CODEWITHSUNDEEP
c++c
Tiago Costa
Tiago Costa

Reputation: 4251

C++ U32 type header

I want to use U32 type but I can't find the header where it is defined. Does anyone know?

Upvotes: 3

Views: 34737

Answers (3)

Seth Carnegie
Seth Carnegie

Reputation: 75130

There is no standard type called U32, but if you #include <cstdint> (stdint.h for C) you can use std::uint32_t1, a 32 bit unsigned integer, which is (I assume) what you want.

Here is a list of types in the cstdint header:

namespace std {
    int8_t
    int16_t
    int32_t
    int64_t
    int_fast8_t
    int_fast16_t
    int_fast32_t
    int_fast64_t
    int_least8_t
    int_least16_t
    int_least32_t
    int_least64_t
    intmax_t
    intptr_t
    uint8_t
    uint16_t
    uint32_t
    uint64_t
    uint_fast8_t
    uint_fast16_t
    uint_fast32_t
    uint_fast64_t
    uint_least8_t
    uint_least16_t
    uint_least32_t
    uint_least64_t
    uintmax_t
    uintptr_t
}

1 Thanks Martinho Fernandes for pointing out that these types are in the namespace std.

Upvotes: 16

user46748
user46748

Reputation: 155

U32 is an idiomatic shortcut for an unsigned int. Its common definition is:

typedef unsigned int U32;

But the main reason for its use is to be able to control the actual definition manually. Hope this helps.

Upvotes: 2

Kornel Kisielewicz
Kornel Kisielewicz

Reputation: 57555

While cstdint might be a solution, it's not universal -- MSVC versions before 2010 didn't ship with that one. If writing for multiple platforms you'll need to supply the standard types yourself if MSVC < 2010 is detected. Or use the boost one if you use boost.

Upvotes: 2

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