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NSNumber.m
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1174 lines (1019 loc) · 24.5 KB
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/** Implementation of NSNumber for GNUStep
Copyright (C) 2010 Free Software Foundation, Inc.
Written by: David Chisnall
Partial rewrite: Richard Frith-Macdonld <rfm@gnu.org>
(to compile on gnu/linux and mswindows,
to meet coding/style standards,
to restore lost functionality)
Date: February 2010
This file is part of the GNUstep Base Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110 USA.
*/
#import "common.h"
#if !defined(LLONG_MAX)
# if defined(__LONG_LONG_MAX__)
# define LLONG_MAX __LONG_LONG_MAX__
# define LLONG_MIN (-LLONG_MAX-1)
# define ULLONG_MAX (LLONG_MAX * 2ULL + 1)
# else
# error Neither LLONG_MAX nor __LONG_LONG_MAX__ found
# endif
#endif
#import "common.h"
#import "Foundation/NSCoder.h"
#import "Foundation/NSDecimalNumber.h"
#import "Foundation/NSException.h"
#import "Foundation/NSValue.h"
#if __has_include(<objc/runtime.h>)
# include <objc/runtime.h>
#endif
/*
* NSNumber implementation. This matches the behaviour of Apple's
* implementation. Values in the range -1 to 12 inclusive are mapped to
* singletons. All other values are mapped to the smallest signed value that
* will store them, unless they are greater than LLONG_MAX, in which case
* they are stored in an unsigned long long.
* Booleans are handled as a special case since some stuff (notably interface
* builder (nib) archives) needs to differentiate between booleans and integers.
*/
@interface NSSignedIntegerNumber : NSNumber
@end
@interface NSIntNumber : NSSignedIntegerNumber
{
@public
int value;
}
@end
/* Some code needs to differentiate between booleans and other NSNumber
* instances, so we need a special subclass to permit that.
*/
@interface NSBoolNumber : NSIntNumber
@end
@interface NSLongLongNumber : NSSignedIntegerNumber
{
@public
long long int value;
}
@end
@interface NSUnsignedLongLongNumber : NSNumber
{
@public
unsigned long long int value;
}
@end
// The value ivar in all of the concrete classes contains the real value.
#define VALUE value
#define COMPARE(value, other) \
if (value < other)\
{\
return NSOrderedAscending;\
}\
if (value > other)\
{\
return NSOrderedDescending;\
}\
return NSOrderedSame;
#define DCOMPARE(value, other) \
if (isnan(value)) \
{ \
if (isnan(other)) \
{ \
return NSOrderedSame; \
} \
else \
{ \
return NSOrderedAscending; \
} \
} \
else \
{ \
if (isnan(other)) \
{ \
if (value < 0.0) \
{ \
return NSOrderedAscending; \
} \
return NSOrderedDescending; \
} \
else if (value < other) \
{ \
return NSOrderedAscending; \
} \
else if (value > other) \
{ \
return NSOrderedDescending; \
} \
return NSOrderedSame; \
}
@implementation NSSignedIntegerNumber
- (NSComparisonResult) compare: (NSNumber*)aNumber
{
if (aNumber == self)
{
return NSOrderedSame;
}
if (aNumber == nil)
{
[NSException raise: NSInvalidArgumentException
format: @"nil argument for compare:"];
}
switch ([aNumber objCType][0])
{
/* For cases smaller than or equal to an int, we could get the int
* value and compare.
*/
case 'c':
case 'C':
case 's':
case 'S':
case 'i':
case 'I':
case 'l':
case 'L':
case 'q':
{
long long value = [self longLongValue];
long long other = [aNumber longLongValue];
COMPARE (value, other);
}
case 'Q':
{
unsigned long long other;
unsigned long long value;
long long v;
/* According to the C type promotion rules, we should cast this to
* an unsigned long long, however Apple's code does not do this.
* Instead, it performs a real comparison.
*/
v = [self longLongValue];
/* If this value is less than 0, then it is less than any value
* that can possibly be stored in an unsigned value.
*/
if (v < 0)
{
return NSOrderedAscending;
}
other = [aNumber unsignedLongLongValue];
value = (unsigned long long) v;
COMPARE (value, other);
}
case 'f':
case 'd':
{
double other = [aNumber doubleValue];
double value = [self doubleValue];
DCOMPARE(value, other)
}
default:
[NSException raise: NSInvalidArgumentException
format: @"unrecognised type for compare:"];
}
return 0; // Not reached.
