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/*
 * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
 * Copyright (c) 2008-2024 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.
 */

#define OF_NUMBER_M

#include "config.h"

#include <math.h>

#import "OFNumber.h"
#import "OFString.h"
#import "OFXMLElement.h"
#import "OFXMLAttribute.h"
#import "OFData.h"
#import "OFConcreteNumber.h"
#import "OFData.h"
#import "OFString.h"
#import "OFTaggedPointerNumber.h"

#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfRangeException.h"

@interface OFNumber ()
+ (instancetype)of_alloc;
- (OFString *)
    of_JSONRepresentationWithOptions: (OFJSONRepresentationOptions)options
			       depth: (size_t)depth;
@end

@interface OFNumberPlaceholder: OFNumber
@interface OFPlaceholderNumber: OFNumber
@end

@interface OFNumberSingleton: OFNumber
@interface OFConcreteNumberSingleton: OFConcreteNumber
@end

#ifdef OF_OBJFW_RUNTIME
enum Tag {
	tagChar,
	tagShort,
	tagInt,
	tagLong,
	tagLongLong,
	tagUnsignedChar,
	tagUnsignedShort,
	tagUnsignedInt,
	tagUnsignedLong,
	tagUnsignedLongLong,
};
static const uint_fast8_t tagBits = 4;
static const uintptr_t tagMask = 0xF;

@interface OFTaggedPointerNumber: OFNumberSingleton
@end
#endif

static struct {
	Class isa;
} placeholder;

#define SINGLETON(var, sel, val)				\
	static OFNumberSingleton *var;				\
								\
	static void						\
	var##Init(void)						\
	{							\
		var = [[OFNumberSingleton alloc] sel val];	\
#define SINGLETON(var, sel, val)					\
	static OFConcreteNumberSingleton *var;				\
									\
	static void							\
	var##Init(void)							\
	{								\
		var = [[OFConcreteNumberSingleton alloc] sel val];	\
	}
SINGLETON(falseNumber, initWithBool:, false)
SINGLETON(trueNumber, initWithBool:, true)
SINGLETON(charZeroNumber, initWithChar:, 0)
SINGLETON(shortZeroNumber, initWithShort:, 0)
SINGLETON(intZeroNumber, initWithInt:, 0)
SINGLETON(longZeroNumber, initWithLong:, 0)
SINGLETON(longLongZeroNumber, initWithLongLong:, 0)
SINGLETON(unsignedCharZeroNumber, initWithUnsignedChar:, 0)
SINGLETON(unsignedShortZeroNumber, initWithUnsignedShort:, 0)
SINGLETON(unsignedIntZeroNumber, initWithUnsignedInt:, 0)
SINGLETON(unsignedLongZeroNumber, initWithUnsignedLong:, 0)
SINGLETON(unsignedLongLongZeroNumber, initWithUnsignedLongLong:, 0)
SINGLETON(floatZeroNumber, initWithFloat:, 0)
SINGLETON(doubleZeroNumber, initWithDouble:, 0)
#undef SINGLETON

#ifdef OF_OBJFW_RUNTIME
static int numberTag;
#endif

static bool
isUnsigned(OFNumber *number)
{
	switch (*number.objCType) {
	case 'B':
		return true;
	case 'C':
		return true;
	case 'S':
		return true;
	case 'I':
		return true;
	case 'L':
		return true;
	case 'Q':
		return true;
	default:
		return false;
	}
}

static bool
isSigned(OFNumber *number)
{
	switch (*number.objCType) {
	case 'c':
		return true;
	case 's':
		return true;
	case 'i':
		return true;
	case 'l':
		return true;
	case 'q':
		return true;
	default:
		return false;
	}
}

static bool
isFloat(OFNumber *number)
{
	switch (*number.objCType) {
	case 'f':
		return true;
	case 'd':
		return true;
	default:
		return false;
	}
}

