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<<A HREF="file:///usr/include/stdint.h">stdint.h</A>>: Standard Integer Types

<stdint.h>: Standard Integer Types

Section: avr-libc (3) Updated: Thu Aug 12 2010
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NAME

<stdint.h>: Standard Integer Types -  

Exact-width integer types


 Integer types having exactly the specified width 
typedef signed char int8_t

typedef unsigned char uint8_t

typedef signed int int16_t

typedef unsigned int uint16_t

typedef signed long int int32_t

typedef unsigned long int uint32_t

typedef signed long long int int64_t

typedef unsigned long long int uint64_t
 

Integer types capable of holding object pointers


 These allow you to declare variables of the same size as a pointer. 
typedef int16_t intptr_t

typedef uint16_t uintptr_t
 

Minimum-width integer types


 Integer types having at least the specified width 
typedef int8_t int_least8_t

typedef uint8_t uint_least8_t

typedef int16_t int_least16_t

typedef uint16_t uint_least16_t

typedef int32_t int_least32_t

typedef uint32_t uint_least32_t

typedef int64_t int_least64_t

typedef uint64_t uint_least64_t
 

Fastest minimum-width integer types


 Integer types being usually fastest having at least the specified width 
typedef int8_t int_fast8_t

typedef uint8_t uint_fast8_t

typedef int16_t int_fast16_t

typedef uint16_t uint_fast16_t

typedef int32_t int_fast32_t

typedef uint32_t uint_fast32_t

typedef int64_t int_fast64_t

typedef uint64_t uint_fast64_t
 

Greatest-width integer types


 Types designating integer data capable of representing any value of any integer type in the corresponding signed or unsigned category 
typedef int64_t intmax_t

typedef uint64_t uintmax_t
 

Limits of specified-width integer types


 C++ implementations should define these macros only when __STDC_LIMIT_MACROS is defined before <stdint.h> is included 
#define INT8_MAX 0x7f

#define INT8_MIN (-INT8_MAX - 1)

#define UINT8_MAX (__CONCAT(INT8_MAX, U) * 2U + 1U)

#define INT16_MAX 0x7fff

#define INT16_MIN (-INT16_MAX - 1)

#define UINT16_MAX (__CONCAT(INT16_MAX, U) * 2U + 1U)

#define INT32_MAX 0x7fffffffL

#define INT32_MIN (-INT32_MAX - 1L)

#define UINT32_MAX (__CONCAT(INT32_MAX, U) * 2UL + 1UL)

#define INT64_MAX 0x7fffffffffffffffLL

#define INT64_MIN (-INT64_MAX - 1LL)

#define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)
 

Limits of minimum-width integer types


 
#define INT_LEAST8_MAX INT8_MAX

#define INT_LEAST8_MIN INT8_MIN

#define UINT_LEAST8_MAX UINT8_MAX

#define INT_LEAST16_MAX INT16_MAX

#define INT_LEAST16_MIN INT16_MIN

#define UINT_LEAST16_MAX UINT16_MAX

#define INT_LEAST32_MAX INT32_MAX

#define INT_LEAST32_MIN INT32_MIN

#define UINT_LEAST32_MAX UINT32_MAX

#define INT_LEAST64_MAX INT64_MAX

#define INT_LEAST64_MIN INT64_MIN

#define UINT_LEAST64_MAX UINT64_MAX
 

Limits of fastest minimum-width integer types


 
#define INT_FAST8_MAX INT8_MAX

#define INT_FAST8_MIN INT8_MIN

#define UINT_FAST8_MAX UINT8_MAX

#define INT_FAST16_MAX INT16_MAX

#define INT_FAST16_MIN INT16_MIN

#define UINT_FAST16_MAX UINT16_MAX

#define INT_FAST32_MAX INT32_MAX

#define INT_FAST32_MIN INT32_MIN

#define UINT_FAST32_MAX UINT32_MAX

#define INT_FAST64_MAX INT64_MAX

#define INT_FAST64_MIN INT64_MIN

#define UINT_FAST64_MAX UINT64_MAX
 

Limits of integer types capable of holding object pointers


 
#define INTPTR_MAX INT16_MAX

#define INTPTR_MIN INT16_MIN

#define UINTPTR_MAX UINT16_MAX
 

Limits of greatest-width integer types


 
#define INTMAX_MAX INT64_MAX

#define INTMAX_MIN INT64_MIN

#define UINTMAX_MAX UINT64_MAX
 

Limits of other integer types


 C++ implementations should define these macros only when __STDC_LIMIT_MACROS is defined before <stdint.h> is included 
#define PTRDIFF_MAX INT16_MAX

#define PTRDIFF_MIN INT16_MIN

#define SIG_ATOMIC_MAX INT8_MAX

#define SIG_ATOMIC_MIN INT8_MIN

#define SIZE_MAX (__CONCAT(INT16_MAX, U))
 

Macros for integer constants


 C++ implementations should define these macros only when __STDC_CONSTANT_MACROS is defined before <stdint.h> is included.

