NSNumber(OOExtensions) Category Reference

#include <NSNumberOOExtensions.h>

Instance Methods
(BOOL)	- oo_isFloatingPointNumber
(BOOL)	- oo_isBoolean

Detailed Description

Definition at line 33 of file NSNumberOOExtensions.h.

Method Documentation

oo_isBoolean

- (BOOL) oo_isBoolean

Definition at line 1 of file NSNumberOOExtensions.m.

{
    /*  There's no explicit way to test this. However, on Mac OS X boolean
        NSNumbers are required to be constant objects because they're toll-
        free bridged with kCFBooleanTrue and kCFBooleanFalse, so comparison to
        those values has to work.
        
        In GNUstep, constant objects are also used, because they're not about
        to miss such an obvious optimization.
    */
    
#if __COREFOUNDATION_CFNUMBER__
    return self == (NSNumber *)kCFBooleanTrue || self == (NSNumber *)kCFBooleanFalse;
#else
    static NSNumber *sTrue = nil, *sFalse;
    if (EXPECT_NOT(sTrue == nil))
    {
        sTrue = [[NSNumber numberWithBool:YES] retain];
        sFalse = [[NSNumber numberWithBool:NO] retain];
    }
    return self == sTrue || self == sFalse;
#endif
}

oo_isFloatingPointNumber

- (BOOL) oo_isFloatingPointNumber

Definition at line 1 of file NSNumberOOExtensions.m.

{
#if __COREFOUNDATION_CFNUMBER__
    return CFNumberIsFloatType((CFNumberRef)self);
#else
    /*  This happily assumes the compiler will inline strcmp() where one
        argument is a single-character constant string. Verified under
        apple-gcc 4.0 (even with -O0).
    */
    const char *type = [self objCType];
    return (strcmp(type, @encode(double)) == 0 || strcmp(type, @encode(float)) == 0);
#endif
}

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The documentation for this category was generated from the following files:

• src/Core/NSNumberOOExtensions.h
• src/Core/NSNumberOOExtensions.m