/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012
* 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.
*/
#import "OFSeekableStream.h"
#import "OFNotImplementedException.h"
@implementation OFSeekableStream
- (void)_seekToOffset: (off_t)offset
{
@throw [OFNotImplementedException exceptionWithClass: [self class]
selector: _cmd];
}
- (off_t)_seekForwardWithOffset: (off_t)offset
{
@throw [OFNotImplementedException exceptionWithClass: [self class]
selector: _cmd];
}
- (off_t)_seekToOffsetRelativeToEnd: (off_t)offset
{
@throw [OFNotImplementedException exceptionWithClass: [self class]
selector: _cmd];
}
- (void)seekToOffset: (off_t)offset
{
[self _seekToOffset: offset];
[self freeMemory: cache];
cache = NULL;
cacheLength = 0;
}
- (off_t)seekForwardWithOffset: (off_t)offset
{
off_t ret;
ret = [self _seekForwardWithOffset: offset - cacheLength];
[self freeMemory: cache];
cache = NULL;
cacheLength = 0;
return ret;
}
- (off_t)seekToOffsetRelativeToEnd: (off_t)offset
{
off_t ret;
ret = [self _seekToOffsetRelativeToEnd: offset];
[self freeMemory: cache];
cache = NULL;
cacheLength = 0;
return ret;
}
@end