adtools/clib2

/*
 * $Id: ioccom.h,v 1.4 2006-01-08 12:06:14 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************
 *
 * Documentation and source code for this library, and the most recent library
 * build are available from <http://sourceforge.net/projects/clib2>.
 *
 *****************************************************************************
 */

#ifndef _SYS_IOCCOM_H
#define _SYS_IOCCOM_H

/****************************************************************************/

/* The following is not part of the ISO 'C' (1994) standard. */

/****************************************************************************/

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/****************************************************************************/

#define    IOCPARM_MASK    0x1fff        /* parameter length, at most 13 bits */
#define    IOCPARM_LEN(x)    (((x) >> 16) & IOCPARM_MASK)
#define    IOCBASECMD(x)    ((x) & ~(IOCPARM_MASK << 16))
#define    IOCGROUP(x)        (((x) >> 8) & 0xff)

#define    IOCPARM_MAX    NBPG    /* max size of ioctl args, mult. of NBPG */

#define    IOC_VOID    (0x20000000UL)        /* no parameters */
#define    IOC_OUT        (0x40000000UL)        /* copy parameters out */
#define    IOC_IN        (0x80000000UL)        /* copy parameters in */
#define    IOC_INOUT    (IOC_IN|IOC_OUT)    /* copy paramters in and out */
#define    IOC_DIRMASK    (0xe0000000UL)        /* mask for IN/OUT/VOID */

#define    _IOC(inout,group,num,len) \
    (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))

#define    _IO(g,n)        _IOC(IOC_VOID,    (g), (n), 0)
#define    _IOR(g,n,t)        _IOC(IOC_OUT,    (g), (n), sizeof(t))
#define    _IOW(g,n,t)        _IOC(IOC_IN,    (g), (n), sizeof(t))
#define    _IOWR(g,n,t)    _IOC(IOC_INOUT,    (g), (n), sizeof(t))

/****************************************************************************/

#ifdef __cplusplus
}
#endif /* __cplusplus */

/****************************************************************************/

#endif /* _SYS_IOCCOM_H */