Artifact 370eb5f8c857d157e7f010a6d027fc727954c89a0d418db96432cddd01dc34a0:
- File
src/OFTarArchive.m
— part of check-in
[7ecdc71677]
at
2016-05-22 19:53:38
on branch trunk
— Add OFTarArchive
This only implements the UNIX v7 format for now. (user: js, size: 2373) [annotate] [blame] [check-ins using]
/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 * 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 { self = [super init]; @try { _stream = [[OFFile alloc] initWithPath: path mode: @"rb"]; } @catch (id e) { [self release]; @throw e; } 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 retain] autorelease]; } @end