@implementation OFNumberPlaceholder
@implementation OFPlaceholderNumber
- (instancetype)initWithBool: (bool)value
{
	if (value) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, trueNumberInit);
		return (id)trueNumber;
	} else {
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- (instancetype)initWithChar: (signed char)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, charZeroNumberInit);
		return (id)charZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if ((unsigned char)value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
		    ((uintptr_t)(unsigned char)value << tagBits) | tagChar);
	} else if ((unsigned char)value <=
	    (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithChar: value];

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithChar: value];
	return (id)[[OFConcreteNumber alloc] initWithChar: value];
}

- (instancetype)initWithShort: (short)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, shortZeroNumberInit);
		return (id)shortZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if ((unsigned short)value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
		    ((uintptr_t)(unsigned short)value << tagBits) | tagShort);
	} else if ((unsigned short)value <=
	    (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithShort: value];

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithShort: value];
	return (id)[[OFConcreteNumber alloc] initWithShort: value];
}

- (instancetype)initWithInt: (int)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, intZeroNumberInit);
		return (id)intZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if ((unsigned int)value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
		    ((uintptr_t)(unsigned int)value << tagBits) | tagInt);
	} else if ((unsigned int)value <=
	    (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithInt: value];

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithInt: value];
	return (id)[[OFConcreteNumber alloc] initWithInt: value];
}

- (instancetype)initWithLong: (long)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, longZeroNumberInit);
		return (id)longZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if ((unsigned long)value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
		    ((uintptr_t)(unsigned long)value << tagBits) | tagLong);
	} else if ((unsigned long)value <=
	    (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithLong: value];

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithLong: value];
	return (id)[[OFConcreteNumber alloc] initWithLong: value];
}

- (instancetype)initWithLongLong: (long long)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, longLongZeroNumberInit);
		return (id)longLongZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if ((unsigned long long)value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
	} else if ((unsigned long long)value <=
	    (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		    ((uintptr_t)(unsigned long long)value << tagBits) |
		    tagLongLong);
		id ret = [OFTaggedPointerNumber numberWithLongLong: value];

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithLongLong: value];
	return (id)[[OFConcreteNumber alloc] initWithLongLong: value];
}

- (instancetype)initWithUnsignedChar: (unsigned char)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, unsignedCharZeroNumberInit);
		return (id)unsignedCharZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if (value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
	} else if (value <= (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithUnsignedChar: value];
		    ((uintptr_t)value << tagBits) | tagUnsignedChar);

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithUnsignedChar: value];
	return (id)[[OFConcreteNumber alloc] initWithUnsignedChar: value];
}

- (instancetype)initWithUnsignedShort: (unsigned short)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, unsignedShortZeroNumberInit);
		return (id)unsignedShortZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if (value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
	} else if (value <= (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithUnsignedShort: value];
		    ((uintptr_t)value << tagBits) | tagUnsignedShort);

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithUnsignedShort: value];
	return (id)[[OFConcreteNumber alloc] initWithUnsignedShort: value];
}

- (instancetype)initWithUnsignedInt: (unsigned int)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, unsignedIntZeroNumberInit);
		return (id)unsignedIntZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if (value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
	} else if (value <= (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithUnsignedInt: value];
		    ((uintptr_t)value << tagBits) | tagUnsignedInt);

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithUnsignedInt: value];
	return (id)[[OFConcreteNumber alloc] initWithUnsignedInt: value];
}

- (instancetype)initWithUnsignedLong: (unsigned long)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, unsignedLongZeroNumberInit);
		return (id)unsignedLongZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if (value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
	} else if (value <= (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber numberWithUnsignedLong: value];
		    ((uintptr_t)value << tagBits) | tagUnsignedLong);

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithUnsignedLong: value];
	return (id)[[OFConcreteNumber alloc] initWithUnsignedLong: value];
}

