#include	<u.h>#include	<libc.h>#include	<bio.h> static intfmtBflush(Fmt *f){	Biobufhdr *bp; 	bp = f->farg;	bp->ocount = (char*)f->to - (char*)f->stop;	if(Bflush(bp) < 0)		return 0;	f->stop = bp->ebuf;	f->to = (char*)f->stop + bp->ocount;	f->start = f->to;	return 1;} intBvprint(Biobufhdr *bp, char *fmt, va_list arg){	int n;	Fmt f; 	f.runes = 0;	f.stop = bp->ebuf;	f.start = (char*)f.stop + bp->ocount;	f.to = f.start;	f.flush = fmtBflush;	f.farg = bp;	f.nfmt = 0;	f.args = arg;	n = dofmt(&f, fmt);	bp->ocount = (char*)f.to - (char*)f.stop;	return n;}