1 d3df3087 2003-12-06 devnull /* Mostly copied from Plan 9's libc. */
  2 d3df3087 2003-12-06 devnull 
  3 d3df3087 2003-12-06 devnull #include <u.h>
  4 d3df3087 2003-12-06 devnull #include <libc.h>
  5 d3df3087 2003-12-06 devnull #include <fcall.h>
  6 d3df3087 2003-12-06 devnull #include <fs.h>
  7 d3df3087 2003-12-06 devnull 
  8 d3df3087 2003-12-06 devnull static
  9 d3df3087 2003-12-06 devnull long
 10 d3df3087 2003-12-06 devnull dirpackage(uchar *buf, long ts, Dir **d)
 11 d3df3087 2003-12-06 devnull {
 12 d3df3087 2003-12-06 devnull 	char *s;
 13 d3df3087 2003-12-06 devnull 	long ss, i, n, nn, m;
 14 d3df3087 2003-12-06 devnull 
 15 d3df3087 2003-12-06 devnull 	*d = nil;
 16 d3df3087 2003-12-06 devnull 	if(ts <= 0)
 17 d3df3087 2003-12-06 devnull 		return 0;
 18 d3df3087 2003-12-06 devnull 
 19 d3df3087 2003-12-06 devnull 	/*
 20 d3df3087 2003-12-06 devnull 	 * first find number of all stats, check they look like stats, & size all associated strings
 21 d3df3087 2003-12-06 devnull 	 */
 22 d3df3087 2003-12-06 devnull 	ss = 0;
 23 d3df3087 2003-12-06 devnull 	n = 0;
 24 d3df3087 2003-12-06 devnull 	for(i = 0; i < ts; i += m){
 25 d3df3087 2003-12-06 devnull 		m = BIT16SZ + GBIT16(&buf[i]);
 26 d3df3087 2003-12-06 devnull 		if(statcheck(&buf[i], m) < 0)
 27 d3df3087 2003-12-06 devnull 			break;
 28 d3df3087 2003-12-06 devnull 		ss += m;
 29 d3df3087 2003-12-06 devnull 		n++;
 30 d3df3087 2003-12-06 devnull 	}
 31 d3df3087 2003-12-06 devnull 
 32 d3df3087 2003-12-06 devnull 	if(i != ts)
 33 d3df3087 2003-12-06 devnull 		return -1;
 34 d3df3087 2003-12-06 devnull 
 35 d3df3087 2003-12-06 devnull 	*d = malloc(n * sizeof(Dir) + ss);
 36 d3df3087 2003-12-06 devnull 	if(*d == nil)
 37 d3df3087 2003-12-06 devnull 		return -1;
 38 d3df3087 2003-12-06 devnull 
 39 d3df3087 2003-12-06 devnull 	/*
 40 d3df3087 2003-12-06 devnull 	 * then convert all buffers
 41 d3df3087 2003-12-06 devnull 	 */
 42 d3df3087 2003-12-06 devnull 	s = (char*)*d + n * sizeof(Dir);
 43 d3df3087 2003-12-06 devnull 	nn = 0;
 44 d3df3087 2003-12-06 devnull 	for(i = 0; i < ts; i += m){
 45 d3df3087 2003-12-06 devnull 		m = BIT16SZ + GBIT16((uchar*)&buf[i]);
 46 d3df3087 2003-12-06 devnull 		if(nn >= n || convM2D(&buf[i], m, *d + nn, s) != m){
 47 d3df3087 2003-12-06 devnull 			free(*d);
 48 d3df3087 2003-12-06 devnull 			*d = nil;
 49 d3df3087 2003-12-06 devnull 			return -1;
 50 d3df3087 2003-12-06 devnull 		}
 51 d3df3087 2003-12-06 devnull 		nn++;
 52 d3df3087 2003-12-06 devnull 		s += m;
 53 d3df3087 2003-12-06 devnull 	}
 54 d3df3087 2003-12-06 devnull 
 55 d3df3087 2003-12-06 devnull 	return nn;
 56 d3df3087 2003-12-06 devnull }
 57 d3df3087 2003-12-06 devnull 
 58 d3df3087 2003-12-06 devnull long
 59 d3df3087 2003-12-06 devnull fsdirread(Fid *fid, Dir **d)
 60 d3df3087 2003-12-06 devnull {
 61 d3df3087 2003-12-06 devnull 	uchar *buf;
 62 d3df3087 2003-12-06 devnull 	long ts;
 63 d3df3087 2003-12-06 devnull 
 64 d3df3087 2003-12-06 devnull 	buf = malloc(DIRMAX);
 65 d3df3087 2003-12-06 devnull 	if(buf == nil)
 66 d3df3087 2003-12-06 devnull 		return -1;
 67 d3df3087 2003-12-06 devnull 	ts = fsread(fid, buf, DIRMAX);
 68 d3df3087 2003-12-06 devnull 	if(ts >= 0)
 69 d3df3087 2003-12-06 devnull 		ts = dirpackage(buf, ts, d);
 70 d3df3087 2003-12-06 devnull 	free(buf);
 71 d3df3087 2003-12-06 devnull 	return ts;
 72 d3df3087 2003-12-06 devnull }
 73 d3df3087 2003-12-06 devnull 
 74 d3df3087 2003-12-06 devnull long
 75 d3df3087 2003-12-06 devnull fsdirreadall(Fid *fid, Dir **d)
 76 d3df3087 2003-12-06 devnull {
 77 d3df3087 2003-12-06 devnull 	uchar *buf, *nbuf;
 78 d3df3087 2003-12-06 devnull 	long n, ts;
 79 d3df3087 2003-12-06 devnull 
 80 d3df3087 2003-12-06 devnull 	buf = nil;
 81 d3df3087 2003-12-06 devnull 	ts = 0;
 82 d3df3087 2003-12-06 devnull 	for(;;){
 83 d3df3087 2003-12-06 devnull 		nbuf = realloc(buf, ts+DIRMAX);
 84 d3df3087 2003-12-06 devnull 		if(nbuf == nil){
 85 d3df3087 2003-12-06 devnull 			free(buf);
 86 d3df3087 2003-12-06 devnull 			return -1;
 87 d3df3087 2003-12-06 devnull 		}
 88 d3df3087 2003-12-06 devnull 		buf = nbuf;
 89 d3df3087 2003-12-06 devnull 		n = fsread(fid, buf+ts, DIRMAX);
 90 d3df3087 2003-12-06 devnull 		if(n <= 0)
 91 d3df3087 2003-12-06 devnull 			break;
 92 d3df3087 2003-12-06 devnull 		ts += n;
 93 d3df3087 2003-12-06 devnull 	}
 94 d3df3087 2003-12-06 devnull 	if(ts >= 0)
 95 d3df3087 2003-12-06 devnull 		ts = dirpackage(buf, ts, d);
 96 d3df3087 2003-12-06 devnull 	free(buf);
 97 d3df3087 2003-12-06 devnull 	if(ts == 0 && n < 0)
 98 d3df3087 2003-12-06 devnull 		return -1;
 99 d3df3087 2003-12-06 devnull 	return ts;
100 d3df3087 2003-12-06 devnull }