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annotate lib/strerror.c @ 8623:27cfd50b8f6c

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Fix missing escape.
author Bruno Haible <bruno@clisp.org>
date Tue, 03 Apr 2007 22:45:13 +0000
parents 3e28c7035f38
children 404ee875898f
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1 /* strerror.c --- ANSI C compatible system error routine
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2
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3 Copyright (C) 1986, 1988, 1989, 1991, 2002, 2003, 2006, 2007 Free
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4 Software Foundation, Inc.
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5
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software Foundation,
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18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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19
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20 #include <config.h>
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21
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22 #if !HAVE_STRERROR
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23
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24 #include <limits.h>
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26 /* Don't include <stdio.h>, since it may or may not declare
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27 sys_errlist and its declarations may collide with ours. Just
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28 declare the stuff that we need directly. Standard hosted C89
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29 implementations define strerror and they don't need this strerror
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30 function, so take some liberties with the standard to cater to
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31 ancient or limited freestanding implementations. */
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32 int sprintf (char *, char const *, ...);
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33 extern int sys_nerr;
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34 extern char *sys_errlist[];
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35
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36 char *
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37 strerror (int n)
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38 {
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39 static char const fmt[] = "Unknown error (%d)";
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40 static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3];
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41
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42 if (n < 0 || n >= sys_nerr)
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43 {
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44 sprintf (mesg, fmt, n);
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45 return mesg;
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46 }
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47 else
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48 return sys_errlist[n];
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49 }
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50
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51 #else
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52
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53 /* This declaration is solely to ensure that after preprocessing
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54 this file is never empty. */
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55 typedef int dummy;
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56
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57 #endif