/*
* Copyright (c) 2008-2023 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.
*
* 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"
#include <stdlib.h>
#import "OFSet.h"
#import "OFArray.h"
#import "OFMapTableSet.h"
#import "OFNull.h"
#import "OFString.h"
static struct {
Class isa;
} placeholder;
@interface OFSetPlaceholder: OFSet
@end
@implementation OFSetPlaceholder
- (instancetype)init
{
return (id)[[OFMapTableSet alloc] init];
}
- (instancetype)initWithSet: (OFSet *)set
{
return (id)[[OFMapTableSet alloc] initWithSet: set];
}
- (instancetype)initWithArray: (OFArray *)array
{
return (id)[[OFMapTableSet alloc] initWithArray: array];
}
- (instancetype)initWithObjects: (id)firstObject, ...
{
id ret;
va_list arguments;
va_start(arguments, firstObject);
ret = [[OFMapTableSet alloc] initWithObject: firstObject
arguments: arguments];
va_end(arguments);
return ret;
}
- (instancetype)initWithObjects: (id const *)objects count: (size_t)count
{
return (id)[[OFMapTableSet alloc] initWithObjects: objects
count: count];
}
- (instancetype)initWithObject: (id)firstObject arguments: (va_list)arguments
{
return (id)[[OFMapTableSet alloc] initWithObject: firstObject
arguments: arguments];
}
- (instancetype)retain
{
return self;
}
- (instancetype)autorelease
{
return self;
}
- (void)release
{
}
- (void)dealloc
{
OF_DEALLOC_UNSUPPORTED
}
@end
@implementation OFSet
+ (void)initialize
{
if (self == [OFSet class])
placeholder.isa = [OFSetPlaceholder class];
}
+ (instancetype)alloc
{
if (self == [OFSet class])
return (id)&placeholder;
return [super alloc];
}
+ (instancetype)set
{
return [[[self alloc] init] autorelease];
}
+ (instancetype)setWithSet: (OFSet *)set
{
return [[[self alloc] initWithSet: set] autorelease];
}
+ (instancetype)setWithArray: (OFArray *)array
{
return [[[self alloc] initWithArray: array] autorelease];
}
+ (instancetype)setWithObjects: (id)firstObject, ...
{
id ret;
va_list arguments;
va_start(arguments, firstObject);
ret = [[[self alloc] initWithObject: firstObject
arguments: arguments] autorelease];
va_end(arguments);
return ret;
}
+ (instancetype)setWithObjects: (id const *)objects count: (size_t)count
{
return [[[self alloc] initWithObjects: objects
count: count] autorelease];
}
- (instancetype)init
{
if ([self isMemberOfClass: [OFSet class]]) {
@try {
[self doesNotRecognizeSelector: _cmd];
} @catch (id e) {
[self release];
@throw e;
}
abort();
}
return [super init];
}
- (instancetype)initWithSet: (OFSet *)set
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithArray: (OFArray *)array
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithObjects: (id const *)objects count: (size_t)count
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithObjects: (id)firstObject, ...
{
id ret;
va_list arguments;
va_start(arguments, firstObject);
ret = [self initWithObject: firstObject arguments: arguments];
va_end(arguments);
return ret;
}
- (instancetype)initWithObject: (id)firstObject arguments: (va_list)arguments
{
OF_INVALID_INIT_METHOD
}
- (size_t)count
{
OF_UNRECOGNIZED_SELECTOR
}
- (id)valueForKey: (OFString *)key
{
id ret;
if ([key isEqual: @"@count"])
return [super valueForKey: @"count"];
ret = [OFMutableSet setWithCapacity: self.count];
for (id object in self) {
id value = [object valueForKey: key];
if (value != nil)
[ret addObject: value];
}
[ret makeImmutable];
return ret;
}
- (void)setValue: (id)value forKey: (OFString *)key
{
for (id object in self)
[object setValue: value forKey: key];
}
- (bool)containsObject: (id)object
{
OF_UNRECOGNIZED_SELECTOR
}
- (OFEnumerator *)objectEnumerator
{
OF_UNRECOGNIZED_SELECTOR
}
- (int)countByEnumeratingWithState: (OFFastEnumerationState *)state
objects: (id *)objects
count: (int)count
{
OFEnumerator *enumerator;
int i;
memcpy(&enumerator, state->extra, sizeof(enumerator));
if (enumerator == nil) {
enumerator = [self objectEnumerator];
memcpy(state->extra, &enumerator, sizeof(enumerator));
}
state->itemsPtr = objects;
state->mutationsPtr = (unsigned long *)self;
for (i = 0; i < count; i++) {
id object = [enumerator nextObject];
if (object == nil)
return i;
objects[i] = object;
}
return i;
}
- (bool)isEqual: (id)object
{
OFSet *set;
if (object == self)
return true;
if (![object isKindOfClass: [OFSet class]])
return false;
set = object;
if (set.count != self.count)
return false;
return [set isSubsetOfSet: self];
}
- (unsigned long)hash
{
void *pool = objc_autoreleasePoolPush();
unsigned long hash = 0;
for (id object in self)
hash ^= [object hash];
objc_autoreleasePoolPop(pool);
return hash;
}
- (OFString *)description
{
void *pool;
OFMutableString *ret;
size_t i, count = self.count;
if (count == 0)
return @"{()}";
ret = [OFMutableString stringWithString: @"{(\n"];
pool = objc_autoreleasePoolPush();
i = 0;
for (id object in self) {
void *pool2 = objc_autoreleasePoolPush();
[ret appendString: [object description]];
if (++i < count)
[ret appendString: @",\n"];
objc_autoreleasePoolPop(pool2);
}
[ret replaceOccurrencesOfString: @"\n" withString: @"\n\t"];
[ret appendString: @"\n)}"];
[ret makeImmutable];
objc_autoreleasePoolPop(pool);
return ret;
}
- (id)copy
{
return [self retain];
}
- (id)mutableCopy
{
return [[OFMutableSet alloc] initWithSet: self];
}
- (bool)isSubsetOfSet: (OFSet *)set
{
for (id object in self)
if (![set containsObject: object])
return false;
return true;
}
- (bool)intersectsSet: (OFSet *)set
{
for (id object in self)
if ([set containsObject: object])
return true;
return false;
}
- (OFSet *)setByAddingObjectsFromSet: (OFSet *)set
{
OFMutableSet *new = [[self mutableCopy] autorelease];
[new unionSet: set];
[new makeImmutable];
return new;
}
- (OFArray *)allObjects
{
void *pool = objc_autoreleasePoolPush();
OFArray *ret = [[[self objectEnumerator] allObjects] retain];
objc_autoreleasePoolPop(pool);
return [ret autorelease];
}
- (id)anyObject
{
void *pool = objc_autoreleasePoolPush();
id ret = [[[self objectEnumerator] nextObject] retain];
objc_autoreleasePoolPop(pool);
return [ret autorelease];
}
#ifdef OF_HAVE_BLOCKS
- (void)enumerateObjectsUsingBlock: (OFSetEnumerationBlock)block
{
bool stop = false;
for (id object in self) {
block(object, &stop);
if (stop)
break;
}
}
- (OFSet *)filteredSetUsingBlock: (OFSetFilterBlock)block
{
OFMutableSet *ret = [OFMutableSet set];
[self enumerateObjectsUsingBlock: ^ (id object, bool *stop) {
if (block(object))
[ret addObject: object];
}];
[ret makeImmutable];
return ret;
}
#endif
@end