blob: 6717292771595c1844d53ac6f81e61c23095859d [file] [log] [blame]
Paul Bakker367dae42009-06-28 21:50:27 +00001int unhexify(unsigned char *obuf, const char *ibuf)
2{
3 unsigned char c, c2;
4 int len = strlen(ibuf) / 2;
5 assert(!(strlen(ibuf) %1)); // must be even number of bytes
6
7 while (*ibuf != 0)
8 {
9 c = *ibuf++;
10 if( c >= '0' && c <= '9' )
11 c -= '0';
12 else if( c >= 'a' && c <= 'f' )
13 c -= 'a' - 10;
14 else if( c >= 'A' && c <= 'F' )
15 c -= 'A' - 10;
16 else
17 assert( 0 );
18
19 c2 = *ibuf++;
20 if( c2 >= '0' && c2 <= '9' )
21 c2 -= '0';
22 else if( c2 >= 'a' && c2 <= 'f' )
23 c2 -= 'a' - 10;
24 else if( c2 >= 'A' && c2 <= 'F' )
25 c2 -= 'A' - 10;
26 else
27 assert( 0 );
28
29 *obuf++ = ( c << 4 ) | c2;
30 }
31
32 return len;
33}
34
35void hexify(unsigned char *obuf, const unsigned char *ibuf, int len)
36{
37 unsigned char l, h;
38
39 while (len != 0)
40 {
41 h = (*ibuf) / 16;
42 l = (*ibuf) % 16;
43
44 if( h < 10 )
45 *obuf++ = '0' + h;
46 else
47 *obuf++ = 'a' + h - 10;
48
49 if( l < 10 )
50 *obuf++ = '0' + l;
51 else
52 *obuf++ = 'a' + l - 10;
53
54 ++ibuf;
55 len--;
56 }
57}