/*-
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Public domain.
 */

#if 0
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: a64l.c,v 1.8 2000/01/22 22:19:19 mycroft Exp $");
#endif /* not lint */
#endif

#include <sys/cdefs.h>
#include <stdlib.h>
#include <inttypes.h>

#define ADOT    46              /* ASCII '.' */
#define ASLASH  47              /* ASCII '/' */
#define A0      48              /* ASCII '0' */
#define AA      65              /* ASCII 'A' */
#define Aa      97              /* ASCII 'a' */

long
a64l(const char *s)
{
        long shift;
        int digit, i, value;

        value = 0;
        shift = 0;
        for (i = 0; *s != '\0' && i < 6; i++, s++) {
                if (*s <= ASLASH)
                        digit = *s - ASLASH + 1;
                else if (*s <= A0 + 9)
                        digit = *s - A0 + 2;
                else if (*s <= AA + 25)
                        digit = *s - AA + 12;
                else
                        digit = *s - Aa + 38;

                value |= digit << shift;
                shift += 6;
        }
        return (value);
}