Sindbad~EG File Manager

MEXPORT_SYMSOUT int select_term(lterm *t, BIGRECT *r, rectlist *selection_region, lterm *ans);
MEXPORT_SYMSOUT int disjoint(BIGRECT *, BIGRECT *);
MEXPORT_SYMSOUT int lcontainseq(lterm);
MEXPORT_SYMSOUT rectlist *SelectionRegion(lterm lt, BIGRECT *r, BIGRECT *activearea);

#define BROKEN(u)  ((u).linelist && (u).linelist->next)
/* a broken term has a linelist of length at least 2 */