mirror of
https://github.com/samsonjs/arq_restore.git
synced 2026-04-20 13:35:47 +00:00
121 lines
4.3 KiB
Objective-C
121 lines
4.3 KiB
Objective-C
/*
|
|
Copyright (c) 2009-2017, Haystack Software LLC https://www.arqbackup.com
|
|
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
* 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.
|
|
|
|
* Neither the names of PhotoMinds LLC or Haystack Software, nor the names of
|
|
their contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
"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 COPYRIGHT
|
|
OWNER OR CONTRIBUTORS 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 <libkern/OSByteOrder.h>
|
|
#import "PackIndex.h"
|
|
#import "PackIndexEntry.h"
|
|
#import "NSString_extra.h"
|
|
#import "Fark.h"
|
|
#import "StringIO.h"
|
|
#import "IntegerIO.h"
|
|
#import "DataInputStream.h"
|
|
#import "BufferedInputStream.h"
|
|
|
|
|
|
typedef struct index_object {
|
|
uint64_t nbo_offset;
|
|
uint64_t nbo_datalength;
|
|
unsigned char sha1[20];
|
|
unsigned char filler[4];
|
|
} index_object;
|
|
|
|
typedef struct pack_index {
|
|
uint32_t magic_number;
|
|
uint32_t nbo_version;
|
|
uint32_t nbo_fanout[256];
|
|
index_object first_index_object;
|
|
} pack_index;
|
|
|
|
|
|
@implementation PackIndex
|
|
- (id)initWithPackId:(PackId *)thePackId indexData:(NSData *)theIndexData {
|
|
if (self = [super init]) {
|
|
packId = [thePackId retain];
|
|
indexData = [theIndexData retain];
|
|
}
|
|
return self;
|
|
}
|
|
- (void)dealloc {
|
|
[packId release];
|
|
[indexData release];
|
|
[super dealloc];
|
|
}
|
|
|
|
- (NSArray *)packIndexEntries:(NSError **)error {
|
|
NSMutableArray *ret = [NSMutableArray array];
|
|
|
|
if ([indexData length] == 0) {
|
|
HSLogWarn(@"encounted a 0-length pack index file for %@; ignoring", packId);
|
|
return ret;
|
|
}
|
|
|
|
if ([indexData length] < sizeof(pack_index)) {
|
|
SETNSERROR([self errorDomain], -1, @"pack index data length %ld is smaller than size of pack_index", (unsigned long)[indexData length]);
|
|
return nil;
|
|
}
|
|
pack_index *the_pack_index = (pack_index *)[indexData bytes];
|
|
uint32_t count = OSSwapBigToHostInt32(the_pack_index->nbo_fanout[255]);
|
|
|
|
// HSLogDebug(@"count=%d sizeof(pack_index)=%ld sizeof(index_object)=%ld data length=%ld", count, sizeof(pack_index), sizeof(index_object), [indexData length]);
|
|
|
|
if ([indexData length] < sizeof(pack_index) + (count - 1) * sizeof(index_object)) {
|
|
SETNSERROR([self errorDomain], -1, @"pack index data length %ld is smaller than size of pack_index + index_objects", (unsigned long)[indexData length]);
|
|
return nil;
|
|
}
|
|
index_object *indexObjects = &(the_pack_index->first_index_object);
|
|
NSAutoreleasePool *pool = nil;
|
|
for (uint32_t i = 0; i < count; i++) {
|
|
[pool drain];
|
|
pool = [[NSAutoreleasePool alloc] init];
|
|
uint64_t offset = OSSwapBigToHostInt64(indexObjects[i].nbo_offset);
|
|
uint64_t dataLength = OSSwapBigToHostInt64(indexObjects[i].nbo_datalength);
|
|
NSString *objectSHA1 = [NSString hexStringWithBytes:indexObjects[i].sha1 length:20];
|
|
PackIndexEntry *pie = [[[PackIndexEntry alloc] initWithPackId:packId offset:offset dataLength:dataLength objectSHA1:objectSHA1] autorelease];
|
|
[ret addObject:pie];
|
|
}
|
|
[pool drain];
|
|
pool = nil;
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
#pragma mark NSObject
|
|
- (NSString *)errorDomain {
|
|
return @"PackIndexErrorDomain";
|
|
}
|
|
- (NSString *)description {
|
|
return [NSString stringWithFormat:@"<PackIndex: %@>", [packId description]];
|
|
}
|
|
@end
|