<stdint.h>
[Added with C99]
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
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
intmax_t
· intptr_t
· uintmax_t
· uintptr_t
INT8_C
· INT16_C
· INT32_C
· INT64_C
· INT8_MAX
· INT16_MAX
· INT32_MAX
· INT64_MAX
· INT8_MIN
· INT16_MIN
· INT32_MIN
· INT64_MIN
· INT_FAST8_MAX
· INT_FAST16_MAX
· INT_FAST32_MAX
· INT_FAST64_MAX
· INT_FAST8_MIN
· INT_FAST16_MIN
· INT_FAST32_MIN
· INT_FAST64_MIN
· INT_LEAST8_MAX
· INT_LEAST16_MAX
· INT_LEAST32_MAX
· INT_LEAST64_MAX
· INT_LEAST8_MIN
· INT_LEAST16_MIN
· INT_LEAST32_MIN
· INT_LEAST64_MIN
UINT8_C
· UINT16_C
· UINT32_C
· UINT64_C
· UINTMAX_C
· UINT8_MAX
· UINT16_MAX
· UINT32_MAX
· UINT64_MAX
· UINT_FAST8_MAX
· UINT_FAST16_MAX
· UINT_FAST32_MAX
· UINT_FAST64_MAX
· UINT_LEAST8_MAX
· UINT_LEAST16_MAX
· UINT_LEAST32_MAX
· UINT_LEAST64_MAX
INTMAX_C
· INTMAX_MAX
· INTMAX_MIN
· INTPTR_MAX
· INTPTR_MIN
· PTRDIFF_MAX
· PTRDIFF_MIN
· SIG_ATOMIC_MAX
· SIG_ATOMIC_MIN
· SIZE_MAX
· WCHAR_MAX
· WCHAR_MIN
· WINT_MAX
· WINT_MIN
· UINTMAX_MAX
· UINTPTR_MAX
Include the standard header <stdint.h>
to define various integer types, and related macros, with size
constraints. Note that the definitions shown for the types and
macros are merely representative -- they can vary among implementations.
/* TYPE DEFINITIONS */ typedef signed char int8_t; typedef short int16_t; typedef long int32_t; typedef long long int64_t; typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned long uint32_t; typedef unsigned long long uint64_t; typedef signed char int_least8_t; typedef short int_least16_t; typedef long int_least32_t; typedef long long int_least64_t; typedef unsigned char uint_least8_t; typedef unsigned short uint_least16_t; typedef unsigned long uint_least32_t; typedef unsigned long long uint_least64_t; typedef signed char int_fast8_t; typedef short int_fast16_t; typedef long int_fast32_t; typedef long long int_fast64_t; typedef unsigned char uint_fast8_t; typedef unsigned short uint_fast16_t; typedef unsigned long uint_fast32_t; typedef unsigned long long uint_fast64_t; typedef long intptr_t; typedef unsigned long uintptr_t; typedef long long intmax_t; typedef unsigned long long uintmax_t; /* LIMIT MACROS */ #define INT8_MIN (-0x7f - 1) #define INT16_MIN (-0x7fff - 1) #define INT32_MIN (-0x7fffffff - 1) #define INT64_MIN (-0x7fffffffffffffff - 1) #define INT8_MAX 0x7f [exact] #define INT16_MAX 0x7fff [exact] #define INT32_MAX 0x7fffffff [exact] #define INT64_MAX 0x7fffffffffffffff [exact] #define UINT8_MAX 0xff [exact] #define UINT16_MAX 0xffff [exact] #define UINT32_MAX 0xffffffff [exact] #define UINT64_MAX 0xffffffffffffffff [exact] #define INT_LEAST8_MIN (-0x7f - 1) #define INT_LEAST16_MIN (-0x7fff - 1) #define INT_LEAST32_MIN (-0x7fffffff - 1) #define INT_LEAST64_MIN (-0x7fffffffffffffff - 1) #define INT_LEAST8_MAX 0x7f #define INT_LEAST16_MAX 0x7fff #define INT_LEAST32_MAX 0x7fffffff #define INT_LEAST64_MAX 0x7fffffffffffffff #define UINT_LEAST8_MAX 0xff #define UINT_LEAST16_MAX 0xffff #define UINT_LEAST32_MAX 0xffffffff #define UINT_LEAST64_MAX 0xffffffffffffffff #define INT_FAST8_MIN (-0x7f - 1) #define INT_FAST16_MIN (-0x7fff - 1) #define INT_FAST32_MIN (-0x7fffffff - 1) #define INT_FAST64_MIN (-0x7fffffffffffffff - 1) #define INT_FAST8_MAX 0x7f #define INT_FAST16_MAX 0x7fff #define