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