xref: /freebsd/lib/libc/locale/btowc.3 (revision 7bd6fde3)
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