These definitions are valid for integer constants without suffix and for macros defined as integer constant without suffix
#define INT8_C(value) ((int8_t) value)

#define UINT8_C(value) ((uint8_t) __CONCAT(value, U))

#define INT16_C(value) value

#define UINT16_C(value) __CONCAT(value, U)

#define INT32_C(value) __CONCAT(value, L)

#define UINT32_C(value) __CONCAT(value, UL)

#define INT64_C(value) __CONCAT(value, LL)

#define UINT64_C(value) __CONCAT(value, ULL)

#define INTMAX_C(value) __CONCAT(value, LL)

#define UINTMAX_C(value) __CONCAT(value, ULL)
 

Detailed Description

 #include <stdint.h> 

Use [u]intN_t if you need exactly N bits.

Since these typedefs are mandated by the C99 standard, they are preferred over rolling your own typedefs.  

Define Documentation

 

#define INT16_C(value) valuedefine a constant of type int16_t

 

#define INT16_MAX 0x7ffflargest positive value an int16_t can hold.

 

#define INT16_MIN (-INT16_MAX - 1)smallest negative value an int16_t can hold.

 

#define INT32_C(value) __CONCAT(value, L)define a constant of type int32_t

 

#define INT32_MAX 0x7fffffffLlargest positive value an int32_t can hold.

 

#define INT32_MIN (-INT32_MAX - 1L)smallest negative value an int32_t can hold.

 

#define INT64_C(value) __CONCAT(value, LL)define a constant of type int64_t

 

#define INT64_MAX 0x7fffffffffffffffLLlargest positive value an int64_t can hold.

 

#define INT64_MIN (-INT64_MAX - 1LL)smallest negative value an int64_t can hold.

 

#define INT8_C(value) ((int8_t) value)define a constant of type int8_t

 

#define INT8_MAX 0x7flargest positive value an int8_t can hold.

 

#define INT8_MIN (-INT8_MAX - 1)smallest negative value an int8_t can hold.

 

#define INT_FAST16_MAX INT16_MAXlargest positive value an int_fast16_t can hold.

 

#define INT_FAST16_MIN INT16_MINsmallest negative value an int_fast16_t can hold.

 

#define INT_FAST32_MAX INT32_MAXlargest positive value an int_fast32_t can hold.

 

#define INT_FAST32_MIN INT32_MINsmallest negative value an int_fast32_t can hold.

 

#define INT_FAST64_MAX INT64_MAXlargest positive value an int_fast64_t can hold.

 

#define INT_FAST64_MIN INT64_MINsmallest negative value an int_fast64_t can hold.

 

#define INT_FAST8_MAX INT8_MAXlargest positive value an int_fast8_t can hold.

 

#define INT_FAST8_MIN INT8_MINsmallest negative value an int_fast8_t can hold.

 

#define INT_LEAST16_MAX INT16_MAXlargest positive value an int_least16_t can hold.

 

#define INT_LEAST16_MIN INT16_MINsmallest negative value an int_least16_t can hold.

 

#define INT_LEAST32_MAX INT32_MAXlargest positive value an int_least32_t can hold.

 

#define INT_LEAST32_MIN INT32_MINsmallest negative value an int_least32_t can hold.

 

#define INT_LEAST64_MAX INT64_MAXlargest positive value an int_least64_t can hold.

 

#define INT_LEAST64_MIN INT64_MINsmallest negative value an int_least64_t can hold.

 

#define INT_LEAST8_MAX INT8_MAXlargest positive value an int_least8_t can hold.

 

#define INT_LEAST8_MIN INT8_MINsmallest negative value an int_least8_t can hold.

 

#define INTMAX_C(value) __CONCAT(value, LL)define a constant of type intmax_t

 

#define INTMAX_MAX INT64_MAXlargest positive value an intmax_t can hold.

