ObjFW  Diff

/*
 * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
 *
 * 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.
 *

static struct {
	Class isa;
} placeholder;

@interface OFMutableArrayPlaceholder: OFMutableArray
@end

static OFComparisonResult
compare(id left, id right, SEL selector)
{
	OFComparisonResult (*comparator)(id, SEL, id) =
	    (OFComparisonResult (*)(id, SEL, id))
	    [left methodForSelector: selector];

	return comparator(left, selector, right);
}

static void
quicksort(OFMutableArray *array, size_t left, size_t right, SEL selector,
    OFArraySortOptions options)
{
	OFComparisonResult ascending, descending;

	if (options & OFArraySortDescending) {
		ascending = OFOrderedDescending;
		descending = OFOrderedAscending;
	} else {
		ascending = OFOrderedAscending;
		descending = OFOrderedDescending;
	}

	while (left < right) {
		size_t i = left;
		size_t j = right - 1;
		id pivot = [array objectAtIndex: right];

		do {
			while (compare([array objectAtIndex: i], pivot,
			    selector) != descending && i < right)
				i++;

			while (compare([array objectAtIndex: j], pivot,
			    selector) != ascending && j > left)
				j--;

			if (i < j)
				[array exchangeObjectAtIndex: i
					   withObjectAtIndex: j];
		} while (i < j);

		if (compare([array objectAtIndex: i], pivot, selector) ==
		    descending)
			[array exchangeObjectAtIndex: i
				   withObjectAtIndex: right];

		if (i > 0)
			quicksort(array, left, i - 1, selector, options);

		left = i + 1;
	}
}

#ifdef OF_HAVE_BLOCKS
static void
quicksortWithBlock(OFMutableArray *array, size_t left, size_t right,
    OFComparator comparator, OFArraySortOptions options)
{
	OFComparisonResult ascending, descending;

	if (options & OFArraySortDescending) {
		ascending = OFOrderedDescending;
		descending = OFOrderedAscending;
	} else {
		ascending = OFOrderedAscending;
		descending = OFOrderedDescending;
	}

	while (left < right) {
		size_t i = left;
		size_t j = right - 1;
		id pivot = [array objectAtIndex: right];

		do {
			while (comparator([array objectAtIndex: i], pivot) !=
			    descending && i < right)
				i++;

			while (comparator([array objectAtIndex: j], pivot) !=
			    ascending && j > left)
				j--;

			if (i < j)
				[array exchangeObjectAtIndex: i
					   withObjectAtIndex: j];
		} while (i < j);

		if (comparator([array objectAtIndex: i], pivot) == descending)
			[array exchangeObjectAtIndex: i
				   withObjectAtIndex: right];

		if (i > 0)
			quicksortWithBlock(array, left, i - 1, comparator,
			    options);

		left = i + 1;
	}
}
#endif

@implementation OFMutableArrayPlaceholder
- (instancetype)init
{
	return (id)[[OFMutableAdjacentArray alloc] init];
}

- (instancetype)initWithObjects: (id const *)objects count: (size_t)count
{
	return (id)[[OFMutableAdjacentArray alloc] initWithObjects: objects
							     count: count];
}

- (instancetype)initWithSerialization: (OFXMLElement *)element
{
	return (id)[[OFMutableAdjacentArray alloc]
	    initWithSerialization: element];
}

- (instancetype)retain
{
	return self;
}

- (instancetype)autorelease
{

	}
}

- (void)sort
{
	[self sortUsingSelector: @selector(compare:) options: 0];
}












- (void)sortUsingSelector: (SEL)selector
		  options: (OFArraySortOptions)options
{
	size_t count = self.count;

	if (count == 0 || count == 1)
		return;

	quicksort(self, 0, count - 1, selector, options);













}

#ifdef OF_HAVE_BLOCKS








- (void)sortUsingComparator: (OFComparator)comparator
		    options: (OFArraySortOptions)options
{
	size_t count = self.count;

	if (count == 0 || count == 1)
		return;

	quicksortWithBlock(self, 0, count - 1, comparator, options);
}
#endif

- (void)reverse
{
	size_t i, j, count = self.count;