ObjFW  Artifact [0cdeecac33]

Artifact 0cdeecac33a4f4b09d43e6ebcbb909394dba59b4784cd4972ca801028d4172cb:

• File src/OFArray_subarray.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: 2366) [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.
 */

#include "config.h"

#import "OFArray_subarray.h"

#import "OFOutOfRangeException.h"

@implementation OFArray_subarray
+ arrayWithArray: (OFArray*)array
	   range: (of_range_t)range
{
	return [[[self alloc] initWithArray: array
				      range: range] autorelease];
}

- initWithArray: (OFArray*)array_
	  range: (of_range_t)range_
{
	self = [super init];

	@try {
		/* Should usually be retain, as it's useless with a copy */
		array = [array_ copy];
		range = range_;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[array release];

	[super dealloc];
}

- (size_t)count
{
	return range.length;
}

- (id)objectAtIndex: (size_t)index
{
	if (index >= range.length)
		@throw [OFOutOfRangeException exceptionWithClass: isa];

	return [array objectAtIndex: index + range.start];
}

- (void)getObjects: (id*)buffer
	   inRange: (of_range_t)range_
{
	if (range_.start + range_.length > range.length)
		@throw [OFOutOfRangeException exceptionWithClass: isa];

	range_.start += range.start;

	return [array getObjects: buffer
			 inRange: range_];
}

- (size_t)indexOfObject: (id)object
{
	size_t index = [array indexOfObject: object];

	if (index < range.start)
		return OF_INVALID_INDEX;

	index -= range.start;

	if (index >= range.length)
		return OF_INVALID_INDEX;

	return index;
}

- (size_t)indexOfObjectIdenticalTo: (id)object
{
	size_t index = [array indexOfObjectIdenticalTo: object];

	if (index < range.start)
		return OF_INVALID_INDEX;

	index -= range.start;

	if (index >= range.length)
		return OF_INVALID_INDEX;

	return index;
}

- (OFArray*)objectsInRange: (of_range_t)range_
{
	if (range_.start + range_.length > range.length)
		@throw [OFOutOfRangeException exceptionWithClass: isa];

	range_.start += range.start;

	return [array objectsInRange: range_];
}
@end