wctrans(3)

NAME#

wctrans - wide-character translation mapping

LIBRARY#

Standard C library (libc, -lc)

SYNOPSIS#

#include <wctype.h>

wctrans_t wctrans(const char *\nname\n);

DESCRIPTION#

The wctrans_t type represents a mapping which can map a wide character to another wide character. Its nature is implementation-dependent, but the special value (wctrans_t) 0 denotes an invalid mapping. Nonzero wctrans_t values can be passed to the towctrans(3) function to actually perform the wide-character mapping.

The wctrans() function returns a mapping, given by its name. The set of valid names depends on the LC_CTYPE category of the current locale, but the following names are valid in all locales.

\n
    "tolower" - realizes the \ntolower\n(3) mapping
\n
    "toupper" - realizes the \ntoupper\n(3) mapping

RETURN VALUE#

The wctrans() function returns a mapping descriptor if the name is valid. Otherwise, it returns (wctrans_t) 0.

ATTRIBUTES#

For an explanation of the terms used in this section, see attributes(7).

STANDARDS#

C11, POSIX.1-2008.

HISTORY#

POSIX.1-2001, C99.

NOTES#

The behavior of wctrans() depends on the LC_CTYPE category of the current locale.

SEE ALSO#

towctrans(3)