Man page - wcwidth(3)

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Manual

wcwidth

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
STANDARDS
HISTORY
NOTES
SEE ALSO

NAME

wcwidth - determine columns needed for a wide character

LIBRARY

Standard C library ( libc , -lc )

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).

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STANDARDS

POSIX.1-2008.

HISTORY

POSIX.1-2001.

Note that before glibc 2.2.5, glibc 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)