ObjFW  Diff

 * 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"



#include <string.h>








#import "OFMutableDictionary.h"




#import "OFAutoreleasePool.h"





#import "OFEnumerationMutationException.h"






#import "OFInvalidArgumentException.h"







#import "OFOutOfRangeException.h"




#import "macros.h"








#define DELETED &of_dictionary_deleted_bucket




































@implementation OFMutableDictionary
- (void)_resizeForCount: (size_t)newCount
{
	size_t fullness = newCount * 4 / size;
	struct of_dictionary_bucket **newData;
	uint32_t i, newSize;

	if (newCount > UINT32_MAX)
		@throw [OFOutOfRangeException newWithClass: isa];

	if (fullness >= 3)
		newSize = size << 1;
	else if (fullness <= 1)
		newSize = size >> 1;
	else
		return;

	if (newSize == 0)
		@throw [OFOutOfRangeException newWithClass: isa];

	newData = [self allocMemoryForNItems: newSize
				    withSize: sizeof(*newData)];

	for (i = 0; i < newSize; i++)
		newData[i] = NULL;

	for (i = 0; i < size; i++) {
		if (data[i] != NULL && data[i] != DELETED) {
			uint32_t j, last;

			last = newSize;

			j = data[i]->hash & (newSize - 1);
			for (; j < last && newData[j] != NULL; j++);

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

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

			if (j >= last) {
				[self freeMemory: newData];
				@throw [OFOutOfRangeException
				    newWithClass: isa];
			}

			newData[j] = data[i];
		}
	}

	[self freeMemory: data];
	data = newData;
	size = newSize;
}

- (void)_setObject: (id)object
	    forKey: (id)key
	   copyKey: (BOOL)copyKey
{
	uint32_t i, hash, last;
	id old;

	if (key == nil || object == nil)
		@throw [OFInvalidArgumentException newWithClass: isa
						       selector: _cmd];

	hash = [key hash];
	last = size;

	for (i = hash & (size - 1); i < last && data[i] != NULL; i++) {
		if (data[i] == DELETED)
			continue;

		if ([data[i]->key isEqual: key])
			break;
	}

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

		for (i = 0; i < last && data[i] != NULL; i++) {
			if (data[i] == DELETED)
				continue;

			if ([data[i]->key isEqual: key])
				break;
		}
	}

	/* Key not in dictionary */
	if (i >= last || data[i] == NULL || data[i] == DELETED ||
	    ![data[i]->key isEqual: key]) {
		struct of_dictionary_bucket *bucket;

		[self _resizeForCount: count + 1];

		mutations++;
		last = size;

		for (i = hash & (size - 1); i < last && data[i] != NULL &&
		    data[i] != DELETED; i++);

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

			for (i = 0; i < last && data[i] != NULL &&
			    data[i] != DELETED; i++);
		}

		if (i >= last)
			@throw [OFOutOfRangeException newWithClass: isa];

		bucket = [self allocMemoryWithSize: sizeof(*bucket)];

		@try {
			key = (copyKey ? [key copy] : [key retain]);
		} @catch (id e) {
			[self freeMemory: bucket];
			@throw e;
		}

		@try {
			[object retain];
		} @catch (id e) {
			[self freeMemory: bucket];
			[key release];
			@throw e;
		}

		bucket->key = key;
		bucket->object = object;
		bucket->hash = hash;
		data[i] = bucket;
		count++;

		return;
	}

	old = data[i]->object;
	data[i]->object = [object retain];
	[old release];
}

- (void)setObject: (id)object
	   forKey: (id <OFCopying>)key
{
	[self _setObject: object
		  forKey: key
		 copyKey: YES];
}

- (void)removeObjectForKey: (id <OFCopying>)key
{
	uint32_t i, hash, last;

	if (key == nil)
		@throw [OFInvalidArgumentException newWithClass: isa
						       selector: _cmd];

	hash = [key hash];
	last = size;

	for (i = hash & (size - 1); i < last && data[i] != NULL; i++) {
		if (data[i] == DELETED)
			continue;

		if ([data[i]->key isEqual: key]) {
			[data[i]->key release];
			[data[i]->object release];
			[self freeMemory: data[i]];
			data[i] = DELETED;

			count--;
			mutations++;
			[self _resizeForCount: count];

			return;
		}
	}

	if (i < last)
		return;

	/* In case the last bucket is already used */
	last = hash & (size - 1);

	for (i = 0; i < last && data[i] != NULL; i++) {
		if (data[i] == DELETED)
			continue;

		if ([data[i]->key isEqual: key]) {
			[data[i]->key release];
			[data[i]->object release];
			[self freeMemory: data[i]];
			data[i] = DELETED;

			count--;
			mutations++;
			[self _resizeForCount: count];

			return;
		}
	}
}

- copy
{
	return [[OFDictionary alloc] initWithDictionary: self];
}

- (int)countByEnumeratingWithState: (of_fast_enumeration_state_t*)state
			   objects: (id*)objects
			     count: (int)count_
{
	int ret = [super countByEnumeratingWithState: state
					     objects: objects
					       count: count_];

	state->mutationsPtr = &mutations;

	return ret;
}

- (OFEnumerator*)objectEnumerator
{
	return [[[OFDictionaryObjectEnumerator alloc]
	    initWithDictionary: self
			 data: data
			 size: size
	     mutationsPointer: &mutations] autorelease];
}

- (OFEnumerator*)keyEnumerator
{
	return [[[OFDictionaryKeyEnumerator alloc]
	    initWithDictionary: self
			 data: data
			 size: size
	     mutationsPointer: &mutations] autorelease];
}

#ifdef OF_HAVE_BLOCKS
- (void)enumerateKeysAndObjectsUsingBlock:
    (of_dictionary_enumeration_block_t)block
{
	size_t i;
	BOOL stop = NO;
	unsigned long mutations2 = mutations;

	for (i = 0; i < size && !stop; i++) {
		if (mutations != mutations2)
			@throw [OFEnumerationMutationException
			    newWithClass: isa
				  object: self];

		if (data[i] != NULL && data[i] != DELETED)
			block(data[i]->key, data[i]->object, &stop);
	}
}

- (void)replaceObjectsUsingBlock: (of_dictionary_replace_block_t)block
{
	size_t i;
	BOOL stop = NO;
	unsigned long mutations2 = mutations;

	for (i = 0; i < size && !stop; i++) {
		if (mutations != mutations2)
			@throw [OFEnumerationMutationException
			    newWithClass: isa
				  object: self];

		if (data[i] != NULL && data[i] != DELETED) {
			id new = block(data[i]->key, data[i]->object, &stop);

			if (new == nil)
				@throw [OFInvalidArgumentException
				    newWithClass: isa
					selector: _cmd];

			[new retain];
			[data[i]->object release];
			data[i]->object = new;
		}
	}
}
#endif

- (void)makeImmutable
{
	isa = [OFDictionary class];
}
@end