}
@end
@implementation NSIntNumber
#define FORMAT @"%i"
#include "NSNumberMethods.h"
@end
@implementation NSBoolNumber
- (void) getValue: (void*)buffer
{
BOOL *ptr = (BOOL*)buffer;
*ptr = VALUE;
}
- (const char *) objCType
{
return @encode(BOOL);
}
@end
@implementation NSLongLongNumber
#define FORMAT @"%lli"
#include "NSNumberMethods.h"
@end
@implementation NSUnsignedLongLongNumber
#define FORMAT @"%llu"
#include "NSNumberMethods.h"
- (NSComparisonResult) compare: (NSNumber*)aNumber
{
if (aNumber == self)
{
return NSOrderedSame;
}
if (aNumber == nil)
{
[NSException raise: NSInvalidArgumentException
format: @"nil argument for compare:"];
}
switch ([aNumber objCType][0])
{
/* For cases smaller than or equal to an int, we could get the int
* value and compare.
*/
case 'c':
case 'C':
case 's':
case 'S':
case 'i':
case 'I':
case 'l':
case 'L':
case 'q':
{
long long other = [aNumber longLongValue];
if (other < 0)
{
return NSOrderedDescending;
}
COMPARE (value, ((unsigned long long) other));
}
case 'Q':
{
unsigned long long other = [aNumber unsignedLongLongValue];
COMPARE (value, other);
}
case 'f':
case 'd':
{
double other = [aNumber doubleValue];
double selfv = [self doubleValue];
DCOMPARE(selfv, other)
}
default:
[NSException raise: NSInvalidArgumentException
format: @"unrecognised type for compare:"];
}
return 0; // Not reached.
}
@end
/*
* Abstract superclass for floating point numbers.
*/
@interface NSFloatingPointNumber : NSNumber
@end
@implementation NSFloatingPointNumber
/* For floats, the type promotion rules say that we always promote to a
* floating point type, even if the other value is really an integer.
*/
- (BOOL) isEqualToNumber: (NSNumber*)aNumber
{
return ([self doubleValue] == [aNumber doubleValue]) ? YES : NO;
}
- (NSComparisonResult) compare: (NSNumber*)aNumber
{
double other;
double value;
if (aNumber == self)
{
return NSOrderedSame;
}
if (aNumber == nil)
{
[NSException raise: NSInvalidArgumentException
format: @"nil argument for compare:"];
}
other = [aNumber doubleValue];
value = [self doubleValue];
DCOMPARE(value, other)
}
@end
@interface NSFloatNumber : NSFloatingPointNumber
{
@public
float value;
}
@end
@implementation NSFloatNumber
#define FORMAT @"%0.7g"
#include "NSNumberMethods.h"
@end
@interface NSDoubleNumber : NSFloatingPointNumber
{
@public
double value;
}
@end
@implementation NSDoubleNumber
#define FORMAT @"%0.16g"
#include "NSNumberMethods.h"
@end
#ifdef OBJC_SMALL_OBJECT_SHIFT
static BOOL useSmallInt;
#if OBJC_SMALL_OBJECT_SHIFT == 3
static BOOL useSmallExtendedDouble;
static BOOL useSmallRepeatingDouble;
static BOOL useSmallFloat;
#endif
#define SMALL_INT_MASK 1
#define SMALL_EXTENDED_DOUBLE_MASK 2
#define SMALL_REPEATING_DOUBLE_MASK 3
// 4 is GSTinyString
#define SMALL_FLOAT_MASK 5
@interface NSSmallInt : NSSignedIntegerNumber
@end
@implementation NSSmallInt
#undef VALUE
#define VALUE (((intptr_t)self) >> OBJC_SMALL_OBJECT_SHIFT)
#define FORMAT @"%"PRIdPTR
#include "NSNumberMethods.h"
+ (void) load
{
useSmallInt = objc_registerSmallObjectClass_np(self, SMALL_INT_MASK);
}
+ (id) alloc
{
return (id)1;
}
+ (id) allocWithZone: (NSZone*)aZone
{
return (id)1;
}
- (id) copy
{
return self;
}
- (id) copyWithZone: (NSZone*)aZone
{
return self;
}
- (id) retain
{
return self;
}
- (NSUInteger) retainCount
{
return UINT_MAX;
}
- (id) autorelease
{
return self;
}
- (oneway void) release
