#include	<u.h>#include	<libc.h>#include	<bio.h> intBflush(Biobufhdr *bp){	int n, c; 	switch(bp->state) {	case Bwactive:		n = bp->bsize+bp->ocount;		if(n == 0)			return 0;		c = write(bp->fid, bp->bbuf, n);		if(n == c) {			bp->offset += n;			bp->ocount = -bp->bsize;			return 0;		}		bp->state = Binactive;		bp->ocount = 0;		break; 	case Bracteof:		bp->state = Bractive; 	case Bractive:		bp->icount = 0;		bp->gbuf = bp->ebuf;		return 0;	}	return Beof;}