/*
* 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.
*
* 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 "OFUUID.h"
#import "OFString.h"
#import "OFInvalidArgumentException.h"
@implementation OFUUID
+ (instancetype)UUID
{
return [[[self alloc] init] autorelease];
}
- (instancetype)init
{
uint64_t r;
self = [super init];
r = OFRandom64();
memcpy(_bytes, &r, 8);
r = OFRandom64();
memcpy(_bytes + 8, &r, 8);
_bytes[6] &= ~((1 << 7) | (1 << 5) | (1 << 4));
_bytes[6] |= (1 << 6);
_bytes[8] &= ~(1 << 6);
_bytes[8] |= (1 << 7);
return self;
}
- (bool)isEqual: (id)object
{
OFUUID *UUID;
if (![object isKindOfClass: [OFUUID class]])
return false;
UUID = object;
return (memcmp(_bytes, UUID->_bytes, sizeof(_bytes)) == 0);
}
- (unsigned long)hash
{
unsigned long hash;
OFHashInit(&hash);
for (size_t i = 0; i < sizeof(_bytes); i++)
OFHashAdd(&hash, _bytes[i]);
OFHashFinalize(&hash);
return hash;
}
- (id)copy
{
return [self retain];
}
- (OFComparisonResult)compare: (OFUUID *)UUID
{
int comparison;
if (![UUID isKindOfClass: [OFUUID class]])
@throw [OFInvalidArgumentException exception];
if ((comparison = memcmp(_bytes, UUID->_bytes, sizeof(_bytes))) == 0)
return OFOrderedSame;
if (comparison > 0)
return OFOrderedDescending;
else
return OFOrderedAscending;
}
- (OFString *)UUIDString
{
return [OFString stringWithFormat:
@"%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-"
@"%02X%02X%02X%02X%02X%02X",
_bytes[0], _bytes[1], _bytes[2], _bytes[3],
_bytes[4], _bytes[5], _bytes[6], _bytes[7],
_bytes[8], _bytes[9], _bytes[10], _bytes[11],
_bytes[12], _bytes[13], _bytes[14], _bytes[15]];
}
- (OFString *)description
{
return self.UUIDString;
}
@end