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authorDavid Gwynne <dlg@cvs.openbsd.org>2014-02-13 12:39:02 +0000
committerDavid Gwynne <dlg@cvs.openbsd.org>2014-02-13 12:39:02 +0000
commitf87071c81561cafd3f10a839af88efb86c6da3a0 (patch)
tree88ad0717853694440bd829ac1efcb88b397c5d0a /share/man/man9
parentac739619b775cf38de134d2ed65b71512ec69d0a (diff)
this wasnt supposed to be part of the timeout.9 change
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-.\" $OpenBSD: bemtoh32.9,v 1.1 2014/02/13 12:38:20 dlg Exp $
-.\"
-.\" Copyright (c) 2014 David Gwynne <dlg@openbsd.org>
-.\" All rights reserved.
-.\"
-.\" Permission to use, copy, modify, and distribute this software for any
-.\" purpose with or without fee is hereby granted, provided that the above
-.\" copyright notice and this permission notice appear in all copies.
-.\"
-.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-.\"
-.Dd $Mdocdate: February 13 2014 $
-.Dt BEMTOH32 9
-.Os
-.Sh NAME
-.Nm bemtoh16 ,
-.Nm bemtoh32 ,
-.Nm bemtoh64 ,
-.Nm lemtoh16 ,
-.Nm lemtoh32 ,
-.Nm lemtoh64 ,
-.Nm htobem16 ,
-.Nm htobem32 ,
-.Nm htobem64 ,
-.Nm htobem16 ,
-.Nm htobem32 ,
-.Nm htobem64
-.Nd byte swapping memory load and store operations
-.Sh SYNOPSIS
-.In sys/types.h
-.Ft uint16_t
-.Fn bemtoh16 "uint16_t *m"
-.Ft uint32_t
-.Fn bemtoh32 "uint32_t *m"
-.Ft uint64_t
-.Fn bemtoh64 "uint64_t *m"
-.Ft uint16_t
-.Fn lemtoh16 "uint16_t *m"
-.Ft uint32_t
-.Fn lemtoh32 "uint32_t *m"
-.Ft uint64_t
-.Fn lemtoh64 "uint64_t *m"
-.Ft void
-.Fn htobem16 "uint16_t *m, uint16_t v"
-.Ft void
-.Fn htobem32 "uint32_t *m, uint32_t v"
-.Ft void
-.Fn htobem64 "uint64_t *m, uint64_t v"
-.Ft void
-.Fn htolem16 "uint16_t *m, uint16_t v"
-.Ft void
-.Fn htolem32 "uint32_t *m, uint32_t v"
-.Ft void
-.Fn htolem64 "uint64_t *m, uint64_t v"
-.Sh DESCRIPTION
-This API provides a way to take advantage of an architectures ability
-to load and store words in memory of different endians.
-If an architecture has no specialised support for these operations
-they will be implemented as a wrapper around the
-.Xr byteorder 3
-API.
-.Pp
-These operations are subject to the same alignment restrictions as
-the hosts normal memory loads and stores.
-.Pp
-.Fn bemtoh16 ,
-.Fn bemtoh32 ,
-and
-.Fn bemtoh64
-read a big endian value from the memory located at
-.Fa m
-into the hosts native byte order.
-.Fn lemtoh16 ,
-.Fn lemtoh32 ,
-and
-.Fn lemtoh64
-read a little endian value from the memory located at
-.Fa m
-into the hosts native byte order.
-.Pp
-.Fn htobem16 ,
-.Fn htobem32 ,
-and
-.Fn htobem64
-store the hosts native byte ordered value of
-.Fa v
-as a big endian value in the memory located at
-.Fa m .
-.Fn htolem16 ,
-.Fn htolem32 ,
-and
-.Fn htolem64
-store the hosts native byte ordered value of
-.Fa v
-as a little endian value in the memory located at
-.Fa m .
-.Sh CONTEXT
-.Fn bemtoh16 ,
-.Fn bemtoh32 ,
-.Fn bemtoh64 ,
-.Fn lemtoh16 ,
-.Fn lemtoh32 ,
-.Fn lemtoh64 ,
-.Fn htobem16 ,
-.Fn htobem32 ,
-.Fn htobem64 ,
-.Fn htolem16 ,
-.Fn htolem32 ,
-and
-.Fn htolem64
-can all be called during autoconf, from process context, or from interrupt
-context.
-.Sh RETURN VALUES
-.Fn bemtoh16 ,
-.Fn bemtoh32 ,
-.Fn bemtoh64 ,
-.Fn lemtoh16 ,
-.Fn lemtoh32 ,
-and
-.Fn lemtoh64
-return the hosts native byte ordered value of the memory at
-.Fa m
-after the appropriate byteswapping has occurred.
-.Pp
-.Fn htobem16 ,
-.Fn htobem32 ,
-.Fn htobem64 ,
-.Fn htolem16 ,
-.Fn htolem32 ,
-and
-.Fn htolem64
-do not return a value.
-.Sh SEE ALSO
-.Xr byteorder 3
-.Sh HISTORY
-These functions first appeared in
-.Ox 5.6 .