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 at-
tributes(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
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GNU 2015-08-08 WCSWIDTH(3)
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