TOWCTRANS(P) POSIX Programmer's Manual TOWCTRANS(P)NAMEtowctrans - 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 map‐
ping 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 ALSOtowlower() , 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 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 .
IEEE/The Open Group 2003 TOWCTRANS(P)
