ObjFW  Diff

/*


 * Copyright (c) 2008-2021 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 bool
defaultEqual(void *object1, void *object2)
{
	return (object1 == object2);
}








OF_DIRECT_MEMBERS
@interface OFMapTableEnumerator ()
- (instancetype)of_initWithMapTable: (OFMapTable *)mapTable
			    buckets: (struct of_map_table_bucket **)buckets
			   capacity: (unsigned long)capacity
		   mutationsPointer: (unsigned long *)mutationsPtr
    OF_METHOD_FAMILY(init);

		}
	}

	free(_buckets);

	[super dealloc];
}

static void
resizeForCount(OFMapTable *self, unsigned long count)
{
	unsigned long fullness, capacity;
	struct of_map_table_bucket **buckets;

	if (count > ULONG_MAX / sizeof(*self->_buckets) ||
	    count > ULONG_MAX / 8)
		@throw [OFOutOfRangeException exception];

	fullness = count * 8 / self->_capacity;

	if (fullness >= 6) {
		if (self->_capacity > ULONG_MAX / 2)
			return;

		capacity = self->_capacity * 2;
	} else if (fullness <= 1)
		capacity = self->_capacity / 2;
	else
		return;

	/*
	 * Don't downsize if we have an initial capacity or if we would fall
	 * below the minimum capacity.
	 */
	if ((capacity < self->_capacity && count > self->_count) ||
	    capacity < MIN_CAPACITY)
		return;

	buckets = of_alloc_zeroed(capacity, sizeof(*buckets));

	for (unsigned long i = 0; i < self->_capacity; i++) {
		if (self->_buckets[i] != NULL &&
		    self->_buckets[i] != &deleted) {
			unsigned long j, last;

			last = capacity;

			for (j = self->_buckets[i]->hash & (capacity - 1);
			    j < last && buckets[j] != NULL; j++);

			/* In case the last bucket is already used */
			if (j >= last) {
				last = self->_buckets[i]->hash & (capacity - 1);

				for (j = 0; j < last &&
				    buckets[j] != NULL; j++);
			}

			if (j >= last)
				@throw [OFOutOfRangeException exception];

			buckets[j] = self->_buckets[i];
		}
	}

	free(self->_buckets);
	self->_buckets = buckets;
	self->_capacity = capacity;
}

static void
setObject(OFMapTable *restrict self, void *key, void *object,
    unsigned long hash)
{
	unsigned long i, last;
	void *old;

	if (key == NULL || object == NULL)
		@throw [OFInvalidArgumentException exception];

	hash = OF_ROL(hash, self->_rotate);
	last = self->_capacity;

	for (i = hash & (self->_capacity - 1);
	    i < last && self->_buckets[i] != NULL; i++) {
		if (self->_buckets[i] == &deleted)
			continue;

		if (self->_keyFunctions.equal(self->_buckets[i]->key, key))
			break;
	}

	/* In case the last bucket is already used */
	if (i >= last) {
		last = hash & (self->_capacity - 1);

		for (i = 0; i < last && self->_buckets[i] != NULL; i++) {
			if (self->_buckets[i] == &deleted)
				continue;

			if (self->_keyFunctions.equal(
			    self->_buckets[i]->key, key))
				break;
		}
	}

	/* Key not in map table */
	if (i >= last || self->_buckets[i] == NULL ||
	    self->_buckets[i] == &deleted ||
	    !self->_keyFunctions.equal(self->_buckets[i]->key, key)) {
		struct of_map_table_bucket *bucket;

		resizeForCount(self, self->_count + 1);

		self->_mutations++;
		last = self->_capacity;

		for (i = hash & (self->_capacity - 1); i < last &&
		    self->_buckets[i] != NULL && self->_buckets[i] != &deleted;
		    i++);

		/* In case the last bucket is already used */
		if (i >= last) {
			last = hash & (self->_capacity - 1);

			for (i = 0; i < last && self->_buckets[i] != NULL &&
			    self->_buckets[i] != &deleted; i++);
		}

		if (i >= last)
			@throw [OFOutOfRangeException exception];

		bucket = of_alloc(1, sizeof(*bucket));

		@try {
			bucket->key = self->_keyFunctions.retain(key);
		} @catch (id e) {
			free(bucket);
			@throw e;
		}

		@try {
			bucket->object = self->_objectFunctions.retain(object);
		} @catch (id e) {
			self->_keyFunctions.release(bucket->key);
			free(bucket);
			@throw e;
		}

		bucket->hash = hash;

		self->_buckets[i] = bucket;
		self->_count++;

		return;
	}

	old = self->_buckets[i]->object;
	self->_buckets[i]->object = self->_objectFunctions.retain(object);
	self->_objectFunctions.release(old);
}

- (bool)isEqual: (id)object
{
	OFMapTable *mapTable;

	if (object == self)
		return true;

	    initWithKeyFunctions: _keyFunctions
		 objectFunctions: _objectFunctions
			capacity: _capacity];

	@try {
		for (unsigned long i = 0; i < _capacity; i++)
			if (_buckets[i] != NULL && _buckets[i] != &deleted)
				setObject(copy, _buckets[i]->key,
				    _buckets[i]->object,
				    OF_ROR(_buckets[i]->hash, _rotate));

	} @catch (id e) {
		[copy release];
		@throw e;
	}

	return copy;
}

		if (_keyFunctions.equal(_buckets[i]->key, key))
			return _buckets[i]->object;
	}

	return NULL;
}



















































































































































- (void)setObject: (void *)object forKey: (void *)key

{


	setObject(self, key, object,_keyFunctions.hash(key));
}

- (void)removeObjectForKey: (void *)key
{
	unsigned long i, hash, last;

	if (key == NULL)

			_keyFunctions.release(_buckets[i]->key);
			_objectFunctions.release(_buckets[i]->object);

			free(_buckets[i]);
			_buckets[i] = &deleted;

			_count--;
			resizeForCount(self, _count);

			return;
		}
	}

	if (i < last)
		return;

			_objectFunctions.release(_buckets[i]->object);

			free(_buckets[i]);
			_buckets[i] = &deleted;

			_count--;
			_mutations++;
			resizeForCount(self, _count);

			return;
		}
	}
}

- (void)removeAllObjects