/*
* 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 1997 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 1.3 */
/* LINTLIBRARY */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include "lp.h"
#include "msgs.h"
static fifobuffer_t **FifoBufferTable = NULL;
static int FifoBufferTableSize = 0;
/*
** Local functions
*/
static int InitFifoBufferTable (void);
static int GrowFifoBufferTable (int);
static fifobuffer_t *NewFifoBuffer (int);
int
ResetFifoBuffer(int fd)
{
if ((!FifoBufferTableSize) && (InitFifoBufferTable () < 0))
return -1;
if (fd >= FifoBufferTableSize)
return 0;
if (FifoBufferTable [fd]) {
FifoBufferTable [fd]->full = 0;
FifoBufferTable [fd]->psave =
FifoBufferTable [fd]->psave_end =
FifoBufferTable [fd]->save;
}
return 0;
}
fifobuffer_t *
GetFifoBuffer(int fd)
{
if (fd < 0) {
errno = EINVAL;
return NULL;
}
if ((fd >= FifoBufferTableSize) && (GrowFifoBufferTable (fd) < 0))
return NULL;
if (!FifoBufferTable [fd]) {
if (!NewFifoBuffer (fd))
return NULL;
FifoBufferTable [fd]->full = 0;
FifoBufferTable [fd]->psave =
FifoBufferTable [fd]->psave_end =
FifoBufferTable [fd]->save;
}
return FifoBufferTable [fd];
}
static int
InitFifoBufferTable()
{
if (FifoBufferTableSize)
return 0;
FifoBufferTable = (fifobuffer_t **)
Calloc (100, sizeof (fifobuffer_t *));
if (!FifoBufferTable)
return -1; /* ENOMEM is already set. */
FifoBufferTableSize = 100;
return 0;
}
static int
GrowFifoBufferTable (int fd)
{
fifobuffer_t **newpp;
newpp = (fifobuffer_t **)
Realloc ((void*)FifoBufferTable,
(fd+10)*sizeof (fifobuffer_t *));
if (!newpp)
return -1; /* ENOMEM is already set. */
FifoBufferTableSize = fd+10;
return 0;
}
static fifobuffer_t *
NewFifoBuffer(int fd)
{
int i;
for (i=0; i < FifoBufferTableSize; i++)
{
if (FifoBufferTable [i] &&
Fcntl (i, F_GETFL) < 0 &&
errno == EBADF)
{
FifoBufferTable [fd] = FifoBufferTable [i];
FifoBufferTable [i] = NULL;
return FifoBufferTable [fd];
}
}
FifoBufferTable [fd] = (fifobuffer_t *)
Calloc (1, sizeof (fifobuffer_t));
return FifoBufferTable [fd];
}