What is a portable method to find the maximum value of size_t? What is a portable method to find the maximum value of size_t? c c

What is a portable method to find the maximum value of size_t?


c size-t

A manifest constant (a macro) exists in C99 and it is called SIZE_MAX. There's no such constant in C89/90 though.

However, what you have in your original post is a perfectly portable method of finding the maximum value of size_t. It is guaranteed to work with any unsigned type.

c size-t 

#define MAZ_SZ (~(size_t)0)

or SIZE_MAX

c size-t

As an alternative to bit-operations suggested in the other answers, you could do this in C++ 

#include <limits>size_t maxvalue = std::numeric_limits<size_t>::max()

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