NAME

wcwidth, wcwidth_l - number of column positions of a wide-character code

SYNOPSIS

#include <wchar.h>
int wcwidth(wchar_t wc);

#include <wchar.h>
#include <xlocale.h>
int wcwidth_l(wchar_t wc, locale_t loc);

DESCRIPTION

The wcwidth() function determines the number of column positions required for the wide character wc. The value of wc must be a character representable as a wchar_t, and must be a wide-character code corresponding to a valid character in the current locale.

The function wcwidth_l() behaves identically to wcwidth(), except instead of operating in the current locale, it operates in the locale specified by loc.

RETURN VALUES

These functions either return 0 (if wc is a null wide-character code), or the number of column positions to be occupied by the wide-character code wc, or −1 (if wc does not correspond to a printing wide-character code).

ERRORS

No errors are defined.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
CSI	Enabled
Interface Stability	See below.
MT-Level	MT-Safe

The wcwidth() function is Standard. The wcwidth_l() function is Uncommitted.