/* strerror-override.h --- POSIX compatible system error routine

   Copyright (C) 2010-2011 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef _GL_STRERROR_OVERRIDE_H
# define _GL_STRERROR_OVERRIDE_H

# include <errno.h>
# include <stddef.h>

/* Reasonable buffer size that should never trigger ERANGE; if this
   proves too small, we intentionally abort(), to remind us to fix
   this value.  */
# define STACKBUF_LEN 256

/* If ERRNUM maps to an errno value defined by gnulib, return a string
   describing the error.  Otherwise return NULL.  */
# if GNULIB_defined_ETXTBSY \
    || GNULIB_defined_ESOCK \
    || GNULIB_defined_ENOMSG \
    || GNULIB_defined_EIDRM \
    || GNULIB_defined_ENOLINK \
    || GNULIB_defined_EPROTO \
    || GNULIB_defined_EMULTIHOP \
    || GNULIB_defined_EBADMSG \
    || GNULIB_defined_EOVERFLOW \
    || GNULIB_defined_ENOTSUP \
    || GNULIB_defined_ESTALE \
    || GNULIB_defined_EDQUOT \
    || GNULIB_defined_ECANCELED
extern const char *strerror_override (int errnum);
# else
#  define strerror_override(ignored) NULL
# endif

#endif /* _GL_STRERROR_OVERRIDE_H */