/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <fcall.h> staticlongdirpackage(uchar *buf, long ts, Dir **d){	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(statcheck(&buf[i], m) < 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 || convM2D(&buf[i], m, *d + nn, s) != m){			free(*d);			*d = nil;			return -1;		}		nn++;		s += m;	} 	return nn;} longdirread(int fd, Dir **d){	uchar *buf;	long ts; 	buf = malloc(DIRMAX);	if(buf == nil)		return -1;	ts = read(fd, buf, DIRMAX);	if(ts >= 0)		ts = dirpackage(buf, ts, d);	free(buf);	return ts;} longdirreadall(int fd, 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 = read(fd, buf+ts, DIRMAX);		if(n <= 0)			break;		ts += n;	}	if(ts >= 0)		ts = dirpackage(buf, ts, d);	free(buf);	if(ts == 0 && n < 0)		return -1;	return ts;}