 

#define INTMAX_MIN INT64_MINsmallest negative value an intmax_t can hold.

 

#define INTPTR_MAX INT16_MAXlargest positive value an intptr_t can hold.

 

#define INTPTR_MIN INT16_MINsmallest negative value an intptr_t can hold.

 

#define PTRDIFF_MAX INT16_MAXlargest positive value a ptrdiff_t can hold.

 

#define PTRDIFF_MIN INT16_MINsmallest negative value a ptrdiff_t can hold.

 

#define SIG_ATOMIC_MAX INT8_MAXlargest positive value a sig_atomic_t can hold.

 

#define SIG_ATOMIC_MIN INT8_MINsmallest negative value a sig_atomic_t can hold.

 

#define SIZE_MAX (__CONCAT(INT16_MAX, U))largest value a size_t can hold.

 

#define UINT16_C(value) __CONCAT(value, U)define a constant of type uint16_t

 

#define UINT16_MAX (__CONCAT(INT16_MAX, U) * 2U + 1U)largest value an uint16_t can hold.

 

#define UINT32_C(value) __CONCAT(value, UL)define a constant of type uint32_t

 

#define UINT32_MAX (__CONCAT(INT32_MAX, U) * 2UL + 1UL)largest value an uint32_t can hold.

 

#define UINT64_C(value) __CONCAT(value, ULL)define a constant of type uint64_t

 

#define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)largest value an uint64_t can hold.

 

#define UINT8_C(value) ((uint8_t) __CONCAT(value, U))define a constant of type uint8_t

 

#define UINT8_MAX (__CONCAT(INT8_MAX, U) * 2U + 1U)largest value an uint8_t can hold.

 

#define UINT_FAST16_MAX UINT16_MAXlargest value an uint_fast16_t can hold.

 

#define UINT_FAST32_MAX UINT32_MAXlargest value an uint_fast32_t can hold.

 

#define UINT_FAST64_MAX UINT64_MAXlargest value an uint_fast64_t can hold.

 

#define UINT_FAST8_MAX UINT8_MAXlargest value an uint_fast8_t can hold.

 

#define UINT_LEAST16_MAX UINT16_MAXlargest value an uint_least16_t can hold.

 

#define UINT_LEAST32_MAX UINT32_MAXlargest value an uint_least32_t can hold.

 

#define UINT_LEAST64_MAX UINT64_MAXlargest value an uint_least64_t can hold.

 

#define UINT_LEAST8_MAX UINT8_MAXlargest value an uint_least8_t can hold.

 

#define UINTMAX_C(value) __CONCAT(value, ULL)define a constant of type uintmax_t

 

#define UINTMAX_MAX UINT64_MAXlargest value an uintmax_t can hold.

 

#define UINTPTR_MAX UINT16_MAXlargest value an uintptr_t can hold.

 

Typedef Documentation

 

typedef signed int int16_t16-bit signed type.

 

typedef signed long int int32_t32-bit signed type.

 

typedef signed long long int int64_t64-bit signed type.

Note:

This type is not available when the compiler option -mint8 is in effect.

 

typedef signed char int8_t8-bit signed type.

 

typedef int16_t int_fast16_tfastest signed int with at least 16 bits.

 

typedef int32_t int_fast32_tfastest signed int with at least 32 bits.

 

typedef int64_t int_fast64_tfastest signed int with at least 64 bits.

Note:

This type is not available when the compiler option -mint8 is in effect.

 

typedef int8_t int_fast8_tfastest signed int with at least 8 bits.

 

typedef int16_t int_least16_tsigned int with at least 16 bits.

 

typedef int32_t int_least32_tsigned int with at least 32 bits.

 

typedef int64_t int_least64_tsigned int with at least 64 bits.

Note:

This type is not available when the compiler option -mint8 is in effect.

 

typedef int8_t int_least8_tsigned int with at least 8 bits.

 

typedef int64_t intmax_tlargest signed int available.

 

typedef int16_t intptr_tSigned pointer compatible type.

 

typedef unsigned int uint16_t16-bit unsigned type.

 

typedef unsigned long int uint32_t32-bit unsigned type.

 

typedef unsigned long long int uint64_t64-bit unsigned type.

Note:

This type is not available when the compiler option -mint8 is in effect.

 

typedef unsigned char uint8_t8-bit unsigned type.

 

typedef uint16_t uint_fast16_tfastest unsigned int with at least 16 bits.

