1  /* Copyright (C) 1997-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3     Contributed by Philip Blundell <pjb27@cam.ac.uk>, 1997.
       4  
       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.
       9  
      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.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <libintl.h>
      20  #include <netdb.h>
      21  #include <stdint.h>
      22  #include <stdio.h>
      23  
      24  
      25  #define MSGSTRFIELD(line) MSGSTRFIELD1 (line)
      26  #define MSGSTRFIELD1(line) str##line
      27  static const union msgstr_t
      28  {
      29    struct
      30    {
      31  #define _S(n, s) char MSGSTRFIELD(__LINE__)[sizeof (s)];
      32  #include "gai_strerror-strs.h"
      33  #undef _S
      34    };
      35    char str[0];
      36  } msgstr =
      37    {
      38      {
      39  #define _S(n, s) s,
      40  #include "gai_strerror-strs.h"
      41  #undef _S
      42      }
      43    };
      44  static const struct
      45  {
      46    int16_t code;
      47    uint16_t idx;
      48  } msgidx[] =
      49    {
      50  #define _S(n, s) { n, offsetof (union msgstr_t, MSGSTRFIELD (__LINE__)) },
      51  #include "gai_strerror-strs.h"
      52  #undef _S
      53    };
      54  
      55  
      56  const char *
      57  gai_strerror (int code)
      58  {
      59    const char *result = "Unknown error";
      60    for (size_t i = 0; i < sizeof (msgidx) / sizeof (msgidx[0]); ++i)
      61      if (msgidx[i].code == code)
      62        {
      63  	result = msgstr.str + msgidx[i].idx;
      64  	break;
      65        }
      66  
      67    return _(result);
      68  }
      69  libc_hidden_def (gai_strerror)