INT_FAST32_MAX 0x7fffffff #define INT_FAST64_MAX 0x7fffffffffffffff #define UINT_FAST8_MAX 0xff #define UINT_FAST16_MAX 0xffff #define UINT_FAST32_MAX 0xffffffff #define UINT_FAST64_MAX 0xffffffffffffffff #define INTPTR_MIN (-0x7fffffff - 1) #define INTPTR_MAX 0x7fffffff #define UINTPTR_MAX 0xffffffff #define INT8_C(x) (x) #define INT16_C(x) (x) #define INT32_C(x) ((x) + (INT32_MAX - INT32_MAX)) #define INT64_C(x) ((x) + (INT64_MAX - INT64_MAX)) #define UINT8_C(x) (x) #define UINT16_C(x) (x) #define UINT32_C(x) ((x) + (UINT32_MAX - UINT32_MAX)) #define UINT64_C(x) ((x) + (UINT64_MAX - UINT64_MAX)) #define INTMAX_C(x) ((x) + (INT64_MAX - INT64_MAX)) #define UINTMAX_C(x) ((x) + (UINT64_MAX - UINT64_MAX)) #define PTRDIFF_MIN INT32_MIN #define PTRDIFF_MAX INT32_MAX #define SIG_ATOMIC_MIN INT32_MIN #define SIG_ATOMIC_MAX INT32_MAX #define SIZE_MAX UINT32_MAX #define WCHAR_MIN 0 #define WCHAR_MAX UINT16_MAX #define WINT_MIN 0 #define WINT_MAX UINT16_MAX #define INTMAX_MIN (-0x7fffffffffffffff - 1) #define INTMAX_MAX 0x7fffffffffffffff #define UINTMAX_MAX 0xffffffffffffffff
INT8_C
,
INT16_C
,
INT32_C
,
INT64_C
#define INT8_C(x) (x) #define INT16_C(x) (x) #define INT32_C(x) ((x) + (INT32_MAX - INT32_MAX)) #define INT64_C(x) ((x) + (INT64_MAX - INT64_MAX))
The macros each convert an integer literal to a signed integer type whose representation has at least eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
INT8_MAX
,
INT16_MAX
,
INT32_MAX
,
INT64_MAX
#define INT8_MAX 0x7f [exact] #define INT16_MAX 0x7fff [exact] #define INT32_MAX 0x7fffffff [exact] #define INT64_MAX 0x7fffffffffffffff [exact]
The macros each expand to an
#if expression
that yields the maximum value representable as type
int8_t
,
int16_t
,
int32_t
, or
int64_t
, respectively.
Note that the definitions shown here are exact.
INT8_MIN
,
INT16_MIN
,
INT32_MIN
,
INT64_MIN
#define INT8_MIN (-0x7f - 1) #define INT16_MIN (-0x7fff - 1) #define INT32_MIN (-0x7fffffff - 1) #define INT64_MIN (-0x7fffffffffffffff - 1)
The macros each expand to an
#if expression
that yields the minimum value representable as type
int8_t
,
int16_t
,
int32_t
, or
int64_t
, respectively.
Note that the definitions shown here are merely representative.
int8_t
,
int16_t
,
int32_t
,
int64_t
typedef signed char int8_t; typedef short int16_t; typedef long int32_t; typedef long long int64_t;
The types each specify a signed integer type whose representation has exactly eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
INT_FAST8_MAX
,
INT_FAST16_MAX
,
INT_FAST32_MAX
,
INT_FAST64_MAX
#define INT_FAST8_MAX 0x7f #define INT_FAST16_MAX 0x7fff #define INT_FAST32_MAX 0x7fffffff #define INT_FAST64_MAX 0x7fffffffffffffff
The macros each expand to an
#if expression
that yields the maximum value representable as type
int_fast8_t
,
int_fast16_t
,
int_fast32_t
, or
int_fast64_t
, respectively.
Note that the definitions shown here are merely representative.
INT_FAST8_MIN
,
INT_FAST16_MIN
,
INT_FAST32_MIN
,
INT_FAST64_MIN
#define INT_FAST8_MIN (-0x7f - 1) #define INT_FAST16_MIN (-0x7fff - 1) #define INT_FAST32_MIN (-0x7fffffff - 1) #define INT_FAST64_MIN (-0x7fffffffffffffff - 1)
The macros each expand to an
#if expression
that yields the minimum value representable as type
int_fast8_t
,
int_fast16_t
,
int_fast32_t
, or
int_fast64_t
, respectively.
