/* Mostly copied from Plan 9's libc. */ #include <u.h>#include <libc.h>#include <fcall.h>#include <9pclient.h>#include "fsimpl.h" static longdirpackage(uchar *buf, long ts, Dir **d, int dotu){	char *s;	long ss, i, n, nn, m; 	*d = nil;	if(ts <= 0)		return 0; 	/*	 * first find number of all stats, check they look like stats, & size all associated strings	 */	ss = 0;	n = 0;	for(i = 0; i < ts; i += m){		m = BIT16SZ + GBIT16(&buf[i]);		if(statchecku(&buf[i], m, dotu) < 0)			break;		ss += m;		n++;	} 	if(i != ts)		return -1; 	*d = malloc(n * sizeof(Dir) + ss);	if(*d == nil)		return -1; 	/*	 * then convert all buffers	 */	s = (char*)*d + n * sizeof(Dir);	nn = 0;	for(i = 0; i < ts; i += m){		m = BIT16SZ + GBIT16((uchar*)&buf[i]);		if(nn >= n || convM2Du(&buf[i], m, *d + nn, s, dotu) != m){			free(*d);			*d = nil;			return -1;		}		nn++;		s += m;	} 	return nn;} longfsdirread(CFid *fid, Dir **d){	uchar *buf;	long ts; 	buf = malloc(DIRMAX);	if(buf == nil)		return -1;	ts = fsread(fid, buf, DIRMAX);	if(ts >= 0)		ts = dirpackage(buf, ts, d, fid->fs->dotu);	free(buf);	return ts;} longfsdirreadall(CFid *fid, Dir **d){	uchar *buf, *nbuf;	long n, ts; 	buf = nil;	ts = 0;	for(;;){		nbuf = realloc(buf, ts+DIRMAX);		if(nbuf == nil){			free(buf);			return -1;		}		buf = nbuf;		n = fsread(fid, buf+ts, DIRMAX);		if(n <= 0)			break;		ts += n;	}	if(ts >= 0){		ts = dirpackage(buf, ts, d, fid->fs->dotu);		if(ts < 0)			werrstr("malformed directory contents [dotu=%d]", fid->fs->dotu);	}	free(buf);	if(ts == 0 && n < 0)		return -1;	return ts;}