/* Test of yesno module.
   Copyright (C) 2007-2025 Free Software Foundation, Inc.

   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, 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/>.
*/

#include <config.h>

/* Specification.  */
#include "yesno.h"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "closein.h"
#include "binary-io.h"

/* Test yesno.  Without arguments, read one line.  If first argument
   is zero, close stdin before attempting to read one line.
   Otherwise, read the number of lines specified by first
   argument.  */
int
main (int argc, char **argv)
{
  int i = 1;

  /* yesno recommends that all clients use close_stdin in main.  */
  atexit (close_stdin);
  /* But on mingw, close_stdin leaves stdin's file descriptor at the expected
     position (i.e. where this program left off reading) only if its mode has
     been set to O_BINARY.  If it has been set to O_TEXT, and the file
     descriptor is seekable, and stdin is buffered, the MSVCRT runtime ends up
     setting the file descriptor's position to the expected position _minus_
     the number of LFs not preceded by CR that were read between the expected
     position and the last filled buffer end position.  (I.e. the repositioning
     from the end-of-buffer to the expected position does not work if the input
     file contains end-of-line markers in Unix convention.)  */
  set_binary_mode (0, O_BINARY);

  if (1 < argc)
    i = atoi (argv[1]);
  if (!i)
    {
      i = 1;
      close (0);
    }
  while (i--)
    puts (yesno () ? "Y" : "N");
  return 0;
}
