ObjFW  Artifact [d2de206fb4]

Artifact d2de206fb45c759853299a5722e6a6827225f832cdff638c3f0919e378e4ab17:

• File src/OFSeekableStream.m — part of check-in [e1e7ffa903] at 2011-09-22 23:25:42 on branch trunk — Exceptions are now autoreleased.

  This is safe as an "exception loop" can't happen, since if allocating
  an exception fails, it throws an OFAllocFailedException which is
  preallocated and can always be thrown.

  So, the worst case would be that an autorelease of an exception fails,
  triggering an OFOutOfMemoryException for which there is no memory,
  resulting in an OFAllocFailedException to be thrown. (user: js, size: 1586) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011
 *   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: isa
						    selector: _cmd];
}

- (off_t)_seekForwardWithOffset: (off_t)offset
{
	@throw [OFNotImplementedException exceptionWithClass: isa
						    selector: _cmd];
}

- (off_t)_seekToOffsetRelativeToEnd: (off_t)offset
{
	@throw [OFNotImplementedException exceptionWithClass: isa
						    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