NAME
wcswidth,
wcswidth_l —
number of column positions in
wide-character string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include
<wchar.h>
int
wcswidth(const wchar_t *pwcs,
size_t n);
#include <wchar.h>
#include <xlocale.h>
int
wcswidth_l(const wchar_t *pwcs,
size_t n, locale_t loc);
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.
Although the
wcswidth()
function uses the current locale, the
wcswidth_l()
function may be passed a locale directly. See
xlocale(3) for more information.
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”).