File: error.h

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/* Declaration for error-reporting function
   Copyright (C) 1995-1997, 2003, 2006, 2008-2018 Free Software Foundation,
   Inc.
   This file is part of the GNU C Library.

   This program 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 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.  */

#ifndef _ERROR_H
#define _ERROR_H 1

/* The __attribute__ feature is available in gcc versions 2.5 and later.
   The __-protected variants of the attributes 'format' and 'printf' are
   accepted by gcc versions 2.6.4 (effectively 2.7) and later.
   We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
   gnulib and libintl do '#define printf __printf__' when they override
   the 'printf' function.  */
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
#else
# define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
#endif

/* On mingw, the flavor of printf depends on whether the extensions module
 * is in use; the check for <stdio.h> determines the witness macro.  */
#ifndef _GL_ATTRIBUTE_SPEC_PRINTF
# if GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
#  define _GL_ATTRIBUTE_SPEC_PRINTF __gnu_printf__
# else
#  define _GL_ATTRIBUTE_SPEC_PRINTF __printf__
# endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

/* Print a message with 'fprintf (stderr, FORMAT, ...)';
   if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM).
   If STATUS is nonzero, terminate the program with 'exit (STATUS)'.  */

extern void error (int __status, int __errnum, const char *__format, ...)
     _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF, 3, 4));

extern void error_at_line (int __status, int __errnum, const char *__fname,
                           unsigned int __lineno, const char *__format, ...)
     _GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF, 5, 6));

/* If NULL, error will flush stdout, then print on stderr the program
   name, a colon and a space.  Otherwise, error will call this
   function without parameters instead.  */
extern void (*error_print_progname) (void);

/* This variable is incremented each time 'error' is called.  */
extern unsigned int error_message_count;

/* Sometimes we want to have at most one error per line.  This
   variable controls whether this mode is selected or not.  */
extern int error_one_per_line;

#ifdef __cplusplus
}
#endif

#endif /* error.h */