TOWCTRANS(3P)						     POSIX Programmer's Manual						     TOWCTRANS(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       towctrans - wide-character transliteration

SYNOPSIS

       #include <wctype.h>

       wint_t towctrans(wint_t wc, wctrans_t desc);

DESCRIPTION

       The towctrans() function shall transliterate the wide-character code wc using the mapping described by desc. The  current  setting  of  the
       LC_CTYPE  category  should be the same as during the call to wctrans() that returned the value desc.  If the value of desc is invalid (that
       is, not obtained by a call to wctrans() or desc is invalidated by a subsequent call to setlocale() that has affected category  LC_CTYPE	),
       the result is unspecified.

       An  application	wishing to check for error situations should set errno to 0 before calling towctrans(). If errno is non-zero on return, an
       error has occurred.

RETURN VALUE

       If successful, the towctrans() function shall return the mapped value of wc using the mapping described by desc. Otherwise, it shall return
       wc unchanged.

ERRORS

       The towctrans() function may fail if:

       EINVAL desc contains an invalid transliteration descriptor.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The  strings  "tolower" and "toupper" 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.

	      towlower(wc)    towctrans(wc, wctrans("tolower"))
	      towupper(wc)    towctrans(wc, wctrans("toupper"))

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       towlower(), towupper(), wctrans(), the Base Definitions volume of IEEE Std 1003.1-2001, <wctype.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- 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 .

IEEE
/The Open Group						       2003							     TOWCTRANS(3P)