1/*-
2 * Written by J.T. Conklin <jtc@netbsd.org>.
3 * Public domain.
4 */
5
6#if 0
7#if defined(LIBC_SCCS) && !defined(lint)
8__RCSID("$NetBSD: a64l.c,v 1.8 2000/01/22 22:19:19 mycroft Exp $");
9#endif /* not lint */
10#endif
11
12#include <sys/cdefs.h>
13__FBSDID("$FreeBSD$");
14
15#include <stdlib.h>
16#include <inttypes.h>
17
18#define	ADOT	46		/* ASCII '.' */
19#define	ASLASH	47		/* ASCII '/' */
20#define	A0	48		/* ASCII '0' */
21#define	AA	65		/* ASCII 'A' */
22#define	Aa	97		/* ASCII 'a' */
23
24long
25a64l(const char *s)
26{
27	long shift;
28	int digit, i, value;
29
30	value = 0;
31	shift = 0;
32	for (i = 0; *s != '\0' && i < 6; i++, s++) {
33		if (*s <= ASLASH)
34			digit = *s - ASLASH + 1;
35		else if (*s <= A0 + 9)
36			digit = *s - A0 + 2;
37		else if (*s <= AA + 25)
38			digit = *s - AA + 12;
39		else
40			digit = *s - Aa + 38;
41
42		value |= digit << shift;
43		shift += 6;
44	}
45	return (value);
46}
47