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085cbb7 merge lite-2
perry authored
1 /* $NetBSD: struct.h,v 1.4 1998/02/02 21:08:00 perry Exp $ */
9562e47 new RCS ID format.
cgd authored
2
c589a90 initial import of 386bsd-0.1 sources
cgd authored
3 /*-
085cbb7 merge lite-2
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4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
c589a90 initial import of 386bsd-0.1 sources
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6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
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35 * @(#)struct.h 8.1 (Berkeley) 6/2/93
c589a90 initial import of 386bsd-0.1 sources
cgd authored
36 */
37
38 #ifndef _STRUCT_H_
39 #define _STRUCT_H_
40
41 /* Offset of the field in the structure. */
42 #define fldoff(name, field) \
43 ((int)&(((struct name *)0)->field))
44
45 /* Size of the field in the structure. */
46 #define fldsiz(name, field) \
47 (sizeof(((struct name *)0)->field))
48
49 /* Address of the structure from a field. */
50 #define strbase(name, addr, field) \
51 ((struct name *)((char *)(addr) - fldoff(name, field)))
52
53 #endif /* !_STRUCT_H_ */
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