stdint.5 (2010 09)

ManualsBrandsHP ManualsSoftwareHP-UX Manpages

stdint(5) stdint(5)

NAME

stdint - integer types

SYNOPSIS

#include <stdint.h>

DESCRIPTION

This header ﬁle deﬁnes sets of integer types having speciﬁed widths and corresponding sets of macros. It

also deﬁnes macros that specify limits of integer types corresponding to types deﬁned in other standard

headers.

Since not all implementations are required to support all of the integer sizes deﬁned in this manual page,

the proper way to see if a particular size of an integer is supported on the current implementation is to

test the symbol that deﬁnes its maximum value. For example, if

#ifdef UINT64_MAX tests false, then

that implementation does not support 64-bit unsigned signed integers.

This header ﬁle deﬁnes the following integer data types for 8, 16, 32, and 64 bits.

intmax_t largest signed integer data type supported by implementation

int8_t 8-bit signed integer

int16_t 16-bit signed integer

int32_t 32-bit signed integer

int64_t 64-bit signed integer

uintmax_t largest unsigned integer data type supported by implementation

uint8_t 8-bit unsigned integer

uint16_t 16-bit unsigned integer

uint32_t 32-bit unsigned integer

uint64_t 64-bit unsigned integer

The following two data types are signed and unsigned integer data types that are large enough to hold a

pointer. A pointer can be moved to or from these data types without corruption.

intptr_t signed integer type that is large enough to hold a pointer

uintptr_t unsigned integer type that is large enough to hold a pointer

This header ﬁle deﬁnes the following integer data types for determining the most efﬁcient data types to

use for integer values on a particular implementation.

intfast_t most efﬁcient signed integer data type supported by implementation

int_fast8_t most efﬁcient signed integer of at least 8 bits

int_fast16_t most efﬁcient signed integer of at least 16 bits

int_fast32_t most efﬁcient signed integer of at least 32 bits

int_fast64_t most efﬁcient signed integer of at least 64 bits

uintfast_t most efﬁcient unsigned integer data type supported by implementation

uint_fast8_t most efﬁcient unsigned integer of at least 8 bits

uint_fast16_t most efﬁcient unsigned integer of at least 16 bits

uint_fast32_t most efﬁcient unsigned integer of at least 32 bits

uint_fast64_t most efﬁcient unsigned integer of at least 64 bits

This header ﬁle deﬁnes the following integer data types for compatibility with systems that do not ﬁt the

16-bit or 32-bit word size model. These data types deﬁne the signed and unsigned integers of at least 8,

16, 32, and 64 bits.

int_least8_t smallest signed integer of at least 8 bits

int_least16_t smallest signed integer of at least 16 bits

int_least32_t smallest signed integer of at least 32 bits

HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1

Summary of content (4 pages)

PAGE 1
stdint(5) stdint(5) NAME stdint - integer types SYNOPSIS #include DESCRIPTION This header file defines sets of integer types having specified widths and corresponding sets of macros. It also defines macros that specify limits of integer types corresponding to types defined in other standard headers.
PAGE 2
stdint(5) stdint(5) int_least64_t smallest signed integer of at least 64 bits uint_least8_t smallest unsigned integer of at least 8 bits uint_least16_t smallest unsigned integer of at least 16 bits uint_least32_t smallest unsigned integer of at least 32 bits uint_least64_t smallest unsigned integer of at least 64 bits The following macros define the minimum and maximum values that can be stored in the above data types.
PAGE 3
stdint(5) INT_LEAST64_MAX stdint(5) maximum value that can be stored in an int_least_64_t data type The following macros specify the maximum and minimum limits of integer types corresponding to types defined in other standard headers. All these values are implementation defined.
PAGE 4
(Notes) A (Notes) sA 4 Hewlett-Packard Company −1− HP-UX 11i Version 3: September 2010