2004-11-03 13:51:07 +00:00
|
|
|
.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
|
|
|
|
|
.\"
|
|
|
|
|
.\" This is free documentation; you can redistribute it and/or
|
|
|
|
|
.\" modify it under the terms of the GNU General Public License as
|
|
|
|
|
.\" published by the Free Software Foundation; either version 2 of
|
|
|
|
|
.\" the License, or (at your option) any later version.
|
|
|
|
|
.\"
|
|
|
|
|
.\" 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 BTOWC 3 1999-07-25 "GNU" "Linux Programmer's Manual"
|
|
|
|
|
.SH NAME
|
|
|
|
|
btowc \- convert single byte to wide character
|
|
|
|
|
.SH SYNOPSIS
|
|
|
|
|
.nf
|
|
|
|
|
.B #include <wchar.h>
|
|
|
|
|
.sp
|
|
|
|
|
.BI "wint_t btowc(int " c );
|
|
|
|
|
.fi
|
|
|
|
|
.SH DESCRIPTION
|
2007-05-12 09:06:04 +00:00
|
|
|
The
|
|
|
|
|
.BR btowc ()
|
|
|
|
|
function converts \fIc\fP,
|
2007-04-12 22:42:49 +00:00
|
|
|
interpreted as a multibyte sequence
|
2004-11-03 13:51:07 +00:00
|
|
|
of length 1, starting in the initial shift state, to a wide character and
|
2007-04-12 22:42:49 +00:00
|
|
|
returns it.
|
|
|
|
|
If \fIc\fP is EOF or not a valid multibyte sequence of length 1,
|
2007-05-12 09:06:04 +00:00
|
|
|
the
|
|
|
|
|
.BR btowc ()
|
|
|
|
|
function returns WEOF.
|
2004-11-03 13:51:07 +00:00
|
|
|
.SH "RETURN VALUE"
|
2007-05-12 09:06:04 +00:00
|
|
|
The
|
|
|
|
|
.BR btowc ()
|
|
|
|
|
function returns the wide character
|
2007-04-12 22:42:49 +00:00
|
|
|
converted from the single byte \fIc\fP.
|
|
|
|
|
If \fIc\fP is EOF or not a valid multibyte sequence of length 1,
|
2004-11-03 13:51:07 +00:00
|
|
|
it returns WEOF.
|
|
|
|
|
.SH "CONFORMING TO"
|
2006-08-04 09:41:28 +00:00
|
|
|
C99, POSIX.1-2001.
|
2004-11-03 13:51:07 +00:00
|
|
|
.SH NOTES
|
2007-05-12 09:06:04 +00:00
|
|
|
The behaviour of
|
|
|
|
|
.BR btowc ()
|
|
|
|
|
depends on the LC_CTYPE category of the
|
2004-11-03 13:51:07 +00:00
|
|
|
current locale.
|
|
|
|
|
.PP
|
2007-04-12 22:42:49 +00:00
|
|
|
This function should never be used.
|
|
|
|
|
It does not work for encodings which have
|
2004-11-03 13:51:07 +00:00
|
|
|
state, and unnecessarily treats single bytes differently from multibyte
|
2007-04-12 22:42:49 +00:00
|
|
|
sequences.
|
2007-05-12 09:06:04 +00:00
|
|
|
Use the function
|
|
|
|
|
.BR mbtowc ()
|
|
|
|
|
instead.
|
2007-05-16 18:25:50 +00:00
|
|
|
.SH "SEE ALSO"
|
|
|
|
|
.BR mbtowc (3)
|
