Declaring fixed-size integer typedef in Standard C

Question

Is there a reliable way to declare typedefs for integer types of fixed 8,16,32, and 64 bit length in ISO Standard C?

When I say ISO Standard C, I mean that strictly:

Answer 1

Yes you can.

The header file limits.h should be part of C90. Then I would test through preprocessor directives values of SHRT_MAX, INT_MAX, LONG_MAX, and LLONG_MAX and set typedefs accordingly.

Example:

#include 

#if SHRT_MAX == 2147483647
typedef unsigned short int uint32_t;
#elif INT_MAX == 2147483647
typedef unsigned int uint32_t;
#elif LONG_MAX == 2147483647
typedef unsigned long uint32_t ;
#elif LLONG_MAX == 2147483647
typedef unsigned long long uint32_t;
#else
#error "Cannot find 32bit integer."
#endif