2006-07-30 Roland McGrath <roland@redhat.com>
[glibc/history.git] / string / xpg-strerror.c
blob5cb56cdfb88128daf050167baa9648619c3952d5
1 /* Copyright (C) 1991, 1993, 1995, 1996, 1997, 1998, 2000, 2002, 2004
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <errno.h>
21 #include <libintl.h>
22 #include <stdio.h>
23 #include <string.h>
24 #include <sys/param.h>
25 #include <stdio-common/_itoa.h>
27 /* It is critical here that we always use the `dcgettext' function for
28 the message translation. Since <libintl.h> only defines the macro
29 `dgettext' to use `dcgettext' for optimizing programs this is not
30 always guaranteed. */
31 #ifndef dgettext
32 # include <locale.h> /* We need LC_MESSAGES. */
33 # define dgettext(domainname, msgid) dcgettext (domainname, msgid, LC_MESSAGES)
34 #endif
36 /* Fill buf with a string describing the errno code in ERRNUM. */
37 int
38 __xpg_strerror_r (int errnum, char *buf, size_t buflen)
40 if (errnum < 0 || errnum >= _sys_nerr_internal
41 || _sys_errlist_internal[errnum] == NULL)
43 __set_errno (EINVAL);
44 return -1;
46 const char *estr = (const char *) _(_sys_errlist_internal[errnum]);
47 size_t estrlen = strlen (estr) + 1;
49 if (buflen < estrlen)
51 __set_errno (ERANGE);
52 return -1;
55 memcpy (buf, estr, estrlen);
56 return 0;