wcswidth (3) - Linux Manuals

wcswidth: determine columns needed for a fixed-size wide-character string

NAME

wcswidth - determine columns needed for a fixed-size wide-character string

SYNOPSIS

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

int wcswidth(const wchar_t *s, size_t n);

DESCRIPTION

The wcswidth() function returns the number of columns needed to represent the wide-character string pointed to by s, but at most n wide characters. If a nonprintable wide character occurs among these characters, -1 is returned.

RETURN VALUE

The wcswidth() function returns the number of column positions for the wide-character string s, truncated to at most length n.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
wcswidth() Thread safetyMT-Safe locale

CONFORMING TO

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

NOTES

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

COLOPHON

This page is part of release 5.10 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/.

SEE ALSO

iswprint(3), wcwidth(3)