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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "TOWCTRANS" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" towctrans 
+.SH NAME
+towctrans \- wide-character transliteration
+.SH SYNOPSIS
+.LP
+\fB#include <wctype.h>
+.br
+.sp
+wint_t towctrans(wint_t\fP \fIwc\fP\fB, wctrans_t\fP \fIdesc\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fItowctrans\fP() function shall transliterate the wide-character
+code \fIwc\fP using the mapping described by
+\fIdesc\fP. The current setting of the \fILC_CTYPE\fP category should
+be the same as during the call to \fIwctrans\fP() that returned the
+value \fIdesc\fP.   \ If the value
+of \fIdesc\fP is invalid (that is, not obtained by a call to \fIwctrans\fP()
+or
+\fIdesc\fP is invalidated by a subsequent call to \fIsetlocale\fP()
+that has affected
+category \fILC_CTYPE ),\fP the result is unspecified.
+.LP
+An application wishing to check for error situations should set \fIerrno\fP
+to 0 before calling \fItowctrans\fP(). If
+\fIerrno\fP is non-zero on return, an error has occurred. 
+.SH RETURN VALUE
+.LP
+If successful, the \fItowctrans\fP() function shall return the mapped
+value of \fIwc\fP using the mapping described by
+\fIdesc\fP. Otherwise, it shall return \fIwc\fP unchanged.
+.SH ERRORS
+.LP
+The \fItowctrans\fP() function may fail if:
+.TP 7
+.B EINVAL
+\fIdesc\fP contains an invalid transliteration descriptor. 
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+The strings \fB"tolower"\fP and \fB"toupper"\fP are reserved for the
+standard mapping names. In the table below, the
+functions in the left column are equivalent to the functions in the
+right column.
+.sp
+.RS
+.nf
+
+\fBtowlower(\fP\fIwc\fP\fB)    towctrans(\fP\fIwc\fP\fB, wctrans("tolower"))
+towupper(\fP\fIwc\fP\fB)    towctrans(\fP\fIwc\fP\fB, wctrans("toupper"))
+\fP
+.fi
+.RE
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fItowlower\fP() , \fItowupper\fP() , \fIwctrans\fP() , the Base Definitions
+volume of IEEE\ Std\ 1003.1-2001, \fI<wctype.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .