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89 lines
2.5 KiB
Groff
89 lines
2.5 KiB
Groff
.\" Copyright (c) 2002 Tim J. Robbins
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd February 13, 2012
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.Dt BTOWC 3
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.Os
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.Sh NAME
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.Nm btowc ,
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.Nm wctob
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.Nd "convert between wide and single-byte characters"
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In wchar.h
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.Ft wint_t
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.Fn btowc "int c"
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.Ft int
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.Fn wctob "wint_t c"
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.In wchar.h
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.In xlocale.h
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.Ft wint_t
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.Fn btowc_l "int c" "locale_t loc"
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.Ft int
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.Fn wctob_l "wint_t c" "locale_t loc"
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.Sh DESCRIPTION
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The
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.Fn btowc
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function converts a single-byte character into a corresponding wide character.
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If the character is
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.Dv EOF
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or not valid in the initial shift state,
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.Fn btowc
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returns
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.Dv WEOF .
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.Pp
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The
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.Fn wctob
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function converts a wide character into a corresponding single-byte character.
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If the wide character is
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.Dv WEOF
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or not able to be represented as a single byte in the initial shift state,
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.Fn wctob
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returns
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.Dv EOF .
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.Pp
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The _l-suffixed versions take an explicit locale argument, while the
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non-suffixed versions use the current global or per-thread locale.
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.Sh SEE ALSO
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.Xr mbrtowc 3 ,
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.Xr multibyte 3 ,
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.Xr wcrtomb 3
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.Sh STANDARDS
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The
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.Fn btowc
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and
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.Fn wctob
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functions conform to
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.St -p1003.1-2001 .
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.Sh HISTORY
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The
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.Fn btowc
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and
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.Fn wctob
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functions first appeared in
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.Fx 5.0 .
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