/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 2010, 2012, 2014-2016 Free Software Foundation, Inc.

   GNU Mailutils 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.

   GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */

#include "mu.h"

int
mu_vgetyn (const char *fmt, va_list ap)
{
  char repl[64];

  while (1)
    {
      int rc;
      size_t n;
      
      mu_stream_vprintf (mu_strout, fmt, ap);
      mu_stream_write (mu_strout, "? ", 2, NULL);
      mu_stream_flush (mu_strout);
      if (mu_stream_read (mu_strin, repl, sizeof repl, &n) || n == 0)
	return 0;
      mu_rtrim_class (repl, MU_CTYPE_ENDLN);

      rc = mu_true_answer_p (repl);
      
      if (rc >= 0)
	return rc;
      
      /* TRANSLATORS: See msgids "nN" and "yY". */
      mu_stream_printf (mu_strout, "%s", _("Please answer yes or no: "));
    }
  return 0; /* to pacify gcc */
}

int
mu_getyn (const char *fmt, ...)
{
  va_list ap;
  int rc;

  va_start (ap, fmt);
  rc = mu_vgetyn (fmt, ap);
  va_end (ap);
  return rc;
}