.\" Copyright (c) 1990, 1991, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek.
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.\" modification, are permitted provided that the following conditions
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.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\"     @(#)bstring.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: src/lib/libc/string/bstring.3,v 1.7 2001/10/01 16:09:00 ru Exp $
.\"
.Dd June 4, 1993
.Dt BSTRING 3
.Os
.Sh NAME
.Nm bcmp ,
.Nm bcopy ,
.Nm bzero ,
.Nm memccpy ,
.Nm memchr ,
.Nm memcmp ,
.Nm memcpy ,
.Nm memmove ,
.Nm memset
.Nd byte string operations
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In strings.h
.Ft int
.Fo bcmp
.Fa "const void *s1"
.Fa "const void *s2"
.Fa "size_t n"
.Fc
.Ft void
.Fo bcopy
.Fa "const void *s1"
.Fa "void *s2"
.Fa "size_t n"
.Fc
.Ft void
.Fo bzero
.Fa "void *s"
.Fa "size_t n"
.Fc
.In string.h
.Ft void *
.Fo memccpy
.Fa "void *restrict s1"
.Fa "const void *restrict s2"
.Fa "int c"
.Fa "size_t n"
.Fc
.Ft void *
.Fo memchr
.Fa "const void *s"
.Fa "int c"
.Fa "size_t n"
.Fc
.Ft int
.Fo memcmp
.Fa "const void *s1"
.Fa "const void *s2"
.Fa "size_t n"
.Fc
.Ft void *
.Fo memcpy
.Fa "void *restrict s1"
.Fa "const void *restrict s2"
.Fa "size_t n"
.Fc
.Ft void *
.Fo memmove
.Fa "void *s1"
.Fa "const void *s2"
.Fa "size_t n"
.Fc
.Ft void *
.Fo memset
.Fa "void *s"
.Fa "int c"
.Fa "size_t n"
.Fc
.Sh DESCRIPTION
These functions operate on variable length strings of bytes.
They do not check for terminating null bytes, as the routines
listed in
.Xr string 3
do.
.Pp
See the specific manual pages for more information.
.Sh LEGACY SYNOPSIS
.Fd #include <string.h>
.Pp
The include file
.In string.h
is necessary and sufficient for all functions.
.Sh SEE ALSO
.Xr bcmp 3 ,
.Xr bcopy 3 ,
.Xr bzero 3 ,
.Xr memccpy 3 ,
.Xr memchr 3 ,
.Xr memcmp 3 ,
.Xr memcpy 3 ,
.Xr memmove 3 ,
.Xr memset 3 ,
.Xr compat 5
.Sh STANDARDS
The functions
.Fn memchr ,
.Fn memcmp ,
.Fn memcpy ,
.Fn memmove ,
and
.Fn memset
conform to
.St -isoC .
.Sh HISTORY
The functions
.Fn bzero
and
.Fn memccpy
appeared in
.Bx 4.3 ;
the functions
.Fn bcmp ,
.Fn bcopy ,
appeared in
.Bx 4.2 .