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+'\" et
+.TH TOWCTRANS "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+
+.SH NAME
+towctrans,
+towctrans_l
+\(em wide-character transliteration
+.SH SYNOPSIS
+.LP
+.nf
+#include <wctype.h>
+.P
+wint_t towctrans(wint_t \fIwc\fP, wctrans_t \fIdesc\fP);
+wint_t towctrans_l(wint_t \fIwc\fP, wctrans_t \fIdesc\fP,
+    locale_t \fIlocale\fP);
+.fi
+.SH DESCRIPTION
+For
+\fItowctrans\fR():
+The functionality described on this reference page is aligned with the
+ISO\ C standard. Any conflict between the requirements described here and the
+ISO\ C standard is unintentional. This volume of POSIX.1\(hy2008 defers to the ISO\ C standard.
+.P
+The
+\fItowctrans\fR()
+and
+\fItowctrans_l\fR()
+functions shall transliterate the wide-character code
+.IR wc
+using the mapping described by
+.IR desc .
+.P
+The current setting of the
+.IR LC_CTYPE
+category in the current locale
+or in the locale represented by
+.IR locale ,
+respectively, should be the same as during the call to
+\fIwctrans\fR()
+or
+\fIwctrans_l\fR()
+that returned the value
+.IR desc .
+.P
+If the value of
+.IR desc
+is invalid (that is, not obtained by a call to
+\fIwctrans\fR()
+or
+.IR desc
+is invalidated by a subsequent call to
+\fIsetlocale\fR()
+that has affected category
+.IR LC_CTYPE ),
+the result is unspecified.
+.P
+If the value of
+.IR desc
+is invalid (that is, not obtained by a call to
+\fIwctrans_l\fR()
+with the same locale object
+.IR locale )
+the result is unspecified.
+.P
+An application wishing to check for error situations should set
+.IR errno
+to 0 before calling
+\fItowctrans\fR()
+or
+\fItowctrans_l\fR().
+.P
+If
+.IR errno
+is non-zero on return, an error has occurred.
+.P
+The behavior is undefined if the
+.IR locale
+argument to
+\fItowctrans_l\fR()
+is the special locale object LC_GLOBAL_LOCALE or is not a valid locale
+object handle.
+.SH "RETURN VALUE"
+If successful, the
+\fItowctrans\fR()
+and
+\fItowctrans_l\fR()
+functions shall return the mapped value of
+.IR wc
+using the mapping described by
+.IR desc .
+Otherwise, they shall return
+.IR wc
+unchanged.
+.SH ERRORS
+These functions may fail if:
+.TP
+.BR EINVAL
+.IR desc
+contains an invalid transliteration descriptor.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+The strings
+.BR \(dqtolower\(dq 
+and
+.BR \(dqtoupper\(dq 
+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 4
+.nf
+\fB
+towlower(\fIwc\fP)            towctrans(\fIwc\fP, wctrans("tolower"))
+towlower_l(\fIwc\fP, \fIlocale\fP)  towctrans_l(\fIwc\fP, wctrans("tolower"), \fIlocale\fP)
+towupper(\fIwc\fP)            towctrans(\fIwc\fP, wctrans("toupper"))
+towupper_l(\fIwc\fP, \fIlocale\fP)  towctrans_l(\fIwc\fP, wctrans("toupper"), \fIlocale\fP)
+.fi \fR
+.P
+.RE
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fItowlower\fR\^(\|)",
+.IR "\fItowupper\fR\^(\|)",
+.IR "\fIwctrans\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2008,
+.IR "\fB<wctype.h>\fP"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, Copyright (C) 2013 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .
+
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .