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 March 5, 2002 28.Dt BYTEORDER 9 29.Os 30.Sh NAME 31.Nm be16toh , 32.Nm be32toh , 33.Nm be64toh , 34.Nm htobe16 , 35.Nm htobe32 , 36.Nm htobe64 , 37.Nm htole16 , 38.Nm htole32 , 39.Nm htole64 , 40.Nm le16toh , 41.Nm le32toh , 42.Nm le64toh 43.Nd convert values between big endian, little endian, and host byte order 44.Sh SYNOPSIS 45.In sys/param.h 46.Ft uint16_t 47.Fn be16toh "uint16_t big16" 48.Ft uint32_t 49.Fn be32toh "uint32_t big32" 50.Ft uint64_t 51.Fn be64toh "uint64_t big64" 52.Ft uint16_t 53.Fn htobe16 "uint16_t host16" 54.Ft uint32_t 55.Fn htobe32 "uint32_t host32" 56.Ft uint64_t 57.Fn htobe64 "uint64_t host64" 58.Ft uint16_t 59.Fn htole16 "uint16_t host16" 60.Ft uint32_t 61.Fn htole32 "uint32_t host32" 62.Ft uint64_t 63.Fn htole64 "uint64_t host64" 64.Ft uint16_t 65.Fn le16toh "uint16_t little16" 66.Ft uint32_t 67.Fn le32toh "uint32_t little32" 68.Ft uint64_t 69.Fn le64toh "uint64_t little64" 70.Sh DESCRIPTION 71The 72.Fn be16toh , 73.Fn be32toh , 74and 75.Fn be64toh 76functions return a big endian byte ordered integer 77converted to the system's native byte order. 78The return value will be the same as the argument on big endian systems. 79.Pp 80The 81.Fn le16toh , 82.Fn le32toh , 83and 84.Fn le64toh 85functions return a little endian byte ordered integer 86converted to the system's native byte order. 87The return value will be the same as the argument on little endian systems. 88.Pp 89The 90.Fn htobe16 , 91.Fn htobe32 , 92and 93.Fn htobe64 94functions return a integer in the system's native 95byte order converted to big endian byte order. 96The return value will be the same as the argument on big endian systems. 97.Pp 98The 99.Fn htole16 , 100.Fn htole32 , 101and 102.Fn htole64 103functions return a integer in the system's native 104byte order converted to little endian byte order. 105The return value will be the same as the argument on little endian systems. 106.Sh SEE ALSO 107.Xr byteorder 3 108.Sh HISTORY 109These functions first appeared in 110.Fx 5.0 , 111and were originally developed by the 112.Nx 113project. 114