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/* Generic errno.h */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2018 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#ifndef _AC_ERRNO_H
#define _AC_ERRNO_H
#if defined( HAVE_ERRNO_H )
# include <errno.h>
#elif defined( HAVE_SYS_ERRNO_H )
# include <sys/errno.h>
#endif
#ifndef HAVE_SYS_ERRLIST
/* no sys_errlist */
# define sys_nerr 0
# define sys_errlist ((char **)0)
#elif defined( DECL_SYS_ERRLIST )
/* have sys_errlist but need declaration */
LDAP_LIBC_V(int) sys_nerr;
LDAP_LIBC_V(char) *sys_errlist[];
#endif
#undef _AC_ERRNO_UNKNOWN
#define _AC_ERRNO_UNKNOWN "unknown error"
#ifdef HAVE_SYS_ERRLIST
/* this is thread safe */
# define STRERROR(e) ( (e) > -1 && (e) < sys_nerr \
? sys_errlist[(e)] : _AC_ERRNO_UNKNOWN )
#elif defined( HAVE_STRERROR )
/* this may not be thread safe */
/* and, yes, some implementations of strerror may return NULL */
# define STRERROR(e) ( strerror(e) \
? strerror(e) : _AC_ERRNO_UNKNOWN )
#else
/* this is thread safe */
# define STRERROR(e) ( _AC_ERRNO_UNKNOWN )
#endif
#endif /* _AC_ERRNO_H */
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