{
return;
}
@end
#if OBJC_SMALL_OBJECT_SHIFT == 3
union BoxedDouble
{
id obj;
uintptr_t bits;
double d;
};
@interface NSSmallExtendedDouble : NSFloatingPointNumber
@end
@implementation NSSmallExtendedDouble
static double
unboxSmallExtendedDouble(uintptr_t boxed)
{
// The low bit of the mantissa
uintptr_t mask = boxed & 8;
union BoxedDouble ret;
// Clear the class pointer
boxed &= ~7;
ret.bits = boxed | (mask >> 1) | (mask >> 2) | (mask >> 3);
return ret.d;
}
static BOOL
isSmallExtendedDouble(double d)
{
union BoxedDouble b = {.d=d};
return unboxSmallExtendedDouble(b.bits) == d;
}
static double
unboxSmallRepeatingDouble(uintptr_t boxed)
{
// The low bit of the mantissa
uintptr_t mask = boxed & 56;
union BoxedDouble ret;
// Clear the class pointer
boxed &= ~7;
ret.bits = boxed | (mask >> 3);
return ret.d;
}
static BOOL
isSmallRepeatingDouble(double d)
{
union BoxedDouble b = {.d=d};
return unboxSmallRepeatingDouble(b.bits) == d;
}
static id
boxDouble(double d, uintptr_t mask)
{
union BoxedDouble b = {.d=d};
b.bits &= ~OBJC_SMALL_OBJECT_MASK;
b.bits |= mask;
return b.obj;
}
#undef VALUE
#define VALUE (unboxSmallExtendedDouble((uintptr_t)self))
#define FORMAT @"%0.16g"
#include "NSNumberMethods.h"
+ (void) load
{
useSmallExtendedDouble = objc_registerSmallObjectClass_np
(self, SMALL_EXTENDED_DOUBLE_MASK);
}
+ (id) alloc
{
return (id)SMALL_EXTENDED_DOUBLE_MASK;
}
+ (id) allocWithZone: (NSZone*)aZone
{
return (id)SMALL_EXTENDED_DOUBLE_MASK;
}
- (id) copy
{
return self;
}
- (id) copyWithZone: (NSZone*)aZone
{
return self;
}
- (id) retain
{
return self;
}
- (NSUInteger) retainCount
{
return UINT_MAX;
}
- (id) autorelease
{
return self;
}
- (oneway void) release
{
return;
}
@end
@interface NSSmallRepeatingDouble : NSFloatingPointNumber
@end
@implementation NSSmallRepeatingDouble
#undef VALUE
#define VALUE (unboxSmallRepeatingDouble((uintptr_t)self))
#define FORMAT @"%0.16g"
#include "NSNumberMethods.h"
+ (void) load
{
useSmallRepeatingDouble = objc_registerSmallObjectClass_np
(self, SMALL_REPEATING_DOUBLE_MASK);
}
+ (id) alloc
{
return (id)SMALL_REPEATING_DOUBLE_MASK;
}
+ (id) allocWithZone: (NSZone*)aZone
{
return (id)SMALL_REPEATING_DOUBLE_MASK;
}
- (id) copy
{
return self;
}
- (id) copyWithZone: (NSZone*)aZone
{
return self;
}
- (id) retain
{
return self;
}
- (NSUInteger) retainCount
{
return UINT_MAX;
}
- (id) autorelease
{
return self;
}
- (oneway void) release
{
return;
}
@end
/*
* Technically, all floats are small on 64bit and fit into a NSRepeatingDouble,
* but we want to get the description FORMAT right for floats (i.e. "%0.7g" and
* not "%0.16g".
*/
@interface NSSmallFloat : NSSmallRepeatingDouble
@end
@implementation NSSmallFloat
#undef VALUE
#define VALUE (unboxSmallRepeatingDouble((uintptr_t)self))
#define FORMAT @"%0.7g"
#include "NSNumberMethods.h"
+ (void) load
{
useSmallFloat = objc_registerSmallObjectClass_np
(self, SMALL_FLOAT_MASK);
}
+ (id) alloc
{
return (id)SMALL_FLOAT_MASK;
}
+ (id) allocWithZone: (NSZone*)aZone
{
return (id)SMALL_FLOAT_MASK;
}
@end
#endif
#endif
@implementation NSNumber
static Class NSNumberClass;
static Class NSBoolNumberClass;
static Class NSIntNumberClass;
static Class NSLongLongNumberClass;
static Class NSUnsignedLongLongNumberClass;
static Class NSFloatNumberClass;
static Class NSDoubleNumberClass;
/*
* Numbers from -1 to 12 inclusive that are reused.
