/* Error table.   Copyright (C) 2019-2026 Free Software Foundation, Inc.    This file is part of libctf.    libctf 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 3, 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; see the file COPYING.  If not see   <http://www.gnu.org/licenses/>.  */ #include <ctf-impl.h>#include <stddef.h>#include <string.h> /* This construct is due to Bruno Haible: much thanks.  */ /* Give each structure member a unique name.  The name does not matter, so we   use the enum constant to uniquify them.  */ #define ERRSTRFIELD(N) ctf_errstr##N /* In this file, we want to treat the first item of the ctf error   macro like subsequent items.  */#define _CTF_FIRST(NAME, VALUE) _CTF_ITEM(NAME, VALUE) /* The error message strings, each in a unique structure member precisely big   enough for that error, plus a str member to access them all as a string   table.  */ static const union _ctf_errlist_t{  __extension__ struct  {#define _CTF_ITEM(n, s) char ERRSTRFIELD (n) [sizeof (s)];_CTF_ERRORS#undef _CTF_ITEM  };  char str[1];} _ctf_errlist =  {   {#define _CTF_ITEM(n, s) N_(s),_CTF_ERRORS#undef _CTF_ITEM   }  }; /* Offsets to each member in the string table, computed using offsetof.  */ static const unsigned int _ctf_erridx[] =  {#define _CTF_ITEM(n, s) [n - ECTF_BASE] = offsetof (union _ctf_errlist_t, ERRSTRFIELD (n)),_CTF_ERRORS#undef _CTF_ITEM  }; const char *ctf_errmsg (int error){  const char *str;   if (error >= ECTF_BASE && (error - ECTF_BASE) < ECTF_NERR)    str = _ctf_errlist.str + _ctf_erridx[error - ECTF_BASE];  else    str = (const char *) strerror (error);   return (str ? gettext (str) : _("Unknown error"));} intctf_errno (ctf_dict_t * fp){  return fp->ctf_errno;}