1 |
pippijn |
1.1 |
/* |
2 |
|
|
* ubase64.C: ircu base64 routines. |
3 |
|
|
* Rights to this code are documented in doc/LICENSE. |
4 |
|
|
* |
5 |
|
|
* Copyright © 2005-2007 Atheme Project (http://www.atheme.org) |
6 |
|
|
*/ |
7 |
|
|
|
8 |
|
|
static char const rcsid[] = "$Id"; |
9 |
|
|
|
10 |
|
|
#include "atheme.h" |
11 |
|
|
|
12 |
|
|
/* |
13 |
|
|
* base64touint() written 01/20/06 by jilles, for getting IP addresses. |
14 |
|
|
*/ |
15 |
|
|
|
16 |
|
|
static const char ub64_alphabet[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789[]"; |
17 |
|
|
#define __ '\377' |
18 |
|
|
static const char ub64_lookuptab[256] = { |
19 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 0-15 */ |
20 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 16-31 */ |
21 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 32-47 */ |
22 |
|
|
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, __, __, __, __, __, __, /* 48-63 */ |
23 |
|
|
__, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 64-79 */ |
24 |
|
|
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 62, __, 63, __, __, /* 80-95 */ |
25 |
|
|
__, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 96-111 */ |
26 |
|
|
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, __, __, __, __, __, /* 112-127 */ |
27 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, |
28 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, |
29 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, |
30 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, |
31 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, |
32 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, |
33 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, |
34 |
|
|
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ |
35 |
|
|
}; |
36 |
|
|
|
37 |
|
|
#undef __ |
38 |
|
|
|
39 |
|
|
const char * |
40 |
|
|
uinttobase64 (char *buf, uint64_t v, int64_t count) |
41 |
|
|
{ |
42 |
|
|
buf[count] = '\0'; |
43 |
|
|
|
44 |
|
|
while (count >= 0) |
45 |
|
|
{ |
46 |
|
|
buf[--count] = ub64_alphabet[v & 63]; |
47 |
|
|
v >>= 6; |
48 |
|
|
} |
49 |
|
|
|
50 |
|
|
return buf; |
51 |
|
|
} |
52 |
|
|
|
53 |
|
|
unsigned int |
54 |
|
|
base64touint (char *buf) |
55 |
|
|
{ |
56 |
|
|
int bits; |
57 |
|
|
unsigned int v = 0; |
58 |
|
|
int count = 6; |
59 |
|
|
|
60 |
|
|
while (--count >= 0 && (bits = ub64_lookuptab[255 & *buf++]) != '\377') |
61 |
|
|
v = v << 6 | bits; |
62 |
|
|
return v; |
63 |
|
|
} |
64 |
|
|
|
65 |
|
|
/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs |
66 |
|
|
* vim:ts=8 |
67 |
|
|
* vim:sw=8 |
68 |
|
|
* vim:noexpandtab |
69 |
|
|
*/ |