lib/roken/hstrerror.c

   1 /*
   2  * Copyright (c) 1995 - 1999 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 RCSID("$Id$");
  37 #endif
  38
  39 #ifndef HAVE_HSTRERROR
  40
  41 #if (defined(SunOS) && (SunOS >= 50))
  42 #define hstrerror broken_proto
  43 #endif
  44 #include "roken.h"
  45 #if (defined(SunOS) && (SunOS >= 50))
  46 #undef hstrerror
  47 #endif
  48
  49 #if !(defined(HAVE_H_ERRLIST) && defined(HAVE_H_NERR))
  50 static const char *const h_errlist[] = {
  51     "Resolver Error 0 (no error)",
  52     "Unknown host",             /* 1 HOST_NOT_FOUND */
  53     "Host name lookup failure", /* 2 TRY_AGAIN */
  54     "Unknown server error",     /* 3 NO_RECOVERY */
  55     "No address associated with name", /* 4 NO_ADDRESS */
  56 };
  57
  58 static
  59 const
  60 int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
  61 #else
  62
  63 #if !HAVE_DECL_H_ERRLIST
  64 extern const char *h_errlist[];
  65 extern int h_nerr;
  66 #endif
  67
  68 #endif
  69
  70 const char * ROKEN_LIB_FUNCTION
  71 hstrerror(int herr)
  72 {
  73     if (0 <= herr && herr < h_nerr)
  74         return h_errlist[herr];
  75     else if(herr == -17)
  76         return "unknown error";
  77     else
  78         return "Error number out of range (hstrerror)";
  79 }
  80
  81 #endif