 

typedef uint32_t uint_fast32_tfastest unsigned int with at least 32 bits.

 

typedef uint64_t uint_fast64_tfastest unsigned int with at least 64 bits.

Note:

This type is not available when the compiler option -mint8 is in effect.

 

typedef uint8_t uint_fast8_tfastest unsigned int with at least 8 bits.

 

typedef uint16_t uint_least16_tunsigned int with at least 16 bits.

 

typedef uint32_t uint_least32_tunsigned int with at least 32 bits.

 

typedef uint64_t uint_least64_tunsigned int with at least 64 bits.

Note:

This type is not available when the compiler option -mint8 is in effect.

 

typedef uint8_t uint_least8_tunsigned int with at least 8 bits.

 

typedef uint64_t uintmax_tlargest unsigned int available.

 

typedef uint16_t uintptr_tUnsigned pointer compatible type.

 

Author

Generated automatically by Doxygen for avr-libc from the source code.


 

Index

NAME
Exact-width integer types
Integer types capable of holding object pointers
Minimum-width integer types
Fastest minimum-width integer types
Greatest-width integer types
Limits of specified-width integer types
Limits of minimum-width integer types
Limits of fastest minimum-width integer types
Limits of integer types capable of holding object pointers
Limits of greatest-width integer types
Limits of other integer types
Macros for integer constants
Detailed Description
Define Documentation
#define INT16_C(value) valuedefine a constant of type int16_t
#define INT16_MAX 0x7ffflargest positive value an int16_t can hold.
#define INT16_MIN (-INT16_MAX - 1)smallest negative value an int16_t can hold.
#define INT32_C(value) __CONCAT(value, L)define a constant of type int32_t
#define INT32_MAX 0x7fffffffLlargest positive value an int32_t can hold.
#define INT32_MIN (-INT32_MAX - 1L)smallest negative value an int32_t can hold.
#define INT64_C(value) __CONCAT(value, LL)define a constant of type int64_t
#define INT64_MAX 0x7fffffffffffffffLLlargest positive value an int64_t can hold.
#define INT64_MIN (-INT64_MAX - 1LL)smallest negative value an int64_t can hold.
#define INT8_C(value) ((int8_t) value)define a constant of type int8_t
#define INT8_MAX 0x7flargest positive value an int8_t can hold.
#define INT8_MIN (-INT8_MAX - 1)smallest negative value an int8_t can hold.
#define INT_FAST16_MAX INT16_MAXlargest positive value an int_fast16_t can hold.
#define INT_FAST16_MIN INT16_MINsmallest negative value an int_fast16_t can hold.
#define INT_FAST32_MAX INT32_MAXlargest positive value an int_fast32_t can hold.
#define INT_FAST32_MIN INT32_MINsmallest negative value an int_fast32_t can hold.
#define INT_FAST64_MAX INT64_MAXlargest positive value an int_fast64_t can hold.
#define INT_FAST64_MIN INT64_MINsmallest negative value an int_fast64_t can hold.
#define INT_FAST8_MAX INT8_MAXlargest positive value an int_fast8_t can hold.
#define INT_FAST8_MIN INT8_MINsmallest negative value an int_fast8_t can hold.
#define INT_LEAST16_MAX INT16_MAXlargest positive value an int_least16_t can hold.
#define INT_LEAST16_MIN INT16_MINsmallest negative value an int_least16_t can hold.
#define INT_LEAST32_MAX INT32_MAXlargest positive value an int_least32_t can hold.
#define INT_LEAST32_MIN INT32_MINsmallest negative value an int_least32_t can hold.
#define INT_LEAST64_MAX INT64_MAXlargest positive value an int_least64_t can hold.
#define INT_LEAST64_MIN INT64_MINsmallest negative value an int_least64_t can hold.
#define INT_LEAST8_MAX INT8_MAXlargest positive value an int_least8_t can hold.
#define INT_LEAST8_MIN INT8_MINsmallest negative value an int_least8_t can hold.
#define INTMAX_C(value) __CONCAT(value, LL)define a constant of type intmax_t
#define INTMAX_MAX INT64_MAXlargest positive value an intmax_t can hold.
#define INTMAX_MIN INT64_MINsmallest negative value an intmax_t can hold.
