wcwidth

Standard C library (libc, -lc)

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

int wcwidth(wchar_t wc);

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

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

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

POSIX.1-2008.

POSIX.1-2001.

Note that before glibc 2.2.5, glibc used the prototype

int wcwidth(wint_t wc);

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

iswprint(3), wcswidth(3)