Originální popis anglicky:
wcswidth - determine columns needed for a fixed-size wide character string
Návod, kniha: Linux Programmer's Manual
#include <wchar.h>
int wcswidth(const wchar_t *s, size_t n);
The
wcswidth function returns the number of columns needed to represent
the wide-character string pointed to by
s, but at most
n wide
characters. If a non-printable wide character occurs among these characters,
-1 is returned.
The
wcswidth function returns the number of column positions for the
wide-character string
s, truncated to at most length
n.
UNIX98
iswprint(3),
wcwidth(3)
The behaviour of
wcswidth depends on the LC_CTYPE category of the current
locale.
