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/*-
* Copyright (c) 2003-2007 Tim Kientzle
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 THE AUTHOR(S) 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 OF LIABILITY, 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 "archive_platform.h"
__FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_empty.c 191524 2009-04-26 18:24:14Z kientzle $");
#include "archive.h"
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_read_private.h"
static int archive_read_format_empty_bid(struct archive_read *, int);
static int archive_read_format_empty_read_data(struct archive_read *,
const void **, size_t *, int64_t *);
static int archive_read_format_empty_read_header(struct archive_read *,
struct archive_entry *);
int
archive_read_support_format_empty(struct archive *_a)
{
struct archive_read *a = (struct archive_read *)_a;
int r;
archive_check_magic(_a, ARCHIVE_READ_MAGIC,
ARCHIVE_STATE_NEW, "archive_read_support_format_empty");
r = __archive_read_register_format(a,
NULL,
"empty",
archive_read_format_empty_bid,
NULL,
archive_read_format_empty_read_header,
archive_read_format_empty_read_data,
NULL,
NULL,
NULL,
NULL,
NULL);
return (r);
}
static int
archive_read_format_empty_bid(struct archive_read *a, int best_bid)
{
if (best_bid < 1 && __archive_read_ahead(a, 1, NULL) == NULL)
return (1);
return (-1);
}
static int
archive_read_format_empty_read_header(struct archive_read *a,
struct archive_entry *entry)
{
(void)a; /* UNUSED */
(void)entry; /* UNUSED */
a->archive.archive_format = ARCHIVE_FORMAT_EMPTY;
a->archive.archive_format_name = "Empty file";
return (ARCHIVE_EOF);
}
static int
archive_read_format_empty_read_data(struct archive_read *a,
const void **buff, size_t *size, int64_t *offset)
{
(void)a; /* UNUSED */
(void)buff; /* UNUSED */
(void)size; /* UNUSED */
(void)offset; /* UNUSED */
return (ARCHIVE_EOF);
}
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