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/* General definitions for recording error and warning status.
Copyright (C) 1998-2017 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; version 2 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 <http://www.gnu.org/licenses/>. */
#ifndef _RECORD_STATUS_H
#define _RECORD_STATUS_H 1
#include <stdlib.h>
#include <stdarg.h>
#include <error.h>
#include <locale.h>
#include <string.h>
/* We tentatively define all of the global data we use:
* recorded_warning_count: Number of warnings counted.
* recorded_error_count: Number of errors counted.
* be_quiet: Should all calls be silent?
* verbose: Should verbose messages be printed? */
int recorded_warning_count;
int recorded_error_count;
int be_quiet;
int verbose;
/* Saved locale state. */
struct locale_state
{
/* The current in-use locale. */
char *cur_locale;
};
/* Alter the current locale to match the locale configured by the
user, and return the previous saved state. */
static struct locale_state
push_locale (void)
{
int saved_errno;
const char *orig;
char *copy = NULL;
saved_errno = errno;
orig = setlocale (LC_CTYPE, NULL);
if (orig == NULL)
error (0, 0, "failed to read locale!");
if (setlocale (LC_CTYPE, "") == NULL)
error (0, 0, "failed to set locale!");
errno = saved_errno;
if (orig != NULL)
copy = strdup (orig);
/* We will return either a valid locale or NULL if we failed
to save the locale. */
return (struct locale_state) { .cur_locale = copy };
}
/* Use the saved state to restore the locale. */
static void
pop_locale (struct locale_state ls)
{
const char *set = NULL;
/* We might have failed to save the locale, so only attempt to
restore a validly saved non-NULL locale. */
if (ls.cur_locale != NULL)
{
set = setlocale (LC_CTYPE, ls.cur_locale);
if (set == NULL)
error (0, 0, "failed to restore %s locale!", ls.cur_locale);
free (ls.cur_locale);
}
}
/* Wrapper to print verbose informative messages.
Verbose messages are only printed if --verbose
is in effect and --quiet is not. */
static void
__attribute__ ((__format__ (__printf__, 2, 3), nonnull (1, 2), unused))
record_verbose (FILE *stream, const char *format, ...)
{
char *str;
va_list arg;
if (!verbose)
return;
if (!be_quiet)
{
struct locale_state ls;
int ret;
va_start (arg, format);
ls = push_locale ();
ret = vasprintf (&str, format, arg);
if (ret == -1)
abort ();
pop_locale (ls);
va_end (arg);
fprintf (stream, "%s\n", str);
free (str);
}
}
/* Wrapper to print warning messages. We keep track of how
many were called because this effects our exit code.
Nothing is printed if --quiet is in effect, but warnings
are always counted. */
static void
__attribute__ ((__format__ (__printf__, 1, 2), nonnull (1), unused))
record_warning (const char *format, ...)
{
char *str;
va_list arg;
recorded_warning_count++;
if (!be_quiet)
{
struct locale_state ls;
int ret;
va_start (arg, format);
ls = push_locale ();
ret = vasprintf (&str, format, arg);
if (ret == -1)
abort ();
pop_locale (ls);
va_end (arg);
fprintf (stderr, "%s\n", str);
free (str);
}
}
/* Wrapper to print error messages. We keep track of how
many were called because this effects our exit code.
Nothing is printed if --quiet is in effect, but errors
are always counted, and fatal errors always exit the
program. */
static void
__attribute__ ((__format__ (__printf__, 3, 4), nonnull (3), unused))
record_error (int status, int errnum, const char *format, ...)
{
char *str;
va_list arg;
recorded_error_count++;
/* The existing behaviour is that even if you use --quiet, a fatal
error is always printed and terminates the process. */
if (!be_quiet || status != 0)
{
struct locale_state ls;
int ret;
va_start (arg, format);
ls = push_locale ();
ret = vasprintf (&str, format, arg);
if (ret == -1)
abort ();
pop_locale (ls);
va_end (arg);
error (status, errnum, "%s", str);
free (str);
}
}
/* ... likewise for error_at_line. */
static void
__attribute__ ((__format__ (__printf__, 5, 6), nonnull (3, 5), unused))
record_error_at_line (int status, int errnum, const char *filename,
unsigned int linenum, const char *format, ...)
{
char *str;
va_list arg;
recorded_error_count++;
/* The existing behaviour is that even if you use --quiet, a fatal
error is always printed and terminates the process. */
if (!be_quiet || status != 0)
{
struct locale_state ls;
int ret;
va_start (arg, format);
ls = push_locale ();
ret = vasprintf (&str, format, arg);
if (ret == -1)
abort ();
pop_locale (ls);
va_end (arg);
error_at_line (status, errnum, filename, linenum, "%s", str);
free (str);
}
}
#endif
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