1.\" Copyright (c) 2002 Tim J. Robbins 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd August 3, 2002 28.Dt BTOWC 3 29.Os 30.Sh NAME 31.Nm btowc , 32.Nm wctob 33.Nd "convert between wide and single-byte characters" 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In wchar.h 38.Ft wint_t 39.Fn btowc "int c" 40.Ft int 41.Fn wctob "wint_t c" 42.Sh DESCRIPTION 43The 44.Fn btowc 45function converts a single-byte character into a corresponding wide character. 46If the character is 47.Dv EOF 48or not valid in the initial shift state, 49.Fn btowc 50returns 51.Dv WEOF . 52.Pp 53The 54.Fn wctob 55function converts a wide character into a corresponding single-byte character. 56If the wide character is 57.Dv WEOF 58or not able to be represented as a single byte in the initial shift state, 59.Fn wctob 60returns 61.Dv WEOF . 62.Sh SEE ALSO 63.Xr mbrtowc 3 , 64.Xr multibyte 3 , 65.Xr wcrtomb 3 66.Sh STANDARDS 67The 68.Fn btowc 69and 70.Fn wctob 71functions conform to 72.St -p1003.1-2001 . 73.Sh HISTORY 74The 75.Fn btowc 76and 77.Fn wctob 78functions first appeared in 79.Fx 5.0 . 80