64 lines
1.0 KiB
C
64 lines
1.0 KiB
C
/* $NetBSD: l64a.c,v 1.14 2012/03/13 21:13:48 christos 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 <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: l64a.c,v 1.14 2012/03/13 21:13:48 christos Exp $");
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#endif
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#include "namespace.h"
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#ifdef __weak_alias
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__weak_alias(l64a,_l64a)
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__weak_alias(l64a_r,_l64a_r)
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#endif
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char *
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l64a(long value)
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{
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static char buf[8];
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(void)l64a_r(value, buf, (int)sizeof (buf));
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return buf;
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}
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int
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l64a_r(long value, char *buffer, int buflen)
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{
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char *s = buffer;
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int digit;
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unsigned long v = value;
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_DIAGASSERT(buffer != NULL);
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if (value == 0UL)
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goto out;
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for (; v != 0 && buflen > 1; s++, buflen--) {
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digit = (int)(v & 0x3f);
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if (digit < 2)
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*s = digit + '.';
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else if (digit < 12)
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*s = digit + '0' - 2;
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else if (digit < 38)
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*s = digit + 'A' - 12;
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else
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*s = digit + 'a' - 38;
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v >>= 6;
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}
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out:
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*s = '\0';
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return (v == 0UL ? 0 : -1);
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}
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