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+.\" $NetBSD: __arraycount.3,v 1.7 2017/07/03 21:30:58 wiz Exp $
+.\"
+.\" Copyright (c) 2010 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Jukka Ruohonen.
+.\"
+.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd December 16, 2010
+.Dt __ARRAYCOUNT 3
+.Os
+.Sh NAME
+.Nm __arraycount
+.Nd macro for statically allocated arrays
+.Sh SYNOPSIS
+.In sys/cdefs.h
+.Ft size_t
+.Fn __arraycount x
+.Sh DESCRIPTION
+The
+.Fn __arraycount
+macro returns the number of elements in a statically allocated buffer.
+.Sh EXAMPLES
+The following example demonstrates a typical usage of
+.Fn __arraycount :
+.Bd -literal -offset indent
+uint8_t buf[BUFSIZE];
+size_t i;
+
+\&...
+
+for (i = 0; i < __arraycount(buf); i++)
+	\&...
+.Ed
+.Sh SEE ALSO
+.Xr cdefs 3
+.Sh HISTORY
+The
+.Fn __arraycount
+macro first appeared in
+.Nx 4.0 .