- (instancetype)initWithUnsignedLongLong: (unsigned long long)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, unsignedLongLongZeroNumberInit);
		return (id)unsignedLongLongZeroNumber;
#ifdef OF_OBJFW_RUNTIME
	} else if (value <= (UINTPTR_MAX >> tagBits)) {
		id ret = objc_createTaggedPointer(numberTag,
		    ((uintptr_t)value << tagBits) | tagUnsignedLongLong);
	} else if (value <= (UINTPTR_MAX >> OFTaggedPointerNumberTagBits)) {
		id ret = [OFTaggedPointerNumber
		    numberWithUnsignedLongLong: value];

		if (ret != nil)
			return ret;
#endif
	}

	return (id)[[OFNumber of_alloc] initWithUnsignedLongLong: value];
	return (id)[[OFConcreteNumber alloc] initWithUnsignedLongLong: value];
}

- (instancetype)initWithFloat: (float)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, floatZeroNumberInit);
		return (id)floatZeroNumber;
	}

	return (id)[[OFNumber of_alloc] initWithFloat: value];
	return (id)[[OFConcreteNumber alloc] initWithFloat: value];
}

- (instancetype)initWithDouble: (double)value
{
	if (value == 0) {
		static OFOnceControl onceControl = OFOnceControlInitValue;
		OFOnce(&onceControl, doubleZeroNumberInit);
		return (id)doubleZeroNumber;
	}

	return (id)[[OFNumber of_alloc] initWithDouble: value];
	return (id)[[OFConcreteNumber alloc] initWithDouble: value];
}

- (instancetype)initWithSerialization: (OFXMLElement *)element
{
	return (id)[[OFNumber of_alloc] initWithSerialization: element];
}
#ifdef __clang__
# pragma clang diagnostic pop
#endif
@end

@implementation OFNumberSingleton
- (instancetype)autorelease
{
	return self;
}

OF_SINGLETON_METHODS
- (instancetype)retain
{
	return self;
}

- (void)release
{
}

- (unsigned int)retainCount
{
	return OFMaxRetainCount;
}
@end

#ifdef OF_OBJFW_RUNTIME
@implementation OFTaggedPointerNumber
@implementation OFConcreteNumberSingleton
- (const char *)objCType
{
	uintptr_t value = object_getTaggedPointerValue(self);

OF_SINGLETON_METHODS
	switch (value & tagMask) {
	case tagChar:
		return @encode(signed char);
	case tagShort:
		return @encode(short);
	case tagInt:
		return @encode(int);
	case tagLong:
		return @encode(long);
	case tagLongLong:
		return @encode(long long);
	case tagUnsignedChar:
		return @encode(unsigned char);
	case tagUnsignedShort:
		return @encode(unsigned short);
	case tagUnsignedInt:
		return @encode(unsigned int);
	case tagUnsignedLong:
		return @encode(unsigned long);
	case tagUnsignedLongLong:
		return @encode(unsigned long long);
	default:
		@throw [OFInvalidArgumentException exception];
	}
}

# define RETURN_VALUE							  \
	uintptr_t value = object_getTaggedPointerValue(self);		  \
									  \
	switch (value & tagMask) {					  \
	case tagChar:							  \
		return (signed char)(unsigned char)(value >> tagBits);	  \
	case tagShort:							  \
		return (short)(unsigned short)(value >> tagBits);	  \
	case tagInt:							  \
		return (int)(unsigned int)(value >> tagBits);		  \
	case tagLong:							  \
		return (long)(unsigned long)(value >> tagBits);		  \
	case tagLongLong:						  \
		return (long long)(unsigned long long)(value >> tagBits); \
	case tagUnsignedChar:						  \
		return (unsigned char)(value >> tagBits);		  \
	case tagUnsignedShort:						  \
		return (unsigned short)(value >> tagBits);		  \
	case tagUnsignedInt:						  \
		return (unsigned int)(value >> tagBits);		  \
	case tagUnsignedLong:						  \
		return (unsigned long)(value >> tagBits);		  \
	case tagUnsignedLongLong:					  \
		return (unsigned long long)(value >> tagBits);		  \
	default:							  \
		@throw [OFInvalidArgumentException exception];		  \
	}
- (long long)longLongValue
{
	RETURN_VALUE
}

