NAME
wcswidth —
number of column positions in
wide-character string
SYNOPSIS
#include
<wchar.h>
int
wcswidth(const
wchar_t *pwcs, size_t
n);
DESCRIPTION
The
wcswidth()
function determines the number of column positions required for the first
n characters of pwcs, or until a
null wide character (L'\0') is encountered.
RETURN VALUES
The wcswidth() function returns 0 if
pwcs is an empty string (L""), -1 if a
non-printing wide character is encountered, otherwise it returns the number
of column positions occupied.
SEE ALSO
STANDARDS
The wcswidth() function conforms to
IEEE Std 1003.1-2001 (“POSIX.1”).
HISTORY
The wcswidth() function was ported from
NetBSD and first appeared in
OpenBSD 3.8.