1 /* Copyright (C) 1997-2022 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 *
gai_strerror(int code)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)
70