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 #include <config.h>
  35
  36 #ifndef HAVE_HSTRERROR
  37
  38 #if (defined(SunOS) && (SunOS >= 50))
  39 #define hstrerror broken_proto
  40 #endif
  41 #include "roken.h"
  42 #if (defined(SunOS) && (SunOS >= 50))
  43 #undef hstrerror
  44 #endif
  45
  46 #if !(defined(HAVE_H_ERRLIST) && defined(HAVE_H_NERR))
  47 static const char *const h_errlist[] = {
  48     "Resolver Error 0 (no error)",
  49     "Unknown host",             /* 1 HOST_NOT_FOUND */
  50     "Host name lookup failure", /* 2 TRY_AGAIN */
  51     "Unknown server error",     /* 3 NO_RECOVERY */
  52     "No address associated with name", /* 4 NO_ADDRESS */
  53 };
  54
  55 static
  56 const
  57 int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
  58 #else
  59
  60 #if !HAVE_DECL_H_ERRLIST
  61 extern const char *h_errlist[];
  62 extern int h_nerr;
  63 #endif
  64
  65 #endif
  66
  67 const char * ROKEN_LIB_FUNCTION
  68 hstrerror(int herr)
  69 {
  70     if (0 <= herr && herr < h_nerr)
  71         return h_errlist[herr];
  72     else if(herr == -17)
  73         return "unknown error";
  74     else
  75         return "Error number out of range (hstrerror)";
  76 }
  77
  78 #endif