wctrans man page

wctrans — wide-character translation mapping


#include <wctype.h>

wctrans_t wctrans(const char *name);


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.

  "tolower" - realizes the tolower(3) mapping
  "toupper" - realizes the toupper(3) mapping

Return Value

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


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

Interface Attribute Value
wctrans() Thread safety MT-Safe locale

Conforming to

POSIX.1-2001, POSIX.1-2008, C99.


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

See Also



This page is part of release 4.09 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Referenced By

ksh(1), towctrans(3).

2015-08-08 GNU Linux Programmer's Manual