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