ObjFW  Artifact [cf10b6e3aa]

Artifact cf10b6e3aa6511f48d8084daef4f385b31906e207251416d5a3bf67ee79f6792:

• File src/exceptions/OFSeekFailedException.m — part of check-in [62e2de30b9] at 2015-02-16 08:39:17 on branch trunk — Explicitly pass errno to exceptions

  The old behaviour where the exception would access errno directly on
  creation of the exception was very fragile. The two main problems with
  it were that sometimes it would pick up an errno even though none had
  been set and in other cases that when the exception was created errno
  had already been overridden.

  This also greatly increases errno handling on Win32, especially in
  conjunction with sockets. It can still be improved further, though. (user: js, size: 1687) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
 *   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"

#import "OFSeekFailedException.h"
#import "OFString.h"
#import "OFSeekableStream.h"

@implementation OFSeekFailedException
+ (instancetype)exceptionWithStream: (OFSeekableStream*)stream
			     offset: (of_offset_t)offset
			     whence: (int)whence
			      errNo: (int)errNo
{
	return [[[self alloc] initWithStream: stream
				      offset: offset
				      whence: whence
				       errNo: errNo] autorelease];
}

- init
{
	OF_INVALID_INIT_METHOD
}

- initWithStream: (OFSeekableStream*)stream
	  offset: (of_offset_t)offset
	  whence: (int)whence
	   errNo: (int)errNo
{
	self = [super init];

	_stream = [stream retain];
	_offset = offset;
	_whence = whence;
	_errNo = errNo;

	return self;
}

- (void)dealloc
{
	[_stream release];

	[super dealloc];
}

- (OFString*)description
{
	return [OFString stringWithFormat:
	    @"Seeking failed in stream of type %@: %@",
	    [_stream class], of_strerror(_errNo)];
}

- (OFSeekableStream*)stream
{
	OF_GETTER(_stream, true)
}

- (of_offset_t)offset
{
	return _offset;
}

- (int)whence
{
	return _whence;
}

- (int)errNo
{
	return _errNo;
}
@end