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
|
#ifndef UTIL_H
#define UTIL_H
static int hex_to_int(char c)
{
if ('0' <= c && c <= '9')
return c - '0';
else if ('a' <= c && c <= 'f')
return c - 'a' + 10;
else if ('A' <= c && c <= 'F')
return c - 'A' + 10;
else
return -1;
}
static int of_hex(unsigned char *dst, const char *src, int n)
{
int i;
if (n % 2 != 0)
return -1;
for (i = 0; i < n/2; i++) {
int a, b;
a = hex_to_int(src[i*2]);
if(a < 0)
return -1;
b = hex_to_int(src[i*2 + 1]);
if(b < 0)
return -1;
dst[i] = a*16 + b;
}
return n/2;
}
#endif
|