- (unsigned long long)unsignedLongLongValue
{
	RETURN_VALUE
}

- (double)doubleValue
{
	RETURN_VALUE
}
@end
# undef RETURN_VALUE
#endif

@implementation OFNumber
+ (void)initialize
{
	if (self != [OFNumber class])
	if (self == [OFNumber class])
		return;

		object_setClass((id)&placeholder, [OFPlaceholderNumber class]);
	placeholder.isa = [OFNumberPlaceholder class];

#ifdef OF_OBJFW_RUNTIME
	numberTag =
	    objc_registerTaggedPointerClass([OFTaggedPointerNumber class]);
#endif
}

+ (instancetype)of_alloc
{
	return [super alloc];
}

+ (instancetype)alloc
{
	if (self == [OFNumber class])
		return (id)&placeholder;

	return [super alloc];
}

+ (instancetype)valueWithBytes: (const void *)bytes
		      objCType: (const char *)objCType
{
	OF_UNRECOGNIZED_SELECTOR
}

+ (instancetype)valueWithPointer: (const void *)pointer
{
	OF_UNRECOGNIZED_SELECTOR
}

+ (instancetype)valueWithNonretainedObject: (id)object
{
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}

+ (instancetype)numberWithDouble: (double)value
{
	return [[[self alloc] initWithDouble: value] autorelease];
}

- (instancetype)init
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)initWithBytes: (const void *)bytes
		     objCType: (const char *)objCType
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)initWithBool: (bool)value
{
	self = [super init];

	return [self initWithBytes: &value objCType: @encode(bool)];
	_value.unsigned_ = value;
	_typeEncoding = @encode(bool);

	return self;
}

- (instancetype)initWithChar: (signed char)value
{
	self = [super init];

	_value.signed_ = value;
	_typeEncoding = @encode(signed char);
	return [self initWithBytes: &value objCType: @encode(signed char)];

	return self;
}

- (instancetype)initWithShort: (short)value
{
	self = [super init];

	return [self initWithBytes: &value objCType: @encode(short)];
	_value.signed_ = value;
	_typeEncoding = @encode(short);

	return self;
}

- (instancetype)initWithInt: (int)value
{
	self = [super init];

	return [self initWithBytes: &value objCType: @encode(int)];
	_value.signed_ = value;
	_typeEncoding = @encode(int);

	return self;
}

- (instancetype)initWithLong: (long)value
{
	self = [super init];

	return [self initWithBytes: &value objCType: @encode(long)];
	_value.signed_ = value;
	_typeEncoding = @encode(long);

	return self;
}

- (instancetype)initWithLongLong: (long long)value
{
	self = [super init];

	_value.signed_ = value;
	_typeEncoding = @encode(long long);
	return [self initWithBytes: &value objCType: @encode(long long)];

	return self;
}

- (instancetype)initWithUnsignedChar: (unsigned char)value
{
	self = [super init];

	return [self initWithBytes: &value objCType: @encode(unsigned char)];
	_value.unsigned_ = value;
	_typeEncoding = @encode(unsigned long);

	return self;
}

- (instancetype)initWithUnsignedShort: (unsigned short)value
{
	self = [super init];

	_value.unsigned_ = value;
	_typeEncoding = @encode(unsigned short);
	return [self initWithBytes: &value objCType: @encode(unsigned short)];

	return self;
}

- (instancetype)initWithUnsignedInt: (unsigned int)value
{
	self = [super init];

	_value.unsigned_ = value;
	_typeEncoding = @encode(unsigned int);
	return [self initWithBytes: &value objCType: @encode(unsigned int)];

	return self;
}

- (instancetype)initWithUnsignedLong: (unsigned long)value
{
	self = [super init];

	_value.unsigned_ = value;
	_typeEncoding = @encode(unsigned long);

	return [self initWithBytes: &value objCType: @encode(unsigned long)];
}
	return self;
}


