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+.\"	$NetBSD: scanc.9,v 1.4 2013/04/24 00:56:14 yamt Exp $
+.\"
+.\" Copyright (c)2011,2013 YAMAMOTO Takashi,
+.\" 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.
+.\"
+.\" ------------------------------------------------------------
+.Dd April 24, 2013
+.Dt SCANC 9
+.Os
+.\" ------------------------------------------------------------
+.Sh NAME
+.Nm scanc
+.Nd use byte string as lookup table index
+.\" ------------------------------------------------------------
+.Sh SYNOPSIS
+.In lib/libkern/libkern.h
+.\" - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+.Ft int
+.Fn scanc \
+"u_int size" "const u_char *cp" "const u_char table[]" "int mask"
+.\" ------------------------------------------------------------
+.Sh DESCRIPTION
+The
+.Fn scanc
+function scans the byte string
+.Fa cp ,
+whose length is
+.Fa size .
+A character in the string is used as an index in the 256-byte
+.Fa table .
+If a bitwise-AND of the byte from the table and
+.Fa mask
+isn't zero or the string is exhausted, the scan stops.
+.\" ------------------------------------------------------------
+.Sh RETURN VALUES
+The
+.Fn scanc
+function returns the length of the rest of the string,
+including the character which made the scan stop.
+If the
+.Fn scanc
+function exhausted the string, it returns 0.
+.\" ------------------------------------------------------------
+.Sh HISTORY
+The
+.Fn scanc
+function emulates a VAX instruction with the same name.