/* This file is part of GDBM, the GNU data base manager.

   Copyright (C) 2018-2023 Free Software Foundation, Inc.

   GDBM 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.

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

#include "gdbmtool.h"

static ssize_t

instream_null_read (instream_t istr, char *buf, size_t size)

{

  return 0;

}

static void

instream_null_close (instream_t istr)

{

  free (istr);

}

static int

instream_null_eq (instream_t a, instream_t b)

{

  return a == b;

}

instream_t

instream_null_create (void)

{

  struct instream *istr;

  istr = emalloc (sizeof *istr);

  istr->in_name = "null";

  istr->in_inter = 0;

  istr->in_read = instream_null_read;

  istr->in_close = instream_null_close;

  istr->in_eq = instream_null_eq;

  istr->in_history_size = NULL;

  istr->in_history_get = NULL;  

  return istr;

}