diff options
Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_read_support_format_raw.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_read_support_format_raw.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_read_support_format_raw.c b/src/libs/3rdparty/libarchive/archive_read_support_format_raw.c new file mode 100644 index 000000000..ec0520b60 --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_read_support_format_raw.c @@ -0,0 +1,192 @@ +/*- + * Copyright (c) 2003-2009 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_raw.c 201107 2009-12-28 03:25:33Z kientzle $"); + +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#include <stdio.h> +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif + +#include "archive.h" +#include "archive_entry.h" +#include "archive_private.h" +#include "archive_read_private.h" + +struct raw_info { + int64_t offset; /* Current position in the file. */ + int64_t unconsumed; + int end_of_file; +}; + +static int archive_read_format_raw_bid(struct archive_read *, int); +static int archive_read_format_raw_cleanup(struct archive_read *); +static int archive_read_format_raw_read_data(struct archive_read *, + const void **, size_t *, int64_t *); +static int archive_read_format_raw_read_data_skip(struct archive_read *); +static int archive_read_format_raw_read_header(struct archive_read *, + struct archive_entry *); + +int +archive_read_support_format_raw(struct archive *_a) +{ + struct raw_info *info; + struct archive_read *a = (struct archive_read *)_a; + int r; + + archive_check_magic(_a, ARCHIVE_READ_MAGIC, + ARCHIVE_STATE_NEW, "archive_read_support_format_raw"); + + info = (struct raw_info *)calloc(1, sizeof(*info)); + if (info == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate raw_info data"); + return (ARCHIVE_FATAL); + } + + r = __archive_read_register_format(a, + info, + "raw", + archive_read_format_raw_bid, + NULL, + archive_read_format_raw_read_header, + archive_read_format_raw_read_data, + archive_read_format_raw_read_data_skip, + NULL, + archive_read_format_raw_cleanup, + NULL, + NULL); + if (r != ARCHIVE_OK) + free(info); + return (r); +} + +/* + * Bid 1 if this is a non-empty file. Anyone who can really support + * this should outbid us, so it should generally be safe to use "raw" + * in conjunction with other formats. But, this could really confuse + * folks if there are bid errors or minor file damage, so we don't + * include "raw" as part of support_format_all(). + */ +static int +archive_read_format_raw_bid(struct archive_read *a, int best_bid) +{ + if (best_bid < 1 && __archive_read_ahead(a, 1, NULL) != NULL) + return (1); + return (-1); +} + +/* + * Mock up a fake header. + */ +static int +archive_read_format_raw_read_header(struct archive_read *a, + struct archive_entry *entry) +{ + struct raw_info *info; + + info = (struct raw_info *)(a->format->data); + if (info->end_of_file) + return (ARCHIVE_EOF); + + a->archive.archive_format = ARCHIVE_FORMAT_RAW; + a->archive.archive_format_name = "raw"; + archive_entry_set_pathname(entry, "data"); + archive_entry_set_filetype(entry, AE_IFREG); + archive_entry_set_perm(entry, 0644); + /* I'm deliberately leaving most fields unset here. */ + + /* Let the filter fill out any fields it might have. */ + return __archive_read_header(a, entry); +} + +static int +archive_read_format_raw_read_data(struct archive_read *a, + const void **buff, size_t *size, int64_t *offset) +{ + struct raw_info *info; + ssize_t avail; + + info = (struct raw_info *)(a->format->data); + + /* Consume the bytes we read last time. */ + if (info->unconsumed) { + __archive_read_consume(a, info->unconsumed); + info->unconsumed = 0; + } + + if (info->end_of_file) + return (ARCHIVE_EOF); + + /* Get whatever bytes are immediately available. */ + *buff = __archive_read_ahead(a, 1, &avail); + if (avail > 0) { + /* Return the bytes we just read */ + *size = avail; + *offset = info->offset; + info->offset += *size; + info->unconsumed = avail; + return (ARCHIVE_OK); + } else if (0 == avail) { + /* Record and return end-of-file. */ + info->end_of_file = 1; + *size = 0; + *offset = info->offset; + return (ARCHIVE_EOF); + } else { + /* Record and return an error. */ + *size = 0; + *offset = info->offset; + return ((int)avail); + } +} + +static int +archive_read_format_raw_read_data_skip(struct archive_read *a) +{ + struct raw_info *info = (struct raw_info *)(a->format->data); + + /* Consume the bytes we read last time. */ + if (info->unconsumed) { + __archive_read_consume(a, info->unconsumed); + info->unconsumed = 0; + } + info->end_of_file = 1; + return (ARCHIVE_OK); +} + +static int +archive_read_format_raw_cleanup(struct archive_read *a) +{ + struct raw_info *info; + + info = (struct raw_info *)(a->format->data); + free(info); + a->format->data = NULL; + return (ARCHIVE_OK); +} |