1.\" Copyright (c) 2002 Mike Barcroft <mike@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd April 6, 2002 28.Dt STDINT 7 29.Os 30.Sh NAME 31.Nm stdint 32.Nd "integer types" 33.Sh SYNOPSIS 34.In stdint.h 35.Sh DESCRIPTION 36The 37.Aq Pa stdint.h 38header provides source-portable integer types of a specific 39size, smallest memory footprint with a minimum size, fastest 40access speed with a minimum size, and largest integer size. 41.Pp 42The types 43.Vt int8_t , 44.Vt int16_t , 45.Vt int32_t , 46and 47.Vt int64_t 48provide a signed integer type of width 8, 16, 32, or 64 bits, respectively. 49The types 50.Vt uint8_t , 51.Vt uint16_t , 52.Vt uint32_t , 53and 54.Vt uint64_t 55provide an unsigned integer type of width 8, 16, 32, or 64 bits, respectively. 56These integer types should be used when a specific size is required. 57.Pp 58The types 59.Vt int_fast8_t , 60.Vt int_fast16_t , 61.Vt int_fast32_t , 62and 63.Vt int_fast64_t 64provide the fastest signed integer type with a width 65of at least 8, 16, 32, or 64 bits, respectively. 66The types 67.Vt uint_fast8_t , 68.Vt uint_fast16_t , 69.Vt uint_fast32_t , 70and 71.Vt uint_fast64_t 72provide the fastest unsigned integer type with a width 73of at least 8, 16, 32, or 64 bits, respectively. 74These types should be used when access speed is 75paramount, and when a specific size is not required. 76.Pp 77The types 78.Vt int_least8_t , 79.Vt int_least16_t , 80.Vt int_least32_t , 81and 82.Vt int_least64_t 83provide the smallest memory footprint signed integer type with 84a width of at least 8, 16, 32, or 64 bits, respectively. 85The types 86.Vt uint_least8_t , 87.Vt uint_least16_t , 88.Vt uint_least32_t , 89and 90.Vt uint_least64_t 91provide the smallest memory footprint unsigned integer type with 92a width of at least 8, 16, 32, or 64 bits, respectively. 93These types should be used when memory storage is of 94concern, and when a specific size is not required. 95.Pp 96The type 97.Vt intmax_t 98provides a signed integer type large 99enough to hold any other signed integer. 100The type 101.Vt uintmax_t 102provides an unsigned integer type large 103enough to hold any other unsigned integer. 104These types are generally the largest signed and unsigned 105integer types available on a specific architecture. 106.Sh STANDARDS 107The 108.Aq Pa stdint.h 109header conforms to 110.St -isoC-99 111and 112.St -p1003.1-2001 . 113.Sh HISTORY 114The 115.Aq Pa stdint.h 116header was first introduced in 117.Fx 5.0 . 118.Sh BUGS 119Not all of the 120.Aq Pa stdint.h 121header's features are documented. 122