- (instancetype)initWithUnsignedLongLong: (unsigned long long)value
{
	self = [super init];

	return [self initWithBytes: &value
	_value.unsigned_ = value;
	_typeEncoding = @encode(unsigned long long);

			  objCType: @encode(unsigned long long)];
}
	return self;
}


- (instancetype)initWithPtrDiff: (ptrdiff_t)value
{
	self = [super init];

	_value.signed_ = value;
	_typeEncoding = @encode(ptrdiff_t);

	return self;
}

- (instancetype)initWithIntPtr: (intptr_t)value
{
	self = [super init];

	_value.signed_ = value;
	_typeEncoding = @encode(intptr_t);

	return self;
}

- (instancetype)initWithUIntPtr: (uintptr_t)value
{
	self = [super init];

	_value.unsigned_ = value;
	_typeEncoding = @encode(uintptr_t);

	return self;
}

- (instancetype)initWithFloat: (float)value
{
	self = [super init];

	return [self initWithBytes: &value objCType: @encode(float)];
	_value.float_ = value;
	_typeEncoding = @encode(float);

	return self;
}

- (instancetype)initWithDouble: (double)value
{
	self = [super init];

	_value.float_ = value;
	_typeEncoding = @encode(double);

	return self;
}

- (instancetype)initWithSerialization: (OFXMLElement *)element
{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();
		OFString *typeString;

		if (![element.name isEqual: @"OFNumber"] ||
		    ![element.namespace isEqual: OFSerializationNS])
			@throw [OFInvalidArgumentException exception];

		typeString = [element attributeForName: @"type"].stringValue;

		if ([typeString isEqual: @"bool"]) {
			OFString *stringValue = element.stringValue;
			if ([stringValue isEqual: @"true"])
				self = [self initWithBool: true];
	return [self initWithBytes: &value objCType: @encode(double)];
			else if ([stringValue isEqual: @"false"])
				self = [self initWithBool: false];
			else
				@throw [OFInvalidArgumentException exception];
		} else if ([typeString isEqual: @"float"]) {
			unsigned long long value =
			    [element unsignedLongLongValueWithBase: 16];

}
			if (value > UINT64_MAX)
				@throw [OFOutOfRangeException exception];

			self = [self initWithDouble: OFFromBigEndianDouble(
			    OFRawUInt64ToDouble(OFToBigEndian64(value)))];
		} else if ([typeString isEqual: @"signed"])
			self = [self initWithLongLong: element.longLongValue];
		else if ([typeString isEqual: @"unsigned"])
			self = [self initWithUnsignedLongLong:
			    element.unsignedLongLongValue];
		else
			@throw [OFInvalidArgumentException exception];

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (const char *)objCType
{
	return _typeEncoding;
}

- (void)getValue: (void *)value size: (size_t)size
{
	switch (*self.objCType) {
#define CASE(enc, type, property)					\
	case enc: {							\
		type tmp = (type)self.property;				\
									\
		if (size != sizeof(type))				\
			@throw [OFOutOfRangeException exception];	\
									\
		memcpy(value, &tmp, size);				\
		break;							\
	}
	CASE('B', bool, unsignedLongLongValue)
	CASE('c', signed char, longLongValue)
	CASE('s', short, longLongValue)
	CASE('i', int, longLongValue)
	CASE('l', long, longLongValue)
	CASE('q', long long, longLongValue)
	CASE('C', unsigned char, unsignedLongLongValue)
	CASE('S', unsigned short, unsignedLongLongValue)
	CASE('I', unsigned int, unsignedLongLongValue)
	CASE('L', unsigned long, unsignedLongLongValue)
	CASE('Q', unsigned long long, unsignedLongLongValue)
	CASE('f', float, doubleValue)
	CASE('d', double, doubleValue)
#undef CASE
	default:
		@throw [OFInvalidFormatException exception];
	}
}

- (long long)longLongValue
{
	if (isFloat(self))
		return _value.float_;
	else if (isSigned(self))
		return _value.signed_;
	else if (isUnsigned(self))
		return _value.unsigned_;
	else
		@throw [OFInvalidFormatException exception];
	OF_UNRECOGNIZED_SELECTOR
}

