mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-18 10:35:55 +00:00
137 lines
4.0 KiB
Groff
137 lines
4.0 KiB
Groff
.\" Copyright (c) 2002 Mike Barcroft <mike@FreeBSD.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd September 15, 2002
|
|
.Dt STDINT 7
|
|
.Os
|
|
.Sh NAME
|
|
.Nm stdint
|
|
.Nd "standard integer types"
|
|
.Sh SYNOPSIS
|
|
.In stdint.h
|
|
.Sh DESCRIPTION
|
|
The
|
|
.In stdint.h
|
|
header provides source-portable integer types of a specific
|
|
size, smallest memory footprint with a minimum size, fastest
|
|
access speed with a minimum size, largest integer size, and
|
|
those capable of storing pointers.
|
|
.Pp
|
|
The types
|
|
.Vt int8_t ,
|
|
.Vt int16_t ,
|
|
.Vt int32_t ,
|
|
and
|
|
.Vt int64_t
|
|
provide a signed integer type of width 8, 16, 32, or 64 bits, respectively.
|
|
The types
|
|
.Vt uint8_t ,
|
|
.Vt uint16_t ,
|
|
.Vt uint32_t ,
|
|
and
|
|
.Vt uint64_t
|
|
provide an unsigned integer type of width 8, 16, 32, or 64 bits, respectively.
|
|
These integer types should be used when a specific size is required.
|
|
.Pp
|
|
The types
|
|
.Vt int_fast8_t ,
|
|
.Vt int_fast16_t ,
|
|
.Vt int_fast32_t ,
|
|
and
|
|
.Vt int_fast64_t
|
|
provide the fastest signed integer type with a width
|
|
of at least 8, 16, 32, or 64 bits, respectively.
|
|
The types
|
|
.Vt uint_fast8_t ,
|
|
.Vt uint_fast16_t ,
|
|
.Vt uint_fast32_t ,
|
|
and
|
|
.Vt uint_fast64_t
|
|
provide the fastest unsigned integer type with a width
|
|
of at least 8, 16, 32, or 64 bits, respectively.
|
|
These types should be used when access speed is
|
|
paramount, and when a specific size is not required.
|
|
.Pp
|
|
The types
|
|
.Vt int_least8_t ,
|
|
.Vt int_least16_t ,
|
|
.Vt int_least32_t ,
|
|
and
|
|
.Vt int_least64_t
|
|
provide the smallest memory footprint signed integer type with
|
|
a width of at least 8, 16, 32, or 64 bits, respectively.
|
|
The types
|
|
.Vt uint_least8_t ,
|
|
.Vt uint_least16_t ,
|
|
.Vt uint_least32_t ,
|
|
and
|
|
.Vt uint_least64_t
|
|
provide the smallest memory footprint unsigned integer type with
|
|
a width of at least 8, 16, 32, or 64 bits, respectively.
|
|
These types should be used when memory storage is of
|
|
concern, and when a specific size is not required.
|
|
.Pp
|
|
The type
|
|
.Vt intmax_t
|
|
provides a signed integer type large
|
|
enough to hold any other signed integer.
|
|
The type
|
|
.Vt uintmax_t
|
|
provides an unsigned integer type large
|
|
enough to hold any other unsigned integer.
|
|
These types are generally the largest signed and unsigned
|
|
integer types available on a specific architecture.
|
|
.Pp
|
|
The type
|
|
.Vt intptr_t
|
|
provides a signed integer type with the ability to hold a pointer to
|
|
.Vt void ,
|
|
that can later be converted back to a pointer to
|
|
.Vt void .
|
|
.Pp
|
|
The type
|
|
.Vt uintptr_t
|
|
provides an unsigned integer type with the ability to hold a pointer to
|
|
.Vt void ,
|
|
that can later be converted back to a pointer to
|
|
.Vt void .
|
|
.Pp
|
|
Additionally, the
|
|
.In stdint.h
|
|
header defines some macros, but none of them are documented here.
|
|
.Sh STANDARDS
|
|
The
|
|
.In stdint.h
|
|
header conforms to
|
|
.St -isoC-99
|
|
and
|
|
.St -p1003.1-2001 .
|
|
.Sh HISTORY
|
|
The
|
|
.In stdint.h
|
|
header was first introduced in
|
|
.Fx 5.0 .
|