1 #include <u.h>
2 #include <libc.h>
3 #include <venti.h>
4
5 int
vtputstring(Packet * p,char * s)6 vtputstring(Packet *p, char *s)
7 {
8 uchar buf[2];
9 int n;
10
11 if(s == nil){
12 werrstr("null string in packet");
13 return -1;
14 }
15 n = strlen(s);
16 if(n > VtMaxStringSize){
17 werrstr("string too long in packet");
18 return -1;
19 }
20 buf[0] = n>>8;
21 buf[1] = n;
22 packetappend(p, buf, 2);
23 packetappend(p, (uchar*)s, n);
24 return 0;
25 }
26
27 int
vtgetstring(Packet * p,char ** ps)28 vtgetstring(Packet *p, char **ps)
29 {
30 uchar buf[2];
31 int n;
32 char *s;
33
34 if(packetconsume(p, buf, 2) < 0)
35 return -1;
36 n = (buf[0]<<8) + buf[1];
37 if(n > VtMaxStringSize) {
38 werrstr("string too long in packet");
39 return -1;
40 }
41 s = vtmalloc(n+1);
42 if(packetconsume(p, (uchar*)s, n) < 0){
43 vtfree(s);
44 return -1;
45 }
46 s[n] = 0;
47 *ps = s;
48 return 0;
49 }
50
51