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Standard library header <cstdint>

From cppreference.com
< cpp‎ | header

This header was originally in the C standard library as <stdint.h>.

This header is part of the type support library, providing fixed width integer types and part of C numeric limits interface.

Contents

[edit] Types

int8_t
int16_t
int32_t
int64_t
signed integer type with width of
exactly 8, 16, 32 and 64 bits respectively
with no padding bits and using 2's complement for negative values
(provided if and only if the implementation directly supports the type)
(typedef)
int_fast8_t
int_fast16_t
int_fast32_t
int_fast64_t
fastest signed integer type with width of
at least 8, 16, 32 and 64 bits respectively
(typedef)
int_least8_t
int_least16_t
int_least32_t
int_least64_t
smallest signed integer type with width of
at least 8, 16, 32 and 64 bits respectively
(typedef)
intmax_t
maximum width integer type
(typedef)
intptr_t
(optional)
integer type capable of holding a pointer
(typedef)
uint8_t
uint16_t
uint32_t
uint64_t
unsigned integer type with width of
exactly 8, 16, 32 and 64 bits respectively
(provided if and only if the implementation directly supports the type)
(typedef)
uint_fast8_t
uint_fast16_t
uint_fast32_t
uint_fast64_t
fastest unsigned integer type with width of
at least 8, 16, 32 and 64 bits respectively
(typedef)
uint_least8_t
uint_least16_t
uint_least32_t
uint_least64_t
smallest unsigned integer type with width of
at least 8, 16, 32 and 64 bits respectively
(typedef)
uintmax_t
maximum width unsigned integer type
(typedef)
uintptr_t
(optional)
unsigned integer type capable of holding a pointer
(typedef)

[edit] Macros

Signed integers : minimum value
INT8_MIN
INT16_MIN
INT32_MIN
INT64_MIN
minimum value of an object of type int8_t, int16_t, int32_t, int64_t
(macro constant)
INT_FAST8_MIN
INT_FAST16_MIN
INT_FAST32_MIN
INT_FAST64_MIN
minimum value of an object of type int_fast8_t, int_fast16_t, int_fast32_t, int_fast64_t
(macro constant)
INT_LEAST8_MIN
INT_LEAST16_MIN
INT_LEAST32_MIN
INT_LEAST64_MIN
minimum value of an object of type int_least8_t, int_least16_t, int_least32_t, int_least64_t
(macro constant)
INTPTR_MIN
minimum value of an object of type intptr_t
(macro constant)
INTMAX_MIN
minimum value of an object of type intmax_t
(macro constant)
Signed integers : maximum value
INT8_MAX
INT16_MAX
INT32_MAX
INT64_MAX
maximum value of an object of type int8_t, int16_t, int32_t, int64_t
(macro constant)
INT_FAST8_MAX
INT_FAST16_MAX
INT_FAST32_MAX
INT_FAST64_MAX
maximum value of an object of type int_fast8_t, int_fast16_t, int_fast32_t, int_fast64_t
(macro constant)
INT_LEAST8_MAX
INT_LEAST16_MAX
INT_LEAST32_MAX
INT_LEAST64_MAX
maximum value of an object of type int_least8_t, int_least16_t, int_least32_t, int_least64_t
(macro constant)
INTPTR_MAX
maximum value of an object of type intptr_t
(macro constant)
INTMAX_MAX
maximum value of an object of type intmax_t
(macro constant)
Unsigned integers : maximum value
UINT8_MAX
UINT16_MAX
UINT32_MAX
UINT64_MAX
maximum value of an object of type uint8_t, uint16_t, uint32_t, uint64_t
(macro constant)
UINT_FAST8_MAX
UINT_FAST16_MAX
UINT_FAST32_MAX
UINT_FAST64_MAX
maximum value of an object of type uint_fast8_t, uint_fast16_t, uint_fast32_t, uint_fast64_t
(macro constant)
UINT_LEAST8_MAX
UINT_LEAST16_MAX
UINT_LEAST32_MAX
UINT_LEAST64_MAX
maximum value of an object of type uint_least8_t, uint_least16_t, uint_least32_t, uint_least64_t
(macro constant)
UINTPTR_MAX
maximum value of an object of type uintptr_t
(macro constant)
UINTMAX_MAX
maximum value of an object of type uintmax_t
(macro constant)
Limits of other integer types
PTRDIFF_MIN
minimum value of object of std::ptrdiff_t type
(macro constant)
PTRDIFF_MAX
maximum value of object of std::ptrdiff_t type
(macro constant)
SIZE_MAX
maximum value of object of std::size_t type
(macro constant)
SIG_ATOMIC_MIN
minimum value of object of std::sig_atomic_t type
(macro constant)
SIG_ATOMIC_MAX
maximum value of object of std::sig_atomic_t type
(macro constant)
WCHAR_MIN
minimum value of object of wchar_t type
(macro constant)
WCHAR_MAX
maximum value of object of wchar_t type
(macro constant)
WINT_MIN
minimum value of object of std::wint_t type
(macro constant)
WINT_MAX
maximum value of object of std::wint_t type
(macro constant)
Function macros for integer constants
INT8_C
INT16_C
INT32_C
INT64_C
expands to an integer constant having the value specified by its argument and the type int_least8_t, int_least16_t, int_least32_t, int_least64_t respectively
(function macro)
INTMAX_C
expands to an integer constant having the value specified by its argument and the type intmax_t
(function macro)
UINT8_C
UINT16_C
UINT32_C
UINT64_C
expands to an integer constant having the value specified by its argument and the type uint_least8_t, uint_least16_t, uint_least32_t, uint_least64_t respectively
(function macro)
UINTMAX_C
expands to an integer constant having the value specified by its argument and the type uintmax_t
(function macro)

[edit] Synopsis

namespace std {
    typedef /*signed integer type*/ int8_t;  // optional
    typedef /*signed integer type*/ int16_t; // optional
    typedef /*signed integer type*/ int32_t; // optional
    typedef /*signed integer type*/ int64_t; // optional
 
    typedef /*signed integer type*/ int_fast8_t;
    typedef /*signed integer type*/ int_fast16_t;
    typedef /*signed integer type*/ int_fast32_t;
    typedef /*signed integer type*/ int_fast64_t;
 
    typedef /*signed integer type*/ int_least8_t;
    typedef /*signed integer type*/ int_least16_t;
    typedef /*signed integer type*/ int_least32_t;
    typedef /*signed integer type*/ int_least64_t;
 
    typedef /*signed integer type*/ intmax_t;
    typedef /*signed integer type*/ intptr_t; //optional
 
 
    typedef /*unsigned integer type*/ uint8_t;  // optional
    typedef /*unsigned integer type*/ uint16_t; // optional
    typedef /*unsigned integer type*/ uint32_t; // optional
    typedef /*unsigned integer type*/ uint64_t; // optional
 
    typedef /*unsigned integer type*/ uint_fast8_t;
    typedef /*unsigned integer type*/ uint_fast16_t;
    typedef /*unsigned integer type*/ uint_fast32_t;
    typedef /*unsigned integer type*/ uint_fast64_t;
 
    typedef /*unsigned integer type*/ uint_least8_t;
    typedef /*unsigned integer type*/ uint_least16_t;
    typedef /*unsigned integer type*/ uint_least32_t;
    typedef /*unsigned integer type*/ uint_least64_t;
 
    typedef /*unsigned integer type*/ uintmax_t;
    typedef /*unsigned integer type*/ uintptr_t; //optional
 
} // namespace std