'\" te
.\"
.\" This file and its contents are supplied under the terms of the
.\" Common Development and Distribution License ("CDDL"), version 1.0.
.\" You may only use this file in accordance with the terms of version
.\" 1.0 of the CDDL.
.\"
.\" A full copy of the text of the CDDL should have accompanied this
.\" source.  A copy of the CDDL is also available via the Internet at
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.\"
.\"
.\" Copyright (c) 2014 Joyent, Inc.  All rights reserved.
.\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
.\"
.TH WCTRANS 3C "Jun 25, 2014"

.SH NAME
towctrans, towctrans_l, wctrans, wctrans_l \- define and perform transliteration mappings
.SH SYNOPSIS
.LP
.nf
#include <wctype.h>

\fBwint_t\fR \fBtowctrans\fR(\fBwint_t\fR \fIwc\fR, \fBwctrans_t\fR \fIdesc\fR);
.fi
.LP
.nf
\fBwint_t\fR \fBtowctrans_l\fR(\fBwint_t\fR \fIwc\fR, \fBwctrans_t\fR \fIdesc\fR, \fBlocale_t\fR \fIloc\fR);
.fi
.LP
.nf
\fBwctrans_t\fR \fBwctrans\fR(\fBconst char *\fR \fItranclass\fR);
.fi
.LP
.nf
\fBwctrans_t\fR \fBwctrans_l\fR(\fBconst char *\fR \fItranclass\fR, \fBlocale_t\fR \fIloc\fR);
.fi
.SH DESCRIPTION
.LP
The functions
.B wctrans()
and
.B wctrans_l()
are used to obtain a handle to a table that maps one set of wide
characters to another. They return an object of type
.I wctrans_t
which can be used with the functions
.B towctrans()
and
.BR towctrans_l() .
The valid set of classes that are available depends on the locale.
The following names are valid in all locales:
.TP
"tolower"
Conversion from upper case to lower case characters.
.TP
"toupper"
Conversion from lower case to upper case characters.
.LP
The
.B towctrans()
and
.B towctrans_l()
functions convert the wide character
.IR wc
based on the conversion table specified by
.IR desc .
.LP
The functions
.B towctrans_l()
and
.B wctrans_l()
are equivalent to the functions
.B towctrans()
and
.BR wctrans() ,
but instead of operating in the current locale, they operate on the
locale specified by
.IR loc .
.SH RETURN VALUES
On successful completion,
.B towctrans()
and
.B towctrans_l()
functions return the character that corresponds to the argument passed
through the mapping table described by
.IR desc .
Otherwise, they return the character unchanged and set
.BR errno .
On successful completion,
.B wctrans()
and
.B wctrans_l()
functions return a non-zero identifier for
.IR tranclass .
On failure, they return zero and set
.BR errno .
.SH ERRORS
.LP
The
.B wctrans()
and
.B wctrans_l()
functions will fail if:
.TP
.B EINVAL
The mapping class specified by
.I tranclass
does not exist or is invalid.
.LP
The
.B towctrans()
and
.B towctrans_l()
functions will fail if:
.TP
.B EINVAL
The mapping class specified by
.I desc
is invalid.
.SH ATTRIBUTES
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.BR newlocale (3C),
.BR setlocale (3C),
.BR towlower (3C),
.BR towupper (3C),
.BR environ (7),
.BR locale (7)