Artifact 81553fcc1df81bbb25a8cad861da2f417c50af10f8a9f6800b2a807313b6dc0d:
- File
src/OFUUID.m
— part of check-in
[6ce0093f8d]
at
2023-04-10 19:22:32
on branch trunk
— Remove OFSerialization
While the idea sounds nice that the tag name is the class, this means the
serialization includes whether something is mutable or immutable. This means
doing as much as making something immutable changes the serialization, which
can then cause issues after being deserialized. (user: js, size: 4748) [annotate] [blame] [check-ins using] [more...]
/* * 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" #import "OFUUID.h" #import "OFArray.h" #import "OFString.h" #import "OFInvalidArgumentException.h" #import "OFInvalidFormatException.h" #import "OFOutOfRangeException.h" #define bytesSize 16 @implementation OFUUID + (instancetype)UUID { return [[[self alloc] init] autorelease]; } + (instancetype)UUIDWithUUIDBytes: (const unsigned char [16])bytes { return [[[self alloc] initWithUUIDBytes: bytes] autorelease]; } + (instancetype)UUIDWithUUIDString: (OFString *)string { return [[[self alloc] initWithUUIDString: string] 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; } - (instancetype)initWithUUIDBytes: (const unsigned char [16])bytes { self = [super init]; memcpy(_bytes, bytes, sizeof(_bytes)); return self; } static void decode(OFArray OF_GENERIC(OFString *) *components, size_t componentIndex, size_t componentLength, unsigned char *bytes, size_t *i) { void *pool = objc_autoreleasePoolPush(); OFString *component = [components objectAtIndex: componentIndex]; const char *cString; if (component.UTF8StringLength != componentLength) @throw [OFInvalidFormatException exception]; if (*i + componentLength / 2 > bytesSize) @throw [OFOutOfRangeException exception]; cString = component.UTF8String; for (size_t j = 0; j < componentLength; j += 2) { uint8_t value; if (cString[j] >= '0' && cString[j] <= '9') value = cString[j] - '0'; else if (cString[j] >= 'a' && cString[j] <= 'f') value = cString[j] - 'a' + 10; else if (cString[j] >= 'A' && cString[j] <= 'F') value = cString[j] - 'A' + 10; else @throw [OFInvalidFormatException exception]; value <<= 4; if (cString[j + 1] >= '0' && cString[j + 1] <= '9') value |= cString[j + 1] - '0'; else if (cString[j + 1] >= 'a' && cString[j + 1] <= 'f') value |= cString[j + 1] - 'a' + 10; else if (cString[j + 1] >= 'A' && cString[j + 1] <= 'F') value |= cString[j + 1] - 'A' + 10; else @throw [OFInvalidFormatException exception]; bytes[(*i)++] = value; } objc_autoreleasePoolPop(pool); } - (instancetype)initWithUUIDString: (OFString *)string { self = [super init]; @try { void *pool = objc_autoreleasePoolPush(); size_t i = 0; OFArray OF_GENERIC(OFString *) *components = [string componentsSeparatedByString: @"-"]; if (components.count != 5) @throw [OFInvalidFormatException exception]; decode(components, 0, 8, _bytes, &i); decode(components, 1, 4, _bytes, &i); decode(components, 2, 4, _bytes, &i); decode(components, 3, 4, _bytes, &i); decode(components, 4, 12, _bytes, &i); OFEnsure(i == 16); objc_autoreleasePoolPop(pool); } @catch (id e) { [self release]; @throw e; } 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++) OFHashAddByte(&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; } - (void)getUUIDBytes: (unsigned char [16])bytes { memcpy(bytes, _bytes, sizeof(_bytes)); } - (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