WCWIDTH

NAME

wcwidth − determine columns needed for a wide character

SYNOPSIS

#define _XOPEN_SOURCE /* See feature_test_macros(7) */
#include <wchar.h>

int wcwidth(wchar_t c);

DESCRIPTION

The wcwidth() function returns the number of columns needed to represent the wide character c. If c is a printable wide character, the value is at least 0. If c is null wide character (L'\0'), the value is 0. Otherwise −1 is returned.

RETURN VALUE

The wcwidth() function returns the number of column positions for c.

CONFORMING TO

POSIX.1-2001.

Note that glibc before 2.2.5 used the prototype
int wcwidth(wint_t c);

NOTES

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

SEE ALSO

iswprint(3), wcswidth(3)

COLOPHON

This page is part of release 3.54 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man−pages/.