/* Functions for recorded errors, warnings, and verbose messages.

   Copyright (C) 1998-2018 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; 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/>.  */

#include <stdio.h>

#include <stdlib.h>

#include <stdarg.h>

#include <stdbool.h>

#include <string.h>

#include <error.h>

#include <errno.h>

#include <locale.h>

#include "record-status.h"

/* Warnings recorded by record_warnings.  */

int recorded_warning_count;

/* Errors recorded by record_errors.  */

int recorded_error_count;

/* If not zero suppress warnings and information messages.  */

int be_quiet;

/* If not zero give a lot more messages.  */

int verbose;

/* Warnings which can be disabled:  */

/* By default we check the character map for ASCII compatibility.  */

bool warn_ascii = true;

/* By default we check that the international currency symbol matches a

   known country code.  */

bool warn_int_curr_symbol = true;

/* Alter the current locale to match the locale configured by the

   user, and return the previous saved state.  */

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.  */

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.  */

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, "[verbose] %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.  */

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, "[warning] %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.  */

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, "[error] %s", str);

      free (str);

    }

}

/* ... likewise for error_at_line.  */

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, "[error] %s", str);

      free (str);

    }

}