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/* Error table.
Copyright (C) 2019-2020 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"));
}
int
ctf_errno (ctf_file_t * fp)
{
return fp->ctf_errno;
}
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