/*
* Copyright (c) 2008 - 2010
* 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 included in
* the packaging of this file.
*/
#import "OFSeekableStream.h"
#import "OFExceptions.h"
@implementation OFSeekableStream
- _seekToOffset: (off_t)offset
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- (off_t)_seekForwardWithOffset: (off_t)offset
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- (off_t)_seekToOffsetRelativeToEnd: (off_t)offset
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- seekToOffset: (off_t)offset
{
[self flushWriteBuffer];
[self _seekToOffset: offset];
[self freeMemory: cache];
cache = NULL;
cache_len = 0;
return self;
}
- (off_t)seekForwardWithOffset: (off_t)offset
{
off_t ret;
[self flushWriteBuffer];
ret = [self _seekForwardWithOffset: offset - cache_len];
[self freeMemory: cache];
cache = NULL;
cache_len = 0;
return ret;
}
- (off_t)seekToOffsetRelativeToEnd: (off_t)offset
{
off_t ret;
[self flushWriteBuffer];
ret = [self _seekToOffsetRelativeToEnd: offset];
[self freeMemory: cache];
cache = NULL;
cache_len = 0;
return ret;
}
@end