1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Chris Torek. 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd December 5, 2023 31.Dt BSTRING 3 32.Os 33.Sh NAME 34.Nm bcmp , 35.Nm bcopy , 36.Nm bzero , 37.Nm memccpy , 38.Nm memchr , 39.Nm memcmp , 40.Nm memcpy , 41.Nm memmove , 42.Nm memset 43.Nd byte string operations 44.Sh LIBRARY 45.Lb libc 46.Sh SYNOPSIS 47.In string.h 48.Ft int 49.Fn bcmp "const void *b1" "const void *b2" "size_t len" 50.Ft void 51.Fn bcopy "const void *src" "void *dst" "size_t len" 52.Ft void 53.Fn bzero "void *b" "size_t len" 54.Ft void * 55.Fn memchr "const void *b" "int c" "size_t len" 56.Ft int 57.Fn memcmp "const void *b1" "const void *b2" "size_t len" 58.Ft void * 59.Fo memccpy 60.Fa "void * restrict dst" 61.Fa "const void * restrict src" 62.Fa "int c" 63.Fa "size_t len" 64.Fc 65.Ft void * 66.Fn memcpy "void *dst" "const void *src" "size_t len" 67.Ft void * 68.Fn memmove "void *dst" "const void *src" "size_t len" 69.Ft void * 70.Fn memset "void *b" "int c" "size_t len" 71.Sh DESCRIPTION 72These functions operate on variable length strings of bytes. 73They do not check for terminating null bytes as the routines 74listed in 75.Xr string 3 76do. 77.Pp 78See the specific manual pages for more information. 79.Sh SEE ALSO 80.Xr bcmp 3 , 81.Xr bcopy 3 , 82.Xr bzero 3 , 83.Xr memccpy 3 , 84.Xr memchr 3 , 85.Xr memcmp 3 , 86.Xr memccpy 3 , 87.Xr memcpy 3 , 88.Xr memmove 3 , 89.Xr memset 3 90.Sh STANDARDS 91The functions 92.Fn memchr , 93.Fn memcmp , 94.Fn memcpy , 95.Fn memmove , 96and 97.Fn memset 98conform to 99.St -isoC . 100.Sh HISTORY 101The functions 102.Fn bzero 103and 104.Fn memccpy 105appeared in 106.Bx 4.3 ; 107the functions 108.Fn bcmp , 109.Fn bcopy , 110appeared in 111.Bx 4.2 . 112