wcwidth man page

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.

Attributes

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

InterfaceAttributeValue
wcwidth()Thread safetyMT-Safe locale

Conforming to

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

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

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Referenced By

curs_getcchar.3x(3), unicode(7), unigenwidth(1), wcswidth(3).

2015-08-08 GNU Linux Programmer's Manual