1/*  $NetBSD: funopen.c,v 1.10 2005/11/29 03:12:00 christos Exp $  */
2
3/*-
4 * Copyright (c) 1990, 1993
5 *  The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34#include  <LibConfig.h>
35#include <sys/EfiCdefs.h>
36#if defined(LIBC_SCCS) && !defined(lint)
37#if 0
38static char sccsid[] = "@(#)funopen.c 8.1 (Berkeley) 6/4/93";
39#else
40__RCSID("$NetBSD: funopen.c,v 1.10 2005/11/29 03:12:00 christos Exp $");
41#endif
42#endif /* LIBC_SCCS and not lint */
43
44#include <stdio.h>
45#include <errno.h>
46#include "reentrant.h"
47#include "local.h"
48
49FILE *
50funopen(cookie, readfn, writefn, seekfn, closefn)
51  const void *cookie;
52  int (*readfn) __P((void *, char *, int));
53  int (*writefn) __P((void *, const char *, int));
54  fpos_t (*seekfn) __P((void *, fpos_t, int));
55  int (*closefn) __P((void *));
56{
57  FILE *fp;
58  int flags;
59
60  if (readfn == NULL) {
61    if (writefn == NULL) {    /* illegal */
62      errno = EINVAL;
63      return (NULL);
64    } else
65      flags = __SWR;    /* write only */
66  } else {
67    if (writefn == NULL)
68      flags = __SRD;    /* read only */
69    else
70      flags = __SRW;    /* read-write */
71  }
72  if ((fp = __sfp()) == NULL)
73    return (NULL);
74  fp->_flags = flags;
75  fp->_file = -1;
76  fp->_cookie = __UNCONST(cookie);
77  fp->_read = readfn;
78  fp->_write = writefn;
79  fp->_seek = seekfn;
80  fp->_close = closefn;
81  return (fp);
82}
83