1/* Declaration for error-reporting function
2 Copyright (C) 1995-1997, 2003, 2006, 2008-2019 Free Software Foundation,
3 Inc.
4 This file is part of the GNU C Library.
5
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <https://www.gnu.org/licenses/>. */
18
19#ifndef _ERROR_H
20#define _ERROR_H 1
21
22/* The __attribute__ feature is available in gcc versions 2.5 and later.
23 The __-protected variants of the attributes 'format' and 'printf' are
24 accepted by gcc versions 2.6.4 (effectively 2.7) and later.
25 We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
26 gnulib and libintl do '#define printf __printf__' when they override
27 the 'printf' function. */
28#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
29# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
30#else
31# define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
32#endif
33
34/* On mingw, the flavor of printf depends on whether the extensions module
35 * is in use; the check for <stdio.h> determines the witness macro. */
36#ifndef _GL_ATTRIBUTE_SPEC_PRINTF
37# if GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
38# define _GL_ATTRIBUTE_SPEC_PRINTF __gnu_printf__
39# else
40# define _GL_ATTRIBUTE_SPEC_PRINTF __printf__
41# endif
42#endif
43
44#ifdef __cplusplus
45extern "C" {
46#endif
47
48/* Print a message with 'fprintf (stderr, FORMAT, ...)';
49 if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM).
50 If STATUS is nonzero, terminate the program with 'exit (STATUS)'. */
51
52extern void error (int __status, int __errnum, const char *__format, ...)
53 _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF, 3, 4));
54
55extern void error_at_line (int __status, int __errnum, const char *__fname,
56 unsigned int __lineno, const char *__format, ...)
57 _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF, 5, 6));
58
59/* If NULL, error will flush stdout, then print on stderr the program
60 name, a colon and a space. Otherwise, error will call this
61 function without parameters instead. */
62extern void (*error_print_progname) (void);
63
64/* This variable is incremented each time 'error' is called. */
65extern unsigned int error_message_count;
66
67/* Sometimes we want to have at most one error per line. This
68 variable controls whether this mode is selected or not. */
69extern int error_one_per_line;
70
71#ifdef __cplusplus
72}
73#endif
74
75#endif /* error.h */
76