/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 * Jonathan Schleifer <js@webkeks.org> * * 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" #include <stdlib.h> #include <stdio.h> #import "OFSeekableStream.h" @implementation OFSeekableStream - init { if (object_getClass(self) == [OFSeekableStream class]) { @try { [self doesNotRecognizeSelector: _cmd]; abort(); } @catch (id e) { [self release]; @throw e; } } return [super init]; } - (off_t)lowlevelSeekToOffset: (off_t)offset whence: (int)whence { [self doesNotRecognizeSelector: _cmd]; abort(); } - (off_t)seekToOffset: (off_t)offset whence: (int)whence { if (whence == SEEK_CUR) offset -= _readBufferLength; offset = [self lowlevelSeekToOffset: offset whence: whence]; [self freeMemory: _readBuffer]; _readBuffer = NULL; _readBufferLength = 0; return offset; } @end