iOS Manual Pages

This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles.

For more information about the manual page format, see the manual page for manpages(5).

WCSWIDTH(3)              BSD Library Functions Manual              WCSWIDTH(3)

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 charac-ter character
     ter (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
     iswprint(3), wcwidth(3), xlocale(3)

STANDARDS
     The wcswidth() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

BSD                             August 20, 2002                            BSD