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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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "streams_array.h"
#include "streams_common.h"
/*
* Single-byte character memory map-based streams implementation
*/
static int
stream_array_prime(stream_t *str)
{
ASSERT((str->s_status & STREAM_SOURCE_MASK) == STREAM_ARRAY);
str->s_type.LA.s_cur_index = MIN(0, str->s_type.LA.s_array_size - 1);
if (str->s_type.LA.s_cur_index >= 0)
copy_line_rec(
str->s_type.LA.s_array[str->s_type.LA.s_cur_index],
&str->s_current);
else {
stream_set(str, STREAM_EOS_REACHED);
stream_unset(str, STREAM_PRIMED);
return (PRIME_FAILED_EMPTY_FILE);
}
stream_set(str, STREAM_PRIMED);
return (PRIME_SUCCEEDED);
}
static ssize_t
stream_array_fetch(stream_t *str)
{
ASSERT(str->s_status & STREAM_OPEN);
ASSERT(str->s_type.LA.s_cur_index < str->s_type.LA.s_array_size);
if (++str->s_type.LA.s_cur_index == str->s_type.LA.s_array_size - 1)
stream_set(str, STREAM_EOS_REACHED);
copy_line_rec(str->s_type.LA.s_array[str->s_type.LA.s_cur_index],
&str->s_current);
return (NEXT_LINE_COMPLETE);
}
/*ARGSUSED*/
static int
stream_array_is_closable(stream_t *str)
{
/*
* Array streams are not closable. That is, there is no open file
* descriptor directly associated with an array stream.
*/
return (0);
}
static int
stream_array_close(stream_t *str)
{
stream_unset(str, STREAM_OPEN | STREAM_PRIMED);
return (1);
}
static int
stream_array_free(stream_t *str)
{
/*
* It's now safe for us to close the various streams backing the array
* stream's data.
*/
stream_unset(str, STREAM_PRIMED | STREAM_NOT_FREEABLE);
return (1);
}
static int
stream_array_eos(stream_t *str)
{
int retval = 0;
if (str == NULL || str->s_status & STREAM_EOS_REACHED)
return (1);
if (str->s_type.LA.s_cur_index + 1 >= str->s_type.LA.s_array_size) {
retval = 1;
stream_set(str, STREAM_EOS_REACHED);
}
return (retval);
}
/*ARGSUSED*/
static void
stream_array_release_line(stream_t *str)
{
}
const stream_ops_t stream_array_ops = {
stream_array_is_closable,
stream_array_close,
stream_array_eos,
stream_array_fetch,
NULL,
stream_array_free,
NULL,
stream_array_prime,
NULL,
stream_array_release_line,
NULL,
NULL
};
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