1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
#include <lib9.h>
int
encodefmt(Fmt *f)
{
char *out;
char *buf, *p;
int len;
int ilen;
int rv;
uchar *b;
char obuf[64]; /* rsc optimization */
b = va_arg(f->args, uchar*);
if(b == 0)
return fmtstrcpy(f, "<nil>");
ilen = f->prec;
f->prec = 0;
if(!(f->flags&FmtPrec) || ilen < 0)
goto error;
f->flags &= ~FmtPrec;
switch(f->r){
case '<':
len = (8*ilen+4)/5 + 3;
break;
case '[':
len = (8*ilen+5)/6 + 4;
break;
case 'H':
len = 2*ilen + 1;
break;
default:
goto error;
}
if(len > sizeof(obuf)){
buf = malloc(len);
if(buf == nil)
goto error;
} else
buf = obuf;
/* convert */
out = buf;
switch(f->r){
case '<':
rv = enc32(out, len, b, ilen);
break;
case '[':
rv = enc64(out, len, b, ilen);
break;
case 'H':
rv = enc16(out, len, b, ilen);
if(rv >= 0 && (f->flags & FmtLong))
for(p = buf; *p; p++)
*p = tolower((uchar)*p);
break;
default:
rv = -1;
break;
}
if(rv < 0)
goto error;
fmtstrcpy(f, buf);
if(buf != obuf)
free(buf);
return 0;
error:
return fmtstrcpy(f, "<encodefmt>");
}
|