src/libs/libgroff/strerror.c

   1 /* Copyright (C) 1989, 1990, 1991, 1992, 2001, 2003
   2    Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24
  25 #include <stdio.h>
  26 #include <errno.h>
  27 #include <stdlib.h>             /* for MinGW */
  28
  29 #define INT_DIGITS 19           /* enough for 64 bit integer */
  30
  31 #ifndef HAVE_SYS_NERR
  32 extern int sys_nerr;
  33 #endif
  34 #ifndef HAVE_SYS_ERRLIST
  35 extern char *sys_errlist[];
  36 #endif
  37
  38 char *strerror(n)
  39      int n;
  40 {
  41   static char buf[sizeof("Error ") + 1 + INT_DIGITS];
  42   if (n >= 0 && n < sys_nerr && sys_errlist[n] != 0)
  43     return sys_errlist[n];
  44   else {
  45     sprintf(buf, "Error %d", n);
  46     return buf;
  47   }
  48 }