#define INTPTR_MAX INT16_MAXlargest positive value an intptr_t can hold.
#define INTPTR_MIN INT16_MINsmallest negative value an intptr_t can hold.
#define PTRDIFF_MAX INT16_MAXlargest positive value a ptrdiff_t can hold.
#define PTRDIFF_MIN INT16_MINsmallest negative value a ptrdiff_t can hold.
#define SIG_ATOMIC_MAX INT8_MAXlargest positive value a sig_atomic_t can hold.
#define SIG_ATOMIC_MIN INT8_MINsmallest negative value a sig_atomic_t can hold.
#define SIZE_MAX (__CONCAT(INT16_MAX, U))largest value a size_t can hold.
#define UINT16_C(value) __CONCAT(value, U)define a constant of type uint16_t
#define UINT16_MAX (__CONCAT(INT16_MAX, U) * 2U + 1U)largest value an uint16_t can hold.
#define UINT32_C(value) __CONCAT(value, UL)define a constant of type uint32_t
#define UINT32_MAX (__CONCAT(INT32_MAX, U) * 2UL + 1UL)largest value an uint32_t can hold.
#define UINT64_C(value) __CONCAT(value, ULL)define a constant of type uint64_t
#define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)largest value an uint64_t can hold.
#define UINT8_C(value) ((uint8_t) __CONCAT(value, U))define a constant of type uint8_t
#define UINT8_MAX (__CONCAT(INT8_MAX, U) * 2U + 1U)largest value an uint8_t can hold.
#define UINT_FAST16_MAX UINT16_MAXlargest value an uint_fast16_t can hold.
#define UINT_FAST32_MAX UINT32_MAXlargest value an uint_fast32_t can hold.
#define UINT_FAST64_MAX UINT64_MAXlargest value an uint_fast64_t can hold.
#define UINT_FAST8_MAX UINT8_MAXlargest value an uint_fast8_t can hold.
#define UINT_LEAST16_MAX UINT16_MAXlargest value an uint_least16_t can hold.
#define UINT_LEAST32_MAX UINT32_MAXlargest value an uint_least32_t can hold.
#define UINT_LEAST64_MAX UINT64_MAXlargest value an uint_least64_t can hold.
#define UINT_LEAST8_MAX UINT8_MAXlargest value an uint_least8_t can hold.
#define UINTMAX_C(value) __CONCAT(value, ULL)define a constant of type uintmax_t
#define UINTMAX_MAX UINT64_MAXlargest value an uintmax_t can hold.
#define UINTPTR_MAX UINT16_MAXlargest value an uintptr_t can hold.
Typedef Documentation
typedef signed int int16_t16-bit signed type.
typedef signed long int int32_t32-bit signed type.
typedef signed long long int int64_t64-bit signed type.
typedef signed char int8_t8-bit signed type.
typedef int16_t int_fast16_tfastest signed int with at least 16 bits.
typedef int32_t int_fast32_tfastest signed int with at least 32 bits.
typedef int64_t int_fast64_tfastest signed int with at least 64 bits.
typedef int8_t int_fast8_tfastest signed int with at least 8 bits.
typedef int16_t int_least16_tsigned int with at least 16 bits.
typedef int32_t int_least32_tsigned int with at least 32 bits.
typedef int64_t int_least64_tsigned int with at least 64 bits.
typedef int8_t int_least8_tsigned int with at least 8 bits.
typedef int64_t intmax_tlargest signed int available.
typedef int16_t intptr_tSigned pointer compatible type.
typedef unsigned int uint16_t16-bit unsigned type.
typedef unsigned long int uint32_t32-bit unsigned type.
typedef unsigned long long int uint64_t64-bit unsigned type.
typedef unsigned char uint8_t8-bit unsigned type.
typedef uint16_t uint_fast16_tfastest unsigned int with at least 16 bits.
typedef uint32_t uint_fast32_tfastest unsigned int with at least 32 bits.
typedef uint64_t uint_fast64_tfastest unsigned int with at least 64 bits.
typedef uint8_t uint_fast8_tfastest unsigned int with at least 8 bits.
typedef uint16_t uint_least16_tunsigned int with at least 16 bits.
typedef uint32_t uint_least32_tunsigned int with at least 32 bits.
typedef uint64_t uint_least64_tunsigned int with at least 64 bits.
typedef uint8_t uint_least8_tunsigned int with at least 8 bits.
typedef uint64_t uintmax_tlargest unsigned int available.
typedef uint16_t uintptr_tUnsigned pointer compatible type.
Author

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Time: 21:42:10 GMT, April 16, 2011