x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
WCWIDTH(3) Linux Programmer's Manual WCWIDTH(3)
NAME
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 repre-
sent 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
Multithreading (see pthreads(7))
The wcwidth() 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.
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 cur-
rent locale.
SEE ALSO
iswprint(3), wcswidth(3)
COLOPHON
This page is part of release 3.69 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
http://www.kernel.org/doc/man-pages/.
GNU 2014-01-22 WCWIDTH(3)
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