How would you define a simple “min” method in obj-c

Question

I want to define a min and max methods in a Utils class.

@interface Utils

int min(int a, int b);
int max(int a, int b);

@end

But I don\'t

Answer 1

Here is a macro I created for multi-max and multi-min which allows more than just 2 inputs.

float a = MMAX(1,2,9.33,2.5); //a = 9.33

The internal mechanisms use long double and you'll just cast the output to whatever variable you're using. I'd prefer a solution using typeof but couldn't figure out how to do it on __VA_ARGS__ on a per argument basis, maybe someone more versed than me in C can figure it out and comment? Anyways, here's the macro definition:

---

#define MMAX(...) ({\
long double __inputs[(sizeof((long double[]){__VA_ARGS__})/sizeof(long double))] = {__VA_ARGS__};\
long double __maxValue = __inputs[0];\
for (int __i = 0; __i < (sizeof((long double[]){__VA_ARGS__})/sizeof(long double)); ++__i) {\
long double __inputValue = __inputs[__i];\
__maxValue = __maxValue>__inputValue?__maxValue:__inputValue;\
}\
__maxValue;\
})

#define MMIN(...) ({\
long double __inputs[(sizeof((long double[]){__VA_ARGS__})/sizeof(long double))] = {__VA_ARGS__};\
long double __minValue = __inputs[0];\
for (int __i = 0; __i < (sizeof((long double[]){__VA_ARGS__})/sizeof(long double)); ++__i) {\
long double __inputValue = __inputs[__i];\
__minValue = __minValue<__inputValue?__minValue:__inputValue;\
}\
__minValue;\
})