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/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: a64l.c,v 1.4 2005/03/30 18:51:49 pat Exp $";
#endif /* LIBC_SCCS and not lint */
#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);
}
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