mes/lib/stdio/fdgets.c

/* -*-comment-start: "//";comment-end:""-*-
 * GNU Mes --- Maxwell Equations of Software
 * Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 *
 * This file is part of GNU Mes.
 *
 * GNU Mes 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 of the License, or (at
 * your option) any later version.
 *
 * GNU Mes 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 Mes.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>

char *
fdgets (char *s, int count, int fd)
{
  int c = 0;
  char *p = s;
  while (--count > 0 && c != '\n')
    {
      c = fdgetc (fd);
      if (c == EOF)
        break;
      *p++ = c;
    }
  if (p == s && (c == EOF || count == -1))
    return 0;
  *p = 0;
  return s;
}