mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
115 lines
3.4 KiB
Groff
115 lines
3.4 KiB
Groff
.\" Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
|
|
.\" Copyright (c) 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" Donn Seeley of BSDI.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 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.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" From @(#)multibyte.3 8.1 (Berkeley) 6/4/93
|
|
.\" From FreeBSD: src/lib/libc/locale/multibyte.3,v 1.22 2003/11/08 03:23:11 tjr Exp
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 11, 2004
|
|
.Dt MBTOWC 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm mbtowc
|
|
.Nd convert a character to a wide-character code
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In stdlib.h
|
|
.Ft int
|
|
.Fo mbtowc
|
|
.Fa "wchar_t * restrict wcharp" "const char * restrict mbchar"
|
|
.Fa "size_t nbytes"
|
|
.Fc
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn mbtowc
|
|
function converts a multibyte character
|
|
.Fa mbchar
|
|
into a wide character according to the current conversion state,
|
|
and stores the result
|
|
in the object pointed to by
|
|
.Fa wcharp .
|
|
Up to
|
|
.Fa nbytes
|
|
bytes are examined.
|
|
.Pp
|
|
A call with a null
|
|
.Fa mbchar
|
|
pointer returns nonzero if the current encoding requires shift states,
|
|
zero otherwise;
|
|
if shift states are required, the shift state is reset to the initial state.
|
|
.Sh RETURN VALUES
|
|
If
|
|
.Fa mbchar
|
|
is
|
|
.Dv NULL ,
|
|
the
|
|
.Fn mbtowc
|
|
function returns nonzero if shift states are supported,
|
|
zero otherwise.
|
|
.Pp
|
|
Otherwise, if
|
|
.Fa mbchar
|
|
is not a null pointer,
|
|
.Fn mbtowc
|
|
either returns 0 if
|
|
.Fa mbchar
|
|
represents the null wide character, or returns
|
|
the number of bytes processed in
|
|
.Fa mbchar ,
|
|
or returns \-1 if no multibyte character
|
|
could be recognized or converted.
|
|
In this case,
|
|
.Fn mbtowc Ns 's
|
|
internal conversion state is undefined.
|
|
.Sh ERRORS
|
|
The
|
|
.Fn mbtowc
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EILSEQ
|
|
An invalid multibyte sequence was detected.
|
|
.It Bq Er EINVAL
|
|
The internal conversion state is invalid.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr btowc 3 ,
|
|
.Xr mblen 3 ,
|
|
.Xr mbrtowc 3 ,
|
|
.Xr mbstowcs 3 ,
|
|
.Xr multibyte 3 ,
|
|
.Xr wctomb 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn mbtowc
|
|
function conforms to
|
|
.St -isoC-99 .
|