diff options
-rw-r--r-- | lib/libarchive/archive_read_support_format_raw.c | 374 |
1 files changed, 187 insertions, 187 deletions
diff --git a/lib/libarchive/archive_read_support_format_raw.c b/lib/libarchive/archive_read_support_format_raw.c index 7fcfcc1..44b0aa0 100644 --- a/lib/libarchive/archive_read_support_format_raw.c +++ b/lib/libarchive/archive_read_support_format_raw.c @@ -1,187 +1,187 @@ -/*-
- * 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("$FreeBSD$");
-
-#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. */
- int end_of_file;
-};
-
-static int archive_read_format_raw_bid(struct archive_read *);
-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 *, off_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;
-
- 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,
- archive_read_format_raw_cleanup);
- 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)
-{
- const char *p;
-
- if ((p = __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 data";
- archive_entry_set_pathname(entry, "data");
- /* XXX should we set mode to mimic a regular file? XXX */
- /* I'm deliberately leaving most fields unset here. */
- return (ARCHIVE_OK);
-}
-
-static int
-archive_read_format_raw_read_data(struct archive_read *a,
- const void **buff, size_t *size, off_t *offset)
-{
- struct raw_info *info;
- ssize_t avail;
-
- info = (struct raw_info *)(a->format->data);
- if (info->end_of_file)
- return (ARCHIVE_EOF);
-
- /* Get whatever bytes are immediately available. */
- *buff = __archive_read_ahead(a, 1, &avail);
- if (avail > 0) {
- /* Consume and return the bytes we just read */
- __archive_read_consume(a, avail);
- *size = avail;
- *offset = info->offset;
- info->offset += *size;
- 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 (avail);
- }
- return (ARCHIVE_OK);
-}
-
-static int
-archive_read_format_raw_read_data_skip(struct archive_read *a)
-{
- struct raw_info *info;
- off_t bytes_skipped;
- int64_t request = 1024 * 1024 * 1024UL; /* Skip 1 GB at a time. */
-
- info = (struct raw_info *)(a->format->data);
- if (info->end_of_file)
- return (ARCHIVE_EOF);
- info->end_of_file = 1;
-
- for (;;) {
- bytes_skipped = __archive_read_skip_lenient(a, request);
- if (bytes_skipped < 0)
- return (ARCHIVE_FATAL);
- if (bytes_skipped < request)
- return (ARCHIVE_OK);
- /* We skipped all the bytes we asked for. There might
- * be more, so try again. */
- }
-}
-
-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);
-}
+/*- + * 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("$FreeBSD$"); + +#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. */ + int end_of_file; +}; + +static int archive_read_format_raw_bid(struct archive_read *); +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 *, off_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; + + 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, + archive_read_format_raw_cleanup); + 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) +{ + const char *p; + + if ((p = __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 data"; + archive_entry_set_pathname(entry, "data"); + /* XXX should we set mode to mimic a regular file? XXX */ + /* I'm deliberately leaving most fields unset here. */ + return (ARCHIVE_OK); +} + +static int +archive_read_format_raw_read_data(struct archive_read *a, + const void **buff, size_t *size, off_t *offset) +{ + struct raw_info *info; + ssize_t avail; + + info = (struct raw_info *)(a->format->data); + if (info->end_of_file) + return (ARCHIVE_EOF); + + /* Get whatever bytes are immediately available. */ + *buff = __archive_read_ahead(a, 1, &avail); + if (avail > 0) { + /* Consume and return the bytes we just read */ + __archive_read_consume(a, avail); + *size = avail; + *offset = info->offset; + info->offset += *size; + 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 (avail); + } + return (ARCHIVE_OK); +} + +static int +archive_read_format_raw_read_data_skip(struct archive_read *a) +{ + struct raw_info *info; + off_t bytes_skipped; + int64_t request = 1024 * 1024 * 1024UL; /* Skip 1 GB at a time. */ + + info = (struct raw_info *)(a->format->data); + if (info->end_of_file) + return (ARCHIVE_EOF); + info->end_of_file = 1; + + for (;;) { + bytes_skipped = __archive_read_skip_lenient(a, request); + if (bytes_skipped < 0) + return (ARCHIVE_FATAL); + if (bytes_skipped < request) + return (ARCHIVE_OK); + /* We skipped all the bytes we asked for. There might + * be more, so try again. */ + } +} + +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); +} |