Add FastEnumeration to NSNumber

NSNumber+FastEnum.m

/*
inspired by ruby's 4.times {} method, created becasue I can and it was fun to do.
Usage: 
        for (NSNumber *i in @100)
        {
            NSLog(@"%@", i);
        }
*/

@interface NSNumber (FastEnum)<NSFastEnumeration>
@end


@implementation NSNumber (FastEnum)

- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(__unsafe_unretained id [])buffer count:(NSUInteger)len
{
    NSUInteger count = 0;
    if (state->state == 0)
    {
        // can't be nil but won't change
        state->mutationsPtr = &state->extra[0];
        state->extra[1] = labs([self longValue]);
        state->extra[2] = [self longValue] < 0; // is negative
    }
    if (state->state < state->extra[1])
    {
        state->itemsPtr = buffer;
        while((state->state < state->extra[1]) && (count < len))
        {
            long num = state->extra[2] ? -state->state : state->state;
            buffer[count] = @(num);
            state->state++;
            count++;
        }
        
    }
    return count;
}
@end