/* sys/uio.h (gcc + libext) */
/* $Id: uio.h,v 1.3 2000/04/03 18:16:13 veit Exp $ */

/*
 * Copyright (c) 1982, 1986, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	@(#)uio.h	8.5 (Berkeley) 2/22/94
 */
#ifndef _SYS_UIO_H_
#define	_SYS_UIO_H_

#if defined (__cplusplus)
extern "C" {
#endif

struct iovec {
	caddr_t iov_base;	/* Base address. NetBSD: void*iov_base; */
	int 	iov_len;	/* Length. NetBSD: size_t  iov_len; */
};

enum	uio_rw {UIO_READ,UIO_WRITE};

/* Segment flag values. */
enum uio_seg {
	UIO_USERSPACE,		/* from user data space */
	UIO_SYSSPACE		/* from system space */
};

/* needed for sys\socket.h TCPIPV4 now */
#ifdef TCPIPV4
struct uio {
	struct	iovec *uio_iov;	/* pointer to array of iovecs */
	int	uio_iovcnt;	/* number of iovecs in array */
	off_t	uio_offset;	/* offset into file this uio corresponds to */
	size_t	uio_resid;	/* residual i/o count */
	enum	uio_seg uio_segflg; /* see above */
	enum	uio_rw uio_rw;	/* see above */
	struct	proc *uio_procp;/* process if UIO_USERSPACE */
};
#define FREAD   1
#define FWRITE  2
/* Limits  */
#define UIO_SMALLIOV	8		/* 8 on stack, else malloc */
#endif

ssize_t readv(int,__const__ struct iovec*,int);
ssize_t writev(int,__const__ struct iovec*,int);
ssize_t _readv(int,__const__ struct iovec*,int);
ssize_t _writev(int,__const__ struct iovec*,int);

#if defined (__cplusplus)
}
#endif

#endif /* not _SYS_UIO_H */
