#include <u.h>#include <libc.h>#include <libg.h>#include <frame.h> voidfrinit(Frame *f, Rectangle r, Font *ft, Bitmap *b){	f->font = ft;	f->maxtab = 8*charwidth(ft, '0');	f->nbox = 0;	f->nalloc = 0;	f->nchars = 0;	f->nlines = 0;	f->p0 = 0;	f->p1 = 0;	f->box = 0;	f->lastlinefull = 0;	frsetrects(f, r, b);} voidfrsetrects(Frame *f, Rectangle r, Bitmap *b){	f->b = b;	f->entire = r;	f->r = r;	f->r.max.y -= (r.max.y-r.min.y)%f->font->height;	f->left = r.min.x+1;	f->maxlines = (r.max.y-r.min.y)/f->font->height;} voidfrclear(Frame *f){	if(f->nbox)		_frdelbox(f, 0, f->nbox-1);	if(f->box)		free(f->box);	f->box = 0;}