WCSWIDTH(3) Linux Programmer's Manual WCSWIDTH(3)NAMEwcswidth - 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 repre‐
sent the wide-character string pointed to by s, but at most n wide
characters. If a nonprintable wide character occurs among these char‐
acters, -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
Multithreading (see pthreads(7))
The wcswidth() function is thread-safe with exceptions. It can be
safely used in multithreaded applications, as long as setlocale(3) is
not called to change the locale during its execution.
CONFORMING TO
POSIX.1-2001.
NOTES
The behavior of wcswidth() depends on the LC_CTYPE category of the cur‐
rent locale.
SEE ALSOiswprint(3), wcwidth(3)COLOPHON
This page is part of release 3.65 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/.
GNU 2014-01-22 WCSWIDTH(3)
