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Annotation of src/include/struct.h, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: struct.h,v 1.3 1994/10/26 00:56:32 cgd Exp $   */
        !             2:
        !             3: /*-
        !             4:  * Copyright (c) 1983 The Regents of the University of California.
        !             5:  * All rights reserved.
        !             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:  *
        !            35:  *     @(#)struct.h    5.2 (Berkeley) 4/3/91
        !            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_ */