roff_EQ()
3436 	r->eqn->node = n;  in roff_EQ()
3448 	if (r->eqn != NULL) {  in roff_EN()
3449 		eqn_parse(r->eqn);  in roff_EN()
3450 		r->eqn = NULL;  in roff_EN()