1 /*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2024 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #define _DEFAULT_SOURCE
37 #include <stdlib.h>
38 #include <stdio-bufio.h>
39
40 FILE *
funopen(const void * cookie,ssize_t (* readfn)(void * cookie,void * buf,size_t n),ssize_t (* writefn)(void * cookie,const void * buf,size_t n),__off_t (* seekfn)(void * cookie,__off_t off,int whence),int (* closefn)(void * cookie))41 funopen (const void *cookie,
42 ssize_t (*readfn)(void *cookie, void *buf, size_t n),
43 ssize_t (*writefn)(void *cookie, const void *buf, size_t n),
44 __off_t (*seekfn)(void *cookie, __off_t off, int whence),
45 int (*closefn)(void *cookie))
46 {
47 struct __file_bufio *bf;
48 char *buf;
49 int open_flags = 0;
50
51 if (readfn)
52 open_flags |= __SRD;
53 if (writefn)
54 open_flags |= __SWR;
55
56 /* Allocate file structure and necessary buffers */
57 bf = calloc(1, sizeof(struct __file_bufio) + BUFSIZ);
58
59 if (bf == NULL)
60 return NULL;
61
62 buf = (char *) (bf + 1);
63
64 *bf = (struct __file_bufio)
65 FDEV_SETUP_BUFIO_PTR(cookie, buf, BUFSIZ, readfn, writefn, seekfn, closefn, open_flags, __BFALL);
66
67 __bufio_lock_init(&(bf->xfile.cfile.file));
68
69 return (FILE *) bf;
70 }
71
