man:wcswidth
WCSWIDTH(3) Linux Programmer's Manual WCSWIDTH(3)
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 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
For an explanation of the terms used in this section, see attributes(7).
+-----------+---------------+----------------+ |Interface | Attribute | Value | +-----------+---------------+----------------+ |wcswidth() | Thread safety | MT-Safe locale | +-----------+---------------+----------------+
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
NOTES
The behavior of wcswidth() depends on the LC_CTYPE category of the cur- rent locale.
SEE ALSO
iswprint(3), wcwidth(3)
COLOPHON
This page is part of release 4.16 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/.
GNU 2015-08-08 WCSWIDTH(3)
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