1 #include <u.h>
2 #include <libc.h>
3 #include <fcall.h>
4
5 uint
sizeD2M(Dir * d)6 sizeD2M(Dir *d)
7 {
8 char *sv[4];
9 int i, ns;
10
11 sv[0] = d->name;
12 sv[1] = d->uid;
13 sv[2] = d->gid;
14 sv[3] = d->muid;
15
16 ns = 0;
17 for(i = 0; i < 4; i++)
18 if(sv[i])
19 ns += strlen(sv[i]);
20
21 return STATFIXLEN + ns;
22 }
23
24 uint
convD2M(Dir * d,uchar * buf,uint nbuf)25 convD2M(Dir *d, uchar *buf, uint nbuf)
26 {
27 uchar *p, *ebuf;
28 char *sv[4];
29 int i, ns, nsv[4], ss;
30
31 if(nbuf < BIT16SZ)
32 return 0;
33
34 p = buf;
35 ebuf = buf + nbuf;
36
37 sv[0] = d->name;
38 sv[1] = d->uid;
39 sv[2] = d->gid;
40 sv[3] = d->muid;
41
42 ns = 0;
43 for(i = 0; i < 4; i++){
44 if(sv[i])
45 nsv[i] = strlen(sv[i]);
46 else
47 nsv[i] = 0;
48 ns += nsv[i];
49 }
50
51 ss = STATFIXLEN + ns;
52
53 /* set size befor erroring, so user can know how much is needed */
54 /* note that length excludes count field itself */
55 PBIT16(p, ss-BIT16SZ);
56 p += BIT16SZ;
57
58 if(ss > nbuf)
59 return BIT16SZ;
60
61 PBIT16(p, d->type);
62 p += BIT16SZ;
63 PBIT32(p, d->dev);
64 p += BIT32SZ;
65 PBIT8(p, d->qid.type);
66 p += BIT8SZ;
67 PBIT32(p, d->qid.vers);
68 p += BIT32SZ;
69 PBIT64(p, d->qid.path);
70 p += BIT64SZ;
71 PBIT32(p, d->mode);
72 p += BIT32SZ;
73 PBIT32(p, d->atime);
74 p += BIT32SZ;
75 PBIT32(p, d->mtime);
76 p += BIT32SZ;
77 PBIT64(p, d->length);
78 p += BIT64SZ;
79
80 for(i = 0; i < 4; i++){
81 ns = nsv[i];
82 if(p + ns + BIT16SZ > ebuf)
83 return 0;
84 PBIT16(p, ns);
85 p += BIT16SZ;
86 if(ns)
87 memmove(p, sv[i], ns);
88 p += ns;
89 }
90
91 if(ss != p - buf)
92 return 0;
93
94 return p - buf;
95 }
96