/*	$Id: uio.c,v 1.1.1.1 2008/08/24 05:34:48 gmcgarry Exp $	*/
/*
 * Copyright(C) Caldera International Inc. 2001-2002. 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 and documentation must retain the above
 * copyright notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditionsand the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 * 	This product includes software developed or owned by Caldera
 *	International, Inc.
 * Neither the name of Caldera International, Inc. nor the names of other
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
 * INTERNATIONAL, INC. 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 CALDERA INTERNATIONAL, INC. 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 OFLIABILITY, 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.
 */
#include "fio.h"
int reclen;

static int do_ud(ftnint *number, char *ptr, ftnlen len);

static int
do_us(ftnint *number, char *ptr, ftnlen len)
{
	if(reading)
	{
		recpos += *number * len;
		if(recpos>reclen)
		{
			err(elist->cierr,110,"eof/uio");
		}
		fread(ptr,(int)len,(int)(*number),cf);
		return(0);
	}
	else
	{
		reclen += *number * len;
		fwrite(ptr,(int)len,(int)(*number),cf);
		return(0);
	}
}

int
do_uio(ftnint *number, char *ptr, ftnlen len)
{
	if(sequential)
		return(do_us(number,ptr,len));
	else	return(do_ud(number,ptr,len));
}

int
do_ud(ftnint *number, char *ptr, ftnlen len)
{
	recpos += *number * len;
	if(recpos > curunit->url && curunit->url!=1)
		err(elist->cierr,110,"eof/uio");
	if(reading)
	{
		if(fread(ptr,(int)len,(int)(*number),cf)
			!= *number)
			err(elist->cierr,errno,"eof/uio")
		else return(0);
	}
	fwrite(ptr,(int)len,(int)(*number),cf);
	return(0);
}