kc3-lang/gnulib/lib/gai_strerror.c

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• Hash : 74175b90
  Author :
  Date : 2011-04-28T16:46:16
  

  getaddrinfo: fix gai_strerror signature
  
  Several platforms declare gai_strerror to return char* rather than
  const char*.  Worse, on mingw, if UNICODE is defined, it is defined
  to return WCHAR*, which means the result is in unicode but an
  application expecting bytes for characters will only see a one-byte
  answer.
  
  * m4/getaddrinfo.m4 (gl_GETADDRINFO): Detect broken signatures,
  and work around mingw with UNICODE defined.
  (gl_PREREQ_GETADDRINFO): Drop redundant decl check.
  * m4/netdb_h.m4 (gl_NETDB_H_DEFAULTS): Add witness.
  * modules/netdb (Makefile.am): Substitute it.
  * lib/netdb.in.h (gai_strerror): Declare replacement.
  * lib/gai_strerror.c (rpl_gai_strerror): Fix signature.
  * doc/posix-functions/gai_strerror.texi (gai_strerror): Document
  the fix.
  
  Signed-off-by: Eric Blake <eblake@redhat.com>
  

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• lib/gai_strerror.c

• /* Copyright (C) 1997, 2001-2002, 2004-2006, 2008-2011 Free Software
     Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Philip Blundell <pjb27@cam.ac.uk>, 1997.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2, or (at your option)
     any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software Foundation,
     Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  
  #ifndef _LIBC
  # include <config.h>
  #endif
  
  #include <stdio.h>
  #include <netdb.h>
  
  #ifdef _LIBC
  # include <libintl.h>
  #else
  # include "gettext.h"
  # define _(String) gettext (String)
  # define N_(String) String
  #endif
  
  #if HAVE_DECL_GAI_STRERROR
  
  # include <sys/socket.h>
  # undef gai_strerror
  # if HAVE_DECL_GAI_STRERRORA
  #  define gai_strerror gai_strerrorA
  # endif
  
  const char *
  rpl_gai_strerror (int code)
  {
    return gai_strerror (code);
  }
  
  #else /* !HAVE_DECL_GAI_STRERROR */
  
  static struct
    {
      int code;
      const char *msg;
    }
  values[] =
    {
      { EAI_ADDRFAMILY, N_("Address family for hostname not supported") },
      { EAI_AGAIN, N_("Temporary failure in name resolution") },
      { EAI_BADFLAGS, N_("Bad value for ai_flags") },
      { EAI_FAIL, N_("Non-recoverable failure in name resolution") },
      { EAI_FAMILY, N_("ai_family not supported") },
      { EAI_MEMORY, N_("Memory allocation failure") },
      { EAI_NODATA, N_("No address associated with hostname") },
      { EAI_NONAME, N_("Name or service not known") },
      { EAI_SERVICE, N_("Servname not supported for ai_socktype") },
      { EAI_SOCKTYPE, N_("ai_socktype not supported") },
      { EAI_SYSTEM, N_("System error") },
      { EAI_OVERFLOW, N_("Argument buffer too small") },
  #ifdef EAI_INPROGRESS
      { EAI_INPROGRESS, N_("Processing request in progress") },
      { EAI_CANCELED, N_("Request canceled") },
      { EAI_NOTCANCELED, N_("Request not canceled") },
      { EAI_ALLDONE, N_("All requests done") },
      { EAI_INTR, N_("Interrupted by a signal") },
      { EAI_IDN_ENCODE, N_("Parameter string not correctly encoded") }
  #endif
    };
  
  const char *
  gai_strerror (int code)
  {
    size_t i;
    for (i = 0; i < sizeof (values) / sizeof (values[0]); ++i)
      if (values[i].code == code)
        return _(values[i].msg);
  
    return _("Unknown error");
  }
  # ifdef _LIBC
  libc_hidden_def (gai_strerror)
  # endif
  #endif /* !HAVE_DECL_GAI_STRERROR */
  

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