1/* sframe-error.c - Error messages.
2
3   Copyright (C) 2022-2024 Free Software Foundation, Inc.
4
5   This file is part of libsframe.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
19
20#include "sframe-api.h"
21#include <stddef.h>
22#include <string.h>
23
24/* In this file, we want to treat the first item of the SFrame error
25   macro like subsequent items.  */
26#define _SFRAME_FIRST(NAME, VALUE) _SFRAME_ITEM(NAME, VALUE)
27
28/* The error message strings, each in a unique structure member precisely big
29   enough for that error, plus a str member to access them all as a string
30   table.  */
31
32static const char *const _sframe_errlist[] = {
33#define _SFRAME_ITEM(n, s) s,
34_SFRAME_ERRORS
35#undef _SFRAME_ITEM
36};
37
38const char *
39sframe_errmsg (int error)
40{
41  const char *str;
42
43  if (error >= SFRAME_ERR_BASE && (error - SFRAME_ERR_BASE) < SFRAME_ERR_NERR)
44    str = _sframe_errlist[error - SFRAME_ERR_BASE];
45  else
46    str = (const char *) strerror (error);
47
48  return (str ? str : "Unknown error");
49}
50