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* Copyright (c) 2003-2009 Tim Kientzle
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "archive_platform.h"
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__FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_raw.c 201107 2009-12-28 03:25:33Z kientzle $");
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#include "archive_entry.h"
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#include "archive_private.h"
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#include "archive_read_private.h"
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int64_t offset; /* Current position in the file. */
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static int archive_read_format_raw_bid(struct archive_read *);
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static int archive_read_format_raw_cleanup(struct archive_read *);
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static int archive_read_format_raw_read_data(struct archive_read *,
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const void **, size_t *, off_t *);
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static int archive_read_format_raw_read_data_skip(struct archive_read *);
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static int archive_read_format_raw_read_header(struct archive_read *,
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struct archive_entry *);
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archive_read_support_format_raw(struct archive *_a)
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struct raw_info *info;
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struct archive_read *a = (struct archive_read *)_a;
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info = (struct raw_info *)calloc(1, sizeof(*info));
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate raw_info data");
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return (ARCHIVE_FATAL);
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r = __archive_read_register_format(a,
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archive_read_format_raw_bid,
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archive_read_format_raw_read_header,
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archive_read_format_raw_read_data,
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archive_read_format_raw_read_data_skip,
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archive_read_format_raw_cleanup);
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* Bid 1 if this is a non-empty file. Anyone who can really support
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* this should outbid us, so it should generally be safe to use "raw"
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* in conjunction with other formats. But, this could really confuse
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* folks if there are bid errors or minor file damage, so we don't
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* include "raw" as part of support_format_all().
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archive_read_format_raw_bid(struct archive_read *a)
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if (__archive_read_ahead(a, 1, NULL) == NULL)
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* Mock up a fake header.
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archive_read_format_raw_read_header(struct archive_read *a,
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struct archive_entry *entry)
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struct raw_info *info;
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info = (struct raw_info *)(a->format->data);
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if (info->end_of_file)
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return (ARCHIVE_EOF);
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a->archive.archive_format = ARCHIVE_FORMAT_RAW;
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a->archive.archive_format_name = "Raw data";
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archive_entry_set_pathname(entry, "data");
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/* XXX should we set mode to mimic a regular file? XXX */
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/* I'm deliberately leaving most fields unset here. */
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archive_read_format_raw_read_data(struct archive_read *a,
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const void **buff, size_t *size, off_t *offset)
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struct raw_info *info;
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info = (struct raw_info *)(a->format->data);
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if (info->end_of_file)
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return (ARCHIVE_EOF);
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/* Get whatever bytes are immediately available. */
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*buff = __archive_read_ahead(a, 1, &avail);
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/* Consume and return the bytes we just read */
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__archive_read_consume(a, avail);
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*offset = info->offset;
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info->offset += *size;
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} else if (0 == avail) {
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/* Record and return end-of-file. */
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info->end_of_file = 1;
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*offset = info->offset;
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return (ARCHIVE_EOF);
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/* Record and return an error. */
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*offset = info->offset;
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archive_read_format_raw_read_data_skip(struct archive_read *a)
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struct raw_info *info;
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int64_t request = 1024 * 1024 * 1024UL; /* Skip 1 GB at a time. */
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info = (struct raw_info *)(a->format->data);
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if (info->end_of_file)
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return (ARCHIVE_EOF);
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info->end_of_file = 1;
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bytes_skipped = __archive_read_skip_lenient(a, request);
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if (bytes_skipped < 0)
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return (ARCHIVE_FATAL);
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if (bytes_skipped < request)
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/* We skipped all the bytes we asked for. There might
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* be more, so try again. */
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archive_read_format_raw_cleanup(struct archive_read *a)
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struct raw_info *info;
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info = (struct raw_info *)(a->format->data);
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a->format->data = NULL;