- (unsigned long long)unsignedLongLongValue
{
	if (isFloat(self))
	OF_UNRECOGNIZED_SELECTOR
		return _value.float_;
	else if (isSigned(self))
		return _value.signed_;
	else if (isUnsigned(self))
		return _value.unsigned_;
	else
		@throw [OFInvalidFormatException exception];
}

- (double)doubleValue
{
	if (isFloat(self))
	OF_UNRECOGNIZED_SELECTOR
		return _value.float_;
	else if (isSigned(self))
		return _value.signed_;
	else if (isUnsigned(self))
		return _value.unsigned_;
	else
		@throw [OFInvalidFormatException exception];
}

- (bool)boolValue
{
	return (bool)self.unsignedLongLongValue;
}

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+












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- (OFString *)description
{
	return [self stringValue];
}

- (OFString *)stringValue
{
	if (*self.objCType == 'B')
	if (self.objCType[0] == 'B' && self.objCType[1] == '\0')
		return (self.boolValue ? @"true" : @"false");
	if (isFloat(self))
		return [OFString stringWithFormat: @"%g", self.doubleValue];
	if (isSigned(self))
		return [OFString stringWithFormat: @"%lld", self.longLongValue];
	if (isUnsigned(self))
		return [OFString stringWithFormat: @"%llu",
						   self.unsignedLongLongValue];

	@throw [OFInvalidFormatException exception];
}

- (OFXMLElement *)XMLElementBySerializing
{
	void *pool = objc_autoreleasePoolPush();
	OFXMLElement *element;

	element = [OFXMLElement elementWithName: @"OFNumber"
				      namespace: OFSerializationNS
				    stringValue: self.description];

	if (*self.objCType == 'B')
		[element addAttributeWithName: @"type" stringValue: @"bool"];
	else if (isFloat(self)) {
		[element addAttributeWithName: @"type" stringValue: @"float"];
		element.stringValue = [OFString
		    stringWithFormat: @"%016" PRIx64,
		    OFFromBigEndian64(OFDoubleToRawUInt64(OFToBigEndianDouble(
		    self.doubleValue)))];
	} else if (isSigned(self))
		[element addAttributeWithName: @"type" stringValue: @"signed"];
	else if (isUnsigned(self))
		[element addAttributeWithName: @"type"
				  stringValue: @"unsigned"];
	else
		@throw [OFInvalidFormatException exception];

	[element retain];

	objc_autoreleasePoolPop(pool);

	return [element autorelease];
}

- (OFString *)JSONRepresentation
{
	return [self of_JSONRepresentationWithOptions: 0 depth: 0];
}

- (OFString *)JSONRepresentationWithOptions:
    (OFJSONRepresentationOptions)options
{
	return [self of_JSONRepresentationWithOptions: options depth: 0];
}

- (OFString *)
    of_JSONRepresentationWithOptions: (OFJSONRepresentationOptions)options
			       depth: (size_t)depth
{
	double doubleValue;

	if (*self.objCType == 'B')
	if (self.objCType[0] == 'B' && self.objCType[1] == '\0')
		return (self.boolValue ? @"true" : @"false");

	doubleValue = self.doubleValue;
	if (isinf(doubleValue)) {
		if (options & OFJSONRepresentationOptionJSON5) {
			if (doubleValue > 0)
				return @"Infinity";
			else
				return @"-Infinity";
		} else
			@throw [OFInvalidArgumentException exception];
	}

	return self.description;
}

- (OFData *)messagePackRepresentation
{
	OFMutableData *data;
	const char *typeEncoding = self.objCType;

	if (typeEncoding[0] == '\0' || typeEncoding[1] != '\0')
		@throw [OFInvalidFormatException exception];

	if (*typeEncoding == 'B') {
		uint8_t type = (self.boolValue ? 0xC3 : 0xC2);
		data = [OFMutableData dataWithItems: &type count: 1];
	} else if (*typeEncoding == 'f') {
		uint8_t type = 0xCA;
		float tmp = OFToBigEndianFloat(self.floatValue);