2 Copyright (C) 2019-2020 Free Software Foundation, Inc.
4 This file is part of libctf.
6 libctf is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 See the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; see the file COPYING. If not see
18 <http://www.gnu.org/licenses/>. */
24 /* This construct is due to Bruno Haible: much thanks. */
26 /* Give each structure member a unique name. The name does not matter, so we
27 use the line number in ctf-error.h to uniquify them. */
29 #define ERRSTRFIELD(line) ERRSTRFIELD1 (line)
30 #define ERRSTRFIELD1(line) ctf_errstr##line
32 /* The error message strings, each in a unique structure member precisely big
33 enough for that error, plus a str member to access them all as a string
36 static const union _ctf_errlist_t
40 #define _CTF_STR(n, s) char ERRSTRFIELD (__LINE__) [sizeof (s)];
41 #include "ctf-error.h"
48 #define _CTF_STR(n, s) s,
49 #include "ctf-error.h"
54 /* Offsets to each member in the string table, computed using offsetof. */
56 static const unsigned int _ctf_erridx
[] =
58 #define _CTF_STR(n, s) [n - ECTF_BASE] = offsetof (union _ctf_errlist_t, ERRSTRFIELD (__LINE__)),
59 #include "ctf-error.h"
64 ctf_errmsg (int error
)
68 if (error
>= ECTF_BASE
&& (error
- ECTF_BASE
) < ECTF_NERR
)
69 str
= _ctf_errlist
.str
+ _ctf_erridx
[error
- ECTF_BASE
];
71 str
= (const char *) strerror (error
);
73 return (str
? str
: "Unknown error");
77 ctf_errno (ctf_file_t
* fp
)
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