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WCSWIDTH(3) Library Functions Manual WCSWIDTH(3)

wcswidth, wcswidth_lnumber of column positions in wide-character string

library “libc”

#include <wchar.h>

int
wcswidth(const wchar_t *pwcs, size_t n);

#include <xlocale.h>

int
wcswidth_l(const wchar_t *pwcs, size_t n, locale_t locale);

The () and wcswidth_l() functions determine the number of column positions required for the first n characters of pwcs, or until a null wide character (L'\0') is encountered.

The () function takes an explicit locale argument, whereas the wcswidth() function uses the current global or per-thread locale.

The wcswidth() and wcswidth_l() functions return 0 if pwcs is an empty string (L""), -1 if a non-printing wide character is encountered, otherwise they return the number of column positions occupied.

iswprint(3), wcwidth(3), xlocale(3)

The wcswidth() function conforms to IEEE Std 1003.1-2001 (“POSIX.1”).

December 27, 2013 DragonFly-5.6.1