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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 1994 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.6 */
# include <unistd.h>
# include <errno.h>
# include <stdlib.h>
#if defined(__STDC__)
# include <stdarg.h>
#else
# include <varargs.h>
#endif
# include "lp.h"
# include "msgs.h"
/*
** Size and pointer for mgetm()
*/
static int MBGSize = 0;
static char * MBG = NULL;
/*
** Size and pointer for mputm()
*/
static int MBPSize = 0;
static char * MBP = NULL;
int peek3_2();
#if defined(__STDC__)
int mgetm ( MESG * md, int type, ... )
#else
int mgetm (md, type, va_alist)
MESG *md;
int type;
va_dcl
#endif
{
va_list vp;
int ret;
int needsize;
#if defined(__STDC__)
va_start(vp, type);
#else
va_start(vp);
#endif
needsize = mpeek(md);
if (needsize <=0 || needsize > MSGMAX)
needsize = MSGMAX;
if (needsize > MBGSize)
{
if (MBG)
Free(MBG);
if ((MBG = (char *)Malloc(needsize)) == NULL)
{
MBGSize = 0;
MBG = NULL;
errno = ENOMEM;
return(-1);
}
MBGSize = needsize;
}
if (mread(md, MBG, MBGSize) < 0)
return(-1);
ret = _getmessage(MBG, type, vp);
va_end(vp);
return(ret);
}
#if defined(__STDC__)
int mputm ( MESG * md, int type, ... )
#else
int mputm (md, type, va_alist)
MESG *md;
int type;
va_dcl
#endif
{
va_list vp;
int needsize;
#if defined(__STDC__)
va_start(vp, type);
#else
va_start(vp);
#endif
needsize = _putmessage(NULL, type, vp);
va_end(vp);
if (needsize <= 0)
return(-1);
if (needsize > MBPSize)
{
if (MBP)
Free(MBP);
if ((MBP = (char *)Malloc(needsize)) == NULL)
{
MBPSize = 0;
MBP = NULL;
errno = ENOMEM;
return(-1);
}
MBPSize = needsize;
}
#if defined(__STDC__)
va_start(vp, type);
#else
va_start(vp);
#endif
needsize = _putmessage(MBP, type, vp);
va_end(vp);
if (needsize <= 0)
return(-1);
return(mwrite(md, MBP));
}
#if defined(__STDC__)
void __mbfree ( void )
#else
void __mbfree ()
#endif
{
MBGSize = MBPSize = 0;
if (MBG)
Free (MBG);
if (MBP)
Free (MBP);
MBG = MBP = NULL;
}
#if defined(__STDC__)
short mpeek ( MESG * md )
#else
short mpeek (md)
MESG *md;
#endif
{
int size;
if (md->type == MD_USR_FIFO || md->type == MD_SYS_FIFO)
return(peek3_2(md->readfd) - EXCESS_3_2_LEN);
if (ioctl(md->readfd, I_NREAD, &size))
return((short)size);
return(-1);
}
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