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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1986 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */
/*LINTLIBRARY*/
#include <stdio.h>
extern void free();
extern unsigned char (*_smbuf)[_SBFSIZ];
extern char *malloc();
extern void _getsmbuf();
int
setvbuf(iop, buf, type, size)
register FILE *iop;
register char *buf;
register int type;
register int size;
{
register int fno = fileno(iop); /* file number */
if(iop->_base != NULL && iop->_flag & _IOMYBUF)
free((char*)iop->_base);
iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
switch (type) {
/*note that the flags are the same as the possible values for type*/
case _IONBF:
/* file is unbuffered except in fastio */
iop->_flag |= _IONBF;
/* use small buffers reserved for this */
iop->_base = _smbuf[fno];
iop->_bufsiz = _SBFSIZ;
break;
case _IOLBF:
case _IOFBF:
if (size < 0)
return -1;
iop->_flag |= type;
size = (size == 0) ? BUFSIZ : size;
/*
* need eight characters beyond bufend for stdio slop
*/
if (size <= 8) {
size = BUFSIZ;
buf = NULL;
}
if (buf == NULL) {
size += 8;
buf = malloc((unsigned)size);
iop->_flag |= _IOMYBUF;
}
iop->_base = (unsigned char *)buf;
iop->_bufsiz = size - 8;
break;
default:
return -1;
}
iop->_ptr = iop->_base;
iop->_cnt = 0;
return 0;
}
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