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1 /*
2 * Project : tin - a Usenet reader
3 * Module : missing_fd.h
4 * Author : Dennis Grevenstein <dennis.grevenstein@gmail.com>
5 * Created : 2019-03-09
6 * Updated : 2019-03-13
7 * Notes :
8 *
9 * Copyright (c) 2019-2021 Dennis Grevenstein <dennis.grevenstein@gmail.com>
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright notice,
17 * this list of conditions and the following disclaimer.
18 *
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 *
23 * 3. Neither the name of the copyright holder nor the names of its
24 * contributors may be used to endorse or promote products derived from
25 * this software without specific prior written permission.
26 *
27 * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
31 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40
41 #ifndef TIN_MISSING_FD_H
42 # define TIN_MISSING_FD_H
43 # ifndef HAVE_TYPE_FD_SET
44
45 /* for SunOS 3.5 */
46 /* luna - 09-MAR-2019 */
47 # if defined(sun) || defined(__sun) /* && (!defined(__SVR4) || !defined(__svr4__)) && defined(BSD) && BSD < 199306 */
48 typedef long fd_mask;
49 # ifndef FD_SETSIZE
50 # ifdef SUNDBE /* Sun DataBase Excelerator */
51 # define FD_SETSIZE 2048
52 # else
53 # define FD_SETSIZE 256
54 # endif /* SUNDBE */
55 # endif /* !FD_SETSIZE */
56 # ifndef NBBY
57 # define NBBY 8 /* bits per byte */
58 # endif /* !NBBY */
59 # define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
60 # ifndef howmany
61 # define howmany(x, y) (((x) + ((y) - 1)) / (y))
62 # endif /* !howmany */
63
64 typedef struct fd_set {
65 fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
66 } fd_set;
67
68
69 # define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
70 # define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
71 # define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
72 # define FD_ZERO(p) memset((void *)(p), 0, sizeof (*(p)))
73
74 # endif /* sun || __sun */
75 # endif /* !HAVE_TYPE_FD_SET */
76 #endif /* !TIN_MISSING_FD_H */