*/
static NSNumber *ReusedInstances[14];
static NSBoolNumber *boolY; // Boolean YES (integer 1)
static NSBoolNumber *boolN; // Boolean NO (integer 0)
+ (void) initialize
{
int i;
if ([NSNumber class] != self)
{
return;
}
NSNumberClass = self;
NSBoolNumberClass = [NSBoolNumber class];
NSIntNumberClass = [NSIntNumber class];
NSLongLongNumberClass = [NSLongLongNumber class];
NSUnsignedLongLongNumberClass = [NSUnsignedLongLongNumber class];
NSFloatNumberClass = [NSFloatNumber class];
NSDoubleNumberClass = [NSDoubleNumber class];
boolY = NSAllocateObject(NSBoolNumberClass, 0, 0);
[[NSObject leakAt: &boolY] release];
boolY->value = 1;
boolN = NSAllocateObject(NSBoolNumberClass, 0, 0);
boolN->value = 0;
[[NSObject leakAt: &boolN] release];
for (i = 0; i < 14; i++)
{
NSIntNumber *n = NSAllocateObject(NSIntNumberClass, 0, 0);
n->value = i - 1;
ReusedInstances[i] = n;
[[NSObject leakAt: &ReusedInstances[i]] release];
}
}
- (const char *) objCType
{
/* All concrete NSNumber types must implement this so we know which one
* they are.
*/
[self subclassResponsibility: _cmd];
return NULL; // Not reached
}
- (BOOL) isEqualToNumber: (NSNumber*)aNumber
{
return ([self compare: aNumber] == NSOrderedSame) ? YES : NO;
}
- (BOOL) isEqual: (id)anObject
{
if ([anObject isKindOfClass: NSNumberClass])
{
return [self isEqualToNumber: anObject];
}
return [super isEqual: anObject];
}
- (BOOL) isEqualToValue: (NSValue*)aValue
{
if ([aValue isKindOfClass: NSNumberClass])
{
return [self isEqualToNumber: (NSNumber*)aValue];
}
return NO;
}
- (NSUInteger) hash
{
return (unsigned)[self doubleValue];
}
- (NSString*) stringValue
{
return [self descriptionWithLocale: nil];
}
- (NSString*) descriptionWithLocale: (id)aLocale
{
[self subclassResponsibility: _cmd];
return nil; // Not reached
}
- (NSComparisonResult) compare: (NSNumber*)aNumber
{
[self subclassResponsibility: _cmd];
return 0; // Not reached
}
#define INTEGER_MACRO(encoding,type, ignored, name) \
- (id) initWith ## name: (type)aValue \
{\
DESTROY(self);\
return [[NSNumberClass numberWith ## name: aValue] retain];\
}
#include "GSNumberTypes.h"
- (id) initWithBool: (BOOL)aValue
{
DESTROY(self);
return [(aValue == 0 ? boolN : boolY) retain];\
}
/*
* Macro for checking whether this value is the same as one of the singleton
* instances.
