/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
* Jonathan Schleifer <js@heap.zone>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#import "OFTarArchive.h"
#import "OFTarArchiveEntry.h"
#import "OFTarArchiveEntry+Private.h"
#import "OFStream.h"
#ifdef OF_HAVE_FILES
# import "OFFile.h"
#endif
#import "OFInvalidFormatException.h"
@implementation OFTarArchive: OFObject
+ (instancetype)archiveWithStream: (OFStream *)stream
{
return [[[self alloc] initWithStream: stream] autorelease];
}
#ifdef OF_HAVE_FILES
+ (instancetype)archiveWithPath: (OFString *)path
{
return [[[self alloc] initWithPath: path] autorelease];
}
#endif
- initWithStream: (OFStream *)stream
{
self = [super init];
_stream = [stream retain];
return self;
}
#ifdef OF_HAVE_FILES
- initWithPath: (OFString *)path
{
OFFile *file = [[OFFile alloc] initWithPath: path
mode: @"rb"];
@try {
self = [self initWithStream: file];
} @finally {
[file release];
}
return self;
}
#endif
- (void)dealloc
{
[_stream release];
[_lastReturnedEntry release];
[super dealloc];
}
- (OFTarArchiveEntry *)nextEntry
{
union {
char c[512];
uint32_t u32[512 / sizeof(uint32_t)];
} buffer;
bool empty = true;
[_lastReturnedEntry of_skip];
[_lastReturnedEntry close];
[_lastReturnedEntry release];
_lastReturnedEntry = nil;
if ([_stream isAtEndOfStream])
return nil;
[_stream readIntoBuffer: buffer.c
exactLength: 512];
for (size_t i = 0; i < 512 / sizeof(uint32_t); i++)
if (buffer.u32[i] != 0)
empty = false;
if (empty) {
[_stream readIntoBuffer: buffer.c
exactLength: 512];
for (size_t i = 0; i < 512 / sizeof(uint32_t); i++)
if (buffer.u32[i] != 0)
@throw [OFInvalidFormatException exception];
return nil;
}
_lastReturnedEntry = [[OFTarArchiveEntry alloc]
of_initWithHeader: buffer.c
stream: _stream];
return _lastReturnedEntry;
}
@end