encodefmt.c - 9base - revived minimalist port of Plan 9 userland to Unix | |
git clone git://git.suckless.org/9base | |
Log | |
Files | |
Refs | |
README | |
LICENSE | |
--- | |
encodefmt.c (1072B) | |
--- | |
1 #include <lib9.h> | |
2 | |
3 int | |
4 encodefmt(Fmt *f) | |
5 { | |
6 char *out; | |
7 char *buf, *p; | |
8 int len; | |
9 int ilen; | |
10 int rv; | |
11 uchar *b; | |
12 char obuf[64]; /* rsc optimization */ | |
13 | |
14 b = va_arg(f->args, uchar*); | |
15 if(b == 0) | |
16 return fmtstrcpy(f, "<nil>"); | |
17 | |
18 ilen = f->prec; | |
19 f->prec = 0; | |
20 | |
21 if(!(f->flags&FmtPrec) || ilen < 0) | |
22 goto error; | |
23 | |
24 f->flags &= ~FmtPrec; | |
25 | |
26 switch(f->r){ | |
27 case '<': | |
28 len = (8*ilen+4)/5 + 3; | |
29 break; | |
30 case '[': | |
31 len = (8*ilen+5)/6 + 4; | |
32 break; | |
33 case 'H': | |
34 len = 2*ilen + 1; | |
35 break; | |
36 default: | |
37 goto error; | |
38 } | |
39 | |
40 if(len > sizeof(obuf)){ | |
41 buf = malloc(len); | |
42 if(buf == nil) | |
43 goto error; | |
44 } else | |
45 buf = obuf; | |
46 | |
47 /* convert */ | |
48 out = buf; | |
49 switch(f->r){ | |
50 case '<': | |
51 rv = enc32(out, len, b, ilen); | |
52 break; | |
53 case '[': | |
54 rv = enc64(out, len, b, ilen); | |
55 break; | |
56 case 'H': | |
57 rv = enc16(out, len, b, ilen); | |
58 if(rv >= 0 && (f->flags & FmtLong)) | |
59 for(p = buf; *p; p++) | |
60 *p = tolower((uchar)*p); | |
61 break; | |
62 default: | |
63 rv = -1; | |
64 break; | |
65 } | |
66 if(rv < 0) | |
67 goto error; | |
68 | |
69 fmtstrcpy(f, buf); | |
70 if(buf != obuf) | |
71 free(buf); | |
72 return 0; | |
73 | |
74 error: | |
75 return fmtstrcpy(f, "<encodefmt>"); | |
76 } |