Note that the definitions shown here are merely representative.
int_fast8_t
,
int_fast16_t
,
int_fast32_t
,
int_fast64_t
typedef signed char int_fast8_t; typedef short int_fast16_t; typedef long int_fast32_t; typedef long long int_fast64_t;
The types each specify a signed integer type that supports the fastest operations among those whose representation has at least eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
INT_LEAST8_MAX
,
INT_LEAST16_MAX
,
INT_LEAST32_MAX
,
INT_LEAST64_MAX
#define INT_LEAST8_MAX 0x7f #define INT_LEAST16_MAX 0x7fff #define INT_LEAST32_MAX 0x7fffffff #define INT_LEAST64_MAX 0x7fffffffffffffff
The macros each expand to an
#if expression
that yields the maximum value representable as type
int_least8_t
,
int_least16_t
,
int_least32_t
, or
int_least64_t
, respectively.
Note that the definitions shown here are merely representative.
INT_LEAST8_MIN
,
INT_LEAST16_MIN
,
INT_LEAST32_MIN
,
INT_LEAST64_MIN
#define INT_LEAST8_MIN (-0x7f - 1) #define INT_LEAST16_MIN (-0x7fff - 1) #define INT_LEAST32_MIN (-0x7fffffff - 1) #define INT_LEAST64_MIN (-0x7fffffffffffffff - 1)
The macros each expand to an
#if expression
that yields the minimum value representable as type
int_least8_t
,
int_least16_t
,
int_least32_t
, or
int_least64_t
, respectively.
Note that the definitions shown here are merely representative.
int_least8_t
,
int_least16_t
,
int_least32_t
,
int_least64_t
typedef signed char int_least8_t; typedef short int_least16_t; typedef long int_least32_t; typedef long long int_least64_t;
The types each specify a signed integer type whose representation has at least eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
INTMAX_C
#define INTMAX_C(x) ((x) + (INT64_MAX - INT64_MAX))
The macro converts an integer literal to the largest signed integer type. Note that the definition shown here is merely representative.
INTMAX_MAX
#define INTMAX_MAX 0x7fffffffffffffff
The macro expands to an
#if expression
that yields the maximum value representable as type
intmax_t
.
Note that the definition shown here is merely representative.
INTMAX_MIN
#define INTMAX_MIN (-0x7fffffffffffffff - 1)
The macro expands to an
#if expression
that yields the minimum value representable as type
intmax_t
.
Note that the definition shown here is merely representative.
intmax_t
typedef long long intmax_t;
The type specifies the largest signed integer type. Note that the definition shown here is merely representative.
INTPTR_MAX
#define INTPTR_MAX 0x7fffffff
The macro expands to an
#if expression
that yields the maximum value representable as type
intptr_t
.
Note that the definition shown here is merely representative.
INTPTR_MIN
#define INTPTR_MIN (-0x7fffffff - 1)
The macro expands to an
#if expression
that yields the minimum value representable as type
intptr_t
.
Note that the definition shown here is merely representative.
intptr_t
typedef long intptr_t;
The type specifies a signed integer type large enough to support
interconversion with a void pointer. (You can convert a void pointer to
intptr_t
and back, and the result compares equal to the original
pointer value.)
Note that the definition shown here is merely representative.
PTRDIFF_MAX
#define PTRDIFF_MAX INT32_MAX
The macro expands to an
#if expression
that yields the maximum value representable as type
ptrdiff_t
.
Note that the definition shown here is merely representative.
PTRDIFF_MIN
#define PTRDIFF_MIN INT32_MIN
The macro expands to an
#if expression
that yields the minimum value representable as type
ptrdiff_t
.
Note that the definition shown here is merely representative.
SIG_ATOMIC_MAX
#define SIG_ATOMIC_MAX INT32_MAX
The macro expands to an
#if expression
that yields the maximum value representable as type
sig_atomic_t
.
Note that the definition shown here is merely representative.
SIG_ATOMIC_MIN
#define SIG_ATOMIC_MIN INT32_MIN
The macro expands to an
#if expression
that yields the minimum value representable as type
sig_atomic_t
.
Note that the definition shown here is merely representative.
SIZE_MAX
#define SIZE_MAX UINT32_MAX
The macro expands to an
#if expression
that yields the maximum value representable as type
size_t
.
Note that the definition shown here is merely representative.
