.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
.\"
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.\" References consulted:
.\"   GNU glibc-2 source code and manual
.\"   Dinkumware C library reference http://www.dinkumware.com/
.\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
.\"   ISO/IEC 9899:1999
.\"
.TH WCTOB 3 2017-09-15 "GNU" "Linux Programmer's Manual"
.SH NAME
wctob \- try to represent a wide character as a single byte
.SH SYNOPSIS
.nf
.B #include <wchar.h>
.PP
.BI "int wctob(wint_t " c );
.fi
.SH DESCRIPTION
The
.BR wctob ()
function tests whether
the multibyte representation of the
wide character
.IR c ,
starting in the initial state, consists of a single
byte.
If so, it is returned as an
.IR "unsigned char" .
.PP
Never use this function.
It cannot help you in writing internationalized
programs.
Internationalized programs must never distinguish single-byte and
multibyte characters.
.SH RETURN VALUE
The
.BR wctob ()
function returns the single-byte representation of
.IR c ,
if it exists, of
.B EOF
otherwise.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface	Attribute	Value
T{
.BR wctob ()
T}	Thread safety	MT-Safe
.TE
.sp 1
.SH CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99.
.SH NOTES
The behavior of
.BR wctob ()
depends on the
.B LC_CTYPE
category of the
current locale.
.PP
This function should never be used.
Internationalized programs must never
distinguish single-byte and multibyte characters.
Use either
.BR wctomb (3)
or the thread-safe
.BR wcrtomb (3)
instead.
.SH SEE ALSO
.BR btowc (3),
.BR wcrtomb (3),
.BR wctomb (3)
.SH COLOPHON
This page is part of release 4.15 of the Linux
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%https://www.kernel.org/doc/man\-pages/.