blob: 5312929c6fd6bf74af48571761e6b5187103a314 (
plain)
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
|
/* $OpenBSD: a64l.c,v 1.5 2005/08/08 08:05:36 espie Exp $ */
/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#include <errno.h>
#include <stdlib.h>
long
a64l(const char *s)
{
long value, digit, shift;
int i;
if (s == NULL) {
errno = EINVAL;
return(-1L);
}
value = 0;
shift = 0;
for (i = 0; *s && i < 6; i++, s++) {
if (*s >= '.' && *s <= '/')
digit = *s - '.';
else if (*s >= '0' && *s <= '9')
digit = *s - '0' + 2;
else if (*s >= 'A' && *s <= 'Z')
digit = *s - 'A' + 12;
else if (*s >= 'a' && *s <= 'z')
digit = *s - 'a' + 38;
else {
errno = EINVAL;
return(-1L);
}
value |= digit << shift;
shift += 6;
}
return(value);
}
|
