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
38 static 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
49 FILE *
funopen(cookie,readfn,writefn,seekfn,closefn)50 funopen(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