UINT8_C
,
UINT16_C
,
UINT32_C
,
UINT64_C
#define UINT8_C(x) (x) #define UINT16_C(x) (x) #define UINT32_C(x) ((x) + (UINT32_MAX - UINT32_MAX)) #define UINT64_C(x) ((x) + (UINT64_MAX - UINT64_MAX))
The macros each convert an integer literal to an unsigned integer type whose representation has at least eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
UINT8_MAX
,
UINT16_MAX
,
UINT32_MAX
,
UINT64_MAX
#define UINT8_MAX 0xff [exact] #define UINT16_MAX 0xffff [exact] #define UINT32_MAX 0xffffffff [exact] #define UINT64_MAX 0xffffffffffffffff [exact]
The macros each expand to an
#if expression
that yields the maximum value representable as type
uint8_t
,
uint16_t
,
uint32_t
, or
uint64_t
, respectively.
Note that the definitions shown here are exact.
uint8_t
,
uint16_t
,
uint32_t
,
uint64_t
typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned long uint32_t; typedef unsigned long long uint64_t;
The types each specify an unsigned integer type whose representation has exactly eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
UINT_FAST8_MAX
,
UINT_FAST16_MAX
,
UINT_FAST32_MAX
,
UINT_FAST64_MAX
#define UINT_FAST8_MAX 0xff #define UINT_FAST16_MAX 0xffff #define UINT_FAST32_MAX 0xffffffff #define UINT_FAST64_MAX 0xffffffffffffffff
The macros each expand to an
#if expression
that yields the maximum value representable as type
uint_fast8_t
,
uint_fast16_t
,
uint_fast32_t
, or
uint_fast64_t
, respectively.
Note that the definitions shown here are merely representative
uint_fast8_t
,
uint_fast16_t
,
uint_fast32_t
,
uint_fast64_t
typedef unsigned char uint_fast8_t; typedef unsigned short uint_fast16_t; typedef unsigned long uint_fast32_t; typedef unsigned long long uint_fast64_t;
The types each specify an unsigned integer type that supports the fastest operations among those whose representation has at least eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
UINT_LEAST8_MAX
,
UINT_LEAST16_MAX
,
UINT_LEAST32_MAX
,
UINT_LEAST64_MAX
#define UINT_LEAST8_MAX 0xff #define UINT_LEAST16_MAX 0xffff #define UINT_LEAST32_MAX 0xffffffff #define UINT_LEAST64_MAX 0xffffffffffffffff
The macros each expand to an
#if expression
that yields the maximum value representable as type
uint_least8_t
,
uint_least16_t
,
uint_least32_t
, or
uint_least64_t
, respectively.
Note that the definitions shown here are merely representative
uint_least8_t
,
uint_least16_t
,
uint_least32_t
,
uint_least64_t
typedef unsigned char uint_least8_t; typedef unsigned short uint_least16_t; typedef unsigned long uint_least32_t; typedef unsigned long long uint_least64_t;
The types each specify an unsigned integer type whose representation has at least eight, 16, 32, or 64 bits, respectively. Note that the definitions shown here are merely representative.
UINTMAX_C
#define UINTMAX_C(x) ((x) + (UINT64_MAX - UINT64_MAX))
The macro converts an unsuffixed integer literal to the largest unsigned integer type. Note that the definition shown here is merely representative.
UINTMAX_MAX
#define UINTMAX_MAX 0xffffffffffffffff
The macro expands to an
#if expression
that yields the maximum value representable as type
uintmax_t
.
Note that the definition shown here is merely representative.
uintmax_t
typedef unsigned long long uintmax_t;
The type specifies the largest unsigned integer type. Note that the definition shown here is merely representative.
UINTPTR_MAX
#define UINTPTR_MAX 0xffffffff
The macro expands to an
#if expression
that yields the maximum value representable as type
uintptr_t
.
Note that the definition shown here is merely representative.
uintptr_t
typedef unsigned long uintptr_t;
The type specifies an unsigned integer type large enough to support
interconversion with a void pointer. (You can convert a void pointer to
uintptr_t
and back, and the result compares equal to the original
pointer value.)
Note that the definition shown here is merely representative.
WCHAR_MAX
#define WCHAR_MAX UINT16_MAX
The macro expands to an
#if expression
that yields the maximum value representable as type
wchar_t
.
Note that the definition shown here is merely representative.
WCHAR_MIN
#define WCHAR_MIN 0
The macro expands to an
#if expression
that yields the minimum value representable as type
wchar_t
.
Note that the definition shown here is merely representative.
WINT_MAX
#define WINT_MAX UINT16_MAX
The macro expands to an
#if expression
that yields the maximum value representable as type
wint_t
.
Note that the definition shown here is merely representative.
WINT_MIN
#define WINT_MIN 0
The macro expands to an
#if expression
that yields the minimum value representable as type
wint_t
.
Note that the definition shown here is merely representative.
Copyright © 1998-2002 by P.J. Plauger. All rights reserved.