2002-08-18 06:30:10 +00:00
|
|
|
.\" Copyright (c) 2002 Tim J. Robbins
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" 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.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
|
|
|
.\"
|
|
|
|
|
.\" $FreeBSD$
|
|
|
|
|
.Dd August 15, 2002
|
|
|
|
|
.Dt WCRTOMB 3
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm wcrtomb
|
|
|
|
|
.Nd "convert a wide-character code to a character (restartable)"
|
|
|
|
|
.Sh LIBRARY
|
|
|
|
|
.Lb libc
|
|
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.In wchar.h
|
|
|
|
|
.Ft size_t
|
2002-09-06 11:24:06 +00:00
|
|
|
.Fn wcrtomb "char * restrict s" "wchar_t wc" "mbstate_t * restrict ps"
|
2002-08-18 06:30:10 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Fn wcrtomb
|
|
|
|
|
function stores a multibyte sequence representing the
|
|
|
|
|
wide character
|
|
|
|
|
.Fa wc ,
|
|
|
|
|
including any necessary shift sequences, to the
|
|
|
|
|
character array
|
|
|
|
|
.Fa s ,
|
|
|
|
|
storing a maximum of
|
|
|
|
|
.Dv MB_CUR_MAX
|
|
|
|
|
bytes.
|
|
|
|
|
.Pp
|
|
|
|
|
If
|
|
|
|
|
.Fa s
|
|
|
|
|
is
|
|
|
|
|
.Dv NULL ,
|
|
|
|
|
.Fn wcrtomb
|
|
|
|
|
behaves as if
|
|
|
|
|
.Fa s
|
|
|
|
|
pointed to an internal buffer and
|
|
|
|
|
.Fa wc
|
|
|
|
|
was a null wide character (L'\e0').
|
|
|
|
|
.Pp
|
|
|
|
|
The
|
|
|
|
|
.Ft mbstate_t
|
|
|
|
|
argument,
|
|
|
|
|
.Fa ps ,
|
|
|
|
|
is used to keep track of the shift state.
|
|
|
|
|
If it is
|
|
|
|
|
.Dv NULL ,
|
|
|
|
|
.Fn wcrtomb
|
|
|
|
|
uses an internal, static
|
|
|
|
|
.Ft mbstate_t
|
|
|
|
|
object.
|
|
|
|
|
.Sh RETURN VALUES
|
|
|
|
|
The
|
|
|
|
|
.Fn wcrtomb
|
|
|
|
|
functions returns the length (in bytes) of the multibyte sequence
|
|
|
|
|
needed to represent
|
|
|
|
|
.Fa wc ,
|
|
|
|
|
or
|
|
|
|
|
.No ( Ns
|
|
|
|
|
.Ft size_t Ns
|
|
|
|
|
.No ) Ns \&-1
|
|
|
|
|
if
|
|
|
|
|
.Fa wc
|
|
|
|
|
is not a valid wide character code.
|
|
|
|
|
.Sh ERRORS
|
|
|
|
|
The
|
|
|
|
|
.Fn wcrtomb
|
|
|
|
|
function will fail if:
|
|
|
|
|
.Bl -tag -width Er
|
|
|
|
|
.\".It Bq Er EINVAL
|
|
|
|
|
.\"Invalid argument.
|
|
|
|
|
.It Bq Er EILSEQ
|
|
|
|
|
An invalid wide character code was specified.
|
|
|
|
|
.El
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr mbrtowc 3 ,
|
|
|
|
|
.Xr setlocale 3 ,
|
|
|
|
|
.Xr wctomb 3
|
|
|
|
|
.Sh STANDARDS
|
|
|
|
|
The
|
|
|
|
|
.Fn wcrtomb
|
|
|
|
|
function conforms to
|
|
|
|
|
.St -isoC-99 .
|
|
|
|
|
.Sh BUGS
|
|
|
|
|
The current implementation does not support shift states.
|