*/
#define CHECK_SINGLETON(aValue) \
if (aValue >= -1 && aValue <= 12)\
{\
return ReusedInstances[aValue+1];\
}
+ (NSNumber *) numberWithBool: (BOOL)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(BOOL)] autorelease];
}
if (0 == aValue)
{
return boolN;
}
return boolY;
}
+ (NSNumber *) numberWithChar: (signed char)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(signed char)] autorelease];
}
return [self numberWithInt: aValue];
}
+ (NSNumber *) numberWithUnsignedChar: (unsigned char)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(unsigned char)] autorelease];
}
return [self numberWithInt: aValue];
}
+ (NSNumber *) numberWithShort: (short)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(short)] autorelease];
}
return [self numberWithInt: aValue];
}
+ (NSNumber *) numberWithUnsignedShort: (unsigned short)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(unsigned short)] autorelease];
}
return [self numberWithInt: aValue];
}
+ (NSNumber *) numberWithInt: (int)aValue
{
NSIntNumber *n;
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(int)] autorelease];
}
CHECK_SINGLETON(aValue);
#ifdef OBJC_SMALL_OBJECT_SHIFT
if (useSmallInt
&& (aValue < (INT_MAX>>OBJC_SMALL_OBJECT_SHIFT))
&& (aValue > -(INT_MAX>>OBJC_SMALL_OBJECT_SHIFT)))
{
return (id)((((NSInteger)aValue) << OBJC_SMALL_OBJECT_SHIFT)
| SMALL_INT_MASK);
}
#endif
n = NSAllocateObject(NSIntNumberClass, 0, 0);
n->value = aValue;
return AUTORELEASE(n);
}
+ (NSNumber *) numberWithUnsignedInt: (unsigned int)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(unsigned int)] autorelease];
}
CHECK_SINGLETON(aValue);
if (aValue < (unsigned int) INT_MAX)
{
return [self numberWithInt: (int)aValue];
}
return [self numberWithLongLong: aValue];
}
+ (NSNumber *) numberWithLong: (long)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(long)] autorelease];
}
return [self numberWithLongLong: aValue];
}
+ (NSNumber *) numberWithUnsignedLong: (unsigned long)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(unsigned long)] autorelease];
}
return [self numberWithUnsignedLongLong: aValue];
}
+ (NSNumber *) numberWithLongLong: (long long)aValue
{
NSLongLongNumber *n;
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(long long)] autorelease];
}
CHECK_SINGLETON(aValue);
if (aValue < (long long)INT_MAX && aValue > (long long)INT_MIN)
{
return [self numberWithInt: (int) aValue];
}
n = NSAllocateObject(NSLongLongNumberClass, 0, 0);
n->value = aValue;
return AUTORELEASE(n);
}
+ (NSNumber *) numberWithUnsignedLongLong: (unsigned long long)aValue
{
NSUnsignedLongLongNumber *n;
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(unsigned long long)] autorelease];
}
if (aValue < (unsigned long long) LLONG_MAX)
{
return [self numberWithLongLong: (long long) aValue];
}
n = NSAllocateObject(NSUnsignedLongLongNumberClass, 0, 0);
n->value = aValue;
return AUTORELEASE(n);
}
+ (NSNumber *) numberWithFloat: (float)aValue
{
NSFloatNumber *n;
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(float)] autorelease];
}
#if OBJC_SMALL_OBJECT_SHIFT == 3
if (useSmallFloat)
{
return boxDouble(aValue, SMALL_FLOAT_MASK);
}
#endif
n = NSAllocateObject(NSFloatNumberClass, 0, 0);
n->value = aValue;
return AUTORELEASE(n);
}
+ (NSNumber *) numberWithDouble: (double)aValue
{
NSDoubleNumber *n;
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(double)] autorelease];
}
#if OBJC_SMALL_OBJECT_SHIFT == 3
if (useSmallRepeatingDouble && isSmallRepeatingDouble(aValue))
{
return boxDouble(aValue, SMALL_REPEATING_DOUBLE_MASK);
}
if (useSmallExtendedDouble && isSmallExtendedDouble(aValue))
{
return boxDouble(aValue, SMALL_EXTENDED_DOUBLE_MASK);
}
#endif
n = NSAllocateObject(NSDoubleNumberClass, 0, 0);
n->value = aValue;
return AUTORELEASE(n);
}
+ (NSNumber *) numberWithInteger: (NSInteger)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(NSInteger)] autorelease];
}
// Compile time constant; the compiler will remove this conditional
if (sizeof (NSInteger) == sizeof (int))
{
return [self numberWithInt: aValue];
}
return [self numberWithLongLong: aValue];
}
+ (NSNumber *) numberWithUnsignedInteger: (NSUInteger)aValue
{
if (self != NSNumberClass)
{
return [[[self alloc] initWithBytes: (const void *)&aValue
objCType: @encode(NSUInteger)] autorelease];
}
// Compile time constant; the compiler will remove this conditional
if (sizeof (NSUInteger) == sizeof (unsigned int))
{
return [self numberWithUnsignedInt: aValue];
}
return [self numberWithUnsignedLongLong: aValue];
}
- (id) initWithBytes: (const void *)
value objCType: (const char *)type
{
switch (type[0])
{
case 'c':
return [self initWithInteger: *(signed char *) value];
case 'C':
return [self initWithInteger: *(unsigned char *) value];
case 's':
return [self initWithInteger: *(short *) value];
case 'S':
return [self initWithInteger: *(unsigned short *) value];
case 'i':
return [self initWithInteger: *(int *) value];
case 'I':
return [self initWithInteger: *(unsigned int *) value];
case 'l':