/* strerror.c --- ANSI C compatible system error routine
Copyright (C) 1986, 1988-1989, 1991, 2002-2003, 2005 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 2, 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, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if !HAVE_STRERROR
#include <limits.h>
/* Don't include <stdio.h>, since it may or may not declare
sys_errlist and its declarations may collide with ours. Just
declare the stuff that we need directly. Standard hosted C89
implementations define strerror and they don't need this strerror
function, so take some liberties with the standard to cater to
ancient or limited freestanding implementations. */
int sprintf (char *, char const *, ...);
extern int sys_nerr;
extern char *sys_errlist[];
char *
strerror (int n)
{
static char const fmt[] = "Unknown error (%d)";
static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3];
if (n < 0 || n >= sys_nerr)
{
sprintf (mesg, fmt, n);
return mesg;
}
else
return sys_errlist[n];
}
#else
/* This declaration is solely to ensure that after preprocessing
this file is never empty. */
typedef int dummy;
#endif
